2026-05-30T23:47:49Z https://ejournal.undip.ac.id/index.php/index/oai

oai:ojs.ejournal.undip.ac.id:article/40855 2022-09-19T00:37:33Z teknik:ART

"220830 2022 eng " 2460-9919 0852-1697 dc Non-Microplastic Microbeads From Sago Liquid Waste With The Addition Of Chitosan as Antibacterial Function: A Review Silviana, Silviana Department of Chemical Engineering Faculty of Engineering Universitas Diponegoro Khoirudin, Fakhri Santo Pratama, Ferris Andhika Harahap, Rizky Putri Adelina Hasanah, Alfi Ruhmaningrum, Queen Khoiriyah, Lailatul Vianova, Saskia Santoso, Michelle Nabillarisa Qori Guslamari, Yoga Anugra Salsabila, Cantika Aulia Microbeads; Cellulose; Antibacterial; Chitosan; Sago liquid waste Plastic has many advantages due to flexibility, unaffordable, transparent, and toughness. Plastics can size into small sizes (microplastics) or large sizes (macroplastics). Microbeads are granules of plastic or fiber that can often be utilized in many personal care products with sizes below 1 mm. These size of microbeads affect to environmental. Microbeads cannot be filtered by the sewage treatment system resulting microbeads go through to end up in water bodies and become a dangerous pollutant. Therefore any efforts must be conducted to replace the use of plastics microbeads. The microbeads can be prepared from with organic materials having easily degradation with stand the same functions. One of the ways can be accomplished through preparation of  bacterial cellulose from sago waste since liquid waste can be used to produce bacterial cellulose. Bacterial cellulose is highly potential to be developed into microbeads as it has advantages of high purity, good tissue structure, high degradation ability, mechanical strength, and easy degradability. The utilization of sago liquid waste is very beneficial because it can reduce environmental pollution and production costs. Additionally, antibacterial properties in microbeads can introduce chitosan, eucalyptus filtrate, celery leaf extract, basil, and cinnamon. The use of chitosan as an additive in the preparation of microbeads will reduce the rate of water adsorption, improve mechanical properties, and reduce the moisture in the microbeads that would promote the ability of microbeads to against bacteria. Diponegoro University 2022-07-04 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/40855 TEKNIK; Vol. 43, No. 2 (2022): August 2022 eng Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/8391 2015-10-17T03:39:04Z teknik:ART

"150704 2015 eng " 2460-9919 0852-1697 dc RANCANG BANGUN MODEL KOMPRESI DAN TARIK PERMODELAN SANDBOX DAN MANFAATNYA Fahrudin, Fahrudin Program Studi Teknik Geologi, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang 50275 Asmarakandy, Dimas Program Studi Teknik Geologi, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang 50275 sandbox; sesar naik; morfologi; thrust fault; morphology Permodelan sandbox dibuat dengan system tektonik konvergen dan divergen dengan menggunakan pergerakan satu sumbu. Permodelan ini bertujuan untuk membuat alat mesin sandbox yang bisa digunakan untuk penelitian dan pengajaran. Mesin berhasil dibuat dan sudah diujicobakan. Ujicoba dengan menggunakan satu lapisan pasir yang diambil dari Formasi Ngrayong. Percobaan selanjutnya dengan beberapa lapisan. Percobaan dilakukan dengan pengamatan yang meliputi pengamatan permukaan dan penampang verikal. Pengamatan yang aspek morfologi, kelurusan struktur, dan perkembangan sesar yang terbentuk. Hasil percobaan menunjukkan bahwa pembentukan morfologi sangat berkaitan dengan pembentukan sesar. Struktur sesar dengan pola forward propagating thrust faults. Sesar tersebut disebabkan imbrikasi. Lipatan yang terbentuk akibat mekanisme propagasi sesar. [Design of Compression and Extensional of the Sandbox Model and Its Benefit] Divergent and convergent tectonic sytem can be studied from the sandbox modelling. This model has a axis of movement. Sandbox models itends to study the progress of structural geology such as fault and fold. We successfully made machine of sandbox. This machine has basal detachment from duraluminum. Material for model is taken by loose sand from Ngrayong Formation. This experiment focused to observation about morphology in surface and thrust or backthrust in subsurface. This experiment has compression system. Result of model was that morphological sequences associated with fault sequences. Fault is formed to have the pattern of forward propagating thrust faults. It’s caused by imbricate thrust system. Folding is formed by the mechanism of fault propagation folding.   Diponegoro University 2015-07-04 16:42:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/8391 TEKNIK; Vol 36, No 1 (2015): (Juli 2015) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1697 2012-02-10T06:41:42Z teknik:ART

2460-9919 0852-1697 dc KAJIAN GEOLOGI LINGKUNGAN PADA LOKASI PENAMBANGAN BATUAN DIABAS GUNUNG PARANG DALAM RANGKA KONSERVASI BATUAN DI CAGAR ALAM GEOLOGI KARANGSAMBUNG Mustofa Nur, Arief Diabas, Parang hill, Conservation, Karangsambung. Diabas Parang hill is one of location which conservated in area conservation of geological Karangsambung.Now, it is threatened, because there are many mines at surrounding it. Activities of mining not care science andenvironmental conservation.Impact of mining so cause change of topography/morphology, slope become more steep, and mining locationbecome potentially accure rock fall and landslide. Pursuant to result of laboratory analysis, engineeringproperties diabas Parang hill strongless than andesit so it is only fulfil for trotoir.For diabas conservation which is protected so need affort to stop activity of mining. The effort can do seekingaltenative location for mine and/or to change mine activities. Diponegoro University 2012-02-02 14:48:56 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1697 TEKNIK; Volume 32, Nomor 2, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/24880 2020-07-10T16:19:01Z teknik:ART

"200531 2020 eng " 2460-9919 0852-1697 dc Saragih, Debora Decynthia Tyas, Wido Prananing Kelurahan Tingkir Lor terkenal sebagai sentra industri konveksi berbasis rumah yang telah berdiri sejak tahun 1970an dan masih berdiri hingga saat ini. Kegiatan ekonomi lokal ini ternyata berkontribusi besar terhadap pendapatan rumah tangga masyarakat lokal Tingkir Lor, namun pada saat ini usaha industri konveksi lainnya yang berada di luar Tingkir Lor baik dari dalam negeri maupun dari luar negeri telah banyak berdiri sehingga membuat tingkat persaingan dalam pasar penjualan semakin berat. Ditambah lagi dengan tingkat pendidikan pemilik usaha industri konveksi berbasis rumah di Tingkir Lor yang tergolong rendah sehingga penggunaan teknologi juga masih tergolong kurang, produknya yang masih tergolong cenderung monoton, dan faktor – faktor lainnya yang dapat menghambat perkembangan usaha ini. Hal - hal inilah yang kemudian menarik untuk diteliti dengan tujuan untuk mengkaji faktor – faktor yang mempengaruhi perkembangan usaha industri konveksi berbasis rumah di Tingkir Lor. Penelitian ini menggunakan teknik analisis statistik deskriptif, analisis crosstab yang disertai dengan uji Chi-square dan didukung dengan data kualitatif dari hasil wawancara. Hasil penelitian menunjukkan bahwa faktor yang mempengaruhi perkembangan usaha ini lebih didominasi oleh faktor dari dalam usaha itu sendiri (internal) meliputi kualitas produk usaha, jangkauan lokasi pemasaran, kendala modal, dan tingkat pendidikan pemilik usaha, sedangkan faktor eksternal yang berpengaruh terhadap perkembangan usaha ini yaitu kondisi infrastruktur meliputi kondisi jalan, jaringan listrik dan jaringan telekomunikasi. Diponegoro University 2020-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/24880 TEKNIK; Vol 41, No. 1 (2020): May 2020 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/24880/70000 Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2078 2012-02-22T03:40:22Z teknik:ART

2460-9919 0852-1697 dc EVALUASI KELAYAKAN PENDANAAN PROYEK DENGAN TEKNIK PEMROGRAMAN LINIER Partono, Windu Linear programming, optimize resources, project cost evaluation cash flow One main problem characterizes linear programming is to seek the maximum or minimum of a linearexpression when the variables of the problem are subject to restrictions in the form of certain linearequalities or inequalities. Problems of this kind are encountered when we have to exploit limitedresources in an optimal way. Project Cost Evaluation which play an important role in project are ofspecial significance in this respect. The real problem of Project Cost Evaluation analysis are tomanipulate cash flow problems of project into linear programming model or mathematical model.This method should be selected technically according the actual condition of the project. In designingand selecting the mathematical models, it is necessary to take into consideration the relationshipbetween the limited resources (money) and the optimal solution. Diponegoro University 2012-02-10 11:26:10 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2078 TEKNIK; Volume 28, Nomor 1, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/58820 2023-10-12T21:21:38Z teknik:EI

"230830 2023 eng " 2460-9919 0852-1697 dc Back Matter TEKNIK, Editor in Chief Department of Electrical Engineering TEKNIK Artikel editorial ini berisi back-matter TEKNIK Volume 44 Nomor 2 Tahun 2023 yang memuat petunjuk penulisan dan pengiriman artikel TEKNIK Diponegoro University 2023-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/58820 TEKNIK; Vol. 44, No. 2 (2023): August 2023 eng Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/9011 2020-04-17T09:31:49Z teknik:ART

"161231 2016 eng " 2460-9919 0852-1697 dc Analisis Desain Sistem Pembangkit Listrik Tenaga Surya Kapasitas 50 WP Ramadhan, Anwar Ilmar Jurusan Teknik Mesin, Fakultas Teknik, Universitas Muhammadiyah Jakarta, Jl. Cempaka Putih Tengah No 27 Jakarta 10510 Diniardi, Ery Jurusan Teknik Mesin, Fakultas Teknik, Universitas Muhammadiyah Jakarta, Jl. Cempaka Putih Tengah No 27 Jakarta 10510 Mukti, Sony Hari Jurusan Teknik Mesin, Fakultas Teknik, Universitas Muhammadiyah Jakarta, Jl. Cempaka Putih Tengah No 27 Jakarta 10510 Sel Surya; Analisis Desain; Sistem Photovoltaic; energi listrik; Solar Cell; Design Analysis; Photovoltaic System; Electric Power Kebutuhan akan listrik baik untuk kalangan industri, perkantoran, maupun masyarakat umum dan perorangan sangat meningkat. Tetapi, peningkatan kebutuhan listrik ini tidak diiringi oleh penambahan pasokan listrik. Berdasarkan permasalahan tersebut, energi surya dipilih sebagai energi alternatif untuk menghasilkan energi listrik. Alat yang digunakan disini adalah sel surya, karena dapat mengkonversikan langsung radiasi sinar matahari menjadi energi listrik (proses photovoltaic). Agar energi surya dapat digunakan pada malam hari, maka pada siang hari energi listrik yang dihasilkan disimpan terlebih dahulu ke baterai yang dikontrol oleh regulator. Keluaran regulator langsung dihubungkan dengan inverter dari arus DC ke AC. Hasil pengujian modul surya (photovoltaic) terlihat bahwa hasil daya keluaran rata-rata mencapai 38,24 Watt,dan arus yang didapatkan sebesar 2,49 A (Ampere). Hal ini dikarenakan photovoltaic saat mengikuti arah pergerakan matahari akan selalu memposisikan photovoltaic untuk tetap menghadap matahari sehingga tetap akan dapat menangkap pancaran matahari secara maksimal.  [Title: Design Analysis of System Power Solar Cells Capacity of 50 Wp] The need for electricity is good for the industry, offices, and public and individuals are greatly increased. However, the increase in demand for electricity is not accompanied by the additional power supply. Based on these problems, chosen solar energy as an alternative energy to generate electric power. A tool that is used here is the solar cell because it can directly convert solar radiation into electrical energy (photovoltaic process). So that solar energy can be used at night, then during the day, the electrical energy generated is stored before a battery which is controlled by the regulator. Regulator output is directly connected to the inverter from the DC to AC. The test results of solar modules (photovoltaic) indicated that the results of the average power output reached 38.24 Watt, and the currents were 2.49 A. This is because the photovoltaic follows the direction of movement of the sun and always located at the photovoltaic to remain facing the sun. Therefore, it will still be able to capture the radiant sun to the fullest. Diponegoro University 2016-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/9011 TEKNIK; Vol 37, No 2 (2016): (Desember 2016) eng Copyright (c) 2016 Teknik

oai:ojs.ejournal.undip.ac.id:article/1754 2012-02-15T04:03:20Z teknik:ART

2460-9919 0852-1697 dc ANALISIS FAKTOR INTENSITAS TEGANGAN (SIF) DENGAN VARIASI PANJANG RETAK PADA PELAT GELADAK UTAMA KAPAL “ MT. KLAWOTONG “ DENGAN MENGGUNAKAN METODE ELEMEN HINGGA (FEM) Kiryanto, Kiryanto crack, Fracture Mechanics (FM), Finite Element Method (FEM), Shear Intensity Factor (SIF). Crack defect on main deck plate is source of failure ship structure. Small intensity of crack in the future canbe to large influence lateral force and bending moment. Crack defect characteristics can be to know shearintensity factor (SIF) on main deck is used mathematics simulation model based on fracture mechanics (FM)and finite element method (FEM). Goal of this research know characteristics main deck plate get a crack withload forces while deck plate start is loading until to crack propagation good stability.The MT Klawotong is chose in this research . Main deck plate is location as the sample. It is number 3 oncargo oil. Any analysis of data that is to counting of profile constructions, length strength, modeling withANSYS Version 9.0 and counting of shear intensity factor (SIF).Research on this structure failure result any substance that is, Sagging condition plate shears 50.34 MPa withsafety factor 8,939 crack long maximum is 0.02 m, value of shear intensity factor (SIF) KI WD. Pilkey = 12.615MPa m , KII WD. Pilkey = 0 MPa m , KI ANSYS = 13.,451 MPa m , KII ANSYS = 0.693 MPa m . Prosentaso oferror counting programe KI = 0.062 %, KII = 1% . The ather hand Hoging condition plate shears 15.08 MPawith safety factor 29.841 crack long maximum is 0 .3 m , value of shear intensity factor (SIF) KI WD. Pilkey=14.,645 MPa m , KII WD. Pilkey = 0 MPa m , KI ANSYS = 15.585 MPa m , KII ANSYS = 0.352 MPa m ,Prosentaso of error counting programe KI = 0.062 %, KII = 1%. Diponegoro University 2012-02-02 14:41:15 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1754 TEKNIK; Volume 31, Nomor 1, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/33209 2021-06-03T02:07:03Z teknik:ART

"210503 2021 eng " 2460-9919 0852-1697 dc Analysis of Current on Mechanical Properties and Microstructure of A53 Gr B Material with Gas Tungsten Arc Welding Process Tarmizi, Tarmizi Balai Besar Logam dan Mesin, Kementerian Perindustrian Nugraha, Yudha Bakti Jurusan Teknik Metalurgi, Fakultas Teknik, Universitas Jenderal Achmad Yani Irfan, Irfan Balai Besar Logam dan Mesin, Kementerian Perindustrian GTAW; A53 Gr B; current; incomplete penetration; mechanical properties; microstructure Pengelasan dengan parameter proses yang tepat akan menghasilkan sambungan dengan sifat mekanik yang optimal. Kuat arus adalah parameter proses yang sangat penting dalam pengelasan. Proses Gas Tungsten Arc Welding (GTAW) pada baja karbon A53 Gr B menggunakan variasi kuat arus menjadi pilihan utama untuk mendapatkan kualitas sambungan las yang baik. Penelitian ini bertujuan untuk mendapatkan sifat mekanik yang optimum seperti kuat tarik, tekuk, nilai kekerasan dan struktur mikro dengan memvariasikan kuat arus. Metode percobaan menggunakan proses GTAW dengan memberikan variasi arus pada pengelasan baja A 53 Gr B dengan bentuk sambungan single V dan  posisi pengelasan 5G. Kecepatan aliran gas pelindung Argon 15 liter per menit dengan  filler rod ER 70 S-6. Variasi arus yang diberikan 70, 90 dan 110A dengan tegangan 11-13 V polaritas DCEN. Hasil pengujian sesuai ASME section IX menunjukkan bahwa spesimen kuat arus 90A memberikan hasil optimum dengan kuat tarik 480 MPa dan nilai kekerasan 190 HV. Sedangkan spesimen dengan arus pengelasan 70A terdapat cacat incomplete penetration pada daerah lasan. Penggunaan arus pengelasan 90A pada penelitian ini memberikan hasil las dengan sifat mekanik dan struktur mikro yang lebih baik dibandingkan dengan penggunaan kuat arus 70 dan 110A. Diponegoro University 2021-05-03 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/33209 TEKNIK; Vol. 42, No. 1 (2021): May 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4384 2013-01-22T02:50:02Z teknik:ART

"121015 2012 eng " 2460-9919 0852-1697 dc POTENSI MIKROALGA SEBAGAI SUMBER BIOMASA DAN PENGEMBANGAN PRODUK TURUNANNYA Noer, Abyor Handayani Dessy, Ariyanti Array The first use of microalgae by humans as food detected in the dates back 2000 years, but the development of biotechnology of microalgae just began in the middle of this century. Microalgae refer to biomass resource contain many useful components such as protein, carbohydrate, fatty acid, etc. Products based microalgae are diverse from human food and nutrition, animal feed and nutrition up to fine chemicals such as triglycerides which is able to be converted to biodiesel. Microalgae is a promising biomass resources, (i) microalgae is renewable resources which has high biodiversity properties, (ii) production cost of converting process from microalgae biomass into its derivatives relatively low, (iii) product derivatives of microalgae have a high demand in market. Based on above, microalgae can be developed further to be applied as raw material for food, energy and pharmacy. This paper described microalgae in general and the developing technology used to produce commercial microalgae based product. Diponegoro University 2012-07-12 10:30:29 https://ejournal.undip.ac.id/index.php/teknik/article/view/4384 TEKNIK; Volume 33, Nomor 2, Tahun 2012 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/57735 2025-04-17T01:00:27Z teknik:ART

"240830 2024 eng " 2460-9919 0852-1697 dc Radityaningrum, Arlini Dyah Institut Teknologi Adhi Tama Surabaya Ichsan, Muchammad Kusuma, Maritha Nilam Tingginya konsentrasi Mangan (Mn(II)) dan kekeruhan dalam air sumur yang digunakan untuk air minum berdampak negatif pada kesehatan manusia. Proses hibrid aerasi bubble-filtrasi merupakan alternatif pengolahan dalam penyisihan Mn(II) dan kekeruhan. Microbubble dapat digunakan dalam proses aerasi untuk meningkatkan konsentrasi Dissolved Oxygen (DO) dalam air. Diameter microbubble mempengaruhi konsentrasi DO yang digunakan dalam proses oksidasi Mn(II). Penelitian ini bertujuan untuk a) menentukan konsentrasi DO dalam air setelah proses aerasi, b) mengkaji kinerja proses hibrid aerasi bubble-filtrasi untuk  menyisihkan konsentrasi Mn(II) dan kekeruhan dalam air. Aerasi microbubble dioperasikan menggunakan venturi injektor dengan variasi diameter nozel dan waktu kontak. Media filter yang digunakan adalah pasir silika, manganese greensand, dan zeolit. Sampel uji diambil di inlet aerasi dan outlet filtrasi. Pengambilan sampel uji dilakukan secara semi-intermiten, pada menit ke-20, 35, dan 50, dengan dua kali pengulangan. Konsentrasi DO tertinggi (6,31 mg/L) dihasilkan dari proses hibrid menggunakan diameter nozel 6 mm dengan waktu kontak 50 menit. Konsentrasi Mn(II) terendah (0,12 mg/L) diperoleh pada proses hibrid yang menggunakan nozel berdiameter 7 mm, dengan efisiensi penyisihan 94%. Efisiensi penyisihan kekeruhan tertinggi (60%) adalah pada proses hibrid yang menggunakan diameter nozel 7 mm, dengan nilai kekeruhan yang dicapai sebesar 14,36 NTU. Diponegoro University 2024-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/57735 TEKNIK; Vol 45, No 2 (2024): August 2024 ind Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/13495 2020-04-17T09:35:41Z teknik:ART

"180731 2018 eng " 2460-9919 0852-1697 dc Rancangan Desain Produk Setrika Pegas Menggunakan Metode Kano Nurjannah, Anisa Program Studi Teknik Industri, Fakultas Teknologi Industri, Universitas Islam Indonesia Purnomo, Hari Program Studi Teknik Industri, Fakultas Teknologi Industri, Universitas Islam Indonesia setrika listrik; ergonomi; KANO; Voice of Customer Penelitian ini mendesain produk setrika listrik dengan fitur-fitur yang sesuai dengan keinginan dan kepuasan penggunanya. Untuk mengetahui fitur-fitur yang diinginkan oleh pengguna, dilakukan wawancara tentang tanggapan dan usulan desain setrika sebagai perbaikan dari produk setrika listrik yang telah beredar di pasaran. Output dari tahapan ini adalah Voice of Customer. Setelah diperoleh voice of customer, maka dicari tingkat kepentingan tiap fitur tersebut menggunakan metode KANO. Dari pengolahan dengan metode KANO diperoleh 6 fitur dengan tingkat kepuasan attractive dan one-dimentional yang sangat perlu untuk dikembangkan, yaitu fitur ringan, gagang nyaman dipegang, tahan lama, ringan, kesesuaian warna, serta hemat listrik. Fitur keamanan berfokus pada alas setrika/konduktor yang dibuat dengan sistem yang dapat digerakkan naik turun dengan menggunakan pegas, sehingga bagian panas setrika hanya dapat keluar dari kerangka luar jika mendapat tekanan dari penggunanya. Dengan sistem ini, setrika menjadi lebih aman untuk digunakan. Fitur gagang nyaman digenggam dibuat dengan memanfaatkan aspek ergonomi. Fitur tahan lama dan ringan ditentukan dari material yang digunakan, yaitu ebonit sebagai kerangka luar dan aluminium sebagai konduktor alas setrika. Kesesuaian warna pada setrika dipilih dengan warna yang tidak terlalu mencolok serta memenuhi aspek psikologis manusia. Untuk menghemat listrik, digunakan pengontrol suhu/panas, sehingga dapat disesuaikan dengan kebutuhan pengguna. Diponegoro University 2018-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/13495 TEKNIK; Vol 39, No 1 (2018): (July 2018) eng Copyright (c) 2018 Teknik

oai:ojs.ejournal.undip.ac.id:article/1867 2012-02-15T03:26:54Z teknik:ART

2460-9919 0852-1697 dc BENDING OF REINFORCING BARS TESTING METHOD AND INFLUENCE ON STRUCTURES Warsianto, Hari Narayudha, Moga bend test, reinforcing bars, tensile strength, ductility, cracks Reinforcing bars in concrete elements functions as the component carrying tensile stresses after concretecracking. This is due to that fact that concrete exhibit very high compression strength combined with avery low tensile capacity. The tensile stressed are transferred to the bars by the bond between thereinforcement and the concrete.Bars are generally produced in strands 6 to 12 meter in length so that bending for transportation andhandling purposes becomes necessary. At the site bars are straightened, and then sometimes re-bent forassembling purposes. This process will result in a loading and re-loading of steel.The ASTM E-290 mandated that bars have to pass the bending test, whereas reinforcing steel bars arebend to almost 1800 to ensure material ductility. In the past five years the Construction and MaterialLaboratory, Diponegoro University has been questioned with the issue as to how far this bending andstraightening influences the quality and what the significance of testing is.This paper will evaluate theinfluence of bending and straightening and the testing procedure involved. Diponegoro University 2012-02-02 14:36:47 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1867 TEKNIK; Volume 30, Nomor 2, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/36836 2021-12-16T21:29:52Z teknik:ART

"211217 2021 eng " 2460-9919 0852-1697 dc Damanik, Dermina Roni Santika Jurusan Teknik Sipil Fakultas Teknik, Universitas Simalungun Sianturi, Novdin Manoktong Saragih, Deardo Samuel Purba, Virgo Erlando Salah satu metode perbaikan tanah gambut adalah metode preloading menggunakan timbunan. Daya dukung tanah gambut yang rendah dapat diantisipasi dengan perkuatan. Model timbunan dibuat dari potongan besi yang diberikan secara bertahap, sedangkan perkuatan dibuat dari grid bambu dengan kombinasi tiang. Penelitian ini bertujuan untuk menentukan penurunan dan lendutan sistem perkuatan pada tanah gambut menggunakan simulasi numeris dan perbandingannya dengan hasil pengamatan. Metode penelitian dilakukan melalui model uji di laboratorium menggunakan bak uji berukuran 120 cm x 90 cm x 90 cm. Variasi uji model dibedakan berdasarkan panjang tiang masing-masing 10 cm, 25 cm, dan 35 cm. Beban-beban yang diterapkan terdiri dari 1,51 kPa, 3,02 kPa, 4,53 kPa, 6,05 kPa, dan 7,56 kPa. Melalui uji model didapatkan data-data penurunan di tengah timbunan dan lendutan pada arah melintang timbunan. Selanjutnya, simulasi numeris dengan Plaxis 2D dilakukan pada model yang sama dengan pengamatan untuk menganalisis penurunan dan lendutan akibat timbunan. Pola penurunan dan lendutan hasil simulasi numeris menggunakan plaxis 2D memberikan hasil yang mendekati sama atau sedikit lebih baik dibandingkan dengan data pengamatan, terutama pada tiang-tiang yang lebih panjang. Diponegoro University 2021-12-17 04:29:52 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/36836 TEKNIK; Vol 42, No. 3 (2021): December 2021 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/36836/110849 Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/6724 2014-12-24T02:20:43Z teknik:ART

"131203 2013 eng " 2460-9919 0852-1697 dc STUDI PENGARUH VARIABEL-VARIABEL DALAM CFD UNTUK MENGHITUNG KOEFISIEN TAHANAN KAPAL Chrismianto, Deddy Staf Pengajar Jurusan Teknik Perkapalan Fakultas Teknik Universitas Diponegoro Manik, Parlindungan Staf Pengajar Jurusan Teknik Perkapalan Fakultas Teknik Universitas Diponegoro Array Commonly, the Computational Fluid Dynamic (CFD) analysis using the finite volume method, solid modeling is usually used in the early stage in order to prepare a mesh process before the computational process is executed. In this paper the CFD analysis must be executed to obtain a resistance coefficient value, and the verification should be done to ensure a result is close to experimental data. In the CFD analysis, some parameters have been taken into account, including the variation of domain dimensions, variation of mesh sizes, and variation of boundary conditions, in which the comparison between the numerical analysis and experimental data showed good agreement in general. The result of the case no.1 has a smaller difference of the resistance coefficients to the experimental data than other cases, in which the total resistance coefficient (Ct) has a difference about 1.95% of experimental data, the friction resistance (Cf) has a difference about 0.83% of experimental data, and there is a difference about 6.30% of experimental data for the residual resistance (Cr). Diponegoro University 2013-12-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/6724 TEKNIK; Volume 34, Nomor 3, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67678 2025-07-07T19:46:40Z teknik:TE

"250322 2025 eng " 2460-9919 0852-1697 dc Economic and Performance Analysis of Bioethanol Production from Aren and Palm Biomass Using Ionic Liquid with SuperPro Designer as a Transportation Energy Transition Strategy Maulidin, Ihsan Department of Engineering Physics, Telkom University, Jl. Telekomunikasi. 1, Terusan Buahbatu - Bojongsoang, Telkom University, Sukapura, Kec. Dayeuhkolot, Kabupaten Bandung, Jawa Barat 40257 Utami, Amaliyah Rohsari I. Sugiwati, Sri Bioethanol, Biomassa, Ionic Liquid, SuperPro Designer This Increasing energy consumption has caused energy availability to become increasingly scarce, especially in Indonesia. Therefore, developing renewable energy sources, such as biofuels, is becoming increasingly important to support the energy transition in the transportation sector. One type of biofuel that is promising is bioethanol, which can be produced from biomass such as sugar palm and palm oil. However, the development of bioethanol still faces obstacles in terms of effectiveness, time, and production costs. Performance and economic analysis of bioethanol production from sugar palm and oil palm biomass with ionic liquid (IL) has been carried out using SuperPro Designer (SPD) software. This process begins with testing biomass characteristics to determine the most optimal sugar palm composition. Simulations with experimental conditions show that the optimal IL and biomass ratios are 1 g/g, resulting in ethanol concentrations of 92 g/L and 94 g/L, respectively, close to the theoretical results with 96% conversion of biomass to ethanol. Ethanol production on a factory scale shows cost reductions of up to 30% from initial prices. With the abundant availability of biomass, bioethanol production from sugar palm and palm oil has great potential to be developed in Indonesia, supporting the energy transition strategy in the transportation sector and reducing dependence on fossil fuels. Diponegoro University 2025-02-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67678 TEKNIK; Vol 46, No 1 (2025) January 2025 eng Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/24219 2020-03-17T01:25:09Z teknik:EI

"190531 2019 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi back-matter jurnal Teknik Volume 39 Nomor 1 Tahun 2018 yang memuat petunjuk penulisan dan pengiriman artikel jurnal Teknik Diponegoro University 2019-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/24219 TEKNIK; Vol 40, No. 1 (2019): Mei 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1934 2012-08-08T06:08:30Z teknik:ART

2460-9919 0852-1697 dc MODEL PENDANAAN ARMADA KAPAL NASIONAL FUNDING MODEL of NATIONAL SHIP ARMADA Ridwan, Mohd Funding Model, Shipping Armada Domination of Foreign ship armada in trading activity of exsport/import and interisland in Indonesia,couse deficit state 99 trilium rupiah per year. The national shipping armada can not serve sea transportto support commercial activity. They have not provides enough ship armada capacity for tradingcommodity, and dosent enaugh funding development of new ship armada, so that national armada freightcapacity always downwards along increasingly ship age. Economic from transportation sector of seawhich capital intensive, labour intensive and high tech, requires a policy of government which insubvention with funding especially from banking sector and finance companies non bank. It is requiredmodel or funding pattern which to support the sector, expected later national ship armada can transportall commerce commodity of exsport/import and interisland in country Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1934 TEKNIK; Volume 29, Nomor 2, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/35432 2021-05-06T06:54:02Z teknik:EI

"201231 2020 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi front-matter jurnal Teknik Volume 41 Nomor 3 Tahun 2020, yaitu meliputi halaman sampul, fokus dan ruang lingkup Teknik, informasi indeksasi, susunan tim penyunting dan mitra bebestari, kata pengantar editor dan daftar isi  Diponegoro University 2020-11-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/35432 TEKNIK; Vol 41, No. 3 (2020): December 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1684 2012-02-10T07:42:07Z teknik:ART

2460-9919 0852-1697 dc SISTEM PENGUKURAN KINERJA DENGAN METODE PERFORMANCE PRISM (Studi Kasus di RUMAH SAKIT ISLAM SULTAN AGUNG SEMARANG) Prastawa, Heru Pujotomo, Darminto Arvianto, Ary Khoirunnisa, Fithria Performance Measurement, Performance Prism, AHP, OMAX Sultan Agung Islamic Hospital Semarang is a healthcare institution owned by Yayasan Badan Wakaf SultanAgung. To survive against the competitors, the hospital must have a good performance. Thus, a properperformance measurement system is required to assist the company in informing the hospital, so they know howfar has their effort worked in achieving the company’s vision and mission, including to analyze how far has thecompany developed. The researcher intends to design a performance measurement system using theperformance prism method at Sultan Agung Islamic Hospital Semarang. Designing a performance measurementsystem by implementing the performance prism method is sequenced by several phases. Firstly, identify thesatisfaction and stakeholder’s contribution, strategy identification phase, process, and capability, KeyPerformance Indicator (KPI) identification phase, weighing KPI by Analytical Hierarchy Process (AHP) phase,achieving performance targets by an Objective Matrix (OMAX) phase, and the calculation phase of performancevalue in numbers. After we calculate the weighed KPI and performance value, a simulation is conducted to knowthe criteria and KPI elements that is prioritized a suggestion, improvement recommendation that could beapplied to enhance the performance of Sultan Agung Islamic Hospital Semarang Diponegoro University 2012-02-02 14:47:08 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1684 TEKNIK; Volume 32, Nomor 1, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/23473 2020-07-10T16:18:50Z teknik:ART

"200531 2020 eng " 2460-9919 0852-1697 dc Sulardjaka, Sulardjaka Nugroho, Sri Ismail, Rifky Enceng gondok (Eichhornia crassipes) merupakan tumbuhan perairan yang memiliki laju pertumbuhan cepat. Pertumbuhan populasi yang tinggi menyebabkan berbagai persoalan yang menyangkut gangguan keseimbangan ekosistem, gangguan irigasi dan sedimentasi. Enceng gondok memiliki potensi untuk diaplikasikan dalam pembuatan komposit serat alam. Serat selulosa dari tanaman enceng gondok dapat dimanfaatkan sebagai penguat pada pembuatan komposit. Kajian pustaka ini bertujuan untuk memberikan kajian potensi pengembangan pemanfaatan serat enceng gondok dalam pembuatan komposit serat alam. Pemanfaatan serat enceng gondok sebagai penguat komposit untuk aplikasi komersial masih sangat terbatas. Hal ini disebabkan sifat mekanis yang dihasilkan masih rendah. Untuk mendapatkan kekuatan komposit yang semakin meningkat, diperlukan penerapan dan optimasi parameter proses pengolahan serat, perlakuan awal serat dalam pembuatan komposit serat enceng gondok. Kajian pustaka ini selain memberikan kajian literatur tentang sifat fisis dan mekanis komposit serat enceng gondok yang telah dihasilkan juga memberikan kajian literatur tentang faktor yang mempengaruhi sifat serat alam, sifat kimia, sifat fisis, sifat mekanis, proses pembuatan serat, dan perlakuan serat sehingga hasil penelitian tersebut dapat digunakan rujukan dalam pengembangan komposit dengan penguat serat enceng gondok. Diponegoro University 2020-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/23473 TEKNIK; Vol 41, No. 1 (2020): May 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2038 2012-02-21T03:46:41Z teknik:ART

2460-9919 0852-1697 dc SISTEM VENTILASI DALAM KAPAL Utomo, Budi Ventilation system in ships, Natural ventilation and mechanical ventilation. Ventilation in ships is a process substitute dirty air in a hold of ship with fresh air from outside. If meansfor keep air in compartment always clean or fresh to make people comfort and to limit influence destructionpart of ship also rattenness of cargo that caused by too high dampness of the air.Ventilation system in ships differences two kind, that are natural ventilation system and mechanicalventilation system.Natural ventilation principles uses movement or flow of natural air, for example there are wind or air flowthat caused by symptom of air rising because temperature different. Where as on mechanical ventilationsystem the principles same with natural ventilation system, but air movement helped by ventilator oranother similar tools that rotation in the tube. Diponegoro University 2012-02-10 11:26:10 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2038 TEKNIK; Volume 28, Nomor 1, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/41131 2023-06-25T22:39:35Z teknik:ART

"230531 2023 eng " 2460-9919 0852-1697 dc Sugiarti, Ni Wayan Noviantoro, Mathias Sukadana, I Gusti Ketut Subagia, I Dewa Gede Ary https://orcid.org/0000-0002-6125-6152 Makalah ini menyampaikan hasil penelitian kekuatan tarik sambungan resistance welding (RW) dari komposit berbasis anyaman serat jute matrik polypropylene (JFRP). Metode RW dilakukan menggunakan pengaliran arus listrik pada kawat nikelin. Pada proses pengelasan untuk kawat nikelin adalah divariasikan yaitu ukuran diameter 0,3 mm dan 0,5 mm. Tujuan penelitian untuk menyelidiki kekuatan sambungan menggunakan metode RW menurut variasi diameter kawat nikelin. Pada pengujian masing-masing sampel diujikan sebanyak 5 kali pengulangan yang didasarkan pada standar ASTM D 638. Pengujian tarik dilakukan pada Universal Testing Machine (UTM) dengan cross head speed 3 mm/min, dan load cell 5 kN. Hasil penelitian menunjukkan bahwa JFRP dalam sambungan lapisan tunggal yang diikat dengan kawat nikelin berdiameter 0,5mm memiliki kekuatan tarik tertinggi dibandingkan dengan kawat nikelin berdiameter 0,3mm masing-masing adalah 213,58±0,05 MPa dan 210,34±0,05 MPa. Sementara itu, Modulus Young dari sambungan lapisan tunggal JFRP dengan diameter kawat nikelin berdiameter 0,3 mm memiliki nilai lebih tinggi dari kawat nikelin dengan diameter 0,5mm masing-masing adalah 8,16±0,05 GPa dan 8,44±0,05 GPa. Kemudian, regangan patah dari JFRP memiliki nilai yang sama 4% untuk kedua model sambungan. Kesimpulan menunjukkan bahwa pengelasan resistensi cukup menjanjikan untuk mengikat komposit termoplastik. Selain itu, diameter kawat nikelin adalah faktor penting yang mempengaruhi sifat mekanis sambungan. Diponegoro University 2023-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/41131 TEKNIK; Vol. 44, No. 1 (2023): May 2023 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/41131/136498 Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/9832 2020-04-17T09:31:16Z teknik:ART

"160730 2016 eng " 2460-9919 0852-1697 dc Modifikasi Pati Sukun (Artocarpus Altilis) dengan Teknik Oksidasi Menggunakan Hidrogen Peroksida Tanpa Katalis Budiyati, Catarina Sri Department of Chemical Engineering, Diponegoro University, Jl. Prof. Soedarto, Kampus Undip Tembalang, Semarang 50275 Kumoro, Andri Cahyo Department of Chemical Engineering, Diponegoro University, Jl. Prof. Soedarto, Kampus Undip Tembalang, Semarang 50275 Ratnawati, Ratnawati Department of Chemical Engineering, Diponegoro University, Jl. Prof. Soedarto, Kampus Undip Tembalang, Semarang 50275 Retnowati, Diah Susetyo breadfruit; hydrogen peroxide; oxidation; starch Salah satu sumber bahan pangan lokal yang belum banyak dimanfaatkan adalah buah sukun (Artocarpus Artilis) yang cukup banyak terdapat di Indonesia. Akan tetapi, pemanfaatan buah sukun terkendala pada kurangnya daya simpan buah segar. Oleh karena itu, perlu dilakukan upaya untuk meningkatkan pemanfaatan buah sukun dengan mengolahnya menjadi produk yang lebih luwes dengan daya simpan yang lebih baik, yaitu menjadi pati sukun. Sifat-sifat pati sukun perlu diperbaiki agar dapat digunakan sebagai pengganti tepung terigu. Tujuan dari penelitian ini adalah untuk memodifikasi pati sukun dengan cara oksidasi menggunakan larutan hidrogen peroksida. Dalam penelitian ini dikaji pengaruh konsistensi luluhan, konsentrasi hidrogen peroksida, waktu, dan suhu terhadap karakteristik fisikokimia pati sukun teroksidasi yang dihasilkan dan ditentukan kondisi optimalnya. Hasil penelitian menunjukkan bahwa semua variable yang dikaji tersebut mempengaruhi reaksi oksidasi pati sukun. Oksidasi pada konsistensi luluhan 20%, konsentrasi hidrogen peroksida 2% dan suhu 50°C mampu menghasilkan nilai swelling power dan water solubility yang terbaik. Reaksi oksidasi tidak mengubah struktur dan morfologi pati sukun termodifikasi secara signifikan.   [Title: Modification of Breadfruit (Artocarpus altilis) starch through non-catalytic hydrogen peroxide oxidation] One of local source of food that has not been intensively explored is breadfruit (Artocarpus Artilis). However, the utilization of breadfruit is limited by the poor storage properties of the fresh fruit. Therefore, efforts should be made to improve the utilization of breadfruit to process it into more flexible products with better storability, suach as breadfruit starch. Breadfruit starch properties need to be improved so that it can be used to substitute wheat flour. The aim of this study was to modify the breadfruit starch by oxidation using hydrogen peroxide solution. This work studied examined the influence of consistency of starch slurry, hydrogen peroxide concentration, time, and temperature on the physicochemical properties of the oxidized breadfruit starch. The optimal conditions were also determined. The results showed that all of these variables affected the oxidation of starch breadfruit. The oxidation on starch slurry with consistency 20%, the concentration of hydrogen peroxide of 2%, and temperature of 50°C produced modified starch with best swelling power and water solubility. The oxidation did not significantly change the structure and morphology of the modified starch. Diponegoro University 2016-07-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/9832 TEKNIK; Vol 37, No 1 (2016): (Juli 2016) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1744 2012-02-10T06:29:29Z teknik:ART

2460-9919 0852-1697 dc STUDI GEOKIMIA FLUIDA PANASBUMI DAERAH PROSPEK PANASBUMI NGLIMUT, G. UNGARAN KECAMATAN LIMBANGAN, KABUPATEN KENDAL JAWA TENGAH Brahmo Emianto, Yohanes Aribowo, Yoga geothermometry, reservoir temperature, high enthalpy Fluid geochemistry is a useful method to analyse lateral and vertical processes and trends in a geothermalsystem, just like a blood and urine analysis to determine the functions of internal organs in human body. Fluidsgeochemistry study in Nglimut Geothermal Prospect has conducted to get information about type andcharacteristics of fluids, to predict reservoir temperature, and sub surface hidrogeochemical cycle model.From fluids geochemistry analysis, the most significant constituent is HCO3, and thus all fluids classified intobicarbonate water. Based on gethermometry analysis, the average reservoir temperature calculated is about206oC and classified into high enthalpy system Diponegoro University 2012-02-02 14:47:46 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1744 TEKNIK; Volume 32, Nomor 3, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/32661 2021-05-06T06:54:02Z teknik:ART

"201128 2020 eng " 2460-9919 0852-1697 dc The design of A Portable Fixed-Bed Composite Adsorber Column as a Biodiesel Purification Media with Packing Bed System Bimantio, Mohammad Prasanto Magister Teknik Sistem, Fakultas Teknik, Universitas Gadjah Mada Oktavianty, Herawati Widyasaputra, Reza biodiesel; adsorption; fixed bed column; equipment design Crude biodiesel membutuhkan proses pemurnian yang tepat dimana harus memenuhi spesifikasi standar biodiesel internasional  sehingga layak digunakan oleh konsumen. Selain itu pemurnian biodiesel bertujuan untuk memperpanjang umur simpan biodiesel sebelum digunakan. Permasalahan utama yang sering muncul pada proses pencucian adalah emulsifikasi dan oksidasi. Penggunaan adsorben secara umum bertujuan untuk penyerapan (mengadsorpsi) komponen-komponen bahan pengotor dalam minyak atau senyawa trigliserida. Kolom adsorbsi yang banyak digunakan adalah berbentuk kolom fix bed dengan isian kolom yang bertumpuk berantakan. Hal ini menyulitkan pada saat pembersihan dan pengisian adsorben, selain itu tumpukan adsorben yang tidak teratur akan menghabat proses aliran fluida yang ingin dimurnikan. Produk penelitian ini adalah desain alat Portable Fixed Bed Composite Adsorber Column yang terdiri dari 3 bagian, yaitu: top distributor, packing bed, dan bottom collector. Prinsip dari ketiga bagian tersebut adalah seperti puzzle yang dapat diatur jumlah packing bed-nya mengikuti kebutuhan pemurnian yang diinginkan. Ketiga bagian alat tersebut dihubungkan dengan ulir sehingga dapat dibongkar pasang sesuai keinginan. Bahan utama dari alat tersebut adalah PLA, namun dapat pula dibuat dari bahan lain sesuai kebutuhan misalnya stainless steel, kaca, atau akrilik. Alat ini harapannya dapat memenuhi kebutuhan pemurnian biodiesel berbasis adsorpsi yang mudah, murah, dan dapat dikustomisasi sesuai dengan jenis adsorben yang diinginkan. Desain alat ini dapat diduplikasi untuk proses pemurnian lain berbasis adsorpsi, seperti pemurnian bioethanol, air limbah, dsb.  Diponegoro University 2020-11-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/32661 TEKNIK; Vol 41, No. 3 (2020): December 2020 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/32661/96310 Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/3790 2012-07-18T08:47:52Z teknik:ART

"120409 2012 eng " 2460-9919 0852-1697 dc PENGARUH TEMPERATUR SOLAR TERHADAP PERFORMA MESIN DIESEL DIRECK INJECTION PUTARAN KONSTAN Murni, Murni Array The imperfect combustion process will be a problem in the development effort of diesel engine’s performance.Nonhomogen air–fuel mixing process is one of the factors which cause the imperfect combustion.By heating upthe diesel solar up to a certain temperature before it goes through the high pressure injection pump will lowerits density and viscosity. Therefore, when injected in the combustion chamber, it will formed smaller droplets offuel spray which result in a more homogenious air–fuel mixture. Also by using higher temperature will make thediesel fuel easier to ignite in order to compensate the limited time which is available in high speed operatingconditions. Diesel engine Dong Feng 1 cylinder direct injection at constant speed was used in this research. Thefuel used are solar with temperature variations in the range from 30oC to 70oC . The best thermal efficiency forsolar fuel is 30 % at 60oC with 28 % BSFC. In this condition, the fuel consumption was decreased 4 % bycomparing with that at 30oC. Diponegoro University 2012-07-12 10:29:15 https://ejournal.undip.ac.id/index.php/teknik/article/view/3790 TEKNIK; Volume 33, Nomor 1, Tahun 2012 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/60252 2025-04-24T18:11:04Z teknik:ART

"240613 2024 eng " 2460-9919 0852-1697 dc Evaluation of High Performance Interference Canceller to Boost the Error Performance of The Wi-Fi 5 IEEE 802.11ac Syafei, Wahyul Amien Department of Electrical Engineering, Diponegoro University https://scholar.google.co.id/citations?user=d9-akvEAAAAJ&hl=en Hidayatno, Achmad Department of Electrical Engineering, Diponegoro University Nurhayati, Oky Dwi Post Graduate School UNDIP Nugraheni, Dinar Post Graduate School UNDIP Wi-fi 5; IEEE802.11ac; interference canceller; MIMO; OFDM; ZF; MMSE; MLD The Wi-fi 5 IEEE 802.11ac can achieve throughput up to 6,933 Mbps by occupying 160MHz of bandwidth in each eight spatial streams with 256-QAM. It provides not only very high throughput but also high performance of wireless communications. However, due to the use of multiple antennas at both transmitter and receiver side which operate in the same frequency band; it experiences many interference signals. Therefore, a high-performance interference canceller is highly required to cancel these interferences and get the desired information back. The conventional interference cancellers are based on linear method, i.e. zero forcing and minimum mean square error. Both are simple but low in performance. This paper presents evaluation of a high-performance interference canceller based on maximum likelihood detection to boost the error performance of the wi-fi 5. Run test under in-door channel model demonstrates the superiority of this interference canceller. For target bit error rate of 10-4, it dramatically boosts the error performance by 16 dB and 17,5 dB compared to linear methods by the cost of very high complexity. Diponegoro University 2024-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/60252 TEKNIK; Vol. 45, No. 1 (2024): May 2024 eng Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/15073 2020-04-17T09:34:54Z teknik:ART

"171229 2017 eng " 2460-9919 0852-1697 dc Perancangan Sistem Pemantauan Gas dan Peringatan pada Ruangan melalui Jaringan Nirkabel Bhasworo, Gunawan Kunto Jurusan Teknik Elektro, Universitas Widyagama Malang http://orcid.org/0000-0002-6607-8674 http://orcid.org/0000-0002-6607-8674 Rofii, Faqih Jurusan Teknik Elektro, Universitas Widyagama Malang Hunaini, Fachrudin Jurusan Teknik Elektro, Universitas Widyagama Malang Gas; CO; H2S; Metana, Arduino uno; Wifi; TGS 2620; TGS 2602; TGS 244; Sistem Pemantau Gas; Peringatan pada Ruangan; Jaringan Nirkabel Udara adalah suatu campuran gas yang terdapat pada  lapisan yang mengelilingi bumi. Gas CO merupakan salah satu gas yang mengandung  zat yang tidak baik yang tidak dapat ditangkap oleh panca indera, gas tersebut bersifat membunuh makhluk hidup termasuk manusia. Hidrogen sulfida  (H2S) adalah gas yang tidak berwarna, beracun, mudah terbakar dan berbau seperti telur busuk. . Konsentrasi H2S dalam jumlah yang rendah, dapat membahayakan keselamatan manusia. Dalam konsentrasi 100 PPM dapat menyebabkan kematian dalam waktu 2-5 menit. Tidak kalah berbahayanya adalah hydrocarbon gas exploison atau ledakan yang diakibatkan kebocoran LPG (metana) pada ruang tertutup. Penelitian ini bertujuan untuk merancang dan mengimplementasikan sebuah sistem pemantau gas dan peringatan pada ruangan melalui jaringan nirkabel. Dengan menggabungkan PC (Personal Computer), Arduino, Arduino Wifi shield, Router, LCD (Liquid Crystal Display), Buzzer serta sensor gas TGS 2620 dan 2602 serta 2442 yang merupakan sensor-sensor dengan sensitivitas yang tinggi terhadap gas LPG (metana) dan H2S serta CO dengan konsumsi daya rendah. Di peroleh sistem pemantau gas dan peringatan pada ruangan melalui jaringan nirkabel yang dapat mendeteksi dan memberikan peringatan apabila ada gas-gas berbahaya CO, H2S dan LPG (metana) Diponegoro University 2017-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/15073 TEKNIK; Vol 38, No 2 (2017): (Desember 2017) eng https://ejournal.undip.ac.id/index.php/teknik/article/download/15073/36149 Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1824 2012-02-15T03:18:19Z teknik:ART

2460-9919 0852-1697 dc PERMASALAHAN AIRTANAH PADA DAERAH URBAN Triadi Putranto, Thomas Indra Kusuma, Kristi urban area, groundwater, groundwater overexploitation, Groundwater is one of water resources that can be exploitated to supply human being basic need becauseof its quality and quantity. Groundwater overexploitation can give negative impact to environmentalequilibrium. Human activities such as groundwater overexploitation, civilization problems, coastreclamation and industrial area developments can give groundwater problems in urban area. Groundwaterproblems that can be happened such as surface flooding, sea water intrusion, land subsidence andgroundwater pollution as the impact of human activities. Mitigations that can be conducted to minimizenegative impact of groundwater overexploitation are by technical and nontechnical programs Diponegoro University 2012-02-02 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1824 TEKNIK; Volume 30, Nomor 1, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/39715 2021-08-29T17:46:58Z teknik:ART

"210826 2021 eng " 2460-9919 0852-1697 dc Suprapto, Rachdian Eko Japarussidik, Japarussidik Sriyana, Sriyana Sadono, Kresno Wikan Penilaian risiko bendungan terdiri dari analisis risiko dan evaluasi risiko sebagai salah satu bentuk kegiatan operasi, pemeliharaan dan pemantauan bendungan. Penelitian bertujuan untuk melakukan penilaian risiko Bendungan Pelaparado di Desa Pela, Kecamatan Monta, Kabupaten Bima, Provinsi Nusa Tenggara Barat. Bendungan Pelaparado merupakan jenis bendungan urugan batu dengan inti kedap di tengah. Penilaian risiko bendungan pada penelitian menggunakan metode modifikasi ICOLD dan metode indeks risiko. Metode modifikasi ICOLD didasarkan pada hasil inspeksi lapangan, evaluasi desain bendungan, evaluasi pengelolaan keamanan bendungan dan identifikasi dampak kegagalan bendungan terhadap daerah hilir. Metode indeks risiko didasarkan pada pembobotan perhitungan empiris parameter bentuk kegagalan dari hasil inspeksi lapangan, desain bendungan dan analisis potensi bencana. Hasil penilaian risiko merupakan dasar pertimbangan dalam penentuan prioritas pemeliharaan untuk mencegah peningkatan potensi kegagalan bendungan. Hasil penelitian menunjukkan Bendungan Pelaparado memiliki nilai risiko sebesar 67 dengan kategori risiko “tinggi”, nilai indeks risiko total sebesar 227,56 dan nilai keamanan 72,91 dengan klasifikasi keamanan “cukup”, sehingga Bendungan Pelaparado aman terhadap beban normal tetapi kemungkinan kurang aman terhadap banjir desain dan gempa desain. Diponegoro University 2021-08-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/39715 TEKNIK; Vol. 42, No. 2 (2021): August 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/5635 2017-07-19T17:16:55Z teknik:ART

"130913 2013 eng " 2460-9919 0852-1697 dc PENGARUH KONSEP POLA GRID TERHADAP KEMAMPUAN JANGKAUAN LANSIA DI KELURAHAN KROBOKAN Pratiwi, Busada Eka Kristi Suprapti, Atiek Murtini, Titien Woro Array Elderly is people who aged 60 years and older and generaly has decreased physical and psychological. The number of elderly in Kelurahan Krobokan has reached 8.9%, its means that the region can be said to have an old structure. Elderly in Kelurahan Krobokan can still use their environment can still use their environment to get to a certain social facilities to meet their needs. Existing spatial pattern in the district is using a grid that has a lot of intersections. The purpose of this study was to determine the physical aspects of the elements forming a regular grid patterns that exist in the area of research, so as to affect the nonphysical aspects of the ability range of the elderly. Research methods that will be used is a qualitative method rationalistic. Where the assessment is used to form a grand theory of concept consisting of the variables that will be connected. Then the data analysis starts from reviewing and systematics of data that has been obtained by grouping data into variables that have been previously determined. The group is then presented in the form of maps, patterns, percentages and narrative text. The data that has been arranged, then made a conclusion and interpretation. An analysis found that the grid pattern affect the ability of elderly to use their environment. The positive influence that can reach the elderly Kelurahan Krobokan social facilities they want them to go the distance even beyond their ability. Diponegoro University 2013-10-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/5635 TEKNIK; Volume 34, Nomor 2, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67951 2025-07-07T19:46:40Z teknik:DC

"250322 2025 eng " 2460-9919 0852-1697 dc Hidayat, Maulana Nugroho, Hari Rukoh Reservoir is located in the upper part of Krueng (Kr.) Rukoh River Watershed, Pidie Regency, Aceh Province with a catchment area of 19.63 Km2. This reservoir has a storage capacity of 124.42 million m3 and is used for irrigation, drinking water and hydropower. The condition of Kr. Rukoh there is no discharge recording device, so to obtain discharge data it is necessary to convert rainfall data into discharge in the form of Rainfall-Runoff Model.  The purpose of this research is to calculate the amount of flow discharge and the suitability of the two rainfall-runoff models using the F.J. Mock method and NRECA method with observed discharge. Furthermore, determining the amount of reliable discharge as inflow availability of Rukoh reservoir. This research begins with the collection of rainfall data, evapotranspiration and condition parameters of the Rukoh Reservoir catchment area. The parameters in both models are optimized to obtain the optimal model discharge that is close to the observed  discharge data (Qobs). The results of the model suitability test showed that the NRECA model discharge is better compared to the F.J. Mock discharge model, the NSE test value = 0.64 and the correlation test value R = 0.83. Based on the selected discharge model, the calculation obtained the average flow discharge as Rukoh reservoir inflow of 1.13 m3 / sec and 80% water availability of Rukoh Reservoir by 0.58 m3/sec and 90% water availability obtained at 0.43 m3/sec. Diponegoro University 2025-02-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67951 TEKNIK; Vol 46, No 1 (2025) January 2025 ind Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/22189 2020-04-17T09:38:46Z teknik:ART

"190531 2019 eng " 2460-9919 0852-1697 dc Improving Purchase Decision Performance by Examining Brand Awareness, Association, Loyalty and Quality Perception using Multiple Regression Method: A Case Study of Truck Purchasing in PT AIIS Susanto, Novie Industrial Engineering Dept., Diponegoro University https://scholar.google.com/citations?user=DaIUTbsAAAAJ&hl=en Rinawati, Dyah Ika Ramadhani, Fery brand; perception; loyalty; decision; purchasing; truck Sales data and market share of a truck product called ILT in PT AIIS continues to decline during period 2014-2016. Based on these findings, this research examines how sales and market share of the truck could be improved. This research aims to examine the influence of brand awareness, brand association, perceived quality, and brand loyalty to the purchasing decision of ILT in PT. AIIS. The analysis technique uses multiple regression analysis. From the research result, it is found that only the brand awareness and perceived quality variables that positively and significantly influence the purchasing decision of ILT where brand awareness is the dominant factor that influences purchasing decisions. Adjusted R Square value of 0,521 indicates that 52.1% of variation of purchasing decision can be explained by four independent variables in regression equation while the rest equal to 47,9% explained by other variables which were not examined in this research. Diponegoro University 2019-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/22189 TEKNIK; Vol 40, No. 1 (2019): Mei 2019 eng Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1914 2012-02-24T11:23:19Z teknik:ART

2460-9919 0852-1697 dc PERBAIKAN MUTU PRODUK GENTENG MELALUI PERBAIKAN BAHAN BAKU (Studi Kasus Di Perusahaan Genteng UD.Tanah Mas Jepara) Adi W, Purnawan Purwanggono, Bambang Shodikin, Ali Roof tile product, Raw material, Clay, Sand By there is complaint from a part of customer of Jepara roof tile user this time, that is about the product ofless good Jepara roof tile, like the roof tile is mossy easily, fragile, leaky, low compressive strength or it isbroken when it is trampling, the case is back grounded by the raw material and technology are not advanceyet and also process of making roof tile is less perfect.By neglecting available process and technology, the writers try to improve the quality product of Jepara rooftile through the improvement of raw material. By adding the sand to the raw material with composition ofweight comparison 10:1, 5:1, 3:1 (clay : sand) and make an experiment directly by definite plasticity, dryand fire shrinkage, compressive strength, porosity and with analysis of variable cost calculation, so it can beconcluded that by adding sand to the raw material with weight comparison 5:1 (clay : sand), it is provenmost exactly in improve or increase the quality product of Jepara roof tile. Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1914 TEKNIK; Volume 29, Nomor 1, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/45292 2022-09-19T00:37:33Z teknik:ART

"220704 2022 eng " 2460-9919 0852-1697 dc Priastiwi, Yulita Arni Department of Civil Engineering, Universitas Diponegoro https://goo.gl/jIH1NE Nurhuda, Ilham Department of Civil Engineering, Universitas Diponegoro Antonio, Edo Department of Civil Engineering, Universitas Diponegoro Beton segmental merupakan salah satu metode yang dapat digunakan untuk konstruksi plat lantai yaitu dengan menyusun beberapa segmen beton berukuran kecil sehingga menjadi satu kesatuan struktur. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh jumlah segment terhadap perilaku dan kekuatan pelat lantai beton, ditinjau dari kapasitas beban, lendutan maksimum, dan kekakuan dari pelat lantai beton pracetak segmental. Benda uji yang digunakan untuk pengujian pelat lantai beton pracetak segmental menggunakan beton dengan kuat tekan (f’c) 25 MPa, dan baja tulangan tarik 2-D10. Dimensi panel pelat yang digunakan mempunyai panjang dua meter dan lebar 25 cm. Panel pelat beton segmental yang akan diuji mempunyai 5 variasi yaitu benda uji pelat beton tanpa segmen, benda uji satu segmen menggunakan topping beton, benda uji dua segmen, benda uji empat segmen, dan benda uji delapan segmen. Pengujian pelat lantai beton pracetak segmental dilakukan dengan metode pengujian lentur satu arah dengan dua titik pembebanan. Hasil pengujian menunjukkan bahwa kapasitas beban pelat segmental, kekakuan pelat segmental, dan daktilitas pelat segmental berbanding terbalik dengan jumlah segmen pelat lantai beton. Penurunan persentase beban ultimit pelat beton segmental dengan jumlah      n-segmen dapat dimodelkan dengan persamaan Pn = 100.e-0,111.n Diponegoro University 2022-07-04 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/45292 TEKNIK; Vol. 43, No. 2 (2022): August 2022 ind Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/24080 2020-04-17T09:39:54Z teknik:ART

"191231 2019 eng " 2460-9919 0852-1697 dc Aribowo, Windarto Nugroho, Amin Istadi, I. Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro https://scholar.google.co.id/citations?user=IYMP1eUAAAAJ&hl=en http://orcid.org/0000-0002-2914-3545 Katalis padat yang ramah lingkungan K2O/CaO-ZnO memiliki keunggulan untuk proses reaksi transesterifikasi meliputi sifat basa heterogen aktif, kelarutan rendah, kekuatan mekanik yang baik, dan dapat digunakan kembali. Penelitian ini bertujuan untuk mengkaji kinetika reaksi transesterifikasi minyak kedelai menjadi biodiesel menggunakan katalis padat K2O/CaO-ZnO untuk mendapatkan model persamaan laju reaksi heterogen. Kajian meliputi: prediksi mekanisme yang sesuai dengan data eksperimen melalui analisis ketergantungan perubahan laju reaksi terhadap perubahan masing-masing reaktan dan perumusan persamaan akhir laju reaksi. Persamaan laju reaksi yang dihasilkan dapat dipakai untuk perancangan reaktor. Hasil kajian menunjukkan bahwa mekanisme reaksi yang terjadi mengikuti mekanisme Eley-Rideal, dimana metanol yang teradsorpsi pada permukaan katalis bereaksi dengan trigliserida (minyak kedelai) pada fase cairnya menghasilkan biodiesel (fatty acid methyl ester) dan gliserol. Persamaan laju reaksi yang diperoleh digunakan dalam perancangan reaktor sehingga hubungan antara berat katalis yang dibutuhkan dengan konversi trigliserida menjadi biodiesel dan perhitungan volume reaktor yang dibutuhkan dapat dilakukan. Diponegoro University 2019-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/24080 TEKNIK; Vol 40, No. 3 (2019): Desember 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1966 2012-02-24T11:16:25Z teknik:ART

2460-9919 0852-1697 dc MODEL PREDIKSI TIGGI MUKA AIR SUNGAI KALI GARANG SEMARANG DENGAN JARINGAN SYARAF TIRUAN Windarto, Joko Pawitan, Hidayat Suripin, Suripin J.P., M. Januar Array One of the big rivers flowing in center of Semarang city is Garang river with watershed area about 220km2 and having characteristic such as big flood discharge and flash flood. Where flash flood on January25th 1990, caused more than 45 people died and goods losses until 8.5 billion rupiahs. One of some modelsto pedict water level is used black box model. Artificial Neural Network one’s of the black bock model . Inthis research, Artificial Neural Network (ANN) with back propagation method is used to predict waterlevel in Garang river where as input are rainfall in upstream of Garang river during two days, while asoutput is water level in downstream of Garang river for two hour later. Result of optimum predicting haveMSE 0.0037 and average of error 1.18 %. Diponegoro University 2012-02-02 14:39:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1966 TEKNIK; Volume 29, Nomor 3, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/55891 2023-06-25T22:50:24Z teknik:EI

"230531 2023 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi back-matter TEKNIK Volume 44 Nomor 1 Tahun 2023 yang memuat petunjuk penulisan dan pengiriman artikel TEKNIK. Diponegoro University 2023-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/55891 TEKNIK; Vol. 44, No. 1 (2023): May 2023 ind Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/8906 2015-12-09T05:21:40Z teknik:ART

"151210 2015 eng " 2460-9919 0852-1697 dc ANALISIS BIAYA TIDAK LANGSUNG PADA PROYEK PEMBANGUNAN BEST WESTERN STAR HOTEL & STAR APARTEMENT SEMARANG Nurdiana, Asri Program Studi Diploma III Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, biaya kualitas proyek; biaya risiko proyek; biaya tidak langsung proyek; cost of quality at project; cost of risk at project; indirect cost at project Biaya pada proyek konstruksi dibagi menjadi biaya langsung dan biaya tidak langsung. Biaya tidak langsung terkait dengan biaya tak terduga yang dapat diidentifikasi sebagai biaya yang harus dialokasikan untuk hal-hal yang tidak diprediksi sebelumnya, termasuk di dalamnya adalah biaya risiko dan biaya kualitas. Tujuan dari penelitian ini adalah untuk menghitung alokasi biaya kualitas, mengetahui alokasi biaya risiko, dan mengetahui alokasi biaya tidak langsung pada proyek konstruksi. Data diambil dari data primer yaitu data biaya risiko dan data sekunder berupa biaya kualitas, data proyek, dan penelitian sebelumnya. Data diolah dengan memprosentase biaya tidak langsung pada proyek yang disbandingkan terhadap nilai kontrak. Dari hasil analisis didapati bahwa hasil alokasi biaya langsung adalah 84% dan biaya tidak langsung adalah 16%. Sedangkan untuk keseluruhan biaya tidak langsung yang dialokasikan adalah sebagai berikut: Laba 10%, Biaya Kualitas 0,54%, Biaya Risiko 5,17%, Biaya overhead, dan biaya dll 0,29%.   [Title: Analysis of Indirect Cost at Projects of Best Western Star Hotel & Star Apartement Semarang] The cost at the construction project is divided into direct costs and indirect costs. Indirect costs related to unexpected coststhat can be identified as a cost that allocated to the things that are not predicted earlier, including the cost of risk and cost of quality. The aim of thisresearch are to determine the allocation of the quality cost, determine the allocationof the risk cost, and determine the allocation of indirect costs at construction project. The primary data that were taken are the data of risk cost, and the secondary data are cost of quality, project data, and previous research.Data processed by seeing the percentage of indirect costs at the project that compared to the contract value. From the analysis obtained that direct cost allocation is 84% and the indirect cost allocation is 16%. Whilethe indirect costs are allocated as follows: Profit 10%, Quality Cost 0.54%, Risk Cost t5.17%, overhead, etc. 0.29%.   Diponegoro University 2015-12-09 12:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/8906 TEKNIK; Vol 36, No 2 (2015): (December 2015) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1735 2012-02-10T06:29:29Z teknik:ART

2460-9919 0852-1697 dc APLIKASI TEKNOLOGI REVERSE OSMOSIS UNTUK PEMURNIAN AIR SKALA RUMAH TANGGA Ariyanti, Dessy Widiasa, I N. Reverse osmosis, Household reverse osmosis, Water treatment systems Initially, commercially available reverse osmosis (RO) systems were intended to use on ships for producing freshwater during long voyages. After the time, many developments have been conducted especially in membraneelement and system configuration. Such developments allow RO systems to be applied for home use with normalplumbing in households. A basic reverse osmosis system consists of a pressurized source of water, a membranesystem, and hoses of pipes that carry off and separate clean water and drain water. There are four types ofhousehold RO system, i.e.: undersink, whole house, multi family, farm and ranch. If a water quality problem isdue to several different contaminants, RO may be the most cost-effective method for their removal. Diponegoro University 2012-02-02 14:47:46 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1735 TEKNIK; Volume 32, Nomor 3, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/29516 2020-10-05T05:07:43Z teknik:ART

"200831 2020 eng " 2460-9919 0852-1697 dc Uji Akurasi Metode Berbasis Citra Satelit untuk Ekstraksi Data Batimetri Safi'i, Ayu Nur Badan Informasi Geospasial Dewi, Ratna Sari Badan Informasi Geospasial kedalaman; batimetri; batimetri berbasis citra; perairan dangkal, penginderaan jauh, SBES Citra penginderaan jauh memungkinkan pengumpulan data batimetri dengan cakupan luas, sehingga dapat diintegrasikan dengan informasi terestrial untuk pemodelan wilayah pesisir dan pemodelan garis pantai. Data batimetri berbasis citra satelit cukup menjanjikan karena kemampuannya untuk mengisi kesenjangan data kedalaman yang diperoleh dari survei hidrografi. Tujuan dari penelitian ini difokuskan untuk mengevaluasi tiga model dalam memperoleh informasi kedalaman. Model-model tersebut dibuat dengan mengintegrasikan data citra penginderaan jauh dan data pengukuran in-situ (pemeruman) untuk menyediakan dan mengisi data kedalaman di perairan dangkal kawasan pesisir antara permukaan laut dan batas awal data pemeruman. Tiga model yang dievaluasi yaitu: Random Forest (RF), Multi Linear Regression (MLR) dan Generalized Additive Model (GAM). Secara statistik (hasil RMSE), GAM lebih unggul dibandingkan MLR dan RF dalam memperoleh informasi kedalaman. Nilai RMSE masing-masing adalah 0,16, 0,32 dan 0,64 untuk GAM, MLR dan RF. Namun, dari hasil visualisasi, model SDB dengan menggunakan GAM sangat ‘smooth’. Sementara jika dilihat dari penggunaan data, RF sangat tergantung pada jumlah data training. Dalam hal ini, MLR cukup menjanjikan untuk digunakan dalam memperoleh informasi kedalaman karena memiliki akurasi model SDB yang baik dan memiliki pola kedalaman yang lebih andal/reliable. Selain itu, MLR tidak terlalu tergantung pada jumlah data training. Diponegoro University 2020-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/29516 TEKNIK; Vol 41, No. 2 (2020): August 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2147 2012-02-24T03:17:51Z teknik:ART

2460-9919 0852-1697 dc PENAMBAHAN HAMBATAN DALAM PERHITUNGAN TAHANAN KAPAL AKIBAT GERAK KAPAL PADA GELOMBANG Ariany, Zulfaidah Ship Resistance, ship motion, move Addition of resistance in calculation of ship resistance effect of ship motion at wave. Six natural degree offreedom by a ship thai is surging, swaying, heaving, rolling, pitching and yawing.In general movement bounce up ship have very complex geometry form and is influencing each other, eachother couple in an style system.Degradation of speed at ship done and conducted by at sea transport wayving (including wind) aim to avoidto damage or effect from green water on deck, slamming, racing propeller, and others. Is so that concludedthat calculation of ship resistance at ship progressively increase effect of ship motion at wave Diponegoro University 2012-02-10 11:25:01 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2147 TEKNIK; Volume 28, Nomor 2, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/60088 2025-04-24T18:11:04Z teknik:ART

"240613 2024 eng " 2460-9919 0852-1697 dc Pratama, Sadewa Eka Departemen Teknik Sipil, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Department of Civil Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Sukamta, Sukamta Pelaksanaan konstruksi Bendungan Sepaku Semoi dimulai pada Tahun 2020, tipe bendungannya berupa timbunan tanah homogen dan dilakukan pekerjaan timbunan terhadap tubuh bendungannya. Adanya faktor tahapan pekerjaan timbunan yang pada setiap fase akan menambah ketinggian tubuh bendungan serta faktor kualitas pemadatan timbunan tubuh bendungan dapat menyebabkan risiko kegagalan bendungan semakin meningkat. Oleh sebab itu, tujuan penelitian ini adalah untuk mengidentifikasi perilaku deformasi vertikal dari timbunan tubuh Bendungan Sepaku Semoi agar keamanan tubuh bendungan terjamin pada saat pelaksanaan konstruksi. Identifikasi perilaku deformasi vertikal pada penelitian ini dilakukan dengan cara mengevaluasi data pembacaan instrumentasi multilayer settlement terhadap kriteria penerimaan menggunakan metode prediksi deformasi saat konstruksi yang terdiri dari tiga metode yaitu total settlement, korelasi vertical strain vs fill height above, dan settlement index. Hasil evaluasi metode total settlement pada seluruh multilayer settlement menghasilkan perilaku normal, begitu juga dengan evaluasi metode korelasi vertical strain vs fill height above menghasilkan perilaku normal, serta evaluasi metode settlement index menghasilkan perilaku normal. Dari ketiga hasil evaluasi metode prediksi deformasi saat konstruksi tersebut dapat disimpulkan bahwa secara garis besar, perilaku deformasi vertikal saat pelaksanaan konstruksi Bendungan Sepaku Semoi mempunyai perilaku normal dan tidak melampaui batas dari kriteria yang diizinkan. Diponegoro University 2024-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/60088 TEKNIK; Vol. 45, No. 1 (2024): May 2024 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/60088/193530 Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/13803 2020-04-17T09:33:51Z teknik:ART

"170701 2017 eng " 2460-9919 0852-1697 dc Kecepatan Putaran Poros Pada Mesin Pembuat Pakan Pelet Berpenggerak Kayuh Sepeda Nugroho, Adi Universitas Putera Batam Wibowonoto, Arif pellets machine; axis; speed ratio; sprocket The background of this study is the human power inconsistensy to run the simple pellets machine spinner. One of the efforts is to use bicycle sprocket to transmit the power until it reaches the expected speed. The exact size of spocket is needed to gain the wanted speed which will be obtained through the speed rotation test on various size of spocket. Data collecting methode that are used on this study are literature study and observation. While data analysis is using parametric analysis technique and the measurement parameter variables are spocket size and axis spin speed (rpm). This research aims to determine the exact size of sprocket in order to reach 626 rpm. As it result is required 54 rpm at N₂ (18 T), 63 rpm at N₂ (21 T), and 72 rpm at N₂ (24 T) to reach 626 rpm. And the size of spockets are N₁ (34 T), N₂ (18 T, 21 T, 24 T), N₃ (42 T), N₄ (11T), N₅ (24 T) and N₆ (15 T). Diponegoro University 2017-07-01 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/13803 TEKNIK; Vol 38, No 1 (2017): (Juli 2017) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1772 2012-02-10T07:57:25Z teknik:ART

2460-9919 0852-1697 dc PERBANDINGAN TEKNIS DAN EKONOMIS ANTARA PENGGANTIAN BANTALAN POROS PROPELLER DIBANDINGKAN DENGAN PENGGESERAN POSISI V-BRACKET PADA KMP. KUMALA Budiarto, Untung Propeller shaft, Bearing, Exentric, V-bracket, Thordon In the propulsion systems there are three preference components main engine, propeller shaft, and propeller.KMP. Kumala is one for all passengers ship the owner PT. Darma Lautan Utama, there are it’s to experienceproblems to the systems propulsion to happen missalignment between construction v-bracket with sterntube,there are v-bracket to function become to hold up propeller shaft in the inside to find shaft bearing. Effect themissalignment, shaft can’t to turn, so need the realized preparing with the change to shaft bearing shapeexentric and to scrape position v-bracket the position again. In this finish task purporting to know the valuefrom side technics and economics between to realized the change shaft bearing shape exentric with to scrapeposition v-bracket to position again with account time to docking next time. From the result analyse to find thatto change the shaft bearing shape exentric to need faster time, material cost is more expensive, labour cost ischeaper, construction to v-bracket isn’t normaly, than to scrape position v-bracket to need the time is long time,material cost is cheaper, job cost is more expensive, construction v-bracket back to normal the position again,until to moment realization docking next time to need faster time, material cost and job cost is cheaper from tochange the shaft bearing shape exentric. Diponegoro University 2012-02-02 14:46:02 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1772 TEKNIK; Volume 31, Nomor 2, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/36929 2021-08-29T17:46:58Z teknik:ART

"210826 2021 eng " 2460-9919 0852-1697 dc Comparison of American Sign Language Use Identification using Multi-Class SVM Classification, Backpropagation Neural Network, K - Nearest Neighbor and Naive Bayes Gunawan, Vincentius Abdi Jurusan Teknik Informatika, Fakultas Teknik, Universitas Palangka Raya https://orcid.org/0000-0003-3267-7609 Putra, Leonardus Sandy Ade Jurusan Teknik Elektro, Fakultas Teknik, Universitas Tanjungpura https://orcid.org/0000-0003-4934-3859 american sign language; digital image processing; wavelet; multi-class svm; backpropagation neural network; k - nearest neighbor; naive bayes Komunikasi merupakan hal penting dalam menyampaikan informasi dari individu satu ke individu yang lain. Namun tidak semua individu di dunia dapat berkomunikasi secara verbal. Menurut WHO, tunarungu adalah salah satu gangguan pendengaran yang dialami oleh 466 juta orang secara global, dan 34 juta diantaranya adalah anak-anak, sehingga perlu adanya metode pembelajaran bahasa non-verbal bagi seseorang yang mengalami masalah pendengaran tersebut. Tujuan dari penelitian ini adalah membuat suatu sistem yang dapat membantu mengidentifikasi bahasa non-verbal agar mudah dimengerti secara real time. Untuk memperoleh tingkat keberhasilan yang tinggi dalam sistem, maka dibutuhkan metode yang tepat, salah satunya machine learning, didukung dengan penggunaan ektraksi ciri wavelate dan metode klasifikasi yang berbeda dalam pemrosesan citra. Machine learning dipilih dalam perancangan sistem ini karena mampu mengenali dan membandingkan hasil klasifikasi pada empat metode yang berbeda. Empat klasifikasi yang digunakan sebagai pembanding pengenalan gerak tangan dari American Sign Language adalah klasifikasi Multi-Class SVM, Backpropagation Neural Network Perambatan Balik, K - Nearest Neighbor (K-NN) dan Naïve Bayes. Dari pengujian yang telah dilakukan terhadap empat metode klasifikasi dapat diperoleh tingkat keberhasilan secara berurutan sebesar 99.3%, 98.28%, 97.7% dan 95.98%. Sehingga dapat disimpulkan bahwa klasifikasi dengan menggunakan Multi-Class SVM memiliki tingkat keberhasilan tertinggi dalam pengenalan bahasa American Sign Language yang mencapai 99.3%. Keseluruhan sistem dirancang dan diuji menggunakan MATLAB sebagai software pendukung dan pengolahan data. Diponegoro University 2021-08-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/36929 TEKNIK; Vol. 42, No. 2 (2021): August 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4818 2013-05-06T03:47:42Z teknik:ART

"130402 2013 eng " 2460-9919 0852-1697 dc PENGARUH ASPEK PELAKSANAAN KONSTRUKSI TERHADAP KINERJA WAKTU PROYEK (STUDI KASUS DI DINAS CIPTA KARYA DAN TATA RUANG PROVINSI JAWA TENGAH) Hartono, Hartono Lukman, Lukman Array At execution process of a project of construction of building development, start from idea of up to finishing of a project, will always influenced by previous activity, that is start from idea and planning which have been planned, as its execution guidance. process the the execution, will be related/relevant always with the expense, time and quality from itself construction. For that presumably require to perform of research for the problem of execution time of a project. This research target is to know the relation among execution of construction project to performance of project expense, and performance of project time. This research is expected by be of benefit to serve service, and direct related other party with the project organizer, so that project performance of below On duty Create the Masterpiece and Planology of Province of Central Java and improved later on day. From data analysis obtained.:Make-Up of amount and appliance condition used for the work of especial, execution method work, and draw the execution, will improve the time performance. Diponegoro University 2012-08-08 13:06:31 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/4818 TEKNIK; Volume 34, Nomor 1, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67803 2025-07-07T19:30:43Z teknik:ART

"250331 2025 eng " 2460-9919 0852-1697 dc Erista, Dicky Departement of Civil Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Sukamta, Sukamta The Budong-Budong Dam, located in the district of Central Mamuju, West Sulawesi Province, is currently under construction. The foundation plan of the dam is a layer of river deposits (alluvial) with a thickness of 25 m and a shallow water table depth, which has been shown to have liquefaction potential. This study aims to assess the liquefaction potential of the river deposit layer using some additional SPT test data. This research is expected to confirm the liquefaction potential of the river deposits layer so that it can be considered by the dam owner in determining the foundation excavation limit and prevent dam failure due to liquefaction. The liquefaction potential analysis was carried out using a semi-empirical procedure according to Idriss and Boulanger (2006). The analysis was performed under 2 (two) earthquake conditions, namely Operating Basis Earthquake (OBE) and Safety Evaluation Earthquake (SEE), using different values of fines content (5%, 15%, 35%) and earthquake magnitudes (6.8, 7.0, 7.3, 7.5 and 7.7). The analysis shows that the foundation plan of the Budong-Budong Dam has the potential for liquefaction under both OBE and SEE conditions, which generally occurs at a depth of about 10-12 m from the ground surface. The liquefaction potential of finer-grained river deposits tends to be lower Diponegoro University 2025-03-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67803 TEKNIK; Vol 46, No 2 (2025) April 2025 ind Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/12738 2020-04-17T09:36:38Z teknik:ART

"181231 2018 eng " 2460-9919 0852-1697 dc Analysis of Shaping Factors of Urban Infrastructure Spreading Characteristics in The Border Area of Semarang City ( Case Study: Sendang Mulyo Settlements) olivia, deasy Department of Architecture, Faculty of Engineering, Diponegoro University Setioko, Bambang Department of Architecture, Faculty of Engineering, Diponegoro University Pandelaki, Edward Endrianto Department of Architecture, Faculty of Engineering, Diponegoro University urban spreading characteristics; urban infrastructure; border area; behaviour setting The urban development occurs through a process of sustainable urbanization. This process cause urban sprawl that spread until the outer part of the city known as the border area. Urban Sprawl encourage the growth of new sub-service facilities, especially in the border area of Semarang city. Sendang Mulyo village is a settlement that located in the border area of Semarang city and Demak region. Sendang Mulyo village has better urban infrastructure than the settlement in Demak. These conditions cause urban infrastructure serve not only the residents itself but also those who live outside of Semarang city. These phenomena is shape the urban infrastructure spreading characteristics in the border area. This article presents research in analysing 15 shaping factors of urban infrastructure spreading characteristics in the border area, in this case Sendang Mulyo Settlements Semarang City. Based on the results of this research which was conducted through positivistic paradigm and quantitative approach shows that the urban infrastructure spreading characteristics in the border area of Semarang city influenced by human aspect of the behaviour setting Diponegoro University 2018-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/12738 TEKNIK; Vol 39, No. 2 (2018): Desember 2018 eng Copyright (c) 2019 Teknik

oai:ojs.ejournal.undip.ac.id:article/1894 2012-02-24T10:20:44Z teknik:ART

2460-9919 0852-1697 dc PROSEDUR PERENCANAAN UNTUK KAPAL-KAPAL IKAN BERUKURAN KECIL Sugeng, Sunarso small fishing boat. Design procedure of small fishing vesels, to develop a fishing boat was required the specification datas. Thespecification datas consist of compile planning stages, steps start from picture planning, fabrication,assembling, erection. Specificaton of picture planning process and ship have to be adapted for generalconditions of the ship type to be woke up. To get result of good planning to be required by detailed data fromship to be made by considering: how big wanted of the ship size measure,or which is the value of Vfh/▼ ( m3 /ton),where is the ship will be operated, what the the kind of fishing gear will be supported to the ship how longtime will be needed,is required in once operate for, and others. This matter is meant to get result of planningmatching with wanted ship type, is later;then conducted by calculation and result is poured in the form of shipplanning pictures Diponegoro University 2012-02-15 10:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1894 TEKNIK; Volume 30, Nomor 3, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/38285 2025-07-07T19:35:10Z teknik:ART

"220531 2022 eng " 2460-9919 0852-1697 dc Analysis of the Remaining Service Life of Flexible Pavement Based on Damage Prediction with MEPDG Method and Prediction of Pavement Condition Values Cahyono, Muhammad Wardan B. Balai Pengembangan Jasa Konstruksi, Dinas PUPESM, Pemda DIY Suparma, Latif Budi Departemen Teknik Sipil dan Lingkungan, Universitas Gadjah Mada http://orcid.org/0000-0003-4960-4019 Mulyono, Agus Taufik Departemen Teknik Sipil dan Lingkungan, Universitas Gadjah Mada remaining service life, pavement distress prediction, PCI value prediction, MEPDG Nilai sisa masa layan (Remaining Service Life/RSL) perkerasan dapat digunakan untuk membantu dalam menentukan waktu pekerjaan pemeliharaan yang tepat. Penelitian ini bertujuan untuk menganalisis nilai sisa masa layan perkerasan lentur berdasarkan prediksi kerusakan yang terjadi dengan menggunakan metode MEPDG dan berdasarkan prediksi kondisi kinerja perkerasan dengan nilai Pavement Condition Index (PCI). Tiga ruas jalan di D.I. Yogyakarta digunakan sebagai objek penelitian, yaitu ruas jalan Milir-Sentolo, Pakem-Prambanan, dan Arteri Utara Barat. Prediksi sisa masa layan perkerasan dihitung berdasarkan prediksi besaran kerusakan. Jenis kerusakan yang diprediksi adalah rutting, alligator cracking, dan longitudinal cracking. Nilai respon perkerasan diperoleh dari hasil analisis menggunakan Program Kenpave dengan input data modulus elastisitas material masing-masing lapisan. Hasil analisis menunjukkan, ruas jalan Pakem-Prambanan mempunyai sisa masa layan terpanjang baik berdasarkan prediksi kerusakan perkerasan (³ tahun ke-14), maupun prediksi nilai PCI (tahun ke-7). Hal ini disebabkan karena ruas ini melayani lalulintas paling kecil dibandingkan lainnya. Diponegoro University 2022-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/38285 TEKNIK; Vol. 43, No. 1 (2022): May 2022 ind Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/7047 2014-12-24T02:09:48Z teknik:ART

"141010 2014 eng " 2460-9919 0852-1697 dc PENGARUH VARIABEL OPERASI PADA PROSES MODIFIKASI PATI GARUT DENGAN METODE CROSS LINKING PENGGANTI TEPUNG TERIGU SEBAGAI BAHAN BAKU PADA INDUSTRI BAKERY Rakhmawati, Putri Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, 50275 Octaviani, Risa Dwi Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, 50275 Santosa, Herry Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, 50275 Array [Title: Operating Variables Effects on Process Modification of Arrowroot Startch by Cross Linking Method for Substituting Wheat Flour as Bakery Industry Raw Material] Arrowroot starch is local food comodity that has potential for many use.The advantage of arrowroot starch are free gluten and low glisemic index. But, arrowroot starch has disadvantage swelling power and solubility doesn’t criteria. In this study, an attempt is made to change the arrowroot starch raw material for bakery industry by using cross-linking methods. The purpose of this research is to study the effect of reaction temperature, reaction time, and volume gingerol of swelling power and solubility. To achieve the goal of research through three stages: (1) The characteristic of arrowroot, (2) The phase of modified arrowroot starch with method Cross Linking is done to change the properties of arrowroot starch in accordance with the specification qualify as bakery industry raw materials, (3) Analysis phase to modified arrowroot starch products which include swelling power and solubility. To achieve swelling power and solubility for raw material bakery industry, cross linking process to Arrowroot strach better are reaction temperature at 400C, reaction time at 90 minutes and oleoresin volum at 0,3 ml.   Diponegoro University 2014-10-20 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/7047 TEKNIK; Vol 35, No 1 (2014): (July 2014) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1939 2012-08-08T06:08:30Z teknik:ART

2460-9919 0852-1697 dc PENGOLAHAN DATA GEOLISTRIK DENGAN METODE SCHLUMBERGER Broto, Surdaryo Sera Afifah, Rohima Geophysics, Georesistivity. Geophysics is a knowledge that concern about structural and composition in subsurface. Geophysicshas some methods to explore subsurface condition which are: seismic, gravity, geomagnetic,georesistivity, georadar and well logging. Georesistivity is one of geophysics method that focused inresistivity properties in the earth. Georesistivity has some methods which are telluric resistivity,magnetotelluric, electromagnetic, IP (Induced polarization), resistivity. Resistivity can be divided intoHorizontal Profilling (HP) and Vertical Electrical Sounding (VES). Georesistivity is used for shallowinvestigation effectively. Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1939 TEKNIK; Volume 29, Nomor 2, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/42496 2023-01-24T23:37:53Z teknik:ART

"221229 2022 eng " 2460-9919 0852-1697 dc Properties of Thermal Conductivity Hybrid Epoxy Resin Composite Reinforced Natural Fiber as Alternative Insulator Material Suarsana, Ketut Program Studi Teknik Mesin, Fakultas Teknik, Universitas Udayana, Jl. Raya Kampus Unud Jimbaran, Kabupaten Badung, Bali, Indonesia 80361 Negara, DNK Putra Program Studi Teknik Mesin, Fakultas Teknik, Universitas Udayana, Jl. Raya Kampus Unud Jimbaran, Kabupaten Badung, Bali, Indonesia 80361 Suryawan, Igpagus Program Studi Teknik Mesin, Fakultas Teknik, Universitas Udayana, Jl. Raya Kampus Unud Jimbaran, Kabupaten Badung, Bali, Indonesia 80361 Composite; NaOH; Silane; Thermal conductivity The properties of composite materials are highly dependent on the constituents used as reinforcement such as natural fibers with a matrix. This research was conducted to determine the effect of chemical solution treatment of NaOH and Silane coupling agent on fiber with concentration on thermal conductivity properties. The research involved processing fiber from nettle plant by decortication to obtain a single fiber. The hybrid composite process uses the hand lay-up molding method. The fibers were treated with a chemical solution of NaOH and Silane at concentrations of: 3 and 6% for 2 hours, had a length of 5 mm, and in random orientation. The ratio of the nettle fiber reinforced resin matrix to the weight ratio of natural fibers was 10, 15, 20 and 25%. The results obtained that the highest thermal conductivity properties with a fiber composition of 25% in the chemical solution treatment of 6% Silane of 0.1995 Watt/moK. On the other hand, the lowest with a composition of 10% natural fiber with 3% NaOH treatment of 0.1099 Watt/moK. The low thermal conductivity of hybrid composites can be applied as an insulator Diponegoro University 2022-12-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/42496 TEKNIK; Vol. 43, No. 3 (2022): December 2022 eng Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/8715 2016-01-07T04:04:12Z teknik:ART

"151210 2015 eng " 2460-9919 0852-1697 dc ROLE OF COLOR TO SUPPORT THE ACHIEVEMENT OF RELAXATION IN BUSSINES HOTEL (CASE STUDIES OF BUSINESS HOTEL IN SEMARANG) Elsosan, Adel Issa Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang, Pandelaki, Edward E. Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang, Murtini, Titin Woro Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang, peran warna; relax; bisnis hotel; role of color; relaxation; business hotel Semarang sebagai pusat bisnis dan pariwisata di Jawa Tengah memberikan kesempatan bagi investor untuk berinvestasi di Semarang. Akhir-akhir ini bisnis perhotelan di Kota Semarang menunjukkan prospek cerah. Hal ini dapat dilihat dari meningkatnya jumlah wisatawan yang menginap di hotel. Salah satu alasannya adalah banyak kegiatan seperti pertemuan yang diselenggarakan oleh instansi pemerintah, baik lokal maupun nasional, yang diselenggarakan di kota Semarang. Berdasarkan hasil survei awal, sebagian besar hotel di Semarang masih minim fasilitas dan tidak berlaku pentingnya pelaksanaan warna bagi pengunjung. Studi tentang peran warna untuk mencapai relaksasi ini penting karena jika relaksasi mencapai sehingga manusia dapat membuat lebih konsentrasi dan merasa menyegarkan. Tujuan dari penelitian ini adalah: Studi tentang bagaimana warna mempengaruhi dalam penciptaan relaksasi di hotel bisnis di Semarang. Sampel penelitian diarahkan ke hotel menggunakan warna dingin dan hotel warna hangat di Semarang. Metode analisis yang digunakan adalah analisis deskriptif. Berdasarkan hasil dan analisis, kesimpulan dalam penelitian ini adalah: (1) Warna dalam menciptakan relaksasi sangat penting bagi responden dan kedua warna dingin dan warna hangat dapat membuat dan menciptakan relaksasi. (2) Hal-hal yang mempengaruhi pemilihan warna untuk meningkatkan bisnis hotel adalah tujuan untuk tinggal di hotel, pertimbangan ini untuk bekerja dan nilai pribadi seperti liburan, juga relaksasi. [Title: Role of Color to Support The Achievement of Relaxation in Bussines Hotel (Case Studies of Business Hotel in Semarang)] Semarang as a business and tourism hub in Central Java provides an opportunity for investors to invest in Semarang. Lately the hospitality business in the city of Semarang show bright prospects. It can be seen from the increasing number of tourists who stay at the hotel. One reason is that many activities such as meetings held by government agencies, both local and national, held in the city of Semarang.Based on the results of the initial survey, most hotels in Semarang still minimal facilities and do not apply the importance of the implementation of color for visitors. Study about role of color to achieve relaxation is important because if the relaxation achieve so human can make more concentration and feel refresh. The aim of this study is: Study about how colors influence in creation of relaxation in business hotel in Semarang. The research sample is directed to the hotel using a cool color and a warm color hotel in Semarang. The method analysis used is descriptive analysis. Based on the result and analysis, the conclusion in this research are: (1) Thecolor in creating relaxation is very important for the respondent and both cool color and warm color can make and creating relaxation. (2)The things that affect the selection of colors to enhance the hotel business is for the purpose to stay in hotel, the consideration is for work and personal value such as holiday, also the relaxation.   Diponegoro University 2015-12-09 12:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/8715 TEKNIK; Vol 36, No 2 (2015): (December 2015) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1726 2012-02-10T06:41:42Z teknik:ART

2460-9919 0852-1697 dc PENGENALAN TEKNOLOGI RADAR UNTUK PEMETAAN SPASIAL DI KAWASAN TROPIS Haniah, Haniah Prasetyo, Yudo Mapping, Radar, SAR, Sensor, Tropical For tropical areas that often cloudy and experiencing rain, sensors based on optical satellite remote sensingoften encounter difficulties. This sensor is not able to optimally imaged region of interest due to clouds and rainobscured. Instead of wave-based sensor that uses microwave active sensors such as Radio Detection andRanging (RADAR) has advantages capable mencitra in various weather conditions, day and night, includingcoverage through the thick clouds and rain. Therefore, the radar system can help assess the level of physical andnon physical damage a wider area in quick time so that the scale of regional management priorities can bedetermined effectively and efficiently. Ability of SAR to penetrate clouds, covering the surface of the earth withtheir own signals, and can accurately measure distances, making the SAR is used for various applications, suchas: Monitoring of ice at sea, cartography, surface deformation detection, monitoring of glaciers, food cropproduction forecasting, mapping forest, ocean wave spectral, city planning, monitoring, disaster monitoring andshoreline Diponegoro University 2012-02-02 14:48:56 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1726 TEKNIK; Volume 32, Nomor 2, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/27252 2020-10-05T04:53:56Z teknik:ART

"200831 2020 eng " 2460-9919 0852-1697 dc Hambatan Signifikan Implementasi Sistem Manajemen Mutu Pelaksana Konstruksi Willar, Debby Departemen Teknik Sipil, Politektnik Negeri Manado http://orcid.org/0000-0003-2006-5664 Pangemanan, Daisy Debora Grace Departemen Teknik Sipil, Politektnik Negeri Manado significant barriers; QMS development; QMS implementation; quality system; contractor Penerapan sistem mutu/ sistem manajemen mutu (SMM) pada penyelenggaraan konstruksi telah menjadi salah satu persyaratan bagi para kontraktor agar layak mengikuti pelelangan proyek-proyek infrastruktur di Indonesia. Seiring upaya para BUJK kualifikasi K, M, dan B mengembangkan dan menerapkan sistem mutu secara efektif, masih terdapat hambatan yang mengakibatkan sistem mutu perusahaan kontraktor belum maksimal diterapkan sehingga belum menerima manfaat yang maksimal pula. Studi ini bertujuan mengevaluasi hambatan-hambatan yang signifikan dialami oleh para BUJK kualifikasi K, M, dan B dalam menerapkan sistem mutu/SMM ISO 9001, serta mengevaluasi jika terdapat perbedaan hambatan yang signifikan. Metodepenelitian yang digunakan adalah kuantitatif menggunakan survei kuesioner, yang melibatkan 102 profesional BUJK di daerah Provinsi Sulawesi Utara. Hasil studi memaparkan dalam masa satu dekade menerapkan sistem mutu, perbeadaan hambatan yang signifikan diantara ketiga kualifikasi kontraktor yaitu, kontraktor K memahami SMM sebatas memenuhi persyaratan pelanggan proyek, dan pemeriksaan mutu berkala proyek yang sementara dikerjakan belum sesuai dengan prosedur. Kontraktor M mengalami kendala atas komitmen manajemen untuk menyediakan biaya khusus pengembangan SMM, biaya pelatihan dan promosi, dan kendala mengendalikan kegiatan proyek agar memenuhi target waktu dan biaya. Kontraktor B tidak mengalami hambatan signifikan penerapan SMM, namun berupaya agar penerapan SMM bermanfaat mengurangi biaya operasional. Hasil studi bermanfaat bagi para BUJK untuk menetapkan strategi dan skala prioritas dalam mengatasi hambatan, serta secara bersama-sama saling koordinasi untuk meminimalisir hambatan implementasi SMM Diponegoro University 2020-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/27252 TEKNIK; Vol 41, No. 2 (2020): August 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2116 2012-02-23T04:26:32Z teknik:ART

2460-9919 0852-1697 dc PEMBUATAN BIODIESEL DARI MINYAK GORENG BEKAS DENGAN PROSES CATALYTIC CRACKING Buchori, Luqman Widayat, Widayat biodiesel, ex-cooking oil, catalytic cracking, natural zeolite Crude oil is a source of energy which is not be renewable. This fact motivates so much countries ineconomizing on fuel. Many researches have been done to gets another fuel substitute the crude oil.Biodiesel is represented as fuel instead of diesel fuel, and it is produced from vegetable oil. In the otherside, ex-cooking oil is waste-product from food industry, restaurant and household which is potential tobe alternative fuels because of the high contents of carbon and hydrogen atoms. Commonly the biodieselmade from vegetable oil by esterification and transesterification process. But if using esterification andtransesterification process to ex-cooking oil material, it is not economically feasible because the processmakes another reaction between alkaly catalist and oil to produce soap. One of biodiesel process iscatalytic cracking of the ex-cooking oil. This research is aimed to analyze zeolite catalist size effect(0.125mm; 0.3375mm; 0.425mm; 0.85mm; 1.18mm), and acid concentration on the product (2N; 3N;4N). This result shows that at 4N acid concentration and 0.125 mm zeolite catalist size is optimal whichcan reach diesel specification. Diponegoro University 2012-02-10 11:25:01 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2116 TEKNIK; Volume 28, Nomor 2, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/58024 2024-01-16T21:44:16Z teknik:ART

"231208 2023 eng " 2460-9919 0852-1697 dc Multi-Factor Optimization of Natural Rubber Formula for Friction of Natural Rubber Elastomer Material for Prosthesis Sole Applications Khafidh, Muhammad Teknik Mesin, Universitas Islam Indonesia Irfan, Afi Muhammad Suryawan, Donny Kistriyani, Lilis Ismail, Rifky foot prosthesis; natural rubber; silica powder; Taguchi Method; friction Indonesia merupakan negara penghasil karet alam terbesar ke-2 di dunia. Berbagai produk dapat dibuat dengan bahan dasar karet alam, salah satu aplikasi produk yang dapat diproduksi dari karet alam adalah telapak kaki prostesis. Salah satu kriteria penting pada telapak kaki prostesis adalah nilai gaya gesek besar agar produk tidak licin saat digunakan. Penelitian ini mempelajari optimasi formula karet alam untuk mendapatkan nilai gaya gesek terbesar. Tribometer pin-on-disk digunakan untuk mendapatkan nilai gaya gesek. Metode optimasi yang digunakan adalah Metode Taguchi Orthogonal Array L9, sedangkan kontribusi setiap kontrol faktor terhadap kenaikan nilai gaya gesek dilakukan menggunakan analisis ANOVA. Faktor kontrol yang digunakan pada penelitian ini berjumlah empat, yaitu jenis natural rubber, persentase silica powder, persentase sulfur, dan temperatur vulkanisasi. Masing-masing faktor kontrol mempunyai tiga level yang berbeda. Hasil pengujian menunjukkan bahwa formulasi optimum untuk mendapatkan nilai gaya gesek tertinggi adalah jenis campuran natural rubber/lateks pekat dan natural rubber/lateks instan, pengisi silica powder 30 phr, sulfur 5 phr, dan temperatur vulkanisasi 150°C. Peningkatan gaya gesek yang dihasilkan oleh formulasi optimum tersebut adalah 33% dibandingkan dengan formulasi baseline. Analisis ANOVA menunjukkan bahwa faktor temperatur vulkanisasi menjadi faktor yang terpenting dalam meningkatkan nilai gaya gesek dengan persentase kontribusi sebesar 62,58%. Diponegoro University 2023-12-08 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/58024 TEKNIK; Vol. 44, No. 3 (2023): December 2023 ind Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/12613 2020-04-17T09:32:37Z teknik:ART

"161231 2016 eng " 2460-9919 0852-1697 dc Keakuratan Prediksi Inflow Waduk Dengan Neraca Air Waduk Wulandari, Dyah Ari Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Budieny, Hary Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Kurniani, Dwi Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, inflow waduk; neraca air waduk; tingkat akurasi; reservoir inflow; reservoir water balance; accuracy level Dalam perhitungan inflow waduk sering digunakan persamaan neraca air waduk yang menggunakan data seri laporan harian operasi waduk, evaporasi dan curah hujan diwaduk, dan lengkung H-V-A waduk. Pada pengamatan data series laporan harian operasi waduk dan pengukuran kapasitas tampungan waduk, dapat terjadi kesalahan yang disebabkan karena kesalahan faktor manusia maupun faktor alat, hal ini akan menyebabkan kesalahan pula pada besarnya inflow waduk yang dihasilkan. Lebih lanjut di dalam perencanaan, data series inflow waduk ini diperlukan sebagai input pada pemodelan optimasi operasi waduk dan sedimentasi waduk, sehingga keakuratan datanya sangat diperlukan. Tujuan penelitian ini adalah untuk mengevaluasi tingkat akurasi penggunaan neraca air waduk dalam memprediksi inflow waduk. Untuk mengetahui tingkat akurasi dilakukan dengan membandingkan antara inflow waduk dari anak sungai hasil pengukuran dan hasil hitungan dengan persamaan neraca air waduk. Kemudian dilakukan variasi periode pengukuran dan kurva H- V-A yang digunakan. Berdasarkan penelitian yang dilakukan maka pada periode perhitungan yang lebih lama menghasilkan tingkat error yang lebih kecil. Pemakaian kurva waduk yang berbeda menghasilkan inflow yang berbeda. Tingkat error yang didapat masih cukup besar, diatas 30 %, sehingga perhitungan inflow waduk dari anak sungai dengan menggunakan metode neraca air waduk kurang akurat.  [Title: Accuracy of Reservoir Inflow Prediction Using Reservoir Water Balance] In the calculation of reservoir inflow often used reservoir water balance equation using the data series of daily reports reservoir operation, evaporation and precipitation, and H-V-A curve. In observation of the data series of daily reports of reservoir operation and measurement of reservoir storage capacity, the errors may occur due to human error factor and factor appliance. This will cause an error on the reservoir inflow generated. Further, in the planning, this series data of reservoir inflow is required as input to the modeling of reservoir operation optimization and reservoir sedimentation, so the accuracy of the data are required. The purpose of this study was to evaluate the use of the reservoir water balance accuracy rate in predicting inflow. To determine the level of accuracy, the effort is done by comparing the inflow tributary reservoirs of measurement and the count with the reservoir water balance. Then perform variations of the measurement period and curves H-V-A is used. Based on the research conducted in the period longer calculation produces a smaller error. The different H-V-A curve results in the different inflow. Error rate obtained is still quite large, above 30%, so the calculation of tributary inflow reservoirs using reservoir water balance method is less accurate.    Diponegoro University 2016-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/12613 TEKNIK; Vol 37, No 2 (2016): (Desember 2016) eng Copyright (c) 2016 Teknik

oai:ojs.ejournal.undip.ac.id:article/1762 2012-02-10T07:59:26Z teknik:ART

2460-9919 0852-1697 dc ANALISA KINERJA KEMUDI KAPAL “MV SIRENA“ PADA PELAYARAN PERCOBAAN KAPAL BARU Utomo, Budi Sea Trial and Manouvering. Every ship building to the after constructed should be done sea trial, it is intended to find out all machinery andequipment in the ship to run well and deserve to normal weather conditions in accordance with the plan. Themain purpose of this study is to know the performance of steering ship MV. SIRENA in sea trial on new ship,because in the operation of a vessel, the steering has a very important role is to ship control or shipmanouvering. After doing sea trial produced several motion graphics board. To ship left spinning PS tacticaldiameter DT = 114,4120 meter and advance = 157,3716 meter, while rotating to the right to ship SB tacticaldiameter DT = 120,9048 meter and advance = 161,9024 meter. There is a difference of 120,9048 – 114,4120 =6,4928 meter in tactical diameter for PS, and 161, 9024 - 157, 3716 = 4,5308 meter in advance, which meansthat the ship sailed round the larger right and left to right, this is due to spin the propeller rotation is right theship sailed toward him continue in the direction of nuts bolts, steering performance of the experimental results ofthe MV. SIRENA after the sea trial, then matched with the demand for ship owners and ship classificationagency, the steering performance of the new ship MV SIRENA can run well which means it can be accepte,because The resulting DT = 6,4928 meter still within the recommended limit is within their rules that is DT =3,45 - 7,50 meter. Diponegoro University 2012-02-02 14:46:02 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1762 TEKNIK; Volume 31, Nomor 2, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/30978 2021-06-03T02:06:55Z teknik:ART

"210506 2021 eng " 2460-9919 0852-1697 dc The effect analysis of the stiffness changes of a Traditional Fishing Boat Foundation on Vibration Amplitude Lekatompessy, Debby Raynold Program Studi Teknik Perkapalan Fakultas Teknik, Universitas Pattimura http://orcid.org/0000-0003-3869-0943 stiffness; outboard engine; numerical method; damping; vibration. The ship with the outboard engine is intended to make it easier for fishers to operate and maintain. However, the magnitude of the vibration due to the excitation of the engine during operation adversely affects the surrounding structures. It is evidenced by measuring the vibration amplitude of more than 0.02 mm at several points around the ship engine foundation. This study aims to reduce these vibrations by changing the canal's dimensions as a foundation and using damping rubber as the simplest solution. The analysis was carried out by calculating the vibration parameters of 2 types of machines, SR1110 and S1100. The numerical method is used to calculate the vibration's amplitude by varying the value of channel stiffness and rubber damping on the machine foundation. Supporting data is obtained by measuring the vibration amplitude at several points around the foundation. The magnitude of the previous vibration amplitude is 0.078 mm for the SR1110 type and 0.069 mm for the S1100 type, which exceeds the limit still. The amplitude is reduced by changing the foundation's dimensions and using a rubber damper (c). With the new foundation dimensions, the amplitude for the diesel engine type SR1110 becomes 0.0245 mm and type S1100 becomes 0.0238 mm. Increased stiffness and the addition of rubber succeeded in reducing the vibration amplitude by a significant value. The amplitude was reduced by 69% for the SR1110 engine type and 65% for the S1100 engine type within the allowable limit of less than 0.02 mm to 0.03 mm based on Barkan's observation results. Diponegoro University 2021-05-03 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/30978 TEKNIK; Vol. 42, No. 1 (2021): May 2021 eng Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4389 2013-01-22T02:50:02Z teknik:ART

"121015 2012 eng " 2460-9919 0852-1697 dc OPTIMALISASI SISTEM PENGELOLAAN SAMPAH DI LINGKUNGAN KAMPUS UNIVERSITAS DIPONEGORO: UPAYA MENUJU UNDIP ECO-CAMPUS Wiharyanto, Oktiawan Titik, Istirokhatun Nur, Fajar S. S Array Diponegoro University as a leading institution of higher education in Central Java is expected to be a pioneer and an example in terms of waste management. But in fact now has Undip not have an adequate system of waste management. Current conditions almost all existing studies program has been concentrated in the campus area Tembalang still treats conventional waste by dumping it in the trash is mixed with and without prior sorting which will eventually increase the weight of the existing TPS and TPA. This makes the system of waste management in the UNDIP really need to be evaluated and reviewed. This study dimaksudakan to optimize waste management system with the principles of the 3R (reuse, reduce, recycle) in order to minimize the waste problem. Besides this optimization also as an effort to realize the vision of the university Undip as environmentally friendly (eco-campus) and a role model for waste management agencies and other institutions Diponegoro University 2012-07-12 10:30:29 https://ejournal.undip.ac.id/index.php/teknik/article/view/4389 TEKNIK; Volume 33, Nomor 2, Tahun 2012 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/59200 2025-04-17T01:00:52Z teknik:ART

"241230 2024 eng " 2460-9919 0852-1697 dc Comparative Study of Marshall Properties and Durability of Superpave Pavements Using Pen 60/70 and Starbit Pg-70 Binding Materials with Fly Ash Rahman, Indriasti Yustika Civil Engineering Master's Program, Faculty of Civil Engineering and Planning, Indonesian Islamic University, Jl. Kaliurang, No. Km.14 Sleman Regency, Yogyakarta, Indonesia 55584 https://orcid.org/0009-0004-5585-414X Superpave, Fly Ash, Pen 60/70, Starbit Pg-70 The challenges of increasing vehicle volume and extreme loads need to be anticipated through pavement materials, both for gradations and bonding materials. This paper presents a comparative study of Marshall properties and durability of Superpave pavements using Starbit Pg-70 and Pen 60/70 binder materials with Fly Ash substitution. The laboratory experiment begins with physical testing of aggregate and bitumen materials, then determines of optimum bitumen content for each of the mixture with 0%, 50%, and 100% substitution for each type of binding material. A series of tests are carried out in the form of Marshall Standards and Index of Retained Strength (IRS), Indirect Tensile Strength (ITS), Tensile Strength Ratio (TSR), and Wheel Tracking at each optimum bitumen content.  The results show that, in general, the use of Starbit Pg-70 binder has much better Marshall performance in terms of stability and Marshall quotient. Substitution of Fly Ash as Filler is also able to improve mechanical performance, with the advantage of increasing the value of Marshall Stability. Fly Ash fills the voids, so it has strong interlocking properties. Diponegoro University 2024-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/59200 TEKNIK; Vol 45, No 3 (2024): December 2024 eng Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/10565 2020-04-17T09:35:27Z teknik:ART

"180731 2018 eng " 2460-9919 0852-1697 dc ANALISA PENGARUH CENTERBULBS TERHADAP HAMBATAN DAN VERTICAL MOTION PADA KAPAL CATAMARAN Aprijal, Rahmat Prio Departemen Teknik Perkapalan Fakultas Teknik, Universitas Diponegoro Samuel, Samuel Departemen Teknik Perkapalan Fakultas Teknik, Universitas Diponegoro Iqbal, Muhammad Departemen Teknik Perkapalan Fakultas Teknik, Universitas Diponegoro Catamaran, Centerbulb, Hambatan, Vertical Motion ABSTRAK Kapal multihull, terutama catamaran adalah kapal yang menarik untuk dikaji. Dalam segi stabilitas catamaran memiliki stabilitas kapal yang lebih baik, tetapi permasalahan yang sering timbul terkait masalah hambatan. Hambatan catamaran lebih kompleks dibandingkan dengan kapal monohull. Permasalahan yang timbul akibat efek interaksi komponen hambatan dan gelombang pada lambung kapal multihull. Dari permasalahan tersebut munculah eksperimen untuk melakukan penambahan centerbulb pada kapal catamaran. Centerbulb berguna untuk mengurangi hambatan yang terjadi pada lambung kapal yang disebabkan interaksi komponen hambatan dan gelombang. Analisa perhitungan hambatan total kapal Catamaran dihitung menggunakan software berbasis CFD yaitu ANSYS v 14.0 dan menggunakan variasi kecepatan pada Fn=0.28, Fn=0.47, Fn=0.65 serta variasi jarak antar lambung pada S/L=0.2, S/L=0.3, dan S/L=0.4. hasil dari penelitian ini didapatkan bahwa, kapal catamaran dengan S/L 0.2 dan penambahan centerbulb adalah kapal yang paling efektif karena dapat mengurangi hambatan sebesar 8-14%, dan kapal tersebut memiliki respon gerakan vertical motion yang memenuhi kriteria dan paling minimum pada kecepatan Fn 0.28. Kata kunci : Catamaran, Centerbulb, Hambatan, Vertical Motion Diponegoro University 2018-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/10565 TEKNIK; Vol 39, No 1 (2018): (July 2018) eng Copyright (c) 2018 Teknik

oai:ojs.ejournal.undip.ac.id:article/1885 2012-02-24T10:20:44Z teknik:ART

2460-9919 0852-1697 dc PENJEJAK OBJEK DENGAN BEBERAPA KAMERA MENGGUNAKAN ALGORITMA THREE STEP SEARCH Sofwan, Aghus object tracking, three step algorithm In this paper we address the development of an object tracking system with multiple fixed cameras usingmotion estimation. Three step search algorithm is used to estimate object movement that across camera. Thisalgorithm will process two frame f(t-1) and f(t), where f(t-1) represents reference image, and f(t) representscurrent image at one camera to produce motion vectors value. Sequence of images that arrive from cameraswill be analyzed, then motion vectors and number of moving blocks are obtained. The motion vectors implythat object is moving to right, left, up, or down. Multiple cameras are placed as nodes in a map area havingcardinal coordinate. View direction of each camera according cardinal coordinate is whether south, east,north, or west. Based on motion vectors value and number of blocks that are moving from each camera, ouralgorithm will respond by moving the view from one camera to another, tracking objects that cross the areacovered by cameras. Diponegoro University 2012-02-15 10:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1885 TEKNIK; Volume 30, Nomor 3, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/36031 2021-12-16T21:29:52Z teknik:ART

"211217 2021 eng " 2460-9919 0852-1697 dc Setiawan, Adhi Politeknik Perkapalan Negeri Surabaya https://scholar.google.co.id/citations?user=z_XYZ3MAAAAJ&hl=id&oi=ao Bawafi, Muhammad Iqbal Ali Ramadani, Tarikh Azis Santiasih, Indri Penelitian ini bertujuan melakukan sintesis karbon aktif dari limbah lumpur aktif unit Sludge Drying Bed (SDB) industri gula sebagai adsorben dan efektifitasnya dalam menurunkan kandungan logam berat Cu(II). Proses karbonasi lumpur aktif dilakukan pada suhu 600oC dilanjutkan dengan aktifasi menggunakan asam sulfat 20%. Hasil penelitian menunjukkan bahwa karbon aktif memiliki kadar air, kadar zat yang menguap, dan daya serap I2 telah memenuhi SNI. Hasil SEM menunjukkan bahwa morfologi partikel berbentuk granular dengan ukuran rata-rata partikel sebesar 134,3 μm. Luas permukaan spesifik partikel karbon aktif sebesar 1013,63 m2/g. Pengujian karbon aktif untuk adsorpsi logam Cu(II) menunjukkan bahwa peningkatan waktu kontak adsorpsi akan meningkatkan efisiensi penyisihan Cu(II). Peningkatan konsentrasi awal Cu(II) menyebabkan kecenderungan penurunan efisiensi penyisihan Cu(II). Efisiensi penyisihan maksimum Cu(II) diperoleh pada kondisi waktu kontak 40 menit dan konsentrasi awal Cu(II) 12,5 mg/L dengan nilai sebesar 86,32%. Isoterm Adsorpsi karbon aktif mengikuti persamaan Freunlich. Kinetika adsorpsi karbon aktif pada konsentrasi awal Cu(II) sebesar 6,125 dan 12,5 mg/L mengikuti pseudo orde dua sedangkan pada konsentrasi awal Cu(II) sebesar 25 dan 50 mg/L mengikuti pseudo orde satu. Diponegoro University 2021-12-17 04:29:52 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/36031 TEKNIK; Vol 42, No. 3 (2021): December 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/6983 2014-12-24T02:20:43Z teknik:ART

"131202 2013 eng " 2460-9919 0852-1697 dc KOMPARASI NILAI FAKTOR AMPLIFIKASI TANAH DENGAN PENDEKATAN SSA DAN HVSR PADA WILAYAH KECAMATAN TEMBALANG KOTA SEMARANG Partono, Windu Staf Pengajar Jurusan Teknik Sipil Fakultas Teknik Undip Irsyam, Masyhur Institut Tenologi Bandung R.W, Sri Prabandiyani Staf Pengajar Jurusan Teknik Sipil Fakultas Teknik Undip Maarif, Syamsul Badan Nasional Penanggulangan Bencana Array Several methods for evaluating the effect of site specific condition of soil layers against earthquakes are presently available. Site Specific Analysis (SSA) and Horizontal-to-Vertical Spectral Ratio (HVSR) are two methods commonly used for estimating the amplification factor of soil layers above bedrock. SSA can be performed using subsurface shear wave velocities and dynamic soil properties (density, shear modulus and damping). The HVSR is a simple method for estimating the site amplification factor. Based on the time and budget requirement HVSR is more efficient and effective compare to SSA method.This paper presents result of SSA and HVSR methodscomparison for estimating the amplification factor of soil layers. Two boring locations and six single station seismometer tests were perform within Tembalang District Area. Diponegoro University 2013-12-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/6983 TEKNIK; Volume 34, Nomor 3, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/75074 2025-11-17T01:02:24Z teknik:ART

"251117 2025 eng " 2460-9919 0852-1697 dc Impact Analysis of Land Use on Time Lag and Peak Discharge in the Downstream Area of Sadia Watershed Bima City West Nusa Tenggara using HEC-HMS and SCS-CN Hartawan, I Putu Water Resources Management, Faculty of Civil and Environmental Engineering, Bandung Institute of Technology Jl. Ganesa No. 10. Coblong, Bandung City, West Java, Indonesia, 40132 Siddik, Firmana Water Resources Management, Faculty of Civil and Environmental Engineering, Bandung Institute of Technology Jl. Ganesa No. 10. Coblong, Bandung City, West Java, Indonesia, 40132 Firmana, Ary Water Resources Management, Faculty of Civil and Environmental Engineering, Bandung Institute of Technology Jl. Ganesa No. 10. Coblong, Bandung City, West Java, Indonesia, 40132 Susetyo, Ekanto Wahyudi Water Resources Management, Faculty of Civil and Environmental Engineering, Bandung Institute of Technology Jl. Ganesa No. 10. Coblong, Bandung City, West Java, Indonesia, 40132 Harlan, Dhemi Water Resources Management, Faculty of Civil and Environmental Engineering, Bandung Institute of Technology Jl. Ganesa No. 10. Coblong, Bandung City, West Java, Indonesia, 40132 Handyastono, Bagus PT. INAKKO Internasional Konsulindo, Jl. Kramat Sentiong No. 46, Kramat, Senen, Central Jakarta City, Jakarta, Indonesia, 10450, AS Algoul, Mohammed Al-Ni’mah Tower, Al-Rimal District, Gaza City, Gaza Strip, Palestine P900 land use change; peak discharge; time lag; HEC-HMS modeling; SCS-CN Flood events have frequently occurred in the downstream area of the Sadia Watershed (DAS) in Bima City, West Nusa Tenggara. In recent years, the overflow of the Sadia River has been triggered by land use changes and the impacts of climate change. This study aims to analyze land cover changes in 2015, 2019, and 2022, and to evaluate their impact on flood peak discharge using hydrological simulations, land cover data were analyzed using ArcGis software and integrated with hydrological modeling using HEC-HMS. The Synthetic Unit Hydrograph (HSS) SCS-CN method was used in the simulation with a 25-year return period, following calibration of the Sadia River’s bank full discharge to ensure model accuracy. The simulation results showed an increase in the peak discharge entering the Sadia River, from 156,20 m³/s in 2015 to 164,80 m³/s in 2019, and 167,00 m³/s in 2022. Additionally, the time lag decreased from 445.15 minutes in 2015 to 431.84 minutes in 2019 and 429.88 minutes in 2022. The increase in the Curve Number (CN) value and impermeable area indicates a reduction in soil infiltration capacity due to land conversion. However, climate factors, such as increased rainfall intensity, also contributed to the rise in peak discharge. These findings can serve as a basis for better land use management and emphasize the importance of considering climate factors when designing flood risk mitigation efforts, especially in the face of increasing flood events. Diponegoro University 2025-11-17 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/75074 TEKNIK; Vol 46, No 3 (2025): Juli 2025 eng Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/23050 2020-04-17T09:38:02Z teknik:ART

"191111 2019 eng " 2460-9919 0852-1697 dc Bashit, Nurhadi Prasetyo, Yudo Suprayogi, Andri Pesatnya pertumbuhan penduduk berdampak pada peningkatan pembangunan di setiap wilayah. Hal ini menyebabkan semakin terbatasnya keberaadaan lahan pada suatu wilayah sehingga mendasari perubahan penggunaan lahan. Pembangunan harus mengikuti pada peraturan yang telah dibuat agar tidak menimbulkan masalah seperti terbentuknya lahan kritis. Oleh karena itu, pemantauan penggunaan lahan pada suatu wilayah perlu dilakukan agar pembangunan tidak menimbulkan permasalahan. Artikel ini memuat pemanfaatan metode pengindraan jauh untuk pemantauan penggunaan lahan di Kecamatan Ngaglik, Kabupaten Sleman, Yogyakarta. Metode pengindraan jauh memanfaatkan data citra satelit yang akan dilakukan proses klasifikasi penggunaan lahan. Penelitian ini menggunakan data citra resolusi tinggi SPOT 5 dengan memanfaatkan metode klasifikasi berbasis objek. Klasifikasi dilakukan beberapa tahapan seperti segmentasi, merge, rule-based classification. Penelitian ini menggunakan parameter skala 70 pada proses segmentasi. Berdasarkan resolusi citra, penelitian ini menghasilkan 16 kelas klasifikasi penggunaan lahan. Pengujian akurasi dilakukan untuk melihat akurasi hasil klasifikasi yang telah dilakukan sehingga penelitian ini menghasilkan ketelitian 80%. Oleh karena itu, klasifikasi berbasis objek pada citra SPOT 5 menghasilkan akurasi yang baik. Hasil klasifikasi memperlihatkan di Kecamatan Ngaglik masih didominasi oleh pertanian lahan basah sebesar 21.892.324,90 m2 dan perumahan tidak teratur sebesar 11.596.465,01 m2. Perumahan penduduk memiliki luas setengah dari luas pertanian disebabkan karena Kecamatan Ngaglik terletak berbatasan langsung dengan Kota Yogyakarta Diponegoro University 2019-11-11 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/23050 TEKNIK; Vol 40, No. 2 (2019): Agustus 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/45642 2022-09-19T00:37:33Z teknik:ART

"220831 2022 eng " 2460-9919 0852-1697 dc Mobile Robotic-Arm Development for A Small-Scale Inter-Room Logistic Delivery using 2D LIDAR-guided Navigation Afrisal, Hadha Department of Electrical Engineering, Faculty of Engineering, Universitas Diponegoro, Jl. Prof. Soedarto SH, Tembalang, Semarang, Indonesia, 50275 Nugraha, Ghanis Kauchya Department of Electrical Engineering, Faculty of Engineering, Universitas Diponegoro Nanda, Aan Aria Department of Electrical Engineering, Faculty of Engineering, Universitas Diponegoro Setiyadi, Ahmad Didik Department of Electrical Engineering, Faculty of Engineering, Universitas Diponegoro Toirov, Olimjon Department of Electrical Machine, Tashkent State Technical University, Tashkent City, Uzbekistan 100095 Ismail, Rifky Department of Mechanical Engineering, Faculty of Engineering, Universitas Diponegoro Syafei, Wahyul Amien Department of Electrical Engineering, Faculty of Engineering, Universitas Diponegoro Riyadi, Munawar Agus Department of Electrical Engineering, Faculty of Engineering, Universitas Diponegoro Setiawan, Iwan Department of Electrical Engineering, Faculty of Engineering, Universitas Diponegoro Mobile Robotic Arm; Inter-room Delivery; Mapping and Navigation; Pick and Place This research aims to develop a low-cost mobile robotic arm for an indoor delivery system. Current pandemic and possible future threat of communicable disease become challenging scenarios in developing an unmanned logistic delivery system with a minimum human involvement, especially for inter-room items delivery inside a highly regulated building such as in hospital, clinic, pharmaceutical, foods and beverages industries. In this paper, a prototype of mobile robotic arm is designed to achieve an autonomous level of navigation utilizing a 2D LIDAR with a guided remote monitoring and control of object selections for loading/unloading process. The mobile robotic arm is an integrated robotics system of mobile robot with an attached robotic arm in its body. The base of the mobile robotic arm utilizes a differential-drive wheels configuration equipped with wheels odometry system. The robotic arm is configured of a 4-DoF SCARA-like structure. The 2-dimensional environment map is generated using LIDAR sensor utilizing Hector SLAM method prior to navigation. The autonomous navigation is performed using a 2D LIDAR-based technique by employing an A* algorithm for path planning and tracking mechanism. Experimental works were conducted in a small building environment consisting of some rooms and narrow corridors. The result of experiments show that the prototype of mobile robotic arm can safely and effectively navigate through the testing environment, subsequently to load and unload objects from one room to another room without colliding to objects and obstacles. Diponegoro University 2022-07-04 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/45642 TEKNIK; Vol. 43, No. 2 (2022): August 2022 eng Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/6716 2015-10-17T03:39:04Z teknik:ART

"150704 2015 eng " 2460-9919 0852-1697 dc PERSEPSI INTEGRASI TATA GUNA LAHAN PADA KAWASAN WATERFRONT DEVELOPMENT (Studi Kasus: Kanal Banjir Barat Semarang) Puspitasari, Rizkya Ayu Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang Setioko, Bambang Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang Pandelaki, Edward Endrianto Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang Array Kawasan waterfront merupakan suatu kawasan dinamis yang memiliki kontak fisik dan visual dengan air laut, sungai, danau, dan badan air lainnya. Kawasan ini memiliki potensi tersendiri untuk dikembangkan melalui suatu waterfront development. Sebagai salah satu kanal besar di Semarang, Kanal Banjir Barat dikembangkan menjadi kawasan waterfront yang diberi nama “Semarang New Waterfront” Kawasan ini direncanakan dengan fungsi recreational and historical waterfront. Untuk fungsi rekreasi sudah cukup terpenuhi, namun sayangnya masih terdapat berbagai kekurangan, salah satunya belum ditunjang oleh fasilitas yang memadai. Kurang beragamnya aktivitas yang tercipta serta tidak adanya karakter yang khas juga mempengaruhi minat pengunjung untuk datang. Sedangkan untuk fungsi sejarah belum mampu tercipta. Beragam masalah tersebut diyakini memberi pengaruh terhadap keberhasilan kawasan ini. Penelitian ini bertujuan untuk mengetahui pengaruh integrasi tata guna lahan terhadap keberhasilan “Semarang New Waterfront” development. Metode kuantitatif rasionalistik digunakan dengan pengumpulan data melalui studi literatur, kuesioner, dan observasi lapangan. Analisis data menggunakan analisis statistik dengan uji regresi menggunakan SPSS 21.0 for windows. Hasil penelitian ini menunjukkan terdapat pengaruh integrasi tata guna lahan terhadap keberhasilan Semarang New Waterfront development sebesar 42,4%. [Perception of Integrated Land Use in The Area Waterfront Development (Case Study: West Flood Canal Semarang)] A dynamic area which has physical and visual contact with sea, river, lake, and other water’s bodies is called waterfront. This area has a potency to be developed through waterfront development. As one of big canals in Semarang, West Floodway was developed as a waterfront called “Semarang New Waterfront”. It was planned with the function of recreational and historical waterfront. This area can fulfill the recreational function, but unfortunately there are still some shortages, such as the amount of amenities. The lack of the diversity of activities and unique character also influence people interest to come. Meanwhile, the historical function also can’t be sensed yet. Those problems are believed give impact to the success of this waterfront. This research aims to know the influence of land use integration to the success of “Semarang New Waterfront” development. A quantitative rationalistic method is used with data collection by literature study, questionnaires, and field observations. While the method of data analysis use statistical analysis by regression test using SPSS 21.0 for windows. This research shows that there is influence of land use integration to the success of "Semarang New Waterfront" development as amount as 42.4%.   Diponegoro University 2015-07-04 16:42:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/6716 TEKNIK; Vol 36, No 1 (2015): (Juli 2015) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1689 2012-02-10T07:42:07Z teknik:ART

2460-9919 0852-1697 dc STUDI PENGARUH AERASI DAN RESIRKULASI LINDI TERHADAP LAJU PROSES DEGRADASI SAMPAH PADA BIOREACTOR LANDFILL Syafrudin, Syafrudin Pujianto, Bambang Eko Wahyuni, Sri Eni Sunarni, Dian Monalisa, Monalisa Landfill, waste degradation, aerobic, aeration, leachate recirculation On the conventional landfill, the waste degradation requires a lot of time to make it through and it produces amethane gasfrom a anaerobic which could be dangerous if there is not an optimal processing. On this research,the writer uses 7 experimental reactors, 6 reactors given aeration treatments and leachate recirculation. Thevariations which have done in the research is leachate recirculation debit, namely (10 and 15) ml/minutes andcontinual lacheate’s flowing system and aeration variation, namely (3, 2, and 1)ml/minutes everyday. Theparameter which is measured is the reduction of waste volume, temperature, PH, BOD and COD for weeklyanalysis. The results of the analysis are that the aeration of 1 ml/minutes with leachate resirculation of 15ml/minutes is the best of aeration condition and it can increase the settlement process and reduction of BOD andCOD concentration in a short time of leachate. This reactor can increase the volume reduction as much as 14,14% in six week and it is bigger than control reactor. The concentration reduction of BOD is from 718, 24 mg/lbecomes 88,44 mg/l and the reduction of COD is from 1285,58 mg/l becomes 893,44 mg/l Diponegoro University 2012-02-02 14:47:08 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1689 TEKNIK; Volume 32, Nomor 1, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/24409 2020-07-10T16:18:56Z teknik:ART

"200531 2020 eng " 2460-9919 0852-1697 dc Raharjo, Sonya Hakim Winaningsih, Ima Widayat, Widayat Proses produksi hidrogen melibatkan perpindahan panas dari satu aliran proses ke aliran proses yang lain atau dari aliran utilitas ke aliran proses dan sebaliknya. Hal ini memotivasi untuk dilakukan proses efisiensi energi. Pada siklus sulfur-iodine seksi III, proses dekomposisi HI merupakan bagian penting karena merupakan proses terakhir untuk menghasilkan H2. Beberapa unit peralatan dan unit utilitas yang ada dalam sistem proses ini membutuhkan dan menghasilkan energi yang cukup besar. Ditemukan bahwa beberapa penggunaan sistem energi ini dapat dioptimalkan melalui proses analisis efisiensi energi menggunakan analisis pinch. Peneltian ini menggunakan perangkat lunak HINT untuk melakukan analisa pinch dengan variasi minimum temperature approach (ΔTmin). Hasil analisa menunjukkan bahwa pada ΔTmin 10K diperoleh maximum energy recovery (MER) yang tinggi dan total harga produksi H2 yang paling rendah. Diponegoro University 2020-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/24409 TEKNIK; Vol 41, No. 1 (2020): May 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2074 2012-02-22T03:11:47Z teknik:ART

2460-9919 0852-1697 dc PERANCANGAN AWAL INSTALASI AIR BUANGAN PENDINGIN MENGGUNAKAN MULTISTAGEFLASH RECYLE DISTILLATION (STUDI KASUS PT. INDONESIA POWER PELABUHAN TANJUNG EMAS SEMARANG) Hardyanti, Nurandani Syafrudin, Syafrudin Inri Natalia, Inri Natalia cooling water, oil separator, multistageflash recycle distillation The port of Tanjung Emas Semarang was located at the coast needed more clean water for shipping,industries and the communities. The production process of PLTU Indonesia Power produced waste wateras cooling water that caused thermal pollution. Considering the quality, quantity, and continuity of thatwaste water used as one of alternative source of clean water. It treated using by multistageflash recycleddistillation method. The purpose of this plant to fulfill clean water for shipping and port of Tanjung Emasarea with production capacity was 50 liters per seconds for duration planning about 15 years. The locationof this plant was next to PT. SRIBOGA with area 8000 m2, wherein the intake on the Canal of PLTUIndonesia Power. In order to fulfill the quality of water, this plant used oil separator and antiscalant aspretreatment. Production cost of distillation plant was Rp 13.647 per m3. This cost was too expensive so itrequired to be done crossed subsidy. The price of clean water was Rp 2000 /m3 for public, Rp 5500 per m3for industries and Rp 3000 per m3 for governmental office. Diponegoro University 2012-02-10 11:26:10 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2074 TEKNIK; Volume 28, Nomor 1, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/57004 2023-10-12T21:21:38Z teknik:ART

"230830 2023 eng " 2460-9919 0852-1697 dc Slope Stability Analysis for Slope Geometry Evaluation Using RMR, SMR, and Morgenstern-Price Methods in Pits C2 and C4 of PT Menara Cipta Mulia Mayang Block Open Pit Tin Mine, East Belitung Regency, Bangka Belitung Islands Salsabila, Zulfa Nindya Department of Geological Engineering, Universitas Diponegoro Putranto, Thomas Triadi Department of Geological Engineering, Universitas Diponegoro Najib, Najib Department of Geological Engineering, Universitas Diponegoro engineering geology; open-pit mining; rock mass; slope stability; slope optimization Aktivitas penambangan timah yang dilakukan dengan sistem tambang terbuka dapat membentuk dan mengubah dimensi lereng, sehingga mempengaruhi kestabilan lereng dan meningkatkan adanya risiko terjadinya suatu longsoran. Tujuan penelitian ini adalah untuk mengetahui kondisi geologi teknik, kondisi massa batuan, mencari nilai faktor keamanan lereng dan memberikan rekomendasi geometri lereng menurut kriteria minimum nilai Faktor Keamanan (FK) ≥1,25. Analisis stabilitas lereng perlu dilakukan untuk meminimalisir terjadinya longsor. Daerah penelitian merupakan wilayah dengan material kompleks, sehingga pada penelitian ini analisis kestabilan lereng dilakukan dengan menggabungkan metode klasifikasi massa batuan Rock Mass Rating (RMR) dan Slope Mass Rating (SMR) serta perhitungan nilai Faktor Keamanan (FK) menggunakan metode Morgenstern-Price dengan pendekatan kriteria keruntuhan Generalized Hoek-Brown dan Mohr-Coulomb. Hasil analisis didapatkan tiga zona geologi teknik, yaitu meta batupasir-meta batulempung, batupasir lanauan, dan batulempung pasiran. Kondisi massa batuan menurut nilai RMR termasuk kedalam kelas sedang hingga baik dan memiliki nilai SMR dengan stabilitas stabil sebagian. Daerah yang berpotensi longsor, yaitu STA 2 pada lereng B-B’ tipe longsor jungkiran, serta STA 3 pada lereng C-C’ dan STA 4 pada lereng  D-D’ tipe baji. Menurut nilai FK terdapat 2 lereng tidak stabil saat kondisi jenuh sebagian, yaitu lereng A-A’ dan lereng B-B’. Geometri lereng yang direkomendasikan, yaitu dengan lebar minimal 2/3 tinggi, dimana pada kondisi jenuh sebagian lereng tunggal sudut 35 - 400, tinggi 5 m, dengan lereng keseluruhan sudut 320 dan tinggi 16 m. Pada kondisi kering, sudut lereng tunggal 550, tinggi 6 m dengan lereng keseluruhan sudut 370 dan tinggi 15 m. Diponegoro University 2023-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/57004 TEKNIK; Vol. 44, No. 2 (2023): August 2023 ind Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/35434 2021-05-06T06:54:02Z teknik:EI

"201231 2020 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi back-matter jurnal Teknik Volume 41 Nomor 3 Tahun 2020 yang memuat petunjuk penulisan dan pengiriman artikel jurnal Teknik Diponegoro University 2020-11-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/35434 TEKNIK; Vol 41, No. 3 (2020): December 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1750 2012-02-15T04:03:20Z teknik:ART

2460-9919 0852-1697 dc APLIKASI PENENTUAN PARAMETER TRANSFORMASI LOKAL BATU HIJAU UNTUK SURVEI DAN PEMETAAN AREA TAMBANG PT. NEWMONT NUSA TENGGARA Darmo Yuwono, Bambang Marzuki, Amin Transformation application, Coordinate transformation, Transformation Parameter, Mining survey Most of mining technical activities, especially survey and mapping use local reference system, including inmining area Batu Hijau of PT Newmont Nusa Tenggara. While the data obtained by using GPS measurement,it should be transform from global coordinate system to local coordinatesystem.The process needstransformation parameters to do coordinate transformation. The object of this research is to build anapplication in determining transformation parameters from global system to local system and analyzeparameters of Batu Hijau of PT Newmont Nusa Tenggara. These transformation parameters are then expectedto be used for determining coordinate in local reference. The result can be obtained the most appropriate localparameters of Batu Hijau for surveying and mapping with geometric transformation accuracy.For this reaserch Melodensky Badekas 3D relatively better than Bursa Wolf 3D appropriate geometricaccuracy are SD 0.0919 m; RMSE 0.0322 m for the Melodensky Badekas and SD 0.2506 m; RMSE 0.0322 mfor the Bursa Wolf. Affine 2D relatively better than Helmert 2D are SD 0.3082 m; RMSE 0.0931 m for Affine2D and SD 0.3531 m; RMSE 0.1070 m for the Helmert 2D. Diponegoro University 2012-02-02 14:41:15 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1750 TEKNIK; Volume 31, Nomor 1, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/24800 2021-06-03T02:06:46Z teknik:ART

"210503 2021 eng " 2460-9919 0852-1697 dc Engineering Design, Performance Test and Cost Analysis of Nutrition Mixer Kuala, Seri Intan Pusat Penelitian Teknologi Tepat Guna, Lembaga Ilmu Pengetahuan Indonesia http://orcid.org/0000-0002-9258-9830 Susanti, Novita Dwi Pusat Penelitian Teknologi Tepat Guna, Lembaga Ilmu Pengetahuan Indonesia Siregar, Yusnan Hasani Pusat Penelitian Teknologi Tepat Guna, Lembaga Ilmu Pengetahuan Indonesia Haryanto, Aidil Pusat Penelitian Teknologi Tepat Guna, Lembaga Ilmu Pengetahuan Indonesia Basuki, Galih Riyan Pusat Penelitian Teknologi Tepat Guna, Lembaga Ilmu Pengetahuan Indonesia engineering design; functional design; nutrition mixer; perfomance test; structural design Tujuan penelitian ini adalah merancang bangun alat pencampur nutrisi tanaman pada sistem hidroponik DFT (Deep Flow Technique) yang dilengkapi dengan sistem kendali jumlah zat padat terlarut (TDS, satuan ppm) dan agitator. Tahap kegiatan dimulai dengan melakukan perancangan, konstruksi, pengujian serta analisis biaya. Perancangan terdiri dari perancangan struktural dan fungsional. Hasil perancangan diperoleh dimensi 0,85 m x 0,55 m x 1,550 m, yang terdiri dari sebuah reservoir, sebuah wadah penampung nutrisi A dan nutrisi B yang masing-masing berkapasitas 100 liter dilengkapi dengan agitator yang digerakan dengan motor DC 45 watt. Unjuk kerja sistem elektrik dilakukan untuk memastikan kecukupan nutrisi (TDS) serta ketinggian air dalam reservoir. Pengujian kerataan TDS dan temperatur larutan nutrisi diukur setiap 720 detik dalam rentang 3600 detik pada 5 titik dengan hasil masing-masing memiliki simpangan rata-rata 1,4430%+5% dan 4,9054%+5%. Pengujian penanaman dengan menggunakan alat pencampur pada tanaman pakcoy dan bayam masing-masing 5,95 kg dan 2,5056 kg lebih banyak dibanding tanpa menggunakan alat pencampur. Sedangkan untuk analisis biaya produksi alat pencampur dan diperoleh Rp8.981.019. Dalam analisa biaya penanaman pakcoy dan bayam diperoleh selisih dengan harga pasaran sebesar Rp13.273. Diponegoro University 2021-05-03 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/24800 TEKNIK; Vol. 42, No. 1 (2021): May 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4379 2013-01-22T02:50:02Z teknik:ART

"121015 2012 eng " 2460-9919 0852-1697 dc PERANAN BALING BALING PADA GERAKAN KAPAL Budi, Utomo Array Propellers is part movement propulsion system of the ships wich duty for pushing of the ship at forward movement and towing the body of ship at backward movement. As a part mechanical drive propeller consist of some blade attached to the boss and mounted on the propeller shaft of the axis relationships from the main engine of the ships. Propeller can drive of the ships both forward and backward with by rotating on its axis. To produce forward and backward movement of the ships can be done in two ways namely with use controllable pitch propellers and with use fixed pitch propellers. Diponegoro University 2012-07-12 10:30:29 https://ejournal.undip.ac.id/index.php/teknik/article/view/4379 TEKNIK; Volume 33, Nomor 2, Tahun 2012 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/61831 2025-04-17T01:00:27Z teknik:ART

"240830 2024 eng " 2460-9919 0852-1697 dc Sumiyanto, Sumiyanto Universitas Jenderal Soedirman Muntohar, Agus Setyo Wardani, Sri Prabandiyani Retno Pada injeksi grouting, ukuran kolom grouting merupakan indikator penting untuk mengevaluasi keberhasilan penyebaran dan sementasi grouting. Pada penelitian di laboratorium, pengukuran kolom grouting dapat dilakukan dengan memisahkan antara kolom grouting dan tanah. Namun demikian, metode ini bersifat merusak dan hanya cocok untuk penelitian, sehingga tidak dapat diterapkan di lapangan. Metode resistivitas bersifat tidak merusak dan berhasil digunakan untuk interpretasi formasi batuan dyke. Formasi dyke ini mempunyai kemiripan dengan kolom grouting, sehingga metode resistivitas berpotensi dikembangkan untuk interpretasi ukuran kolom grouting. Berdasarkan pertimbangan tersebut, penelitian dilakukan untuk mengembangkan metode resistivitas sebagai metode interpretasi ukuran kolom grouting. Penelitian dilakukan di laboratorium menggunakan tanah clay shale yang diinjeksi grouting geopolymer. Berdasarkan hasil data pengukuran resistivitas dilakukan inversi untuk menggambarkan profil resistivitas benda uji, menggunakan software Res2dinv. Profil resistivitas pada umur 28 hari menghasilkan interpretasi ukuran kolom grouting yang akurat karena terdapat perbedaan resistivitas yang besar antara tanah dan kolom grouting. Hasil penelitian ini memberikan peluang metode resistivitas untuk kembangkan lebih lanjut sebagai metode interpretasi ukuran kolom grouting dan berpotensi untuk diterapkan di lapangan. Diponegoro University 2024-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/61831 TEKNIK; Vol 45, No 2 (2024): August 2024 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/61831/199547 Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/15797 2020-04-17T09:34:58Z teknik:ART

"171229 2017 eng " 2460-9919 0852-1697 dc Konsep ABG (Academic-Business-Government) dalam Rencana Sistem Industri Berbasis Potensi Daerah Kabupaten Sleman dan Gunung Kidul Bimantio, Muhammad Prasanto Magister Teknik Sistem, Fakultas Teknik, Universitas Gadjah Mada Tontowi, Alva Edy Magister Teknik Sistem, Fakultas Teknik, Universitas Gadjah Mada kawasan industry berbasis potensi daerah; domestic based industry; ABG; salak pondoh; zeolit, biogas Daerah Istimewa Yogyakarta (DIY) mempunyai potensi industri yang cukup tinggi, baik industri kecil, menengah, maupun besar. Namun daya saing produk industri pengolahan di DIY rendah karena beberapa faktor, yakni masih lemahnya keterkaitan antar industri, keterbatasan produksi barang setengah jadi dan komponen di dalam negeri, keterbatasan industri berteknologi tinggi, kesenjangan kemampuan ekonomi antardaerah, serta ketergantungan ekspor pada beberapa komoditas tertentu. Penelitian ini bertujuan untuk membuat rancangan konsep kawasan industri berbasis potensi daerah (Domestic Based Industry/ DBI) menggunakan pendekatan sinergi Academic-Business-Government (ABG). Pendekatan ini dilakukan dengan fokus pada pemanfaatan bahan baku, sumber daya manusia, dan pemenuhan permintaan pasar lokal. Hasil kajian ini menghasilkan tiga konsep kawasan DBI yang diusulkan: (i) pengolahan produk turunan salak pondoh di Turi Sleman, (ii) pengolahan zeolit di Gedangsari Gunungkidul, dan (iii) pengolahan limbah produk biogas di Cangkringan Sleman. Ketiga konsep kawasan industri pengolahan tersebut saling terkait dan akan membentuk jejaring yang terintegrasi mulai dari bahan baku hingga produk, baik dengan industri rancangan baru maupun dengan industri yang sudah ada. Diponegoro University 2017-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/15797 TEKNIK; Vol 38, No 2 (2017): (Desember 2017) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1863 2012-02-15T03:26:54Z teknik:ART

2460-9919 0852-1697 dc PENERAPAN KEBIJAKAN PENJADWALAN ULANG PADA RUANG LINGKUP SINGLE MACHINE UNTUK MEMINIMASI TOTAL TARDINESS (Studi Kasus di PT. Indonesia Steel Tube Works) Nurkertamanda, Denny Fanani, Zaenal Kusuma Wardhani, Anna rescheduling policy, rush order, tardiness, production scheduling, lateness. Customer satisfaction is the most important thing to be considered to keep the customer trust of a productor even of a company. Giving the satisfaction to the customer can be achieved by several ways and on timedelivery product is one of them. It is true that some problems can often occur during that achievement andmay hinder the on time delivery fulfillment. One of the major elements that hold the key role of on timedelivery fulfillment is production scheduling. The implementation of appropriate production schedulingpolicy will determine the accomplishment of on time delivery fulfillment in some ways. This statement isalso works for Indonesia Steel Tube Works Ltd., as a company that always cares about the customersatisfaction on quality and on time delivery. If we observe the production scheduling records of IndonesiaSteel Tube Works Ltd. we can find some lateness problems that in some case happened in an extensiveinterval of tardiness. The company only runs the production scheduling based on the group of pipediameter. This policy seems cannot well handle the rush orders that often emerge on every schedulingperiod and effect in tardiness problems. The company needs to consider the rescheduling policy with theaim of reducing the tardiness that often emerges because of the rush order disruption. Diponegoro University 2012-02-02 14:36:47 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1863 TEKNIK; Volume 30, Nomor 2, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/33970 2021-12-16T21:29:52Z teknik:ART

"211217 2021 eng " 2460-9919 0852-1697 dc Wardani, Agata Dita Riyadi, Slamet Pratomo, Leonardus Heru Setiawan, Florentinus Budi Penggerak listrik banyak digunakan pada kendaraan listrik, sebagai contoh adalah switched reluctance motor (SRM). SRM memiliki keunggulan seperti: kontruksi sederhana, perawatan mudah, performa tinggi, dan ramah lingkungan. Pengoperasian SRM membutuhkan kendali dan sensor. Deteksi posisi rotor umumnya menggunakan sensor hall effect yang akan menentukan interval eksitasi. Proses ini memiliki banyak kelemahan salah satunya adalah kepresisian. Peletakan sensor hall effect secara geometris memiliki kelemahan mencakup akurasi serta membatasi dalam pemberian eksitasi. Kelemahan peletakan sensor hall effect diantisipasi dengan rotary encoder sebagai deteksi posisi rotor. Alat tersebut memiliki tingkat kepresisian yang tinggi dan dapat mengatur sudut yang diperlukan agar lebih akurat dalam operasi SRM. Pemberian sudut eksitasi dapat dilihat dari karakteristik induktansi SRM. Sudut eksitasi yang tepat dapat menghasilkan torka optimum dan memaksimalkan kinerja SRM. Tujuan penilitian ini guna meningkatan efisiensi SRM menggunakan pergeseran sudut fasa eksitasi stator. Untuk mendukung hasil kajian dilakukan simulasi dan divalidasi dengan pengujian laboratorium. Hasil kajian menunjukkan kondisi optimal pada sudut θon= 5° θoff =20° menghasilkan arus puncak 1,2 A dan kecepatan 1650 RPM. Dari hasil tersebut diperoleh peningkatan efisiensi kinerja dengan pergeseran sudut fasa SRM terhadap torka, kecepatan dan arus yang dihasilkan. Diponegoro University 2021-12-17 04:29:52 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/33970 TEKNIK; Vol 42, No. 3 (2021): December 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/6568 2014-12-24T02:20:43Z teknik:ART

"131202 2013 eng " 2460-9919 0852-1697 dc KAJIAN PEMODELAN ARUS DAN SEDIMEN DI SEKITAR JETTY MUARA SUNGAI Parmantoro, Priyo Nugroho Staf Pengajar Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro Array The use of models in the design of jetties at the river mouth is intended to achieve efficiency and predict the function of events forces the river and marine hydrodynamics in a variety of scenarios handling of sedimentation in the estuary. One of the aspects of impacts of current changes that are modeled around the estuary in both the condition before treatment and after a jetty. While other aspects that need to be considered is the hydraulics of the river in the upper-estuary, shoreline change and ocean wave characteristics around the mouth of the river jetty. To be able to know the current pattern of movement around the mouth of the river jetty used models of Surface Water Modeling System (SMS) As a research object is used Silandak Jetty. It has the data before the jetty was built so that could be compared with the condition in which the jetty has been built. Current survey results that occurred in these waters is caused by tidal forces and non tidal. Due to the influence of tides, currents tend to back and forth in a certain direction (from the sea into the estuary). While the non-tidal forces tend to be dominated by the longshore current (caused by the influence of the wave). The simulation result shows a flow that at low tide the sea water circulation in the waters in Silandak moving toward the west to the northwest while the tide moves in the opposite direction heading east with a range between 0,05 to 0,25 m/sec. Sediment modelling shows that flushing sediment has effectively result. Key words: Jetty, Current, Sediment Diponegoro University 2013-12-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/6568 TEKNIK; Volume 34, Nomor 3, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67568 2025-07-07T19:46:40Z teknik:TE

"250322 2025 eng " 2460-9919 0852-1697 dc Hydrotreated Vegetable Oil From Palm Oil Sludge As A Equitable Energy Strategy For Transportation Alfarizi, Fariz Fakultas teknologi industri,Departement teknik kimia ,universitas pertamina Jl. Teuku Nyak Arief, RT.7/RW.8, Simprug, Kec. Kby. Lama, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12220 Mubarok, Haris Arinanda, Ida Bagus Made Krishna Hydrotreated Vegetable Oil, Sludge Palm Oil, equitable energy, biofuels, GHG emissions Indonesia sebagai produsen minyak sawit terbesar di dunia memiliki potensi besar dalam memanfaatkan lumpur sawit (SPO) untuk menghasilkan Hydrotreated Vegetable Oil (HVO). Penelitian ini mengeksplorasi peran HVO dari SPO sebagai solusi strategis dalam transisi energi yang adil, khususnya untuk sektor transportasi. Melalui proses hidrogenasi katalitik, HVO menawarkan pengurangan emisi Gas Rumah Kaca (GRK) hingga 80% dibandingkan bahan bakar fosil, sekaligus mendukung target energi terbarukan nasional. Inovasi ini tidak hanya mengurangi ketergantungan Indonesia terhadap impor bahan bakar fosil tetapi juga mendukung prinsip ekonomi sirkular. Pengembangan teknologi dan kebijakan yang tepat sangat dibutuhkan untuk memastikan keberlanjutan dan skala produksi HVO dari SPO. Diponegoro University 2025-02-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67568 TEKNIK; Vol 46, No 1 (2025) January 2025 eng Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/23058 2020-04-17T09:39:35Z teknik:ART

"190531 2019 eng " 2460-9919 0852-1697 dc Effect of heat treatment on micro structure, hardness, high temperature oxidation resistance of martensitic stainless steel 13Cr3Mo3Ni-cast Anwar, Moch Syaiful Yulianto, Eric Jonathan Chandra, Septian Adi Hakim, Rahma Nisa Hastuty, Sri Mabruri, Efendi high temperature; oxidation; martensitic stainless steel; 13Cr3Mo3Ni-cast; heat treatment; microstructure; hardness vikers Tulisan ini memaparkan pengaruh perlakuan panas terhadap struktur mikro, kekerasan dan ketahanan oksidasi suhu tinggi pada baja tahan karat martensitik 13Cr3Mo3Ni-cor. Tujuan penelitian ini adalah untuk meningkatkan kualitas baja tersebut melalui proses perlakuan panas terhadap struktur mikro, kekerasan dan ketahanan oksidasi temperatur tinggi. Proses pembuatan baja tahan karat 13Cr3Mo3Ni-cor dilakukan menggunakan proses peleburan induksi dan pengecoran sedangkan perlakuan panas yang dialami oleh baja tersebut antara lain austenisasi, tempering tunggal dan tempering ganda. Proses austenisasi dilakukan pada temperatur 1020°C selama 4 jam dan didinginkan diair kemudian dilanjutkan proses tempering 650°C selama 2 jam dan didinginkan di udara dan kemudian dilanjutkan proses tempering ganda 550°C selama 2 jam dan didinginkan di udara.Pengujian struktur mikro, kekerasan dan uji oksidasi temperatur tinggi 400-700 °C dilakukan pada masing-masing baja dengan perlakuan panas yang berbeda. Kemudian, hasil eksperimen baja temper ganda dibandingkan dengan baja kontrol, baja austenisasi dan baja temper  tunggal. Perlakuan panas temper ganda menghasilkan dampak positif terhadap ketahanan baja tahan karat martensitik 13Cr3Mo3Ni-cor di lingkungan suhu tinggi. Diponegoro University 2019-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/23058 TEKNIK; Vol 40, No. 1 (2019): Mei 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1930 2012-08-08T06:08:29Z teknik:ART

2460-9919 0852-1697 dc KUALITAS VERSUS STANDAR Bakhtiar, Arfan Standard, Quality, Relationship This paper discusses about standard and quality and the relation between those variables. The resultdescribes the strong relationship and contribution to the product successfulness in the trade and business.Based on the literature reviewed, it is clear that company products (goods and services) are basicallycompetitive if the product refered to designated standard. Standard automatically assures the quality of theproduct in the business trade   Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1930 TEKNIK; Volume 29, Nomor 2, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/49587 2023-10-12T21:21:38Z teknik:ART

"230830 2023 eng " 2460-9919 0852-1697 dc Mg-0.5Ca-4Zn-xCaCO3 (x=8, 10) Alloy Foams with Closed-Pore Structure Synthesized by Powder Metallurgy Process for Implant Applications Erryani, Aprilia National Research and Innovation Agency Lestari, Franciska Pramuji National Research and Innovation Agency Triwardono, Joko National Research and Innovation Agency Elvira, Bunga Rani National Research and Innovation Agency Siswayanti, Bintoro National Research and Innovation Agency Setiawan, Albertus Deny Hadi National Research and Innovation Agency alloy foam; CaCO3 foaming agent; Mg-Zn-Ca alloys; closed-pore structure This work aims to synthesize Mg-0.5Ca-4Zn alloy foams using a CaCO3 foaming agent and a powder metallurgy (PM) process. Mg-0.5Ca-4Zn-xCaCO3 (x=8, 10 wt.%) alloy precursors were prepared by mixing Mg, Ca, and Zn metal powders with CaCO3 granules, compacting, and then sintering at various temperatures (i.e., 650, 675, and 700 °C) for 5 hours in an argon atmosphere. The pore morphology was observed by scanning electron microscopy (SEM), and the phase formation was analyzed using X-ray diffractometry (XRD). The density and porosity were evaluated using an Archimedes test (ASTM B311-93). The compressive strength was examined using a universal testing machine (UTM) with a constant crosshead speed of 1.3 mm/min (ASTM D695-02). SEM observation reveals the formation of pores with a closed-cell type structure in all alloy compositions. Increasing either the CaCO3 content or sintering temperature results in an increase in porosity and pore sizes but a decrease in compressive strength. The maximum porosity of 43.208% was obtained in the alloy foam with 10 wt.% CaCO3 sintered at 700 °C; the foam exhibits a compressive strength of 52.9 MPa, close to cancellous bone. Diponegoro University 2023-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/49587 TEKNIK; Vol. 44, No. 2 (2023): August 2023 eng Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/23072 2020-04-17T09:39:49Z teknik:ART

"191231 2019 eng " 2460-9919 0852-1697 dc Semiun, Oktovianus Edvict Universitas Katolik Widya Mandira https://scholar.google.co.id/citations?user=IqvVQaIAAAAJ&hl=id Penelitian ini bertujuan untuk menentukan faktor-faktor yang berpengaruh signifikan terhadap kepemilikan sepeda motor di kota Kupang dan memprediksi besarnya peluang atau probabilitas suatu rumah tangga untuk memiliki satu, dua, dan lebih dari dua sepeda motor sebagai akibat dari perubahan kondisi karakteristik sosio-ekonomi mikro. Penelitian ini berbasis model multinomial logit (MNL) dengan metode maksimum likelihood. Berdasarkan kalibrasi hasil pemodelan, faktor yang berpengaruh signifikan terhadap kepemilikan sepeda motor di Kota Kupang adalah jumlah anggota keluarga, penghasilan, jumlah anggota keluarga yang bekerja, jumlah anggota keluarga yang sekolah, dan waktu tempuh ke sekolah. Perubahan ekstrim keselurahan faktor kepemilikan sepeda motor (nilai berubah dari 0 ke 0.50) akan meningkatkan probabilitas kepemilikan satu sepeda motor sebesar 43.90%, meningkatkan probabilitas kepemilikan dua sepeda motor sebesar 42.07% dan menurunkan probabilitas kepemilikan lebih dari dua sepeda motor sebesar 85.98% sebagai akibat dari kecenderungan untuk memiliki mobil pribadi. Pengembangan model ini telah memberikan indikasi pada tren yang diharapkan dari kepemilikan sepeda motor Diponegoro University 2019-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/23072 TEKNIK; Vol 40, No. 3 (2019): Desember 2019 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2004 2012-02-24T11:23:19Z teknik:ART

2460-9919 0852-1697 dc SURVEI TOPOGRAFI UNTUK MENENTUKAN GARIS TAMPAK PANDANG BASE TRANSCEIVER STATION (BTS) Laila Nugraha, Arief Sudarsono, Bambang BTS (Base Transceiver Station), LoS (Line of Sight), Topographic Survey, Survey of GPS (Global Positioning System), Study Map Base Transceiver Station (BTS) representation one of appliance of supporter of telecommunicationsnetwork. The development of BTS have to each other in circuit by other BTS or which have been planned.The situation BTS in circuit between other BTS without obstacle are called Line of Sight (LoS). Thetopographic survey is method of survey work to make sure the Line of Sight BTS. The topographic surveyconsist of GPS survey and study map for determination of high of BTS antenna and the Line of Sight ofBTS can be made. Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2004 TEKNIK; Volume 29, Nomor 1, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/52958 2023-06-25T22:39:35Z teknik:ART

"230531 2023 eng " 2460-9919 0852-1697 dc Mechanical Performance Analysis of Geopolymer Concrete using Fly Ash Tanjung Jati B for Sustainable Construction Materials Indriyantho, Bobby Rio Department of Civil Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 https://orcid.org/0000-0003-2323-120X Purwanto, Purwanto Department of Civil Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Riko, Rydell Department of Civil Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 concrete; geopolymer; fly ash; workability; compressive strength The use of concrete as the primary building construction material caused serious problems in the construction industry. Concrete is not regarded as an environmentally friendly material since the use of cement results in high carbon emissions during the manufacturing process. One effort to replace cement without reducing concrete strength is to use fly ash as a concrete ingredient, which is known as geopolymer concrete. The goal of this research was to determine the basic mechanical properties of geopolymer concrete and compare it to conventional concrete with the same material proportions. The mix design of the three different proportions with the ratio of aggregates to binder as 70% : 30%, 60% : 40% and 50% : 50% was maintained such that the concrete mix has a good workability. As a result, the so-called workable fly ash-based geopolymer concrete has higher compressive strength, splitting tensile strength, and modulus of elasticity compared to conventional concrete, while its Poisson's ratio is slightly lower. Diponegoro University 2023-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/52958 TEKNIK; Vol. 44, No. 1 (2023): May 2023 eng Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/8714 2020-04-17T09:31:00Z teknik:ART

"160730 2016 eng " 2460-9919 0852-1697 dc Pengaruh Sosial Budaya Islami Terhadap Tatanan Permukiman Kampung Arab Sugihwaras Wulandari, Astari Magister Teknik Arsitektur, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang Setioko, Bambang Magister Teknik Arsitektur, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang Suprapti, Atik Magister Teknik Arsitektur, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang pengaruh; sosial budaya Islami; tatanan permukiman; nfluence; Islamic socio-cultural; settlement arragement Bentuk lingkungan permukiman sebagai suatu produk komunitas adalah hasil kesepakatan sosial dan bukan merupakan produk inividual. Dengan kata lain, komunitas yang berbeda tentunya akan menunjukkan karakter yang berbeda pula. Kampung Arab Sugihwaras sebagai permukiman yang dihuni oleh masyarakat keturunan Arab di Pekalongan terancam oleh berbagai perubahan baik pada aspek sosial budaya maupun bentukan fisik permukiman. Pada kondisi ideal bentukan fisik permukiman yang khas yang diperkuat oleh nilai – nilai sosial budaya masyarakat keturunan Arab di Sugihwaras dapat menjadi suatu identitas tersendiri bagi kawasan. Untuk itu penting untuk mengetahui pengaruh sosial budaya Islami terhadap tatanan permukiman untuk mencegah hilangnya identitas masyarakat dan mempertahankan keteraturan lingkungan permukiman. Tujuan penelitian ini adalah untuk mengetahui bagaimanakah pengaruh sosial budaya Islami terhadap tatanan permukiman Kampung Arab Sugihwaras. Penelitian ini dilakukan dengan menggunakan metodologi kuantitatif deskriptif melalui paradigm postpositivistik. Berdasarkan hasil uji regresi terhadap variabel penelitian ditemukan adanya pengaruh sosial budaya Islami sebesar 14,2, % sedangkan secara parsial tidak semua variabel pada sosial budaya Islami berpengaruh terhadap tatanan permukiman. Akan tetapi hanya variabel lingkungan bertetangga saja yang menunjukkan adanya pengaruh secara langsung. [The Islamic Socio-Cultural Influence toward Settlement Arragement in Kampung Arab Sugihwaras] Neighborhoods forms as a community product is the result of social consensus and not a product inividual. In other words, different communities will certainly show different characters. Sugihwaras Arab village as a settlement inhabited by the descendants of Arabs in Pekalongan threatened by various changes both in the socio-cultural aspects as well as the space order of settlements. On the ideal conditions, space order of typical settlement reinforced by values - social and cultural values of Arab descent in Sugihwaras can be a separate identity for the region. It is important to know the social influence of Islamic culture against settlement arrangement to prevent the loss of community identity and maintain regularity neighborhoods. The purpose of this study was to determine how the social influence of Islamic culture to the Arab village Sugihwaras settlement arrangement. This research was done by using descriptive quantitative methodology through post- positivistm paradigm. Based on the results of the regression test against variables the study found the social influence of Islamic culture by 14.2% while partially not all socio-cultural variables on Islamic influence on settlement arrangement. But only neighbourhood variables showed a direct influence to the settlement arragement in Kampung Arab Sugihwaras.   Diponegoro University 2016-07-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/8714 TEKNIK; Vol 37, No 1 (2016): (Juli 2016) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1740 2012-02-10T06:29:29Z teknik:ART

2460-9919 0852-1697 dc KUALITAS LINGKUNGAN PERMUKIMAN KAWASAN PECINAN KOTA SEMARANG Yuliastuti, Nany Khaerunnisa, Isti China Town, Environmental Quality of Settlements Chinatown is a component of the urban area which has many unique possibilities and store a wide variety issuesrelated to its area development and social culture. Chinatown in Semarang is one area that has a specialtreatment from the local government of Semarang where it has a high commercial and cultural value. The areahas some issues that are often experienced by urban settlements in the high building density that causes thedifficulty of procuring open space and green open spaces, some of the environmental infrastructure damage suchas potholes, clogged channels to rubbish strewn everywhere. The purpose of this study was to assess theenvironmental quality of settlements in the Chinatown area of Semarang. General approach used in this study isa quantitative approach. While the analytical techniques used in this research is descriptive statistics, withdescriptive techniques of quantitative, qualitative and descriptive descriptive and comparative analysis ofweighting as an analytical tool used to support the analysis. The results of this study is the quality ofneighborhoods in the city of Semarang's Chinatown area belong to the category of Medium with a value of 50 inunits of percent. This value is derived from the analysis of public facilities and infrastructure conditions of theenvironment area, the analysis of the physical quality of the built environment, and public awareness of theenvironmental analysis has been done before, where all of the analysis is at a Moderate category. This indicatesthat the need to increase the quality of neighborhoods Chinatown area, in anticipation of a decline inenvironmental quality. A good public awareness of the environment in which they live will be able to preventdegradation of Semarang's Chinatown neighborhood area can even improve the quality of the settlements in theregion. Diponegoro University 2012-02-02 14:47:46 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1740 TEKNIK; Volume 32, Nomor 3, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/24818 2021-05-06T06:54:02Z teknik:ART

"201128 2020 eng " 2460-9919 0852-1697 dc The Improvement of Electric Power Losses Using Bank Capacitor and Tap Changer With Shark Smell Algorithm Sumarno, Radiktyo Nindyo Master Program of Electrical Engineering, Universitas Diponegoro Handoko, Susatyo Department of Electrical Engineering, Universitas Diponegoro Facta, Mochammad Department of Electrical Engineering, Universitas Diponegoro bank capacitors; tap changer; electric power losses; Shark Smell algorithm Salah satu cara mengoptimalkan saluran transmisi adalah dengan mengurangi rugi-rugi daya listrik. Tap pengubah sadapan pada transformator daya dan kapasitor bank dapat digunakan untuk mengatur tegangan sistem yang berakibat menurunkan rugi-rugi daya di saluran transmisi. Penentuan nilai tap setting dan kapasitor bank dalam proses perencanaan sulit dilakukan secara pasti sehingga umumnya dilakukan melalui mekanisme trial dan error menggunakan metoda aliran daya. Karena penentuan nilai tap setting dan kapasitor bank yang sulit dilakukan secara pasti, maka pada penelitian ini dilakukan optimasi dengan algoritma shark smell yang bertujuan untuk mendapatkan nilai pengubah sadapan dan kapasitor bank yang lebih tepat pada sistem IEEE 30-bus. Pada penelitian ini dilakukan beberapa optimasi yaitu optimasi tap setting, optimasi kapasitor bank, dan optimasi tap setting yang dikombinasikan dengan optimasi kapasitor bank. Pada kondisi optimasi tap setting, diperoleh pengurangan rugi-rugi daya aktif sebesar 0,65% dari kondisi tanpa optimasi. Pada optimasi kapasitor bank,diperoleh pengurangan rugi-rugi daya aktif sebesar 0,90% dibandingkan kondisi tanpa optimasi. Pada optimasi kombinasi tap setting dan kapasitor bank diperoleh pengurangan rugi-rugi daya aktif sebesar 1,23%. Perbandingan hasil dari semua optimasi tersebut didapatkan hasil bahwa kombinasi optimasi tap setting dan kapasitor bank diperoleh pengurangan rugi-rugi daya aktif paling besar. Pada penelitian ini dihasilkan pengurangan rugi-rugi daya aktif sebesar 217,2 kW. Berdasarkan nilai pengujian, didapatkan hasil bahwa algoritma Shark Smell dapat memberikan hasil optimasi yang lebih baik 1,23% dibandingkan kondisi tanpa optimasi Diponegoro University 2020-11-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/24818 TEKNIK; Vol 41, No. 3 (2020): December 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/3786 2012-07-18T08:47:52Z teknik:ART

"120409 2012 eng " 2460-9919 0852-1697 dc PENINGKATAN KECEPATAN PROSES PENGERINGAN KARAGINAN MENGGUNAKAN PENGERING ADSORPSI DENGAN ZEOLIT Djaeni, Mohamad Array Drying carrageenan product still deals with low product quality and energy efficiency. The drying with airdehumidified by activated natural zeolite has a potential for drying the product. In this concept, air as dryingmedium was contacted with zeolite to reduce its relative humidity. Hence, the driving force of drying increasesand the process can be conducted at moderate temperature (40-60oC) to retain the quality. This research looksinto the effectiveness of adsorption dryer with zeolite for drying carrageenan. The natural zeolite is activated byheating 300-400oC for 2-3 hours. The zeolite is then used to dehumidify the ambient air as drying medium. Inthis work, the effect of drying temperature and carrageenan thickness on water content in carrageenan duringthe drying were studied. Results showed with air velocity 3.0 m/sec, thickness of carrageenan 1-2 mm,operational drying time 3 hours and air temperature 40-60oC, water content in carrageenan can be reducedfrom 82.0% to 25%. This result is very promising for industrial application. Diponegoro University 2012-07-12 10:29:15 https://ejournal.undip.ac.id/index.php/teknik/article/view/3786 TEKNIK; Volume 33, Nomor 1, Tahun 2012 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/59324 2025-04-24T18:11:04Z teknik:ART

"240613 2024 eng " 2460-9919 0852-1697 dc Nasmiarta, Zhafarina Malaha Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Balai Wilayah Sungai Papua Barat, Kementerian Pekerjaan Umum dan Perumahan Rakyat, Jl.Pasir Rido Manokwari, Indonesia 98312 https://orcid.org/0009-0009-0807-506X Suharyanto, Suharyanto https://orcid.org/0000-0002-1636-5827 Sukamta, Sukamta Permana, Agung Pondasi Bendungan Ameroro tersusun dari batuan metamorf sekis yang memiliki sebaran kekar terbuka dengan jarak spasi rata-rata 12,5 cm dan bukaan kekar 1-5 cm. Hal tersebut dapat berpotensi terjadinya rembesan air melalui sela-sela rekahan sehingga diperlukan adanya perbaikan pondasi pada Bendungan Ameroro dengan metode grouting. Sebelum dilakukan pekerjaan grouting, dilakukan pekerjaan trial grouting. Penelitian ini dilakukan untuk melihat korelasi nilai lugeon dengan kondisi geologi batuan pondasi. Metode yang dilakukan adalah uji permeabilitas (uji lugeon). Dari hasil uji lugeon, di lubang pilot, lubang primer dan lubang sekunder menunjukkan bahwa semakin dalam lubang trial grouting, nilai lugeon akan semakin kecil sedangkan semakin besar nilai lugeon, grout take akan semakin besar. Namun, pada lubang cek terdapat nilai lugeon yang masih tinggi di kedalaman 10 meter yaitu 5,17 – 8,14, di kedalaman 20 – 25 meter juga memiliki nilai yang tinggi yaitu 4,86. Hal ini sesuai dengan peta geologi pada sandaran kanan sedalam 35 meter memiliki struktur batuan yang kurang bagus sehingga memiliki nilai lugeon cukup tinggi dan besar grout take tinggi. Diponegoro University 2024-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/59324 TEKNIK; Vol. 45, No. 1 (2024): May 2024 ind Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/10306 2020-04-17T09:34:13Z teknik:ART

"171229 2017 eng " 2460-9919 0852-1697 dc Optimization of Penicillium Lagena Medium Cultivication on Antifungal Pathogen of Phellinus Lamaoensis Using Surface Methode Nabilah, Siti Departement Bioteknologi, Institut Pertanian Bogor Sunaryanto, Rofiq Balai Bioteknologi, Badan Pengkajian dan Penerapan Teknologi Syamsu, Khaswar Departemen Teknologi Agroindustri, Institut Pertanian Bogor active compound; optimization; Penicillium lagena; RSM Phellinus lamaoensis (Murr.) Hein is fungal pathogen that can cause brown root rot disease in cocoa, tea, rubber, and coffee plants. Endophytic fungi, Penicillium lagena, isolated from bandotan (Ageratum conyzoides Linn.), medicinal plant, is able to inhibit the growth of pathogenic, P. lamaoensis. The effect of carbon source, nitrogen source, and mineral solution was studied. Lactose, yeast extract, and mineral solution were media components which showed significant effect toward production of P. lagena active compound. Composition optimization of these three medium components was done by response surface methodology (RSM). The Optimal response region of the significant factor was predicted by using a second order polynomial model with statistical design, central composite design (CCD). Higest production of P. lagena active compound by quadratic model was predicted to be 69.233%  with medium composition 44.77 g L-1 lactose, 13.02 g L-1 yeast extract, and 15.95 mL L-1 mineral solution. Verification value in laboratory is 58.365%, lower 15.7% than its prediction. Optimization increase P. lagena active compound 9 fold compared to unoptimize media. Diponegoro University 2017-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/10306 TEKNIK; Vol 38, No 2 (2017): (Desember 2017) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1819 2012-02-15T03:18:19Z teknik:ART

2460-9919 0852-1697 dc ANALISIS KONSENTRASI PARTICULATE MATTER 10 (PM10) PADA UDARA DILUAR RUANG (STUDI KASUS : STASIUN TAWANG - SEMARANG) Setiyo Huboyo, Haryono Sutrisno, Endro Information system, requirement analysis, likert scale, factor analyis The need to obtain the speed and information accuracy provided in an organization conducting dataprocessing in gross, complex and finite during make the organization require the information system tosupport their business.Systems analysis represent the early stage in determining quality of system development in informationsystem to be developed. Analysis of Requirement of sistem, one of the phase of systems analysis, haveplaying important role to formulate what must be owned and done by an information system.This report using quistioner of the measuring instrument by using modification of Likert scale for onehundred responder to get the data. Processing data is conducting bytest of validity and reability, thenfactor analysis is done for formulation of system requirement. Diponegoro University 2012-02-02 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1819 TEKNIK; Volume 30, Nomor 1, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/33816 2021-08-29T17:46:58Z teknik:ART

"210826 2021 eng " 2460-9919 0852-1697 dc The Impact of Using Portable Sealer on Drop Out Component' Number at Surface Mounting Technology Production Line Nugroho, Adi Program Studi Teknik Industri Fakultas Teknik, Universitas Universal https://sinta.ristekbrin.go.id/authors/detail?id=5999470&view=overview Muchid, Abdul Program Studi Teknik Industri Fakultas Teknik, Universitas Putera Batam portable sealer, drop out component The study aims to reduce the drop out of components that occur in the surface-mounting technology production line of PT. TEC Indonesia. This effort is carried out by designing a portable sealer product to glue the cover tape and carrier tape component products made in the line. In order to obtain the best value indicator for product design, this study uses a quantitative factorial design technique to determine value reduce drop out of components in the surface mounting technology (SMT) production of the parameter combination use of adhesive strength produced by the product. Information on study data obtained through the concept of experimental design (DOE) using temperature and treatment time parameters resulting from the product's design. Results of the tests have been carried out. Information on the adhesive strength reaches standard is rated at a temperature 1200 C for one two and three seconds, which can produce adhesion of 0.029 Kgf (the standard value is at 0.02-0.07 Kgf). In addition, the number of drop-out components produced after using the product has decreased significantly to zero, which previously reached an average of two to three components that were damaged or defective (test data). Diponegoro University 2021-08-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/33816 TEKNIK; Vol. 42, No. 2 (2021): August 2021 eng https://ejournal.undip.ac.id/index.php/teknik/article/download/33816/100616 Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/5629 2017-07-19T17:16:47Z teknik:ART

"130913 2013 eng " 2460-9919 0852-1697 dc ANALISIS SERAPAN KEBISINGAN DENGAN PEMASANGAN ROCK WOOL KETEBALAN 5 CM Huboyo, Haryono S Hadiwidodo, Mochtar Suhardi, Suhardi Array The noise affects to working quality at the same degree as those to workforce and people health, therefore, appropriate noise control is indispensable. This study is aimed at evaluating of rockwool (5cm) absorption coefficient and analyzing its effectivity on noise control. The room for simulation is equipped with known noise source. In this case a sound system instrument and portable fire pump were used. The tested noise frequencies were in the range of human hearing threshold for which an equalizer instrument was used to identify the sound frequencies. Based on this study, the rockwool absorption coefficients were 0.8, 0.96, 0.98, 0.82 for sound frequency of 500 Hz, 1000 Hz, 2000 Hz and 4000 Hz respectively. By installing the rockwool on 37.97% of room area of 72 m2, this rockwool was able to reduce the noise intensity by 10.16 dBA, 10.75 dBA, 10.5 dBA, 9.58 dBA, 9.25 dBA for frequency of 500 Hz, 1000 Hz, 2000 Hz, 4000 Hz and multiple frequencies respectively. The rockwool is an effective sound absorber in noise control owing to have high absorption coefficient (almost unity) and ease for installment. Diponegoro University 2013-10-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/5629 TEKNIK; Volume 34, Nomor 2, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67500 2025-07-07T19:30:43Z teknik:ART

"250331 2025 eng " 2460-9919 0852-1697 dc Nugraha, Hendy Adiyat Department of Civil Engineering, Diponegoro University, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Wulandari, Dyah Ari Suharyanto, Suharyanto The construction of a dam consists of several stages, including construction preparation, construction planning, construction execution, and initial reservoir impoundment. This study aims to determine the duration of the initial impoundment of the Pamukkulu Reservoir during dry, normal, and wet years using the F.J. Mock water availability method. Water losses in this study include reservoir water release through the bottom outlet to meet irrigation water demand at a rate of 0.3 m³/s and reservoir evaporation. The calculation of the impoundment duration is based on the monthly accumulation of volume until reaching the total storage volume of 82.57 million m³ at a normal water level elevation of +126.00 meters. The analysis results indicate that the duration of the initial impoundment of the Pamukkulu Reservoir is 11.16 months (335 days) in a dry year with an inflow reliability of 31.81%, 8.66 months (260 days) in a normal year with an inflow reliability of 63.63%, and 7.63 months (229 days) in a wet year with an inflow reliability of 77.27%. The study concludes that the Pamukkulu Dam will reach its normal water level storage volume in December (first period) during a wet year classification. Diponegoro University 2025-03-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67500 TEKNIK; Vol 46, No 2 (2025) April 2025 ind Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/18045 2020-04-17T09:37:37Z teknik:ART

"181231 2018 eng " 2460-9919 0852-1697 dc Modeling of the operational pattern of the pump system in the polder design for flood and rob mitigation in East Semarang Arbaningrum, Rizka Departement of Civil Engineering, Pembangunan Jaya University Flood and rob; Pump Operational Pattern, East Polder Area Polder System Floods and robs that often occur in the East Semarang region result in economic, social and environmental losses. In order to improve this condition, permanent handling is needed, namely by making a polder system consisting of sea dikes, retention ponds and pump houses. The purpose of this study was to analyze the modeling of the operational pattern of the pump system in the polder design. The stages of modeling the operational pattern of the pumping system starts from the calculation of flood discharge, modeling of retention ponds, and pumps using HEC-HMS 4.0 software. The next step is analyzing the operational pattern of the pump system. From the results of the study obtained a plan in 25 annual flood discharge for retention ponds is 138 m³ / s. The design of the retention pond is 210 hectares with a depth of 3.7 m. The pump capacity required is 15 m³ / s with a pump composition with a capacity of 2.5 m³ / s and 5 m³ / s, each of 2 units. The pump modeling analysis uses a pump with a capacity of 2.5 m³ / s of 2 units and 5 m³ / s of 6 units. From the results of the analysis show that the operational pattern uses an elevation-discharge function, where the function forms the operational pattern of each pump which will operate based on the water level evaluation criteria for each pump. With these operational patterns, it will reduce operational and maintenance costs Diponegoro University 2018-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/18045 TEKNIK; Vol 39, No. 2 (2018): Desember 2018 eng Copyright (c) 2019 Teknik

oai:ojs.ejournal.undip.ac.id:article/1900 2012-02-24T11:23:19Z teknik:ART

2460-9919 0852-1697 dc IMPLEMENTASI SISTEM INFORMASI RUMAH SAKIT UNTUK SUBSISTEM LABORATORIUM DENGAN FRAMEWORK PRADO Handoyo, Eko Budi Prasetijo, Agung Mardiatmo Nur Hidayat, Dwi Hospital Information System, Prado Framework Nowadays, the need of an information for some hospital is getting bigger. This Hospital Information Systemapplication is made to be based on web by using Prado framework based on PHP programming languageand MySQL as its databases. This research include application scheme using object oriented approach,database scheme, and also examination from application as a wholeIn its making, this application adaptedwith the requirement of a hospital in general such as facility for requesting of examination disease atlaboratory, queue information of test request, record-keeping of test result of a patient at medical laboratory,pathology, and bacteriology, blood request for patient at blood bank of hospital, and also result informationof laboratory test of a patient. The result of the application examination show this information system canwork if input condition have been full filed. Process which desirable for example login and user registrationprocess, data addition, data change, data abolition, and the data seeking at system. This application earn togive queue information of test request, service for the blood requesting, and also result information oflaboratory test of a patient. Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1900 TEKNIK; Volume 29, Nomor 1, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/32736 2025-07-07T19:35:10Z teknik:ART

"220531 2022 eng " 2460-9919 0852-1697 dc UPS Design for Increased Flexibility of Use and More Economic with PWM Controlled Inverter Based on ATmega 328 Microcontroller Lubis, Rakhmad Syafutra Jurusan Teknik Elektro dan Komputer, Universitas Syiah Kuala http://elektro.unsyiah.ac.id http://orcid.org/0000-0002-9881-5851 Haris, Abdul Jurusan Teknik Elektro dan Komputer, Universitas Syiah Kuala Tarmizi, Tarmizi Jurusan Teknik Elektro dan Komputer, Universitas Syiah Kuala mikrokontroler; uninterruptible power supply; rectifier; inverter; pwm Seiring peningkatan beban listrik yang tinggi menyebabkan pemadaman listrik dapat terjadi dengan tiba-tiba saat sedang menggunakan elektronik dan tidak jarang akan menyebabkan kerusakan baik perangkat lunak maupun perangkat keras dari beban elektronik tersebut. Untuk mengatasi masalah tersebut dapat menggunakan Uninterruptible Power Supply (UPS), namun UPS juga masih memiliki kelemahan yang menjadi dasar pertimbangan penggunaanya belum meluas seperti harganya yang masih mahal dan backup time yang singkat, oleh karena itudilakukan perancangansuplai daya ac satu fasadengan pengendali Inverter Pulse Width Modulation (PWM) berbasis Mikrokontroler Atmega 328 untuk peningkatan fleksibilitas UPS menggunakan pola aliran arus sesuai bidirectional ac power supply dan disederhanakan dalam penelitian ini agar lebih ekonomis dengan jumlah diode dan MOSFET yang lebih sedikit. Total harmonic distortion (THD) tegangan 5,24 %,  frekuensi keluaran 49,56 Hz, tegangan keluaran dan susut tegangan memenuhi standard dengan perangkat UPS terdiri dari satu transformator, adaptor dan inverter dengan frekuensi swtching dan filternya dapat disesuakan. Diponegoro University 2022-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/32736 TEKNIK; Vol. 43, No. 1 (2022): May 2022 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/32736/96559 Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/7680 2014-12-24T01:37:52Z teknik:EI

"141020 2014 eng " 2460-9919 0852-1697 dc Ucapan Terima Kasih kepada Mitra Bebestari (Reviewer) Istadi, Istadi Diponegoro University 2014-10-20 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/7680 TEKNIK; Vol 35, No 1 (2014): (July 2014) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/26444 2020-03-17T01:25:32Z teknik:EI

"191111 2019 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Perbaikan atas naskah:Anwar, M. S., Yulianto, E., Chandra, S., Hamim, R., Hastuty, S., & Mabruri, E. (2019). Pengaruh Perlakuan Panas Terhadap Struktur Mikro, Kekerasan dan Ketahanan Oksidasi Suhu Tinggi Pada Baja Tahan Karat Martensitik 13Cr3Mo3Ni-Cor. TEKNIK, 40(1), 11-17. https://doi.org/10.14710/teknik.v40i1.23058. Diponegoro University 2019-11-11 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/26444 TEKNIK; Vol 40, No. 2 (2019): Agustus 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1962 2012-02-24T11:16:25Z teknik:ART

2460-9919 0852-1697 dc DETAIL ENGINEERING TEMPAT PEMBUANGAN AKHIR (TPA) REGIONAL PEKALONGAN Zaman, Badrus Syafrudin, Syafrudin Pratiwi, Diah Landfill, regional sanitary landfill Regional Final Disposal (Regional Landfill) Pekalongan is place a waste serves 3 surrounding areas. The threeareas that served are Pekalongan City, Pekalongan Regency and Batang Regency. These areas are close enoughso that Regional Landfill concept is suitable to be applied in these areas. This Regional landfill is planned to usethe concept of sanitary landfills. Location of land to be used as Pekalongan Regional Landfill is locatedprecisely at the border village of Sengare-Batursari, District Talun in the administrative area of Pekalongan.The results of this study is the design of a sanitary landfill with landfill leachate channeling system, gasventilation equipment and various other supporting facilities, including weighbridge and procurement ofrequired heavy equipment. Approxymately costs required to build the design is Rp. 88.137.990.883,56 Diponegoro University 2012-02-02 14:39:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1962 TEKNIK; Volume 29, Nomor 3, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/42888 2023-01-24T23:37:53Z teknik:ART

"221230 2022 eng " 2460-9919 0852-1697 dc Design of High-Flow Nasal Cannula Equipped with Humidification System for Acute Hypoxemic Susana, Ernia Politeknik Kesehatan Kementerian Kesehatan Jakarta II https://orcid.org/0000-0003-0028-6988 Handayani, Indah Nursyamsi Poltekkes Kemenkes Jakarta II Komarudin, Agus Poltekkes Kemenkes Jakarta II high-flow nasal cannula; humidification; air-flow; fraksi oxygen; acute hypoxemic High-Flow Nasal Cannula (HFNC) is a non-invasive oxygen therapy device that aids in administering high-flow oxygen to patients with acute respiratory distress syndrome. Since the end of 2019, the worldwide demand for HFNC devices has risen dramatically because of the Covid-19 outbreak. Multiple studies have endorsed HFNC as a treatment strategy for individuals in the early infection phase (stage 1) until they enter the pulmonary phase (pulmonary phase). Therefore, in anticipation of the need for these devices, the Indonesian Ministry of Health encourages the development of HFNC as a step towards self-sufficiency in domestic medical device products. This article describes the design of an HFNC prototype based on components accessible on the local market and a software system based on open source. The research design uses engineering design. The HFNC device is intended to create a fraction of inspired oxygen (FiO 2) in the range of 30-100%, which is regulated by two settings: oxygen flow rate and compressed air. The test results demonstrate that the FiO 2 correction value satisfies the HFNC product test method requirements of less than 5% Oxygen for every air flow rate and compressed air setting. In addition, the airflow rate measurement meets the threshold value of 60 lpm. Based on testing using performance measurement tools, it can be concluded that the HFNC design can be used as a therapeutic tool for acute hypoxia. Diponegoro University 2022-12-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/42888 TEKNIK; Vol. 43, No. 3 (2022): December 2022 eng Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/8688 2016-01-07T04:03:00Z teknik:ART

"151210 2015 eng " 2460-9919 0852-1697 dc PERBANDINGAN NILAI KALOR BIOBRIKET YANG TERBUAT DARI BOTTOM ASH LIMBAH PLTU DAN BIOMASSA CANGKANG KOPI DENGAN VARIASI KOMPOSISI DAN JENIS PENGIKAT YANG BERBEDA Gunawan, Budi Jurusan Teknik Elektro, Fakultas Teknik, Universitas Muria Kudus, PO BOX 53, Gondang Manis Bae, Kudus Slamet, Sugeng Jurusan Teknik Elektro, Fakultas Teknik, Universitas Muria Kudus, PO BOX 53, Gondang Manis Bae, Kudus Syahroni, Ahmad Jurusan Teknik Elektro, Fakultas Teknik, Universitas Muria Kudus, PO BOX 53, Gondang Manis Bae, Kudus bottom ash; biomassa; cangkang kopi; kalor; bottom ash; biomass; coffee shells; calorific value Tujuan dari penelitian ini adalah membuat biobriket dari bahan bottom ash limbah Pembangkit Listrik Tenaga Uap (PLTU) dengan biomassa cangkang kopi dengan zat pengikat tetes tebu serta menguji nilai kalor yang dihasilkan. Metode yang digunakan dalam penelitian ini adalah; pembuatan biobriket dengan memvariasi komposisi antara bottom ash dengan biomassanya serta zat pengikat yang berbeda. Variasi komposisi antara biomassa cangkang kopi dengan bootom ash yang digunakan adalah 60% : 40% dan 70% : 30%, sedangkan bahan perekatnya menggunakan tetes tebu dan tepung kanji. Pengujian yang dilakukan adalah menguji nilai kalor dari biobriket yang dihasilkan menggunakan alat uji calloriboom. Dari hasil pengujian didapatkan biobriket dengan komposisi 70% biomassa cangkang kopi dan 30% bottom ash dengan pengikat tetes tebu mempunyai nilai kalor yang paling tinggi dibandingkan dengan komposisi dan pengikat yang lain dengan nilai kalor yang dihasilkan yaitu 2496,18 kal/gr. Nilai kalor ini dipengaruhi oleh kandungan karbon aktif yang terdapat pada arang cangkang kopi dan besar kecilnya kandungan carbon, oxygen dan ash yang dimiliki, semakin tinggi kandungan carbon dan oxygen maka makin tinggi pula nilai kalor yang kandungan kalor yang terdapat pada jenis perekat tetes tebu lebih tinggi dari pada tepung kanji. [Title: Comparison of Calorific Value of Biobriket Made of Bottom Ash Waste and Biomass Plant Shell Coffee by Varying Composition and Types of Binder] This study is aimed to make biobriket of bottom ash material waste biomass power plant and different binder of coffee shell (molasses) as well as measuring the calorific value. The method in this study are by manufacturing biobricket by varying the composition of bottom ash with biomass and different binder. Biomass composition variation of the shell coffee and bottom ash are 60%:40% and 70%:30%. The binder used are molasses and starch. This experiment was carry out by measuring the calorific value of produced biobricket. From results, the biobricket with a composition of 70% biomass and 30% coffee shell bottom ash and molasses binder has the highest calorific value in comparison to other binder composition. The calorific value is 2496.18 cal/g. This calorific value is influenced by the content of activated carbon contained in charcoal shell of coffee and size of the content of carbon, oxygen and ash. Increased calorific values between the molasses and starch binders suggested that the calorific value of product when using molasses binder is higher than that of starch. Diponegoro University 2015-12-09 12:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/8688 TEKNIK; Vol 36, No 2 (2015): (December 2015) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1814 2012-02-15T03:18:19Z teknik:ART

2460-9919 0852-1697 dc PENURUNAN MODEL PERMUKAAN DIJITAL (DSM) MENJADI MODEL ELEVASI DIJITAL (DEM) DARI CITRA SATELIT ALOS PALSAR (Studi kasus: NAD Bagian Tenggara, Indonesia) Julzarika, Atriyon Sudarsono, Bambang 3D Model, Alos Palsar images, DSM2DEM Alos satellite is one of the natural resources satellite that could be used in 3D applications. The problemsthat be taken in generate 3D model with satellite imagery are the model always be formed as DigitalSurface Model (DSM), not Digital Terrain Model (DTM), Digitallen HöheModellen (DHM), Digital GeoidModel (DGM) or Digital Elevation Model (DEM). The reference system of 3D model that are produced byAlos satellite image still as surface for z axis, for x axis and y axis has been closed to 2D reference systemin some certain datum and system of map projection. In case, it needs a research for observating theaccuracy and precision of Alos satellite data using a least square adjustment of parameter methods. Theresults of this research will be used as reference for next research to invent a way for changing DSM fromAlos satellite image to be DEM, DTM, DHM, DHM, and DGM digital-automatically. It is a new innovationof differentialing technical of 3D model.A differentialing technical from DSM to be DEM could be done with least square adjustment in parametermethods. It calls DSM2DEM*. This new innovation methods for differentialing DSM2DEM. In that studycases, differentialing technical that are used be divided for two class, that are lowland area and highlandarea. Differentialing in that two class use similar methods, just is differentiated in sum up of researchingpoints that are used. In this research study of cases are in highland area and lowland area. In highlandarea uses minimize 14 researching points and in lowland area uses minimize seven researching points.That differentialing technical are done in Alos images. In other satellite images, photos, videos that studyin highland and lowland area also use this methods for differentialing DSM2DEM. Order level that areused as research points will influence the quality of its data accuracy and precision. Diponegoro University 2012-02-02 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1814 TEKNIK; Volume 30, Nomor 1, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/24690 2020-10-05T05:19:02Z teknik:ART

"200831 2020 eng " 2460-9919 0852-1697 dc Pengaruh Perlakuan Panas Baja Tahan Karat Martensitik AISI 410 terhadap Struktur Mikro dan Ketahanan Korosi di Lingkungan Simulasi Geothermal dalam Larutan Artificial Brine Prasetyo, Mukhlis Agung Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia https://lipi.go.id/staf/detail/mukh005 Anwar, Moch. Syaiful Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia Mabruri, Efendi Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia Agustiningtyas, Diah Tri Program Studi Teknik Material dan Metalurgi, Institut Teknologi Kalimantan Noviana, Rekha Chantya Program Studi Teknik Material dan Metalurgi, Institut Teknologi Kalimantan Laksono, Andromeda Dwi Program Studi Teknik Material dan Metalurgi, Institut Teknologi Kalimantan baja martensitik AISI 410; larutan brine sintetis; korosi sumuran; fasa martensit; austenit sisa; material sudu turbin Energi Panas Bumi yang berlimpah memiliki potesi untuk digunakan sebagai pembangkit listrik. Pembangkit listrik panas bumi memanfaatkan uap panas bumi untuk memutar sudu turbin yang kemudian dikonversi menjadi energi listrik. Baja tahan karat martensitik telah digunakan secara komersial untuk material sudu turbin pada turbin panas bumi. Penelitian ini bertujuan untuk mengetahui pengaruh dari perlakuan panas (as-quench dan tempering) terhadap struktur mikro, laju korosi material dan ketahanan korosi sumuran pada baja tahan karat AISI 410. Pengujian mikrostruktur dilakukan dengan menggunakan mikroskop optik dan uji korosi material didalam larutan brine sintetis dengan alat Gamry G750. Pengamatan struktur mikro baja AISI 410 setelah proses annealing adalah ferit dan karbida. Struktur mikro berupa temper martensit berbentuk bilah (lath) dengan austenit sisa dan karbida logam setelah dilakukan proses austenisasi 1050ºC dengan pendinginan cepat (quench) media oli dan temperature tempering 650ºC. Laju korosi dan ketahanan korosi piting sangat tinggi ditemukan pada baja AISI 410 full Annealing. Diponegoro University 2020-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/24690 TEKNIK; Vol 41, No. 2 (2020): August 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2137 2012-02-24T02:42:21Z teknik:ART

2460-9919 0852-1697 dc MENGANALISA UNJUK KERJA PENGERINGAN IKAN TERI DENGAN SISTEM SIRKULASI UDARA PAKSA Darmanto, Seno Setyoko, Bambang Teri/stolephorusi, drying, moisture, velocity, time, efficiency Experiment is done to know the performance of “teri/stolephorus” fish drying with forced air flow system. Theperformance of fish drying is based on moisture of fish, fan/fan velocity, operation temperature and time. Theresearch is done at laboratory by using drying machine with forced air flow system. Based on data analysis itshows that the moisture of fish achieves 20% on fan velocity maximum 2,8 m/s and times operation 3 hours Diponegoro University 2012-02-10 11:25:01 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2137 TEKNIK; Volume 28, Nomor 2, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/61566 2024-01-16T21:44:16Z teknik:EI

"231215 2023 eng " 2460-9919 0852-1697 dc Back Matter TEKNIK, Editor in Chief Department of Electrical Engineering TEKNIK Artikel editorial ini berisi back-matter TEKNIK Volume 44 Nomor 2 Tahun 2023 yang memuat petunjuk penulisan dan pengiriman artikel TEKNIK Diponegoro University 2023-12-08 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/61566 TEKNIK; Vol. 44, No. 3 (2023): December 2023 eng Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/12057 2020-04-17T09:33:11Z teknik:ART

"170701 2017 eng " 2460-9919 0852-1697 dc Pengaruh Desa Wisata Kampoeng Batik Laweyan terhadap Fungsi Permukiman di Kelurahan Laweyan Kota Surakarta Mangedaby, Eva Artmey Diponegoro University Setioko, Bambang Jurusan Aristektur, Fakultas Teknik, Universitas Diponegoro Sari, Suzanna Ratih Jurusan Aristektur, Fakultas Teknik, Universitas Diponegoro Kampung Batik, Desa Wisata, Permukiman, Fungsi Permukiman Kota Surakarta merupakan salah satu sentra produksi batik di Jawa Tengah yang terkenal karena batik berkualitas, salah satu nya adalah sentra batik yang berada di Kampung Batik Laweyan. Kampung batik yang terletak di Kelurahan Laweyan ini tengah marak di Indonesia karena merupakan salah satu daerah tujuan wisata. Sebagai kampung batik yang saat ini tengah popular, membuat kawasan permukiman di Kelurahan Laweyan juga mengalami perubahan. Hal ini terlihat dari bentuk dan tata ruang rumah itu sendiri. Perubahan ini tidak hanya terjadi pada kampung batik Laweyan saja tetapi satu Kelurahan Laweyan, sehingga mengakibatkan tidak tersedianya ruang terbuka hijau di Kelurahan Laweyan. Penelitian ini bertujuan untuk mencari pengaruh desa wisata Desa Kampung Batik Laweyan terhadap fungsi permukiman di Kelurahan Laweyan serta untuk menentukan seberapa besar pengaruh desa wisata Kampung Batik Laweyan terhadap fungsi permukiman di Kelurahan Laweyan Kota Surakarta dan bagaimana pengaruhnya. Metode penelitian yang digunakan adalah metode kuantitatif dengan pendekatan korelasi memakai analisis likerts serta analisis skoring berdasarkan asumsi yang sudah ditetapkan kemudian di uji dengan analisa regresi linear berganda menggunakan uji SPSS. Teknik analisis data dalam penelitian ini menggunakan statistik deskriprif untuk mengambil kesimpulan dari sampel yang diuji. Proses penelitian ini melalu tiga tahapan yaitu kompilasi data, pemberian kode variabel dan pengolahan data dengan analisa regresi. Hasil temuan studi yang didapat setelah melalui tahapan-tahapan tersebut adalah desa wisata Kampung Batik Laweyan mempengaruhi fungsi permukiman di Kelurahan Laweyan Kota Surakarta sebesar 81,6% sedangkan sisanya 18,4% dipengaruhi oleh faktor lain diluar model. Pengaruh desa wisata Kampung Batik Laweyan terhadap fungsi permukiman di Kelurahan Laweyan Kota Surakarta adalah dengan berubahnya fungsi permukiman di Kelurahan Laweyan yang dulunya hanya sebagai hunian sekarang berubah menjadi hunian dan tempat usaha, serta penambahan fasilitas pendukung wisata lainnya, selain itu juga terdapat penambahan street furniture yang menjadi ciri khas desa wisata Kampung Batik Laweyan. Sedangkan untuk faktor lain yang memperngaruhi diluar model adalah sejarah kawasan dan perubahan tata guna lahan. Peran stakeholders yang terkait seperti pemerintah, swasta dan masyarakat sangat diperlukan. Pemerintah berperan sebagai pengelola dan fasilitator, swasta sebagai pembantu pelaksana program pemerintah sedangkan masyarakat bisa berpartisipasi dalam pengembangan desa wisata Kampung Batik Laweyan.   Kata Kunci: Kampung Batik, Desa Wisata, Permukiman, Fungsi Permukiman Diponegoro University 2017-07-01 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/12057 TEKNIK; Vol 38, No 1 (2017): (Juli 2017) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1768 2012-02-10T07:57:25Z teknik:ART

2460-9919 0852-1697 dc ANALISA ELECTRODE CONSUMABLE TYPE OK AUTROD 12.10 DENGAN PENGELASAN SUBMERGED ARC WELDING (SAW) PADA BLOCK KAPAL DCV 18500 DWT DI PT. JASA MARINA INDAH SEMARANG Kiryanto, Kiryanto Sasmito Hadi, Eko Submerged Arc Welding, Consumable electrode, and Flux. In this of globalization is growing very rapidly advancing technology. As well as in shipyard industry is toshipbuilding process. Submerged Arch Welding (SAW) is as joint methode of ship construction. Purpose ofresearch know number of electrodes wich requirement on block welding the ship DCV 18500 DWT in JasaMarina Indah Shipyard Semarang.The specimen experiment used is ST 42 low carbon steel. Variation of plates tickness is 12, 13, 14, 17, 19 and24 mm. Research step is carried out by making the specimen with variation thickness respectively. Specimendimensions length x width is 500 mm x 50 mm. The number of each specimen was made of three pieces. Thendo the measurement welding length, length and weight electrodes and slag welding.The analysis result of data welding on the specimen can be known number of electrode s and fluxs inSubmerged Arch Welding (SAW). The aplication of this research is the block DB 5(p/c/s), SS5A(p/s), SS5B(p/s), UD 5C, and TB 102 (p/c/s. Weight of consumable electrodes is 2185.31 kg (73 roll) and number offlux used wight is 2967.95 kg (119 bag). Diponegoro University 2012-02-02 14:46:02 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1768 TEKNIK; Volume 31, Nomor 2, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/32683 2021-08-29T17:46:58Z teknik:ART

"210826 2021 eng " 2460-9919 0852-1697 dc The development of A Simulation Tool for Numerical Modelling of High Flexure and High Shear Reinforced Concrete Elements Nuroji, Nuroji Departemen Teknik Sipil Fakultas Teknik, Universitas Diponegoro Asshidiqie, Muhammad Rony Departemen Teknik Sipil Fakultas Teknik, Universitas Diponegoro Sukamta, Sukamta Departemen Teknik Sipil Fakultas Teknik, Universitas Diponegoro Han, Ay Lie Departemen Teknik Sipil Fakultas Teknik, Universitas Diponegoro https://hanaylie.id/ https://orcid.org/0000-0002-0990-5274 numerical modelling; finite element method; flexure and shear behavior; model validation Pengujian eksperimental elemen beton bertulang di laboratorium memiliki kelemahan bahwa penyiapan benda uji sampai selesainya proses pengujian memerlukan waktu lama. Biaya yang tinggi mengakibatkan jumlah benda uji terbatas, dan beratnya elemen skala penuh merupakan kendala pada saat set-up. Tingkat ketidak-telitian dipengaruhi banyak faktor seperti ketersediaan alat presisi, kondisi laboratorium dan faktor kehandalan laboran. Agar perilaku sebuah elemen beton bertulang dapat dianalisa dengan teliti dan cepat, diperlukan sebuah model numeris yang dapat digunakan sebagai alat simulasi untuk menganalisa pengaruh variabel-variabel bebas pada perilaku elemen beton bertulang. Agar model numeris diyakini kehandalan dan ketelitiannya, perlu dilakukan beberapa tingkatan validasi, baik dari validasi sensitivitas model itu sendiri, maupun validasi terhadap data benda uji aktual di laboratorium. Model elemen hingga yang dikembangkan dalam studi ini dikhususkan pada kondisi tegangan lentur dan geser tinggi, akibat respon beban vertikal dan horizontal yang umum terjadi pada stuktur sesungguhnya di lapangan. Proses validasi terhadap model dilakukan dengan analisa sensitivitas terhadap kehalusan mesh dan inkrementasi deformasi vertikal, sedang validasi terhadap benda uji eksperimental di tujukan pada aspek respon beban-deformasi dan pola perkembangan retak beton. Dari proses ini dibuktikan bahwa model yang dikembangkan memberikan hasil prediksi yang sangat teliti terhadap perilaku elemen sesungguhnya, sehingga dapat digunakan sebagai alat simulasi. Diponegoro University 2021-08-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/32683 TEKNIK; Vol. 42, No. 2 (2021): August 2021 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/32683/96416 https://ejournal.undip.ac.id/index.php/teknik/article/download/32683/96417 https://ejournal.undip.ac.id/index.php/teknik/article/download/32683/96418 https://ejournal.undip.ac.id/index.php/teknik/article/download/32683/96419 Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4814 2013-05-06T03:37:15Z teknik:ART

"130402 2013 eng " 2460-9919 0852-1697 dc PENGARUH PERUBAHAN KECEPATAN KAPAL TERHADAP LEVEL KETINGGIAN AIR PADA SISTEM PALKAN IKAN HIDUP DENGAN SISTEM NATURAL UNTUK KAPAL IKAN TRADISIONAL DI KABUPATEN REMBANG JAWA TENGAH Sasmito Hadi, Eko Wilma A, Wilma A Munardi, Robby Al Fahsan, Al Fahsan Array Development of conventional fish hold design to live fish hold design may provide an alternative solution to keep costs of preservation of fish catches down. Live fish hold systems left the water in the hold with sea water to circulate around by giving a hole at the base of the hatch. Rembang traditional fishing vessel has the basic characteristics of a flat bottom with a long form of the stern board and has a habit of leaning on the edge of the ocean with a sloping surface. The research was carried out on several models of variations in the number of holes and diameter of holes. Water in the live fish hold with ship stationary state will have the same height with a draught of ship, but as increases of speed of ship then the height of water in the hold will decrease. Based on the analysis and calculation of Computational Fluid Dynamics method results obtained show that the optimum velocity of each model reaches 7 knots. Models with a variation of amount 4 holes with 2 inch diameter hole has an average altitude of the highest water level of 2.16 m at a speed of 7 knots. Diponegoro University 2012-08-08 13:06:31 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/4814 TEKNIK; Volume 34, Nomor 1, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/63041 2025-04-17T01:00:52Z teknik:ART

"241230 2024 eng " 2460-9919 0852-1697 dc Matheus, Patrick Department of Civil Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Hartono, Darwin Salah satu proyek jembatan di Kalimantan berdiri diatas tanah lunak (soft soil). Tanah lunak memiliki daya dukung yang kurang baik, kuat geser dan permeabilitas yang rendah serta kompresibilitas yang besar. Timbunan jalan pada proyek jembatan tersebut memerlukan waktu selama 310 bulan untuk mencapai konsolidasi 90%. Perencanaan awal untuk perbaikan tanah (soil improvement) menggunakan metode prefabrikasi drainase vertikal (PVD). Metode PVD dengan beban preloading memerlukan waktu 28 bulan untuk mencapai konsolidasi 90% atau daya dukung rencana. Pelaksanaan metode PVD  sulit dilakukan pada lahan dengan akses yang kurang baik untuk kendaraan berat (rig PVD).  Penelitian ini menganalisis penggunaan cerucuk dan geotekstil pada tanah dasar atau eksisting untuk mempercepat waktu pelaksanaan pekerjaan. Jumlah cerucuk di Kalimantan yang cukup berlimpah dan mudah dilakukan pengadaannya menjadi pertimbangan penggunaan metode perbaikan tanah ini. Hasil analisis dari penggunaan cerucuk dan geotekstil memberikan daya dukung yang baik terhadap beban rencana dengan faktor keamanan ≥ 1,3. Pelaksanaan cerucuk dan timbunan membutuhan waktu total pelaksanaan 7 bulan. Dengan demikian penggunaan cerucuk pada salah satu proyek jembatan di Kalimantan mengalami efisiensi waktu pengerjaan sebesar 75 persen dari rencana pengerjaan proyek menggunakan PVD selama 28 bulan. Diponegoro University 2024-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/63041 TEKNIK; Vol 45, No 3 (2024): December 2024 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/63041/205079 Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/15918 2020-04-17T09:36:51Z teknik:ART

"181231 2018 eng " 2460-9919 0852-1697 dc Risk Assessment of Information System of Faculty of Engineering University Diponegoro Using Failure Mode Effect and Analysis Method based on Framework ISO 27001 Handayani, Naniek Utami Department of Industrial Engineering, Faculty of Engineering, Diponegoro University https://scholar.google.com/citations?user=wJT5zuEAAAAJ&hl=en http://orcid.org/0000-0001-7057-6126 Wibowo, Mochammad Agung Department of Civil Engineering, Faculty of Engineering, Diponegoro University Sari, Diana Puspita Department of Industrial Engineering, Faculty of Engineering, Diponegoro University Satria, Yoga Department of Industrial Engineering, Faculty of Engineering, Diponegoro University Gifari, Akbar Romadhona Department of Industrial Engineering, Faculty of Engineering, Diponegoro University Information System; Risk assessment; ISO 27001 Framework; risk agent; FMEA; RPN The data leakage and misuse of information by unauthorized parties that had happened forces the protection of security of information system in the Faculty of Engineering Diponegoro University (SIFT UNDIP) to be improved. This research aims to identify the risks, to analyze security of information system management, and to  determine risk priority in SIFT UNDIP. This research is conducted using Failure Mode Effect and Analysis method based on ISO 27001 framework. Analysis results show that there are 25 risk agents in SIFT UNDIP which are categorized into four types of assets. The highest risk in High Level Risk category is the risk of dependence on employees which has Risk Priority Number value of 80. Diponegoro University 2018-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/15918 TEKNIK; Vol 39, No. 2 (2018): Desember 2018 eng Copyright (c) 2019 Teknik

oai:ojs.ejournal.undip.ac.id:article/1890 2012-02-24T10:20:44Z teknik:ART

2460-9919 0852-1697 dc PERHITUNGAN POTENSI BAHAN TAMBANG SIRTU DI WILAYAH SUNGAI DI KABUPATEN PEKALONGAN Najib, Najib reserves material deposits, sand and gravel deposits Pekalongan Residence has a relatively many sand and gravel deposits particularly in river area. Nowadays,many locations have been exploited by local residences or investors from other regions. Even though theexploitation has running, up to now the local government doesn’t know yet how many reserve indicationmaterial deposits in that area. As the result of that condition, it is called for the research to determine thepotential of mining resources in river area. The factors estimate the mining potential based on geologicconditions such as elevation and deposit types. This research use grid and trapezium method. Based onlaboratories tests showed that the dominant materials in that area is up to sand size(around 87 – 98%). Thepotential of deposits is divided into three i.e. river part, levee part and land part. The total of potential in eachdistrict are Kesesi (515.625 m3), Kajen (78.295m3), Karanganyar (1.938.751m3), Wonopringgo( 1.334.375 m3),Doro( 1.984.375 m3), Talun( 1.355.625 m3), Karangdadap( 140.150 m3) and Kedungwuni( 130.000 m3). Diponegoro University 2012-02-15 10:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1890 TEKNIK; Volume 30, Nomor 3, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/41985 2025-07-07T19:35:10Z teknik:ART

"220531 2022 eng " 2460-9919 0852-1697 dc The Analysis of Na and Ca Ions Addition on Cassava Hydrolysis on Reducing Sugar Concentration to Increase Enzyme Activity: Hydrolysis Kinetics Study Hargono, Hargono Departemen Teknik Kimia, Universitas Diponegoro http://orcid.org/0000-0003-0590-2516 Jos, Bakti Departemen Teknik Kimia, Universitas Diponegoro Satriadi, Hantoro Departemen Teknik Kimia, Universitas Diponegoro Zakaria, Muhammad Fahmi Departemen Teknik Kimia, Universitas Diponegoro cassava; enzymatic hydrolysis; addition of Na ions; addition of Ca ions; kinetic studies Singkong manis (Manihot esculanta) merupakan ubi-ubiandengan kandungan pati yang besar sehingga dapat diolah untuk menghasilkan gula reduksi melalui proses hidrolisis. Salah satu jenis proses hidrolisis adalah hidrolisis enzimatis. Penambahan ion logam pada hidrolisis enzimatis dapat meningkatkan aktivitas enzim sehingga berpengaruh pada peningkatan konsentrasi gula reduksi. Tujuan penelitian ini adalah menganalisis penambahan ion Na dan ion Ca terhadap konsentrasi gula reduksi sekaligus mempelajari kinetika hidrolisis. Percobaan dilakukan pada berbagai konsentrasi substrat pati (100, 200, dan 300 g/L), konsentrasi enzim (1 dan 1,5% (b/b)), penambahan ion Na dan Ca masing-masing 60 ppm. Metode hidrolisis yang digunakan pada suhu rendah yaitu 30°C dengan enzim StargenTM 002 pada pH 4, selama 24 jam. Hasil penelitian menunjukkan konsentrasi pati 100-200 g/L mampu meningkatkan produksi gula reduksi secara signifikan pada konsentrasi enzim 1,5% (b/b). Penambahan ion Ca meningkatkan konsentrasi gula reduksi 64% sedangkan penambahan ion Na meningkatkan konsentrasi gula reduksi 18,9%. Konsentrasi gula reduksi terbaik (68,79 g/L) diperoleh pada kondisi konsentrasi pati 200 g/L dan konsentrasi enzim 1,5% (b/b) dengan penambahan ion Ca. Studi kinetika menunjukkan fenomena hidrolisis ini mengikuti persamaan Michaelis-Menten dengan nilai Km 99,183 g/L dan nilai Vmaks berturut-turut 6,053; 8,881; 15,106 g/L.jam sehingga penambahan ion Na dan Ca mampu meningkatkan aktivitas enzim.  Diponegoro University 2022-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/41985 TEKNIK; Vol. 43, No. 1 (2022): May 2022 ind Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/6220 2014-12-24T01:49:29Z teknik:ART

"141010 2014 eng " 2460-9919 0852-1697 dc PERUBAHAN FASADE RUMAH DI PERUMAHAN WONINGPARK GERGAJI SEMARANG Arif, Burhan Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang, Array [Title: A Change of The Facade of a House in Recidential Woningpark Gergadji Semarang] Indis architecture is an assimilation or a mixture of elements of Western culture especially the Dutch with Indonesian culture, especially from Java. Woningpark Gergadji (Park Housing Gergadji or NIS - Park) is a residential complex that is occupied by employees and their families who work in the NIS / Nederlands Indische Spoorweg Maatschapij (now PT . KAI DAOP IV) since the Dutch colonial era. The houses in the housing preserved and maintained . But now every home no longer has the same view of the facade as the first appearance of the facade of the colonial period look even additional buildings that resemble a home between homes - the original home. This thesis discusses a changes the facade of the main house at Recidential Woningpark Gergadji performed by residents since occupied. If there is a change of the facade that does not follow the rules that match the architecture of the building, it will make the facades of the building will lose its identity. A growing phenomenon in that houses, there is a change in the facade of the main building and the new building increased in the land. Therefore, the PT. KAI DAOP IV and residents today must work well together so that the houses retaining the architectural identity.   Diponegoro University 2014-10-20 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/6220 TEKNIK; Vol 35, No 1 (2014): (July 2014) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67466 2025-11-17T01:02:24Z teknik:ART

"251117 2025 eng " 2460-9919 0852-1697 dc Effect of In Situ Gelatin Addition on the Synthesis and Characteristics of Limestone Based Hydroxyapatite using Sol-Gel Method Edahwati, Luluk Department of Chemical Engineering, Universitas Pembangunan Nasional "Veteran" Jawa Timur, Jl. Rungkut Madya, Gunung. Anyar, Surabaya, 60294 Rahmah, Nazila Alfi Department of Chemical Engineering, Universitas Pembangunan Nasional "Veteran" Jawa Timur, Jl. Rungkut Madya, Gunung. Anyar, Surabaya, 60294 Wahyudi, Mohammad Rafli Alif Department of Chemical Engineering, Universitas Pembangunan Nasional "Veteran" Jawa Timur, Jl. Rungkut Madya, Gunung. Anyar, Surabaya, 60294 Hydroxyapatite (HAp) is a major component of bone and tooth tissues used to repair and rebuild malfunctioning bone. Hydroxyapatite synthesis widely utilizes materials that have a high calcium content. In this study, limestone was used as an economical calcium precursor. Gelatin was added in situ during the sol-gel process to improve biomechanical properties such as porosity and reduce 5the particle size. The variables used during hydroxyapatite synthesis were gelatin concentrations of 30%, 40% and 50% with pH variations of 10, 11 and 12. The best yield was 30% gelatin concentration with pH 12. HAp products were characterized using Fourier Transform Infra-Red (FTIR) to confirm that there are core functional groups that compose hydroxyapatite, namely PO43-, CO(3)(2-)and OH-. SEM-EDX analysis revealed granular crystal morphology with particle dimensions below 600 nm and the highest porosity of 60.73% at pH 10. These results indicate that the in situ addition of gelatin during the sol-gel process successfully produced hydroxyapatite with biomechanical properties suitable for implant applications, especially in teeth, with optimal porosity and adequate particle size to support cell growth. Diponegoro University 2025-11-17 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67466 TEKNIK; Vol 46, No 3 (2025): Juli 2025 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/67466/220895 https://ejournal.undip.ac.id/index.php/teknik/article/download/67466/220896 https://ejournal.undip.ac.id/index.php/teknik/article/download/67466/220897 Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/48978 2022-09-19T00:37:33Z teknik:EI

"220830 2022 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi front-matter TEKNIK Volume 43 Nomor 2 Tahun 2022, yaitu meliputi halaman sampul, fokus dan ruang lingkup TEKNIK, informasi indeksasi, susunan tim penyunting dan mitra bebestari, kata pengantar editor dan daftar isi. Diponegoro University 2022-07-04 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/48978 TEKNIK; Vol. 43, No. 2 (2022): August 2022 ind Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/8395 2015-10-17T03:39:04Z teknik:ART

"150704 2015 eng " 2460-9919 0852-1697 dc PENGARUH ALIH FUNGSI BANGUNAN CAGAR BUDAYA LAWANG SEWU SEMARANG DALAM PERSEPSI MASYARAKAT UNTUK MEWUJUDKAN TUJUAN REVITALISASI Maryati, Iin Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang Rukayah, Siti Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang Sudarwanto, Budi Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang Lawang Sewu; alih fungsi; persepsi; revitalisasi; Semarang; function conversion; public opinion; revilization Penelitian ini dilatarbelakangi karena Lawang Sewu merupakan salah satu bangunan cagar budaya di Kota Semarang yang layak untuk direvitalisasi dalam upaya melestarikannya dan agar tetap fungsional. Telah banyak berbagai usulan alih fungsi Lawang Sewu, diantaranya adalah menjadi hotel, pusat perbelanjaan dan menjadi perkantoran. Pada tahun 2009 diputuskan untuk direvitalisasi menjadi galeri, temporary exhibition room dan menjadi objek wisata heritage. Kemudian dari hal-hal tersebut muncul sebuah tujuan penelitian yaitu mengetahui adanya pengaruh alih fungsi menjadi temporary exhibition room, gallery, dan tetap menjadi objek wisata heritage dalam persepsi masyarakat untuk mewujudkan tujuan revitalisasi. Metode penelitian yang digunakan adalah kuantitatif rasionalistik. Melakukan pengumpulan data salah satunya menggunakan kuesioner yang disebar pada responden. Kemudian diuji menggunakan beberapa langkah uji statistik, salah satunya dengan uji path analysis yang digunakan untuk melihat ada tidaknya pengaruh alih fungsi sebagai variabel mediator dalam persepsi masyarakat untuk mewujudkan tujuan revitalisasi. Pemaknaan hasil temuan menunjukan adanya pengaruh alih fungsi dalam persepsi masyarakat untuk mewujudkan tujuan revitalisasi yang dijelaskan berdasarkan teori yang telah dipaparkan dalam kajian pustaka serta kondisi di lapangan. Kesimpulan yang dapat diperoleh dengan adanya pengaruh alih fungsi dalam persepsi masyarakat untuk mewujudkan tujuan revitalisasi adalah aspek-aspek alih fungsi harus diperhatikan dengan serius bagi berbagai pihak yang akan melakukan kegiatan revitalisasi. [The Influences of Revitalization Heritage Building Lawang Sewu Semarang in Public Opinion to Realize Revitalization Purpose] Lawang Sewu is one of heritage building in Semarang which suitable to have a conservation, especially revitalization to keep the existency of the building. There are a lot of opinions to revitalize Lawang Sewu. Between 2004-2006 this site is going to be used as a hotel, shopping center and full office. Finally in 2009 there was a conclution that Lawang Sewu would be revitalized into gallery, temporary exhibition room and heritage tourist destination. One of the purpose of revitalization is the type of function could give benefits for public, and the heritage building doesn’t become an exclusive place. So the new function that selected has to be a support for the revitalization purpose (Priatmojo, 2009). Thats all the background of this research.The research method that be used is quantitative method. From collecting data’s and using questionnaire for the respondences. The next step is testing those data’s with several test which one of them is path analysis or called Sobel test. Path analysis is an analytic system to see whether the influence of the new function in a heritage building exist as a mediator variable in public opinion to realize revitalization purpose.The result shows that there is influences of a new function in public opinion to realize revitalization purpose. It is explained and based the theory which has been explained in review of the literature and the real situation. It comes to the conclusion that influences is the aspect which need to be taken seriously by who does the revitalization. Diponegoro University 2015-07-04 16:42:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/8395 TEKNIK; Vol 36, No 1 (2015): (Juli 2015) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1699 2012-02-10T06:41:42Z teknik:ART

2460-9919 0852-1697 dc INVENTARISASI PERUBAHAN WILAYAH PANTAI DENGAN METODE PENGINDERAAN JAUH (STUDI KASUS KOTA SEMARANG) Sudarsono, Bambang Change of coastline, Abrasion, Sedimentation and Reclamation The environment change in the coastal area can be caused by nature factors for example abrasion,sedimentation and by human factor for example is coastal reclamation. The environment change in the coastalarea can influence change of coastline.Change of coastline can be evaluated and surveyed based on map and satellite image. The coastline changedetection in Semarang City had been done for several years based on Semarang City’s topographic map (1938)and Quickbird Satellite Image (2006).The research change of coastline carried out by Remote Sensing Method and Geographic Information System.Based on research and field survey in Semarang City, there are significant coastline changes includingabrasion, sedimentation and reclamation.Conclusion can be obtained from this research is the wide change because coastline change in Semarang Cityfrom 1938 until 2006: which caused by reclamation factor and sedimentation factor is equal 502.437 Ha, andabrasion factor is equal 458,323 Ha. Diponegoro University 2012-02-02 14:48:56 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1699 TEKNIK; Volume 32, Nomor 2, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/25307 2020-07-10T16:19:07Z teknik:ART

"200531 2020 eng " 2460-9919 0852-1697 dc Improving The Performance of Alumni Achievement Assessment by Integrating Website-Based Tracer Study Information Systems and Telegram API Sucipto, Sucipto Universitas Nusantara PGRI Kediri http://kuliahkomputer.com http://orcid.org/0000-0003-3412-002X Dewi, Ervin Kusuma National Taiwan University of Science and Technology Resti, Nalsa Cintya Universitas Nusantara PGRI Kediri Santi, Indyah Hartami Universitas Islam Balitar tracer study; API; social messaging; Telegram; web-based It is the mission of Vocational High School (SMK) education in Indonesia to produce highly competitive and skilled graduates. One standard for evaluating the success of vocational education is assessing the achievements of alumni. The evaluation process can be carried out with programmed alumni tracking activities or commonly known as tracer studies. However, the implementations of tracer studies that have been carried out by vocational schools in Kediri are still using the manual method. These conditions make the school find many obstacles in the implementation of tracer studies. Some schools have used technology with e-mail applications but have financial constraints. This research aims to improve the performance of assessing the alumni achievement of Vocational Schools in Kediri by integrating the website-based tracer study information system with social media Telegram API. Usability testing that gave 4.83 of 5 scales has shown that the integration can improve the performance and benefits of an application compared to the application before integration Diponegoro University 2020-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/25307 TEKNIK; Vol 41, No. 1 (2020): May 2020 eng https://ejournal.undip.ac.id/index.php/teknik/article/download/25307/71379 Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2111 2012-02-23T03:14:09Z teknik:ART

2460-9919 0852-1697 dc INVERTER MULTI LEVEL TIPE JEMBATAN SATU FASA TIGA TINGKAT DENGAN MIKROKONTROLER AT89S51 A. Warsito, A. Warsito M. Facta, M. Facta Aptono. T.Y, Aptono. T.Y inverters, multi level inverters, PWM, harmonics, THD, microcontroller. Inverter is a power electronics circuit which is used to convert DC voltage and current to AC voltage andcurrent. In conventional inverter, most commonly used, only has three level voltage, those are +Vdc, -Vdc,and zero. Meanwhile both square inverters and SWPM inverter has big harmonic distortion. In SPWMinverter scheme, high frequency switching must be used to minimize total harmonic distortion (THD). Multilevel inverter is a type of inverter that has more than one level of voltage and current output.The major advantages of multi level inverters are a good voltage waveform, small harmonic dirtortion,switching component operated under low frequency, and it can supply a big power.This paper will discuse the construction of single phase three level multi level inverters, hardware testinginclude output waveform THD, and the comparisson of multilevel inverter with other conventional invertersscheme suc as PWM inverters modulation, and square waveform inverter. Atmel’s AT89S51 microcontrollerused to control switching scheme in this multi level inverter. By this power electronic circuit, it is expected alow cost and reliable multi level inverters prototipe. Diponegoro University 2012-02-10 11:25:01 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2111 TEKNIK; Volume 28, Nomor 2, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/58821 2023-10-12T21:21:38Z teknik:EI

"230830 2023 eng " 2460-9919 0852-1697 dc Front Matter TEKNIK, Editor in Chief Department of Electrical Engineering TEKNIK Artikel editorial ini berisi front-matter TEKNIK Volume 44 Nomor 2 Tahun 2023, yaitu meliputi halaman sampul, fokus dan ruang lingkup TEKNIK, informasi indeksasi, susunan tim penyunting dan mitra bebestari, kata pengantar editor dan daftar isi. Diponegoro University 2023-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/58821 TEKNIK; Vol. 44, No. 2 (2023): August 2023 eng Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/11640 2020-04-17T09:32:03Z teknik:ART

"161231 2016 eng " 2460-9919 0852-1697 dc Penyelesaian Numerik Persamaan Advection Dengan Radial Point Interpolation Method dan Integrasi Waktu Dengan Discontinuous Galerkin Method Sadono, Kresno Wikan Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, persamaan differensial; meshfree; meshles; radial basis point interpolation method; discontinuous Galerkin method; advection equation; differential equation; meshfree; meshless; radial point interpolation method; discontinuous Galerkin method; advection e Persamaan differensial banyak digunakan untuk menggambarkan berbagai fenomena dalam bidang sains dan rekayasa. Berbagai masalah komplek dalam kehidupan sehari-hari dapat dimodelkan dengan persamaan differensial dan diselesaikan dengan metode numerik. Salah satu metode numerik, yaitu metode meshfree atau meshless berkembang akhir-akhir ini, tanpa proses pembuatan elemen pada domain. Penelitian ini menggabungkan metode meshless yaitu radial basis point interpolation method (RPIM) dengan integrasi waktu discontinuous Galerkin method (DGM), metode ini disebut RPIM-DGM. Metode RPIM-DGM diaplikasikan pada advection equation pada satu dimensi. RPIM menggunakan basis function multiquadratic function (MQ) dan integrasi waktu diturunkan untuk linear-DGM maupun quadratic-DGM. Hasil simulasi menunjukkan, metode ini mendekati hasil analitis dengan baik. Hasil simulasi numerik dengan RPIM DGM menunjukkan semakin banyak node dan semakin kecil time increment menunjukkan hasil numerik semakin akurat. Hasil lain menunjukkan, integrasi numerik dengan quadratic-DGM untuk suatu time increment dan jumlah node tertentu semakin meningkatkan akurasi dibandingkan dengan linear-DGM.  [Title: Numerical solution of advection equation with radial basis interpolation method and discontinuous Galerkin method for time integration] Differential equation is widely used to describe a variety of phenomena in science and engineering. A variety of complex issues in everyday life can be modeled with differential equations and solved by numerical method. One of the numerical methods, the method meshfree or meshless developing lately, without making use of the elements in the domain. The research combines methods meshless, i.e. radial basis point interpolation method with discontinuous Galerkin method as time integration method. This method is called RPIM-DGM. The RPIM-DGM applied to one dimension advection equation. The RPIM using basis function multiquadratic function and time integration is derived for linear-DGM and quadratic-DGM. The simulation result shows that this numerical method, close to the results exact well. The results of numerical simulations with RPIM-DGM show, the more nodes and the smaller the time increment, the more accurate the numerical results. Other results showed, integration with quadratic-DGM for a time increment, and a certain number of nodes, further improving accuracy, compared with the linear-DGM.  Diponegoro University 2016-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/11640 TEKNIK; Vol 37, No 2 (2016): (Desember 2016) eng Copyright (c) 2016 Teknik

oai:ojs.ejournal.undip.ac.id:article/1756 2012-02-15T04:03:20Z teknik:ART

2460-9919 0852-1697 dc PENAJAMAN DAN SEGMENTASI CITRA PADA PENGOLAHAN CITRA DIGITAL Awaluddin, Moehammad Darmo Y, Bambang Enhancing Image, . Image segmentation, stretching, lowpass filter, laplace filter, edgesenh filter, clustering Image processing takes an image to produce a modified image for better viewing or some other purposes Imageanalysis takes an image into something other than an image such as number of object types, size of an object,etc.The main purpose of Enhancing Image is to produce image in order to have a suitable image forApplication requirement. Image segmentation is divided into a several segment considering area of the object.We need the Enhancement technique and segmentation to have a good image. In this case , it was trying toprocess image with a several stage , stretching, lowpass filter, laplace filter, edgesenh filter and clustering inSPOT image in aceh coverage area. Diponegoro University 2012-02-02 14:41:15 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1756 TEKNIK; Volume 31, Nomor 1, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/33127 2021-06-03T02:07:01Z teknik:ART

"210503 2021 eng " 2460-9919 0852-1697 dc Design of Manifold with Pressure Controller for Automatic Exchange of Oxygen Gas Cylinders in Hospital Hendryani, Atika Jurusan Teknik Elektromedik, Politeknik Kesehatan Kementerian Kesehatan Jakarta II, http://orcid.org/0000-0002-3658-4947 Nurdinawati, Vita Jurusan Teknik Elektromedik, Politeknik Kesehatan Kementerian Kesehatan Jakarta II, Dharma, Nashrul Jurusan Teknik Elektromedik, Politeknik Kesehatan Kementerian Kesehatan Jakarta II, medical gas; oxygen; manifold; gas pressure; automatic exchange Pengaturan dan suplai oksigen sebagai salah satu gas medis di rumah sakit merupakan hal yang penting untuk menjamin ketersediaan gas tersebut bagi keberlangsungan hidup pasien. Pengaturan gas oksigen di rumah sakit biasanya menggunakan sistem pemipaan dengan manifold. Manifold akan memonitoring tekanan gas oksigen pada setiap tabung. Sistem manifold yang digunakan pada umumnya hanya dapat memonitor tekanan tapi tidak dapat melakukan pertukaran otomatis pada tabung gas jika tekanan berada di bawah ketentuan yang diperbolehkan. Desain sistem manifold yang dikembangkan dilengkapi dengan monitoring tekanan untuk pertukaran otomatis tabung gas oksigen dengan menggunakan sensor tekanan dan mikroprosessor. Hasil pengujian sistem menggunakan pembanding regulator dan barometer menunjukkkan nilai persentase akurasi tekanan sensor 96,92 persen dan 97,16 persen. Pada tekanan di bawah batas 285 KPa manifold dapat melakukan pertukaran tabung gas yang aktif secara otomatis. Pengujian alat secara keseluruhan menunjukkan manifold dapat melakukan pertukaran tabung gas otomatis saat tekanan kurang dari 285 KPa. Hasil tersebut menunjukkan desain manifold yang dibangun dapat bekerja cukup baik.    Diponegoro University 2021-05-03 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/33127 TEKNIK; Vol. 42, No. 1 (2021): May 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4385 2013-01-22T02:50:02Z teknik:ART

"121015 2012 eng " 2460-9919 0852-1697 dc PENGARUH KADAR LUMPUR PADA AGREGAT HALUS DALAM MUTU BETON Purwanto, Purwanto Arni Priastiwi, Yulita Array Clay lumps on the aggregate levels is one of the factors that may cause disruption of the binding process and hardening of concrete. Clay lump can not blend with cement so that blocking a merger between the cement with aggregates which eventually led to the compressive strength of concrete will be reduced in the absence of binding to each other. SK SNI S-04-1989-F, the allowable levels of clay lump maximum of 5% to fine aggregate (sand) and maximum of 1% for coarse aggregate (split). In this study to determine the effect of the clay lump on the fine aggregate content on compressive strength of concrete on five (5) variations levels of the category of clean clay lump with content of 1% and 2%, medium clay lump 4% and dirty sand with levels 7 % and 11%, whereas for the coarse aggregate clay lump content was 0.7%. From the results of a study of 90 cylindrical specimens showed that the small amount of clay lump, the higher the compressive strength of concrete. Concrete compressive strength test results on average with dirty clay lump content was 31.30 MPa, compressive strength for the concrete medium with clay lump levels were at 33.92 MPa and compressive strength for the concrete clean of clay lump 36.68 MPa. Compared to the dirty clay lump an increase in the levels of average compressive strength for moderate levels of 8,37% and the clean sand of 17,19%. Besides affecting in compressive strength, clay lump levels also affect the weight of concrete, and concrete density. The greater the level of clay lump, weight of concrete and concrete density will be lower. Compared to the dirty clay lump an increase in the levels of average concrete density for moderate levels of 6,54 % and the clean sand of 12,59%. Diponegoro University 2012-07-12 10:30:29 https://ejournal.undip.ac.id/index.php/teknik/article/view/4385 TEKNIK; Volume 33, Nomor 2, Tahun 2012 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/65276 2025-04-17T01:00:27Z teknik:ART

"240830 2024 eng " 2460-9919 0852-1697 dc Nalarsih, Retno Tri Departement of Civil Engineering, Universitas Veteran Bangun Nusantara, Jl. S. Humardani No.1, Sekoharjo,57521 https://sinta.kemdikbud.go.id/profile Banjir yang terjadi di Kijang Kota, Kecamatan Bintan Timur, Kabupaten Bintan dipengaruhi oleh kecepatan angin, kelembaban udara, temperatur, elevasi, dan tekanan udara yang mengakibatkan curah hujan tinggi, mempengaruhi infiltrasi, genangan, dan kinerja drainase. Penelitian ini menggunakan metode spasial HECRAS untuk mendapatkan area banjir dan genangan diikuti pendekatan Sistem Dinamik (SD). Hasil spasial yang diintegrasi model SD memberikan strategi yang terarah, secara real time. Hasil simulasi HECRAS sepanjang drainase Hilir hingga Hulu terjadi banjir, berkarakter genangan. Solusi drainase longstorage dan di Kampung Pisang dipasang pintu klep drainase sekunder ke primer dan kesepakatan konservasi SDA yang terintegrasi pemeliharaan drainase serta lahan semak belukar menambah DTA. Keuntungan unik dari model HECRAS dan SD adalah program konservasi bekerja maksimal saat mengintervensi infiltrasi sebesar 30%, artinya kinerja konservasi dalam penyelesaian masalah drainase harus dilakukan sebesar 30% dari keseluruhan kegiatan konservasi tersebut. SD mampu membuat simulasi dan solusi secara real time, dimana Submodel berikutnya nilai genangan turun sehingga beban drainase turun, dari kedua sub model tersebut terbukti bahwa nilai rawan banjir turun, dapat selesai pada tahun ke 4, dan tahun berikutnya harus membuat pengembangan solusi sesuai kebutuhan konservasi dan kinerja drainase. Diponegoro University 2024-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/65276 TEKNIK; Vol 45, No 2 (2024): August 2024 ind Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/13654 2020-04-17T09:35:44Z teknik:ART

"180731 2018 eng " 2460-9919 0852-1697 dc Solusi Jalan Satu Arah di Kota Yogyakarta Romadhona, Prima J. Jurusan Teknik Sipil dan Perencanaan, Universitas Islam Indonesia kinerja ruas jala; satu arah; derajat jenuh jalan; VISSIM Berbanding linear dengan pesatnya pembangunan tata guna lahan yang ada, Yogyakarta berkembang menjadi suatu kota modern dengan mobilitas yang tinggi. Namun, infrastruktur jalan di Kota Yogyakarta saat ini belum dapat memfasilitasi penambahan kendaraan bermotor yang sangat cepat sehingga kemacetan menjadi hal yang sering dilihat di beberapa lokasi. Kebijakan jangka pendek yang bisa ditempuh untuk mengurangi kemacetan adalah melakukan sistem jalan satu arah. Artikel ini memuat kajian kinerja simulasi jalan satu arah pada dua loop terindentifikasi kemacetan, yaitu Loop I: Jalan Prawirotaman-Sisingamangaraja-Parangtritis- Menukan dan Loop II: Jalan Pramuka- Gambiran Selatan-Perintis Kemerdekaan Barat. Data primer berasal dari survei kecepatan dan volume kendaraan pada kedua loop tersebut dan didukung oleh data sekunder yang diperoleh dari Dinas Perhubungan Kota Yogyakarta. Kedua datatersebut menjadi materi untuk disimulasikan dengan software PTV VISSIM sehingga didapatkan kinerja jalan sebelum dan sesudah menggunakan metode satu arah. Hasilnya, terjadi peningkatan kinerja dengan menurunnya derajat jenuh sebesar55% dan peningkatan kecepatan hingga mencapai 19% pada ruas jalan yang diberlakukan manajemen lalu lintas satu arah. Di sisi lain penerapan lalu lintas satu arah berefek pada penurunan kinerja pada ruas jalan di sekitarnya dengan meningkatnya derajat jenuh sebesar4% tapi terjadi peningkatan kecepatan 5% di ruas jalan yang lain lagi. Diponegoro University 2018-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/13654 TEKNIK; Vol 39, No 1 (2018): (July 2018) eng Copyright (c) 2018 Teknik

oai:ojs.ejournal.undip.ac.id:article/1868 2012-02-15T03:26:54Z teknik:ART

2460-9919 0852-1697 dc PENURUNAN KANDUNGAN PHOSPHAT PADA LIMBAH CAIR INDUSTRI PENCUCIAN PAKAIAN (LAUNDRY) MENGGUNAKAN KARBON AKTIF DARI SAMPAH PLASTIK DENGAN METODE BATCH DAN KONTINYU (Studi Kasus : Limbah Cair Industri Laundry Lumintu Tembalang, Semarang) Wisnu Wardhana, Irawan Siwi Handayani, Dwi Ika Rahmawati, Dessy wastewater of laundry industry, phosphate, adsorption,active carbon from plastic rubbish Increasing the number of laundry industry influences on the increasing of detergent utilizzation. Thedominant substance contained in the detergent is Natrium Tripolyphosphat, a builder and surfactant.Therefore the waste contains Phosphate. Most of the laundry industry throw their waste without treatmentfirst. The waste would cause Eutrofication where the water body became rich of dissolved nutrient,descending of the dissolved oxygen and capability of water body assist power to water biota. Lumintu isone of the laundry industries which located in Tembalang district. According to the result of preexperiment,industrial waste water containes 10,21 mg/l phosphate. This value exceeds standard quality ofPerda Prov. Jateng no. 10 year 2004 about maximum value for total of phosphate is 2 mg/l. One ofwastewater treatment method is adsorption using the active carbon from plastic rubbish kind ofPolyethylene. This reseach purposes to know the capability of active carbon from plastic rubbish inreducing phosphate content with batch and column operation. The batch operation use 1,2 and 3 gramvariation weight active carbon from plastic rubbish for 30 - 60 mesh and 100 - 200 mesh variation mediasize. The batch operation has 45,45 % from the highest phosphate efficiency lowering on the 3 gram.Otherwise, column operation need 1 inch column diameter with 50 ml/minute and 100 ml/minute debitvariation. Continue trial had 54,75 % from the highest phosphate efficiency lowering on the 50 ml/minute.Constant value speed (k1) is 0,0108 ml/mg.s with capacity of adsorption (qo) 0,677 mg/g. Diponegoro University 2012-02-02 14:36:47 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1868 TEKNIK; Volume 30, Nomor 2, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/35960 2021-12-16T21:29:52Z teknik:ART

"211217 2021 eng " 2460-9919 0852-1697 dc Kamiel, Berli Paripurna Program Studi Teknik Mesin Universitas Muhammadiyah Yogyakarta Malik, Muhammad Malik Nadziful Krisdiyanto, Krisdiyanto Pompa sentrifugal adalah sebuah mesin fluida yang banyak digunakan di dunia industri yang dalam penggunaannya kerap terjadi kavitasi. Kavitasi berdampak pada penurunan performa pompa sehingga dapat mengganggu proses produksi. Oleh karena itu dibutuhkan metode deteksi kavitasi yang efektif dan akurat. Pada umumnya deteksi kavitasi berbasis sinyal getaran menggunakan analisis spektrum. Namun demikian metode tersebut tidak efektif kerena menghasilkan spektrum yang kontinyu dan tersebar pada bentang frekuensi lebar. Hal ini menyebabkan deteksi kavitasi yang berdasarkan pada peak amplitudo frekuensi karakteristik menjadi sulit dilakukan. Penelitian ini bertujuan mengembangkan metode deteksi kavitasi melalui pendekatan machine learning dengan algoritma decision trees berbasis sinyal getaran. Tidak seperti pada analisis spektrum, metode deteksi ini lebih efektif karena berdasarkan pada klasifikasi pola sinyal getaran dan lebih mudah digunakan karena memberikan status kavitasi atau non-kavitasi secara langsung. Sinyal getaran direkam dari sebuah akselerometer yang diletakkan pada tutup impeler pompa sentrifugal pada sebuah rig uji sistem perpipaan loop tertutup. Sembilan parameter statistik diekstrak dari domain waktu sinyal getaran kemudian digunakan sebagai input decision trees. Hasil penelitian menunjukkan bahwa decision trees dengan menggunakan parameter statistik terpilih, efektif mendeteksi empat status kondisi pompa dengan tingkat akurasi mencapai 97,2% sedangkan dalam perspektif mendeteksi antara  kondisi non-kavitasi dan kavitasi akurasinya mencapai 100%. Diponegoro University 2021-12-17 04:29:52 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/35960 TEKNIK; Vol 42, No. 3 (2021): December 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/6725 2014-12-24T02:20:43Z teknik:ART

"131203 2013 eng " 2460-9919 0852-1697 dc KORELASI PENURUNAN MUKA TANAH DENGAN PENURUNAN MUKA AIR TANAH DI KOTA SEMARANG Yuwono, Bambang Darmo Staf Pengajar Jurusan Teknik Geodesi Fakultas Teknik Univesitas Diponegoro Array The characteristics of the pattern of land subsidence need to be mapped for the purposes of planning and structuring the city as well as taking appropriate actions in anticipating and mitigating the impact. These characteristics can be determined by combining the land subsidence measurements done with various methods such as levelling, GPS, direct measurement and InSAR. Land subsidence that occurred in Semarang had a rate that varied between 0 - 13 cm / year with an increasing trend towards the north east (northeast) of Semarang. The areas which had a high rate of land subsidence between 9 -13 cm / year included PRPP, Tanjungmas, Terboyo and Kaligawe. In this paper will show spatial distribution of landsubsidence which have identical pattern  with the change of ground water level .Observations GPS method has a high correlation with changes in ground water level reaches 0.956 compared with InSAR observations, GPS, direct observation Diponegoro University 2013-12-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/6725 TEKNIK; Volume 34, Nomor 3, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67532 2025-07-07T19:46:40Z teknik:TE

"250322 2025 eng " 2460-9919 0852-1697 dc The Role of Algae in Biofuel Production: Potentials, and Challenges for Sustainable Transportation Sari, Dessy Agustina Universitas Diponegoro and Universitas Singaperbangsa Karawang https://scholar.google.co.id/citations?user=yPO1EdQAAAAJ&hl=id https://orcid.org/0000-0002-8737-3429 Djaeni, Moh. Universitas Diponegoro https://scholar.google.co.id/citations?hl=id&user=-VkHHksAAAAJ https://orcid.org/0000-0002-8002-6627 Hadiyanto, Hadiyanto Universitas Diponegoro https://scholar.google.co.id/citations?hl=id&user=E7gX_8wAAAAJ&view_op=list_works&sortby=pubdate Prasetyaningrum, Aji Universitas Diponegoro https://scholar.google.co.id/citations?hl=id&user=gLD7TX8AAAAJ https://orcid.org/0000-0001-7849-167X Algae Biofuel; Bioenergy Policy; Carbon Sequestration; Energy Transition; Genetic Engineering. This study aims to explore the potential of algae for sustainable biofuel production by examining their molecular biology and the use of advanced cultivation techniques. As concerns over greenhouse gas emissions and rising transportation energy costs grow, algae offer a promising alternative for fuel derived from both food and non-food sources. This review looks at the main biological pathways involved in making biofuels from algae. It focuses on species diversity, lipid content, and new technologies like photobioreactors and magnetic nanoparticle harvesting. The results showcase noteworthy advancements in biotechnology and genetic engineering that boost algae productivity and fuel yield, while also critically examining the environmental impacts such as CO2 emissions and water use, as well as the economic and policy challenges through a life cycle analysis. Adopting a global perspective, this review emphasizes the role of international collaboration and technology transfer in overcoming barriers. Conclusion: Algae-based biofuels hold considerable potential for reducing CO2 and supporting sustainable transportation, yet scaling up production and lowering costs remain challenges. Future research should focus on improving integrated biorefinery platforms, exploring CO2 capture, and promoting international partnerships. Diponegoro University 2025-02-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67532 TEKNIK; Vol 46, No 1 (2025) January 2025 eng https://ejournal.undip.ac.id/index.php/teknik/article/download/67532/221024 https://ejournal.undip.ac.id/index.php/teknik/article/download/67532/221025 Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/22765 2020-04-17T09:37:57Z teknik:ART

"191111 2019 eng " 2460-9919 0852-1697 dc Putra, Satya Andika Novrinaldi, Novrinaldi Gabah merupakan produk hasil pertanian berupa biji-bijian yang proses pengeringannya mayoritas masih menggunakan cara tradisional yaitu dengan menghamparkan langsung dibawah sinar matahari. Pengeringan seperti ini tidak sesuai ketika musim hujan karena proses pengeringan gabah tidak berlangsung dengan baik sehingga kualitas gabah menurun. Solusinya adalah dengan menggunakan pengering. Salah satu tipe pengering yang dapat digunakan untuk gabah adalah pengering tipe swirling fluidized bed (SFB). Alat pengeringan gabah tipe SFB terdiri dari ruang pengeringan dan ruang plenum dengan diameter 400 mm, selubung tengah pada ruang pengeringan berbentuk kerucut dengan diameter 300 mm, selubung tengah ruang plenum berbentuk silinder diameter 300 mm, distributor terletak diantara ruang pengeringan dan plenum yang terdiri dari 100 sudu dengan kemiringan 45°, dan dua saluran masuk udara berbentuk silinder yang masing-masing dilengkapi dengan pemanas dan blower dengan laju udara suplai 12 m3 /menit. Artikel ini menyajikan analisis energi panas pada alat pengeringan gabah tipe SFB. Analisis dilakukan secara teoretis berdasarkan prinsip-prinsip termodinamika dan perpindahan panas dengan menggunakan beberapa data hasil pengujian. Data diperoleh dari mengeringkan 300 gram gabah jenis Ciherang selama 60 menit. Hasil analisis menunjukkan bahwa energi yang dibutuhkan untuk mengeringkan gabah dari kadar air 26,8 % menjadi 13,78 % adalah sebesar 121.756,04 J. Laju perpindahan panas dari udara pengering ke gabah sebesar 780,28 W. Sedangkan energi panas yang harus disuplai oleh pemanas adalah sebesar 3943,86 W Diponegoro University 2019-11-11 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/22765 TEKNIK; Vol 40, No. 2 (2019): Agustus 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1935 2012-08-08T06:08:30Z teknik:ART

2460-9919 0852-1697 dc TEKNIK – Vol. 29 No. 2 Tahun 2008, ISSN 0852-1697 139 *) Staf Pengajar Jurusan D III Teknik Sipil Fakultas Teknik Undip TEGANGAN SEKUNDER PADA STRUKTUR RANGKA BATANG Purba, Parhimpunan primary stresses, secondary stresses, trusses, axial load, bending, moment distribution In our previous analysis of trusses, it was always assumed that the truss members are joined by idealhinges and that loads are applied only at joints. The centroidal axes all of members are stright,coincide with the lines connecting the joint center, and lie in a plane that also contains the lines ofaction of all the loads and reaction. Thus the members of truss are subjected to axial force only, andthese can be determined by static method. A stress analysis base on these assumtion leads to thedetermination of so – called “primary stresses”.In actual cases the joint are usually riveted or welded; and because of this fact the members undergo,not only axial forces, but also bending stresses from secondary moment, cuased by this condition arecalled “secondary stresses”. In discusing secondary stresses we shall consider only trussses in oneplane and assume that this plane represents the plane of symmetri for all members and that externalloads are acting in the same plane. Of these the most important are caused by the fact that the jointare rigid, and hence the members are not free to change their relative directions when the truss isdeformed. This problem can likewise be solved very eficiently by means of moment distibution.From the first analyze result, it was obtained the scondary tension ratio with the primary tension at thepull shaft about 19.20 %. This result is significant that it will increase the existence of primary tension.At the analyze by SAP 2000 is obtained that the end tension much more lower than the scondarytension in the first analyze. This is need to obtain attention at planning trusses. Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1935 TEKNIK; Volume 29, Nomor 2, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/8160 2015-01-31T15:17:50Z teknik:EI

"141230 2014 eng " 2460-9919 0852-1697 dc Front-matter Tudjono, Sri Diponegoro University 2015-01-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/8160 TEKNIK; Vol 35, No 2 (2014): (Desember 2014) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1685 2012-02-10T07:42:07Z teknik:ART

2460-9919 0852-1697 dc KAJIAN PELESTARIAN KAMPUNG KAUMAN KUDUS SEBAGAI KAWASAN BERSEJARAH PENYEBARAN AGAMA ISLAM Nurini, Nurini Conservation, Heritage, Kauman Village Historic area as a cultural heritage is one of the most precious relic of the past, because of the presence ofbuildings and the character of its surroundings have historical value that displays a visual story of a certainplace. As one of the cities central to the spread of Islam in Java “Kauman Village, Kudus” has a specialcharacter and a specific Islamic cultural heritage, whether in the form of tangible or intangible heritage and theabstract that needs to be maintained.The purpose of this study is to assess the potential of the cultural heritage of the “Kauman Village, Kudus” inan effort to preserve and protect cultural heritage based on its characteristic as an area central to the spread ofIslam in the region. Diponegoro University 2012-02-02 14:47:08 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1685 TEKNIK; Volume 32, Nomor 1, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/25850 2020-07-10T16:19:15Z teknik:ART

"200531 2020 eng " 2460-9919 0852-1697 dc Quality of Service Analysis of Long Term Evolution Network in Frequency Division Duplexing Mode in Semarang City Rahmatika, Annisa Rossy Sukiswo, Sukiswo Widianto, Eko Didik http://orcid.org/0000-0003-4708-737X QoS; LTE FDD; Axence netTools;urban area Penelitian ini bertujuan untuk menganalisis Quality of Service (QoS) jaringan telekomunikasi Long Term Evolution (LTE) Frequency Division Duplexing (FDD) di daerah kota dan sub-urban di Kota Semarang. Penelitian melakukan pengamatan terhadap kualitas jaringan telekomunikasi LTE FDD dari segi responsivitas jaringan atau ping, packet loss, delay dan throughput pada layanan upload dan download dari sisi pengalaman pengguna berdasarkan variasi jarak dari eNodeB. Pengamatan kualitas dilakukan terhadap QoS jaringan telekomunikasi LTE FDD menggunakan aplikasi  Axence NetTools dan Oakla Speed Test pada jam sibuk di masing-masing eNodeB. Hasil penelitian disajikan berdasarkan variasi jarak dan menunjukkan kualitas packet loss dan delay tergolong sangat baik berdasarkan ITU-T G.114, yaitu berturut-turut di bawah 3% dan 150 milidetik. Pengujian ping tergolong baik berdasarkan ketentuan control plane LTE, yaitu 50 milidetik di tiap titik. Throughput layanan adalah antara 16,98-19,01 Mbps untuk upload dan 17,34 – 23.29 Mbps untuk download. Diponegoro University 2020-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/25850 TEKNIK; Vol 41, No. 1 (2020): May 2020 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/25850/73356 Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2042 2012-02-21T04:37:23Z teknik:ART

2460-9919 0852-1697 dc RISK ANALYSIS STUDY OF NOx, and SOx FROM TRANSPORTATION (CASE STUDY: MAIN STREETS OF D.I. JOGJAKARTA) Arief Budihardjo, Mochamad NO2, SO2, risk analyze, Jogjakarta The air pollution problems have been progressively set attention to the world especially industrialcountries recently. These problems not only give affect at health like emphysema, bronchitis, and otherinhalation disease but also make plants and properties destruction causes very big loss. This research isconcerned with the risk level which is accepted by people who reside in roadside because most of airpollutants come from transportation facilities such as motor vehicle. The limitation of the research is airpollutants exposure such like NOx, and SOx which enter the body through respiration. This risk analysisresearch is broken down into four step as follow; hazard identification showing NO2, and SO2concentration in 15 sampling locations where the highest value of NO2 is 56,5 μg / m3 and SO2 is 28,87μg/m3. According to DIY Governor Regulation No. 153 Year 2002 about the value of ambient air qualitystandard, quality standard of NO2 is 400 μg / m3, and SO2 is 900 μg / m3. It can be concluded thatconcentration of NO2 and SO2 in 2005 within all sampling locations is still under of quality standard. Thestep of exposure assessment involves the exposed population including pedicab worker, park worker, andcloister merchant. From calculation, the intake range of NO2 enters the body is 0,0025-0,0075 mg/kg.dayand SO2 is 0,0008-0,0038 mg/kg.day. Third step is dose-response assessment to find out what will be facedby people if exposure of pollutants occurs in a certain dose. The last step is risk characterization, theresult of research is that risk value / Hazard Index (HI) less than 1 that still acceptable. It can besummarized that the ambient air quality of Jogjakarta especially NO2 and SO2 gas do not too adverse tohealth. Diponegoro University 2012-02-10 11:26:10 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2042 TEKNIK; Volume 28, Nomor 1, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/34007 2023-06-25T22:39:35Z teknik:ART

"230531 2023 eng " 2460-9919 0852-1697 dc Ramli, Muhammad Department of Mining Engineering, Universitas Hasanuddin Djamaluddin, Djamaluddin Thamrin, Meinarni Qaidahiyani, Nirmana Fiqra Kawasan Gowa-Takalar adalah pedataran pantai yang umumnya tersusun atas material endapan aluvial dan pantai. Material tersebut membentuk akuifer bebas yang telah dieksploitasi secara intensif sejak tahun 1990-an. Data kimia air tanah dua tahun terakhir mengindikasikan pengaruh intrusi air laut ke dalam akuifer. Hubungan antara pergantian musim hujan dan musim kemarau dengan sifat akuifer bebas merupakan kondisi penting untuk menjaga keberlanjutan air tanah di kawasan ini. Evaluasi perubahan kapasitas akuifer oleh potensi pengimbuhan karena perubahan musim telah dilakukan dengan pemodelan numerik menggunakan Visual MODFLOW Flex. Hasil simulasi menunjukkan bahwa imbuhan yang masuk ke dalam sistem akuifer pantai Gowa-Takalar didominasi oleh imbuhan dari sungai pada bulan Juli – September, sedangkan Oktober – Juni oleh infiltrasi dari air hujan Diponegoro University 2023-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/34007 TEKNIK; Vol. 44, No. 1 (2023): May 2023 ind Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/10087 2020-04-17T09:31:36Z teknik:ART

"160730 2016 eng " 2460-9919 0852-1697 dc Perbandingan Karakteristik Lempung Kasongan dan Godean Sebagai Bahan Baku Industri Gerabah Kasongan Winarno, Tri Program Studi Teknik Geologi, Fakultas Teknik Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang Kasongan; Godean; karakteristik lempung; gerabah; Kasongan; Godean; clay characteristic; pottery Kasongan adalah salah satu sentra industri keramik dan gerabah di Yogyakarta yang terletak di Desa Bangunjiwo, Kecamatan Kasihan, Kabupaten Bantul. Pada saat ini industri keramik dan gerabah Kasongan mengalami kesulitan bahan baku lempung dikarenakan cadangan lempung di Desa Bangunjiwo yang selama ini digunakan semakin berkurang jumlahnya. Berdasarkan studi pustaka diketahui bahwa di Godean terdapat cadangan lempung, sehingga perlu diteliti apakah bisa digunakan sebagai bahan baku dalam industri keramik dan gerabah. Metode yang digunakan untuk menguji karakteristik lempung tersebut adalah dengan analisis XRD, XRF, analisis tingkat kecerahan, analisis ukuran butir dan pengujian pembuatan gerabah dari lempung tersebut. Hasil penelitian menunjukkan mineral lempung penyusun lempung Bangunjiwo adalah kaolinit dan haloisit, sedangkan di Godean terususun atas kaolinit, haloisit dan smektit. Dalam pengujian pembuatan gerabah dengan lempung dari kedua daerah tersebut menunjukkan perbedaan hasil, dimana lempung dari Godean menghasilkan gerabah yang tidak menyerupai ciri khas gerabah Kasongan yang berwarna merah terang. Dengan demikian lempung dari Godean tidak bisa digunakan sebagai pengganti bahan baku industri gerabah Kasongan. [Title: The Characteristic Comparison of Kasongan Clay and Godean Clay as Raw Material in Kasongan pottery Industry] Kasongan is the center of ceramics and pottery industry in Yogyakarta,located in Bangunjiwo village, Kasihan District, Bantul Regency. Nowadays, the ceramics and pottery industry is difficult to find the raw material because of the decrease of the Bangunjiwo clay deposit. Based on literature review, there are clay deposits found in Godean which can be observed their characteristics as basic commodity in the ceramics and pottery industry. The methods apllied in this research are XRD and XRF analysis,brightness analysis, grain size analysis and making pottery from those clays.The result of the research shows that the clay in Bangunjiwo consists of kaolinite and halloysite, while clay in Godean consists of kaolinite, halloysite and smectite. The pottery products made from those clays show different characteristics. The clay from Godean does not show bright red colour as the Kasongan clay. So the clay from Godean can not be used as the alternative raw material for the Kasongan pottery industry.   Diponegoro University 2016-07-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/10087 TEKNIK; Vol 37, No 1 (2016): (Juli 2016) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1745 2012-02-15T04:03:20Z teknik:ART

2460-9919 0852-1697 dc EFFECT OF NITROGEN SOURCE AND INITIAL SUGAR CONCENTRATION ON LACTIC ACID FERMENTATION OF PINEAPPLE WASTE USING L.DELBRUECKII Moch Busairi, Abdullah lactic acid, l. delbrueckii, nitrogen source , pineapple waste, sugar concentration. The liquid pineapple waste contains mainly sucrose, glucose, fructose and other nutrients. It therefore can potentially be used as carbon source for lactic acid fermentation. The lactic acid is utilised in food technology as pH regulator, microbial preservative, buffering agent and in the chemical industry. Recently, lactic acid has been considered to be an important raw material for production of biodegradable lactate polymer. The experiments were carried out in batch fermentation at anaerobic condition with stirring speed: 50 rpm, temperature: 40 oC, pH: 6.0, and inoculum size: 5%. Effect of nitrogen source and initial sugar concentration were studied. The effect of nitrogen source on lactic acid production shows that the yeast extract is highest yield , followed by urea , corn steep liquor, malt sprout and ammonium sulphates with the yield of 78.52; 26.68; 19.14; 14.10 and 5.6 %, respectively. The highest yield of initial sugar concentration on lactic acid production obtained was 78.52 % (54.97 g/l) at 70 g/l, if the concentration of sugar was increased to 110 g/l , the lactic acid production or yield decrease to51.53 g/l or 54.24%. Diponegoro University 2012-02-02 14:41:15 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1745 TEKNIK; Volume 31, Nomor 1, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/27922 2021-05-06T06:54:02Z teknik:ART

"201128 2020 eng " 2460-9919 0852-1697 dc Toward Sustainable Preservation of Cultural Heritage Buildings: A Combination of Digital Mapping and Architectural mapping for Omah Pencu in the Historic Area of Kudus Kulon Suprapti, Atik Department of Architecture, Faculty of Engineering, Diponegoro University https://scholar.google.com/citations?user=21un4LMAAAAJ&hl=en http://orcid.org/0000-0002-3739-749X Sejati, Anang Wahyu Department of Urban and Regional Planning, Faculty of Engineering, Diponegoro University Sardjono, Agung Budi Department of Architecture, Faculty of Engineering, Diponegoro University Pandelaki, Edward E. Department of Architecture, Faculty of Engineering, Diponegoro University Malik, Abdul Department of Architecture, Faculty of Engineering, Diponegoro University Huwaida, Nurma Mediasri Department of Architecture, Faculty of Engineering, Diponegoro University mapping; living heritage; preservation; Omah Pencu; community This study aims to map the existence of the wooden houses of Omah Pencu and classifies their potencies as heritage buildings in the historic area of Kudus Kulon. Caring for indigenous cultural heritage will contribute to the strengthening of local identity. The traditional houses of Omah Pencu have been developing as the specific architecture since the end of the 17'th century, as a living place of the ‘Gusjigang' community, and artifacts evident of the city heyday. However, the pressure of modernization-capitalization in the city caused several changes in their built environment and decreased the number of Omah Pencu. This research concern with the GIS interpretation methods and the direct observations use the questionnaire, interview, and architectural documentation. The findings provide an important database for preservation in the digital era. The digital mapping, combined with the mapping of tangible and intangible buildings, produces digital information about the Omah Pencu building condition that has never been done before. Through this mapping, found that the participation effort of the community caused the sustainability of preservation. It is a very significant bottom-up participation.  However, toward sustainable preservation, a strategy, planning, design, and management that integrated all stakeholders and resources by utilizing digital technology are needed. Diponegoro University 2020-11-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/27922 TEKNIK; Vol 41, No. 3 (2020): December 2020 eng Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/3791 2012-07-18T09:07:20Z teknik:ART

"120409 2012 eng " 2460-9919 0852-1697 dc KARAKTERISASI BLOK REM KERETA API BERBAHAN BESI COR DAN Al-SiC BERDASARKAN KEKUATAN UJI TARIK DAN HARGA IMPAK Senen, Senen Bayuseno, A.P. Array The train is currently trusted by the people of Indonesia as a cheap and safe means of transportation. One fromthat must be met by a train is a reliable braking system. Generally the train brake block material is used graycast iron brake block.One of materials based composite as a substitute for train brake block are the Al-SiC (Aluminium SilicaCarbida). The Al-SiC composite material has hard and soft properties. Aluminium (Al) as a matrix and SiC asreinforcement. Metal material composite used for the reseach is Al-SiC composite with composition of SiC 15%,10%, and 15% made through a process of stir casting. The specimens were tested tensile strength and impacttests. The test of results : tensile test for cast iron = 188.56 MPa; aluminium = 131.97 MPa; Al-SiC 5% =127.17 MPa, 10% = 136.41 MPa dan 15% = 107.26 MPa. The result of the energy absorbed of impact test arecast iron = 2.17 Joule; aluminium = 8.67 Joule; Al-SiC 5% = 4.00 Joule, 10% = 4.67 Joule and 15% = 2.83Joule.From the result of test, so replacement of cast iron brake material block is composite brake material block witha composition 10% of AL-SiC. Diponegoro University 2012-07-12 10:29:15 https://ejournal.undip.ac.id/index.php/teknik/article/view/3791 TEKNIK; Volume 33, Nomor 1, Tahun 2012 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/52415 2025-04-24T18:11:04Z teknik:ART

"240613 2024 eng " 2460-9919 0852-1697 dc Analysis of the Application Time Cost Trade-Off Method on Tug Boat 135 GT Repair Projects Owned by PT. Pelabuhan Indonesia II Santosa, Ari Wibawa Budi Department of Naval Architecture, Faculty of Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Trimulyono, Andi Firnandito, Anugrah Subekti, Joko Hadi, Eko Sasmito Crashing Project; Duration Acceleration; Time Cost Trade-Off In the project implementation process, there is still the possibility of delays, as in the case of the Tanjung Buyut I Tug Boat ship repair project - 206 135 GT calculations are needed to accelerate the project to determine the optimum time and cost. One method that can be used in accelerating projects / crashing projects is the Time Cost Trade-Off method. This method can be used to solve this problem by adding specific alternatives such as working hours, labor, and other things with the minimum additional cost. In this study, an alternative acceleration was carried out by adding manpower and working hours duration of 1 to 4 hours which would be applied to the Hull repair project for the Tug Boat Tanjung Buyut I-206 135 GT. Based on the results of the analysis that has been carried out on the work of the Hull section, which is included in the critical activity, it is obtained that the most optimum duration acceleration is the addition of working hours (overtime) for 3 hours and an additional workforce of 24 peoples which results in an acceleration of time of 17 days from the normal duration of 60 days to 43 days with a time efficiency of 28%, as well as a cost reduction of IDR 19,700,000 or around 3.34% compared to the normal duration fee of IDR 571,950,000 to IDR 552,250,000. Diponegoro University 2024-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/52415 TEKNIK; Vol. 45, No. 1 (2024): May 2024 eng Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/13213 2020-04-17T09:34:25Z teknik:ART

"171229 2017 eng " 2460-9919 0852-1697 dc Penentuan Potensi Sumberdaya Batu Gamping Sebagai Bahan Baku Semen Daerah Gandu Dan Sekitarnya, Kecamatan Bogorejo, Kabupaten Blora, Jawa Tengah Widiarso, Dian Agus Departemen Teknik Geologi, Universitas Diponegoro Kusuma, Istiqomah Ari Departemen Teknik Geologi, Universitas Diponegoro Fadhlillah, Ajiditya Putro Departemen Teknik Geologi, Universitas Diponegoro semen; batugamping; stratigrafi regional;batu lempung karbonan; kristalin batupasir kuarsa Kebutuhan pembangunan infrastruktur selalu meningkat seiring dengan pertumbuhan penduduk. Industri konstruksi membutuhkan batugamping yang merupakan bahan pembuatan semen untuk pondasi konstruksi bangunan. Salah satu daerah yang memiliki potensi batu gamping adalah daerah Gandu, Kecamatan Bogorejo, Blora, Jawa Tengah. Penelitian ini bertujuan untuk melakukan eksplorasi potensi batu gamping di daerah Gandu. Pemetaan geologi dilakukan untuk menentukan litologi utama daerah penelitian dan distribusinya. Analisis kualitas batugamping juga dilakukan dalam penelitan ini, dengan  mengkaji komposisi kimia batugamping. Diharapkan hasil penelitian ini dapat digunakan sebagai dasar pemanfaatan batugamping untuk kebutuhan industri semen. Hasil penelitian menunjukkan bahwa stratigrafi regional area penelitian terdiri dari empat satuan batuan, yaitu batulempung karbonan, batugamping, kristalin batupasir kuarsa, dan batugamping. Hasil penelitian juga menunjukkan bahwa batugamping dari daerah Gandu memiliki unsur CaO cukup besar dan unsur Mg sedikit, walaupun di beberapa tempat banyak ditemukan unsur Mg. Perbandingan hasil analisis komposisi kimia dan standar bahan baku semen menunjukkan bahwa kapur di daerah Gandu memenuhi kriteria bahan baku semen Diponegoro University 2017-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/13213 TEKNIK; Vol 38, No 2 (2017): (Desember 2017) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1825 2012-02-15T03:18:19Z teknik:ART

2460-9919 0852-1697 dc PENGENDALIAN MESIN HOIST HANGER DALAM PROSES PTC/ED MENGGUNAKAN PLC OMRON Wahyudi, Wahyudi As’ari, M. Hasim PLC Omron, Hoist Hanger The development of technology demands efficient and work speed, so it needs a system which can handleseveral things.This problem can be covered with PLC (Programmable Logic Control) that can integrateseveral self standing component to be an integrated control system and can be changed the configurationwithout change all instrument. Modify the ladder program can alter system of PLC. This paper showsHoist Hanger system in PTC/ED (Pre Treatment Chemical/Electrocoat Dispotition) process that controlledby PLC. Above input from limit switch, sensor, or the other input, PLC system drives the motorrelay Hoist Hanger machine. That cause the motor relay Hoist Hanger change its condition, so the movingof Hoist Hanger machine will be suitable with PLC program. Diponegoro University 2012-02-02 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1825 TEKNIK; Volume 30, Nomor 1, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/39108 2021-08-29T17:46:58Z teknik:ART

"210826 2021 eng " 2460-9919 0852-1697 dc Experimental study of the Effect of the Blades of Number on Characteristics Pico Bulb Turbine on Horizontal Flow Himawanto, Dwi Aries Jurusan Teknik Mesin, Fakultas Teknik, Universitas Sebelas Maret Nurdin, Akhmad Program Studi Teknologi Pengecoran Logam, Politeknik Manufaktur Ceper Bisri, Hasan Jurusan Otomotif, SMKN 1 Sine Ngawi propeller; number of blades; dynamic head; bulb Pada penelitian ini, dibahas pengaruh jumlah sudu terhadap peforma turbin propeller aliran horisontal pada skala kecil secara eksperimental. Saat ini perkembangan turbin air skala kecil mengalami banyak kemajuan, termasuk turbin air dengan aliran horisontal. Turbin air pada aliran horisontal dapat diaplikasikan pada saluran irigasi, saluran sistem perpipaan, saluran instalasi pengolahan air limbah, dan saluran-saluran tertutup lainnya. Pengukuran dynamic head pada aliran horisontal berdasarkan  nilai pressure drop atau perbedaan tekanan sebelum dan sesudah turbin. Bulb statis yang diletakkan sebelum turbin bertujuan meningkatkan kecepatan aliran air dan berpotensi meningkatkan kinerja turbin. Penelitian ini bertujuan untuk mengetahui pengaruh jumlah sudu  terhadap peforma dan efisiensi turbin propeller. Kemiringan sudu yang digunakan 200 dengan bulb ratio 0,6 terhadap diameter pipa. Variasi jumlah sudu yang digunakan 4, 5, 6, dan 7 buah dengan masing-masing diuji pada debit 7 L/s, 9 L/s, 11 L/s, dan 13 L/s. Hasil penelitian ini menunjukkan jumlah sudu 5 dengan debit 13 L/s menghasilkan peforma turbin terbaik dibandingkan dengan jumlah sudu lainnya, selain itu jumlah sudu 5 dengan debit 13 L/s menunjukkan nilai efisiensi terbaik sekitar 40%. Diponegoro University 2021-08-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/39108 TEKNIK; Vol. 42, No. 2 (2021): August 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/5636 2017-07-19T17:16:57Z teknik:ART

"130913 2013 eng " 2460-9919 0852-1697 dc UNJUK KERJA REAKTOR PLASMA DIELECTRIC BARRIER DISCHARGE UNTUK PRODUKSI BIODIESEL DARI MINYAK KELAPA SAWIT Yudhistira, Ardian Dwi Istadi, Istadi Array Biodiesel is one of alternative renewable energy source to substitute diesel fuel. Various biodiesel production processes through transesterification reaction with a variety of catalysts have been developed by previous researcher. This process still has the disadvantage of a long reaction time, and high energy need. Dielectric Barrier Discharge (DBD) plasma electro-catalysis may become a solution to overcome the drawbacks in the conventional transesterification process. This process only needs a short time reaction and low energy process. The purpose of this study was to assess the performance of DBD plasma rector in making biodiesel such as: the effect of high voltage electric value, electrodes gap, mole ratio of methanol / oil, and reaction time. The Research method was using GC-MS (Gas Cromatography-Mass Spectrofotometry) and FTIR (Fourier Transform Infrared Spectrofotometry) and then it will be analysed the change of chemical bond between reactant and product. So, the reaction mechanism can be predicted. Biodiesel is produced using methanol and palm oil as reactants and DBD plasma used as reactor in batch system. Then, reactants contacted by high voltage electric. From the results of this research can be concluded that the reaction mechanism occurs in the process is the reaction mechanism of cracking, the higher of electric voltage and the longer of reaction time lead to increasing of product yield. The more of mole ratio of methanol / oil and widening the gap between the electrodes lead to decreased product yield. From this research, product yield maksimum is 89,8% in the variable of rasio mol metanol/palm oil 3:1, voltage 10 kV, electrode gap 1,5 cm, and reaction time 30 seconds. Diponegoro University 2013-10-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/5636 TEKNIK; Volume 34, Nomor 2, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67990 2025-07-07T19:30:43Z teknik:ART

"250331 2025 eng " 2460-9919 0852-1697 dc Pakpahan, Samuel Seprian Department of Civil Engineering, Diponegoro University, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Sachro, Sri Sangkawati Suharyanto, Suharyanto Karian Reservoir is a multipurpose reservoir designed to meet raw water needs, provide irrigation water supply, reduce flooding, and generate micro-hydropower potential. It has a dead storage capacity of 46.4 million m³ with a projected service life of 100 years, based on the time required for sediment to fill the dead storage. The planned sedimentation rate of 579,162 m³/year was determined using an empirical formula derived from sediment curves based on tributary surveys conducted in 1995. If sedimentation exceeds dead storage capacity, the reservoir's lifespan and ability to meet water demands will be compromised, making it crucial to analyze sedimentation rates and distribution. Erosion rate analysis using the USLE method for the period 2017-2023 resulted in an average erosion rate of 1,249,177.27 tons/year, with a Sediment Delivery Ratio of 0.304 and a trap efficiency of 95%, leading to a sedimentation rate of 328,397.28 tons/year. The sediment deposition distribution over 100 years, estimated using the Empirical Area Reduction Method, indicated that the new base level would rise by 10.17 meters to an elevation of 30.17 meters. The remaining dead storage capacity is 21.12 million m³ (45.48%), with an effective storage capacity of 112.83 million m³ (96.38%). Theoretically, Karian Reservoir can still achieve its full service life. . Diponegoro University 2025-03-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67990 TEKNIK; Vol 46, No 2 (2025) April 2025 ind Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/22916 2020-04-17T09:39:00Z teknik:ART

"190531 2019 eng " 2460-9919 0852-1697 dc The Development of Autonomous Humanoid Soccer Robot Afrisal, Hadha Munadi, Munadi Faris, Muhammad Ardi Sumbodo, Bakhtiar Alldino robot; humanoid; soccer; autonomous; ball detection Penelitian ini bertujuan mengembangkan robot humanoid untuk permainan sepakbola secara otomatis. Robot humanoid yang dikembangkan tersusun atas 20 sendi yang digerakkan dengan motor servo dynamixel berjenis AX-12 (bagian tubuh atas) dan RX-24 (bagian tubuh bawah), serta dikontrol menggunakan board servo-controller CM-700 (ATMega2561). Robot humanoid memiliki tinggi 44 cm serta dilengkapi dengan sistem keseimbangan menggunakan sensor gyro LPR530 dan akselerometer KXM52-1050. Untuk mengenali objek dan bernavigasi secara otomatis, robot humanoid menggunakan sistem sensor visual berbasiskan kamera CMOS dengan board CMUCAM (LPC2106). Pengujian menunjukkan bahwa robot humanoid pemain bola yang dikembangkan mampu berjalan dengan kecepatan rata-rata 14.37 cm/detik dan memiliki kecepatan maksimal 20 cm/detik. Robot humanoid yang dikembangkan mampu bermain bola secara otomatis: yakni mampu mendeteksi keberadaan bola, mendeteksi lokasi gawang, serta menendang bola ke arah gawang dan mencetak gol. Diponegoro University 2019-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/22916 TEKNIK; Vol 40, No. 1 (2019): Mei 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1919 2012-02-24T11:23:19Z teknik:ART

2460-9919 0852-1697 dc STUDI PEMANFAATAN ENERGI GELOMBANG LAUT UNTUK PEMBANGKIT LISTRIK Suyadi, Suyadi sea wave energy, electrical plan system In the case of the exploration on renewal energy sources and non fossil energy sources, the writer hasmade a concept of development method in using sea wave for electrical plant as an effort to develop theelectrical plant system by using renewal energy sources. This system uses pontoon to press the sea waterinto tanks, then the generated pressure is used to move turbine. Cylinder pontoon may be floated byproducing maximum heave at the type weight = 0,65. At this type weight surge and pitching movement cannot be reduced until zero, however it may reduces the other movements like rolling and translating, namelyby: DL < 0,615H and DL < 0,175λ, the buoyancy value is 75,4% from its diameter sink in the water or thevolume buoyancy of the floated part that is 15% from the total volume of cylinder. The energy that may beboosted depends on the pontoon's weight which can be pulled by one way of wave, amplitude, and naturalperiod of the wave. The research gives method of electrical energy and estimation and boosting boosted byone way of wave. The result of energy estimation which can be boosted for wave length is 1,20 m and waveheight is 0,50 meter, the energy that can be boosted is 0,02Kw, for wave length 4,00 meter and wave height2,00 meter, the energy that can be boosted is 23,06Kw for wave length 4,00 meter and wave height 8,00meter the energy that can be boosted is 737,89Kw. Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1919 TEKNIK; Volume 29, Nomor 1, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/38536 2022-09-19T00:37:33Z teknik:ART

"220713 2022 eng " 2460-9919 0852-1697 dc Purwanto, Edi Department of Architecture, Diponegoro University https://scholar.google.com/citations?view_op=list_works&hl=id&user=MkQPWc4AAAAJ Darmawan, Very Membangun kota yang layak huni telah menjadi tujuan penting akibat dampak dari urbanisasi yang terjadi pada kota-kota besar di Indonesia. Upaya untuk mengukur kepuasan masyarakat terhadap kota layak huni di kota-kota besar tersebut bermanfaat untuk perencanaan dan perancangan kota serta untuk pembuatan kebijakan mengenai pembangunan kota layak huni kedepannya. Namun demikian bukti ilmiah tentang seberapa besar tingkat kepuasan masyarakat terhadap kota layak huni yang mereka tempati masih belum banyak. Penelitian ini bertujuan menganalisis indikator penentu kepuasan dalam menilai kota layak huni dengan mengambil objek kota Semarang dengan  menggunakan metode Importance Performance Analysis. Temuan penelitian memberikan penjelasan bahwa tingkat kepuasan responden terhadap status kota Semarang sebagai kota layak huni secara total sebesar 64,61%. Berdasarkan hasil penelitian yang diperoleh, dari 30 indikator kota layak huni, terdapat 11 indikator dengan prioritas tinggi dengan kinerja kepuasan rendah dan menjadi prioritas perhatian pemerintah kota Semarang. Diponegoro University 2022-07-04 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/38536 TEKNIK; Vol. 43, No. 2 (2022): August 2022 ind Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/27209 2020-04-17T09:40:40Z teknik:ART

"191231 2019 eng " 2460-9919 0852-1697 dc Ardianingsih, Retno Kumoro, Andri Cahyo Analisis rheologi perlu dilakukan terhadap slurry propelan untuk mengetahui viskositas dan castability-nya. Hal ini berpengaruh pada tingkat homogenitas dan nilai Isp sebagai karakteristik utama propelan padat komposit. Penelitian ini bertujuan untuk mengetahui karakteristik rheologi slurry propelan berbasis HTPB dan DOA menggunakan analisis viskositas.  Metode pengukuran viskositas dilakukan dengan parameter suhu, waktu curing dan shear rate. Hasil pengukuran menunjukkan bahwa viskositas menurun dengan kenaikan suhu dan juga sebaliknya, viskositas meningkat dengan bertambahnya waktu curing. Melalui persamaan Power Law, diperoleh Koefisien konsistensi (K) antara 2,1148-2,2877 yang nilainya meningkat seiring dengan turunnya temperatur. Bertambahnya nilai K mengartikan energi yang dibutuhkan oleh unit operasi untuk mencetak propelan ke dalam tabung cetakan juga semakin meningkat. Sedangkan nilai indeks sifat alir (n) antara 0,1535 - 0,5128 menunjukkan bahwa slurry propelan merupakan fluida Non-Newtonian dengan perilaku shear-thinning (pseudoplastik) karena n<1 Diponegoro University 2019-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/27209 TEKNIK; Vol 40, No. 3 (2019): Desember 2019 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1967 2012-02-24T11:16:25Z teknik:ART

2460-9919 0852-1697 dc PENERAPAN TEKNOLOGI INFORMASI UNTUK PEMERINTAH DAERAH Iman Satoto, Kodrat Array In developed countries like the United States and European countries, the application of informationtechnology in the areas of government have been significantly in creating a clean government andtransparent. Some examples include the implementation of the model B2B (business to business ecommerce)applications for the procurement of goods and services electronically (e-procurement), theshort message technology to accelerate the delivery of information and web-services to facilitate otherparties to get information although different technology and platform.Meanwhile, in our countries, the application of information technology in the field of governance is stillvery limited. This is because the source of funds and skilled human resources are very limited. Someexamples of the application of information technology that is already there; Portal made for each office,portals for profile local government and application for one stop services. Most of the local governmentbuild the system information partially so can occurred distortions such as inconsistencies of information.Apparently there has been no local government in Indonesia that utilize ICT (information andcommunication technology) extensively to achieve good governance.It is time for local governments to apply information technology, which currently is very mature to be ableto realize the government is clean and transparent. Starting with building a complete database (datacenter),followed by developing applications that require each local government office and eventually builtan executive information system that can generate strategic information needed to help make decisions. Diponegoro University 2012-02-02 14:39:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1967 TEKNIK; Volume 29, Nomor 3, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/48278 2023-06-25T22:39:35Z teknik:ART

"230531 2023 eng " 2460-9919 0852-1697 dc Mangalla, Lukas Kano Department of Mechanical Engineering, Universitas Halu Oleo, Jl. HEA Mokodompit Anduonohu Kendari 93232 Indonesia https://orcid.org/0000-0003-4416-6531 Sisworo, Raden Rinova Pagiling, Luther Penelitian ini difokuskan untuk perbaikan kualitas biomassa limbah kayu jati melalui proses torefaksi microwave dan mengamati parameter penting untuk meningkatkan densitas energi dan energy efisiensi dari bahan baku dalam menghasilkan bioarang berkualitas. Pengujian ini dilakukan dalam sebuah tabung reaktor 250 mL yang diletakkan dalam pemanas microwave dengan mengalirkan gas inert dan non-inert. Pemanas microwave yang digunakan beroperasi pada frekuensi 2,45GHz dengan variasi daya masing-masing 540W, 720W, dan 900W. Selama proses torefaksi gas nitrogen (inert) dialirkan ke dalam reaktor dengan Laju 0,125 mL/min dan untuk media udara (non-inert) dialirkan secara alami. Pengamatan terhadap temperatur dalam reaktor dilakukan setiap kenaikan 0.5 menit selama 20 menit menggunakan termokopel Type-K. Perubahan massa dan sifat produk torefaksi diamati dan dianalisis untuk memprediksi korelasi kenaikan nilai kalor, massa dan energi tersisa dengan daya operasi pemanasan microwave. Hasil penelitian menunjukkan bahwa dengan meningkatnya daya operasi torefaksi microwave maka nilai kalor dan densitas energi bahan produk meningkat signifikan sedangkan massa sisa dan energi tersisa cenderung menurun. Media udara sangat potensial sebagai pengganti gas nitrogen yang mahal untuk melakukan torefaksi microwave biomassa kayu jati. Diponegoro University 2023-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/48278 TEKNIK; Vol. 44, No. 1 (2023): May 2023 ind Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/9686 2015-12-09T05:21:40Z teknik:EI

"151210 2015 eng " 2460-9919 0852-1697 dc Frontmatter Istadi, Istadi teknik Diponegoro University 2015-12-09 12:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/9686 TEKNIK; Vol 36, No 2 (2015): (December 2015) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1736 2012-02-10T06:29:29Z teknik:ART

2460-9919 0852-1697 dc PENGARUH PERUBAHAN KECEPATAN KAPAL TERHADAP TINGGI PERMUKAAN AIR DI SISTEM FLUIDA DI DALAM PALKA PADA KAPAL IKAN MUATAN HIDUP TIPE KATAMARAN DENGAN PENDEKATAN CFD Sasmito Hadi, Eko Manik, Parlindungan Iqbal, M. Catamaran,CFD, lively fish hold. The existence and the use of live fish hold system, can help fishermen to reduce the operating costs in fishpreservation 11.8%. The live fish hold system, which fish hold were given circulation hole so the water insideand outside the hatch is connected, there should be researched about the changes and differences in pressurethat happened when the ship moves.Initial condition where the ship is not moving, surface of water in the fish hold will be the same height with adraught of ship. When the ship began to move out, the pressure of fish hold will decrease along with increasingthe speed of the ship. This will caused a decrease of water surface elevation in fish hold.According the calculation and analysis we found on the speed of 12 knots the water surface elevation in hold ispositive with a value 0,3947 m on to 0,20 m diameter of hole circulation (before variation), 0,4515 m on to 0,15m diameter of hole circulation, 0,4656 m onto 0,25 m diameter of hole circulation, 0,4718 m on to 0,20 mdiameter of two pieces of hole cilculation and -0,9410 m for manual calculation with all variations.The optimum hole circulation was chossen at two pieces of diameter of 0,20 m because on the speed 12 knots,the water elevation is 0,4718 m. This value is the higest among the other variations of the cilculation hole Diponegoro University 2012-02-02 14:47:46 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1736 TEKNIK; Volume 32, Nomor 3, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/23932 2020-10-05T05:21:02Z teknik:ART

"200831 2020 eng " 2460-9919 0852-1697 dc Sistem Kontrol Injeksi Arus pada Inverter Berbasis Metode Proportional Integral Saputra, Eko Wirahadi Departemen Teknik Elektro, Universitas Diponegoro Hermawan, Hermawan Departemen Teknik Elektro, Universitas Diponegoro Setiawan, Iwan Departemen Teknik Elektro, Universitas Diponegoro inverter; kontrol arus; proportional integral; dsPIC30F4011; ACS712-05 Saat ini energi terbarukan yang bersumber dari energi hijau terus dikembangkan dan dioptimalkan. Khusus pemanfaatan energi terbarukan dengan keluaran daya DC, maka secara praktis diperlukan sistem  inverter agar bisa digunakan sebagai pengganti sumber energi daya AC. Agar bekerja secara optimal, secara internal dalam sebuah sistem inverter sumber tegangan, perlu dilengkapi sistem umpan balik arus. Salah satu metode pengontrolan arus inverter yang relative popular adalah metode kontrol Proporsional-Integral. Dalam penelitan ini, dirancang inverter satu fasa tipe Full Bridge dengan metode kontrol proportional-integral menggunakan mikrokontroler 16-bit dsPIC30F4011. Dengan sensor arus ACS712-05B arus keluaran inverter diumpan-balikkan. Pengujian dilakukan dengan variasi beban 8 Ω dan 10 Ω, dengan memvariasikan sejumlah nilai parameter kp dan ki. Berdasarkan hasil pengujian metode proportional integral untuk pengontrollan arus pada inverter satu fasa memiliki respon sistem cepat dan relative stabil. Diponegoro University 2020-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/23932 TEKNIK; Vol 41, No. 2 (2020): August 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2145 2012-02-24T03:05:04Z teknik:ART

2460-9919 0852-1697 dc KEPUASAN MAHASISWA TERHADAP “SERVICE QUALITY” DI FAKULTAS TEKNIK UNIVERSITAS DIPONEGORO MENGGUNAKAN METODE “STUDENT SATISFACTION INVENTORY” Fanani R, Zainal Santoso, Haryo Lusiana, Ina customer satisfaction orientation, importance score, Importance-Satisfaction Matrix, performance gap, satisfaction score and Student Satisfaction Inventory College is a service industry providing service activities of higher education, where quality of service andproduct have must be committed to customer satisfaction orientation. Diponegoro University as one of TheState University which is located in Semarang Central Java become research object at this research about thequality of service education.This research uses Student Satisfaction Inventory method which was developed by Noel Levitz. This methodmeasure service quality based on eleven dimension, there are Academic Advising, Campus Climate, CampusLife, Campus Support Services, Concern for the Individual, Instructional Effectiveness, Recruitment andFinancial Aid Effectiveness, Registration Effectiveness, Campus Safety and Security, Service Excellence, andStudent Centeredness.The research was done by survey of student satisfaction. The sample are student of Technical Faculty UNDIPwhich is taken proportionally from 8 study program of Engineering Faculty in UNDIP. There are two differentscore for each item on the survey, the importance score, and the satisfaction score. The assessment of qualityservice education based on the difference in the importance score and satisfaction score, so called withperformance gap score.The result shows that the highest importance score is campus supports service (4.65), the highest satisfactionscore is campus climate (3.29) and the highest performance gap is campus support services (1.61). Value oftotal mean performance gap is 1.44. According to the guidelines provided by Noel Levitz, a performance gapbetween zero and 1.50 indicates that the institution (UNDIP) is almost meeting students expectation. From theperspective of engineering students, Electrical Engineering student feel most satisfied to service educationgiven by UNDIP than student from other engineering majors. The other result of this research indicates thatthere are 14 variables from 66 variables has high priority to be improved. Diponegoro University 2012-02-10 11:25:01 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2145 TEKNIK; Volume 28, Nomor 2, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/59405 2025-04-24T18:11:04Z teknik:ART

"240613 2024 eng " 2460-9919 0852-1697 dc Pambudi, Yan Ahmad Christy Department of Civil Engineering, Faculty of Engineering, Diponegoro University, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia, 50275 Sriyana, Ignatius Bendungan Rukoh merupakan bendungan urukan tipe zonal inti kedap air yang mempunyai kelemahan rentan terjadi kegagalan bendungan akibat overtopping limpasan debit banjir. Kondisi terkini berdasarkan Dokumen Kajian Risiko Bencana Kabupaten Pidie 2014-2018 menerangkan bahwa tingkat frekuensi kecenderungan risiko banjir mengalami kenaikan dari tahun ke tahun yang disebabkan hujan lebat. Penelitian ini bertujuan untuk menganalisis pembaharuan debit banjir menggunakan pemodelan HEC-HMS dan melakukan evaluasi keamanan bendungan terhadap overtopping melalui penelusuran banjir. Penelusuran banjir menggunakan metode level pool routing pada kondisi debit banjir Bendungan Rukoh tanpa suplesi debit dan kondisi dengan suplesi debit Bangunan Pengarah Rukoh. Pemutakhiran debit banjir menunjukkan adanya rerata kenaikan nilai debit banjir tiap kala ulang sebesar 14,87% dibandingkan studi perencanaan. Penelusuran banjir debit banjir 1000 tahun memberikan hasil elevasi muka air maksimum +122,77 (tanpa suplesi) dan +123,27 (suplesi), sedangkan hasil untuk debit banjir PMF (Probable Maximum Flood) pada elevasi +124,08 (tanpa suplesi) dan +124,52 (suplesi). Berdasarkan elevasi puncak bendungan +127,00 dan penelusuran banjir disimpulkan Bendungan Rukoh aman terhadap overtopping. Diponegoro University 2024-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/59405 TEKNIK; Vol. 45, No. 1 (2024): May 2024 ind Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/15408 2020-04-17T09:34:09Z teknik:ART

"170701 2017 eng " 2460-9919 0852-1697 dc Economic Contribution of Regional Feeder Ports to The Local Economy In Indonesia Syabri, Ibnu Regional and Urban Infrastructure System Research Group, School of Architecture, Planning, and Policy Development, Bandung Institute of Technology Widyanarko, Pritta Andrani regional feeder port, influence, regional economy Indonesia regional feeder ports’ main function is to serve marine transport activities between regency/city in a province in limited quantities. The intention of the government to make marine transportation as the backbone of national logistic transportation system puts these ports to an important position, as suppliers for the main and/or collector ports and as goods distribution centers for the region from the bigger ports. Not only as a provider of accessibility between regions, regional feeder ports should be seen as an investation to boost regional economy. This study aims to explain the influences of regional feeder ports on regency/city economy, based on the port types: (1) cargo ports, and (2) cargo & passengers ports. Results showed that both types of ports have positive influences on the regency/city economy, although it is not related to region’s economic base sector. Cargo ports which are mainly located on west area of Indonesia, supports the region’s economy more than cargo & passenger ports which are mainly located on the east. Diponegoro University 2017-07-01 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/15408 TEKNIK; Vol 38, No 1 (2017): (Juli 2017) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1808 2012-02-15T03:18:19Z teknik:ART

2460-9919 0852-1697 dc STEEL-SLAG AS SUBSTITUTE TO NATURAL AGGREGATES, PROPERTIES AND THE INTERFACIAL TRANSITION ZONE Lie, Han Ay Jurusan Teknik Sipil Fakultas Teknik Universitas Diponegoro slag, fine and coarse aggregates, compression and tensile strength Steel-slag is a residual product of the steel industry that has potential ability to pollute the ground water and soil containing heavy metals. To overcome this problem, attempts have been made for using the slag as substitute for both coarse and fine aggregates in concrete. The solidification process will prevent the metal components from polluting the water and soil. Test results on the mechanical properties of slag-concrete showed that while the compression strength of slag-concrete increased significantly as a function of slag-to-natural aggregate’s use, the tensile strength dropped accordingly. The substitution of fine-slag to Muntilan sand was even more negative, the compression strength decreased as a function of slag use. Research into the influences of the Interfacial Transition Zone was conducted, since the ITZ itself forms a weak link within the concrete matrix. The SEM tests were performed at the Quarter Laboratory, Department of Geology in Bandung using a Scanning Electron Microscope type JEOL. Diponegoro University 2012-02-02 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1808 TEKNIK; Volume 30, Nomor 1, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/37221 2021-08-29T17:46:58Z teknik:ART

"210826 2021 eng " 2460-9919 0852-1697 dc The development of a588 modified laterite steel using thermomechanical and low-temperature tempering process for weather resistant steel Rohmah, Miftakhur Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia https://scholar.google.com/citations?user=pAWVY2cAAAAJ&hl=en https://orcid.org/0000-0002-6375-3267 Irawan, Dedi Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia Utama, Dedi P. Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia Romijarso, Toni B. Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia lateritic steel a-588; martensite tempered; low temperature temper; thermomechanical Baja laterit A-588 berpotensi dirujuk sebagai baja paduan rendah-berkekuatan tinggi untuk aplikasi baja tahan cuaca. Baja Laterit A-588 dikembangkan melalui proses termomekanikal yang diikuti proses penemperan guna mendapatkan kekuatan dan ketahanan korosi tinggi. Penelitian ini bertujuan untuk mengetahui korelasi antara penambahan kadar nikel, variasi laju pendinginan pada saat perlakuan panas terhadap sifat mekanik dan ketahanan korosi baja laterit A-588. Baja laterit dengan variasi kadar nikel 0,42%; 1%, 2%, dan 3%, mengalami proses homogenisasi, pengerolan panas, perlakuan panas dengan tiga variasi pendinginan yaitu media air, oli, dan udara, yang kemudian diproses temper pada temperatur 150 ℃. Temper temperatur rendah menyebabkan pengendapan karbida halus dan transisi fasa martensit menjadi bainit, sehingga struktur mikro akhir berupa bainit, lath martensit temper, karbida, dan ferrit. Kadar nikel 3% dengan laju pendinginan cepat akan meningkatkan pembentukan fasa lath martensit temper dan bainit, sehingga kekuatan dan kekerasan cenderung meningkat serta regangan dan ketahanan korosi semakin menurun akibat reaksi galvanic. Sifat mekanik paling optimal diperoleh pada sampel 2% nikel dengan media air (kekuatan 1203 MPa, regangan 10%, kekerasan 404 BHN, laju korosi 1,306 mpy). Diponegoro University 2021-08-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/37221 TEKNIK; Vol. 42, No. 2 (2021): August 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4819 2013-05-06T03:51:24Z teknik:ART

"130402 2013 eng " 2460-9919 0852-1697 dc BENTUK KERJASAMA PUBLIC-PRIVATE PEMBANGUNAN GRAVING DOCK DAN MANAJEMEN GALANGAN KAPAL DENGAN METODE ANALYTICAL HIERARCHI PROCESS (AHP) Hartono, Hartono Hidayat, Arif Dwi H, Jati Utomo Array In paper Development of port infrastructure in Indonesia is now no longer the responsibility of central government, along with limited funds and the government's insistence seaport infrastructure needs. To accelerate economic growth, the government issued Government Regulation as a legal umbrella. The purpose of this study was to examine public-private partnership opportunities in the construction of graving dock and shipyard management. Targets do is review, the criteria are prioritized cooperation and cooperation priorities.This study used qualitative and quantitative approach, a descriptive qualitative approach through interviews used to assess the normative aspect. The quantitative approach used to assess the priority criteria forms of cooperation and public-private partnership in development graving dock and shipyard management by using the Analytical Hierarchy Process (AHP). Based on the AHP analysis can be concluded that the experts disagree about the priority criteria of cooperation, where the majority of them choose the duration as the main criterion. As for the analysis of priorities of the cooperation of all experts choose Built-Operate-Transfer (BOT), which is deemed suitable for long-term investment of up to 30 years. BOT puts private partners to more freely to finance, construct, operate, anticipated rate of return on capital (rate of return) and the risks of commercial and regulatory aspects Diponegoro University 2012-08-08 13:06:31 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/4819 TEKNIK; Volume 34, Nomor 1, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67929 2025-07-07T19:30:43Z teknik:ART

"250331 2025 eng " 2460-9919 0852-1697 dc Evaluation of Soil Water Assessment Tool (SWAT) Model Accuracy in Estimating Erosion and Sedimentation Rates in the Sutami Reservoir Watershed Wijaya, Hendri Department of Civil Engineering, Faculty of Engineering, Diponegoro University, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Wulandari, Dyah Ari Department of Civil Engineering, Faculty of Engineering, Diponegoro University, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Suripin, Suripin Department of Civil Engineering, Faculty of Engineering, Diponegoro University, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Erosion; Sedimentation; SWAT (Soil and Water Assessment Tool); Watershed; Reservoir The storage capacity of the reservoir is affected by poor management of the Watershed (DTA), which in turn influences erosion and sedimentation levels. In 1972, the erosion rate at Sutami Reservoir was 0,18 mm/year, rising to 1.44 mm/year by 2022. This data reflects a significant increase in the erosion rate within the Sutami Reservoir watershed, highlighting the need for effective watershed management modeling. The Soil and Water Assessment Tool (SWAT) is commonly used for watershed management assessment. This study aims to predict erosion and sedimentation rates using SWAT and evaluate the accuracy of its simulations through calibration and validation. The simulation results from SWAT show that the total erosion rate is 5,280.45 tons/ha/year, with a total sedimentation of 11,662,851.94 tons/year. Additionally, These results were compared with an analysis using the USLE method, which indicated an erosion rate of 5,178.98 tons/ha/year and sedimentation of 11,060,798.14 tons/year. The comparison of both methods showed similar outcomes, suggesting that the SWAT model provides reasonably accurate predictions. The calibration process, using observed discharge data from 2022 and SWAT-simulated discharge, yielded an NSE value of 0.778, classified as 'very good.' On the other hand, validation using discharge data from 2023 and SWAT-simulated discharge yielded an NSE value of 0.660, classified as "good." Based on these results, the SWAT simulation offers a reliable representation of calibration and validation, making it an appropriate model for this study. Diponegoro University 2025-03-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67929 TEKNIK; Vol 46, No 2 (2025) April 2025 eng Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/17657 2020-04-17T09:36:54Z teknik:ART

"181231 2018 eng " 2460-9919 0852-1697 dc Total chromium removal from electroplating wastewater using Artocarpus Altilis leaves as adsorbent with continuous flow Hardoyo, Hardoyo Deparment of Environmental Engineering, Malahayati University Prilitasari, Nurbaiti Marsas Deparment of Environmental Engineering, Malahayati University Natalina, Natalina Deparment of Environmental Engineering, Malahayati University electroplating waste water; adsorption; Artocarpus altilis leaf; Cr The Electroplating wastewater the contain chromium (Cr) was one of hazardous waste to the environment. That waste have to treated before discharge to the environment.  One of the treatment of the Cr-containing wastewater was adsorption.  The leaf and stem of Artocarpus altilis  have potentially used as a adsorbent to treatment Cr-containing wastewater.  The process activated on the production of adsorbent could be done by acid and non acid process. The purpose of this research were to known the potential of Artocarpus altilis leaf to adsorpt the total-Cr in the electroplating wastewater.  The research was done using a 12cm length of 1,3 cm diameter of pipe reactor with up-flow continuously stream. The debit were used in this research was  0.255 cm3/det. The total-Cr were measured by Atomic Absorption Spectophotometer(AAS).  The research result show that the absorption using adsorbent that produced by acid process could be reduced total-Cr from 77.45 mg/l to 0.47mg/l (99.34%), while the absorption using adsorbent that  produced by non acid-process could be reduced total-Cr from 77.45mg/l to 4,75 mg/l (93,86%) only. The absorption using Artocarpus altilis leaf adsorbent that produced by acid-adsorbent could be used to treatment of Cr-containing electroplating wastewater, because  the treated-concentration from this process was lower than 0.5 mg/l (according on Quality standard PERMEN LH No 5, 2014. Diponegoro University 2018-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/17657 TEKNIK; Vol 39, No. 2 (2018): Desember 2018 eng Copyright (c) 2019 Teknik

oai:ojs.ejournal.undip.ac.id:article/1896 2012-02-24T11:23:19Z teknik:ART

2460-9919 0852-1697 dc PROSPEK INDUSTRI GALANGAN KAPAL DALAM NEGERI GUNA MENGHADAPI PERSAINGAN GLOBAL Windyandari, Aulia maritime industry The development planning of maritime industry at the national level, the objectives, the vision, the mission,the strategy and the government policy that empower maritime industry potential is very important beimplemented effectively by all component of maritime industry, especially shipyard community inIndonesia. The main and strategic problems have to be solved immediately with the systematic plan. Thisarticle will be focused to the condition, contribution, challenge and prospect of shipbuilding industry tosupport maritime exploration program for the total development of maritime industry that able to competethe foreign shipbuilding industry. Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1896 TEKNIK; Volume 29, Nomor 1, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/44579 2025-07-07T19:35:10Z teknik:ART

"220531 2022 eng " 2460-9919 0852-1697 dc Analysis of CaCO3 Impregnation on HY Zeolite Surface Area, Pore Size, and Activity in the Catalytic Cracking of Palm Oil to Biofuels Febriansyar, Rosyad Adrian Department of Chemical Engineering, Universitas Diponegoro https://orcid.org/0000-0002-1447-8043 Riyanto, Teguh Department of Chemical Engineering, Universitas Diponegoro Laboratory of Plasma-Catalysis (R3.5), Center of Research and Services - Diponegoro University (CORES-DU), Universitas Diponegoro https://orcid.org/0000-0002-3553-4219 Istadi, I. Department of Chemical Engineering, Universitas Diponegoro Laboratory of Plasma-Catalysis (R3.5), Center of Research and Services - Diponegoro University (CORES-DU), Universitas Diponegoro https://orcid.org/0000-0002-2914-3545 catalyst activity; biofuel; calcium carbonate; deoxygenation Fossil energy sources are currently decreasing, requiring the development of alternative energy sources. Vegetable oil is a raw material for alternative renewable energy supplies. This study produced biofuels from vegetable oil using calcium carbonate (CaCO3)-impregnated HY catalysts. In addition, this study aimed to investigate the effect of CaCO3 impregnation on the surface area and the catalytic activity of catalysts in the palm oil cracking process to produce biofuels. The HY catalyst was modified by the wet impregnation method in 5 wt% CaCO3 solution and was further calcined at 550°C for three h. Furthermore, the catalysts were tested in a continuous fixed-bed catalytic reactor at 450°C. The catalyst properties were characterized using Brunauer–Emmett–Teller (BET) surface area, Barrett–Joyner–Halenda (BJH) for pore size distribution, and X-Ray Diffraction (XRD) for crystal structure and phases. The results showed that the addition of CaCO3 decreased surface area and pore volume; however, the pore size increased, which resulted in the production of heavy hydrocarbons. Interestingly, the introduction of CaCO3 enhanced the yield of Organic Liquid Product (OLP) and diesel-range hydrocarbons selectivity to reach 79.09% and 30.54%, respectively. Furthermore, the introduction of CaCO3 increased deoxygenation activity. Diponegoro University 2022-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/44579 TEKNIK; Vol. 43, No. 1 (2022): May 2022 eng Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/7196 2015-02-01T00:14:06Z teknik:ART

"141230 2014 eng " 2460-9919 0852-1697 dc PERENCANAAN DAN PENGANGGARAN KAMPUS BERKELANJUTAN: GREEN CAMPUS UNIVERSITAS DIPONEGORO Hapsari, Irma Dewi Magister Ilmu Ekonomi dan Studi Pembangunan, Fakultas Ekonomi, Universitas Diponegoro, Jl. Erlangga Tengah No.17, Kampus Undip Pleburan, Semarang Sumarjiyanto BM, Nugroho Magister Ilmu Ekonomi dan Studi Pembangunan, Fakultas Ekonomi, Universitas Diponegoro, Jl. Erlangga Tengah No.17, Kampus Undip Pleburan, Semarang Purwanti, Evi Yulia Magister Ilmu Ekonomi dan Studi Pembangunan, Fakultas Ekonomi, Universitas Diponegoro, Jl. Erlangga Tengah No.17, Kampus Undip Pleburan, Semarang Array Green campus adalah sistem pendidikan, penelitian, dan pengabdian masyarakat yang ramah lingkungan serta melibatkan warga kampus dalam aktifitas lingkungan yang dapat memberikan manfaat positif bagi lingkungan, ekonomi, dan sosial. Tujuan penelitian ini adalah: (1) Menganalisis penerapan green campus di Undip berdasarkan tiga dimensi utama pembangunan berkelanjutan yaitu lingkungan, ekonomi, dan sosial; (2) Menentukan alternatif strategi kebijakan yang terbaik dalam penerapan green campus di Undip untuk terciptanya kampus Undip yang berkelanjutan; serta (3) Membuat perencanaan anggaran keberlanjutan kampus Undip. Metode analisis yang digunakan adalah analisis deskriptif kualitatif dan kuantitatif. Alat analisis yang digunakan adalah metode Analytical Hierarchy Process (AHP) dengan bantuan Expert Choice versi 11. Berdasarkan hasil analisis bahwa penerapan green campus di Undip sudah dilakukan dengan baik, tetapi belum diintegrasikan secara menyeluruh. Kebijakan-kebijakan yang dilakukan oleh Undip, secara keseluruhan belum dapat memberikan manfaat positif bagi lingkungan, ekonomi, dan sosial, sehingga kampus Undip belum dapat dikatakan sebagai kampus yang berkelanjutan. [Planning and Budgeting of Green Campus Diponegoro University] Green campus are system of education, research, and community service with environment-friendly and engaging the campus community in environmental activities that can provide positive benefits for the environment, economic, and social. The purpose of this study is: (1) analyze the application of a green campus in Undip based on three main dimensions of sustainable development, namely environmental, economic, and social; (2) Determine the best alternative policy strategies in the implementation of a green campus at Undip for the creation of a sustainable campus; and (3) Make a budget plan Undip campus sustainability. The analytical method used are descriptive qualitative and quantitative analysis. The analytical tool used is Analytical Hierarchy Process (AHP) with Expert Choice version 11. Based on the analysis that the implementation of green campus in Undip have done well, but has not been integrated thoroughly. Policies undertaken by Undip, have generally not been able to provide positive benefits for the environment, economy, and social, so Undip can not be said as a sustainable campus. Copyright (c) 2014 by Fakultas Teknik, Undip. All right reserved.   Diponegoro University 2015-01-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/7196 TEKNIK; Vol 35, No 2 (2014): (Desember 2014) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1940 2012-08-08T06:08:30Z teknik:ART

2460-9919 0852-1697 dc GEOLOGI KAMPUS TEMBALANG Krisna H, Wahju Fahrudin, Fahrudin Geoelectrical, reverse fault Geological conditions at Tembalang areas and surround, Semarang, as a Undulating – Hillockymorphological. That’s can be representation lithological and structural conditions. This surveysused the Geoelectrical sounding and combined with geological surface mapping. There are 15points sounding of Geoelectrical, after interpreted with geological surface mapping, can beconclusion the Breccias lithologic overlay on the upper of Limestones lithologic and finding thereverse fault in the part north of areas survey. Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1940 TEKNIK; Volume 29, Nomor 2, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/46575 2023-01-24T23:37:53Z teknik:ART

"221229 2022 eng " 2460-9919 0852-1697 dc Lestari, Franciska Pramuji Pusat Riset Metalurgi - Badan Riset dan Inovasi Nasional (BRIN) Kawasan PUSPIPTEK Gedung 470, Muncul, Setu, Muncul, Kec. Setu, Kota Tangerang Selatan, Banten 15314 Fisika Material-Departemen Fisika FMIPA UI Gedung F, Fakultas MIPA, Kampus UI Depok, Pondok Cina, Kecamatan Beji, Kota Depok, Jawa Barat 16424 https://orcid.org/0000-0002-4488-5301 Kartika, Ika Juwono, Ariadne Lakshmidevi Anawati, Anawati Komposit berbasis logam Magnesium (Mg) merupakan material maju yang potensial diaplikasikan untuk implan biodegradabel yang bersifat sementara. Mg memiliki sifat biodegradabel, biokompatibel serta memiliki densitas yang mendekati tulang sehingga dapat mengurangi stress shielding antara tulang dan implan. Namun, Mg memiliki laju degradasi yang relatif cepat yang dapat menurunkan sifat mekaniknya di dalam lingkungan fisiologis dan kurangnya sifat bioaktivitas. Di sisi lain, biokeramik yang kerap digunakan sebagai bahan implan tulang dan gigi bersifat bioaktif dan bioinert. Penggabungan Mg dan keramik dapat menjadi sebuah material komposit untuk aplikasi biomedis dengan peningkatan sifat mekanik dan biokompatibilitas serta laju degradasi yang imbang. Dalam kajian ini, dibahas secara komprehensif kemajuan riset material komposit berbasis Mg dengan paduan logam Mg sebagai matriks, berbagai material keramik yang umum digunakan sebagai penguat, fasa-fasa penguatan pada komposit, proses manufaktur serta perlakuan panas pada komposit berbasis magesium. Komposit berbasis Mg menjadi material yang menjanjikan untuk aplikasi biomedis karena kombinasi sifat mekanik yang baik, berat jenis yang rendah, dan kemungkinan untuk mencapai laju korosi yang lebih lambat serta meningkatkan penyembuhan dengan adanya material bioaktif. Diponegoro University 2022-12-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/46575 TEKNIK; Vol. 43, No. 3 (2022): December 2022 ind Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/8716 2015-12-09T05:21:40Z teknik:ART

"151210 2015 eng " 2460-9919 0852-1697 dc CONSUMER PREFERENCE IN TYPE OF HOUSE APPEARANCE OFFERED BY HOUSING DEVELOPER IN SEMARANG Khalifah, Ali Alsharef Khlil Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang, Pandelaki, Edward E. Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang, Rukayah, Siti Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang, preferensi konsumen; penampilan rumah; pengembang rumah; consumer preference; house appearance; developer Persaingan tajam antara bisnis properti perusahaan meningkat seiring dengan bertambahnya populasi dengan meningkatnya kebutuhan rumah. Tujuan dari penelitian ini adalah untuk menganalisis preferensi konsumen tentang penampilan rumah yang ditawarkan oleh pengembang perumahan di Semarang. Populasi dalam penelitian ini pengunjung dari pameran perumahan diselenggarakan di beberapa Mall di Semarang. Teknik analisis yang digunakan adalah persepsi responden tentang preferensi konsumen dalam jenis penampilan rumah dengan analisis deskriptif karena dalam analisis deskriptif akan mencerminkan pendapat sebenarnya dari responden penelitian. Berdasarkan hasil dan analisis, kesimpulan dalam penelitian ini adalah: Jenis rumah yang konsumen paling sukai adalah tipe minimalis dan yang kedua adalah tipe Vernakular. Hal ini karena bentuk Minimalist yang ramping dan menarik di hampir setiap ruang. Tipe Minimalis juga memiliki keunikan yang sangat sederhana dan menarik juga modern. Jenis minimalis sangat populer dan harga yang lebih rendah. Sementara itu, jenis vernakular lebih hampir oleh pengusaha yang berasal dari masyarakat kelas tinggi dan mereka mengatakan jenis vernakular besar dan mewah, juga georgeous. [Title: Consumer Preference in Type of House Appearance Offered by Housing Developer in Semarang] Competition among companies property enhances along with increasing population coupled with the increasing needs of house. The purpose of this study is to analyze the consumer preference in type of house appearance offered by housing developer in Semarang. The method used in this research is qualitative methods because the qualitative methods more better in explaining the phenomena in practices. The analytical method used is depending on respondent perception about consumer preference in type of house appearance with descriptive analysis. The house type that the consumer prefer mostly is minimalist type and the second is Vernacular type. This is because the spare and streamlined is charming in almost any space. Diponegoro University 2015-12-09 12:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/8716 TEKNIK; Vol 36, No 2 (2015): (December 2015) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1727 2012-02-10T06:41:42Z teknik:ART

2460-9919 0852-1697 dc PENGARUH GETARAN DAN KARAKTERISTIK LALU LINTAS TERHADAP BANGUNAN (Studi Kasus Jalan Raya Semarang – Kendal antara Km. 10+000 dan Km. 10+500) Siswanto, Joko Wicaksono, Y.I. vibration, drainasse, traffic, speed Connections between building damage and vibration intensity has been examined by few researcher. Indeedtackling of effort about bigger damage has been examined too. But connections between traffic character andbig vibration in the street edge isn’t much inspect. Some of literature almost study about connections betweenvibration and traffic micro and too specify, such as to look vibration character and it’s relation with vehiclecharacteristic. Generally details like it is less applicative, Theoretically it’s better do by perform a formula.To aim this study is to examine of connections between vibration in the street edge and traffic characteristic athighway. Traffic characteristic which examined covering are traffic volume and average of traffic speed.To support the aim, survey and analysis is needed. Survey material needs are vibration survey, traffic speed,traffic volume and few road characteristic. Survey did at the street edge with three location where everylocation have few different road characteristic, in this case wide of drainage as of attentuation wide. Everylocations inspected by variable inspection distance are 5 m. 15m and 25 m. Speed and traffic volume datarecorded in every location by using manual record, While vibration data recorded at every point of everylocation by using vibration record Vibecheck meter.Result of recording processed and analyzed to obtain average value and it data distribution. To viewconnections between vibration and traffic characteristic, distance and attentuation, to perform correlation andregretion examine. Regretion examine used for mode calibration connections between vibration and trafficcharacteristic, distance and attentuation based on Watt style.Exams result show that 1) There is strong relation between vibration with distance of examine and attentuationwide, where that connections is negative identifying, 2) There is strong relation between vibration and trafficspeed but not with traffic volume and heave vehicle on the traffic, where that connections is positive identifying,3) Watt style calibration examine result gave good enough result if we look R² value of correlation examineresult which reach 0,96.From analysis result we can concluded some cases, 1) cause vibration is effected by traffic speed then decreaseof vibration effect can performed by limitation speed especially at residence area and 2) cause vibration iseffected by distance and attentuation , then decrease of vibration effect can performed by widest distancebetween building and street edge and widest attentuation in this case is drainage Diponegoro University 2012-02-02 14:48:56 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1727 TEKNIK; Volume 32, Nomor 2, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/25837 2020-10-05T04:45:51Z teknik:ART

"200831 2020 eng " 2460-9919 0852-1697 dc Pengaruh Ketebalan Cap dan Tekanan Internal terhadap Tegangan Von Mises Silinder Berdinding Tebal untuk Tabung Motor Roket Wibawa, Lasinta Ari Nendra Magister Teknik Mesin, Fakultas Teknik, Universitas Sebelas Maret Diharjo, Kuncoro Magister Teknik Mesin, Fakultas Teknik, Universitas Sebelas Maret Raharjo, Wijang Wisnu Magister Teknik Mesin, Fakultas Teknik, Universitas Sebelas Maret Jihad, Bagus H. Pusat Teknologi Roket, Lembaga Penerbangan dan Antariksa Nasional metode elemen hingga; bejana tekan; tabung motor roket; analisis tegangan; silinder berdinding tebal Makalah ini meneliti tegangan von Mises yang terjadi dalam silinder berdinding tebal untuk tabung motor roket karena pengaruh ketebalan cap dan tekanan internal. Dimensi panjang silinder adalah 300 mm dan memiliki diameter luar 122 mm dan ketebalan dinding 8 mm. Ketebalan cap divariasikan 10, 15, 20, dan 25 mm dengan tekanan internal 4, 6, 8, 10, dan 12 MPa. Analisis tegangan menggunakan metode elemen hingga dengan perangkat lunak ANSYS untuk pemilihan tabung motor roket. Perbandingan nilai tegangan hoop dan longitudinal antara perhitungan analitik dan simulasi digunakan untuk proses validasi. Hasil simulasi menunjukkan bahwa ketika ketebalan cap meningkat, tegangan Von Mises berkurang. Aluminium 6061 dan CFRP memiliki faktor keamanan lebih tinggi dari 1,25 untuk semua ketebalan cap dan variasi tekanan internal. GFRP memiliki faktor keamanan lebih tinggi dari 1,25 untuk semua variasi tekanan internal ketika ketebalan cap 20 dan 25 mm. Diponegoro University 2020-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/25837 TEKNIK; Vol 41, No. 2 (2020): August 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2117 2012-02-23T04:29:08Z teknik:ART

2460-9919 0852-1697 dc OPTIMASI PENGUMPULAN DAN PENGANGKUTAN SAMPAH KOTA DENGAN MENGGUNAKAN MODEL POWERSIM Budihardjo, M. Arief Zaman, Badrus Garbage, Gathering and Transportation, Powersim Gathering and transportation of garbage represent problems in Town Semarang with 1.431.105 population. Neededan effort of effective garbage management breakthrough in order to improving efficiency and optimalisationgathering and transportation of garbage by using Powersim dynamic model. Powersim is windows base software tocreate the model of dynamic system with a simulator desain. Simulation of gathering and transportation garbagemodel in Town Semarang of early compilation concept. Compilation concept conducted by determining elementwhich playing a part in gathering and transportation process of garbage which interact and have depending.Concept formed to be formulated by as model which is the in form of the breakdown of, picture or formula. Here inafter simulation conducted with the model which have been made by including data to know behavior process of thegarbage gathering and transportation. Data input for the gathering to cover the garbage volume, appliancetransport the garbage and to the transportation of its data input cover the garbage volume in place Dismissal ofWhereas and appliance garbage transport. Result of research shown existing condition of garbage gathering andtransportation in Town Semarang not yet optimal, seen by garbage amount which not yet been transported byduring gathering process. After optimation proven by that any garbage transported at process of gathering andtransportation and also do not rest of garbage which piled up. For repair of gathering and transportationrecommended by gathering process (1) used a garbage pedicab amount to 1300 with 0,82 m2 capacity, 2 timesritation and operate everyday and ( 2) 15 dump truck, with 6 m3 capacity, 1 times rotation and operate everyday. Itstransportation repair used by arm roll truck as much 60 by 6 times ritation and have 6 m 3 capacities operatingeveryday Diponegoro University 2012-02-10 11:25:01 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2117 TEKNIK; Volume 28, Nomor 2, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/57930 2024-01-16T21:44:16Z teknik:ART

"231213 2023 eng " 2460-9919 0852-1697 dc Putri, Zulfara Disnatya Anggita Wahyuddin, Yasser https://orcid.org/0000-0001-5222-8435 Amarrohman, Fauzi Janu Nilai lahan memiliki perubahan dinamis. Peningkatan nilai lahan menjadi salah satu sumber pendapatan asli daerah melalui penyesuaian Nilai Jual Objek Pajak (NJOP). Penyesuaian NJOP menggunakan pendekatan harga pasar dan potensial untuk implementasi kebijakan Land Value Capture. Penelitian ini bertujuan untuk mengetahui zona nilai tanah tahun 2023, pengaruh faktor aksesibilitas, pusat perdagangan, fasilitas kesehatan, fasilitas pendidikan dan sarana umum terhadap nilai tanah serta potensi implementasi kebijakan Land Value Capture. Studi kasus dilakukan untuk tanah di sekitar koridor Jalan Durian Raya, Banyumanik, Semarang. Metode yang digunakan yaitu Spatial Autoregressive Model (SAR) dan Assessment Sales Ratio (ASR). Hasil penelitian menunjukan bahwa zona dengan Nilai Indeks Rata-Rata (NIR) tertinggi yaitu zona 2409, dengan nilai sebesar Rp. 23.364.000,- untuk harga pasar dan zona 181 sebesar Rp. 15.105.000,- untuk NJOP. NIR terendah yaitu zona 860 sebesar Rp. 2.448.000,-  untuk harga pasar dan Rp. 792.000,- untuk NJOP. Hasil penghitungan SAR menunjukan pengaruh faktor aksesibilitas merupakan faktor paling signifikan, dengan nilai sebesar 0,0007 pada harga pasar dan 0,00188 pada NJOP. Dari penghitungan ASR di Jalan Durian Raya didapatkan hasil sebesar 35% pada zona 28 dan 73% pada zona 323. Nilai ini menunjukkan bahwa pada kedua zona tersebut masih perlu dilakukan penyesuaian NJOP. Diponegoro University 2023-12-08 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/57930 TEKNIK; Vol. 44, No. 3 (2023): December 2023 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/57930/185896 Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/13310 2020-04-17T09:32:49Z teknik:EI

"161231 2016 eng " 2460-9919 0852-1697 dc Front-matter Istadi, Istadi teknik; jurnal teknik Front-matter Diponegoro University 2016-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/13310 TEKNIK; Vol 37, No 2 (2016): (Desember 2016) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1764 2012-02-10T07:57:25Z teknik:ART

2460-9919 0852-1697 dc PENGUKURAN MOTIVASI KERJA PANITIA PENGADAAN BARANG ATAU JASA PEMERINTAH (Studi Kasus Dinas Pendidikan Provinsi Jawa Tengah) Pujotomo, Darminto Fanani R, Zainal Dwi Utomo, Prasetyo Procurement, motivation, Job Diagnostic Survey Improvment Job Motivation need to organization for better job. Aims this reserach is redesign job ofprocurement comitte in Dinas Pendidikan Propinsi Jawa Tengah for improving job motivation. This reserachbased on job characteristic, such various skills, job identification, job significant, otonomy, and feedback. Themethod Job Doiagnostic Survey (JDS) from Hackman and Oldham, used for queaionaire design in comitteprocurerment responden. Diponegoro University 2012-02-02 14:46:02 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1764 TEKNIK; Volume 31, Nomor 2, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/29035 2021-06-03T02:06:48Z teknik:ART

"210507 2021 eng " 2460-9919 0852-1697 dc Geoelectric Method Application of Dipole-Dipole Configuration for Identification of Landslide Prone Areas in Poka Village, Ambon Amukti, Rian Pusat Penelitian Laut Dalam, Lembaga Ilmu Pengetahuan Indonesia http://orcid.org/0000-0002-7931-7419 Damayanti, Cahya Pusat Penelitian Laut Dalam, Lembaga Ilmu Pengetahuan Indonesia Yamko, Abdul Kadir Pusat Penelitian Laut Dalam, Lembaga Ilmu Pengetahuan Indonesia Lekalette, Johanis Dominggus Pusat Penelitian Laut Dalam, Lembaga Ilmu Pengetahuan Indonesia landslides; geoelectric; dipole-dipole; resistivity; sliding plane Bencana longsor merupakan salah satu jenis bencana yang sering terjadi di Indonesia yang menyebabkan banyak korban jiwa dan kehilangan harta benda. Kota Ambon merupakan daerah potensi longsor yang tinggi. Hal ini karena Kota Ambon merupakan daerah dengan kemiringan lereng yang curam, dan curah hujan yang tinggi sehingga dibutuhkan kajian untuk menanggulangi hal tersebut sebagai upaya mitigasi bencana. Penelitian ini bertujuan untuk mengetahui bidang gelincir longsoran dan arah longsoran sebagai dasar untuk identifikasi daerah rawan longsor dengan menggunakan metode geolistrik konfigurasi dipole-dipole. Penelitian ini telah dilakukan di Desa Poka, Kota Ambon, Propinsi Maluku. Pengukuran geolistrik menggunakan alat AGI Ministing dengan pengambilan data sebanyak 5 lintasan. Berdasarkan hasil analisis didapatkan bahwa lapisan tanah yang didominasi dengan lempung dan gamping. Hasil rekonstruksi menunjukkan bahwa topografi daerah tersebut merupakan lereng dengan kemiringan 45o-80o, dan bidang gelincir terdapat setiap lintasan dengan kontras resistivitas ±25-60 Ωm  pada kedalaman 5-15 meter, sedangkan arah longsoran mengarah pada arah tenggara. Diponegoro University 2021-05-03 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/29035 TEKNIK; Vol. 42, No. 1 (2021): May 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4810 2013-05-06T01:41:05Z teknik:ART

2460-9919 0852-1697 dc PONDASI TIANG PANCANG DAKTAIL Dwi Atmanto, Indrastono Array The driven ductile iron pile is a simple and economical driven foundation system made from ductile iron pipes. The pipe material is centrifugally-cast ductile iron, which has excellent ductility, strength, and corrosion resistance properties. The material behavior and the manufacturing of the pipes in the plant are described. Questions concerning corrosion are treated. The internal and external bearing capacity is discussed as well as the production of the piles on construction sites. Finally the range of application in practice is presented. Diponegoro University 2012-08-08 13:06:31 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/4810 TEKNIK; Volume 34, Nomor 1, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/60275 2025-04-17T01:00:52Z teknik:ART

"241230 2024 eng " 2460-9919 0852-1697 dc Santi, Narulita Departemen Teknik Geologi Undip https://orcid.org/0009-0000-2319-9727 Hadiyanto, Hadiyanto Yudariansyah, Hadi Keselamatan Kesehatan Kerja Lingkungan (K3L) merupakan komponen fundamental dalam berbagai sektor, termasuk pendidikan tinggi dan penelitian geologi. Aktivitas seperti pengambilan sampel dan penelitian lapangan kerap menghadirkan berbagai risiko, seperti kecelakaan kerja, paparan bahan berbahaya, serta kondisi lingkungan yang tidak dapat diprediksi. Oleh karena itu, pemahaman dan penerapan prosedur K3L menjadi esensial bagi dosen dan mahasiswa. Sebagai figur teladan, dosen memiliki tanggung jawab moral dan profesional untuk menjalankan etika profesi. Penelitian ini bertujuan untuk mengevaluasi implementasi K3L dan etika profesi dosen dalam kegiatan pengambilan data geologi dan sampel air tanah. Metode HIRADC dan JSA digunakan karena kerangka kerja yang sistematis untuk mengidentifikasi bahaya, menilai risiko, dan pengembangan langkah-langkah pengendalian. Hasil penelitian menunjukkan bahwa pelaksanaan K3L telah dilakukan dengan baik dimana risiko kecelakaan kerja bernilai minimal. Hal ini dicapai melalui proses identifikasi bahaya, evaluasi risiko, serta penerapan pengendalian yang efektif. Etika profesi dosen menjadi landasan seluruh tahapan penelitian, mulai dari perencanaan hingga pelaksanaan di lapangan. Dalam perannya, dosen tidak hanya sebagai narasumber yang memberikan pengarahan sebelum kegiatan lapangan, tetapi juga mengedepankan prinsip etika lingkungan, etika pengambilan keputusan, serta etika integritas dan transparansi. Temuan ini menekankan pentingnya sinergi antara penerapan K3L dan etika profesi untuk menjamin keselamatan, efektivitas, dan keberlanjutan kegiatan penelitian geologi. Diponegoro University 2024-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/60275 TEKNIK; Vol 45, No 3 (2024): December 2024 ind Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/15192 2020-04-17T09:35:53Z teknik:ART

"180731 2018 eng " 2460-9919 0852-1697 dc Analisis Jaringan Perpipaan Distribusi Air Bersih Menggunakan EPANET 2.0 (Studi Kasus di Kelurahan Harapan Baru, Kota Samarinda) Nugroho, Searphin Program Studi Teknik Lingkungan, Fakultas Teknik, Universitas Mulawarman Meicahayanti, Ika Program Studi Teknik Lingkungan, Fakultas Teknik, Universitas Mulawarman Nurdiana, Juli Program Studi Teknik Lingkungan, Fakultas Teknik, Universitas Mulawarman EPANET 2.0; Jaringan Perpipaan; Kebocoran Jaringan Perpipaan; Kelurahan Harapan Baru; PDAM Samarinda Distribusi air di Kota Samarinda masih belum optimal dikarenakan factor tekanan air di dalam pipa yang rendah pada waktu tertentu dan kehilangan air fisik karena kebocoran. Artikel ini memuat analisis jaringan perpipaan distribusi air bersih di Kelurahan Harapan Baru, Kota Samarinda menggunakan perangkat lunak EPANET 2.0. Hasil simulasi dibandingkan dengan hasil pengukuran tekanan air di lapangan pada kran pelanggan menggunakan manometer. Dari hasil penelitian, diketahui terdapat sebanyak 7 junction yang nilai tekanan airnya di bawah batas minimum kriteria pipa distribusi dari Peraturan Menteri Pekerjaan Umum No.18/PRT/M/2007 sebesar 0,5 atm, serta sebanyak 11 pipa yang nilai kecepatan aliran airnya di bawah batas minimum kriteria yang sama sebesar 0,3 m/s. Rekomendasi perbaikan jaringan perpipaan distribusi air bersih berupa tekanan minimum sebesar 0,5 bar pada pelanggan dan kontinuitas, yakni perubahan pengaturan tekanan pada valve existing, dan penambahan pompa booster pada beberapa titik. Terdapat perbedaan nilai tekanan air yang cukup signifikan antara hasil simulasi model EPANET dengan pengukuran langsung pada kran pelanggan Diponegoro University 2018-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/15192 TEKNIK; Vol 39, No 1 (2018): (July 2018) eng Copyright (c) 2018 Teknik

oai:ojs.ejournal.undip.ac.id:article/1886 2012-02-24T10:42:49Z teknik:ART

2460-9919 0852-1697 dc STUDY ON SURGE ARRESTER PERFORMANCE DUE TO LIGHTNING STROKE IN 20 KV DISTRIBUTION LINES Warsito, Agung Syakur, Abdul N.S., Liliyana Array Electric energy has been transmiting from power station to end user with transmission and distribution lines.Lightning strokes are problems that occure in transmission and distribution lines and make them fault when theelectric energy were transmited. Surge Diverter or Lightning Arrester has been installing to reduce these faults.In this paper the simulation of lightning stroke and lightning arrester performance on distribution lines 20 kVwere done using EMTP (Electromagnetic Transient Program). Some parameters such us impuls voltage andincreasing voltage on distribution line was inverstigated. As case study in this simulation, Mojosongo 1 mainfeeder 20 kV three phase lines were used.The simulation results show that the lightning stroke 20 kA in By1-61-61E-84-9I on S phase at 0,1 ms, makevoltage on S phase was increased about 1,3054 MV. For R phase and T phase will increase of induced voltagewere 0.79539 MV and 0.80484 MV. We also show the performance of MOV Arrester (Metal Oxide Varistor) inovercoming lightning stroke trouble, where arrester can decrease voltage up to 15.198 kV on S phase, while atR phase and T phase arrester can decrease voltage up to 11.375 kV and 13.616 kV. Diponegoro University 2012-02-15 10:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1886 TEKNIK; Volume 30, Nomor 3, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/43388 2021-12-26T19:56:39Z teknik:EI

"211217 2021 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi front-matter TEKNIK Volume 42 Nomor 3 Tahun 2021, yaitu meliputi halaman sampul, fokus dan ruang lingkup TEKNIK, informasi indeksasi, susunan tim penyunting dan mitra bebestari, kata pengantar editor dan daftar isi.  Diponegoro University 2021-12-17 04:29:52 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/43388 TEKNIK; Vol 42, No. 3 (2021): December 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/6984 2014-12-24T02:20:43Z teknik:ART

"131202 2013 eng " 2460-9919 0852-1697 dc OPTIMASI POSISI PILOT MENGGUNAKAN ALGORITMA GENETIKA UNTUK MENINGKATKAN KINERJA Wi-Fi 802.11n Syafei, Wahyul Amien Staf Pengajar Jurusan Teknik Elektro Fakultas Teknik Universitas Diponegoro Nasution, Yunda Kumala Staf Pengajar Jurusan Teknik Elektro Fakultas Teknik Universitas Diponegoro Sukiswo, Sukiswo Staf Pengajar Jurusan Teknik Elektro Fakultas Teknik Universitas Diponegoro Array Wi-Fi is wireless communication technology that  used widely not only for accessing the internet but also communicating data, image, voice and video. The newest wi-fi technology is 802.11n as an extention of 802.11a/b/g. By  combining OFDM and MIMO techniques it can provide throughput up to 600Mbps. One of important factors to achieve such high throughput is the pilot position in training sequence. Wi-fi802.11n allocates it’s pilots orthogonally. This research optimizes the pilot location using Genetic Algorithm Differential Evolution. Optimum pilot position improves the accuracy of synchronization which leads to enhance the performance. The invented optimum pilot position set then be implemented into wi-fi 802.11n simulator to be analyzed the performance enhancement which represented in grafic BER vs SNR curve.Run test under channel model B and D proof that the invented optimum pilot position gives performance enhancement of 0,5 dB and maintain it’s stability compared towi-fi 802.11n system with  set ortogonal pilot position. Diponegoro University 2013-12-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/6984 TEKNIK; Volume 34, Nomor 3, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67453 2025-11-17T01:02:24Z teknik:ART

"251117 2025 eng " 2460-9919 0852-1697 dc Optimal Placement of Renewable Distributed Generation for Power Losses and Emissions Reduction Using the Multi Verse Optimization Algorithm in Distribution System Firdaus, Firdaus Department of Electrical Engineering Education, Faculty of Engineering, Universitas Negeri Makassar. Jl. A.P. Pettarani, Makassar, Indonesia 90222 DG; RES; optimal placement; MVO algorithm; emissions Distributed Generation (DG) from Renewable Energy Sources (RES) is widely applied in distribution systems or small-scale electric power networks. DG RES utilizes renewable energy sources such as PV and wind turbines. However, the intermittent and uncertain nature of renewable energy sources requires a mechanism to select and utilize them optimally. The aim of this research is to develop an optimization model for the use of renewable energy sources by determining the placement and size of optimal DG units sourced from renewable energy. Optimal placement and size decisions are obtained by considering emissions or pollution, power losses and voltage profiles in the electric power system. This research uses the Multi Verse Optimization (MVO) method, which is a development of the multiverse theory and the big bang theory. The simulation in this research was carried out on the IEEE 33 bus distribution system. Simulation results using Matlab software show that the optimal placement and size of distributed generators from renewable energy sources can significantly improve the voltage profile and reduce electrical power losses. The optimal placement and sizing result for 1 DG injection is on bus 6, while when 3 DG injection, the optimal placement is on Bus 13, 24 and 30. This placement location is the same as the research results with other methods or algorithms. Optimizing the installation of three DG renewable energy sources using MVO by considering environmental factors was able to reduce emissions by 71.62 percent. Thus, there is a reduction in costs as environmental compensation of 71.60 percent in the IEEE 33 Bus system.      Diponegoro University 2025-11-17 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67453 TEKNIK; Vol 46, No 3 (2025): Juli 2025 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/67453/220707 Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/23656 2020-04-17T09:38:25Z teknik:ART

"191111 2019 eng " 2460-9919 0852-1697 dc Erfando, Tomi Universitas Islam Riau Khalid, Idham Safitri, Retno Demulsifier digunakan untuk mengatasi masalah emulsi minyak mentah pada saat produksi. Artikel ini memuat uji laboratorium demulsifier lokal dari minyak kelapa dan lemon dibandingkan demulsifier komersil. Parameter yang diperiksa adalah nilai pemisahan emulsi, pengaruh parameter pengujian terhadap pemisahan air secara statistik, dan water quality hasil demulsifikasi dengan uji TDS (Total Dissolved Solid) dan pH. Penelitian ini menggunakan metode saponifikasi dalam pembuatan demulsifier dan pengujian demulsifier menggunakan metode bottle test. Variasi temperatur adalah 400C, 500, 600C, 700C, dan 800C dengan konsentrasi 1ml, 3ml, dan 5 ml. Hasil penelitian menunjukkan bahwa demulsifier lokal mampu memecah emulsi di seluruh temperatur pengujian. Pemisahan tertinggi terjadi pada temperatur 600C,700C, dan 800C  dengan konsentrasi  optimal 3ml dan 5 ml dan hasil pemisahan sebesar 32 ml dan 33 ml. Di sisi lain demulsifier komersil pada temperatur 400C dan konsentrasi 5ml gagal memecah emulsi. Pengaruh temperatur dan konsentrasi terhadap pemisahan air secara berurut sebesar 42,5 %  dan 2,7%. Water quality yang baik hasil demulsifikasi terjadi pada pengujian sampel demulsifier lokal 2 dengan TDS 244 ppm dan pH 6,99. Diponegoro University 2019-11-11 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/23656 TEKNIK; Vol 40, No. 2 (2019): Agustus 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/45876 2022-09-19T00:37:33Z teknik:ART

"220829 2022 eng " 2460-9919 0852-1697 dc Hatmoko, Jati Utomo Dwi Department of Civil Engineering, Diponegoro University https://goo.gl/60gS79 https://orcid.org/0000-0002-0795-4531 Hidayat, Arif Zachari, Moammar Merukh, Satria Sentik Herman Literatur menunjukkan bahwa keterlambatan proyek masih menjadi masalah yang umum dijumpai di berbagai negara. Pada umumnya faktor-faktor penyebab keterlambatan proyek banyak dipandang dari sisi tanggung jawab kontraktor. Sementara itu masih jarang dijumpai penelitian terdahulu yang meneliti faktor penyebab keterlambatan proyek dari sisi owner . Penelitian ini bermaksud untuk menginvestigasi pengaruh keterlambatan pembayaran proyek kontruksi dari owner kepada kontraktor. Studi pendahuluan dilakukan melalui wawancara terbatas dan dilanjutkan pengumpulan data melalui kuesioner kepada 80 responden kontraktor, menggunakan teknik analisis campuran kualitatif dan kuantitatif. Hasil penelitian menunjukkan tiga pengaruh terbesar adalah terlambatnya pembayaran kontraktor kepada subkontraktor dan supplier, gangguan cashflow kontraktor, dan kesulitan mendapatkan material. Penyebab utama keterlambatan pembayaran owner antara lain adalah birokrasi yang kompleks dalam mengajukan pembayaran, ketidaklengkapan persyaratan dokumen, dan kualitas pekerjaan yang buruk. Solusi yang ditempuh kontraktor antara lain, melakukan penagihan kepada owner secara terus menerus, menuntut owner membayar bunga atas keterlambatan pembayaran, dan menunda kewajiban pembayaran kepada supplier dan subkontraktor. Hasil penelitian ini menunjukkan bahwa keterlambatan pembayaran dari owner masih menjadi permasalahan serius di industri konstruksi di Indonesia. Temuan penelitian ini bisa menjadi masukan bagi pemangku kepentingan di industri konstruksi untuk memahami permasalahan keterlambatan pembayaran owner dan dampaknya pada proyek, serta menformulasikan strategi preventif yang tepat. Diponegoro University 2022-07-04 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/45876 TEKNIK; Vol. 43, No. 2 (2022): August 2022 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/45876/143678 Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/7701 2015-10-17T03:39:04Z teknik:ART

"150704 2015 eng " 2460-9919 0852-1697 dc PERSEPSI PENGEMBANGAN PETA RAWAN GEMPA KOTA SEMARANG MELALUI PENELITIAN HAZARD GEMPA DETERMINISTIK Partono, Windu Jurusan Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang 50275 Irsyam, Masyhur Jurusan Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang 50275 Retno Wardani, Sri Prabandiyani Jurusan Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang 50275 Maarif, Syamsul Jurusan Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang 50275 analisa hazard gempa deterministik; sesar aktif; spektra percepatan; faktor amplifikasi Pengembangan peta resiko gempa berdasarkan analisa hazard gempa deterministik (DSHA) merupakan salah satu tahapan yang sangat penting untuk mitigasi kegempaan Kota Semarang. Penelitian peta resiko gempa mencakup perhitungan hazard gempa, analisa kondisi tanah lokal (SSA) dan analisa tingkat resiko kegempaan. Analisa hazard gempa diimplementasikan dengan pendekatan deterministic akibat gempa untuk sumber gempa sesar aktif disekitar Kota Semarang. Parameter geoteknik diperoleh dari hasil pengamatan atau pengujian geoteknik. Hasil dari penelitian ini mencakup pengembangan peta spektra percepatan gerakan tanah di permukaan dan faktor amplifikasi percepatan tanah yang sangat diperlukan pada pengembangan peta rawan gempa Kota Semarang. [Perception Development of Seismic Risk Map Semarang City Through Deterministic Hazard Analysis Research] Development of seismic risk map based on Deterministic Hazard Analysis (DSHA) is an important step for seismic disaster mitigation for Semarang City. The study includes estimation of seismic hazard (DSHA), site specific response analysis (SSA) and risk assessment. Seismic hazard is performed based on deterministic approach considering shallow crustal fault sources influencing Semarang City. Geotechnical parameters are interpreted from previous geotechnical measurements. The result of the hazard analysis includes the distribution of site response spectral acceleration and amplification ratios are performed corresponding to seismic risk assessment for Semarang City.   Diponegoro University 2015-07-04 16:42:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/7701 TEKNIK; Vol 36, No 1 (2015): (Juli 2015) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1690 2012-02-10T07:42:07Z teknik:ART

2460-9919 0852-1697 dc PENCEMARAN LOGAM BERAT MERKURI (Hg) PADA AIRTANAH Triadi Putranto, Thomas Groundwater, heavy metals, mercury, and effects of mercury poisoning. The earth consists largely of water because the land area is smaller than the ocean. Human beings on this earthcan not escape the need for water. Water is the main requirement for the process of life on the earth.Relatively clean water that is coveted by men, whether for purposes of daily life, for industrial purposes, for thecleanliness of city sanitation, as well as for agricultural purposes and so forth. Heavy metal pollution is a veryserious issue to be handled, because of adverse environmental and ecosystem in general. Heavy metallic elementis the element which has a density of more than 5 gr/cm3. Hg has a density of 13.55 gr/cm3. Disaster is anoutbreak of Minamata mercury poisoning in people who eat fish contaminated by mercury in Minamata Japan,and this event is known as Minamata Disease. Efforts to tackle the heavy metal pollution can actually be doneusing a chemical process or by microorganism such as microbes and bacteria. Diponegoro University 2012-02-02 14:47:08 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1690 TEKNIK; Volume 32, Nomor 1, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/25406 2020-07-10T16:19:13Z teknik:ART

"200531 2020 eng " 2460-9919 0852-1697 dc Sitorus, Tulus Burhanuddin http://www.yahoo.com Abda, Syahrul Kolektor merupakan salah satu komponen utama dari mesin pendingin adsorpsi tenaga surya. Dapat dikatakan bahwa kolektor merupakan motor penggerak dari siklus yang terjadi pada mesin pendingin adsorpsi. Pada penelitian ini digunakan kolektor tipe plat datar dengan luas penampang 0,5 m2 dan diisi dengan menggunakan pasangan adsorpsi karbon aktif serbuk-metanol. Proses pengujian dilakukan di lokasi yang terkena paparan radiasi matahari selama beberapa hari. Alat ukur cuaca digunakan untuk mengetahui parameter yang diukur seperti intensitas radiasi, temperatur dan kelembaban udara lingkungan. Sedangkan alat ukur termokopel yang terhubung dengan alat akuisisi data digunakan untuk merekam perubahan temperatur pada komponen kolektor dan mesin pendingin adsorpsi. Hasil eksperimental menunjukkan bahwa efisiensi kolektor yang diperoleh memiliki nilai maksimum sebesar 55,43%. Diperoleh juga pengaruh kondisi cuaca terhadap kinerja kolektor berdasarkan analisa statistik sebesar 72% Diponegoro University 2020-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/25406 TEKNIK; Vol 41, No. 1 (2020): May 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2075 2012-02-22T03:19:03Z teknik:ART

2460-9919 0852-1697 dc KAJIAN PELEPAH KELAPA SEBAGAI SERAT KOMPOSIT (STUDY OF COCONUT BRANCH AS COMPOSITE FIBER) Darmanto, Seno Sediono, Windu Setyoko, Bambang Murni, Murni coconut branch, composite, binder, fiber, cellulose. Research is done to analyze coconut branch fiber as car body composite. Analyzing is based onmaterial, composition, and strength of material. Research was done in laboratory. Coconut branchfiber is obtained by natural drying process and cutting to become fiber with ±0,5 mm of length.Reinforcement and binder is determined polyester resin. Coir (coconut fiber) have 1.15 kg/m3 ofdensity, 1.15 MPa of strength dan modulus elastisitas 4 – 6 GPa. And based on specimen and studyof literatures can show that increase of cellulose of natural fiber will increase modulus of elasticity.The Increasing of modulus of elasticity will be maximal with cellulose more than 60%. Color ofspecimen is transparent yellow. Diponegoro University 2012-02-10 11:26:10 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2075 TEKNIK; Volume 28, Nomor 1, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/55801 2023-10-12T21:21:38Z teknik:ART

"230830 2023 eng " 2460-9919 0852-1697 dc Analysis Of Regional Public Transport Supporting Infrastructure Based On Local Characteristics On The Effectiveness And Efficiency Of Public Transport (Case Study: Trans Jateng Corridor 1 Semarang-Bawen) Ismiyati, Ismiyati Department of Civil Engineering, Faculty of Engineering, Diponegoro University Azka, Nuriyana Wahida Department of Civil Engineering, Faculty of Engineering, Diponegoro University Riyanto, Bambang Department of Civil Engineering, Faculty of Engineering, Diponegoro University Basuki, Kami Hari Department of Civil Engineering, Faculty of Engineering, Diponegoro University regional public transportation; effectiveness; efficiency; integrated supporting infrastructure Kemacetan merupakan permasalahan yang melanda banyak kota besar di Indonesia, termasuk Kota Semarang dan Kabupaten Semarang. Kemacetan merupakan akibat dari meningkatnya populasi penduduk Kota Semarang dan Kabupaten Semarang. Kemacetan meningkat sejalan dengan berkembangnya aktivitas bisnis, perumahan, perkantoran, serta pertumbuhan penggunaan kendaraan bermotor. Beragam cara diupayanan untuk mengatasi ini, termasuk diantaranya adalah transportasi massal berkelanjutan. Transportasi massal berkelanjutan memiliki potensi besar dalam mengurangi kemacetan di kota-kota besar. Contoh penerapannya adalah Trans Jateng. Ia menjadi transportasi massal di Provinsi Jawa Tengah, termasuk untuk rute Semarang – Bawen. Di rute ini sendiri seringkali terjadi kemacetan, karena tingginya tingkat penggunaan kendaraan pribadi. Dengan melakukan perbaikan pelayanan dan fasilitas infrastruktur transportasi massal diharapkan akan menarik minat masyarakat untuk berpindah menggunakan transportasi massal. Studi ini bertujuan mengidentifikasi infrastruktur pendukung Trans Jateng Koridor 1 serta menganalisis pengaruhnya terhadap efektifitas dan efisiensi angkutan umum regional. Metode yang digunakan dalam studi ini adalah simulasi computer apabila infrastruktur dikembangkan menjadi ramah lingkungan berbasis karakteristik daerah dan pengguna kendaraan pribadi beralih ke angkutan umum regional Trans Jateng Koridor 1. Hasil simulasi menunjukkan bahwa dengan perpindahan pengguna kendaraan pribadi sebesar 50%, 60%, dan 70% akan berpengaruh terhadap efektivitas dan efisiensi pelayanan angkutan umum regional Trans Jateng sebesar 44% dan menurunnya tingkat kemacetan dengan indikasi rata-rata Derajat Kejenuhan (DS) sebesar 0,37. Kesimpulan yang ditarik adalah bahwa dengan infrastruktur terintegrasi berbasis karakteristik daerah akan meningkatkan efektifitas dan efisiensi pelayanan angkutan umum regional Trans Jateng. Rekomendasi dari studi ini adalah perlu dilakukan peningkatan efektifitas dan efisiensi pelayanan angkutan umum regional dengan pengembangan infrastruktur terintegrasi berbasis karakteristik daerah. Diponegoro University 2023-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/55801 TEKNIK; Vol. 44, No. 2 (2023): August 2023 ind Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/23004 2020-04-17T09:39:24Z teknik:ART

"190531 2019 eng " 2460-9919 0852-1697 dc Digital Terrain Model (DTM) Generation From Light Detection and Ranging (LiDAR) Data By Using Simple Morphological Safi'i, Ayu Nur Hartanto, Prayudha LiDAR; DTM; SMRF Pembuatan Peta RBI skala 1:5.000 membutuhkan waktu yang lama, khususnya untuk pembuatan layer kontur. Layer kontur bisa didapatkan dari data hasil ekstraksi foto udara dan data Light Detection and Ranging (LIDAR). Sekarang ini, teknologi LiDAR lebih diandalkan untuk membuat Data Surface Model (DSM). Dari DSM dilakukan proses ekstrasi data untuk mendapatkan data Digital Terrain Model (DTM) atau Digital Elevation Model (DEM) yang prosesnya lebih cepat dan membutuhkan biaya yang relatif rendah. Metode filtering yang digunakan adalah metode Simple Morphological Filtering (SMRF) dengan memasukkan nilai parameter cell size, slope, windows, elevation threshold dan scalling factor. Hasil Cohen’s kappa rata-rata menunjukkan indikator DTM dalam kondisi baik, yang artinya dengan menggunakan metode SMRF, nilai kappa berada diantara 0,4-0,7. Smoothing filter dilakukan untuk menghilangkan sel kosong/ sel tanpa data. DTM yang dihasilkan dibandingkan dengan data validasi lapangan. Root Mean Square Error (RMSE) yang diperoleh berkisar antara 0,621-0,930 dan nilai Linear Error 90% (LE90) yang diperoleh berkisar antara 1,025-1,605. Hasil penelitian ini menunjukkan nilai RMSE dan LE90 tersebut memenuhi ketelitian vertikal peta skala 1: 5.000 dan masuk dalam kelas 2 dan 3 sesuai Peraturan BIG No.6 Tahun 2018 mengenai perubahan atas Perka BIG No.15 Tahun 2014 tentang Pedoman Teknis Ketelitian Peta Dasar Diponegoro University 2019-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/23004 TEKNIK; Vol 40, No. 1 (2019): Mei 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1751 2012-02-15T04:03:20Z teknik:ART

2460-9919 0852-1697 dc PENGEMBANGAN DESAIN STARTING BLOCK KOLAM RENANG DENGAN MENGGUNAKAN THEORY OF INVENTIVE PROBLEM SOLVING (TRIZ) Nurkertamanda, Denny Ahman, Asen Starting block, TRIZ, Ideal Result. Swimmingpool starting block is one of swimming equiptment that must be used in swimming sport competition.It used not only by senior athlete but also the beginner. In addition, it used not only in one swimmingpool butalso another pool which has different height of watersurface and swimmingpoll wallside.Now, the condition of starting block only fit with some of athlete. The other athlete had difficulties when use it.Because of that, design improvement need to be done for starting block to be adaptable for all athlete in anyage and adaptable for the condition of watersurface.Adaptability fitur improvement for starting block makes fitur stabilition of product composition getting worse,and those things is unwanted. So that Theory of Inventive Problem Solving (TRIZ) method is needed to solvethe problem technical contradiction so the ideal final output can be reached.Adaptable starting block design can be reached after solve the technical contradiction happened when solvingthe problems used TRIZ. Reducing the parameters which had disadvantages for the ideal final product suchas: weight of the moving object, quantity of the material used, dangerous factor of the object, and dangerousfactors from environtment. Diponegoro University 2012-02-02 14:41:15 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1751 TEKNIK; Volume 31, Nomor 1, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/36152 2021-06-03T02:07:09Z teknik:ART

"210503 2021 eng " 2460-9919 0852-1697 dc Analysis of Leakage Current and Insulator Resistivity for Quality Assurance of Medium Voltage Network Polymer Insulators Alumina - SiO2 in Tropical Climate Simulator Room Utami, Agnes Manik Sari Department of Electrical Engineering, Universitas Diponegoro Syakur, Abdul Department of Electrical Engineering, Universitas Diponegoro Hermawan, Hermawan Department of Electrical Engineering, Universitas Diponegoro resin epoxy; leakage currents; insulators resistivity; climate chamber simulator The tropical climate of Indonesia, which has moderately high rainfall, has an impact on the output of outdoor insulators. The presence of chemical particles, pollen, and salt in the air will bind to the insulating material's outer surface and settle, resulting in crystallization that allows the insulating material's surface roughness to increase. One of the insulators that are being produced is an insulator made of epoxy resin. The injection of fillers is used to further improve the durability of the outdoor epoxy resin insulators installed in tropical climatic conditions. Epoxy resin from bisphenol A-epichlorohydrin and polyaminoamide combined with silane, alumina, and SiO2 is used as research materials. The parameters examined were leakage current and resistance to insulation. The use of silane as a hardener will also improve the resistivity on the surface of the insulator, which makes it more difficult to flow or reduces the leakage current. Alumina is well-known for being a solid heat and voltage insulator. The addition of SiO2 to the epoxy resin insulating material increases the insulator's mechanical strength in the form of tensile and compressive strength. With fluctuations in temperature and humidity, the artificial tropical environment is replicated in a test chamber. The value of the leakage current increases with an increase in temperature and humidity. The correlation between air temperature and humidity and insulation resistance is inversely proportional, the higher the temperature applied to the insulator, the lower the insulator resistivity. The same refers to the relationship between air humidity and resistance to insulation. The higher the humidity applied to the insulator, the lower the insulator resistivity. At a test voltage of 11 kV, a humidity of 60%, and a temperature variation of 25oC, the leakage current of epoxy resin insulators is up to 9.2 uA lower than in a factory-made SiR insulator. The leakage current and insulator resistivity's number is already in the good and protected range such that the insulator can be used and reproduce. Diponegoro University 2021-05-03 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/36152 TEKNIK; Vol. 42, No. 1 (2021): May 2021 eng https://ejournal.undip.ac.id/index.php/teknik/article/download/36152/108390 https://ejournal.undip.ac.id/index.php/teknik/article/download/36152/114298 Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4381 2013-01-22T02:50:02Z teknik:ART

"121015 2012 eng " 2460-9919 0852-1697 dc POTENSI AIR TANAH DAERAH KAMPUS UNDIP TEMBALANG Dian Agus, Widiarso Henarno, Pudjihardjo Wahyu, Prabowo Array Provision of clean water in an area need both now and future dating. Provision of clean water can be done by utilizing the potential of existing surface water and ground water. Geoelectric method is widely use for groundwater investigation. Geoelectric observations at 10 observation points can generate Aquifer Zone Map of Tembalang and surroinding areas. Diponegoro University 2012-07-12 10:30:29 https://ejournal.undip.ac.id/index.php/teknik/article/view/4381 TEKNIK; Volume 33, Nomor 2, Tahun 2012 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/57786 2025-04-17T01:00:27Z teknik:ART

"240830 2024 eng " 2460-9919 0852-1697 dc Coal Mine Slope Stability Analysis Using the Rock Mass Rating (RMR), Slope Mass Rating (SMR) Method, and Morgenstren-Price Limit Equilibrium for the Low Wall Pit Area Y PT. Bina Sarana Sukses, Lahat Regency, South Sumatra Najib, Najib Departemen Teknik Geologi, Universitas Diponegoro https://sinta.kemdikbud.go.id/authors/profile/6200773 https://orcid.org/0000-0001-8588-2812 Belia, Nanda Putri Departemen Teknik Geologi, Universitas Diponegoro Hidayatillah, Ahmad Syauqi Departemen Teknik Geologi, Universitas Diponegoro Nugroho, Kevin Setyo Adi PT. Bina Sarana Sukses Slope Stability; SMR; RMR; Limit Equilibrium, Coal Mining Open pit mining has a complex connection to excavation and stockpiling operations, which can potentially induce slope instability. The analysis of slope stability is crucial to prevent slope failure, which has the potential to result in major losses. The study on slope stability was performed at the low wall pit Y area of PT. Bina Sarana Sukses site MAS in Lahat Regency. This research aimed to analyze the rock mass classifications, determine the safety factor values, and provide recommendations for mitigating landslide occurrences. The techniques employed in this study include the RMR and SMR methods for assessing the susceptibility of landslides, collectively with the Morgenstern-price limit equilibrium approach for estimating the stability of the slope. Based on the analysis of the rock mass rating (RMR) and slope mass rating (SMR), Block B2 exhibits a 20% likelihood of experiencing landslides, specifically due to block joint characteristics. On the other hand, Blocks B4 and B5 show a 40% potential for landslides, primarily associated with flat or wedge-type block joints. The force produced by friction under saturated conditions is comparatively lower than that observed under dry conditions. During the final design phase in 2022, it was observed that Blocks B4 and B5 exhibit critical and dangerous safety factors when saturated. Hence, the proposal has been suggested to enhance slope stability. Further, it is recommended to monitor the geotechnical piles periodically. We hope this research results as a valuable resource for evaluating and assessing slope stability, including artificial and natural slopes. Diponegoro University 2024-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/57786 TEKNIK; Vol 45, No 2 (2024): August 2024 eng Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/17099 2020-04-17T09:35:09Z teknik:EI

"171229 2017 eng " 2460-9919 0852-1697 dc Back-matter Jurnal Teknik, Ketua Editor Departemen Teknik Elektro Universitas Diponegoro, Indonesia teknik; jurnal teknik Artikel editorial ini berisi back-matter jurnal Teknik Volume 38 Nomor 2 Tahun 2017 yang memuat petunjuk penulisan dan pengiriman artikel jurnal Teknik Diponegoro University 2017-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/17099 TEKNIK; Vol 38, No 2 (2017): (Desember 2017) eng Copyright (c) 2018 Teknik

oai:ojs.ejournal.undip.ac.id:article/1864 2012-02-15T03:26:54Z teknik:ART

2460-9919 0852-1697 dc PEMAKAIAN BALING-BALING BEBAS PUTAR (FREE ROTATING POPELLER) PADA KAPAL Julianto Sasono, Eko ship, propullsion, Free Rotating Propeller Propeller as a means of ship activator expand in phase for the shake of phase. Although that way in this timepropeller represent the mechanical ship activator appliance is which is at most used for the ship of from allsize measure and its type. Pursuant to the reason is above need of research and attempt to increase efficiencyof propulsi ship. One of research and attempt which have been done/conducted by free propeller turn around.Which free propeller turn around this exploit the free energi stream rotation (slip stream) from especialpropeller, while as ordinary propeller of this propeller can alter from free stream into energi push ( trusht ) Diponegoro University 2012-02-02 14:36:47 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1864 TEKNIK; Volume 30, Nomor 2, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/40899 2021-12-16T21:29:52Z teknik:ART

"211217 2021 eng " 2460-9919 0852-1697 dc Wijayanti, Wijayanti "Department of Architecture, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275" "Department of Architecture, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275". Lestari, Ria Ripardi Wahyu Penelitian ini terkait dengan fenomena aging in place yang menunjukkan pilihan orang tua yang berusia lanjut/ manula tetap tinggal di rumahnya. Fenomena tersebut terlihat di sebuah perumnas skala besar di wilayah pengembangan kota Semarang bagian selatan. Penghuni perumahan tersebut saat ini telah memasuki usia lebih dari 60 tahun. Hal ini menunjukkan pentingnya rumah bagi penghuni, Mereka telah menjadikan rumahnya sebagai homes seiring dengan proses menuanya. Dalam kegiatan sehari-harinya di dalam rumah, manula memiliki pandangan terhadap ruang-ruang yang sesuai dengan kebutuhan aktivitasnya. Penelitian ini bertujuan untuk mengetahui kategori ruang preferensi manula di dalam rumahnya sehingga aktivitas yang dilakukan dapat terakomodasi dengan baik. Dengan metode kualitatif, data utama yang digunakan adalah manula yang dapat mandiri dalam beraktifitas dan manula yang perlu bantuan dengan teknik observasi, wawancara, studi literatur dan dokumentasi. Dari kajian yang dilakukan, penelitian ini menghasilkan 3 kategori ruang preferensi manula yaitu : ruang personal, ruang interaksi dan ruang ibadah. Diponegoro University 2021-12-17 04:29:52 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/40899 TEKNIK; Vol 42, No. 3 (2021): December 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/6709 2017-08-04T07:05:14Z teknik:ART

"131203 2013 eng " 2460-9919 0852-1697 dc PENGARUH PERUBAHAN FUNGSI RUANG TERBUKA PUBLIK DI KOTA LAMA SEMARANG TERHADAP CITRA KAWASAN Rizka, Fadzilla Mahasiswa Magister Teknik Arsitektur Fakultas Teknik Undip Murtini, Titien Woro Dosen Teknik Arsitektur Fakultas Teknik Undip Suprapti, Atik Dosen Teknik Arsitektur Fakultas Teknik Undip Array Old City in Semarang as cultural reservation by Semarang undergone several changes over the times. One of that is change the function of public open space, every space change in an area affects on the image of the Old City in Semarang as the historical area. In the end, the change of public open space function affects on the image of The area of Old City in Semarang as Historical Area which existence is reserved. The purpose of this research is to acknowledge effects caused by the change of public open space function according to era development on the image of The area of Old City in Semarang as historical area fulfilled with buildings which have colonial architecture style. However, there are two kinds of variables in this research which are based on discussed research substance, they are independent variable which includes public open space function (ecology function, architectural/esthetical function, social function) and dependent variable which includes area image ( area identity, area structure, meaning of area). Both variables are analyzed using rationalistic quantitative method which techniques are multiple analysis technique and descriptive analysis. After doing analysis process, the results are: Taman Srigunting and Polder Tawang are successful to conduct each function, but generally, respondents say that Taman Srigunting is much better in doing its function as public open space than Polder Tawang. As for BTPN buiding, public agrees that the building disturbs the image of The area of Old City in Semarang because the design of the building does not adjust the neighborhood and the buildings surrounding it, and also, the condition of the empty building which is not taken care of and used gives more negative effect on the image of The area of Old City in Semarang. Conclusion drawn from this research is the existence of Taman Srigunting and Polder Tawang which have three functions as public open space such as ecology, esthetical, and social function, and the existence of BTPN building affect on the image of The area of Old City in Semarang. Key words :  function, open spaces, image Diponegoro University 2013-12-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/6709 TEKNIK; Volume 34, Nomor 3, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67533 2025-07-07T19:46:40Z teknik:TE

"250322 2025 eng " 2460-9919 0852-1697 dc Life Cycle Assessment and Emission Mass Balance of Cassava-Based Bioethanol: A Feasibility Analysis of Environmental Impacts from Upstream to Downstream in Indonesia Fatimah, Nur Ayu Department of Agricultural and Biosystem Engineering, IPB University, Raya Dramaga Street, Bogor, Indonesia 16680 Hakeki, Alliqa Zafira Department of Agricultural and Biosystem Engineering, IPB University, Raya Dramaga Street, Bogor, Indonesia 16680 Sucahyo, Lilis Department of Agricultural and Biosystem Engineering, IPB University, Raya Dramaga Street, Bogor, Indonesia 16680 Bioethanol, Cassava, Life cycle assessment (LCA), Emission mass balance, Vehicle energy transition Bioethanol is a promising alternative biofuel for reducing gasoline consumption. Indonesia's bioethanol industry is expanding to achieve the energy mix target through Pertamax Green 95. The government also focuses on energy transition and environmental concerns, especially in the transportation sector. This research aims to inventory and assess the impacts of bioethanol production from cassava in Indonesia and analyze the feasibility of bioethanol consumption in vehicle exhaust emissions. The research method utilizes Life Cycle Assessment (LCA) and emission mass balance as the essential analytical tools. The LCA analysis refers to SNI ISO 14040:2016 and SNI ISO 14044:2017, with a cradle-to-gate scope using ReCiPe 2016 Midpoint (H) to assess the potential environmental impact of Global Warming Potential (GWP), Stratospheric Ozone Depletion (SOD) and Terrestrial Acidification (TAC). Whereas vehicle emission feasibility is analyzed using the emission mass balance method to calculate emission concentrations. The research result shows the environmental impacts per liter of bioethanol production from cassava were GWP 11.88 kg CO2 eq, SOD 5.9x10-6 kg CFC11 eq, and TAC 0.04 kg SO2 eq. Emission feasibility analysis signifies that bioethanol combustion vehicles are lower than conventional gasoline. Therefore, it indicates energy and environmental added value through its life cycle. Diponegoro University 2025-02-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67533 TEKNIK; Vol 46, No 1 (2025) January 2025 eng https://ejournal.undip.ac.id/index.php/teknik/article/download/67533/221383 https://ejournal.undip.ac.id/index.php/teknik/article/download/67533/223274 Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/23342 2020-04-17T09:39:40Z teknik:ART

"190531 2019 eng " 2460-9919 0852-1697 dc Flood Disaster Mitigation Using a Disaster Early Warning and Monitoring Information System with an IoT-Based Arduino Microcontroller Danang, Danang Suwardi, Suwardi Hidayat, Ihsan Ardi IoT; early warning system; flood disaster mitigation; Arduino Sistem yang digunakan saat ini untuk mitigasi benca banjir adalah penjaga pintu mengecek ketinggian air pada meter air yang terpasang di bendungan. Ketika hujan turun sangat deras atau sebab lain yang mungkin berdampak banjir, petugas menyampaikan informasi menggunakan cara manual yaitu memukul kentongan untuk memberi peringatan kepada masyarakat sekitar untuk waspada karena ketinggian air berpotensi menimbulkan banjir. Artikel ini menyajikan hasil penelitian yang bertujuan untuk mitigasi bencana banjir dengan membangun sistem informasi monitoring dan peringatan dini bencana banjir menggunakan microcontroller Arduino berbasis Internet of Things. Sensor water level dipasang pada gerbang air sungai dihubungkan dengan perangkat Arduino Uno yang dilengkapi dengan SMS Gateway SIM900A. Sistem ini memantau ketinggian air tanpa lelah dan mengirimkan informasi kepada Tim SAR Desa Kedungjati dan Ketua RT di lingkungan sekitar gerbang air sungai ketika ketinggian air mendekati batas level atas bencana banjir. Teknologi IoT dalam penelitian ini digunakan untuk menyimpan data ketinggian air sungai dan menghidupkan sirine sebagai tanda peringatan bencana banjir ketika data yang diterima mencapai level awas banjir.   Diponegoro University 2019-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/23342 TEKNIK; Vol 40, No. 1 (2019): Mei 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1931 2012-08-08T06:08:30Z teknik:ART

2460-9919 0852-1697 dc EVALUASI KINERJA HEAT EXCHANGER DENGAN METODE FOULING F Setyoko, Bambang heat exchanger, fouling factor. The performance of heat exchangers usually deteriorates with time as a result of accumulation of depositson heat transfer surfaces. The layer of deposits represents additional resistance to heat transfer and causesthe rate of heat transfer in a heat exchanger to decrease. The net effect of these accumulations on heattransfer is represented by a fouling factor Rf , which is a measure of the thermal resistance introduced byfouling.In this case, the type of fouling is the precipitation of solid deposits in a fluid on the heat transfer surface.The mineral deposits forming on the inner and the outer surfaces of fine tubes in the heat exchanger. Thefouling factor is increases with time as the solid deposits build up on the heat exchanger surface. Foulingincreases with increasing temperature and decreasing velocity.In this research, we obtain the coefisien clean overal 5,93 BTU/h.ft2.oF, Dirt factor 0,004 BTU/h.ft2 0F,Pressure drope in tube 2,84 . 10-3 Psi and pressure drope in shell 4,93 . 10-4 Psi.This result are less thanthe standard of parameter. Its means this Heat exchanger still clean relativity and can operate continousslywithout cleaning. Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1931 TEKNIK; Volume 29, Nomor 2, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1680 2012-02-10T07:42:07Z teknik:ART

2460-9919 0852-1697 dc TANTANGAN SISTEM KOMUNIKASI LAUT DI INDONESIA SEBAGAI FAKTOR PENDUKUNG KESELAMATAN PELAYARAN Windyandari, Aulia Jurusan Teknik Perkapalan Fakultas Teknik Universitas Diponegoro Shipping safety, communication equipment Shipping safety topics lately skyrocketed in the surface and became a hot news, both print and electronic media,along with marine accidents which occurred in late 2006 and early 2007. The role of shipping safety in marinetransportation system is essential for this type of transport is reflected as full-tinged danger and threat of storms,fog, and the movements of the sea as waves, currents, sea corals, sedimentation and cruise lines are fixed andchanged. That’s why our shipping have very high risk, and therefore the safety aspects must be absolutelyguaranteed.Therefore necessary communication equipment that support the safety of the ship sailing. Due to sophisticatedcommunications equipment on board, will reduce the number of ship accidents and casualties in the case ofaccident in shipping. Diponegoro University 2012-02-02 14:47:08 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1680 TEKNIK; Volume 32, Nomor 1, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/25704 2020-04-17T09:40:37Z teknik:ART

"191231 2019 eng " 2460-9919 0852-1697 dc Salsabila, Syevira Politeknik Caltex Riau Trisnadoli, Anggy http://orcid.org/0000-0002-3808-5738 Muslim, Istianah http://orcid.org/0000-0002-5243-5415 Gender merupakan isu yang harus diperhatikan oleh setiap institusi pendidikan. Kesenjangan gender dalam berbagai masalah terkait pengelolaan institusi akan menimbulkan dampak terhadap ketidakadilan gender. Solusi dari permasalahan tersebut adalah adanya dokumen Rencana Strategi Pengarusutamaan Gender (Renstra PUG) pada setiap institusi pendidikan. Penelitian ini bertujuan untuk membangun sebuah Sistem Informasi Monitoring menggunakan metode Agile dengan model Dynamic System Development Model (DSDM) guna Mendukung Gender Mainstreaming Strategy. Studi kasus pada Politeknik Caltex Riau.  Sistem informasi yang dibangun mampu menampilkan informasi yang update dan akurat. Ini mendukung pimpinan institusi dalam pengambilan keputusan dan penentuan kebijakan terhadap gender. Hasil penelitian telah diuji secara fungsional dan divalidasi oleh expert Diponegoro University 2019-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/25704 TEKNIK; Vol 40, No. 3 (2019): Desember 2019 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2029 2012-02-21T03:03:26Z teknik:ART

2460-9919 0852-1697 dc SURVEI TOPOGRAFI UNTUK MENENTUKAN GARIS TAMPAK PANDANG BASE TRANSCEIVER STATION (BTS) Laila Nugraha, Arief Sudarsono, Bambang BTS (Base Transceiver Station), LoS (Line of Sight), Topographic Survey, Survey of GPS (Global Positioning System), Study Map Base Transceiver Station (BTS) representation one of appliance of supporter of telecommunicationsnetwork. The development of BTS have to each other in circuit by other BTS or which have been planned.The situation BTS in circuit between other BTS without obstacle are called Line of Sight (LoS). Thetopographic survey is method of survey work to make sure the Line of Sight BTS. The topographic surveyconsist of GPS survey and study map for determination of high of BTS antenna and the Line of Sight ofBTS can be made. Diponegoro University 2012-02-10 11:26:10 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2029 TEKNIK; Volume 28, Nomor 1, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/50304 2023-06-25T22:39:35Z teknik:ART

"230531 2023 eng " 2460-9919 0852-1697 dc Susanto, Novie Industrial Engineering Dept., Diponegoro University https://scholar.google.com/citations?user=DaIUTbsAAAAJ&hl=en Lumbantobing, Septina Graselia Prastawa, Heru Penyebab kecelakaan kerja dalam pekerjaan konstruksi masih didominasi oleh kurangnya pemahaman informasi, tingkat pengetahuan rendah dan persepsi pekerja rendah terkait kesehatan dan keselamatan kerja. Penelitian ini bertujuan untuk menilai persepsi risiko keselamatan kerja pada proyek. Penelitian ini dilakukan di Proyek Konstruksi tower Sutt dan pembangunan rel Kereta Cepat Jakarta-Bandung. Variabel penelitian ini dibagi menjadi empat variabel utama yakni perasaan aman atau tidak aman dalam melakukan proses kerja, persepsi pekerja menilai keseriusan kecelakaan yang mungkin terjadi, kecemasan pekerja mengalami kecelakaan kerja dan kecemasan kegagalan teknologi serta keyakinan pekerja bahwa tindakan pencegahan yang selama ini dilakukan sudah efektif. Metode pengumpulan data menggunakan teknik observasi, wawancara, dan kuesioner persepsi risiko yang mengadaptasi Municipal Public Health. Pengambilan data dilakukkan secara langsung (offline). Hasil penelitian menunjukkan bahwa proses kerja yang dilakukan cukup sulit dengan risiko bahaya yang tinggi dan pekerja masih sulit memahami area kerja, proses kerja dan standard keselamatan meskipun sudah dilakukan Toolbox meeting. Faktor lain yang berpengaruh terhadap persepsi risiko adalah faktor lingkungan, faktor atau dorongan sosial, dan dukungan apresiasi kerja sangat dibutuhkan oleh pekerja. Adanya kecukupan pengetahuan yang diterima membuat pekerja semakin waspada, memahami proses kerja yang dilakukan dan meningkatkan persepsi risiko pekerja Diponegoro University 2023-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/50304 TEKNIK; Vol. 44, No. 1 (2023): May 2023 ind Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/9637 2020-04-17T09:31:08Z teknik:ART

"160730 2016 eng " 2460-9919 0852-1697 dc Studi Kerentanan Air Tanah Terhadap Kontaminan Menggunakan Metode Drastic di Kota Pekalongan Putranto, Thomas Triadi Program Studi Teknik Geologi, Fakultas Teknik Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang Widiarso, Dian Agus Program Studi Teknik Geologi, Fakultas Teknik Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang Yuslihanu, Fatir Program Studi Teknik Geologi, Fakultas Teknik Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang Pekalongan; akuifer bebas; metode DRASTIC; kerentanan air tanah; Pekalongan; unconfined aquifer; DRASTIC method; groundwater vulnerability Kota Pekalongan berada di Pulau Jawa bagian Utara. Jumlah penduduk kota pekalongan setiap tahunnya mengalami peningkatan. Tahun 2008 jumlah penduduk Kota Pekalongan sebanyak 271.990 jiwa kemudian menjadi 290.347 di Tahun 2012.. Untuk memenuhi kebutuhan air, peduduk Kota Pekalongan menggunakan sumur gali yang menyadap air dari akuifer bebas atau akuifer dangkal. Air tanah bebas sangat rentan terhadap pencemaran akibat pengaruh letaknya yang dangkal dan aktivitas manusia. Oleh sebab itu diperlukan suatu kajian mengenai kerentanan air tanah terhadap kontaminan. Analisis dilakukan denganmenggunakan metode DRASTIC. Metode ini merupakan metode pombobotan berdasarkan beberapa parameter, yaitu: kedalaman muka air tanah (D), jumlah area recharge (R), litologi akuifer (A), jenis media tanah (S), topografi (T), jenis media zona tak jenuh air (I), dan konduktivitas hidrolika (C). Berdasarkan hasil analisis DRASTIC, terdapat tiga tingkat kerentanan yaitu: daerah tingkat kerentanan sedang dengan nilai DRASTIC Indeks (DI) 101-140, daerah tingkat kerentanan tinggi dengan nilai DI 141-180, dan daerah tingkat kerentanan sangat tinggi dengan nilai DI >180. [An Assessment of Groundwater Vulnerability of Contaminant Using DRASTIC Method in Pekalongan City] Pekalongan city which located on the north of Java Island is growing fast, in particular in the population growth. In 2008, total population in Pekalongan city was 271.990 inhabitants increased then up to 290.347 inhabitants in 2012. To fill the water necessary, people in Pekalongan city are using dug wells which are abstracted groundwater from the unconfined aquifer or shallow aquifer. Shallow groundwater can be vulnerabe which are influenced by surface and human activities. Thus, it requires an assessment of the groundwater vulnerability and risk of contaminant. It was analyzed by DRASTIC method. The DRASTIC method is applied by using weighted of some parameters, i.e.: groundwater Depth (D), amount of Recharge (R), Aquifer type (A), Soil type (S), topography (T), Impact of unsatuated zone (I), and hydraulic Conductivity (C). DRASTIC Index (DI) results in three vulnerability levels which are medium with DI 101-140, high with DI around 141-180 and above 180 for high vulnerable of contaminant. Diponegoro University 2016-07-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/9637 TEKNIK; Vol 37, No 1 (2016): (Juli 2016) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1741 2012-02-10T06:29:29Z teknik:ART

2460-9919 0852-1697 dc ANALISA FROUDE NUMBER EKONOMIS PADA KAPAL WISATA DI WADUK JATILUHUR DENGAN PENDEKATAN COMPUTATIONAL FLUID DYNAMIC (STUDI KASUS KM. JASATIRTA) Samuel, Samuel Manik, Parlindungan catamarans, resistance, Froude number, CFD. Model catamarans increasingly popular as a means of transportation of goods and people that needdevelopment to find out more in the interaction prisoners on the ship hull in order to achieve stability and betterresistance. KM Jasatirta is one of ship model catamaran (double hull) which is designed to support tourism inJatiluhur Reservoir. This study aims to find out more details interaction of the total prisoners in the ship's hullKM Jasatirta with Computational Fluid Dynamics approach.Research carried out several stages of manufacture of the Computational Fluid Dynamic model, simulationinput data, running simulations to converge, then analyzes the results of calculations by the methodSlenderBody, Delft Series, 98, and CFD. Analysis of the calculation includes the analysis of resistance, FroudeNumber economic , and comparative analysis of numerical calculation by the method of Computational FluidDynamics.The results of the analysis and calculation of reseach showed that the total ship resistance (Rt) at 2 knots boatspeed by using the CFD method at 0.37 kN, Delft method Series'98 of 0.14 kN, while the calculation method forSlender Body 0.04 kN and a analityc calculation by the method of Millward's of 0215 kN. And based on theresults of analysis of Froude number of the most economical in terms of aspects of the ship's speed is the methodof Computational Fluid Dynamics with a value of 0094 sedangan Fn projection calculation with a quadraticfunction then the value of accurate Fn Series'98 Delft method so it can be used as a reference calculation. Diponegoro University 2012-02-02 14:47:46 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1741 TEKNIK; Volume 32, Nomor 3, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/28148 2021-05-06T06:54:02Z teknik:ART

"201128 2020 eng " 2460-9919 0852-1697 dc Preliminary Study on The Utilization Of Seaweed and Green Grass Jelly Leaves as Candidate Alternatives for EOR Polymer Huljannah, Miftah Department of Petroleum Engineering, Riau Islamic University Lestari, Fitra Ayu Department of Petroleum Engineering, Riau Islamic University Erfando, Tomi Department of Petroleum Engineering, Riau Islamic University http://orcid.org/0000-0001-9902-8916 compatibility; polymer flooding; shear rate; salinity; viscosity Penurunan kapasitas produksi minyak mentah pada sumur tua yang disebabkan ketidakmampuan untuk mengangkat minyak ke permukaan dengan metode primer dan sekunder membutuhkan teknologi baru yang disebut tersier yaitu berupa injeksi polimer. Polimer yang biasa digunakan dalam injeksi polimer terbagi menjadi tiga yaitu polimer sintetis, biopolimer, dan polimer alam. Beberapa polimer alam yang serimg dijumpai yaitu rumput laut dan daun cincau. Penelitian ini bertujuan untuk mengidentifikasi polimer alternatif terbarukan sebagai material injeksi polimer dengan mengetahui karakteristik awal seperti viskositas, kompatibilitas dan pengaruh shear rate. Pengujian dilakukan dengan metode eksperimental yang memiliki beberapa tahapan yaitu pengeringan, penghancuran hingga menjadi bubuk, dan membuat larutan polimer pada salinitas yang berbeda. lalu polimer didiamkan selama lebih dari 24 jam hingga dilakukan pengujian. Polimer yang diuji berasal dari beberapa bahan yaitu rumput laut, daun cincau, dan xanthan gum sebagai pembanding. Parameter yang digunakan yaitu konsentrasi polimer yang dilarutkan pada berbagai  salinitas. Hasil pengujian yang diperoleh menunjukkan bahwa karakteristik dari rumput laut dan daun cincau hijau terhadap kontrol memiliki kesamaan yaitu mengalami penurunan viskositas seiring meningkatnya salinitas. Larutan rumput laut dan daun cincau bersifat kompatibel dengan air formasi ditunjukkan dengan campuran larutan yang homogen dan tidak terdapat gumpalan serta uji shear rate menunjukkan bahwa polimer yang terbentuk bersifat pseudoplastik.   Diponegoro University 2020-11-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/28148 TEKNIK; Vol 41, No. 3 (2020): December 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/3787 2012-07-18T08:47:52Z teknik:ART

"120409 2012 eng " 2460-9919 0852-1697 dc MODEL DEFORMASI GETAS DI ZONA SESAR KALIGARANG (KGFZ) SEMARANG: STUDI AWAL PENGAMATAN MIKROSTRUKTUR MENGGUNAKAN METODE PETROGRAFI Fahrudin, Fahrudin Winarno, Tri Array Brittle deformation at Kaligarang fault zone result strain changes. That strain is microstructure.Microstructures can see closely petrography. That observation include grain form, microcrack can form atcontact point like Hertzian and diagonal intragranular microcracks. Grain forms over angular, straight, andconcoidal. Grain of crystal or lithic fragments floating at matrik or cements. Microcrack growth does not onlydepend on stress, but also on temperature and chemical environment, especially of the fluid in the crack. Diponegoro University 2012-07-12 10:29:15 https://ejournal.undip.ac.id/index.php/teknik/article/view/3787 TEKNIK; Volume 33, Nomor 1, Tahun 2012 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/56423 2025-04-24T18:11:04Z teknik:ART

"240613 2024 eng " 2460-9919 0852-1697 dc Widayat, Widayat Department of Chemical Engineering, Diponegoro University, Jl. Prof. Soedarto, Kampus Undip Tembalang, Semarang 50275 https://sinta3.kemdikbud.go.id/profile Arman, Mhd. Adithia Perdana Syarief, Elijah Buchori, Luqman Sulardjaka, Sulardjaka Pengembangan katalis CaO-MgO/Fe2O3 dari dolomit dan pasir besi dilakukan pada penelitian ini.  Penelitian bertujuan untuk mengetahui karakteristik kimia dan fisika katalis CaO-MgO/Fe2O3 serta kinerjapada produksi biodiesel. Sintesis katalis dilakukan dengan metode impregnasi, dimana fasa CaO-MgO terlebih dahulu didapatkan dari dolomit dengan metode kalsinasi. Fe2O3 dihasilkan dari pasir besi dengan metode ko-presipitasi yang melibatkan larutan asam dan basa. Pengaruh komposisi CaO-MgO dan Fe2O3 terhadap yield biodiesel dikaji dengan melakukan variasi rasio CaO-MgO : Fe2O3 sebesar 1:1, 2:1 dan 3:1. Variasi temperatur kalsinasi katalis dilakukan pada 800oC, 900oC dan 1000oC untuk mengetahui pengaruh karakteristik fisik terhadap produksi biodiesel. Karakterisasi katalis dengan menggunakan metode SEM-EDX menunjukkan struktur morfologi dan komposisi elemen pada katalis. Biodiesel yang diproduksi dengan katalis CaO-MgO/Fe2o3 memiliki standar mutu sesuai SNI 7182: 2015. Katalis dengan rasio CaO-MgO : Fe2O3 sebesar 3:1 yang dikalsinasi pada temperatur 900oC menghasilkan yield biodiesel tertinggi yaitu 54,2%. Katalis CaO-MgO/ Fe2O3 dapat digunakan dalam produksi biodiesel dengan reaksi esterifikasi dan trans esterifikassi secara simultan dan dibutuhkan peningkatan kinerja lebih lanjut sehingga lebih ekonomis. Diponegoro University 2024-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/56423 TEKNIK; Vol. 45, No. 1 (2024): May 2024 ind Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/12942 2020-04-17T09:34:20Z teknik:ART

"171229 2017 eng " 2460-9919 0852-1697 dc Identifikasi Jenis dan Karakteristik Lempung di Perbukitan Jiwo, Bayat, Klaten dan Arahannya sebagai Bahan Galian Industri Winarno, Tri Departemen Teknik Geologi, Universitas Diponegoro Kurniasih, Anis Departemen Teknik Geologi, Universitas Diponegoro Marin, Jenian Departemen Teknik Geologi, Universitas Diponegoro Kusuma, Ari Istiqomah Departemen Teknik Geologi, Universitas Diponegoro Perbukitan Jiwo; Bayat; Mineral Lempung; XRD; XRF; Manfaat Lempung Perbukitan Jiwo di Bayat, Klaten, merupakan suatu inlier dari batuan Pra-Tersier dan Tersier di sekitar endapan Kuarter. Perbukitan Jiwo tersebut mempunyai kondisi geologi yang kompleks. Salah satu batuan yang menyusun Kompleks Perbukitan Jiwo adalah batuan metamorf   berupa sekis dan filit. Batuan metamorf  tersebut  telah  mengalami  pelapukan  yang  intensif,  ditandai  dengan  hadirnya  soil  yang berwarna merah. Hasil pelapukan batuan metamorf tersebut berupa lempung yang telah dimanfaatkan oleh  penduduk sekitar sebagai bahan pembuatan gerabah.  Tujuan dari penelitian ini  adalah untuk mengidentifikasi jenis mineral lempung di Perbukitan Jiwo dan juga karakteristik fisik dan kimia dari mineral lempung tersebut untuk melihat potensi lempung untuk bidang industri. Metode analisis yang digunakan dalam penelitian ini adalah dengan metode analisis XRD untuk mengetahui karakteristik mineralogi lempung, analisis XRF untuk mengetahui kandungan kimia lempung dan metode analisis fisik untuk mengetahui karakteristik fisik dan megaskopis lempung. Berdasarkan hasil analisis, jenis mineral lempung yang dijumpai adalah  kaolinit, smektit  dan  serisit.  Lempung tersebut dapat  dimanfaatkan sebagai bahan pembuatan gerabah. Lempung tersebut tidak dapat digunakan dalam industri lain seperti farmasi, kosmetik dan kertas karena tidak memenuhi persyaratan kadar kimia Diponegoro University 2017-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/12942 TEKNIK; Vol 38, No 2 (2017): (Desember 2017) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1820 2012-02-15T03:18:19Z teknik:ART

2460-9919 0852-1697 dc IKON KOTA SEMARANG Ediati, Murni As we know that our forefather’s culture inheritance should protected such as the old historical building,monument and so on. We should not just close our eyes and then ignore it. Lawangsewu building is one ofthe old historical buildings as a landmark and icon for the City of Semarang. It is also a national culturalasset and one of the tourism resorts so basically it’s dealing with the Indonesian law, regulation and thegovernment’s authority.Actually there are a lot of foreign and domestic investors who want to use Lawangsewu building as a hotelbut usually it has been just a topic without an action. Nowadays, most of the historical buildings inSemarang are ‘lost’ and it has been uncountable how many of them were lost because of the economic andpolitical reason.The City of Semarang’s government has goodwill on planning and managing toward the Lawangsewubuilding because of the terribly condition of it (there is a lot of damaged because of a lot of exhibition weretook place in that building). One of the plans was about using it as Semarang Tourism and CultureDepartment, Semarang Centre of Tourism Information, Centre of Planning and Development Information ofThe City of Semarang.Recently there are some creative and innovative ideas appears to utilize the old historical buildings. Itmeans that now our people are understood about the significance of ‘the mute witness’ of our city’s history.Let us together make Semarang as the greatest city. For me the great city is the city which has a past,present and future. The great city always be an ideal city for all of us. Diponegoro University 2012-02-02 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1820 TEKNIK; Volume 30, Nomor 1, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/32940 2021-08-29T17:46:58Z teknik:ART

"210826 2021 eng " 2460-9919 0852-1697 dc Coastline Modeling Using Stacked Curve Spline Tension Interpolation Oktaviani, Nadya Badan Informasi Geospasial https://orcid.org/0000-0003-4563-2071 Hartanto, Prayudha Badan Informasi Geospasial https://orcid.org/0000-0002-8995-7639 Susetyo, Danang Budi Badan Informasi Geospasial Kusuma, Hollanda Arief Universitas Maritim Raja Ali Haji Ardhitasari, Yustisi Badan Informasi Geospasial https://orcid.org/0000-0002-3475-9192 Dewi, Ratna Sari coastline; DEM; modelling; bathymetry; stacked curve spline tension Wilayah pesisir merupakan lingkungan dinamis yang dipengaruhi oleh interaksi atmosfer, daratan dan lautan. Demikian pula, posisi garis pantai juga selalu berubah karena komponen alami dan ulah manusia seperti erosi, gelombang, pasang harian, badai, dan pembangunan yang terjadi di kawasan pesisir. Dalam literatur, posisi garis pantai dapat diidentifikasi berdasarkan berbagai proxi seperti: fitur pantai yang diidentifikasi dari foto udara atau citra resolusi sangat tinggi dan indikator berbasis datum pasang surut yang diekstraksi dari survei lapangan. Penelitian ini mengusulkan suatu metode dalam memodelkan garis pantai berbasis datum dengan mengintegrasikan berbagai data batimetri termasuk data single beam dan multibeam echo sounding, Digital Elevation Model Nasional, data batimetri nasional dan data batimetri yang dihasilkan dari citra satelit. Metode stacked curve spline tension diterapkan untuk mengasimilasi berbagai data batimetri tersebut dan untuk membangun garis pantai. Berdasarkan hasil uji akurasi diperoleh kemiripan garis pantai yang bervariasi akurasinya yaitu garis pantai LAT memiliki tingkat akurasi sebesar 29.28%, garis pantai MSL sebesar 65.45% dan garis pantai HAT sebesar 47.48%. Variasi akurasi yang diperoleh dapat terjadi karena beberapa hal diantaranya minimnya data input kedalaman yang digunakan, kerapatan data kedalaman yang sangat bervariasi, perbedaan waktu perolehan data antara data yang digunakan untuk penyusunan Peta LPI dan data yang digunakan dalam penelitian ini. Meskipun hasil uji akurasi yang diperoleh masih kurang memuaskan metode yang disusulkan ini cukup menjanjikan untuk diadopsi sebagai metode alternatif dalam pembangunan garis pantai dan untuk mengatasi keterbatasan data, waktu dan biaya dalam penyediaan garis pantai nasional. Diponegoro University 2021-08-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/32940 TEKNIK; Vol. 42, No. 2 (2021): August 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/5630 2017-07-19T17:16:49Z teknik:ART

"130913 2013 eng " 2460-9919 0852-1697 dc STUDI OZONISASI SENYAWA ORGANIK AIR LINDI TEMPAT PEMROSESAN AKHIR SARIMUKTI Rezagama, Arya Array Existing treatment leachate from Sarimukti Landfill doesn’t meet the quality standards of waste water. Preliminary treatment is necessary to break down persistent leachate compounds. Ozone can act directly or indirectly with organic material (Glaze 1986). Column batch reactor system use one liter volume. Ozone is pumped into the leachate in the form of fine bubbles. Variations include Ozone Pumping Flow, Ratio of high/diameter (t/d), and pH. Kinetic Reaction of oxygen dissolution in the average leachate is zero order. Increased pumping air discharge and increased pH makes ozone transfer process better. Best value occurs at pH 11, where the value of the reaction rate constant ozone 1.48. The average percentage of organic material allowance 31% COD and 26% TOC. The decline TOC and COD have a tendency to be influenced by the pH optimum 8-9. At alkaline pH makes carbonate (CO3) formed the greater, that make ozone compounds kill quickly. FTIR results showed the intensity of hydroxyl groups increased after ozone oxidation where the substitution of functional groups of organic matter associated with electrophilic addition reaction of oxygen atoms. Existence Fulfic acid also increased the effect compounds and Humic Acid, Humad large has been cut by radicals. Diponegoro University 2013-10-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/5630 TEKNIK; Volume 34, Nomor 2, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67856 2025-07-07T19:30:43Z teknik:ART

"250331 2025 eng " 2460-9919 0852-1697 dc Setyawanto, Ega Rizky Department of Civil Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275|Universitas Diponegoro Wulandari, Dyah Ari A dam is a structural construction built to retain or store water and serves to distribute water for raw water supply, irrigation, and hydroelectric power generation. Margatiga Dam is the third and most downstream dam in the Sekampung River Cascade Dam System in Lampung Province. It functions to supply irrigation and raw water as well as to control floods. To meet water demand, an analysis of water availability is necessary to determine the difference between water availability and demand. This study aims to determine the water availability discharge during wet, normal, and dry years at Margatiga Dam. The study uses satellite rainfall data calibrated with ground station rainfall data from 2001 to 2023. The methods used include satellite rainfall data correction, potential evapotranspiration analysis using the modified Penman method, flow discharge analysis using the F.J. Mock method, and reliable discharge analysis using the Weibull method. The results show that the water availability discharge at Margatiga Dam is 13.96 m³/s in a wet year, 10.34 m³/s in a normal year, and 8.13 m³/s in a dry year. Diponegoro University 2025-03-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67856 TEKNIK; Vol 46, No 2 (2025) April 2025 ind Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/22354 2020-03-17T01:24:52Z teknik:EI

"181231 2018 eng " 2460-9919 0852-1697 dc Teknik, Editor in Chief Artikel editorial ini berisi front-matter jurnal Teknik Volume 39 Nomor 2 Tahun 2018, yaitu meliputi halaman sampul, fokus dan ruang lingkup Teknik, informasi indeksasi, susunan tim penyunting dan mitra bebestari, kata pengantar editor dan daftar isi. Diponegoro University 2018-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/22354 TEKNIK; Vol 39, No. 2 (2018): Desember 2018 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1911 2012-02-24T11:23:19Z teknik:ART

2460-9919 0852-1697 dc PEMANFAATAN KREDIT MIKRO PERUMAHAN BAGI MASYARAKAT BERPENGHASILAN RENDAH DI BMT MITRA KHASANAH KOTA SEMARANG Esariti, Landung Nirwanto, Anang housing micro finance system for low income Since 2006, government has started to launch the housing micro finance system for low incomehousehold, and has been implemented in Jakarta, Semarang, Solo and other big cities. In Semarang, thehousing micro finance is used for early home construction and home renovation. This research is todefine the contribution between two implementation of housing micro finance and BMT Mitra Khasanahis selected as a case study. This investigation used the triangulation method, and is supported with theusing of dicriminant technique analysis, scoring and frequency distribution. About 17 respondent areinterviewed, and they have been facilitated by BMT Mitra Khasanah.The research reveals that 83% of housing micro finance application in Genuk is for home renovation,while 17% is for early home construction. There are 3 dominant factors influenced the applicatio;,namely the economy, installment ability and home condition. The results shows that the applicationwould be very useful if there have been an initation to facilitate the low income household in technicaland managerial assistance. Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1911 TEKNIK; Volume 29, Nomor 1, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/46436 2025-07-07T19:35:10Z teknik:EI

"220531 2022 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi front-matter TEKNIK Volume 43 Nomor 1 Tahun 2022, yaitu meliputi halaman sampul, fokus dan ruang lingkup TEKNIK, informasi indeksasi, susunan tim penyunting dan mitra bebestari, kata pengantar editor dan daftar isi. Diponegoro University 2022-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/46436 TEKNIK; Vol. 43, No. 1 (2022): May 2022 ind Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/6357 2019-07-04T14:01:38Z teknik:ART

"141010 2014 eng " 2460-9919 0852-1697 dc PENYUSUNAN SKENARIO KEBIJAKAN UNTUK PENGEMBANGAN BRT TRANS SEMARANG DENGAN PENDEKATAN SISTEM DINAMIK Susanty, Aries Program Studi Teknik Industri, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, 50275 Nugroho, Susatyo Program Studi Teknik Industri, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, 50275 Khantari, Kumala Ade Program Studi Teknik Industri, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, 50275 Array [Preparation for Policy Scenarios for Developing the Bus Rapid Transit (BRT) Trans Semarang with Dynamic System Approach] Related to the complexity of the problem faced by Bus Rapid Transit (BRT) Trans Semarang, this research attempts to develop a framework for dynamic development of BRT Trans Semarang and provide a platform to support policy making related to performance improvement of BRT Trans Semarang. This research use system dynamics (SD) methodology. There are three scenarios constructed in this research and then a system dynamics model built based on them for the next five years. The first scenario is providing some feeder that will take the passenger on the bus, the second scenario is providing some new bus, and the third scenario is a combination of providing a number of feeders and also some new bus. There are three criteria which are used to evaluate the result of each scenario, i. e the achievement of the target of load factor (greater than 70%), the amount of total subsidy for operational of BRT, and percentage of the number of people that change their moda of transportation, from using private vehicles to BRT. The result of simulation with system dynamic indicated that scenario 1 is better than the existing condition; scenario 1 also better than scenario 2 or scenario 3. By providing some feeder, operational BRT can achieve the target of load factor at month 15, the government also does not need to issue subsidies for operational of BRT Trans Semarang, as well as the percentage of the number of people who moved from using private vehicles reached 26%. Diponegoro University 2014-10-20 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/6357 TEKNIK; Vol 35, No 1 (2014): (July 2014) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/23742 2020-07-10T16:18:53Z teknik:ART

"200531 2020 eng " 2460-9919 0852-1697 dc Hasibuan, Samsul Kurniati, Dwi Flat slab adalah kontruksi pelat beton bertulang tanpa balok. Keuntungan yang dapat diperoleh adalah mengurangi ketinggian perlantai, mengurangi beban struktur, penghematan penggunaan plafon, penulangan yang lebih sederhana, dan pemasangan perancah dan bekisting yang ekonomis dalam membangun suatu bangunan gedung. Artikel ini memuat studi redesain struktur Gedung Awana Condotel Yogyakarta menggunakan metode flat slab di bawah zona gempa. Sistem Rangka Pemikul Momen Khusus (SRPMK) diperoleh dari perhitungan manual dan software ETABS 2016. Parameter yang ingin diketahui adalah dimensi dan penulangan pelat lantai, pelat atap, kolom, dan drop panel serta lendutan yang terjadi pada pelat. Hasil analisis dan perhitungan dimensi struktur menggunakan metode flat slab didapatkan tebal pelat lantai 210 mm, tebal pelat atap 150 mm, tebal drop panel 300 mm dengan lebar drop panel 2000 mm baik arah x maupun y, dan menggunakan dimensi kolom 1 yaitu 800 mm x 800 mm dan dimensi kolom 2 yaitu 400 x 400 mm. Lendutan yang terjadi pada pelat yaitu sebesar 0,17 mm untuk pelat lantai dan 0,30 mm untuk pelat atap. Analisa menggunakan software ETABS 2016 menunjukkan struktur gedung dengan periode (T) sebesar 1,04 detik. Diponegoro University 2020-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/23742 TEKNIK; Vol 41, No. 1 (2020): May 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1963 2012-02-24T11:16:25Z teknik:ART

2460-9919 0852-1697 dc INVESTIGASI NON DESTRUKTIF DENGAN PROFOMETER Hariwarsianto, Hariwarsianto Narayudha, Moga fine aggregates, concrete, compression strength, slump, clay lump’s content Concrete structures obtain their strength and load carrying capacity from the compatibility of concrete’scompression capacity and steel’s tensile strength. When a structure is in service, the concretecompression strength can easily be measured with all kinds of equipment, both non destructive, semi anddestructive.While the methods of analysis concrete in existing buildings is fairly straight forward and widely known,the determination of reinforcement embedded in the concrete is a more complicated matter. Beside thesteel’s tensile strength, the bar’s configuration is very important, since the load carrying capacity isdepending on it. One destructive method is to un-mantle the bars and observes and measures the sizesand configuration manually. This will involve not only skilled labor but is time consuming and costly.One technology to overcome these difficulties is the use of rebar locators. The measuring method is basedon the eddy-current principle with pulse-induction. Important data as concrete cover, bar configurationand bar size can be obtained. This paper will discuss the principles of rebar locators, and will include acase study where structural capacity is calculated based on non destructive testing Diponegoro University 2012-02-02 14:39:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1963 TEKNIK; Volume 29, Nomor 3, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/46499 2023-01-24T23:37:53Z teknik:ART

"230105 2023 eng " 2460-9919 0852-1697 dc Water Resource Management in Developing Countries: Synthesizing the Literature Sriyono, Edy Department of Civil Engineering, Faculty of Engineering, Janabadra University Jl. Tentara Rakyat Mataram N0. 55-57 Yogyakarta 55231 https://orcid.org/0000-0001-5869-6328 water resources; water management; developing world; sustainability; review The literature on water management is extensive, yet most publications have been concerned with the context of the developed world and much less with the developing context. This study aims to examine the extant research, provide an overview of the empirical research in the field of water resource management in a developing context, and provide several future research suggestions. To perform this analysis, we use R and Scimeetr to compile the resources and visualize the result systematically. The raw data were then reviewed and analyzed further. We find evidence that the field of water resource management in a developing-world context is presently divided into five major themes: water resources, water quality, water management, sustainability, and climate change. We find evidence, too, that most literature in the field of water resource management in developing contexts ironically came from developed countries, such as the United States (265), the United Kingdom (128), and China (98). It is expected that this study could be used as a stepping stone to move the literature on water resource management, particularly in the developing world, forward. Diponegoro University 2022-12-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/46499 TEKNIK; Vol. 43, No. 3 (2022): December 2022 eng Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/8571 2016-01-07T03:59:04Z teknik:ART

"151210 2015 eng " 2460-9919 0852-1697 dc KINETIKA REAKSI ESTERIFIKASI GLISEROL DAN ASAM ASETAT MENJADI TRIACETIN MENGGUNAKAN KATALIS ASAM SULFAT Satriadi, Hantoro Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang gliserol; asam asetat; esterifikasi; triacetin; konversi; glycerol; acetic acid; esterification; triacetin; conversion Biodiesel merupakan salah satu energi alternatif yang diharapkan dapat menggantikan bahan bakar diesel. Gliserol merupakan produk dengan produksi biodiesel dari reaksi transesterifikasi. Gliserol saat diesterifikasi dengan asam asetat untuk membentuk triacetin. Kegunaan triacetin sangat baik untuk makanan dan non makanan. Untuk bahan makanan, triacetin dapat digunakan sebagai bahan aroma dalam permen, minuman dari susu, minuman ringan dan permen karet. Adapun non-makanan dapat digunakan untuk pelarut pada parfum, tinta cetak, pelarut dalam rasa, plasticizer untuk resin selulosa, polimer dan co-polimer, bahkan dapat digunakan sebagai bahan aditif bahan bakar untuk mengurangi knocking di mesin mobil. Dalam penelitian ini akan diperoleh kondisi optimum pembuatan triacetin. Volume total gliserol dan asam asetat 600 ml, kecepatan pengadukan 100 rpm dan berat katalis adalah 5% berat gliserol. Dalam penelitian ini proses analisis kualitatif dengan menggunakan instrumen FTIR telah mendeteksi adanya produk triacetin. Hasil analisis kuantitatif diperoleh persamaan kecepatan reaksi esterifikasi dan kondisi optimum yang dihasilkan pada rasio mol reagen gliserol dan asam asetat 1:7 dengan temperatur 120 oC pada menit ke-5 dengan nilai konversi sebesar 67,63%. [Title: Kinetics of Esterification Reaction of Triacetin Formation from Glycerol and Acetic Acid Using Sulfuric Acid Catalyst] Biodiesel, as one of alternative energy, is expected to replace diesel fuel. Glycerol is a by product of biodiesel production from transesterification reaction. The glycerol was esterified with acetic acid to form triacetin. The triacetin was useful for food and non- food application. For food application, the triacetin can be used as a fragrance ingredient in candy, beverages from milk, soft drinks and chewing gum. Meanwhile, for non-food materials, it can be used for solvent triacetin on perfumes, printing ink, solvent in flavor, plasticizer for cellulose resin, polymer and co-polymers, it can even be used as fuel additives to reduce knocking in car engines. In this study, the research results in optimum conditions on manufacturing triacetin. Total volume of glycerol and acetic acid is 600 ml, stirring speed is 100 rpm and the catalyst laoding is 5 wt.% glycerol. From qualitative analysis using FTIR, the triacetin product was detected. From quantitative analysis, the rate equation of esterification reaction and optimum conditions were resulted at mole ratio of glycerol and acetic acid of eagents 1:7, temperature of 120 0C at 5 minutes process and the conversion of 67.63%. Diponegoro University 2015-12-09 12:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/8571 TEKNIK; Vol 36, No 2 (2015): (December 2015) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1732 2012-02-10T06:41:42Z teknik:ART

2460-9919 0852-1697 dc KEBUTUHAN FASILITAS PENYEBERANG JALAN DENGAN METODE GAP KRITIS (Studi Kasus Jalan Raya Semarang – Kendal Km. 16.50) Wicaksono, Y.I. Siswanto, Joko Arterial road, pedestrian, Critical Gap, Zebra Cross This study want to measure the performance of pedestrian facilities ( zebra cross), particularly the critical gapanalysis to see the level of opportunity to cross the street safely. To support the recommendations that will be setin addition to the critical gap method will be investigated also waiting time and total time to cross the street andanalysis of types of facilities based on the volume of pedestrian and vehicle volume as the raw determination ofthe crossing facility.From some discussion can be summarized that according to the study analyzes the volume of pedestrian andvehicle volumes obtained by the recommended pedestrian facilities according to standard determination of thecrossing facility is the type of pelican crossing with a separator. Based on the analysis of waiting time to crossthe street, 93% require pedestrian waiting time, with the average waiting time to cross and the total time tocross at that location, which is 56.61 seconds and 79.25 seconds. The condition is very far from the pedestrianshould not waiting more than 30 seconds.Results of analysis of critical gaps, both based on the critical gap only in the morning or combined critical gapin the morning and afternoon shows very little chance of crossing the road owned by the defector, on themorning of 7 times for critical gap in only the morning and 11 times for a combination of critical gap Total 125waders for 06.30 until 7:30 pm, and 20 times based on a critical gap only in the morning a and 29 times forcritical gap combination of pedestrian total of 66 people over at 07.30 until 08:30 pm.Thus based on the results of some analysis that has been done can be concluded that pedestrian facilities are noteffectively to use zebra cross type . The proposed type of road crossing facilities on arterial roads for thepedestrian to use a pedestrian facility type like overpass or underpass to eliminate conflicts between thevehicle flow and a pedestrian crossing. Diponegoro University 2012-02-02 14:48:56 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1732 TEKNIK; Volume 32, Nomor 2, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/29391 2020-10-05T04:56:22Z teknik:ART

"200831 2020 eng " 2460-9919 0852-1697 dc Verifikasi Deep-V Planing Hull Menggunakan Finite Volume Method Pada Kondisi Air Tenang Samuel, Samuel Departemen Teknik Perkapalan, Universitas Diponegoro Jokosisworo, Sarjito Departemen Teknik Perkapalan, Universitas Diponegoro Iqbal, Muhammad Departemen Teknik Perkapalan, Universitas Diponegoro Manik, Parlindungan Departemen Teknik Perkapalan, Universitas Diponegoro Rindo, Good Departemen Teknik Perkapalan, Universitas Diponegoro computational fluid dynamic; dynamic fluid body interaction; kapal cepat Aspek paling penting pada proses desain kapal cepat adalah memprediksi hambatan, trim dan perubahan titik gravitasi. Prediksi hambatan total harus memiliki akurasi yang baik untuk meningkatkan efisiensi dalam desain kapal cepat,. Pengujian eksperimen menggunakan towing tank adalah salah satu cara yang digunakan untuk memprediksi hambatan kapal. Metode alternatif lain yang dapat digunakan adalah metode Computational Fluid Dynamics (CFD). Metode ini menjadi trend di industri maritime karena biaya pengujian eksperimen pada towing tank semakin mahal dan diikuti dengan perkembangan ilmu dan teknologi tentang mekanika fluida menggunakan metode Computational Fluid Dynamics (CFD) yang sangat pesat. Penelitian ini bertujuan untuk untuk memverifikasi performa kapal cepat menggunakan metode komputasi. Metode CFD yang digunakan untuk menyelesaikan permasalahan mekanika fluida ini adalah dengan menggunakan persamaan Reynolds-Averaged Navier-Stokes untuk menggambarkan model turbulensi dengan k-ε, dengan menggunakan aliran multiphase Euler yang diasumsikan air dan udara. Dynamic Fluid Body Interaction (DBFI) adalah modul yang mensimulasikan gerakan benda sebagai respon terhadap gaya yang diterapkan oleh kontinum fisika. DBFI heave dan pitch pada penelitian ini diasumsikan bergerak bebas untuk dapat menghitung gerakan kapal. Hasi penelitian ini menunjukkan bahwa CFD dapat membantu dalam mempredisksi hambatan, trim dan kenaikan titik gravitasi. Diponegoro University 2020-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/29391 TEKNIK; Vol 41, No. 2 (2020): August 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2139 2012-02-24T02:46:38Z teknik:ART

2460-9919 0852-1697 dc LIFE CYCLE ASSESSMENT OF PAPER TOWEL AND ELECTRIC DRYER AS HAND DRYING METHOD IN THE UNIVERSITY OF MELBOURNE Hapsari Budisulistiorini, Sri life cycle assessment, paper towel, electric dryer, SimaPro, Eco-Indicator 99 Nowadays products, services, or technologies are proactively evaluated toward environmental performance byusing the life cycle assessment (LCA). The assessment cover the whole life cycle from cradle to grave hence theproduct performance can be analyzed or compared with others for product development or for making adecision. The University of Melbourne currently installed towel dispenser by means of hand drying method inthe entire campus. As some has suggested that electric dryer will provide more sustainable service than papertowel, a LCA study will be a good approach for comparing both methods. The study utilizes SimaPro softwareto generated database for impact assessment. The assessment method used in this study is Eco-Indicator 99.From the LCA study, electric hand dryer performed better in most of indicators. Electric hand dryer istherefore recommended to be used in the entire campus of the University of Melbourne Diponegoro University 2012-02-10 11:25:01 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2139 TEKNIK; Volume 28, Nomor 2, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/59399 2025-04-24T18:11:04Z teknik:ART

"240613 2024 eng " 2460-9919 0852-1697 dc Mufrodi, Syahrizal Department of Civil Engineering, Faculty of Engineering, Diponegoro University, Jl. Prof Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Sriyana, Ignatius Bendungan Pamukkulu direncanakan untuk mereduksi banjir Sungai Pappa hingga 29% terhadap debit desain QPMF. Banjir disebabkan tingginya debit di sungai yang dipengaruhi oleh intensitas hujan dan limpasan permukaan. Fakta di lokasi menunjukkan adanya perubahan karakteristik DAS yang ditunjukkan dari peningkatan curah hujan maksimum dari tahun 2013 hingga tahun 2022 dan kecenderungan penurunan indeks tutupan vegetasi. Penelitian ini bertujuan untuk memperoleh kontribusi perubahan karakteristik DAS seperti curah hujan harian maksimum dan perubahan tutupan lahan  terhadap perubahan hidrograf banjir dan pengaruhnya terhadap kondisi keamanan Bendungan Pamukkulu dari bahaya terjadinya overtopping. Penelitian diawali dengan pengumpulan data, kemudian menganalisis distribusi hujan-jaman, analisis debit banjir rancangan, dan penelusuran banjir dengan Metode Level Pool Routing dan pemodelan HEC-HMS, Hasilnya menunjukkan debit banjir rancangan cenderung meningkat, khususnya pada QPMF meningkat mencapai 1652,27 m3/detik (3,45%) dengan metode HSS ITB-1, dan 1893,37 m3/detik (18,54%) dengan model HEC-HMS. Meningkatnya debit banjir menyebabkan perubahan elevasi muka air maksimum waduk pada debit banjir QPMF naik sebesar 0,04 m hingga 0,08 m di atas Muka Air Banjir (MAB) rencana (+129,68 m), dimana nilai ini masih dibawah elevasi puncak bendungan (+131,50 m) sehingga menunjukkan Bendungan Pamukkulu aman dari potensi terjadinya overtopping. Diponegoro University 2024-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/59399 TEKNIK; Vol. 45, No. 1 (2024): May 2024 ind Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/9073 2020-04-17T09:33:01Z teknik:ART

"170701 2017 eng " 2460-9919 0852-1697 dc Aplikasi Pembelajaran Interaktif “Perang Padri” Menggunakan X-Box Kinect Untuk Meningkatkan Minat Siswa Dalam Mempelajari Sejarah Bangsa Indonesia Ramadhona, Azka Politeknik Caltex Riau Dewi, Meilany Program Studi Teknik Komputer Politeknik Caltex Riau, Pekanbaru 28265 Henim, Silvana Rasio Program Studi Teknik Komputer Politeknik Caltex Riau, Pekanbaru 28265 History; Perang Padri; Kinect; 3D’s animation A well recognition and understanding national history plays an important role in shaping the character of nation, especially Padri War history which tells about a dispute between two clans but then allied to defend against invaders. History’s subject in school which is taught by telling story and reading books makes student not interested in studying history. In this case, we need a different approach to makes student in fifth grade more interested to learn it. One of alternative learning media that can be applied to fifth graders is the application of Padri War. In this application, Padri War is described in 3D animation video and there are many of trivial questions in it to test user ability. The result of the application testing conducted to five teacher respondents concludes this interactive application could be the best alternative learning method for fifth grade elementary school student today. The conclusion reflects on the assessment indicators of 80% material aspect, 72.5 % general aspect, 78,9% quality display, presentation of the material to 75%, and 84% of user interaction. On the student respondents, the visual design aspect in the Padri War learning is worth 79.3%. Overall, presentation study material in the form of 3D animation video would certainly increase the interest of elementary students in learning history. Diponegoro University 2017-07-01 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/9073 TEKNIK; Vol 38, No 1 (2017): (Juli 2017) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1769 2012-02-10T07:57:25Z teknik:ART

2460-9919 0852-1697 dc OPTIMASI PROSES POLIMERISASI MINYAK KULIT JAMBU METE (CNSL, CASHEW NUT SHELL LIQUID) DENGAN FORMALDEHID Buchori, Luqman CNSL; coating; formaldehyde; phenol; resin Jambu mete represents the crop which is a lot of its benefit. From various benefit of jambu mete, there is onepart of which not yet been exploited in an optimal that is husk. Whereas in its husk is contain oil so-calledCashew Nut Shell Liquid (CNSL) about 32-36%. This oil can be used as natural source phenol and alternativelysubstitution phenol from petroleum. This phenol is reacted by formaldehyde will form the phenol formaldehyderesin. Besides containing natural phenol, CNSL also contain the other bunch like karboksilat bunch, alkylbunch and alkenes bunch. This bunch will influence process of forming of phenol formaldehyde resin as aconsequence have an effect on characteristic and quality of resin so that require to be searched the optimumcondition in making of phenol formaldehyde resin. Objective of this research is to look for the optimumcondition in making of phenol formaldehyde resin of novolac type and also know the influence of comparison ofreactant and operating temperature for to resin yielded. Dependent variables in this research are reactorvolume (500 ml) with the volume bases 250 ml, catalyst acid HCl, mixing speed (200 rpm), operating time (90minute), pH (2) and operating pressure (1 atm). Independent variables are CNSL/formaldehyde ratio andoperating temperature. Perceived parameter is free rate formaldehyde. Method is used to design and processdata is RSM (Response Surface Methodology) method constructively the Static program. Result of this researchindicates that the most effect on variable is ratio CNSL/formaldehyde. Optimum condition are obtained at F/Cratio of 0.65-0.85 and temperature of 75-850C with the conversion of 0.55. The biggest rate resin obtained atF/C ratio 0.75/1 and temperature 80oC. This resin is very jell and have best sticky and also drug after runningdry. This novolac resin is applicated as furniture coating. Coating yielded have well sticky with the auburncolor. Diponegoro University 2012-02-02 14:46:02 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1769 TEKNIK; Volume 31, Nomor 2, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/36461 2021-08-29T17:46:58Z teknik:ART

"210826 2021 eng " 2460-9919 0852-1697 dc The Effect of Heat Treatment on Mechanical Properties of J4 Series Stainless Steel Metals Priyotomo, Gadang Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia Astawa, I Nyoman Gede Putrayasa Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia Rokhmanto, Fendy Pusat Penelitian Metalurgi dan Material, Lembaga Ilmu Pengetahuan Indonesia tensile test; hardness test; toughness; austenitic stainless steel; elongation Logam stainless steel (SS) seri J4 merupakan baja paduan austenitik krom dan mangan yang mempunyai kekuatan dan ketahanan korosi yang cukup baik. Namun umumnya, logam SS austenitik mengalami proses sensitasi saat terjadi pemanasan logam yang menurunkan sifat mekanik logam. Investigasi pengaruh sifat mekanik SS seri J4 terhadap variasi temperatur logam  dilakukan menggunakan uji tarik dan uji kekerasan mikro Vickers. Proses pemanasan logam dilakukan pada rentang suhu antara 600oC-1050oC. Penurunan nilai kekuatan tarik, kekuatan luluh, dan kekerasan yang disertai kenaikan ketangguhan dan elongasi terjadi seiring dengan kenaikan temperatur logam hingga 1050oC. Ini dimungkinkan akibat transformasi α’-martensite menjadi fasa austenit seiring dengan peningkatan temperatur pemanasan. Disisi lain, Penurunan nilai ketangguhan, kekuatan luluh dan elongasi terjadi pada kisaran temperatur pemanasan 700oC dimana ini mengindikasikan proses sensitasi paduan stainless steel J4 terjadi. Proses sensitasi logam SS akan berhubungan dengan kerentanan korosi retak tegang stainless steel. Diponegoro University 2021-08-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/36461 TEKNIK; Vol. 42, No. 2 (2021): August 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4815 2013-05-06T03:39:32Z teknik:ART

"130402 2013 eng " 2460-9919 0852-1697 dc STUDI PALEOSEISMOLOGI AKIBAT BENCANA GEMPA BUMI DI ZONA SESAR KALIGARANG (KGFZ) DI SEMARANG Fahrudin, Fahrudin Array Earthquake in the past can study with paleoseismology. Kaligarang fault zone will record the event of earthquake and result the sediment. The metode of research is detail field mapping and field excavation. Evidence of paleoseismology in the filed, we find the sand boil and carbon materials. We find two location of sand boil near with reverse faults. Sand boil to precipitate at unit B Kalibeng Formation. Phase tectonic to cause earthquake occure at late Miocene – Early Pliocene. Diponegoro University 2012-08-08 13:06:31 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/4815 TEKNIK; Volume 34, Nomor 1, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/60019 2025-04-17T01:00:52Z teknik:ART

"241230 2024 eng " 2460-9919 0852-1697 dc Design of a Glass Bottom Catamaran as a Tourist Attraction on Aceh's Banyak Island Chrismianto, Deddy Department of Naval Architecture, Faculty of Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Firdhaus, Ahmad Department of Naval Architecture, Faculty of Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Al Muhshi, Hassan Department of Naval Architecture, Faculty of Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Kiryanto, Kiryanto Department of Naval Architecture, Faculty of Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 ship design; glass bottom catamaran; ship resistance; ship stability; ship seakeeping Aceh's Banyak Island Due to its large water areas and fascinating islands that retain the grandeur of its sea and beaches, Singkil has risen as a new star in the world of tourism. Nonetheless, traditional fishing boats remain the principal mode of transportation for visitors in the region. The Glass Bottom Catamaran has been launched as a novel and attractive approach to admire the natural beauty of the seas around Banyak Island to capitalize on Indonesia's maritime tourist potential. The design process for this vessel involves basic linear regression calculations, the formulation of the ship's lines plan, the design of the vessel's General Arrangement, and the creation of a 3D model utilizing software. Stability calculations follow IMO standards, resistance calculations follow the Slender Body approach, and motion analysis follows Nordfork 1987 norms. As a result, the vessel's primary dimensions are as follows: LOA = 20.25 m, B = 7.04 m, B1 = 1.8 m, H = 2.4 m, T = 1.55 m, Vs = 17 knots, and a total passenger capacity of 54 people. In this investigation, the resistance value is 42.3 kN, concerning its ability to transport 60 tons at 17 knots. The stability study fulfils IMO guidelines, while the motion analysis meets Nordfork 1987 norms Diponegoro University 2024-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/60019 TEKNIK; Vol 45, No 3 (2024): December 2024 eng https://ejournal.undip.ac.id/index.php/teknik/article/download/60019/193325 https://ejournal.undip.ac.id/index.php/teknik/article/download/60019/193326 Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/15680 2020-04-17T09:36:44Z teknik:ART

"181231 2018 eng " 2460-9919 0852-1697 dc Lowering the NYM 2x1.5mm2 Cable Installation Temperature By Adjusting the Bend Angle Manfaluthy, Mauludi Department of Electrical Engineering, Jakarta High School of Technology Syukur, Muhammad Department of Electrical Engineering, Jakarta High School of Technology Supriyadi, Adi Department of Electrical Engineering, Jakarta High School of Technology NYM 2x1.5mm2; bend angle; cable flow; cable isolation One of the major causes on high temperature of the cable wires are erroneous bent position. Apparently at certain circumstances such as home or factory, cable installation must not be applied in upright assemble. There is a considerable that the cable installation must be applied in bent position. It was found that imprudent cable bending installation more likely to cause higher temperature to the cable. Considering controversy surrounding higher heat may occur to smaller and taper bending angle cable when it is electrified, it was designed an innovative solution to demote the temperature of NYM 2 x 1,5mm2 cable installation by regulating the cable bent angle. In this research, NYM 2 x 1.5mm2 cable were used as insulation resistance test by flowing it with various electric current as well as 5A, 10A, 17A, 18A and 19A. Cable bending angle were tested at 30o, 60o, 90o, 120o , and behind-bent wires. The test equipment was Omicron CPC 100 which has the capabilities of driving the output voltage up to 2kV AC with electrical currents output  up to 800A and 400A DC. The results were significant to the cable with mild bending angle that reduces the amount of temperature which stopped isolation from burning and prevented conductive wire from melting where taper bending cable angle with (300) isolation were likely to be more flammable. Diponegoro University 2018-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/15680 TEKNIK; Vol 39, No. 2 (2018): Desember 2018 eng Copyright (c) 2019 Teknik

oai:ojs.ejournal.undip.ac.id:article/1891 2012-02-24T10:20:44Z teknik:ART

2460-9919 0852-1697 dc ANALISA TEKNIS DAN EKONOMIS PENGGUNAAN COREMAT UNTUK KONSTRUKSI FRP (FIBERGLASS REINFORCED PLASTIC) SANDWICH PADA BADAN KAPAL Manik, Parlindungan Sasmito Hadi, Eko FRP, Coremat, Single Skin, Sandwich. Planning of ship construction is make its having good effectivity value and efficiency. Composite as materialalternative to changes of steel feedstock and wood has many applied named FRP (fiberglass reinforcedplastics) single skin. The weakness of this FRP was heavy construction and requires many production time.Therefore, will be checked comparison between single skin with sandwich constructions for shell.In this research, the way for making composite is hand lay up method with three various thickness of skinthere are : t, t/2, and t/4. To know strength comparison from the various skin of sandwich with single skin,must be test, consist of tensile test.. The result is analyzed then compared by BKI (Biro Klasifikasi Indonesia)rules for the fiberglass ship.Based on the result, indicates that optimization skin thickness of sandwich construction applies Corematwhich tensile strength it is equivalent with Single Skin at 2/3t and usage of Sandwich construction causes23,12 % lighter. In economic analyze, advantage from low weight is compensation of addition 23,12 % DWT.Material cost for Sandwich about 11,35% bigger than Single Skin construction. Diponegoro University 2012-02-15 10:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1891 TEKNIK; Volume 30, Nomor 3, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/42660 2025-07-07T19:35:10Z teknik:ART

"220531 2022 eng " 2460-9919 0852-1697 dc Aplikasi Metode DRASTIC untuk Analisis Kerentanan Air Tanah terhadap Pencemaran di Kabupaten Tanah Laut, Kabupaten Banjar, dan Kota Banjarbaru, Provinsi Kalimantan Selatan Putranto, Thomas Triadi Departemen Teknik Geologi, Universitas Diponegoro Budihardjo, Mochamad Arief Departemen Teknik Lingkungan, Universitas Diponegoro Sarminingsih, Anik Departemen Teknik Lingkungan, Universitas Diponegoro vulnerability; groundwater; DRASTIC; Banjarbaru; contamination In 2017-2019, the Tanah Laut Regency, Banjar Regency, Banjarbaru City population was relatively high and continued to increase every year. The increase in the population reaches 1.39% to 2.92%. Along with population growth, the human need for clean water also increases, especially from groundwater. The study aims to assess the vulnerability of groundwater to contamination. The method used for the analysis of groundwater vulnerability to contamination is the DRASTIC method. It refers to seven parameters, namely groundwater depth (D), net recharge (R), aquifer media (A), soil layer (S), topography (T), impact to vadose zone (I) and hydraulic conductivity (C) by using geospatial analysis to calculate the DRASTIC Index/DI. From the results of geospatial analysis, there are three zones of groundwater vulnerability to contamination based on DI values, namely low vulnerability (95-106), medium vulnerability (106-146), and high vulnerability (146-186). The distribution of high zones dominates in the research area around of 75, 8%. The DRASTIC method requires a lot of data to provide an accurate analysis of groundwater vulnerability zone maps. This method has excellent accuracy and more effective in producing a map of the groundwater vulnerability zones to contamination. Diponegoro University 2022-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/42660 TEKNIK; Vol. 43, No. 1 (2022): May 2022 eng Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/6717 2015-01-31T23:39:00Z teknik:ART

"141230 2014 eng " 2460-9919 0852-1697 dc Pengaruh Activity Support terhadap Kualitas Visual Koridor Jalan K.H. Agus Salim Semarang Hasanah, Iswatun Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang, Setioko, Bambang Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang, Setyowati, Erni Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang, Array Koridor Jalan K.H. Agus Salim merupakan koridor komersial yang cukup ramai yang berada di Wilayah Kecamatan Semarang Tengah di Kota Semarang. Pada koridor jalan ini terdapat beberapa bangunan yang menjadi magnet pemicu aktivitas-aktivitas yang bermunculan atau disebut activity support di sepanjang jalan ini. Sebagian ruang di koridor Jalan K.H. Agus Salim Semarang dipenuhi oleh activity support berupa pedagang kaki lima dan beberapa pangkalan becak. Ibaratnya sebuah generator, Jalan K.H. Agus Salim menjadi akses termudah bagi perkembangan aktivitas tersebut. Dengan demikian diduga activity support yang berada di sepanjang koridor Jalan K.H. Agus Salim ini berpengaruh pada kualitas visualnya. Untuk mengetahui pengaruh tersebut, maka penelitian ini menggunakan metode kuantitatif rasionalistik. Metode pengumpulan data berupa studi literatur, observasi lapangan, wawancara, dan kuisioner. Metode analisis data yang digunakan berupa analisis statistik dengan uji regresi menggunakan program SPSS 21.0 for Windows. Hasil dari penelitian ini menunjukkan adanya pengaruh antara activity support terhadap kualitas visual koridor jalan. [Influence of Activity Support towards Visual Quality of KH. Agus Salim Semarang Road Corridor] Road corridor of K.H. Agus Salim is a quite crowded commercial corridor which is located in the Regional District of Central Semarang City. On this road corridor, there are several buildings that make magnets trigger for emerging activities or also known as activity support along this road. The majority space on the road corridor is fullfilled with activity support in the form of street vendors and rickshaw bases. It is like a generator, road K.H. Agus Salim become the easiest access to the development of the activity. Thus, it is supposed that activity support along the road corridor of KH Agus Salim effect on the visual quality. To determine the effects, this research used quantitative rationalistic methods. Methods of data collection are literature study, field observations, interview and questionnaires. Method of data analysis using statistical analysis by regression test using program SPSS for Windows 21.0. The results of this study found out there were some influences of the activity support to the visual quality of the road corridor. Copyright (c) 2014 by Fakultas Teknin, Undip. All right reserved. Diponegoro University 2015-01-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/6717 TEKNIK; Vol 35, No 2 (2014): (Desember 2014) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/76484 2025-11-17T01:02:24Z teknik:ART

"251117 2025 eng " 2460-9919 0852-1697 dc Rochadiani, Theresia Herlina Department of Informatics, Pradita University, Scientia Business Park, Jl. Gading Serpong Boulevard No.1 Tower 1, Curug Sangereng, Kec. Kelapa Dua, Kabupaten Tangerang, Banten 15810 http://orcid.org/0009-0007-3466-6977 Santoso, Handri Wasito, Ito Sucipto, Nadya Rudie Anggraini, Astria Febrian Panna, Ariya The safety of toddlers at home is paramount for parents, but constant monitoring is difficult due to busy schedules. The limitations of camera-based monitoring solutions, namely privacy concerns and heavy processing, drive the need to develop monitoring systems that utilize sound recognition. This research aims to develop Smart Guardian, an Artificial Intelligence of Things (AIoT) system that can detect risky or emergency sound patterns from children and send real-time notifications to parents' mobile phones. The applied method includes the development of a YAMNet-based speech recognition AI model, installed on a Raspberry Pi as an edge computing device, with a microphone functioning to record environmental sounds. This system is designed to identify crucial environmental sounds such as breaking glass, explosions, screaming, water, fire alarms, smoke detectors, in addition to infant crying. The results of prototype trials under laboratory conditions indicate that the fire alarm and smoke detector classes have extremely high confidence levels (around 0.95 and 0.83). However, the glass class showed varying confidence levels (around 0.5), while cough, explosion, water, and screaming had lower confidence levels (median 0.15, 0.13, 0.25, and 0.4, respectively). The conclusion from these findings is that Smart Guardian has great potential as a privacy-focused toddler monitoring solution, although further optimization is needed to improve the speech recognition performance of events with low and varying confidence levels.   Diponegoro University 2025-11-17 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/76484 TEKNIK; Vol 46, No 3 (2025): Juli 2025 ind Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1936 2012-08-08T06:08:29Z teknik:ART

2460-9919 0852-1697 dc TESTING OF CONCRETE PAVING BLOCKS THE BS EN 1338:2003 BRITISH AND EUROPEAN STANDARD CODE Purwanto, Purwanto Arni Priastiwi, Yulita paving blocks, compression testing, bending Concrete paving blocks are the choice for road and urban road’s surfacing. Besides their ease inapplication, they also provide design freedom by coloring off the material.Of major importance is their compression strength. The Indonesian SNI categorizes strength to theirpurposes i.e., for parking areas, pedestrian walking areas and heavy industrial estates.According to the SNI 03 – 0691 -1989 and British Standard BS 6717:1986 the strength of a paving blockis determined by the maximum carrying capacity under distributed load. The blocks are placed under acompression apparatus, and the compression strength at failure is recorded.As being observed in the field paving block’s failure pattern differs as to the failure under distributedloading. The paving’s failure mode is distinguished by a bending failure plain at the smallest crosssection.The BS EN 1338 code proposes a different approach. This paper will discuss the methods being used inthe BS EN 1338 code, and evaluates the effectiveness of Indonesian standards to date. Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1936 TEKNIK; Volume 29, Nomor 2, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/48979 2022-09-19T00:37:33Z teknik:EI

"220830 2022 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi back-matter TEKNIK Volume 43 Nomor 2 Tahun 2022 yang memuat petunjuk penulisan dan pengiriman artikel TEKNIK. Diponegoro University 2022-07-04 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/48979 TEKNIK; Vol. 43, No. 2 (2022): August 2022 ind Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/32515 2021-05-06T06:54:02Z teknik:ART

"201230 2020 eng " 2460-9919 0852-1697 dc Analysis of the Effect of Biodiesel B20 and B100 on the Degradation of Viscosity and Total Base Number of Lubricating Oil in Diesel Engines with Long-Term Operation Using ASTM D2896 and ASTM D445-06 Methods Sentanuhady, Jayan Department of Mechanical and Industrial Engineering, Universitas Gadjah Mada Majid, Akmal Irfan Department of Mechanical and Industrial Engineering, Universitas Gadjah Mada Prashida, W. Department of Mechanical and Industrial Engineering, Universitas Gadjah Mada Saputro, W. Department of Mechanical and Industrial Engineering, Universitas Gadjah Mada Gunawan, N. P. Department of Mechanical and Industrial Engineering, Universitas Gadjah Mada Raditya, T. Y. Department of Mechanical and Industrial Engineering, Universitas Gadjah Mada Muflikhun, Muhammad Akhsin Department of Mechanical and Industrial Engineering, Universitas Gadjah Mada biodiesel; lubricant; kinematic viscosity; total base number; B100; B20 Berdasarkan karakteristiknya biodiesel memiliki densitas, viskositas, serta tingkat keasaman yang lebih tinggi dibandingkan bahan bakar solar, sehingga memiliki kekurangan dari sisi pelumas terutama dalam jangka panjang. Dampaknya berupa penurunan nilai viskositas kinematik pelumas, penurunan total base number hingga berdampak pada penurunan kinerja mesin. Penelitian ini bertujuan untuk mengetahui karakteristik pelumas yang dihasilkan dari penggunaan biodiesel (B20 dan B100) terhadap nilai viskositas kinematik pelumas dan Total Base Number (TBN). Metode pengujian menggunakan standard ASTM D2896-15 dan ASTM D445-06. Penelitian ini menggunakan dua unit mesin diesel Kubota RD 65 DI-NB dengan volume silinder masing-masing mesin 376 cc. Mesin dikopel dengan generator untuk menyalakan lampu halogen dengan total daya 4000 W. Kedua mesin menggunakan bahan bakar berbeda, mesin pertama diisi dengan bahan bakar B20 dan mesin kedua diisi dengan bahan bakar B100 dari minyak sawit. Kecepatan putar mesin dijaga konstan pada 2200 rpm dan mesin dioperasikan selama 300 jam tanpa henti, dan setiap kelipatan 100 jam dilakukan pengambilan sampel pelumas. Berdasarkan hasil penelitian kualitas pelumas berbahan bakar B100 tidak lebih baik dibandingkan pelumas berbahan bakar B20. Pelumas berbahan bakar B100 memiliki nilai viskositas kinematik pada suhu 40 °C dan 100 °C serta nilai TBN yang lebih rendah dibandingkan pelumas berbahan bakar B20. Diponegoro University 2020-11-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/32515 TEKNIK; Vol 41, No. 3 (2020): December 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1700 2012-02-10T06:41:42Z teknik:ART

2460-9919 0852-1697 dc MEKANISME DEFORMASI, PERGERAKAN (SENSE SHEAR) DAN PERKEMBANGAN STRUKTUR DALAM PROSES DEFORMASI DUCTILE Fahrudin, Fahrudin The deformation mechanisme in ductile – transition zone show microfracture cataclasis activities,intracrystalline deformations, twinning, kinking, solid-sate diffusion creep, recovery and recrystallisation. Thatactivities to extend the sense shear indication. Sense shear can see i.e porfiroclast, mica fish, porfiroblast, veins,strain shadow, strain fringe and boudin. Commonly sense shear indications to get the form of ellipsoid geometry.That geometry experience to development the structure along progressive deformations process. Thedevelopment of inclusion and fabric also occur at that process. Diponegoro University 2012-02-02 14:48:56 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1700 TEKNIK; Volume 32, Nomor 2, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/31372 2020-07-05T22:50:43Z teknik:EI

"200531 2020 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi front-matter jurnal Teknik Volume 41 Nomor 1 Tahun 2020, yaitu meliputi halaman sampul, fokus dan ruang lingkup Teknik, informasi indeksasi, susunan tim penyunting dan mitra bebestari, kata pengantar editor dan daftar isi Diponegoro University 2020-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/31372 TEKNIK; Vol 41, No. 1 (2020): May 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2113 2012-02-23T04:04:23Z teknik:ART

2460-9919 0852-1697 dc DISTRIBUSI TEGANGAN PADA PERCABANGAN PIPA 90O AKIBAT TEKANAN INTERNAL MENGGUNAKAN MEH Suprihanto, Agus Satrijo, Djoeli Basuki Wibowo, Dwi piping system, stress distribution, finite element method Piping system is very important in many industries. Ones of crucial in design of piping system are todetermine the stress distribution around the branch. In this research, the distributed stress over 90o branchpiping system was evaluated with finite element method. Five models piping 90o branch which differentratio of diameter of pipe have been developed. The load applied on the models is internal pressure.The results indicate that around the branch there is stress distribution. The maximum stress is located atcenter of the branch but decrease significantly in the distance 30mm-45mm from it. Beyond the distance75mm from center, for diameter ratio 1, the model gives good agreement with experiment data Diponegoro University 2012-02-10 11:25:01 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2113 TEKNIK; Volume 28, Nomor 2, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/56996 2024-01-16T21:44:16Z teknik:ART

"231208 2023 eng " 2460-9919 0852-1697 dc Hydrogeochemical Analysis and Heavy Metals in Groundwater Using the WQI and HPI Methods for Sanitation Hygiene Needs in East Belitung Regency Putri, Maya Aiko Salsabila Department of Geological Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Putranto, Thomas Triadi Department of Geological Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Santi, Narulita Department of Geological Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 East Belitung; hydrogeochemistry; groundwater quality; heavy metal Kelapa Kampit is one of the tin-producing districts in East Belitung, which is composed of the Kelapa Kampit Formation. This mining activity affects water quality, which, of course, is also influenced by geological formations. This study aims to analyze the hydrogeochemistry and heavy metals in shallow groundwater in Kelapa Kampit District using water quality indexes in the form of water quality index and heavy metal pollution index methods. Hydrogeochemical test results showed a pH value of water 4 – 6.77 in the acidic category, a DHL value of 20 – 145 μS/cm, and a TDS value of 14 – 111 mg/L. From the visualization of chemical data, groundwater has various facies. The results of the Stiff Diagram show that water contains predominant calcium, magnesium, sulfate, and bicarbonate ions. The Gibbs diagram results show that the water has not been contaminated. The results of heavy metal testing also showed that the values of Fe2+, Mn2+, Pb2+, Zn2+, and Cu2+ were classified as low, and Al3+ was quite high. The results of water quality testing using the water quality index showed that the research area had excellent water quality, and the results of the heavy metal testing using the HPI method showed a low heavy metal contamination value. Based on hydrogeochemical and heavy metal analysis of shallow groundwater, Kelapa Kampit District has good groundwater quality for sanitation hygiene purposes. Diponegoro University 2023-12-08 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/56996 TEKNIK; Vol. 44, No. 3 (2023): December 2023 eng Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/8411 2020-04-17T09:31:46Z teknik:ART

"161231 2016 eng " 2460-9919 0852-1697 dc Penentuan Skala Prioritas Penanganan Jalan Kabupaten di Kabupaten Kudus Dengan Metode Analytical Hierarchy Process Irawan, Hafit Program Magister Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk No. 5-7, Semarang, Ismiyati, Ismiyati Program Magister Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk No. 5-7, Semarang, Pudjianto, Bambang Program Magister Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk No. 5-7, Semarang, Skala Prioritas; Penanganan Jalan; Analytical Hierarchy Process; Priority Scale; Handling Road; Analytical Hierarchy Process Pelaksanaan penanganan jalan di Kabupaten Kudus banyak terjadi ketidakseimbangan paket-paket pekerjaan penanganan jalan seperti banyaknya jalan yang belum mendapat penanganan baik pemeliharaan maupun peningkatan. Selama ini yang digunakan dalam penentuan skala prioritas penanganan jalan didasarkan pada ketersediaan anggaran dan nilai manfaat finansial jalan saja. Tujuan penelitian ini adalah memperoleh urutan prioritas penanganan jalan di Kabupaten Kudus, secara tepat dengan melibatkan pihak-pihak yang terkait. Penelitian ini menggunakan metode AHP dengan 5 (lima) kriteria yang dipakai untuk menentukan prioritas penanganan jalan, yaitu kerusakan jalan, mobilitas, volume lalu lintas, tingkat aksesibilitas, dan pengembangan wilayah. Berdasarkan analisa AHP diperoleh tingkat kepentingan bobot masing-masing kriteria untuk menentukan prioritas penanganan jalan. Hasil penelitian menunjukkan bahwa kriteria kerusakan jalan memperoleh bobot tertinggi, yaitu 45,06% kemudian kriteria mobilitas 20,62%, kriteria volume lalu lintas 14,53%, kriteria tingkat aksesibilitas 12,78%, dan kriteria pengembangan wilayah 7,01%. Kesimpulan dari penelitian ini bahwa perlu adanya kriteria-kriteria sebagai tolok ukur untuk menentukan dalam prioritas penanganan jalan agar pengalokasian anggaran tepat sasaran.Saran dari penelitian ini dalam menentukan prioritas penanganan jalan di Kabupaten Kudus sebaiknya mempertimbangkan beberapa kriteria sebagai dasar prioritas penanganan jalan.  [Title: The Determination of The scale Priorities for Handling in Kudus Use Analytical Hierarchy Process Method]. The implementation of the road handling in Kudus, in fact is found many imbalances packets roads handling jobs like many roads yet had a good handling maintenance and enhancement. So far in setting priorities scale was based on an assessment of the availability of the budget and the value of the financial benefits. The purpose of this study is to obtain an assessment of the priority order in Kudus appropriately involving related parties. This study used AHP with 5 (five) criteria that were used to determine the priority of the road, which is damage to roads, mobility, traffic volume, accessibility, and regional development. Based on AHP analysis, we can found the level of importance weight of each criterion for determining priority road handling. The results showed that the damage criteria to obtain the highest weight, i.e. 45.06% and 20.62% mobility criteria, the criteria of traffic volume 14.53%, 12.78% level of accessibility criteria, and the criteria for regional development 7.01%. Therefore, we need criteria as a benchmark to determine the priority of the road so that the budget allocation is well targeted. The suggestion of this research in deciding the priority of roads handling in Kudus should consider some criteria as the basic priorities for the handling of the road. Diponegoro University 2016-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/8411 TEKNIK; Vol 37, No 2 (2016): (Desember 2016) eng Copyright (c) 2016 Teknik

oai:ojs.ejournal.undip.ac.id:article/1758 2012-02-15T04:03:20Z teknik:ART

2460-9919 0852-1697 dc DESAIN KAPAL IKAN DENGAN BENTUK LAMBUNG CATAMARAN YANG MENGGUNAKAN SISTEM PENGGERAK LAYAR AN MESIN UNTUK MUATAN IKAN HIDUP Manik, Parlindungan Sasmito Hadi, Eko fishing vessed, catamaran, hull form, lively fish The Application Of Catamaran Hullform For The Fishing Vessel accorded to the leakage of the monohullform. The existence and the using of the lively fish hold could help the fisherman to decrease theoperational cost for about 11,8% to keep the fishes. Therefore the application of sail objected to reduce thebiggest cost operation component that is the fuel consumption. Catamaranhullform design for lively fish holdtook one hullform which has the best performance. The performance aspects in this case are the hydrostatic,ship resistance, stability and seakeeping.The research about catamaran fishing vessel design for lively fishes using sail and machine as the ship moveris expected to give the information about the hullform that has a better performance than the commonlyhullform and it could be an alternative to improve the fishing vessel hullform into the modern one.Accorded to the calculation result and analysis are gained the result that showed at the velocity of 12 knotsfrom some length dimension variations of fish hold for the catamaran fishing vessel with lively fish hold,variation of length of 2,0 meters could reduced the biggest ship’s resistance for about 3,99% between theother modification hullform and the ship’s resistance of standard hullform. Otherwise, by the stability aspectof any variation condition, fish hold length dimension variation at 2,0 meters had a better stability thananother fish hold length dimension and catamaran fishing vessel which used the commonly fish hold. Theinstallation of sail at the fish hold length dimension at 2,0 meters could reduce the power operation for about48,42% better than fishing vessel that used the commonly fish hold. Diponegoro University 2012-02-02 14:41:15 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1758 TEKNIK; Volume 31, Nomor 1, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/31296 2021-06-03T02:06:59Z teknik:ART

"210505 2021 eng " 2460-9919 0852-1697 dc Analysis of Halal and Marketing Strategy for Broiler Chickens' Supply Chain during Covid-19 : A Case Study in Yogyakarta, Indonesia Asih, Hayati Mukti Faculty of Industrial Technology, Universitas Ahmad Dahlan Firmansyah, Fahri Faculty of Industrial Technology, Universitas Ahmad Dahlan Faishal, Muhammad Faculty of Manufacturing Engineering, Universiti Teknikal Malaysia Melaka COVID-19; food supply chain; halal; SEM; sustainability Corona virus has a destructive impact on the world's economy, especially in Indonesia, making a large-scale social restriction policy (SRL). Many restaurants, hotels, schools, and colleges in Yogyakarta are closed. Consumers, mostly students from outside Yogyakarta, have to return to their hometowns. This case impacts the decline in chicken prices to cover losses due to excess supply and decreasing demand. This research aims to analyze the decline in chicken prices, halal products' and the concept of marketing strategies impact on the chicken supply chain during the Covid-19 outbreak in Yogyakarta. This research used SEM to obtain accurate analysis and descriptive results to overview phenomena from society under study. The analysis using SEM shows that halal factors do not significantly affect consumer decisions in buying chicken. However, it was found that there was an increase in consumers in online shopping, which could create new strategies in marketing strategies. The application of online marketing strategies will improve consumers' services so that it is expected to be a novel value that can increase consumer buying interest during the Covid-19 outbreak in Yogyakarta, Indonesia. Diponegoro University 2021-05-03 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/31296 TEKNIK; Vol. 42, No. 1 (2021): May 2021 eng Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4386 2013-01-22T02:50:02Z teknik:ART

"121015 2012 eng " 2460-9919 0852-1697 dc LINGKUNGAN KAMPUNG BERKELANJUTAN DAN POTENSI MASYARAKAT DI KAMPUNG KANALSARI, SEMARANG, INDONESIA. (Studi Kasus: Kampung Kanalsari – Semarang) Sari, Widiastuti Nany, Yuliastuti Array Low-income communities tend to live in the urban village areas (defined as ’kampong’), which presence is prevalent in several major cities in Indonesia. Kampong is a neighborhood or residential area of low-income people with poor physical conditions. Kampong is a traditional neighborhood which is marked by the features of close-knit relationships (Herbasuki, 1984). The legitimate land ownership motivates the people to build and develop houses and neighborhoods, in accordance with the economic ability of the family. Housing infrastructure development that is generally taking place in the Indonesian kampongs are commonly carried out by the kampongs’ residents together with the municipal government. This has been the common practice in order to sustain and prevail the existence of the kampongs. This paper is the result of a study on the effects of infrastructure development that are viewed from the perspectives of physical conditions of the kampong as well as the socio-economic conditions of the communities in Kampong Kanalsari, Semarang, Indonesia. With the use of a mixed-methods approach coupled with a quantitative analysis, the outcomes of study are as follows: 1) residents of kampongs evidently have high motivation to prioritize on the development of infrastructure; 2) there is a high level of social quality, which proves that the character of the people who have harmonious society have and still survive in Kampung Kanalsari; 3) the development and improvement of village infrastructure that are conducted independently and by non-government institutions positively impacts the physical conditions of the housing environments, social and economic conditions of the community. The influence of social conditions occupies the highest level because the development is carried out independently, based on the aspirations, interests and needs of the community, which ultimately provide benefits and advantages for the kampong’s residents. This influence would directly affects the community as it increases their motivation to build and improve the housing conditions and environmental sustainability in order to ensure security and liveability of the residential area. Diponegoro University 2012-07-12 10:30:29 https://ejournal.undip.ac.id/index.php/teknik/article/view/4386 TEKNIK; Volume 33, Nomor 2, Tahun 2012 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/64329 2025-04-17T01:00:27Z teknik:ART

"240830 2024 eng " 2460-9919 0852-1697 dc Sipahutar, Muhammad Agus Hanafi Universitas Diponegoro Zaman, Badrus Indriyantho, Bobby Rio https://orcid.org/0000-0003-2323-120X Jalan Tol Baleno (Bayung Lencir – Tempino) merupakan salah satu ruas Tol Trans Sumatera dengan panjang 39 Km yang menjadi kelanjutan dari Tol Betung Pelambang. Adhi-Waskita-Jaya Konstruksi, KSO merupakan kontraktor pelaksana yang dipilih untuk melaksanakan konstruksi Jalan Tol Baleno Seksi 1, dengan total panjang jalan tol 10.525 km. Masa kontrak pelaksanaan Tol Baleno seksi 1 dipercepat yang semula 595 hari menjadi 400 hari. Lokasi main road STA. 116+475 – 116+625 merupakan lokasi interchange dengan jenis pekerjaan yang banyak dan saling berkaitan serta memiliki kondisi tanah lunak. Desain yang paling optimal terhadap biaya dan waktu diperlukan pada lokasi tersebut, sehingga tidak terjadi keterlambatan dalam masa kontrak yang lebih singkat. Penelitian ini membahas analisis desain pada lokasi main road STA. 116+475 – 116+625 yang terdiri dari analisis kondisi tanah, analisis permodelan dan pembebanan, dan analisis terhadap biaya, waktu, dan metode pelaksanaan untuk mendapatkan desain yang paling optimal. Berdasarkan analisis yang dilakukan diperoleh hasil bahwa desain yang paling optimal untuk diterapkan pada lokasi main road STA. 116+475 – 116+625 adalah menggunakan pile slab. Desain pile slab memiliki biaya pelaksanaan yang lebih rendah dibandingkan dengan alternatif desain yang lain dan bisa lebih cepat dari segi metode dan waktu. Diponegoro University 2024-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/64329 TEKNIK; Vol 45, No 2 (2024): August 2024 ind Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/16524 2020-04-17T09:36:05Z teknik:ART

"180731 2018 eng " 2460-9919 0852-1697 dc PEMETAAN ANCAMAN BANJIR KOTA SEMARANG MENGGUNAKAN FUZZY LOGIC DAN SIG Nugraha, Arief Laila Departemen Teknik Geodesi Fakultas Teknik, Universitas Diponegoro Flood Hazard, GIS, Fuzzy Logic, Semarang City One of the efforts to prevent and reduce the impact of the flood disaster is by the availability of information packaged into a digital map of the flood-prone areas, which can be used for planning control or early countermeasures. Geographic Information System (GIS) is an appropriate method in mapping flood-prone areas for large area coverage with a relatively short time. By integrating GIS technology and precise mathematical methods, it can produce spatial analysis with good precision and accuracy. Various methods to get the value of weighting and classification one of them by doing the method of decision making using Fuzzy Logic method. With the use of Fuzzy Logic method can strengthen the hypothesis that will be achieved in mapping the identification of disaster threats in a region in this case the flood Hazard of Semarang City. Fuzzy Logic and GIS method gives more valid result than using disaster catalog method with validity value equal to 54,84% from 31 field validation point with spread of flood threat in high class dominated in Genuk subdistrict.  Diponegoro University 2018-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/16524 TEKNIK; Vol 39, No 1 (2018): (July 2018) eng Copyright (c) 2018 Teknik

oai:ojs.ejournal.undip.ac.id:article/1869 2012-02-15T03:26:54Z teknik:ART

2460-9919 0852-1697 dc KAJIAN KELAYAKAN KEGIATAN PERTAMBANGAN BAHAN GALIAN GOLONGAN C DI KECAMATAN CEPOGO KABUPATEN BOYOLALI Najib, Najib Junaedi, Junaedi Mining, Sand and Gravel, improper mining, Good Mining Practice Sand and Gravel mining activity in Cepogo District come out pro and contra in that society. This researchaims to figure out the impact of mining from physical aspect. Parameters used in this research such ascondition and mining activity, hydrology, erosion, land exchanged, infrastructure condition, mass wasting,land use and reclamation effort. From those parameters are counted mining properness in those locations.According with data analysis, mining activity in eight villages in Cepogo District has improper mining(e.g. Gedangan, Sumbung, Paras, Mliwis, Sukabumi, Cepogo and Cabean Kunthi) and in one location isvery improper mining (Wonodoyo). This condition due to mining didn’t follow good mining practice(GMP). Diponegoro University 2012-02-02 14:36:47 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1869 TEKNIK; Volume 30, Nomor 2, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/36351 2021-12-16T21:29:52Z teknik:ART

"211217 2021 eng " 2460-9919 0852-1697 dc Fathurrohman, Muhammad Eryantono, Anugrah Erick Rumbara, Robby Debriand Perkembangan teknologi berbasis internet yang pesat menyebabkan terjadinya perubahan pada sektor industri yang dikenal dengan Revolusi Industri 4.0. Industri manufaktur pengecoran merupakan salah satu sektor industri yang harus beradaptasi dengan perkembangan industri 4.0 agar dapat bersaing dalam meningkatkan kualitas produk coran. Beberapa parameter yang mempengaruhi kualitas produk coran adalah temperatur saat penuangan (pouring) dan laju penuangan. Penentuan temperatur penuangan harus memperhitungkan faktor kehilangan panas yang disebabkan oleh waktu pemindahan logam cair dan kondisi lingkungan sekitar. Penentuan temperatur tuang yang kurang tepat dapat menyebabkan terbentuknya porositas (rongga) pada produk hasil pengecoran. Karena pentingnya penentuan temperatur tersebut, maka pada penelitian ini dibangun sistem monitoring berbasis internet of things (IoT) untuk memantau temperatur logam cair saat proses pengecoran secara real-time. Sistem yang dibangun terdiri atas tiga bagian, yaitu: sensor temperatur, gateway dan server. Perangkat pyrometer digunakan untuk mengukur temperatur logam cair dan mengirimkannya ke gateway. Perangkat gateway kemudian mengirimkan data tersebut ke server. Pengguna dapat mengamati temperatur logam cair secara real-time melalui website. Hasil penelitian menunjukkan bahwa dengan sistem monitoring berbasis IoT ini, dapat diperoleh database pengukuran temperatur logam cair yang optimal. Tingkat keakuratan pengukuran data temperatur tersebut mencapai 99,5%. Diponegoro University 2021-12-17 04:29:52 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/36351 TEKNIK; Vol 42, No. 3 (2021): December 2021 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/36351/109036 Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/42147 2023-10-12T21:21:38Z teknik:ART

"230830 2023 eng " 2460-9919 0852-1697 dc Analysis of Casting Defects, Tensile Strength, and Hardness of AlSi Alloy Castings from Sand Casting Method with Bangkalan Local Clay Binder Variations Muhtarom, Imam Department of Mechanical Engineering, Yogyakarta State University Rahdiyanta, Dwi Department of Mechanical Engineering, Yogyakarta State University https://sinta.ristekbrin.go.id/authors/detail?id=6023562&view=overview metal casting; AlSi; Bangkalan local clay; casting defects; hardness; tensile strength Penelitian ini bertujuan untuk menganalisis cacat pengecoran, kekuatan tarik, dan kekerasan logam paduan AlSi hasil pengecoran metode sand casting dengan pengikat lempung lokal Bangkalan. Penelitian ini merupakan jenis penelitian eksperimental dengan menggunakan metode one-shot case study di mana sekelompok sampel diberi sebuah perlakuan selanjutnya hasil penelitian dianalisis dan dijabarkan secara deskriptif. Penelitian ini menggunakan tiga variabel bebas berupa pengikat lempung lokal Bangkalan dengan variasi persentase 6%, 9%, 12% dan tiga variabel terikat berupa cacat pengecoran, kekuatan tarik, dan kekerasan logam. Berdasarkan hasil penelitian diketahui cacat pengecoran terendah terdapat pada permukaan logam AlSi dengan variasi persentase pengikat 12% dengan jumlah 76 cacat lubang dan 80 cacat struktur butir. Sedangkan nilai kekuatan tarik tertinggi terdapat pada logam AlSi dengan variasi pengikat 12% dengan nilai sebesar 11,188 kgf/mm². Adapun nilai kekerasan tertinggi juga terdapat pada logam AlSi dengan variasi pengikat 12% dengan nilai sebesar 131,9 HV. Kesimpulan penelitian ini adalah penggunaan pengikat lempung lokal Bangkalan sejumlah 12% merupakan variasi pengikat cetakan pasir terbaik dibandingkan variasi pengikat 6% dan 9%. Diponegoro University 2023-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/42147 TEKNIK; Vol. 44, No. 2 (2023): August 2023 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/42147/129819 Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/70130 2025-07-07T19:30:43Z teknik:ART

"250331 2025 eng " 2460-9919 0852-1697 dc Huboyo, Haryono Setiyo Deptemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro https://orcid.org/0000-0001-8353-1365 Ramadan, Bimastyaji Surya Undari, Melinda Tri Fauziyah, Fitria Umi Syafei, Wahyul Amien Jassey, Babucarr Air pollution in Grobogan Regency, especially particulate parameters, annually shows an average value of 69% of ambient air quality standards with an average concentration of PM2.5 reaching 38 μg/m³, primarily due to industrial activities, transportation, and the burning of fossil fuels. In the Sugihmanik Village Tofu Industrial Centre, Grobogan Regency, there are 30 home-based tofu SMEs that use rice husks as fuel for boiler furnaces, which produce pollutants such as SO₂, NO₂, CO₂, CO, PM₂.₅, PM₁₀, and TSP. The largest tofu factory in Sugihmanik Village uses 400 kg of rice husks daily. The chimney design, which does not comply with the technical standards of Kepdal No. 205 of 1996, further increases the risk of air pollution. Therefore, the design of an air pollution control device and a chimney redesign are required to mitigate these negative effects. After calculating the emission concentrations and comparing them with PermenLH No. 7 of 2007, only total particle parameter close to the quality standard of 350 mg/m3 with a particulate loading emitted from the furnace of 232 mg/s. By using a cyclone as an emission control device, there is a particulate removal efficiency of 53.05%. With the implementation of air pollution control devices, the ambient air concentration of particulates, previously a peak concentration of around 300 µg/m3, can be reduced to around 68.8 µg/m3. Diponegoro University 2025-03-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/70130 TEKNIK; Vol 46, No 2 (2025) April 2025 ind Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/22087 2020-04-17T09:37:54Z teknik:ART

"191111 2019 eng " 2460-9919 0852-1697 dc Adaptive Neuro-Fuzzy Inference System (ANFIS) for Controlling Level and Pressure on Deaerator Sumardi, Sumardi Department of Electrical Engineering, Faculty of Engineering, Universitas Diponegoro Riyadi, Munawar A Department of Electrical Engineering, Faculty of Engineering, Universitas Diponegoro Aprivirly, Lintang Nurlitha Department of Electrical Engineering, Faculty of Engineering, Universitas Diponegoro Deaerator; level; pressure; ANFIS DDeaerator is one of the most widely used plants in the chemical industry and marine steam power plant. Deaerator is used to eliminate oxygen in water that enters the boiler to avoid corrosion of the boiler pipes. Control of pressure and level in deaerator needs to be done to keep the process well. The purpose of the research is to design a control system that can keep pressure and level of deaerator on the set point un the presence of changes in the load and input systems. Deaerator should be controlled to keep its safety and efficiency. Adaptive Neuro-Fuzzy Inference System (ANFIS) is a combination of fuzzy logic control and neural network. Design of ANFIS requires an input-output data set obtained from a PI controller that is considered as a "teacher" for ANFIS for the learning process. The results of the simulation show that the system using ANFIS controller for controlling pressure and level deaerator in normal set point can produce very small maximum overshoot that is equal to 0% and small IAE value that is 7.898 for pressure, and 157.7 for level compared to PI Diponegoro University 2019-11-11 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/22087 TEKNIK; Vol 40, No. 2 (2019): Agustus 2019 eng Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/8161 2015-01-31T15:20:56Z teknik:EI

"141230 2014 eng " 2460-9919 0852-1697 dc Back-matter & Author Guidelines Tudjono, Sri Diponegoro University 2015-01-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/8161 TEKNIK; Vol 35, No 2 (2014): (Desember 2014) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1686 2012-02-10T07:42:07Z teknik:ART

2460-9919 0852-1697 dc KAJIAN PEMANFAATAN POTENSI SUMBER DAYA AIR TERPADU ( STUDI KASUS MATA AIR INGAS (COKRO), KEC. COKRO TULUNG KABUPATEN KLATEN – JAWA TENGAH) Sriyana, Sriyana Water resource potential, Integratedly , Ingas (Cokro) Potential exploitation of Ingas (Cokro) water resource is currently less than optimal, there are still manywasted water flows and there is still no coordination in planning. The objective of this research is to reviewwater resource potential integratedly, by measuring the spring discharge in real terms, analyzing the utilizationof water source and water balance. The method used in this thesis is by measuring the discharge using currentmeter, analyzing water requirements for plants using Penman method, and analyzing data with the help ofMicrosoft Exel. It is resulted that the total potential of Ingas (Cokro) water resource is 1297 l/dt, utilized fordrinking water (PDAM Surakarta) at 400 l/dt, drinking water for Cokro Village at 4 l/dt, and the remainder isused for irrigation and moving a turbine with 50 Watt electric power. Water demand for irrigation is 995 l/dt,fullfilled from Ingas (Cokro) source discharge at 593 l/dt plus surface water discharge as a result frommeasurment of pulsur river (Plosowareng weir) at 696 l/dt, from the total water resource potential of 1289 l/dt.Water balance of Ingas (Cokro) water resource has already balanced or optimal, while residual discharge of294 l/dt is obtained at measurement point (Plosowareng weir) Diponegoro University 2012-02-02 14:47:08 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1686 TEKNIK; Volume 32, Nomor 1, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/26125 2020-07-10T16:19:18Z teknik:ART

"200531 2020 eng " 2460-9919 0852-1697 dc Sealing Performance Layered Metal Gasket Based on the Simulation Method Karohika, I Made Gatot Program Studi Teknik Mesin, Universitas Udayana http://sinta2.ristekdikti.go.id/authors/detail?id=6075358&view=overview http://orcid.org/0000-0002-6733-6444 Haruyama, Shigeyuki Graduate School of Innovation and Technology Management, Yamaguchi University Antara, I Nyoman Gde Program Studi Teknik Mesin, Universitas Udayana Budiarsa, I Nyoman Program Studi Teknik Mesin, Universitas Udayana Penindra, I Made Dwi Budiana Program Studi Teknik Mesin, Universitas Udayana contact width, contact stress, layers, gaskets, corrugated, simulation Studies for corrugated metal gaskets are still ongoing to improve its performance. This is considered to be a single gasket with SUS304 material when contact with flanges that have greater surface roughness, reduced contact width and plastic deformed contact surfaces are incomplete and cannot fill the surface roughness of flanged flanges. The use of softer material than the base material as a surface covering material is used to improve the performance of the gasket. In this study, therefore the effect of modulus of elasticity ratio and thickness ratio on contact width and contact stress, 25A three-layer metal gasket was investigated using Finite Element Analysis. The results showed that the material with tangent modulus, Ehal = Eal / 150 had the highest slope for contact width. While the contact width of the plastic mode gasket is higher than the elastic mode gasket. Diponegoro University 2020-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/26125 TEKNIK; Vol 41, No. 1 (2020): May 2020 eng Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2047 2012-02-21T07:33:30Z teknik:ART

2460-9919 0852-1697 dc RISK ANALYSIS STUDY OF NOx, and SOx FROM TRANSPORTATION (CASE STUDY: MAIN STREETS OF D.I. JOGJAKARTA) Arief Budihardjo, Mochamad NO2, SO2, risk analyze, Jogjakarta The air pollution problems have been progressively set attention to the world especially industrialcountries recently. These problems not only give affect at health like emphysema, bronchitis, and otherinhalation disease but also make plants and properties destruction causes very big loss. This research isconcerned with the risk level which is accepted by people who reside in roadside because most of airpollutants come from transportation facilities such as motor vehicle. The limitation of the research is airpollutants exposure such like NOx, and SOx which enter the body through respiration. This risk analysisresearch is broken down into four step as follow; hazard identification showing NO2, and SO2concentration in 15 sampling locations where the highest value of NO2 is 56,5 μg / m3 and SO2 is 28,87μg/m3. According to DIY Governor Regulation No. 153 Year 2002 about the value of ambient air qualitystandard, quality standard of NO2 is 400 μg / m3, and SO2 is 900 μg / m3. It can be concluded thatconcentration of NO2 and SO2 in 2005 within all sampling locations is still under of quality standard. Thestep of exposure assessment involves the exposed population including pedicab worker, park worker, andcloister merchant. From calculation, the intake range of NO2 enters the body is 0,0025-0,0075 mg/kg.dayand SO2 is 0,0008-0,0038 mg/kg.day. Third step is dose-response assessment to find out what will be facedby people if exposure of pollutants occurs in a certain dose. The last step is risk characterization, theresult of research is that risk value / Hazard Index (HI) less than 1 that still acceptable. It can besummarized that the ambient air quality of Jogjakarta especially NO2 and SO2 gas do not too adverse tohealth. Diponegoro University 2012-02-10 11:26:10 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2047 TEKNIK; Volume 28, Nomor 1, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/49075 2023-06-25T22:39:35Z teknik:ART

"230531 2023 eng " 2460-9919 0852-1697 dc Mirsa, Rinaldi Department of Architecture, Faculty of Engineering, Universitas Malikussaleh, Lancang Garam, Lhokseumawe , Indonesia 24355. Muhammad, Muhammad A, Hendra Rosane, Wiwi Anola Rumah gadang merupakan rumah tradisional yang terdapat di Sumatera Barat. Rumah Gadang merupakan rumah tinggal bagi kaum di Minangkabau yang harus dilestarikan. Melestarikan rumah tradisional merupakan suatu hal yang harus dilakukan oleh masyarakat. Rumah gadang yang perlu dilestarikan diantaranya berada di Nagari Tuo Pariangan Kabupaten Tanah Datar. Perubahan sistem kehidupan masyarakat sebernarnya dapat mengancam rumah gadang, tetapi wilayah ini merupakan kampung yang masih menggunakan rumah gadang sebagai tempat tinggal. Rumah gadang merupakan perwujudan dalam bentuk rumah tradisional, sikap hidup yang dimanifestasikan secara tangible dan intangible. Penelitian ini bertujuan untuk mengetahui manifestasi tangible dan intangible pada rumah gadang. Manifestasi memiliki bentuk atau wujud, tangible berwujud nyata dan intangible yang tidak berwujud. Metode penelitian menggunakan deskriptif kualitatif dengan survei, wawancara, dan dokumentasi langsung ke lapangan. Hasil penelitian menunjukkan manifestasi tangible (karakteristik fisik) pada rumah gadang memiliki keseragaman dan perbedaan pada bentuk fisik dan bahan terlihat pada bentuk atap, dinding, pintu, tangga, jendela dan ornamen atau ragam hias pada rumah gadang. Spasial ruang pada rumah gadang memiliki pengaturan dan komposisi ruang yang sederhana. Spasial ruang pada rumah gadang terdiri dari lanjar tepi, lanjar tengah, lanjar dalam, lanjar bilik, dan dapur. Adapun manifestasi intangible yang terungkap dalam perwujudan unsur arsitektural adalah pada bentuk fisik dan bahan dari rumah gadang berupa unsur filosofi bentuk atap, dinding, perletakan pintu, jendela, perletakan tangga, dan bentuk ornamen dan ragam hias pada rumah gadang. Spasial ruang pada rumah gadang memiliki makna tertentu dalam penentuan letak ruang, jumlah kamar dan luas rumah Diponegoro University 2023-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/49075 TEKNIK; Vol. 44, No. 1 (2023): May 2023 ind Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/44895 2023-10-12T21:21:38Z teknik:ART

"230830 2023 eng " 2460-9919 0852-1697 dc Detection of Actinic Keratosis Skin Cancer Using Gray Level Co-occurrence Matrix Texture Extraction and Color Extraction With Support Vector Machine Classification Putra, Leonardus Sandy Ade Department of Electrical Engineering, Faculty of Engineering, Universitas Tanjungpura Gunawan, Vincentius Abdi Department of Electrical Engineering, Faculty of Engineering, University of Palangka Raya Saragih, Agus Sehatman Department of Electrical Engineering, Faculty of Engineering, University of Palangka Raya actinic keratosis; skin cancer; segmentation; gray level co-occurrence matrix; support vector machine Nowadays, humans tend to carry out activities during the day, both indoors and outdoors. Activities carried out outdoors cause human skin to often receive direct exposure to sunlight, which contains ultraviolet (UV) rays. Direct exposure to UV rays on the skin will harm the skin's health, which is the covering of the human body. Harmful effects on the skin usually include the skin becoming dark and dull, burns, and even causes cancer. One of the skin cancers that may appear on human skin is Actinic Keratosis (AK) cancer. AK cancer is a type of cancer that is classified as benign and can be cured with medical help. However, if this cancer is not caught early, it can become Squamous Cell Carcinoma (SCC), a type of malignant cancer. This research aims to design a system for identifying AK cancer types using color and texture feature extraction. RGB color feature extraction is obtained from image color segmentation and RGB values. The Gray Level Co-occurrence Matrix (GLCM) method is used to determine the texture of the skin cancer. Identification is carried out by a classification process using a Support Vector Machine (SVM), which can recognize the type of AK cancer. This research uses three classification methods: classification with color extraction, classification with texture extraction, and classification with color and texture extraction. Research shows that the highest level of accuracy in cancer recognition reaches 96% by combining color and texture extraction results as classification determinants. So, the system designed has succeeded in recognizing the type of AK cancer early on.. Diponegoro University 2023-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/44895 TEKNIK; Vol. 44, No. 2 (2023): August 2023 eng https://ejournal.undip.ac.id/index.php/teknik/article/download/44895/139598 Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1746 2012-02-15T04:03:20Z teknik:ART

2460-9919 0852-1697 dc UJI KETELITIAN HASIL KOREKSI GEOMETRIK CITRA SATELIT ALOS PRISM DENGAN HITUNG PERATAAN KUADRAT TERKECIL METODE PARAMETER Sudarsono, Bambang Julzarika, Atriyon Geometrical correction, 3D Mode of Alos Prism, Adjustment Remote sensing is a branch science of Geodesy Engineering that using satellite applications for survey andmapping. One of the natural resources satellite that be used for mapping is Alos Satellite.It is own of Japan, italso could be used in 3D Application, especially Prism and Palsar. There are some methods for making 3Dapplication that are stereo mode, interferometry, and DSM2DEM. Geometric correction of this satellite is veryimportant so it needs a study for its statistical test. Alos satellite have 3D shape as Digital Terrain Model(DSM), not Digital Terrain Model (DTM), Digitallen HöheModellen (DHM), Digital Geoid Model (DGM) orDigital Elevation Model (DEM). Alos satellite that be used are Alos Prism where it has spatial resolution in 2.5meter. The reference system of 3D model that are produced by Alos satellite image still as surface for z axis, forx axis and y axis has been closed to 2D reference system in some certain datum and system of map projection.So, this research will give result of its accuracy and precision and it could uses for the reference system.For its statistical test, it needs a method for checking its accuracy. It is least square adjustment in parametermethods. In case, it needs a research for observate the accuracy and precision of Alos satellite data using aleast square adjustment of parameter methods. Data from Alos satellite will be compared with data from Globalpositioning System (GPS) of geodetic. The results of this research will be used as reference for next research toinvent a way for changing DSM from satellite, radar, air video and interferometry-automatically. Diponegoro University 2012-02-02 14:41:15 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1746 TEKNIK; Volume 31, Nomor 1, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/33883 2021-05-06T06:54:02Z teknik:ART

"201201 2020 eng " 2460-9919 0852-1697 dc Analysis of Particulates and SO2 Removal from Coal Combustion Emissions Using Cyclone and Wet Scrubber With Textile Wastewater Feed Huboyo, Haryono S. Environmental Engineering Department Faculty of Engineering, Diponegoro University Sudarno, Sudarno Environmental Engineering Department Faculty of Engineering, Diponegoro University air pollution; coal; control; emission; efficiency; industry Reuse of wastewater in the industry is mostly accomplished for watering plants. In a closed cycle, however, industrial wastewater can be returned through treatment to save water usage. This study aims to analyze textile wastewater's ability to be used as scrubbing liquid in the SO2 gas and particulate removal from coal combustion using a packed wet scrubber. Usually, the textile industry uses boiler fueled by coal and discharging base/alkaline wastewater. The method is carried out experimentally using a prototype device using a combination of cyclone and scrubber, with a source of coal combustion gas emissions. We did experiments using textile wastewater four times and two times using clean water as a control. We monitor the SO2, particulate emission in the gas stream, and pH, sulfate levels, and TSS levels in collected wastewater according to SNI. SO2 gas and particulates from coal combustion will be absorbed by the scrubber's wastewater spray so that SO2 will dissolve into sulfate, particulate matter into TSS. The study results using textile wastewater showed the removal efficiency of particulates on cyclone by 34-78%.  The removal efficiency of SO2 on wet scrubber was only 24.7%. There was an increase in TSS levels after passing through the scrubber by 46%. The rise in TSS and sulfate concentrations in the wastewater indicates the absorption of SO2 and particulates into wastewater. Based on this result, we can use textile wastewater for controlling the emission of SO2 and particulate from coal combustion by feeding it for the scrubber. However, the efficiency of this process is not optimal. Diponegoro University 2020-11-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/33883 TEKNIK; Vol 41, No. 3 (2020): December 2020 eng Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/3792 2012-07-18T09:10:43Z teknik:ART

"120409 2012 eng " 2460-9919 0852-1697 dc PROSES PRODUKSI KATALIS ZEOLIT X DAN UJI AKTIFITAS DALAM PROSES PENUKARAN ION KALSIUM Widayat, Widayat Sadikky DP, A. Anggraeni, H. Array Zeolie is a material that used in chemical process industry. Zeolite commonly used as catalyst, adsorbent adnion exchanger.Zeolite can be obtained from natural resources and synthetic in industry. The type of zeolitethatused as ion exchanger zeolite X. Zeolite X can produced hy uding hydrogel process and clay process. Thisreasearch was study influencing of temperature and ratio sodium hydroxide (NaOH) to water glass in zeolite Xpreparation. Crystallity of zeolite X was analyzed with X-ray diffraction (XRD) and the activity was used asion exchanger. Response variabel in this research is weight of zeolite X and the capability as ion exchanger.Ion exchange test that used for exchange of calsium. Calsium ion was analizyed by using complexometrymethod. The results of this research shown that zeolit X was obtained in temperature 100oC and rationweight of sodium hidroxide (NaOH) to water glass 1:2. The zeolite X can be used as ion exchanger especiallyfor calsium ion. Diponegoro University 2012-07-12 10:29:15 https://ejournal.undip.ac.id/index.php/teknik/article/view/3792 TEKNIK; Volume 33, Nomor 1, Tahun 2012 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/61985 2025-04-24T18:11:04Z teknik:ART

"240613 2024 eng " 2460-9919 0852-1697 dc Febriani, Irawati Department of Civil Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Sriyana, Ignatius Suharyanto, Suharyanto Bendungan Logung merupakan bendungan multipurpose yang salah satu fungsinya sebagai pengendali banjir. Mengingat bahwa Bendungan Logung telah beroperasi selama 5 (lima) tahun sekaligus menanggapi perubahan pola curah hujan dan tata guna lahan, serta mengantisipasi kemungkinan kegagalan bendungan akibat overtopping, maka perlu dilakukan kajian penelusuran banjir di waduk menggunakan data hidrologi dan tutupan lahan terbaru. Penelitian ini bertujuan untuk mengevaluasi kemampuan Bendungan Logung dalam mereduksi banjir. Model penelusuran banjir dalam penelitian ini menggunakan software HEC-HMS dengan metode Soil Conservation Services-Curve Number (SCS-CN). Berdasarkan analisis yang dilakukan terdapat peningkatan curah hujan rencana apabila dibandingkan dengan studi perencanaan tahun 2015 serta adanya perubahan tata guna lahan di DTA Waduk Logung yang menyebabkan nilai debit banjir rencana lebih besar dibandingkan dengan studi perencanaan. Bendungan Logung dapat mereduksi debit banjir untuk masing- masing kala ulang sebesar: Q2 = 42,88%; Q5 = 38,38%; Q10 = 35,02%; Q25 = 31,53%; Q50 = 29,42%; Q100 = 27,50%; Q1000 = 20,72%; dan QPMF = 16,43%. Hasil debit puncak QPMF sebesar 946,5 m3/detik yang berada pada elevasi +93,5, di mana elevasi tersebut berada di atas muka air banjir QPMF perencanaan yakni +92,85. Oleh karena itu tidak terjadi overtopping karena puncak bendungan berada pada elevasi +94. Diponegoro University 2024-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/61985 TEKNIK; Vol. 45, No. 1 (2024): May 2024 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/61985/200137 Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/13403 2020-04-17T09:34:33Z teknik:ART

"171229 2017 eng " 2460-9919 0852-1697 dc Penurunan Kadar Kromium Heksavalen (Cr6+) Dalam Limbah Batik Menggunakan Limbah Udang (Kitosan) Natalina, N. Program Studi Teknik Lingkungan, Universitas Malahayati Firdaus, Hidayati Program Studi Teknik Lingkungan, Universitas Malahayati aliran kontinu; kitosan; kromium heksavalen; limbah cair batik Industri batik menghasilkan limbah cair pada proses pewarnaan dan pelorodan. Limbah cair yang mengandung logam berat berbahaya ini seringkali dibuang ke badan sungai secara langsung, sehingga mencemari air sungai. Upaya pengolahan limbah cair industri batik perlu dilakukan untuk mengurangi kandungan logam berat di dalamnya. Kitosan merupakan salah satu senyawa yang dapat digunakan untuk menurunkan kadar logam kromium heksavalen (Cr6+) dalam limbah cair batik. Penelitian ini bertujuan untuk mengetahui apakah kitosan dari limbah udang windu mampu menurunkan kadar kromium heksavalen (Cr6+) dalam limbah cair batik. Penelitian dilakukan pada skala laboratorium dengan menggunakan aliran kontinu. Kitosan dari limbah udang windu diproduksi melalui proses deproteinasi, demineralisasi, depigmentasi dan deasetiasi. Larutan K2Cr2O7 digunakan sebagai larutan pembanding dan kitosan murni digunakan sebagai kitosan pembanding. Berat kitosan yang digunakan dalam reaktor sebesar 2,8 gram. Laju alir di set-up sebesar 15 ml/menit. Pengambilan sampel dilakukan pada menit ke 0, 10, 20, 30, dan 40. Analisa dilakukan terhadap kandungan kromium hesavalen. Hasil penelitian menunjukkan bahwa efisiensi penurunan kromium heksavalen adalah 52,858% dan 71,782%, masing-masing untuk kitosan dari limbah udang windu dan kitosan murni Diponegoro University 2017-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/13403 TEKNIK; Vol 38, No 2 (2017): (Desember 2017) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1826 2012-02-15T03:18:19Z teknik:ART

2460-9919 0852-1697 dc PRODUCTION OF INDUSTRY SALT WITH SEDIMENTATION – MICROFILTRATION PROCESS: OPTIMAZATION OF TEMPERATURE AND CONCENTRATION BY USING SURFACE RESPONSE METHODOLOGY Widayat, Widayat surface response methodology; sedimentation; microfiltration; stearic sodium; inversion The salt of sodium chloride commonly used consumption in house , so as a raw material in industry. Thequality of salt depends on sodium chloride concentration. The objective of this research is obtained ofoptimum condition in production of salt industry by using sedimentation and microfiltration process. Theoptimization used surface response methodology and analysis by Statistica 6 software. The responseperceived is NaCl concentration in product. The experiments do by mixing stearic acid with NaOH solutionto product stearic sodium. Then, the solution mixed with sea water, so the white solid will be emerge, thereare stearic calcium and stearic magnesium. And so filtrate evaporated until to obtain salt. TheMathematical model for reduction of Ca2+ and Mg2+ are1 222 221 1 Y = 93,3185 + 1,0967 X + 0,1909 X +1,0682 X - 0,2333 X - 0,3376 X X , with maximum conversion is94,46% at temperature 82,42oC and stearic sodium concentration 14,16%(v/v). The maximum of NaClconcentration is 96,19% at temperature 81,54oC and stearic sodium concetration 13,11 %(v/v). Themathematical model for NaCl production is1 222 221 1 Y = 92,7596 - 0,3443 X - 3,3706 X + 2,9553 X - 0,9562 X - 1,9272 X X . The results of NaCl not yetfulfilled with SNI industry salt. The NaCl concetration in SNI is 98,5%. So, this process is nt aplicable forproductiob salt industry in Indonesia. Diponegoro University 2012-02-02 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1826 TEKNIK; Volume 30, Nomor 1, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/40824 2021-08-29T17:46:58Z teknik:EI

"210826 2021 eng " 2460-9919 0852-1697 dc Back Matter TEKNIK, Editor in Chief Departemen Teknik Elektro, Fakultas Teknik, Universitas Diponegoro TEKNIK Artikel editorial ini berisi back-matter TEKNIK Volume 42 Nomor 2 Tahun 2021 yang memuat petunjuk penulisan dan pengiriman artikel TEKNIK. Diponegoro University 2021-08-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/40824 TEKNIK; Vol. 42, No. 2 (2021): August 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/5637 2017-07-19T17:16:59Z teknik:ART

"130913 2013 eng " 2460-9919 0852-1697 dc PERALIHAN MATA PENCAHARIAN SEBAGAI BENTUK ADAPTASI (Studi Kasus: Desa Batu Belubang, Bangka) Adiatma, Ira Bambang, Azis Nur Purnaweni, Hartuti Array Bangka island as a whole has undergone a significant change related thereto. Group of fishermen coastal communities are the most vulnerable to changing weather and coastal environment. In the village of Batu Belubang, frequent extreme weather phenomena of the cyclone and the rapid change of weather, had forced the population to adapt to climate change. The livelihoods of fishermen who rely heavily on natural conditions cause the dependence on weather patterns and ocean activities. This research uses qualitative analysis with the positivistic approach. The method of data collection is done with the interview focused and observational field to see the real conditions and survey agencies to obtain preliminary data regarding the level of climate change that occurred in the region. The analysis is done by assessing the linkages/relationship of the destructive effects of climate change on livelihoods of fishermen. From the analysis carried out, the main reason for the occurrence of the transition is economic livelihood. This transition is triggered by vulnerability due to climate change and the existence of externalities, namely a deterioration of Tin prices and the pepper in the international market in 1990 which was then backed up by policy changes after regional autonomy in 2001. The welfare obtained from short-term floating mines have huge consequences for the coastal environmental damage that would lead to a condition in which a new vulnerability. Key words : the transition of livelihood, adaptation, fisherman Diponegoro University 2013-10-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/5637 TEKNIK; Volume 34, Nomor 2, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/68004 2025-07-07T19:30:43Z teknik:ART

"250331 2025 eng " 2460-9919 0852-1697 dc Slope Stability Analysis of the Bener Dam Cofferdam Using PLAXIS Application for Main Dam Construction Safety Halim, Ferdiansyah Imran Department of Civil Engineering, Faculty of Engineering, Diponegoro Universitas , Tembalang, 50275, Semarang, Central Java, Indonesia Wardani, Sri Prabandiyani R Department of Civil Engineering, Faculty of Engineering, Diponegoro Universitas , Tembalang, 50275, Semarang, Central Java, Indonesia Sadono, Kresno Wikan Department of Civil Engineering, Faculty of Engineering, Diponegoro Universitas , Tembalang, 50275, Semarang, Central Java, Indonesia Stability; Cofferdam; Safety Factor; PLAXIS; Finite Element Method Slope stability is one of the methods used to determine the safety factor of a hydraulic structure, such as a cofferdam. A cofferdam functions to retain water and divert it into a diversion channel, which may be in the form of a conduit or tunnel. Assessing the safety factor of a cofferdam is crucial to ensuring the smooth progress of dam body embankment work. While many studies have been conducted on dam body slope stability, research on cofferdam slope stability remains limited. This study aims to analyze the slope stability of the Bener Dam cofferdam using the finite element method with the PLAXIS application to ensure that the main dam construction remains unaffected. The data used for slope stability analysis were obtained from the Final Report of Bener Dam and several literature sources. The slope stability modeling was evaluated under three conditions: after construction (empty water level), flood water level, and rapid drawdown. The results indicate that the safety factor values for all three conditions exceed the required threshold, with values of 1.369 for after construction, 1.824 for normal water level, and 1.215 for flood water level. These results confirm that the main dam construction is not affected by the stability of the cofferdam. Diponegoro University 2025-03-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/68004 TEKNIK; Vol 46, No 2 (2025) April 2025 eng Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/22758 2020-04-17T09:38:49Z teknik:ART

"190531 2019 eng " 2460-9919 0852-1697 dc Application of UV Mapping Technique and Painting Texture in Making 3D Animation Movie "Bujang Buta (Blind Youth)" Setiawan, M Iqbal Trisnadoli, Anggy Nugroho, Erwin Setyo Animation 3D; folklore; Bujang Buta; UV Mapping Technique; Texture Painting Indonesia merupakan negara yang kaya akan cerita rakyat. Bujang Buta merupakan salah satu cerita rakyat yang berasal dari kota Kampar. Banyak dari masyarakat yang tidak mengetahui tentang adanya cerita rakyat secara detil. Pada penelitian ini mengangkat cerita rakyat Bujang Buta yang akan dikemas secara menarik dalam bentuk film animasi 3D. Di dalam film animasi 3D banyak teknik untuk membuatnya, salah satunya adalah teknik UV Mapping dan Texture Painting yang membuat film animasi 3D menjadi lebih berwarna. Pembuatan film animasi ini menggunakan aplikasi Blender 3D sebagai media utamanya. Berdasarkan hasil pengujian dan analisis, Film animasi 3D Cerita Rakyat Bujang Buta sudah diverifikasi dengan pakar LAMR (Lembaga Adat Melayu Riau). Teknik UV Mapping dan Texture Painting sudah berhasil diimplementasikan ke dalam pembuatan film animasi 3D Bujang Buta. Dan berdasarkan hasil kuesioner yang telah diberikan kepada 37 masyarakat umum dan 6 masyarakat yang mengikuti organisai terdapat 10 pesan moral yang ada di dalam film animasi 3D Bujang Buta. Diponegoro University 2019-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/22758 TEKNIK; Vol 40, No. 1 (2019): Mei 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1920 2012-02-24T11:23:19Z teknik:ART

2460-9919 0852-1697 dc KELEMBAGAAN IMPLEMENTASI PROGRAM KREDIT MIKRO PERUMAHAN DI KOTA SEMARANG Prananing Tyas, Wido Ruswanti, Endah institutional framework, microfinance institutions, housing microfinance Housing microfinance is the latest program launched by Kemenpera since 2006. The program is aimed tohelp the low-income household by giving subsidy for new home construction and renovation. During itsimplementation, microfinance institution as an implementer has some internal problems, such as humanresource, management, financial, trustment, accountability and limited links. Because of the problems, thisstudy is important to explore the institutional framework of the housing microfinance implementation inSemarang. The aim of the present study is to identify the institutional framework of the housingmicrofinance implementation in Semarang, not only by the government as a facilitator but also by themicrofinance institutions as an implementer and the inhabitants of this capital as a user. In this research,there are three focus discussions, including institution as an implementer of the housing microfinanceprogram, variables of the microfinance institutional framework, and the last, comparison study of thehousing microfinance implementation by the microfinance institutions in Semarang and comparisonbetween implementation in Semarang and the other developing countries. The study is utilizing qualitativeresearch method by describing the implementation of housing microfinance and exploring its institutionalframework to give some detail descriptions of the housing microfinance implementation in Semarang Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1920 TEKNIK; Volume 29, Nomor 1, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/37333 2022-09-19T00:37:33Z teknik:ART

"220713 2022 eng " 2460-9919 0852-1697 dc Heroza, Nadry Pratoto, Adjar Analisis eksergi pembangkit listrik yang memanfaatkan panas buang di PT. Semen Padang dilakukan untuk mengidentifikasi keandalan pembangkit baik secara keseluruhan sistem ataupun masing-masing komponen yang dapat digunakan sebagai landasan untuk pengoptimalan pemanfatan panas buang serta pengoptimalan pengoperasian pembangkit agar lebih efisien seiring bertambahnya umur pemakaian. Aliran eksergi dan efisiensi eksergi dihitung untuk setiap komponen yang kemudian digunakan untuk menghitung seberapa besar eksergi yang termusnahkan pada masing masing komponen. Perhitungan juga dilakukan terhadap sistem pada saat commissioning agar didapatkan seberapa besar perubahan efisiensi eksergi sejak sistem ini beroperasi. Komponen pembangkit ini meliputi SP boiler, AQC boiler, turbin, kondenser, Pompa kondensat, Flasher, Boiler feed pump dan economizer. AQC boiler adalah komponen yang memiliki nilai eksergi yang termusnahkan paling besar yaitu sebesar 4405.34 kW atau 32.98% dari total eksergi yang dimusnahkan dalam sistem secara keseluruhan Sedangkan pompa kondensat adalah komponen yang memiliki nilai eksergi yang termusnahkan paling kecil 18.94 kW (0.14%). Efisiensi sistem pada Januari 2012 adalah 62.60% dan mengalami penurunan di Desember 2019 menjadi 53.04% yang mana terjadi penurunan efisiensi eksergi sistem secara keseluruhan sebesar 9.56% dalam waktu 7 tahun operasi. Diponegoro University 2022-07-04 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/37333 TEKNIK; Vol. 43, No. 2 (2022): August 2022 ind Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/25327 2020-04-17T09:40:18Z teknik:ART

"191231 2019 eng " 2460-9919 0852-1697 dc Kartika, Ika Ashari, Andi Mulya Trenggono, Adhitya Lestari, Franciska Pramuji Erryani, Aprilia Paduan Mg-Zn-Ca dengan struktur berpori memiliki potensi sebagai implan mampu luruh yang dapat mengatasi persoalan dalam dunia medis. Tujuan studi ini adalah membuat paduan implan berpori Mg-0,5Ca-4Zn hasil proses metalurgi serbuk dengan variasi foaming agent CaCO3 dan temperature sintering. Struktur pori yang dihasilkan dalam paduan dikarakterisasi dengan menggunakan x-ray diffraction (XRD) dan scanning electron microscopy (SEM). Persentasi porositas dalam paduan dilakukan dengan uji archimedes sesuai ASTM B311-93. Hasil identifikasi senyawa dalam paduan dengan XRD menunjukkan adanya fasa Mg, MgO, MgZn, Mg2Ca dan fasa intermetalik Ca2Mg6Zn3. Semakin meningkatnya temperatur sintering dan penambahan CaCO3 dalam paduan meningkatkan pori yang terbentuk sehingga menurunkan densitas dan kekuatan tekan dari paduan Mg-0,5Ca-4Zn. Pengamatan dengan SEM menunjukkan ukuran pori terbesar yang terbentuk adalah sebesar 106,62 – 435,22 µm yang dihasilkan dalam paduan 85,5Mg-0,5Ca-4Zn-10CaCO3 pada temperatur sintering 650 °C. Diponegoro University 2019-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/25327 TEKNIK; Vol 40, No. 3 (2019): Desember 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1968 2012-02-24T11:16:25Z teknik:ART

2460-9919 0852-1697 dc PERANCANGAN MODEL PENDUGAAN EFEKTIVITAS WADUK RESAPAN DI KOTA BOGOR TERHADAP OPTIMALISASI AKUIFER AIRTANAH Broto, Sudaryo Susanto, Hadi reservoir dam, aquifer, groundwater flow Flooding is a crucial problem in Jakarta city and there were many ideas to solve that problem, such ascanals development, land use management, applying soil conservation technique, check dam building,injection well, reservoir dam until rain moving technique. Reservoir dam is chosen by many experts as asolution to solve about flooding in order to increase and accelerate the rate of percolation to groundwaterinto their aquifer. this research is preliminary investigation to calculate the effectively of reservoir damthat is consider with water balance and groundwater flow into reservoir dam. In this research is developedby tank model that combine with 2 D of groundwater flow direction based on groundwater level Diponegoro University 2012-02-02 14:39:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1968 TEKNIK; Volume 29, Nomor 3, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/49496 2023-06-25T22:39:35Z teknik:ART

"230531 2023 eng " 2460-9919 0852-1697 dc Rokhmanto, Fendy Research Center for Metallurgy National Research and Innovation Agency Panghihutan, Malau Daniel Putri, Ariani Pradhita Prayoga, Benidiktus Tulung Kartika, Ika Erryani, Aprilia Dwijaya, Made Subekti Senopati, Galih Setyawan, Albertus Deny Heri Sutowo, Cahya Paduan kobal banyak digunakan sebagai material implan orthopaedi karena faktor biokompatibilitas material, ketahanan korosi, sifat mekanis yang baik, dan juga sifat mampu bentuknya. Pada penelitian ini nilai kekerasan dimodifikasi melalui proses heat treatment. Proses heat treatment diharapkan dapat menurunkan nilai kekerasan paduan. Paduan Co-30Cr-5Mo-0.32C-0.23N hasil coran dihomogenisasi pada temperatur 1200 ºC selama 12 jam dalam atmosfer argon. Kemudian paduan di-hot roll dengan preheat selama 1 jam pada temperatur 1250 ºC. Lalu dilakukan proses solution treatment dengan variasi temperatur 1200, 1250, 1300 ºC, selama 30 menit dalam atmosfer argon kemudian di-quenching. Karakterisasi paduan dengan pengamatan metalografi, SEM dan kekerasan memakai metode Vickers. Berdasarkan analisis dapat disimpulkan bahwa nilai kekerasan turun dan morfologi presipitat berubah dari starlike-dense pada kondisi setelah roll menjadi starlike-stripes pada kondisi setelah solution treatment dengan temperatur 1250 ºC, serta jenis presipitat dari M23X6 pada kondisi as cast menjadi M7X3 pada kondisi setelah solution treatment. Demikian halnya dengan nilai kekerasan, turun hingga 392,5 HV pada kondisi solution treatment dengan temperatur 1250 ºC Diponegoro University 2023-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/49496 TEKNIK; Vol. 44, No. 1 (2023): May 2023 ind Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/9687 2015-12-09T05:21:40Z teknik:EI

"151210 2015 eng " 2460-9919 0852-1697 dc Backmatter Istadi, Istadi Teknik Diponegoro University 2015-12-09 12:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/9687 TEKNIK; Vol 36, No 2 (2015): (December 2015) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1737 2012-02-10T06:29:29Z teknik:ART

2460-9919 0852-1697 dc ANALISIS GAS TERLARUT PADA MINYAK ISOLASI TRANSFORMATOR TENAGA AKIBAT PEMBEBANAN DAN PENUAAN Hermawan, Hermawan Syakur, Abdul Iryanto, Irwan aging, insulation oil, DGA. The lifetime of transformers and its equipments are highly dependent on the quality of insulation system.Insulation is one important component in a transformer because generally, insulations used liquid and solidinsulation in accordance with its function as an insulating material and cooling media. At the time there usedtransformer oil aging and damage caused by several things such as impurities, water content, dissolved gases(Dissolved Gas Analysis-DGA), acidity and heating the oil. Transformers loading will cause a decrease in thequality of the transformers insulation system that resulted in the decreasing age of insulating oil.This paper explained the influence of aging on the rate of degradation of Dissolved Gases of power transformersinsulating oil. This research was conducted using sample data loading and maintenance of transformers byobtained directly with investigations into the transformers which is operating. There are three method todetermine quality of oil transformer i.e. Total Combustible Gases (TCG), Roger Ratio, Key Gas and DuvalTriangle Methods.Based on analysis result by using samples from a variety of loading conditions of the transformers with differentlevels we can conclude the quality and worthiness of insulation oil and the estimated the effective remaining lifeof transformers insulation system. Diponegoro University 2012-02-02 14:47:46 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1737 TEKNIK; Volume 32, Nomor 3, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/20265 2020-10-05T05:22:47Z teknik:ART

"200831 2020 eng " 2460-9919 0852-1697 dc Analisis Efektivitas Pengendalian Risiko Kecelakaan Kerja Pada Pekerja Proyek Konstruksi Menggunakan Metode Fine dan Fault Tree Analysis Ginting, Nopita Sari br Fakultas Teknik, Universitas Mercu Buana Kristiana, Retna Fakultas Teknik, Universitas Mercu Buana identifikasi bahaya; analisis risiko; efektivitas pengendalian risiko; fault tree analysis Semua proyek konstruksi pasti memiliki risiko. Salah satunya adalah risiko terjadinya kecelakaan. Masalah Keselamatan dan Kesehatan Kerja (K3) pada sektor konstruksi masih belum menjadi perhatian utama. Hal itu dapat dilihat dari angka kecelakaan kerja di sektor konstruksi adalah yang paling tinggi di antara bidang kerja lainnya. Berdasarkan Laporan Insiden HSE Project, terdapat tujuh insiden pada proyek Office Tower J-Box Jakarta Pusat, sehingga prinsip zero accident pada proyek tersebut tidak tercapai. Tujuan dari penelitian ini adalah untuk mengidentifikasi pekerjaan yang berisiko menimbulkan bahaya pada pekerja proyek, menilai tingkat risiko, menilai efektivitas pengendalian risiko, dan menentukan pengendalian risiko yang tepat pada proyek tersebut. Data yang digunakan dalam penelitian ini adalah data primer berupa kuesioner pada responden dan data sekunder berupa Laporan Mingguan K3, Laporan Bulanan K3, dan Laporan Data insiden. Penelitian ini menggunakan kombinasi metode Fine dan Fault Tree Analysis. SPSS V22 digunakan untuk menguji validitas data primer. Metode Fine digunakan untuk menghitung nilai risiko kecelakaan kerja. Metode Fault Tree Analysis dipakai untuk menganalisis nilai risiko sehingga diketahui penyebab dasar dari suatu kejadian yang berpotensi bahaya dan merekomendasikan tindakan spesifik yang dapat dilakukan kontraktor dalam meminimalisir bahaya tersebut. Analisis hasil penelitian menunjukkan bahwa nilai efektivitas risk control pada pekerja proyek konstruksi pembangunan Office Tower J-Box Jakarta berada pada tingkat risiko <20 atau acceptable. Tindakan spesifik yang dapat dilakukan oleh kontraktor untuk meminamilisir potensi bahaya yang ada adalah membuat metode kerja yang aman untuk setiap pekerjaan, melakukan tool box meeting sebelum memulai suatu pekerjaan, mengajukan ijin kerja K3 sebelum melakukan pekerjaan, menggunakan APD yang sesuai untuk setiap pekerjaan, pemasangan rambu-rambu K3 pada area pekerjaan  dan pengawasan oleh tim HSE. Diponegoro University 2020-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/20265 TEKNIK; Vol 41, No. 2 (2020): August 2020 ind Copyright (c) 2020 Teknik

oai:ojs.ejournal.undip.ac.id:article/20124 2020-03-17T01:24:36Z teknik:EI

"180731 2018 eng " 2460-9919 0852-1697 dc Teknik, Ketua Editor Jurnal Artikel editorial ini berisi front-matter jurnal Teknik Volume 39 Nomor 1 Tahun 2018, yaitu meliputi halaman sampul, fokus dan ruang lingkup Teknik, informasi indeksasi, susunan tim penyunting dan mitra bebestari, kata pengantar editor dan daftar isi. Diponegoro University 2018-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/20124 TEKNIK; Vol 39, No 1 (2018): (July 2018) ind Copyright (c) 2018 Teknik

oai:ojs.ejournal.undip.ac.id:article/59153 2025-04-24T18:11:04Z teknik:ART

"240613 2024 eng " 2460-9919 0852-1697 dc Baharudin, Irfan Master of Civil Engineering, Department of Civil Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia Sukamta, Sukamta Prasetyo, Yudo Analisis berbasis sistem informasi geografis (SIG) dapat memecahkan permasalahan teknis di bidang konstruksi, khususnya bendungan. Tujuan dari penelitian ini yaitu untuk mengetahui area dengan elevasi lebih rendah dari muka air banjir (MAB) di Bendungan Budong-Budong. Metode yang digunakan adalah analisis  SIG  dengan melakukan overlay dari data spasial yaitu data DEMNAS, area genangan waduk, DAS, sungai dan anak sungai. Hasil penelitian menunjukkan bahwa analisis overlay dapat mendeteksi 5 lokasi dengan elevasi di bawah MAB (4 lokasi di sungai dan 1 lokasi di hutan). Survei validasi dilakukan untuk memastikan elevasi di lapangan menggunakan gps handheld pada titik yang berada di hutan. Hasil validasi menunjukkan elevasi di lapangan 70,98 m dimana sudah diatas MAN tetapi masih terdapat selisih elevasi dengan MAB. Selisih elevasi tersebut tidak terlalu berpengaruh terhadap operasional maupun keamanan Bendungan Budong-Budong. Penelitian ini menunjukkan bahwa analisis SIG, khususnya analisis overlay, dapat menjadi solusi dalam pengambilan keputusan dan kebijakan dengan berbasis data spasial yang ada. Diponegoro University 2024-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/59153 TEKNIK; Vol. 45, No. 1 (2024): May 2024 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/59153/192551 Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/15557 2017-11-24T08:47:41Z teknik:EI

"170701 2017 eng " 2460-9919 0852-1697 dc Back-matter Jurnal Teknik, Ketua Editor Departemen Teknik Elektro Universitas Diponegoro Artikel editorial ini berisi back-matter jurnal Teknik Volume 38 Nomor 1 Tahun 2017 yang memuat petunjuk penulisan dan pengiriman artikel jurnal Teknik. Diponegoro University 2017-07-01 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/15557 TEKNIK; Vol 38, No 1 (2017): (Juli 2017) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1815 2012-02-15T03:18:19Z teknik:ART

2460-9919 0852-1697 dc IDENTIFIKASI IRIS MATA MENGGUNAKAN TAPIS GABOR WAVELET DAN JARINGAN SYARAF TIRUAN LEARNING VECTOR QUANTIZATION (LVQ) Setiyono, Budi Isnanto, R. Rizal iris identification, Gabor filtering, LVQ Biometric represents the human identification method development using natural characteristic of humanbeing as its bases. Every iris has the detail and unique texture, even differ between right and left eye.Theeye iris identification process in this research are data acquisition, early processing, feature exctractionand classification. Algorithm used for classification of texture slice the eye is Gabor wavelet filtering, andclassification process of slice the eye texture will be used by a Artificial Neural Network LVQ. Recognitionthe value of feature vektor in each iris obtained from to the number of right recognition value or thepercentage of right one. The best recognition percentage is 87,5 %. Diponegoro University 2012-02-02 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1815 TEKNIK; Volume 30, Nomor 1, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/34268 2021-08-29T17:46:58Z teknik:ART

"210826 2021 eng " 2460-9919 0852-1697 dc Embodied Energy and Embodied Carbon Consumption Analysis of 36-Type Simple House Building Materials Uda, Subrata Aditama K.A. Jurusan Teknik Sipil Fakultas Teknik, Universitas Palangka Raya http://orcid.org/0000-0002-7752-5599 global warming, simple house, building material, embodied energy, embodied carbon Sektor perumahan merupakan kebutuhan pokok bagi setiap orang. Setiap negara berupaya untuk memenuhi kebutuhan rumah bagi warganya, salah satunya di Indonesia yang memprogramkan satu juta rumah bagi masyarakat miskin. Dampak negatif dari program ini berupa exploitasi lahan yang besar serta kerusakan lingkungan akibat pelaksanaan konstruksi. Material bangunan merupakan unsur utama dalam kegiatan konstruksi, dimana proses produksi material banyak mengkonsumsi energi dan menghasilkan karbon dioksida (CO2). Pemilihan material yang ramah lingkungan akan menurunkan jumlah embodied energy dan embodied carbon selama siklus hidup bangunan. Penelitian ini menghitung jumlah embodied energy dan embodied carbon terhadap material bangunan yang digunakan pada bangunan rumah sederhana tipe 36 yang banyak di minati masyarakat Indonesia. Hasil penelitian menunjukkan material batu bata, atap seng, semen dan kayu merupakan material dominan yang mengkonsumsi embodied energy lebih dari 70% serta menghasilkan embodied carbon  sekitar 80% dari total energi. Total embodied energy pada material bangunan sebesar 127.714,66 MJ dengan karbon sebanyak 10.257,48 KgCO2. Berdasarkan luas bangunan diperoleh embodied energy sebesar 3.547,63 MJ/m2 dan karbon sebanyak 284,93 KgCO2/m2. Besarnya jumlah energi dan karbon yang dihasilkan oleh bangunan akan berdampak pada tingginya pencemaran lingkungan yang akan berkontribusi terhadap pemanasan global. Diponegoro University 2021-08-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/34268 TEKNIK; Vol. 42, No. 2 (2021): August 2021 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/34268/102166 Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4820 2013-05-06T03:53:16Z teknik:ART

"130402 2013 eng " 2460-9919 0852-1697 dc LOAD FAKTOR PERALATAN PADA KAPAL CARGO TYPE LCT (Studi Kasus Kapal Lestari Abadi 03) Ariany, Zulfaidah Array This article titled is equipment load factor on cargo ship LCT type by taking a case study on Lestari Abadi ship 03, the study aims to predict electric consumption calculation of LCT ship’s type which concerning with the number and type of generator; effective and efficience power consumption, safe and effective electric instalation and existing panel. So, minimum required output electric installed to Kapal Lestari Abadi 03 has to 150KW, as specification performed by caterpillar C9TA 150KW, 188KVA, 1500rpm, 50Hz and 0.8. Diponegoro University 2012-08-08 13:06:31 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/4820 TEKNIK; Volume 34, Nomor 1, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67796 2025-07-07T19:30:43Z teknik:ART

"250331 2025 eng " 2460-9919 0852-1697 dc Simbolon, Bernas "Department of Civil Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275|Universitas Diponegoro" Suripin, Suripin Suharyanto, Suharyanto Floods are one of the most frequent hydrometeorological disasters in Indonesia, particularly in river basin areas. One of the river basins frequently experiencing floods is the Sepaku Watershed (DAS Sepaku). In recent years, the intensity and frequency of flooding in this area have increased. To mitigate future occurrences, flood routing (reservoir routing) calculations are necessary. One of the measures to reduce flooding is the construction of a dam. In response, the Central Government, through the Ministry of Public Works and Housing, has undertaken the development of Sepaku Semoi Dam in Penajam Paser Utara Regency, as part of efforts to optimize water resource potential within the territorial area of the future capital city (IKN). The Sepaku Semoi Dam is projected to supply raw water at a rate of approximately 2,500 liters per second, mitigate flooding, and support tourism. This study aims to analyze flood discharge at the Sepaku Semoi Dam using the HEC-HMS model with the reservoir routing method. The modeling seeks to rapidly estimate flood discharge and assess how changes in storage capacity influence peak discharge conditions, as well as to analyze the impact of dam construction. The flood routing analysis results indicate that the flood reduction for Q1000-year return period is 74.34%, while the outflow discharge for Q50-year return period is 105.7 m³/s, which is lower than the capacity of the Tengin River downstream of the Sepaku Semoi Dam. Diponegoro University 2025-03-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67796 TEKNIK; Vol 46, No 2 (2025) April 2025 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/67796/221966 Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/13763 2020-04-17T09:36:41Z teknik:ART

"181231 2018 eng " 2460-9919 0852-1697 dc Reservoir Sedimentation Volume Changing Analysis of Pangsar Soedirman Dam Through USLE Based Rainfall Characteristics Marhendi, Teguh - Department of Civil Engineering, Faculty of Engineering, Purwokerto Muhammadiyah University http://orcid.org/0000-0001-7134-4255 sediment yields; reservoir sedimentation; rainfall characteristics This research aims to analyse the reservoir sedimentation volume changing of Pangsar Soedirman Dam at Banjarnegara regency through rain erosivity and erosion analysis using universal soil loss equation (USLE) method. The catchment area of Pangsar Soedirman Dam reservoir has rainfall ranging from 1,500 - 5,500 mm/year. In 1989 and 1993, rainfall which has ranging from 3,000 - 5,500 mm/year did not make any increase of reservoir sedimentation volume. In contrast, with rainfall 1,500 mm/year in 1998, the reservoir sedimentation volume reached 6 million m3. Similarly, with rainfall 5,500 mm/year in 1999, the reservoir sedimentation volume decreased from 6 million m3 to about 4 million m3. These results show that the characteristics of rainfall in the catchment area do not always contribute to the increase of sedimentation volume in the reservoir but can also be influenced by other determinants other than rain Diponegoro University 2018-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/13763 TEKNIK; Vol 39, No. 2 (2018): Desember 2018 eng Copyright (c) 2019 Teknik

oai:ojs.ejournal.undip.ac.id:article/1897 2012-02-24T11:23:19Z teknik:ART

2460-9919 0852-1697 dc PENGUKURAN DAN PEMETAAN KADASTRAL DENGAN METODE IDENTIFIKASI PETA FOTO Sudarsono, Bambang Laila Nugraha, Arief Land surveying, photo map, cadastral technical rule, jurisdiction rule To justify the law enforcement in the land’s ownership right, Government of Indonesia (GOI) hasestablished land registration program in all Indonesian territory that refers to the regulation. This landregistration program consists from several action which is, surveying, mapping, and land documentation.Land surveying should be refers to the cadastral technical rule and jurisdiction rule. Land surveying withphoto map identification could be applied by using photo map as base map registration. To verify the landboundaries in the field we must get an agreement from the land’s owner, neighbours, local governmentofficer and surveyor. Land surveying that use identification method should be refers to the technicalspecification order from Badan Pertanahan Nasional (BPN). There are several limitations from theidentification method; we can’t carry out this method in the crowd residence area and area which coveredby trees. Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1897 TEKNIK; Volume 29, Nomor 1, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/34121 2025-07-07T19:35:10Z teknik:ART

"220531 2022 eng " 2460-9919 0852-1697 dc Enterprise Governance of IT Audit Using DSS & MEA COBIT 2019 (Case Study: Faculty of Engineering UNDIP) Windasari, Ike Pertiwi Departemen Teknik Komputer, Universitas Diponegoro Yonanta, Monanzarifa Yonanta Departemen Teknik Komputer, Universitas Diponegoro Himawati, Ratna Yuli Departemen Teknik Komputer, Universitas Diponegoro Rochim, Adian Fatchur Departemen Teknik Komputer, Universitas Diponegoro http://orcid.org/0000-0002-1921-9358 EGIT Audit; COBIT 2019; DSS; MEA; capability level Teknologi informasi dibutuhkan oleh Fakultas Teknik Universitas Diponegoro untuk mendukung pencapaian tujuan fakultas. Fakultas ini telah menerapkan dan mengandalkan teknologi informasi untuk proses administrasi, kegiatan belajar mengajar maupun dalam melakukan proses bisnisnya sejak tahun 2004. Permasalahan yang ditemukan adalah apakah penerapan teknologi informasi telah sesuai dengan yang diharapkan oleh Fakultas Teknik UNDIP. Maka dari itu, penelitian tentang audit tata kelola terhadap teknologi informasi perlu dilakukan untuk menentukan prioritisasi management objectives, capability level saat ini, perbandingan kondisi tata kelola TI dengan tahun 2014, management objectives yang telah tercapai, dan memberikan beberapa rekomedasi. Kerangka kerja yang digunakan adalah COBIT 2019 pada dua parameter DSS (Deliver, Service, and Support) dan MEA (Monitor, Evaluate, and Assess). Berdasarkan hasil penelitian, hasil rata-rata capability level Fakultas Teknik saat ini menurut domain DSS dan MEA COBIT 2019 berada di level 1 (performed) dengan nilai rata-ratanya sebesar 36%. Fakultas Teknik mengalami penurunan, namun tujuannya kurang lebih telah tercapai melalui penerapan serangkaian aktivitas yang tidak lengkap/tidak terorganisir. Diponegoro University 2022-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/34121 TEKNIK; Vol. 43, No. 1 (2022): May 2022 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/34121/101743 Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/7151 2015-01-31T23:58:43Z teknik:ART

"141230 2014 eng " 2460-9919 0852-1697 dc ANALISIS PROFIL VARIASI TEGANGAN DAN KEANDALAN LISTRIK JARINGAN TEGANGAN RENDAH PLN SEMARANG SELATAN BERBASIS DATA-LOGGER Adiwismono, Agus Jurusan Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada, Jalan Grafika No.2, Yogyakarta 55281 Wijaya, F. Danang Jurusan Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada, Jalan Grafika No.2, Yogyakarta 55281 Tiyono, T. Jurusan Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada, Jalan Grafika No.2, Yogyakarta 55281 Array Pengukuran kualitas dan perhitungan keandalan listrik sampai saat ini masih diperoleh dari data secara manual. Diperlukan alat data-logger yang dapat merekam nilai tegangan (indikator kualitas), dan merekam lama-waktu-padam dan berapa-kali-padam (indikator keandalan) secara realtime, sehingga diperoleh data yang akurat, yang akan meningkatkan mutu dan pelayanan listrik dengan lebih efektif dan efisien. Berbasis data logger maka analisis profil variasi tegangan dapat langsung diketahui yaitu dalam bentuk gambar gelombang (profil) variasi tegangan, demikian pula analisis SAIDI dan SAIFI dapat langsung dilakukan, yaitu dari hasil rekam data selama pengukuran lalu dihitung dengan rumus. Hasil penelitian pada penyulang jaringan tegangan rendah (JTR) SRL01, variasi tegangan yang terjadi adalah: di pangkal penyulang Vmaks = 220 volt, Vmin = 199 volt, dan di tengah penyulang Vmaks = 221 volt, Vmin = 206 volt, dan di ujung penyulang Vmaks = 221 volt, Vmin = 200 volt; dibandingkan terhadap standar variasi Vmaks = 230 volt dan Vmin = 197 volt, maka variasi tegangan yang terjadi sesuai standar. Dari perhitungan, angka lama padam (SAIDI) di sisi JTR penyulang SRL01 0,85 jam/pelanggan/bulan (belum memenuhi standar) dan angka kali padam (SAIFI) 1,05 kali/pelanggan/bulan (sudah memenuhi standar). [The Analysis of Voltage Variation Profile And Electrical Reliability of The Low Voltage Network Using Data-Logger In PLN of South Semarang] Manual measurement applied to the measurement of electricity quality and reliability has resulted in less accurate data. Data logger which records voltage value (quality indicator) and records the realtime duration and frequency of blackouts (reliability indicator) is needed to achieve accurate data, and improve the quality and services effectively and efficiently. By using the data logger the analysis of varied voltage profiles can directly be collected in the form of voltage wave (profiles), and therefore the analysis of SAIDI and SAIFI can be implemented. In the SRL01 low voltage (JTR) feeder, the form of the voltage shows : Vmax = 220 volt and Vmin = 199 volt in starting point feeder, Vmax = 221 volt and Vmin = 206 volt in the middle feeder, Vmax = 221 volt and Vmin = 220 volt in the end point feeder. Compared to the consideration standard, which shows Vmax = 230 volt and Vmin = 197 volt, the result is appropriate. Based on the calculation interruption period quantity (SAIDI) in the side of JTR feeder SRL01 shows the number of 0,85 hour/customer/month (which means it’s still under the standard) and interruption frequency quantity (SAIFI) shows the number of 1,05 time/ customer/month (which means it meets a demand with the standard). Copyright (c) 2014 by Fakultas Teknik, Undip. All right reserved. Diponegoro University 2015-01-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/7151 TEKNIK; Vol 35, No 2 (2014): (Desember 2014) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1942 2012-02-24T11:16:25Z teknik:ART

2460-9919 0852-1697 dc COMPARATIVE ANALYSIS OF GROUNDING RESISTANCE VALUE IN SOIL AND SEPTICTANK Syakur, Abdul Juningtyastuti, Juningtyastuti Dermawan, Arif grounding system, grunding resistance, septictank, soil. The aim of grounding system to protect of electrical equipment and instrumentation system and peopletogether. The lightning stroke near the strucutre of building can damage of equipment and instrumentationsystem. Therefore, it is very important to protect theese electrical and electronic equipment from lightningstrike uses lightning protection system and grounding system.This paper presents kind of grounding system at type of soil and place. The measurement of groundingresistance in soil and septictank have done. Types of soil for grounding resistance measuring aremarshland, clay and rockland.The measurement results of grounding resistance show that value of grounding resistance depend ondeepness of electrode and kind of soil and septictank. Grounding resistance value in septictank is morelower than soil. Diponegoro University 2012-02-02 14:39:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1942 TEKNIK; Volume 29, Nomor 3, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/47582 2023-01-24T23:37:53Z teknik:ART

"221229 2022 eng " 2460-9919 0852-1697 dc Autonomous Car Mechanical Performance Analysis with Region of Interest Method Using Raspberry Pi 4 and Arduino Nano Dewantara, Martinus Hendra Pawiyatan Luhur Sel. IV No.1, Bendan Duwur, Kec. Gajahmungkur, Kota Semarang, Jawa Tengah 50234 Pratomo, Leonardus Heru Riyadi, Slamet Raspberry Pi 4; Arduino Nano; HSV System; Region of Interest; Autonomous Car Perkembangan ilmu pengetahuan dan teknologi kecerdasan buatan kini sudah mulai merambah pada bidang otomotif. Autonomous car ialah salah satunya. Teknologi ini mengambil peran termasuk diantaranya kemampuan sensor lidar, sistem Global Positioning System (GPS), dan pembacaan citra melalui kamera. Peneltian ini menganalisis autonomous car menggunakan sistem pembacaan citra dengan menggunakan kamera sebagai sensor optik. Deteksi objek diperlukam secara realtime karena autonomous car terus bergerak mengikuti lintasan. Peneliti menggunakan klasifikasi warna Hue, Saturation, Value (HSV) dengan metode Region of Interest (ROI), yang memiliki kemampuan untuk menandai area tertentu sehingga dapat digunakan untuk mengoptimalkan kinerja sistem untuk mendeteksi dan mengklasifikasi lintasan secara cepat dan tepat. Autonomous car ini menggunakan sistem 4 Wheels Drive (4WD) dengan motor Direct Current (DC) sebagai penggerak utama. Raspberry Pi 4 dan Arduino nano sebagai mainboard untuk pengoperasiannya. Metode pengujian pada penelitian ini meliputi pengujian image processing menggunakan Region of Interest, pengujian ini meliputi deteksi jalan yang sudah dirancang dan pengujian mekanikal penggerak yang digunakan pada autonomous car ini. Pada penelitian ini telah dilakukan uji coba dan prototype ini berhasil bekerja sesuai dengan algoritma yang sudah dibuat. Pada uji coba ini, Autonomous Car menggunakan metode ROI memiliki akurasi baca dan pergerakan yang sangat akurat. Pada Uji coba dan implementasi perangkat keras yang dilakukan di laboratorium autonomous car ini dengan kecerdasan buatan dapat bekerja sesuai dengan algoritma yang dibuat dengan tingkat keberhasilan sebesar 90%. Diponegoro University 2022-12-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/47582 TEKNIK; Vol. 43, No. 3 (2022): December 2022 ind Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/8757 2016-01-07T04:08:41Z teknik:ART

"151210 2015 eng " 2460-9919 0852-1697 dc ARAHAN ZONASI DAN PENGEMBANGAN DI KAWASAN SITUS CAGAR BUDAYA PATIAYAM KABUPATEN KUDUS Atsnansyah, Maulana Mohammad Jurusan Perencanaan Wilayah dan Kota, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Dewi, Diah Intan Kusuma Jurusan Perencanaan Wilayah dan Kota, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, zonasi; situs cagar budaya patiayam; wisata budaya; zoning; cultural heritage site of patiayam; cultural tourism Kawasan Situs Cagar Budaya Patiayam di Desa Terban Kabupaten Kudus merupakan lokasi yang memerlukan tindakan pelestarian terhadap kebudayaan dan lingkungannya, karena di kawasan tersebut belum ada upaya keberlanjutan dalam menjaga dan melindungi kawasan situs cagar budaya serta belum adanya upaya pengembangan kebudayaan lokal pada kawasan tersebut. Berdasarkan permasalahan tersebut upaya yang dilakukan untuk meningkatkan fungsi dari kawasan adalah dengan membuat zonasi atau pembagian fungsi lahan yang jelas. Tujuan akhir yang diharapkan adalah untuk memberikan arahan zonasi pada setiap kawasan yang dijadikan sebagai kawasan konservasi dan kawasan wisata budaya. Tahapan awal dalam penelitian ini adalah dengan mengetahui potensi dan masalah yang terdapat pada kawasan tersebut melalui pengumpulan data yang bersifat kualitatif. Sedangkan untuk mengetahui arahan sesuai dengan potensi yang dimiliki serta menyelesaikan permasalahan yang ada di Kawasan Situs Cagar Budaya Patiayam menggunakan metode deskriptif kualitatif dan metode delphi. Hasil dari jawaban penelitian yang dilakukan terhadap Kawasan Situs Cagar Budaya Patiayam di Desa Terban Kabupaten Kudus ialah adanya zonasi yang jelas serta arahan pengembangan pada tiap kawasan. Pembagian zonasi pada kawasan Situs Cagar Budaya Patiayam dibagi menjadi 4 zona, yaitu zona inti, zona penyangga, zona pengembangan, dan zona penunjang.   [Title: Zoning and Development Suggestions at Cultural Heritage Sites of Patiayam in Kudus Regency] Cultural Heritage Site of Patiayam in Terban Village Kudus Regency is a location that requires preservation towards its culture and environment, because in this area there is no sustained effort in maintaining and protecting the cultural heritage site, and lack of local cultural development efforts. Based on the problems, effort that should be done to improve the function of the area is by making a zoning or a clear division of land functions. The ultimate goal is to provide the zoning direction on each area that serve as a conservation area and the area of cultural tourism. The early stages in this research is to know the potential and problems in the area through the data collection with qualitative approach. As for knowing the direction corresponding with potential, as well as resolving existing problems in the area of cultural heritage Site of Patiayam, this research used qualitative-descriptive method and delphi method. The result of the research answer conducted towards the area of Cultural Heritage Site of Patiayam in Terban Village Kudus Regency is a clear zoning and direction of development in each area. Zoning division in the area of Cultural Heritage Sites of Patiayam is divided into four zones, namely the core zone, buffer zone, development zone and the supporting zone.   Diponegoro University 2015-12-09 12:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/8757 TEKNIK; Vol 36, No 2 (2015): (December 2015) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1728 2012-02-10T06:41:42Z teknik:ART

2460-9919 0852-1697 dc EVALUASI DOKUMEN ASPEK TEKNIS PADA PROSES PELELANGAN KONTRAKTOR DENGAN APILKASI METODE AHP (ANALYTICAL HIERARCHY PROCESS) Wibowo, M.Agung Suliantoro, Heri Marithyanti, Shinta Procurement, AHP, Contractor The procurement process could be defined as all the activities required in getting a product or a service from thesupplier to the customer. It consists of the purchasing function, storing, transportation and managers therelations between suppliers and internal customers. The Analytical Hierarchy Process (AHP) is acomprehensive, logical structured frame work. It allows to improve understanding of complex decission systemby decomposing the problems. The AHP is based three principles which are decomposition of the problems,comparative judgement of the elements and synthesis of the priorities.The objectives of this study are to identify criteria involved in the contractor bidding process, to elaboratetechnical aspect involeved in the bidding process based on committee’ experince and to discuss and to comparethe outputs obtained based on the committee’ experience and the application of the AHP.The results of the study said that construction method has the highest ranking compare other apecst which is27%. The next ranking are time scheduling (16%), technical specification and material (13%), organizationalproject and person incharged (10%), construction labour scheduling (10%), list of equipment (8%), cash flowestimation (6%), list of sub-contractor and project site facilities (5%). These rangking could be used todetermine the score of contractors to do bidding process. Diponegoro University 2012-02-02 14:48:56 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1728 TEKNIK; Volume 32, Nomor 2, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/24518 2020-10-05T04:52:25Z teknik:ART

"200831 2020 eng " 2460-9919 0852-1697 dc Pengaruh Konsentrasi Unsur Kalium, Karbon, dan Aerasi pada Bioremediasi Air Limbah Boezem dengan High Rate Algae Pond Ratnawati, Rhenny Fakultas Teknik, Universitas PGRI Adi Buana Surabaya http://orcid.org/0000-0001-8110-0764 Nurhayati, Indah Fakultas Teknik, Universitas PGRI Adi Buana Surabaya Sari, Venny Yunita Fakultas Teknik, Universitas PGRI Adi Buana Surabaya aerasi, air boezem; bioremediasi; high rate algae pond; kalium, karbon High Rate Algae Pond (HRAP) adalah salah satu teknologi yang efektif untuk mengolah air limbah domestik. Penelitian ini bertujuan mengkaji pengaruh penambahan unsur kalium (K), karbon (C), dan aerasi terhadap proses bioremediasi air boezem. Reaktor yang digunakan berupa toples kaca berukuran 8 liter dengan komposisi air boezem: kultur alga adalah 25%:75%. Air limbah domestik yang digunakan berasal dari air boezem Kalidami, Surabaya. Pembiakkan alga berasal dari kolam pribadi warga di Sidoarjo. Variabel penelitian adalah penambahan unsur K (0%, 1% dan 3%), konsentrasi C (0 mg/L dan 29,41 mg/L), dan aerasi. Parameter yang diukur adalah konsentrasi COD, MLVSS, dan nilai pH pada hari ke-0, 3, 6, 9, 11, 13, 16, 18. Analisis konsentrasi COD, MLVSS, dan nilai pH dengan menggunakan metode titrimetrik (APHA 5220 C), metode gravimetri (SNI 06-6989.26-2005), dan menggunakan alat pH meter (SNI 06-6989.14-2004). Hasil dari penelitian ini menunjukkan bahwa penurunan konsentrasi COD yang paling optimal terlihat hari ke-6 pada reaktor dengan penambahan unsur K sebesar 3% dan konsentrasi C 29,41 mg/L dengan efisiensi mencapai 46% (45,2 mg/L). Konsentrasi COD pada hari ke-6 penelitian memenuhi baku mutu kelas III berdasarkan Peraturan Daerah Kota Surabaya Nomor 2 Tahun 2004 Tentang Pengelolaan Kualitas Air dan Pengendalian Pencemaran Air dengan nilai yang dipersyaratkan adalah 50 mg/L. Konsentrasi MLVSS tertinggi terdapat pada reaktor dengan penambahan unsur K (1% dan 3%), C (29,41 mg/L), dan aerasi. Konsentrasi MLVSS tertinggi terdapat pada reaktor dengan penambahan unsur K (1% dan 3%), C (29,41 mg/L), dan aerasi. Penambahan unsur K dan C tidak mempengaruhi nilai pH. Diponegoro University 2020-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/24518 TEKNIK; Vol 41, No. 2 (2020): August 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2118 2012-02-23T04:50:20Z teknik:ART

2460-9919 0852-1697 dc PENUKAR KALOR CANGKANG DAN TABUNG EFEKTIF UNTUK MENDINGINKAN MINYAK PELUMAS MESIN DIESEL DENGAN PENYARINGAN SISTEM CABANG Murni, Murni Lubrication, diesel engine Lubrication is important parameter in whole operation in diesel engine, bad lubrication will affect trouble inoperation lubrication have double function decrease friction and cooling. So lubrication has to be treatmentto increase quality by cooling method. Cooling method is done with bat exchanger of shell and tube type. . Diponegoro University 2012-02-10 11:25:01 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2118 TEKNIK; Volume 28, Nomor 2, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/57885 2024-01-16T21:44:16Z teknik:ART

"231213 2023 eng " 2460-9919 0852-1697 dc Study of Machining Strategies for CNC Milling of Foot Prosthetic Using Taguchi Methodology Lestari, Wahyu Dwi Department of Mechanical Engineering, Faculty of Engineering, University of Pembangunan Nasional "Veteran" Jawa Timur https://orcid.org/0000-0002-5863-4968 Adyono, Ndaru Department of Mechanical Engineering, Faculty of Engineering, University of Pembangunan Nasional "Veteran" Jawa Timur Faizin, Ahmad Khairul Department of Mechanical Engineering, Faculty of Engineering, University of Pembangunan Nasional "Veteran" Jawa Timur Sanjaya, Kadek Heri Research Centre for Smart Mechatronics, Research Organisation for Electronics and Informatics, National Research and Innovation Agency (BRIN) ANOVA; machining time; Taguchi method; signal to noise; foot prosthetic The use of CNC milling machines in the industrial sector greatly contributes to the production of high-quality products that align with consumers' desired shapes. Currently, the precise machining parameters for manufacturing a product are determined through a time-consuming and costly process of trial and error. Most prior significant studies have examined the variables that can impact the duration of machining time. However, different machining conditions require different control factors. The key objective of this study is to enhance the machining parameters and identify the crucial factors that influence the duration of machining in the production of foot prostheses. The experiment was conducted using a 3-axis CNC milling machine with five machine parameters: spindle speed, feed rate, step over, depth of cut, and toolpath strategy. The Taguchi method with orthogonal array L2735 was chosen as an optimization method. The optimum machine parameters are analyzed using signal-to-noise (S/N) ratio and ANOVA. The analysis shows that spindle speed is the most influential variable on machine time. The next factor is the depth of cut, feed rate, and toolpath strategy, and the last is step over. Diponegoro University 2023-12-08 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/57885 TEKNIK; Vol. 44, No. 3 (2023): December 2023 eng Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/13311 2020-04-17T09:32:52Z teknik:EI

"161231 2016 eng " 2460-9919 0852-1697 dc Back-matter Istadi, Istadi teknik; jurnal teknik Back-matter Diponegoro University 2016-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/13311 TEKNIK; Vol 37, No 2 (2016): (Desember 2016) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1765 2012-02-10T07:57:25Z teknik:ART

2460-9919 0852-1697 dc EKSISTENSI “PASAR SEMAWIS” SEBAGAI SALAH SATU STRATEGI REVITALISASI KAWASAN PECINAN SEMARANG Purwanto, Edi Revitalization, Chinatown Area, “Pasar Semawis” Revitalization is one of preservation kinds with adapting old building that is impractical to serve new use and inthe same time, to prevent the original characteristics. Revitalization can be done without or with changingbuilding formation. Sometimes, it really cannot be avoided if it is viewed from benefit expense analysis, it doesnot bring benefit to be preserved, so that, let the building façade be prevented, thus, the observer can imaginecity face in the past time.Revitalization effort of old city is not merely effort to preserve building, but also effort that has broughteconomic life in the less developed area. Preservation effort at the moment is holistic effort that aims to givebetter society life quality based on old resource power and to do life injection that is interesting and creative andsustainable, with involving society by calculating economy value. Management is instrument to achieve aimincluding society total involvement that is people centered management-oriented.Revitalization of Chinatown of Semarang area shall be read as an effort to bring back Chinatown area that hasethnic specification. Revitalization effort also has aim to bring Chinatown area life as well as to be tourismdestination as it has been implemented in several other countries, like Singapore, Australia, Malaysia andseveral others.One effort to fulfill revitalization of Chinatown area of Semarang is to give activity stimuli that is hoped to beable to be tourist’s interest. That interest is “Pasar Semawis”that is night fair in Chinatown area of Semarang.“Pasar Semawis” is only a part of revitalization. In the other word, if the revitalization is the aim, thus, “PasarSemawis” is one instrumen used to fulfill it. Diponegoro University 2012-02-02 14:46:02 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1765 TEKNIK; Volume 31, Nomor 2, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/33261 2021-06-03T02:07:05Z teknik:ART

"210510 2021 eng " 2460-9919 0852-1697 dc Analysis Of The Residual Red Soil Shear Test With The Slurry Method In The Regency Of Semarang Pardoyo, Bambang Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro Wirawan, Briota Akhbar Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro Huda, Khoirul Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro red soil; residual; slurry; direct shear; free swell Tanah residual terdapat di sebagian besar daerah dengan topografi pegunungan, perbukitan, dan yang bergelombang. Tanah ini berwarna merah atau coklat. Penelitian ini bertujuan untuk mengetahui sifat fisis dan mekanis tanah pada kondisi tanah asli dan tanah residual dengan metode slurry. Obyek penelitian adalah tanah merah residual yang diambil dari Kecamatan Ungaran Timur, Kecamatan Bergas, dan Kecamatan Bawen. Pengujian sifat fisis dan mekanis menunjukkan bahwa sampel tanah termasuk jenis lempung (clay) dengan mineral penyusun kaolinite dan kemampuan mengembang sedang, dan pengujian direct shear dari lokasi L1, L2, dan L3 didapatkan nilai sudut geser residual peak dengan metode slurry sebesar 29.249°; 31.341°; 31.964° dan nilai sudut geser residual konstan sebesar 8.082°; 8.138°; 7.294°, nilai sudut geser tanah asli memiliki nilai sebesar 32.82°; 31.44°; 31.98. Semakin tinggi nilai plasticity index maka nilai free swell semakin tinggi. Nilai sudut geser residual peak dan plasticity index masih di dalam lingkup standar deviasi hasil pengujian. Nilai sudut geser residual konstan dengan metode slurry jauh lebih kecil dibanding grafik hasil pengujian. Diponegoro University 2021-05-03 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/33261 TEKNIK; Vol. 42, No. 1 (2021): May 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4811 2013-05-06T01:48:11Z teknik:ART

"130402 2013 eng " 2460-9919 0852-1697 dc MODIFIKASI KARBON AKTIF SEBAGAI ADSORBEN UNTUK PEMURNIAN BIOGAS Susanto, Heru Wijaya, Wishnu Widiasa, I Nyoman Array The use of biogas as an environmentally friendly fuel is limited by the presence of CO2 and water vapor as impurities. Therefore, biogas purification for CO2 and water vapor removal is very important step during biogas application. This paper presents a process for biogas purification by means of adsorption using either modified or unmodified activated carbon as an adsorbent. The modification was performed by passing a pure ammonia gas into activated carbon in a quartz reactor. The results showed that the adsorption process using modified activated carbon decreases CO2 content in biogas up to 67.5% whereas for unmodified activated carbon was of 43%. Further, the modification increased CO2 adsorption capacity from ~28 to ~38 mg CO2/g adsorbent. The increase in feed temperature decreases CO2 adsorption capacity. Diponegoro University 2012-08-08 13:06:31 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/4811 TEKNIK; Volume 34, Nomor 1, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/60146 2025-04-17T01:00:52Z teknik:ART

"241230 2024 eng " 2460-9919 0852-1697 dc Comparison of Swing Arm Designs for Converting Scooter-Type Motorcycles into Electric-Powered Vehicles Rahmadi, Apri Program Studi Teknik Mesin, Universitas Muhammadiyah Pontianak, Jl. Jenderal Ahmad Yani No.111, Pontianak, Indonesia 78123 https://orcid.org/0000-0001-6372-7184 Mursalin, Mursalin Program Studi Teknik Mesin, Universitas Muhammadiyah Pontianak, Jl. Jenderal Ahmad Yani No.111, Pontianak, Indonesia 78123 Ahmad Bustami, Riyan Program Studi Teknik Mesin, Universitas Muhammadiyah Pontianak, Jl. Jenderal Ahmad Yani No.111, Pontianak, Indonesia 78123 motorcycle; electrification; swing arm; stress analysis The percentage of motorcycle population in Indonesia reaches 82% of the total number of motorized vehicles. Almost all of these motorcycles are gasoline-powered vehicles, which ultimately consume a significant amount of fossil fuels and contribute to approximately 5% of greenhouse gas emissions. In addressing this issue, the government is promoting a motor vehicle electrification program. Motorcycles are predominantly automatic scooter types, presenting a significant opportunity for the vehicle electrification program. This research aims to design a swing arm used in converting automatic scooter-type motorcycles into electrically powered ones. In this study, three different swing arm designs were created: standard type, tubular type, and banana type. Stress analysis was conducted on these three swing arms under a load of 180 kg. The results indicate that the banana-type swing arm is the best design due to its superior strength and lighter weight. The designed banana swing arm has a weight of only 4.37 kg, experiences von Mises stress of 73.58 MPa, displacement of 0.46 mm, and a safety factor of 2.81 Diponegoro University 2024-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/60146 TEKNIK; Vol 45, No 3 (2024): December 2024 eng https://ejournal.undip.ac.id/index.php/teknik/article/download/60146/193806 Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/15659 2020-04-17T09:36:02Z teknik:ART

"180731 2018 eng " 2460-9919 0852-1697 dc SINTESIS DAN KARAKTERISASI ZnO SEBAGAI COATING ANTIKOROSI ZnO/Al(OH)3 PADA MATERIAL BAJA KARBON Setiawan, Adhi Politeknik Perkapalan Negeri Surabaya ZnO; ketahanan korosi; coating; polarisasi linear; SEM ZnO seringkali digunakan sebagai aplikasi pigmen anti korosi pada logam karena tidak beracun, ramah lingkungan, murah serta memiliki ketahanan korosi yang relatif baik. Partikel ZnO dalam penelitian ini disintesis dengan menggunakan metode presipitasi dengan ZnCl2 dan NaOH sebagai prekursor. Partikel ZnO yang dihasilkan dengan metode tersebut memiliki morfologi berbentuk batang dengan ujung lancip. Hasil SEM menunjukkan bahwa semakin rendah konsentrasi NaOH maka ukuran partikel ZnO yang dihasilkan akan semakin kecil. Pada konsentrasi NaOH sebesar 0,5 M dihasilkan ZnO dengan ukuran terkecil sebesar 123 nm. Hasil XRD menunjukkan bahwa ZnO memiliki kristalinitas tinggi dengan ukuran kristal mencapai 47 nm pada konsentrasi NaOH sebesar 0,5 M. Penggunaan pigmen ZnO/Al(OH)3 menunjukkan ketahanan korosi yang baik pada larutan NaCl 3,5% dengan specimen baja karbon. Hasil penelitian menunjukkan bahwa pada komposisi ZnO/Al(OH)3 sebesar 1:3 memiliki ketahanan korosi yang terbaik karena memberikan nilai laju korosi terendah yaitu sebesar 0,86 mpy. Diponegoro University 2018-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/15659 TEKNIK; Vol 39, No 1 (2018): (July 2018) eng Copyright (c) 2018 Teknik

oai:ojs.ejournal.undip.ac.id:article/1887 2012-02-24T10:39:03Z teknik:ART

2460-9919 0852-1697 dc ANALISIS POTENSI PENERAPAN KERJASAMA PEMERINTAH SWASTA (KPS) DALAM PENGEMBANGAN INFRASTRUKTUR TRANSPORTASI DI PERKOTAAN (Studi Kasus Kota Semarang) Setianto Kurniawan, Eri Pudjianto, Bambang Wicaksono, Y.I. Array The role of Local Government (Province and District / City) become very important in creating atransportation infrastructure that can support a regional transportation activities and implementing thePublic Private Partnership (PPP) model as an alternative financing strategies other than APBN / APBD.The purpose and goal of this research is to conduct a comprehensive study in order to obtain a picture of thepotential level of urban transport infrastructure development (case study of Semarang City) who performedwith the Public Private Partnership (PPP) model, viewed from the perspective of related stakesholder.Research methodology using descriptive statistical approach and SWOT analysis with the matrix space model.The research concluded that the potential application of PPP policies in the development of transportationinfrastructure in the city of Semarang is located at the conservative level, which means that although there area number of external strategic factors which potentially threat to the implementation of the PPP policies,there is still a commissioner of the strength of internal factors that can be optimized. Diponegoro University 2012-02-15 10:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1887 TEKNIK; Volume 30, Nomor 3, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/43392 2021-12-26T19:56:54Z teknik:EI

"211217 2021 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi back-matter TEKNIK Volume 42 Nomor 3 Tahun 2021 yang memuat petunjuk penulisan dan pengiriman artikel TEKNIK. Diponegoro University 2021-12-17 04:29:52 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/43392 TEKNIK; Vol 42, No. 3 (2021): December 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/6822 2014-12-24T01:51:51Z teknik:ART

"141010 2014 eng " 2460-9919 0852-1697 dc KAJIAN REPARASI PENGECATAN PADA LAMBUNG KAPAL (STUDI KASUS KM. KIRANA 3) Ariany, Zulfaidah Program Studi Diploma Teknik Perkapalan, Fakultas Teknik, Universitas Diponegoro Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, 50275 Array [Title: Study on Painting Repair of Hull Ship (Case Study of KM. Kirana 3)] Regular and scheduled maintenance are important things to make sure any ships could work and sail properly. So the main purpose to carry peoples or deliver the goods can be run smoothly. Painting is one of that items. It can protect the body or their parts from rust attack, in common word, corrosion. Estimating the paints consumption upon maintenances are very useful for ship owners, project owners neither shipyards. Upon ship KM. Kirana’s hull reparation, an analysis process can calculate the estimation of her paints consumption: For hull paint reparation of KM Kirana 3, it needed estimated 8 cane (20 liter) for bottom painting, 13 canes for bottom top, 42 canes for topside and 6 canes for weather and upper deck. Diponegoro University 2014-10-20 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/6822 TEKNIK; Vol 35, No 1 (2014): (July 2014) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/68465 2025-11-17T01:02:24Z teknik:ART

"251117 2025 eng " 2460-9919 0852-1697 dc Digital Competencies Among Construction Students in Ghana's Technical Universities: A Quantitative Assessment from the Students’ Perspective Hagan, Daniel Ebo Department of Construction Technology and Management, School of Built and Natural Environment, Cape Coast Technical University, Cape Coast, Ghana. School of Postgraduate Studies, Faculty of Technology and Vocational Education, Universitas Pendidikan Indonesia, Jalan Dr. Setiabudhi No. 229, Bandung, 40154 https://orcid.org/0000-0003-2166-8942 Aryanti, Tutin School of Postgraduate Studies, Faculty of Technology and Vocational Education, Universitas Pendidikan Indonesia, Jalan Dr. Setiabudhi No. 229, Bandung, 40154 http://orcid.org/0000-0001-6986-0680 Ilhamdaniah, Ilhamdaniah School of Postgraduate Studies, Faculty of Technology and Vocational Education, Universitas Pendidikan Indonesia, Jalan Dr. Setiabudhi No. 229, Bandung, 40154 Digital Competencies; Construction Education; Technical Universities; Job Market Readiness; Construction Industry The construction industry’s digital transformation demands professionals with advanced digital skills. This study assesses the digital competencies of construction students at Ghana’s technical universities, focusing on self-reported proficiency and perceived job readiness. Based on data from 271 final-year students across six institutions, the study employs a data-driven quantitative approach using a structured questionnaire and analyses through descriptive statistics, correlation, and regression. Findings reveal moderate proficiency in foundational skills like digital literacy and communication, but significant gaps in advanced areas such as cloud computing, 3D modelling, and coding. While students report high access to general digital tools, training in emerging technologies remains limited. Regression results indicate that digital literacy, planning and estimation skills, and access to training resources are key predictors of job readiness. The study highlights the need for curriculum reforms that incorporate a wider range of digital competencies aligned with Construction 4.0. It recommends enhancing hands-on learning, improving institutional support systems, and encouraging self-directed skill development. These interventions are crucial to bridging the gap between academic preparation and industry expectations, equipping graduates with the capabilities required for a digitally evolving construction sector in Ghana. Diponegoro University 2025-11-17 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/68465 TEKNIK; Vol 46, No 3 (2025): Juli 2025 eng Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/23893 2020-04-17T09:38:35Z teknik:ART

"191111 2019 eng " 2460-9919 0852-1697 dc Rezagama, Arya Diponegoro University Sarminingsih, Anik Rahmadani, Ajeng Yasinta Aini, Afifah Nadya Kualitas air sungai sangat dipengaruhi oleh besarnya debit yang mengalir serta kondisi kualitas air pada kawasan hulu. Sungai Pepe merupakan saluran penggelontor kota Surakarta yang diharapkan dapat difungsikan menjadi area wisata. Namun kualitas air Sungai tersebut termasuk dalam golongan IV atau tidak sesuai dengan peruntukannya. Limbah domestik dan industri UKM yang masuk ke sungai serta rendahnya baseflow sungai menjadi penyebabnya. Penelitian ini bertujuan untuk memodelkan kualitas air Sungai Pepe dengan melakukan variasi suplesi debit dari Sungai Anyar sehingga kualitas air Sungai Pepe menjadi lebih baik. Simulasi dilakukan dengan menggunakan model Qual2Kw. Pengukuran kualitas air eksisting dilakukan pada 6 titik pengambilan sampel. Variasi debit suplesi yang digunakan meliputi kondisi eksisting, suplesi 0,5 m3/s dan 1 m3/s. Debit suplesi ke Sungai Pepe Hilir dapat di atur melalui pintu air di Sungai Anyar. Hasil penelitian menunjukkan bahwa kualitas air secara umum menjadi lebih baik sepanjang ruas sungai. Parameter DO dan COD membaik menunjukkan kemampuan areasi yang membaik akibat hidrodinamika aliran sungai. Adanya pencampuran limbah tekstil pada anak sungai masih menjadi parameter yang dominan dalam penurunan kualitas air sungai. Diponegoro University 2019-11-11 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/23893 TEKNIK; Vol 40, No. 2 (2019): Agustus 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/45612 2022-09-19T00:37:33Z teknik:ART

"220830 2022 eng " 2460-9919 0852-1697 dc Analisa Pengaruh Metode Hot Dip Galvanizing Dengan Variasi Temperatur dan Waktu Pencelupan Terhadap Laju Korosi Pipa Air Laut Kapal Material Baja AISI 1020 Santosa, Ari Wibawa Budi Department of Naval Architecture, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Bungkang, Reimigius Baskatara Department of Naval Architecture, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Mursid, Ocid Department of Naval Architecture, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 Laju Korosi, Hot Dip Galvanizing, Kehilangan Berat, Baja AISI 1020, Pipa Air Laut Baja AISI 1020 dalam industri perkapalan banyak digunakan sebagai pipa air air laut kapal. Dilihat dari kegunaannya baja jenis ini akan mudah terkorosi jika mengaliri air laut tanpa perlindungan apapun, hal tersebut disebabkan karena air laut merupakan salah satu media korosif bagi baja. Tujuan dilaksanakannya penelitian ini untuk mengetahui pengaruh penggunaan metode pelapisan Hot Dip Galvanizing dengan variasi temperatur dan lama waktu pencelupan terhadap laju korosi pipa kapal baja AISI 1020. Temperatur yang digunakan pada proses galvanis adalah 440 ºC, 455 ºC, dan 480 ºC dengan variable waktu pencelupan 2 menit, 4 menit, dan 6 menit. Efek korosi dipantau selama 192 jam dengan media air laut Pantai Cipta Kota Semarang. Dari hasil pengukuran weight loss didapatkan hasil bahwa laju korosi baja non galvanis sebesar 1,81462 mmpy, Sedangkan laju korosi teroptimal dari masing-masing variasi temperatur dengan penggunaan metode Hot Dip Galvanizing pada 440ºC waktu pencelupan 6 menit sebesar 0,01796 mmpy, pada 455 ºC waktu pencelupan 6 menit sebesar 0,01289 mmpy, dan pada 480ºC waktu pencelupan 4 menit sebesar 0,0074 mmpy. Berdasarkan data tersebut penggunaan metode pelapisan Hot Dip Galvanizing mampu mengurangi laju korosi yang terjadi pada baja AISI 1020. Diponegoro University 2022-07-04 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/45612 TEKNIK; Vol. 43, No. 2 (2022): August 2022 eng https://ejournal.undip.ac.id/index.php/teknik/article/download/45612/142573 https://ejournal.undip.ac.id/index.php/teknik/article/download/45612/142574 https://ejournal.undip.ac.id/index.php/teknik/article/download/45612/142575 Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/7823 2015-10-17T03:39:04Z teknik:ART

"150704 2015 eng " 2460-9919 0852-1697 dc PELUANG PENGEMBANGAN SMART CITY UNTUK MEWUJUDKAN KOTA TANGGUH DI KOTA SEMARANG (Studi Kasus: Penyusunan Sistem Peringatan Dini Banjir Sub Drainase Beringin) Sariffuddin, Sariffuddin Jurusan Teknik Perencanaan Wilayah & Kota, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang 50275 kota tangguh; kota pintar; sistem peringatan dini; urban resilience;smart city; early warning system Kota tangguh menjadi metafora baru yang banyak diperdebatkan oleh para perencana dan peneliti kota dalam upaya menjamin keberlanjutan. Konsep ini mengusulkan 2 kerangka konsep yaitu model ekuilibrium dan model non-ekuilibrium. Perbedaan kedua model ini adalah cara kota untuk beradaptasi terhadap bahaya yang dihadapi. Di model keseimbangan/ ekuilibrium, sistem kota harus memiliki titik acuan sebagai orientasi tujuan pembangunan kota. Jika terdapat gap antara dokumen perencanaan dan hasil pembangunan, perencana kota dapat mengembalikan proses perencanaan sesuai tujuan perencanaan dan pembangunan. Di sisi lain, model non-ekuilibrium menawarkan sistem adaptasi. Dalam perspektif non-ekuilibrium, ketahanan diartikan sebagai kemampuan sistem kota untuk beradaptasi dan menyerap perubahan dari internal maupun eksternal. Terdapat kebutuhan baru dalam mengelola kota yaitu respon cepat, data yang akurat dan real time. Konsep kota pintar/ smart city menawarkan sebuah solusi melalui penyediaan data real time dan menjadi penghubung antara intervensi top-down dengan partisipasi bottom-up. Kota pintar tidak hanya menyediakan sistem informasi dan teknologi, namun juga mendukung modal intelektual. Artikel ini menggunakan studi literature melalui perbandingan 2 konsep literature yaitu smart city dan kota tangguh/ resilience city. Dari pembahasan diketahui bahwa smart city dapat mendukung kota untuk bisa bertahan melalui sistem peringatan dini. Sistem ini dapat meningkatkan kemampuan masyarakat untuk mengetahui bahaya dan mendukung upaya yang harus dilakukan secara mandiri. [The Opportunities of Smart City Development to Realize the Resilient City in Semarang (Case Study: Flood Early Warning System in Beringin Sub-Drainage] City of resilience become to a new metaphor that debated by researcher and urban planner to manage its city in order to ensure sustainability. This concept suggests 2 conceptual frameworks: equilibrium or isolation model and non-equilibrium model. The differences of both models are the way of city to adapt from disturbance. In equilibrium model, urban system must own end point or terminal as city orientationor goal. If any gap between planning document and development result, urban planner has to restore the development process into its plan or end point. On the other hand, non-equilibrium model offers adaptation system. In non-equilibrium perspective, resilience is the ability of an urban system to adapt and adjust to changing internal or external processes. There is a new necessity to manage city i.e. quick response, adequate data and correct according real time data. Smart City offers a solution to provide real time data and bridging between top-down intervention and bottom-up participation. Smart city doesn’t only provide information system and technology, yet its concept can support intellectual capital. This article used literature study through compare 2 conceptual theoretical framework i.e. smart city and resilience city. From this discuses found out that smart city can support city to be resilience with early warning system. This system can improve human ability to know a circumstance and action to evacuation.   Diponegoro University 2015-07-04 16:42:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/7823 TEKNIK; Vol 36, No 1 (2015): (Juli 2015) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1691 2012-02-10T07:42:07Z teknik:ART

2460-9919 0852-1697 dc KAJIAN ASPEK HUKUM INTERNASIONAL PADA KASUS TUMPAHAN MINYAK KAPAL TANKER EXXON VALDES Ariany, Zulfaidah Accidents on boats Losses; International Law. The ships operation can occur a lot of possibilities accidents which caused a fatal accident, affect to the damagethe cargo and crew, and also on the environment that may affect to the industry and coastal beaches, and thecontinuity of living things around it. This paper tried to make the consideration that always vigilant andanticipated the occurrence of ships accidents at seas. Tanker Vessel Exxon Valdes cause huge losses in history,so the author interested to discuss in the light of international legal studies. At the end of this paper we’ll belearned the engaged the shipping and their best frame works, the society, and the nation, especially for the State Diponegoro University 2012-02-02 14:47:08 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1691 TEKNIK; Volume 32, Nomor 1, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/25328 2020-07-10T16:19:10Z teknik:ART

"200531 2020 eng " 2460-9919 0852-1697 dc Study of the Effect of Bulb Ratio and Blade Angle on Propeller Turbine Performance in Horizontal Flow using Numerical Simulation Nurdin, Akhmad Departement of Mechanical Engineering, Sebelas Maret University http://orcid.org/0000-0002-6263-8419 Himawanto, Dwi Aries Departement of Mechanical Engineering, Sebelas Maret University Hadi, Syamsul Departement of Mechanical Engineering, Sebelas Maret University bulb ratio; blade angle; propeller; turbine; static bulb; solidworks This paper discusses numerical simulations of horizontal flow propeller turbines. Static bulbs located before the turbine can be used to increase water velocity and potentially increase the turbine's performance. The blade angle affects the gap between the blades, and this will also affect the performance of the turbine. Numerical simulations were conducted by using software Solid Works Flow Simulation 2016 and by using five blades in a static state. This study aimed to determine the effect of the bulb ratio and blade angle on the propeller turbine characteristics on horizontal flow. Bulb Ratio variations used in this study were 0, 0.4, 0.6, and 0.8, while the angle variations used were 20, 25, and 30 degrees. Each variation was tested at 0.02 m3/second. The results of this study indicated that the bulb ratio 0.6 with the 25-degree blade angle produces the highest torque Diponegoro University 2020-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/25328 TEKNIK; Vol 41, No. 1 (2020): May 2020 eng Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2076 2012-02-22T03:22:05Z teknik:ART

2460-9919 0852-1697 dc PEMANFAATAN ECENG GONDOK (EICHHORNIA CRASSIPES (MART.) SOLMS.) DALAM PENYISIHAN LOGAM BERAT CHROM (CR) PADA LIMBAH ELEKTROPLATING Sumiyati, Sri Hadiwidodo, Mochtar water hyacinth, waste, electroplating, chrome. Effluent that is produce by the electroplating industry, especially nickel chrome plating, contains chromemetal that is carcinogenic. The toxicities from chrome are caused by its ability to dissolve and it’s mobilityin the environment. An alternative treatment to reduce chrome is called fitoremediasi which uses plants asits indicator; in this case we use water hyacinth.At the preface experiment, we tried to plant mature water hyacinth in electroplating waste. First we tried toplant in 100% waste water in witch we repeated it 3 times. At the 3rd week; day 18; the plants becameyellowish and became wilted. Knowing this fact, we applied the time for our experiment the we were goingto executed, with assuming at the 18th day the plants will become wilted as an indicator that the waterhyacinth are saturated in adsorbing chrome as the heavy metal pollutant. This became the parameter indesigning the time treatment for the plant zone, 4 until 15 days.The treatment was done by making variation in the amount of plants that are planted, which was 0 plants(as the control), 1 plant, 2 plants, 3 plants, and 4 plants; with 3 times repeating at each stage. The result ofthis experiment after 18 days shows the chrome concentration and the efficiently in decreasing theconcentration on each stage. The highest efficiently for each plant was the treatment by 1 plant only. Thehighest efficiently in decreasing the concentration was 78,95% ad it was done by the treatment with 4plants. To get chrom concentration which is fill with the standard, we can add more water hyacinth into thewaste with the balance equivalent or we need the lower beginning concentration. Diponegoro University 2012-02-10 11:26:10 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2076 TEKNIK; Volume 28, Nomor 1, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/55135 2023-10-12T21:21:38Z teknik:ART

"230830 2023 eng " 2460-9919 0852-1697 dc Analysis Of The Effect Of Side Hull Position On Rolling Motion Characteristics On Trimaran Ship Amiruddin, Wilma Department of Naval Architecture, Universitas Diponegoro Yudo, Hartono Department of Naval Architecture, Universitas Diponegoro https://orcid.org/0000-0002-6491-3365 side hull; trimaran; rolling motion; synchronism Modifikasi kapal ikan menjadi kapal trimaran akan memperluas geladak kapal. Pada proses modifikasi ini, posisi side hull akan memberikan pengaruh terhadap karakteristik rolling motion kapal. Penelitian ini bertujuan untuk menganalisis pengaruh posisi side hull terhadap karakteristik rolling motion. Sinkronisasi gelombang dapat menyebabkan terjadinya ayunan yang besar pada kapal. Pada penelitian ini terdapat dua model kapal yang dianalisis, yakni model kapal 1 (10 m x 12 m), dan model kapal 2 (12 m x 10 m). Analisis dilakukan berdasarkan perhitungan hidrostasis dengan menggunakan Delftship dan perubahan energi dengan pendekatan teori gelombang Trochoidal Curve. Hasil analisis menunjukkan semua model berpeluang besar untuk mendapatkan kondisi sinkronisasi. Hal ini disebabkan karena nilai periode rolling kapal (T) menjadi jauh lebih kecil dari pada nilai periode usikan gelombang (Te). Posisi side hull tidak memberikan pengaruh signifikan pada model untuk displasemen tetap. Model kapal 1 memiliki nilai periode rolling sebesar 2,4 dt dan model kapal 2 memiliki nilai periode rolling kapal sebesar 2 dt. Nilai ini jauh di bawah nilai periode rolling dari kapal monohull sebelum modifikasi (T) yakni sebesar 6 dan batas minimal untuk kapal ikan (T) sebesar 5,5 dt. Perubahan ini menghasilkan karakteristik ayunan melintang atau rolling motion yang cukup besar. Diponegoro University 2023-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/55135 TEKNIK; Vol. 44, No. 2 (2023): August 2023 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/55135/176976 Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/9373 2020-04-17T09:31:53Z teknik:ART

"161231 2016 eng " 2460-9919 0852-1697 dc Pengembangan Transportasi Sungai Kota Semarang Sebagai Transportasi Perintis Tujuan Wisata Air (Studi Kasus Kanal Banjir Barat Kota Semarang) Ismiyati, Ismiyati Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Budieny, Hary Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Narayudha, Moga Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Salamun, Salamun Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Putra, Anggara Dharma Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Wiweka Reka, Wiweka Reka Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, biaya operasional kapal; kanal banjir barat; pariwisata sungai; tarif; ship operating cost; floods canal west; river tourism; water tourism; tariff Perkembangan pariwisata di kota Semarang ditandai dengan tersedianya fasilitas shuttle bus gratis. Rute shuttle bus tersebut melewati rute Kuliner Pekunden, Pusat oleh-oleh Pandanaran, Gedung Lawang Sewu dan Daerah Kota Lama Semarang.Sejak tahun 2012, wisata di tepi Sungai Kanal Banjir Barat mulai dikembangkan pemerintah Kota Semarang. Namun, sampai saat ini Kanal Banjir Barat hanya difungsikan sebagai sungai pengendali banjir, sehingga fungsi pariwisatanya belum optimal seperti objek wisata lain di Kota Semarang. Tujuan dari penelitian ini adalah untuk mengembangkan transportasi wisata air, khususnya di Kanal Banjir Barat. Penelitian ini menggunakan metode deskriptif dengan kuesioner dan observasi lapangan. Metode kuantitatif penentuan alur pelayaran menggunakan analisis hidrologi dan simulasi hidrolika sungai dengan program HEC-RAS. Penelitian ini merekomendasikan bahwa lokasi pengembangan transportasi untuk wisata air di Kanal Banjir Barat akan efektif jika berada diantara Bendung Simongan hingga muara Kanal Banjir Barat. Tipe angkutan wisata yang ideal adalah menggunakan 2 kapal speedboat terbuka dengan dimensi panjang 8 m, lebar 2,2 m, dan draft 0,4 m. Biaya Operasional Kapal per tahun untuk 8 trip per hari dan biaya pengelolaannya adalah sebesar Rp 901,2 juta dengan estimasi tarif per orang sebesar untuk Rp 17.070,- per trip.  [Title: River Transportation Development of Semarang City for Water Tourism: A Case Study West Flood Canal] Tourism development of Semarang city is identified by the facilities of free shuttle bus. The shuttle bus service passes through Pekunden culinary route, a central souvenir of Pandanaran, Lawang Sewu and Old City of Semarang. Since 2012, local government has developed riverside tourism object of the West Flood Canal Semarang. However, until then the West Flood Canal only was functioned as flood control. Thus, the tourism function is not optimum as other tourism attractions in Semarang city. This research aims to develop the water tourism transportation, especially in the West Flood Canal. This research uses a descriptive method by questionnaires and field observations. Quantitative methods of determining ship channel using hydrological analysis and simulation of river hydraulics with HEC-RAS program. This study recommends that the location of the development of transportation of water tourism in the West Flood Canal would be effective if it is located in between the estuary of Simongan weir to the West Flood Canal. The ideal type of transport mode uses two open speedboats with dimensions of 8 m length, 2.2 m width, and a draft of 0.4 m. Ship Operating Costs per year for eight trips per day and its management fee is Rp 901.2 million with the estimated fare per person about USD 17.070, - per trip.  Diponegoro University 2016-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/9373 TEKNIK; Vol 37, No 2 (2016): (Desember 2016) eng Copyright (c) 2016 Teknik

oai:ojs.ejournal.undip.ac.id:article/1752 2012-02-15T04:03:20Z teknik:ART

2460-9919 0852-1697 dc PENYELIDIKAN OPERASI PINTU INTAKE EMBUNG SAMIRAN DENGAN UJI MODEL HIDROLIK Kurniani, Dwi Kirno, Kirno Manual gate operation intake. A manual of intake gate operation for embung is an important tool it depends. One factor which is decidingthe manual is operation of gate system. If the system of gate operation of intake gate are wrong will havenegative water use . To make the most precise of manual operation of intake gate embung Samiran must beendone physical model test. From this test result of physical model test can be used as a guidance or referenceprototype application. Diponegoro University 2012-02-02 14:41:15 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1752 TEKNIK; Volume 31, Nomor 1, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/29687 2021-06-03T02:06:52Z teknik:ART

"210503 2021 eng " 2460-9919 0852-1697 dc Design of Monitoring Battery Solar Power Plant and Load Control System based Internet of Things Alfita, Riza Jurusan Teknik Elektro, Fakultas Teknik, Universitas Trunojoyo Madura Joni, Koko Jurusan Teknik Elektro, Fakultas Teknik, Universitas Trunojoyo Madura Darmawan, Fajar Dwika Jurusan Teknik Elektro, Fakultas Teknik, Universitas Trunojoyo Madura Internet of Things; monitoring; control; power; solar power plant Teknologi Internet Of  Things dalam penelitian ini dimanfaatkan pada Pembangkit Listrik Tenaga Surya (PLTS) (Studi Kasus : Prodi Teknik Elektro Universitas Trunojoyo Madura) sebagai sistem monitoring daya baterai dan kontrol beban. Semua sistem tersebut dibangun dengan tujuan mempermudah pengguna dalam mengelola konsumsi daya yang digunakan sekaligus mencegah kerusakan baterai sehingga masa pakai baterai dapat bertahan lebih lama dan penggunaan PLTS menjadi lebih optimal. Semua sistem tersebut dirancang menggunakan beberapa komponen yang saling terintegrasi dengan fungsi masing-masing seperti Raspberry sebagai pengolah data, smartphone sebagai interface, dan sensor aktuator sebagai input output. Dari hasil pengujian akurasi monitoring didapatkan nilai error rata-rata sebesar 1,56 %. Setelah memastikan sistem memiliki tingkat akurasi yang tinggi, dilakukan pengujian charge-discharge secara real time selama 7 hari yang menunjukan bahwa sistem bekerja sesuai tujuan penelitian yang dibuktikan dengan tidak adanya penggunaan daya melebihi batas standar SOC baterai yang digunakan sebesar 30%. Sedangkan untuk pengujian sistem kontrol didapatkan bahwa koneksi wifi memiliki rata-rata delay paling cepat selama 10,30 s, provider A 11,17 s, dan provider B 12,60 s. Diponegoro University 2021-05-03 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/29687 TEKNIK; Vol. 42, No. 1 (2021): May 2021 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/29687/86230 Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4382 2013-01-22T02:50:02Z teknik:ART

"121015 2012 eng " 2460-9919 0852-1697 dc LIKUIFASI ENZIMATIK β - KAROTEN SEBAGAI FUNCTIONAL FOOD YANG TERDAPAT DALAM POMACE DARI BUAH LABU KUNING Herry, Santosa Heny, Kusumayanti Array Attempts to separate the β carotene contained in pomace or pulp byproduct pumpkin fruit juicing process (Cucurbitae moschata) is potential. The magnitude of benefit of β-carotene as a chemo preventive, high content of β-carotene in pumpkin, strong pumpkin fruit shelf life and high content of β-carotene in the pomace, an initial consideration of this research. β-Carotene enzmatik liquefaction using pectinase enzyme combination (P) and cellulose (C), subject to the pomace. liquefaction / hydrolysis carried out in a stirred tank reactor to determine: the most influential variable ratio between enzyme ratio P: C; temperature and pH. Influential process variables was determined using two-level factorial design method Quicker. From the experimental results of the data if it is known that the degree of acidity of pH is the single most influential variable in the process of β-carotene liquefaction presents in pumpkin fruit pomace. Diponegoro University 2012-07-12 10:30:29 https://ejournal.undip.ac.id/index.php/teknik/article/view/4382 TEKNIK; Volume 33, Nomor 2, Tahun 2012 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/53913 2025-04-17T01:00:27Z teknik:ART

"240830 2024 eng " 2460-9919 0852-1697 dc Impact of Marble Ash on the Shear Strength of Clay Soil Waruwu, Aazokhi Program Studi Teknik Sipil, Universitas Pelita Harapan https://scholar.google.co.id/citations?user=KoskFWAAAAAJ&hl=id&oi=sra https://orcid.org/0000-0002-2321-7195 Setiawan, Calvien Tantono, Clarissa Boediono, Mario Endrico soil stabilization; marble ash; shear strength; angle of internal friction Tanah merupakan suatu bagian terpenting dalam struktur bangunan karena memiliki fungsi sebagai penopang dari bangunan. Kestabilan tanah harus diperhatikan agar konstruksi bangunan aman dan tahan lama. Jenis tanah lempung ada yang memiliki nilai plastisitas yang tinggi dan kuat geser yang rendah. Tanah seperti ini memerlukan stabilisasi dengan penambahan bahan tambah seperti abu marmer. Tujuan penelitian ini adalah untuk mengetahui penambahan kadar abu marmer yang memberikan dampak optimal dalam memperbaiki sifat plastisitas, kepadatan, dan kuat geser. Bahan tambah yang digunakan adalah abu marmer dengan kadar 3%, 6%, 9%, dan 12% dari berat tanah kering. Benda uji dibedakan berdasarkan umur pemeraman sebelum diuji dengan triaksial. Berdasarkan dari hasil penelitian didapatkan bahwa penggunaan abu marmer memberikan dampak maksimal dalam memperbaiki sifat plastisitas dan kepadatan maksimal pada penambahan sebanyak 6%. Hal ini diikuti dengan peningkatan kuat geser yang signifikan pada penambahan yang sama. Umur pemeraman yang baik dalam meningkatkan sudut gesek dalam tanah didapatkan pada 14 hari. Diponegoro University 2024-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/53913 TEKNIK; Vol 45, No 2 (2024): August 2024 ind Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/17100 2020-04-17T09:35:17Z teknik:EI

"171229 2017 eng " 2460-9919 0852-1697 dc Front-matter Jurnal Teknik, Ketua Editor Departemen Teknik Elektro Universitas Diponegoro, Indonesia teknik; jurnal teknik Artikel editorial ini berisi front-matter jurnal Teknik Volume 38 Nomor 2 Tahun 2017, yaitu meliputi halaman sampul, fokus dan ruang lingkup Teknik, informasi indeksasi, susunan tim penyunting dan mitra bebestari, kata pengantar editor dan daftar isi. Diponegoro University 2017-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/17100 TEKNIK; Vol 38, No 2 (2017): (Desember 2017) eng Copyright (c) 2018 Teknik

oai:ojs.ejournal.undip.ac.id:article/1865 2012-02-15T03:26:54Z teknik:ART

2460-9919 0852-1697 dc PEMBUATAN PUPUK FOSFAT DARI BATUAN FOSFAT ALAM SECARA ACIDULASI Setia Budi, Faleh Purbasari, Aprilina acidulation, phosphate fertilizer, spraying Phosphate rock containing P2O5 can be used as raw material of phosphate fertilizer. Phosphate rock canbe found in many areas in Indonesia, but its P2O5-content is relative low. In this research, phosphate rockfrom Rembang (P2O5-content 11.37%) is used as raw material for phosphate fertilizer production byacidulation process using phosphoric acid solution. Operation variables are phosphoric acid concentration(10, 20, 30, 40 %-vol), spraying model of phosphoric acid solution (one hole and many holes), andspraying position of phosphoric acid solution (end, centre, end & centre). The result shows that theincrease of phosphoric acid concentration is proportional to P2O5-content in phosphate fertilizer withhighest P2O5-content in the amount of 18.29%. One-hole spraying model and end-position spraying giveshighest phosphate fertilizer yield in amount of 169.5 grams. Diponegoro University 2012-02-02 14:36:47 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1865 TEKNIK; Volume 30, Nomor 2, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/35821 2021-12-16T21:29:52Z teknik:ART

"211217 2021 eng " 2460-9919 0852-1697 dc Laksono, FX Anjar Tri Teknik Geologi, Fakultas Teknik, Universitas Jenderal Soedirman http://sinta.ristekbrin.go.id/authors/detail?id=6691807&view=overview http://orcid.org/0000-0002-6061-6136 Kusdiantoro, Fendy Kovács, János Purnomo, Widhiatmoko Herry Sub-Cekungan Tarakan yang terletak di Provinsi Kalimantan Utara diperkirakan memiliki potensi hidrokarbon sekitar dua miliar barel oil equivalent (BOE). Tujuan dari penelitian ini adalah menganalisis kematangan batuan induk dan potensi hidrokarbon di Formasi Naintupo, Sub-Cekungan Tarakan. Metode yang digunakan dalam kajian ini adalah analisis Total Organic Carbon (TOC), Vitrinite Reflectance (Ro), Hydrogen Index (HI), Tmax, Potential Yield (PY), S1, Oxygen Index (OI), dan Oil Production Index (OPI). Hasil kajian ini adalah Formasi Naintupo merupakan batuan induk efektif menghasilkan hidrokarbon dengan nilai TOC antara 1,02-5,92 wt.%, HI 52-115 mgHC/gr TOC, Ro 0,62%-1,84%, Tmax 436oC-468oC, S1 0,17-0,32, dan OPI sebesar 0,15-0,4. Jenis hidrokarbon dengan potensi terbesar adalah gas bumi. Potensi gas bumi terbesar berada di Sumur South Sembakung-1, Tanjung Bimau-1, Sesayap E-1, dan Tanjung Kramat-1. Hasil analisis menunjukkan bahwa Formasi Naintupo berpotensi menghasilkan gas bumi di Sub-Cekungan Tarakan. Diponegoro University 2021-12-17 04:29:52 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/35821 TEKNIK; Vol 42, No. 3 (2021): December 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/6721 2014-12-24T02:20:43Z teknik:ART

"131203 2013 eng " 2460-9919 0852-1697 dc PERENCANAAN KAPASITAS PEMBANGKIT PLTM SUNGAI LOGUNG KARANGTALUN KABUPATEN TEMANGGUNG Nugroho, Agung Staf Pengajar Jurusan Teknik Elektro Fakultas Teknik Universitas Diponegoro Array Central Java Province intends to improve the use of renewable energy (EBT) such as water resources. Logung river at Ngaliyan subdistrict, Temanggung district has potential energy for micro power plan. The first step to use the water resource is determining the capacity of a mini hydro power plan in accordance with the conditions of the river Logung. Based on the the technical study, the elvation height between the prospective weir with potential power house is 110 m and the effetive height at 105 m. Logung maximum river flow is 11.06 m3/dt, with average flow is 4,77 m3/dt., The minimum flow is 0,75 m3/dt. This electricity power is 10253.12 KW with maximum flow, it will be produced 4848.44 KW at maximum flow 60 %. The minimum flow can deliver 695,28 KW. The suitable capacity for the generator of micro power plants of Logung is 3220 KVA when it is according to manufacture. Key words : power, flow, power Diponegoro University 2013-12-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/6721 TEKNIK; Volume 34, Nomor 3, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67676 2025-07-07T19:46:40Z teknik:TE

"250322 2025 eng " 2460-9919 0852-1697 dc Sulistyo, Khansa Praningdita Departement of Industrial Technology, Vocational School, Diponegoro University, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275|Universitas Diponegoro Salbina, Firda Cahya Rahma, Azelia Anisa Currently, fuel oil is a primary natural resource in the transport sector. However, the availability of fossil fuels is shrinking while the demand for fuel is rising. Expired bread is not worthy of consumption and is often discarded without being used as something more economical and environmentally friendly.   Therefore, the study aims to convert bread waste into bioethanol (C2H5OH) as a gasoline mixture that can reduce emissions of pollutants such as carbon monoxide (CO) and potentially improve air quality. These bioethanol products will create energy security, reducing dependence on a single energy source.   Bread waste serves as a substrate with an apple peel catalyst. This method of making bioethanol is through fermentation assisted by Saccharomyces cerevisiae with the addition of urea fertilizer as a nutrient. The multistage distillation column is equipped with hydrophobic material to help the separation process. The results of this study show that bioethanol from expired bread waste is worthy of being used as a gasoline mixture for motor vehicle fuel. The ethanol produced is directly proportional to the amount of bread waste, but there is still a maximum limit. The time variations used are 24 hours, 48 hours, and 72 hours.   Based on this study, the optimal condition of Saccharomyces cerevisiae works at a temperature range of 30-35°C with a pH of 4-6. Diponegoro University 2025-02-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67676 TEKNIK; Vol 46, No 1 (2025) January 2025 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/67676/223346 Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/23390 2020-04-17T09:39:43Z teknik:ART

"190531 2019 eng " 2460-9919 0852-1697 dc Improvement The Compressive Strength and Flexural Strength of Concrete by Adding Variations of Pineapple Leaf Fibers Yanti, Gusneli http://sinta2.ristekdikti.go.id/authors/detail?id=6149459&view=overview Zainuri, Z. http://sinta2.ristekdikti.go.id/authors/detail?id=6026878&view=overview Megasari, Shanti Wahyuni http://sinta2.ristekdikti.go.id/authors/detail?id=6024196&view=overview concrete; Department of Environment; flexural strength; compressive strength; pineapple leaf fibers Beton merupakan bahan bangunan yang banyak dipergunakan, dikarenakan bahan ini kuat terhadap tekan dapat dengan mudah dibentuk menyesuaikan dengan kebutuhan. Di sisi lain beton mempunyai kelemahan terhadap lentur serta mempunyai sifat getas, sehingga diperlukan metode untuk memperbaiki kelemahan tersebut. Salah satu upaya untuk meningkatkan kuat tarik beton dilakukan dengan penambahan serat, sehingga menjadi suatu bahan komposit yaitu beton dan serat. Penelitian ini bertujuan untuk meningkatkan kuat tekan dan kuat lentur beton dengan variasi penambahan serat sebesar 0%, 1%, 3%, 5%, dan 7% terhadap berat semen pada mutu beton K-225. Perancangan beton menggunakan metode Department of Environment (DOE), dengan cetakan silinder berukuran 150 mm x 300 mm Jumlah sampel pada setiap penambahan serat sebanyak 3 sampel dan total sebanyak 30 sampel. Hasil pengujian menunjukkan nilai kekuatan tekan dan lentur beton tertinggi untuk  variasi  dengan tambahan serat daun nanas sebesar 5 % dengan nilai kuat tekan rata-rata 267,00 kg/cm2 dan nilai kuat lentur rata-rata 41,61 kg/cm2. Diponegoro University 2019-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/23390 TEKNIK; Vol 40, No. 1 (2019): Mei 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1932 2012-08-08T06:08:29Z teknik:ART

2460-9919 0852-1697 dc KRITIK TERHADAP PENYEDIAAN RUANG BAGI WANITA DALAM PERUMAHAN REAL-ESTATE Bharoto, Bharoto women, women’s spatial use, real-estate developer One of gender issues in architecture is domesticity, space in a home. According to feminist perspectivehome spatial design must be consider women’s spatial use for housework activities. Preliminaryresearch shows that mothers of a household tend to use kitchen, living room, and master bedroom intheir everyday activities so there must be connectedness appearance among those spaces. In fact, homedesign in Indonesia pays less attention to it. This research aimed to find out how far real-estatedeveloper accommodates the women’s spatial use for housework activities on their products. Data isobtained from 81 real estate advertisements on newspaper. The data is treated by content analysis tofind the offering items on the advertisement. The result show that 19% real- estate developers use facilityof housing and environment as superiority on their products and only 3.5% of them use householdspatial needs. It can be concluded that home design in Indonesia pay less attention to women’s spatialuse for housework activities Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1932 TEKNIK; Volume 29, Nomor 2, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1681 2012-02-10T07:42:07Z teknik:ART

2460-9919 0852-1697 dc STRATEGI PERBAIKAN - PENGGANTIAN BERDASARKAN UMUR PRODUK UNTUK GARANSI SATU DIMENSI Ika Rinawati, Dyah One-dimensional warranty, warranty servicing strategy, repair-replace strategy When the manufacturer selling products with warranties, it causes additional costs (called warranty costs) toservice any claims under warranty. Reducing warranty costs is an issue of great interest to manufactures. Thethree ways to reduce warranty costs i.e. improving product reliability, use of preventive maintenance andwarranty servicing strategy.This research deals with a warranty servicing strategy for items sold with a one dimensional warranty where theperiod offered is relatively long. For instance, a computer warranted for three years. For repairable productssold with free repairable warranty (FRW), the manufacturer has the option of either repairing or replacing thefailed item with a new one.In the strategy studied, the decision of repairing or replacing the failed item under warranty is based on its ageat failure. Under the strategy, for failures with age being greater than or equal to threshold parameter will berectified by replacement and all other failures under warranty will be repaired. This strategy is characterized bya threshold parameter which minimizes the expected warranty cost. The optimal parameter is sought by usingnumerical computation. Some numerical examples are given for the purposes of illustration. Diponegoro University 2012-02-02 14:47:08 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1681 TEKNIK; Volume 32, Nomor 1, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/28561 2020-03-17T01:25:53Z teknik:EI

"191231 2019 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi front-matter jurnal Teknik Volume 40 Nomor 3 Tahun 2019, yaitu meliputi halaman sampul, fokus dan ruang lingkup Teknik, informasi indeksasi, susunan tim penyunting dan mitra bebestari, kata pengantar editor dan daftar isi. Diponegoro University 2019-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/28561 TEKNIK; Vol 40, No. 3 (2019): Desember 2019 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2035 2012-02-21T03:42:53Z teknik:ART

2460-9919 0852-1697 dc TEKNOLOGI PEMETAAN DIGITAL UNTUK PENGEMBANGAN KAWASAN PEMUKIMAN PERUMAHAN ( STUDI KASUS : BUKIT SEMARANG BARU- SEMARANG) D Yuwono, Bambang Hani’ah, Hani’ah digital mapping, housing In recent years the requirement of housing have been growing, such growth of population requires theimprovement of quality and quantity. As consequence, the developer which has responsible for this, shouldincrease and apply the enhanced technology. BSB is one of the biggest developer in Central Java hadapplied the digital mapping as solution for developing area.This research is purposed to study and evaluate application of digital mapping for developing housingcoverage area. The study is started from the fact that with using conventional tool of measurement can nothandle the project which need speed, accurate manage data to develop area. .Using digital mappingControlling and maintaining data more easily and Accurate. Diponegoro University 2012-02-10 11:26:10 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2035 TEKNIK; Volume 28, Nomor 1, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/49522 2023-06-25T22:39:35Z teknik:ART

"230531 2023 eng " 2460-9919 0852-1697 dc Kurniawan, Iwan Department of Civil Engineering,Universitas Mercu Buana, Jl. Meruya Selatan Kembangan Jakarta Barat 11650 Husin, Albert Eddy Pembangunan bangunan pabrik yang menerapkan konsep Green sangat dibutuhkan, hal ini sesuai misi dari Sustainable Development Goals 2030, bahwa pada tahun 2030 bangunan baru berkonsep green sebesar 100% dan bangunan eksisting sebesar 60%. Penelitian ini bertujuan untuk menganalisis faktor-faktor yang berpengaruh dalam penerapan Konsep Green terhadap Kinerja Biaya Berbasis Value Engineering dan Life Cycle Cost Analysis dengan mengambil objek pada Bangunan Utama Flour Mill Plant dengan menggunakan metode Structural Equation Modelling – Part Least Square (SEM-PLS). Dari penelitian tersebut terdapat 10 faktor yang paling berpengaruh, yaitu; Performance proyek manajer dengan tingkat pengaruh 88,4%, Perhitungan efisiensi energi dengan tingkat pengaruh 88,1%, Spesifikasi teknis dengan tingkat pengaruh 86,8%, Penyediaan lahan parkir dengan tingkat pengaruh 84,6%, Aturan pendukung dengan tingkat pengaruh 82,8%, Sumber air dengan tingkat pengaruh 82,2%, Fungsi analisis dengan tingkat pengaruh 80,6%, Penerapan sistem penangangan sampah dengan tingkat pengaruh 75,9%, Pemilihan material alternatif 73,1%, dan Biaya energi dengan tingkat pengaruh 72,4%. Diponegoro University 2023-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/49522 TEKNIK; Vol. 44, No. 1 (2023): May 2023 ind Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/8695 2020-04-17T09:30:54Z teknik:ART

"160730 2016 eng " 2460-9919 0852-1697 dc Rancang Bangun Mesin Pengolah Limbah Kain dan Kertas Sebagai Bahan Industri Eternit Dahlan, Mohammad Jurusan Teknik Elektro, Fakultas Teknik, Universitas Muria Kudus, Kampus UMK Gondangmanis PO.BOX 53, Kudus Winarso, Rochmad Jurusan Teknik Elektro, Fakultas Teknik, Universitas Muria Kudus, Kampus UMK Gondangmanis PO.BOX 53, Kudus Slamet, Sugeng Jurusan Teknik Elektro, Fakultas Teknik, Universitas Muria Kudus, Kampus UMK Gondangmanis PO.BOX 53, Kudus waste; plasterboard industry; cloth and paper processing; limbah; industri eternit; pengolah kain dan kertas Di Kabupaten Kudus, saat ini berkembang UMKM dalam usaha pembuatan eternit. Bahan baku pembuatan eternit terdiri ini terdiri dari semen dan serat kain. Disatu sisi, di Kabupaten Kudus banyak tumbuh sentra-sentra industri garment seperti di desa Langgar Dalem, Loram Wetan, Loram Kulon, Megawon, Klumpit, Undaan dan masih banyak lagi yang menghasilkan limbah kain tidak termanfaatkan. Untuk itu diperlukan inovasi dalam memanfaatkan bahan baku yang melimpah tersebut guna memenuhi UKM pembuatan eternit. Tujuan dari penelitian ini adalah merancang bangun mesin pengolah limbah kertas dan kain menjadi bahan baku eternit untuk produksi UKM eternitdengan kapasitas 1200 gr/putaran. Tenaga penggerak menggunakan motor listrik 6 PK, 3 phase putaran 1400 rpm, sehingga kapasitas maksimal mesin crusher sebesar 120 kg/jam. Metode yang digunakan dalam penelitian ini adalah: 1) melakukan survey ketersediaan bahan baku berupa sampah kain/kertas, serta menganalisa kualitas serat penguat bahan baku. 2) merancang desain dari mesin pengolah limbah kain/kertas, 3) menentukan kebutuhan komponen serta kesiapan laboratorium pendukung yang akan digunakan untuk membuat mesin tersebut. 4) pengujian mesin yang telah dirancang. Telah dirancang mesin pengolah limbah kertas dan kain dengan kapasitas mesin crusher sebanyak 1200 gr/putaran, sebagai bahan baku eternity untuk meningkatkan kapasitas produksi industry eternit. Direncanakan kemampuan tenaga penggerak menggunakan motor listrik 6 PK, 3 phase putaran 1400 rpm, sehingga kapasitas maksimal mesin crusher sebesar 120 kg/jam. [Title: Machine Design of Cloth Fiber and Paper Wastes Conversion to Plasterboard]. Nowadays, UMKM industry producing plasterboard has been being developed in Kudus regency. The raw material used in producing plasterboard consists of cement and cloth fiber. On the other hand, there are also many garment industries developed in Langgar Dalem, Loram Wetan, Loram Kulon, Megawon, Klumpit, Undaan and many more which result in cloth waste. Therefore, innovation is needed to make use of those abundant raw material in order to fulfil the need of UKM in producing plasterboard. This research is aimed at designing a model of a processor machine for processing cloth and paper waste into basic material for producing plasterboard, with capacity of 1200gr / round. This machine’s propulsion uses 6 PK elcetric motor, 3 round phases 1400 rpm, so that the maximum capacity of the crusher machine will be 120 kg / hour. The research methods used are: 1) doing survey on raw material supply, includes cloth or paper waste, and analysing the quality of their fiber; 2) designing a model of a processor machine for cloth and paper waste; 3) determining what components are needed as well as the the readiness of supporting laboratory which will be used to build the machine; 4) testing the machine once it is built. This machine is used as a basic tool to produce plasterboard. With this machine, it is expected that the plasterboard production will increase significantly. This machine’s propulsion is designed to use 6 PK electric motor, 3 round phases 1400 rpm, so that the maximum capacity of the crusher machine will be 120 kg / hour. Diponegoro University 2016-07-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/8695 TEKNIK; Vol 37, No 1 (2016): (Juli 2016) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1742 2012-02-10T06:29:29Z teknik:ART

2460-9919 0852-1697 dc KAJIAN KARAKTERISTIK DAS TUNTANG DAN MODEL PENGELOLAAN DAS TERPADU Sriyana, Sriyana Characteristics, Watershed of Tuntang, Integrated Management. A low carrying capacity of drainage basin or watershed may cause several problems, where floods occur inrainy season and droughts occur in dry season, also the occurrence of erosion, sedimentation and so on, hasbeen government’s problem in watershed management all along. In order to anticipate this condition,characteristic data of a watershed are required, so that it can be used as basic reference of watershedmanagement.The purpose of this paper is to conduct a study on the characteristics of Tuntang watershed of Central JavaProvince and watershed management model.The method of approach uses aspects of watershed geomorphology such as the shape of watershed, elongationratio and circularity ratio approaches, order of river using Strahle method, watershed density using Lynsleyformula, and river gradient calculated based on the comparison between elevation difference and length of mainrivers.Results show that magnitude index of Tuntang Sub watershed has elongated shape with Rc value between 0.27 to0.46, which means that the longer concentration time needed, the lower flood fluctuation. And relatively roundedshape with Rc value between 0.57 to 1.00, which means that the shorter concentration time needed, the higherflood fluctuation occurs. Sub watershed order range from 4 to 6 order, which means that river basins have floodwater level increase (moderately quick to fast), likewise water level decrease. Level slope between 0 - 8 % (lowflow velocity) with an area of 117605.56 Ha, and very steep slope > 40 % (very high flow velocity) with an areaof 4219.09 Ha. The highest drainage density occurs in Sub watershed of Tuntang downstream 1.88 Km / Km²,and lowest Sub watershed of Blorong 1.01 Km / Km². Based on both magnitudes, the water being stored is inmedium category and floods and droughts occur. The flow pattern has the shape of rectangular dendritic anddendritic medium, showing that soil characteristics is limestone and shale. To obtain optimal performance resultof Tuntang watershed, integrated watershed management program is needed in watershed managementintegration by involving various associated parties. Diponegoro University 2012-02-02 14:47:46 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1742 TEKNIK; Volume 32, Nomor 3, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/33416 2021-05-06T06:54:02Z teknik:ART

"201128 2020 eng " 2460-9919 0852-1697 dc Mechanical Ventilation Control Based on Estimated occupancy using a Carbon Dioxide Sensor Rahman, Haolia Department of Mechanical Engineering, Jakarta State Polytechnic https://mesin.pnj.ac.id/news/index/2042 http://orcid.org/0000-0002-3414-7225 Sukandi, Agus Department of Mechanical Engineering, Jakarta State Polytechnic Nasruddin, Nasruddin Faculty of Engineering, Padang State University Arnas, Arnas Faculty of Engineering, Padang State University Lapisa, Remon Faculty of Engineering, Padang State University occupancy estimation; ventilation control; Bayesian MCMC; carbon dioxide, mass balance equation Ventilasi merupakan unsur penting untuk menjaga kualitas udara yang baik di dalam sebuah bangunan. Namun, penggunaan ventilasi yang berlebihan menyebabkan tingginya konsumsi energi dari sistem HVAC. Standar ASHRAE telah memberikan aturan bahwa laju ventilasi tergantung dari banyaknya penghuni dan luas ruangan di dalamnya. Oleh karena itu kuantifikasi populasi penghuni perlu diketahui sebagai acuan sebuah kontrol ventilasi. Pada penelitian ini, jumlah penghuni diestimasi menggunakan metode Bayesian MCMC berdasarkan level CO2 di dalam ruangan. Persamaan kesetimbangan massa CO2 digunakan sebagai model perhitungan Bayesian MCMC. Pengujian metode Bayesian dalam mengestimasi jumlah penghuni diaplikasikan pada sebuah ruangan kantor skala kecil berukuran 96,7 m3 yang dilengkapi dengan sistem ventilasi, sehingga estimasi penghuni dan kontrol ventilasi dapat dilakukan secara bersamaan. Pengujian juga mencakup kontrol ventilasi konvesional menggunakan level CO2 secara langsung tanpa mengkonversinya menjadi jumlah penghuni. Laju ventilasi berdasarkan jumlah penghuni pada ruangan pengujian mengacu pada standar ASHRAE 62.1. Hasil pengujian menunjukan bahwa kontrol ventilasi berbasis pada estimasi jumlah penghuni menggunakan metode Bayesian berhasil dilaksanakan dengan nilai laju ventilasi per penghuni lebih mendekati standar ASHRAE 62.1 dibandingkan dengan ventilasi metode konvensional. Diponegoro University 2020-11-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/33416 TEKNIK; Vol 41, No. 3 (2020): December 2020 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/33416/99048 Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/3788 2012-07-18T08:47:52Z teknik:ART

"120409 2012 eng " 2460-9919 0852-1697 dc BEBERAPA ASPEK PELAKSANAAN 'UNDERPINNING' Dwi Atmanto, Indrastono Array In areas of dense buildings often found limitations of the land, resulting in the possibility that new buildingfoundation coincides or lies below the existing foundation and excavation leads to instability of the existingfoundation. Similar problem also encountered in the construction of underground infrastructure and old buildingrestoration where the existing foundation must be strengthened. A row of bored pile or diaphragm wall arecommonly used for securing of excavation. Alternatively it is more economical to do underpinning by means ofgrouting, soil nailing and micropile, in which each method has its own advantages and disadvantages. Thesystem of underpinning provides advantages over the diaphragm wall and bored pile because it can support theload directly and saves space. This paper aims to introduce the principles of design, implementation, anticipatedactions and legal aspects of underpinning. Diponegoro University 2012-07-12 10:29:15 https://ejournal.undip.ac.id/index.php/teknik/article/view/3788 TEKNIK; Volume 33, Nomor 1, Tahun 2012 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/57634 2025-04-24T18:11:04Z teknik:ART

"240613 2024 eng " 2460-9919 0852-1697 dc Nasrullah, Muhammad Nur Cahyo Hidayat Indonesia Civil Pilot Academy of Banyuwangi Rubiono, Gatut Sulung, Sabam Danny Prayitno, Hadi Penelitian ini dilakukan untuk membandingkan take off performance antara pesawat yang telah dimodifikasi menjadi pesawat seaplane (amfibi) dan pesawat Cessna standar sebelum dimodifikasi. Komparasi dilakukan menggunakan data dari flight data recorder Garmin G1000 dengan flight data logger. Data yang dipilih adalah berdasarkan pada satu pesawat yang sama, yakni dengan registrasi PK-APH, namun data difilterisasi dengan berbagai kondisi. Tujuan penelitian ini adalah untuk mengetahui dampak yang ditimbulkan oleh modifikasi seaplane (amfibi) yang telah dilakukan dari segi fase climbing, perbandingan ground roll, maksimal ground speed serta maksimal airspeed. Analisis menunjukkan perbedaan signifikan antara pesawat sebelum dan setelah dimodifikasi menjadi pesawat seaplane. Sebelum modifikasi, pesawat mencapai ketinggian 478,4 kaki diatas permukaan laut dalam 60 detik setelah lepas landas, sedangkan setelah modifikasi hanya mencapai 355,7 kaki di atas permukaan laut. Ground speed pada detik ke-20 juga berbeda, dengan pesawat sebelum modifikasi mencapai 60,69 knots dan pesawat seaplane hanya mencapai 48,65 knots. Perbedaan terlihat pada airspeed awal saat take-off, di mana pesawat sebelum modifikasi memiliki angka 71 knots pada detik ke-24, sedangkan pesawat seaplane memiliki angka 66 knots. Diponegoro University 2024-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/57634 TEKNIK; Vol. 45, No. 1 (2024): May 2024 ind Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/16140 2020-04-17T09:35:04Z teknik:ART

"171229 2017 eng " 2460-9919 0852-1697 dc Stakeholder Management of Jakarta’s Light Rail Transit Using Stakeholder Analysis Yudi, Khrisna Civil Engineering Department, Faculty of Engineering, University of Indonesia Rarasati, Ayomi Dita Center for Sustainable Infrastructure Development, Faculty of Engineering, University of Indonesia Adiwijaya, Achmad Jaka Santos Garuda Indonesia stakeholder analysis; light rail transit; infrastructure management Stakeholders involvement in infrastructure development c.q. Light Rail Transit (LRT) has a significant role since they affect the success of infrastructure management. This paper is primarily aimed to identify key stakeholders and responses that need to be applied to them. On the initial stage, a list of stakeholders was developed using research strategies such as case study and literature review. Sources were then chosen with certain criteria. They were assigned to score each stakeholder on the list. A stakeholder analysis was conducted to obtain a list of key stakeholders that have a significant impact on Jakarta’s LRT. Diponegoro University 2017-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/16140 TEKNIK; Vol 38, No 2 (2017): (Desember 2017) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1821 2012-02-15T03:18:19Z teknik:ART

2460-9919 0852-1697 dc PENGENDALIAN LANTAI PABRIK DENGAN LOAD ORIENTED MANUFACTURING CONTROL PADA INDUSTRI MEBEL (STUDI KASUS PT “X”) Hartini, Sri Saptadi, Singgih Kadarina, Nurlaila LOMC, production lead time, work load, throughput, work in process (WIP) Load Oriented Manufacturing Control (LOMC) is an input-output control system development thatconsidered work load in every work center. Production planning starts with determining production leadtime, then work load control (WLC). WLC consist of defining criteria and determining release procedure tothe shop floor for items that will be processed. This research tried to implement LOMC concept in afurniture company called PT.X. The result of the research showed that LOMC could improve throughputand minimize work in process (WIP). Diponegoro University 2012-02-02 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1821 TEKNIK; Volume 30, Nomor 1, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/39629 2021-08-29T17:46:58Z teknik:ART

"210826 2021 eng " 2460-9919 0852-1697 dc Behavioral Study of Bajulmati Dam Deformation Through Dam History Database-based Assessment Istiaji, Muhammad Santang Balai Wilayah Sungai Maluku Utara, Kementerian Pekerjaan Umum dan Perumahan Rakyat Sriyana, Sriyana Departemen Teknik Sipil Fakultas Teknik, Universitas Diponegoro Sadono, Kresno Wikan Departemen Teknik Sipil Fakultas Teknik, Universitas Diponegoro dam; instrumentation; deformation behavior; normal; abnormal Bendungan akan mengalami tekanan dari beban sendiri sampai dengan efek loading air waduk. Akibat gaya tekanan tersebut maka tubuh bendungan akan mengalami deformasi. Perilaku deformasi bendungan perlu dipantau, untuk mengetahui deformasi vertikal dan horisontal yang terjadi. Makalah ini membahas tentang perilaku deformasi pada Bendungan Bajulmati dari tahap konstruksi, pengisian awal, dan pasca konstruksi. Tujuan dari analisis ini adalah untuk menentukan perilaku deformasi "normal" sehingga studi kasus yang menunjukkan deformasi "abnormal" dapat diidentifikasi sejak dini dan kemudian dapat dianalisis lebih lanjut. Perilaku deformasi Bendungan Bajulmati hasil evaluasi berdasarkan kriteria penerimaan dari database sejarah bendungan yang serupa, sebagian besar instrumen memenuhi kriteria peenerimaan deformasi sehingga dianggap normal. Sedangkan sebagian kecil tidak memenuhi kriteria penerimaan karena nilainya diluar dari persyaratan. Hasil tersebut dapat menjadi perhatian dan rekomendasi awal untuk analisis lebih lanjut menganai perilaku deformasi abnormal yang terjadi. Diponegoro University 2021-08-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/39629 TEKNIK; Vol. 42, No. 2 (2021): August 2021 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/39629/121627 https://ejournal.undip.ac.id/index.php/teknik/article/download/39629/121628 Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/5633 2017-07-19T17:16:51Z teknik:ART

"130913 2013 eng " 2460-9919 0852-1697 dc FAKTOR PEMBENTUK PERSEPSI RUANG KOMUNAL DI PEMUKIMAN NELAYAN (Studi Kasus: Pemukiman Nelayan Tambak Mulyo Semarang) Firmandhani, Satriya Wahyu Setioko, Bambang Setyowati, Erni Array In certain settlement, human always interact with the physical setting arround of them. That interaction causes perception inside of that human, because perception is the process of organizing and interpretating of stimulus provided by the environment (Rita, 1983). So the perception is strongly influenced by the individual human and physical surroundings. Based on the theory of perception, found problems in Tambak Mulyo as fishermen settlement in Semarang, where the inhabitants of Tambak Mulyo do the communal activities on the road environment. Road environment should be a mode of land transport circulation is also used for the communal space. Seeing this phenomenon, it can be concluded that there is the perception of communal space in the fishermen settlement in Tambak Mulyo. And this study aimed to explore the factors forming the perception of communal space. In answering the research objectives, the research paradigm used is a quantitative rationalistic to construct factor variables. In constructing the factor variabless, based on the theory that the perception of the individual and the setting up of the physical environment (Sarlito, 1992). So that the required variables are perception variables and variables of communal space. The variables is operationalized into a questionnaire that is easy to understand the respondents, next after the questionnaire data collected, the data were analyzed using factor analysis statistical test, so of many variable factors that could wake is reduced to just a few factors that significantly causes the perception of communal space in the fishermen settlement. At the output of this research, revealed about the causal factors of the perception of communal space in the fishermen settlement. These factors is a collection of variable factors that have a strong correlation in the analysis. By knowing the factors forming the perception of communal space in the fishing settlement, expected to provide input in the planning and design of fishing settlements. Key words : Perception, Communal Space, Physical Setting Diponegoro University 2013-10-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/5633 TEKNIK; Volume 34, Nomor 2, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/65307 2025-07-07T19:30:43Z teknik:ART

"250331 2025 eng " 2460-9919 0852-1697 dc Widyatama, Radya Gading "Department of Civil Engineering, Diponegoro University, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275" Suharyanto, Suharyanto Sediment deposited in the reservoir will increase in line with the total erosion rate. This causes the dead storage capacity of the reservoir to siltation, so studies need to be performed to estimate the amount of erosion rate and sediment distribution during the reservoir's operational period. The study location is at the Kuwil Kawangkoan Reservoir, North Minahasa Regency, North Sulawesi Province. The study aims to determine the reservoir erosion rate using the USLE Method based on Geographic Information Systems (GIS) and to analyze changes in the reservoir sedimentation storage volume using the Area Reduction Method. Based on the analysis, the volume of sediment deposited in the Kuwil Kawangkoan Reservoir catchment area is 307,382.08 m3/tahun. Over a 50-year lifespan, the predicted total volume of settled sediment is 15.369 million m3. The results of the sediment distribution analysis indicate that after 50 years, only 17.82% of the dead storage capacity will remain. Initially, the dead storage capacity of the reservoir was 7.63 million m³, but it is projected to decrease to 1.36 million m³ at an elevation of +77.00 m, below the intake elevation. Since the intake elevation of the Kuwil Kawangkoan Reservoir is at +83.50 m, the operation of Kuwil Kawangkoan Reservoir to fulfil water demand downstream is relatively unaffected. Diponegoro University 2025-03-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/65307 TEKNIK; Vol 46, No 2 (2025) April 2025 ind Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/22355 2020-03-17T01:24:52Z teknik:EI

"181231 2018 eng " 2460-9919 0852-1697 dc Teknik, Editor in Chief Artikel editorial ini berisi back-matter jurnal Teknik Volume 39 Nomor 1 Tahun 2018 yang memuat petunjuk penulisan dan pengiriman artikel jurnal Teknik Diponegoro University 2018-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/22355 TEKNIK; Vol 39, No. 2 (2018): Desember 2018 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1912 2012-02-24T11:23:19Z teknik:ART

2460-9919 0852-1697 dc PENGGUNAAN ABU SEKAM PADI SEBAGAI ADSORBEN DALAM PENGOLAHAN AIR LIMBAH YANG MENGANDUNG LOGAM Cu Hadiwidodo, Mochtar copper industry, adsorption, water dump, copper, rice plant dust husk. The industrial development have been increased together with the increasement of the society need. Theindustrial development will produce another product in the shape of dump that will be throw away to theenvironment. One of the industrial dump was the industrial dump from the copper industry that containshard metal copper (Cu). One of the way to manufacture dump is with the adsorption process of the riceplant dust husk. This research has the aim to know the adsorption ability of the rice plant dust husk indecreasing the concentration of Cu metal in the artificial water dump and it was done with batch processand continuous. The batch experiment use 10, 20, 30 gram adsorben for each media size variation 10-30mesh and 30-50 mesh. Has the highest decreasing efficiency in the weight of 30 gram (30-50 mesh) that is52,81%-87,80%. In the continuous experiment, it was done in the column with 2 inch diameter and with222 ml/menit debit. The result was the highest decreasing efficiency until 94,98%-97,10%. Speed constanvalues (k1) 0,00743-0,0160 ml/mg.second with adsorp capacity(q0) 0,7734-1,3376 mg/g. Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1912 TEKNIK; Volume 29, Nomor 1, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/46437 2025-07-07T19:35:10Z teknik:EI

"220531 2022 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi back-matter TEKNIK Volume 43 Nomor 1 Tahun 2022 yang memuat petunjuk penulisan dan pengiriman artikel TEKNIK. Diponegoro University 2022-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/46437 TEKNIK; Vol. 43, No. 1 (2022): May 2022 ind Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/6238 2014-12-24T01:45:55Z teknik:ART

"141010 2014 eng " 2460-9919 0852-1697 dc SIFAT MEKANIK DAN MORFOLOGI PLASTIK BIODEGRADABLE DARI LIMBAH TEPUNG NASI AKING DAN TEPUNG TAPIOKA MENGGUNAKAN PEMLASTIK GLISEROL Kumoro, Andri Cahyo Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro, Semarang Purbasari, Aprilina Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro, Semarang Array [Title: Mechanical Properties and Morfology of Biodegradable Plastic from Steamed Rice Waste and Cassava Flour with Glycerol as Plasticizer] The annual consumption of plastic packaging has increased significantly as a response to the increase of people’s need and buying power. As a packaging material, plastic is light, flexible, practical and inexpensive. Unfortunately, if the plastic is not biodegradable and dumped irresponsibly to the ecosystem may cause serious environmental problems. The objective of this research was to study the effect of glycerol on the characteristic of biodegradable plastic from steamed rice waste and cassava flours composites. The biodegradable plastic was manufactured by casting the warm solution of flours composite with addition of glycerol as plasticizer. The results showed that biodegradable plastic obtained from steamed rice waste and cassava flours composites has limited mechanical stress, but remains flexible in nature. Good quality biodegradable plastic was obtained when 15% weight of glycerol in addition to 30:70 ratio of steamed rice waste flour to cassava flour with tensile strength 20.65 MPa, elongation at break 4.7% and Young Modulus 1138 MPa. The biodegradable plastic exhibits discontinue microstructure, rough and porous. Fourier transform infrared analysis proved the existence of OH, CH2, amide III and amida I groups in the biodegradable plastic.   Diponegoro University 2014-10-20 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/6238 TEKNIK; Vol 35, No 1 (2014): (July 2014) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/21889 2020-04-17T09:39:46Z teknik:ART

"191231 2019 eng " 2460-9919 0852-1697 dc Ali, Rinal Khaidar Geological Engineering Department, Faculty of Engineering, Diponegoro University, Semarang, Central java, Indonesia Qadaryati, Nurakhmi Widadi, Sigit Kecamatan Lumbir, Kabupaten Banyumas mempunyai sumber daya mineral non logam berupa lempung dan sumber daya batuan berupa andesit dan batupasir. Analisis sebaran, jenis, dan kualitas diperlukan untuk optimasi pemanfaatan sumber daya alam tersebut. Analisis laboratorium meliputi analisis XRD (X-Ray Diffractometry), XRF (X-ray Fluoroscence) dan analisis kuat tekan batuan. Analisis XRF menunjukan lempung di daerah Lumbir mempunyai unsur SiO2 yang tinggi (berkisar antara 39 – 54,5 %) sehingga dapat dijadikan bahan campuran dalam pembuatan semen, gerabah kasar, dan batu bata. Sumber daya batuan berupa andesit di Desa Canduk dan Desa Parung Kamal memiliki nilai Kuat Tekan Ultimit (qu) berkisar antara 247,7547 kg/cm2 - 45,4674 kg/cm2, sehingga dapat digunakan sebagai batu hias dan batupasir di Desa Karanggayam dapat dijadikan tanah urug Diponegoro University 2019-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/21889 TEKNIK; Vol 40, No. 3 (2019): Desember 2019 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1964 2012-02-24T11:16:25Z teknik:ART

2460-9919 0852-1697 dc DESIGN EKONOMIS UNTUK PROPELLER KAPAL Hartono, Hartono Propeller, Design. Increase of the price of world oil pushs liner to conduct action is economic from every operational unit in it’sship armada. One other most dominant in usage of fuel is Main engine is working to turn around propeller asship actuator. On that account ship owner wants design propeller which is economic for it’s ship to canreduce usage of fuel of 20% when sailing. Diponegoro University 2012-02-02 14:39:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1964 TEKNIK; Volume 29, Nomor 3, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/51580 2023-01-24T23:37:53Z teknik:EI

"221230 2022 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi front-matter TEKNIK Volume 43 Nomor 3 Tahun 2022, yaitu meliputi halaman sampul, fokus dan ruang lingkup TEKNIK, informasi indeksasi, susunan tim penyunting dan mitra bebestari, kata pengantar editor dan daftar isi. Diponegoro University 2022-12-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/51580 TEKNIK; Vol. 43, No. 3 (2022): December 2022 ind Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/9020 2015-12-09T05:21:40Z teknik:ART

"151210 2015 eng " 2460-9919 0852-1697 dc TIPOLOGI DAN KONSEP INTEGRASI PADA LINGKUNGAN BANGUNAN PENDIDIKAN DENGAN KARAKTER ARSITEKTUR KOLONIAL DI JALAN KARTINI KOTA SALATIGA Setyoaji, Sigit Ashar Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang, Rukayah, R. Siti Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang, Supriadi, Bambang Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang, typology; integration; heritage building; colonial architecture; Kartini Street Salatiga; tipologi; integrasi; bangunan cagar budaya; arsitektur colonial; Jalan Kartini Salatiga Bangunan cagar budaya adalah bangunan yang secara arsitektural memiliki kekhasan baik dari nilai arsitektural, estetika dan mewakili suatu simbol kebudayaan. Bangunan pendidikan di Jalan Kartini Salatiga merupakan sebuah komplek bangunan cagar budaya yang terdapat di Kota Salatiga, merupakan peninggalan kolonial Belanda, sehingga tidak mengherankan apabila bangunan tersebut memiliki karakter arsitektur kolonial yang membentuk identitas yang khas pada kawasan tersebut. Pembangunan selasar pendidikan di Jalan Kartini Kota Salatiga tidak terlepas dari status Kota Salatiga sebagai Kota Gemeente yang membuat Kota Salatiga maju dalam pembangunan fasilitas kotanya termasuk fasilitas pendidikan di Jalan Kartini yang diperuntukkan untuk orang pribumi. Perlu kiranya kini dilakukan sebuah studi mengenai tipologi dan konsep integrasi kawasan mengingat bangunan tersebut merupakan bangunan cagar budaya yang berada pada satu kawasan yang berdekatan, sebagai upaya peran aktif pelestarian bangunan cagar budaya dari segi akademis arsitektur. Untuk menjawab pertanyaan penelitian mengenai tipologi dan konsep integrasi pada kawasan bangunan pendidikan di Jalan Kartini Salatiga digunakan metode rekonstruksi baik secara bangunan maupun secara kawasan yang dilakukan dengan mencari data kesejarahan berupa foto maupun wawancara kepada narasumber yang kompeten. Dalam penelitian ini diketahui bahwa bangunan pendidikan di Jalan Kartini Salatiga merupakan tipologi bangunan arsitektur kolonial modern yang tidak memiliki integrasi dalam konsep penataan kawasannya.   [Title: Typologi and Integration Concept of Educational Building and Character of Colonial-based Architecture at Kartini’s Street Salatiga] Heritage building is a building that has a specific kind of architectural value, aesthetic and represent of cultural values. Educational buildings at Kartini street Salatiga is a complex of heritage buildings located in Salatiga, its a Dutch colonial heritage, so it is not surprising that the buildings has architecture colonial character that forms a distinctive identity in that region. The development of education corridor in Kartini Street Salatiga cannot be sepparated that city’s statusas a Gemeente city that makes the failities development in its citywas grow up rapidly, included educational facilities in Salatiga street, that build for home-grown peoples. It wolud need to know that doing a study about the typology and regional integration concept in view that the buildings is a heritage buildings that located on the adjacent region, as an active role of heritage building preservation in terms of academic architecture. This research used reconstruction method, both building reconstruction and region reconstruction, to answer the research question about the typology and integration concept in heritage buildings at Kartini street Salatiga, that conducted with found the data from the historical photos and interviews with competent respondent. Theconclusions of this research is the educational buildings on the Kartini street Salatiga has modern colonial architecture typologies and that do not have an integration concept in the arrangement region. Diponegoro University 2015-12-09 12:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/9020 TEKNIK; Vol 36, No 2 (2015): (December 2015) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1733 2012-02-10T06:29:29Z teknik:ART

2460-9919 0852-1697 dc PENGARUH PENAMBAHAN SILIKON TERHADAP SUDUT KONTAK HIDROPOBIK DAN KARAKTERISTIK ARUS BOCOR PERMUKAAN BAHAN RESIN EPOKSI Syakur, Abdul Novia A, Ika Sarjiya, Sarjiya Berahim, Hamzah contact angle, IEC 587, the leakage current. Currently, polymer materials such as epoxy resin have been used as an insulator in the distribution andtransmission line. Some advantages of using this epoxy resin material having the dielectric properties are betterthan porcelain and glass insulators. On the other side, epoxy resins are also disadvantage the surface ishygroscopic. For the repair was done by adding the surface properties of silicone rubber materialThis paper describes the effect of adding silicone rubber against contact angle of hidrophobicity and surfaceleakage current characteristics of epoxy resin materials ( Di-Glycidyl Ether of Bisphenol A (DGEBA) andMethaphenilene Diamine (MPDA). The study was conducted in the laboratory using the electrode method IEC587:1984 with NH4Cl contaminants. The voltage applied to the epoxy resin sample at 3.5 kV and 50 HzfrequencyThe experimental results showed that the addition of silicon rubber in epoxy resin makes the surface materialcontact angle increases. The higher percentage of silicone rubber, the greater the contact angle and the longertime required for the occurrence of surface discharge. Diponegoro University 2012-02-02 14:47:46 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1733 TEKNIK; Volume 32, Nomor 3, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/28857 2020-10-05T05:15:53Z teknik:ART

"200831 2020 eng " 2460-9919 0852-1697 dc Pengaruh Lapisan Dy & Tb pada Temperatur Rendah terhadap Koersivitas Magnet Permanen Tipe NdFeB Afrilinda, Eva Balai Besar Logam dan Mesin, Kementerian Perindustrian Virdhian, Shinta Balai Besar Logam dan Mesin, Kementerian Perindustrian https://scholar.google.com/citations?user=5bSdsvcAAAAJ&hl=en Djuanda, Dagus Resmana Balai Besar Logam dan Mesin, Kementerian Perindustrian Doloksaribu, Martin Balai Besar Logam dan Mesin, Kementerian Perindustrian difusi batas butir temperatur rendah; dysprosium (Dy); koersivitas; magnet NdFeB; terbium (Tb) Pelapisan permukaan magnet dengan unsur tanah jarang berat (heavy rare earth element-HREE) diikuti difusi batas butir dapat meningkatkan koersivitas tanpa mempengaruhi remanen. Pada umumnya perlakuan panas dilakukan pada temperatur tinggi agar lapisan HRE dapat terdifusi ke dalam permukaan. Namun temperatur tinggi dapat meningkatkan ukuran butir sehingga koersivitas menurun. Penelitian ini mempelajari pengaruh lapisan Dy dan Tb pada temperatur rendah. Sampel magnet permanen dilapisi DyF3 dan TbF3 kemudian diberikan dua variasi perlakuan panas. Pertama, sampel diberikan perlakuan panas anil temperatur 700oC selama 6 jam lalu perlakuan setelah anil pada 500oC selama 1 jam. Kedua, sampel diberikan perlakuan panas anil temperatur 700oC selama 10 jam lalu perlakuan setelah anil pada 500oC selama 2 jam. Hasil uji koersivitas menunjukkan bahwa nilai koersivitas magnet permanen dengan Tb lebih besar dibandingkan dengan Dy pada waktu tahan 6 jam dan 10 jam. Pengamatan struktur mikro dengan SEM-EDS dan EPMA menunjukkan bahwa oksida terdifusi lebih dalam pada lapisan Tb dibandingkan lapisan Dy. Diponegoro University 2020-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/28857 TEKNIK; Vol 41, No. 2 (2020): August 2020 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/28857/83335 Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2143 2012-02-24T02:59:51Z teknik:ART

2460-9919 0852-1697 dc PENGOMPOSAN LIMBAH TEH HITAM DENGAN PENAMBAHAN KOTORAN KAMBING PADA VARIASI YANG BERBEDA DENGAN MENGGUNAKAN STARTER EM4 (EFECTIVE MICROORGANISM-4) Syafrudin, Syafrudin Zaman, Badrus Black Tea, Charactistic, Compost, EM4,Goat Manure, Waste Black tea waste composting needs dryer material to absorb moisture of waste which is to be left. Dryermaterial used is goat manure. To make faster composting proccess and decrease rot smell potency which isout from heap, so used Effective Microorganism 4 (EM4). This research have direction to know characteristicof mature compost, the optimal comparison of mixing composition black tea waste and goat manure withEM4 addition, and cost needed to make compost. Variations taken are control variation (black tea waste), Avariation (black tea waste + 30 ml EM4), and B variation (black tea waste : goat manure + 30 ml EM4). Bvariations include B1 variation (1 : 1), B2 variation (3 : 2), B3 variation (7 : 6), and B4 variation (7 : 8). Theresult of this research shown most optimal composting is B3 variation with content of Organiccarbon:Nitrogen:Phospor:Kalium: C/N ratio: water content is 12,411% :1,063% :0,581 %:K 1,608%:11,68: 46,464 . Diponegoro University 2012-02-10 11:25:01 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2143 TEKNIK; Volume 28, Nomor 2, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/59191 2025-04-24T18:11:04Z teknik:ART

"240613 2024 eng " 2460-9919 0852-1697 dc Hazim, Muhammad Fadhlurrahman Departemen Teknik Sipil, Universitas Diponegoro, Jl. Prof Sudarto, S.H, Tembalang, Semarang, Indonesia 50275 Department Civil Engineering, University Diponegoro, Jl. Prof Sudarto, S.H, Tembalang, Semarang, Indonesia 50275 Sukamta, Sukamta Suprapto, Suprapto Bendungan Telaga Tunjung yang terletak di Provinsi Bali yang dibangun pada tahun 2003-2006. Pada tahun 2015 dan 2020 telah dilakukan survey bathimetri akibat jumlah sedimen telah memenuhi tampungan waduk hingga mengurangi umur layan waduk. Tujuan dari penelitian ini adalah mengevaluasi keamanan bendungan yang ditinjau dari deformasi vertikal dari data bacaan alat instrumentasi patok geser. Penelitian ini menggunakan data dari bacaan patok geser yang kemudian dianalisis nilai settlement index dan nilai deviasi yang dibandingkan dengan kriteria penerimaan yaitu 1% dari tinggi bendungan. Penelitian ini memakai data pada tahun 2006, 2007, 2017, dan 2022. Hasil dari penelitian ini pada tahun 2017 menunjukan di daerah lereng hulu main dam dalam kondisi yang kurang aman karena nilai deviasi melebihi 1% dan nilai settlement index di atas 0,02, namun kondisi terakhir pada tahun 2022 deformasi vertikal bendungan dalam kondisi aman karena semua nilai deviasinya masih di bawah 1% dan nilai settlement index di bawah 0,02. Diponegoro University 2024-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/59191 TEKNIK; Vol. 45, No. 1 (2024): May 2024 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/59191/190432 Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/9546 2020-04-17T09:33:06Z teknik:ART

"170701 2017 eng " 2460-9919 0852-1697 dc Kajian Perilaku Dinamik Struktur Jembatan Penyeberangan Orang (JPO) 2 Lantai Akibat Beban Manusia yang Bergerak Indarto, Himawan Diponegoro University Pudjianto, Bambang Nurhuda, Ilham Jembatan Penyeberangan Orang, beban dinamik, frekuensi getar,pedestrian bridge, dynamic load, natural frequency Jembatan Penyeberangan Orang (JPO) dengan bentang panjang dan JPO dengan lantai bertingkat, mulai banyak di bangun di kota-kota besar di Indonesia. JPO dibangun sebagai sarana penghubung dari satu bangunan ke bangunan lainnya, sekaligus berfungsi sebagai jembatan penyeberangan lalu lintas yang berada di bawahnya. Bentuk struktur yang langsing membawa konsekuensi, bahwa struktur JPO rentan terhadap masalah getaran. Masalah munculnya getaran pada struktur JPO pada saat orang melewati jembatan, akan menyebabkan ketidak-nyamanan bagi pengguna jalan. Getaran yang muncul pada JPO dapat diakibatkan oleh karena frekuensi getar alami dari struktur JPO yang terlalu besar, atau terjadinya resonansi yang diakibatkan karena frekuensi getar beban yang melewati JPO mendekati frekuensi getar alami dari struktur. Pada perencanaan struktur JPO, asumsi bahwa beban pejalan kaki merupakan beban statik dengan hanya satu arah komponen beban kearah vertikal, adalah tidak tepat. Beberapa penelitian telah membuktikan bahwa beban orang yang bergerak merupakan beban dinamik yang mempunyai tiga komponen arah beban, yaitu arah vertikal, longitudinal, dan lateral. Dari hasil penelitian diketahui bahwa, beban pejalan kaki yang bersifat dinamik pada struktur JPO 2 Lantai, akan menyebabkan deformasi struktur 1,55 kali lebih besar  dibandingkan dengan deformasi yang didapat dari analisis statik. Hal ini kiranya perlu diperhatikan di dalam perencanaan struktur JPO, agar didapatkan perencanaan yang memenuhi syarat kekuatan dan kekakuan, sehingga tidak menyebabkan terjadi permasalahan getaran pada saat digunakan.   Diponegoro University 2017-07-01 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/9546 TEKNIK; Vol 38, No 1 (2017): (Juli 2017) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1770 2012-02-10T07:57:25Z teknik:ART

2460-9919 0852-1697 dc PENYUSUNAN DOKUMEN POTENSI BAHAN TAMBANG DI LUAR WILAYAH SUNGAI KABUPATEN PEKALONGAN Najib, Najib Mining, hypothetic reserve Besides in River area, Pekalongan Regency estimated has mineral potential in some areas outside of that area.Yet local government doesn’t have data about the potency of that mineral. In consequence, it is needed toconducts mapping of mineral potency outside of river circumstance that the result will be used by localgovernment either guide taking policy in exploitation or regulation to that activity. This research used somesteps i.e. measurement and mapping phase, analysis and data processing (hypothetic reserve calculation andlaboratory mineral tests such as AAS, petrography and shear strength) and data compilation. The potency ofminerals and rocks is disseminated in 14 districts in Pekalongan Regency. Types of those mine materials areAndesite, Diorite, Limestone, Tras, Clay, Ochre, Gold and iron sand. Mining systems possibly conducted are PitType System, Eunuch Hill System and Cave System. Diponegoro University 2012-02-02 14:46:02 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1770 TEKNIK; Volume 31, Nomor 2, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/37441 2021-08-29T17:46:58Z teknik:ART

"210826 2021 eng " 2460-9919 0852-1697 dc Noise Level Analysis of KM. Sabuk Nusantara 71 to Increase Ship Passengers Comfort Based on BKI Rules Sugeng, Sunarso Department of Industrial Technology, Vocational School, Diponegoro University Ridwan, Mohammad Department of Industrial Technology, Vocational School, Diponegoro University Sulaiman, Sulaiman Department of Industrial Technology, Vocational School, Diponegoro University Khristyson, Samuel Febriary Department of Industrial Technology, Vocational School, Diponegoro University noising; side deck girder; engine room; profil T; construction Noise is an unwanted sound or sound source which can distract or harm human health and comfort. According to experts, a sound that exceeds the level of human listening senses can cause deafness. Such danger can also be found in ships. An alternative to reduce noise in ships is by modifying the construction.  This research aims to compare noising before and after adding a side deck girder in the engine room of a 2000 DWT ship. The result showed that in the engine room, after adding a FB 180 x 8 mm FP 75 x 10 mm sized T profile, for 0-30 seconds intervals, the maximum noise was down from 127 dB to 62 dB or a 0.47% decrease. Meanwhile, the maximum noise was down from 98.6 dB to 57 dB in the accommodation room or decreased by 0.41%. The maximum noise was down from 83 dB to 37 dB or a 0.56% decrease in the navigation room. Such modification had reduced the average noise range from 80-40 dB to 55-20 dB. Diponegoro University 2021-08-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/37441 TEKNIK; Vol. 42, No. 2 (2021): August 2021 eng https://ejournal.undip.ac.id/index.php/teknik/article/download/37441/122153 https://ejournal.undip.ac.id/index.php/teknik/article/download/37441/122154 Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4816 2013-05-06T03:42:01Z teknik:ART

"130402 2013 eng " 2460-9919 0852-1697 dc PENENTUAN BATAS WILAYAH LAUT PROVINSI JAWA TENGAH DAN JAWA BARAT MENGGUNAKAN DATUM GEODESI NASIONAL Kahar, Sutomo Array According to Minister of Internal Affair regulation which is Permendagri No.1 Tahun 2006, Peta Lingkungan Laut Indonesia (LLN) must be utilized to define boundaries of province sea jurisdiction. Unfortunately, Peta Lingkunan Laut Indonesia still applies Indonesia Datum 1974 instead of Datum Geodesi Nasional 1995. It is contrary with Permendagri No 76 Tahun 2012 and UU No.4 Tahun 2011 which declare the urgency of single reference datum for Indonesia region. To fit the requirement, Peta Lingkungan Laut Indonesia must be transformed into official datum. This research applied two transformation formulae. There was Lauf Transformations to accomodate 2 Dimension Transformation. Computation of transformation parameters and application of those parameters were tested at North Coast of Java from Kendal regency to Brebes regency. As calculated in MatLab software, this research concluded that Lauf transformation was good for transforming Lingkungan Laut Indonesia from ID74 to DGN95. Diponegoro University 2012-08-08 13:06:31 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/4816 TEKNIK; Volume 34, Nomor 1, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/62988 2025-04-17T01:00:52Z teknik:ART

"241230 2024 eng " 2460-9919 0852-1697 dc Drivers-Pressures-State-Impact dan Responses sebagai Alternatif Kerangka Penguatan Daya Dukung Lahan Pertanian di Kabupaten Batang Destianto, Rifki Magister Pembangunan Wilayah dan Kota Fakultas Teknik, Universitas Diponegoro Basuki, Yudi Departemen Teknik Perencanaan Wilayah dan Kota Fakultas Teknik, Universitas Diponegoro DPSIR, Lahan Sawah dilindungi, Daya Dukung Lahan Maraknya alih fungsi lahan khususnya dari lahan pertanian ke lahan non pertanian, mendorong pemerintah pusat pada tahun 2019 menerbitkan standar ganda dalam perlindungan lahan pertanian berupa Peraturan Presiden Nomor 59 Tahun 2019 tentang Pengendalian Alih Fungsi Lahan Sawah. Peraturan tersebut kemudian mengatur tentang Lahan Sawah Dilindungi (LSD). Lahan Sawah yang Dilindungi merupakan lahan baku sawah yang ditetapkan menteri yang menyelenggarakan urusan pemerintahan di bidang agraria/pertanahan dan tata ruang melalui sinkronisasi Tim Terpadu Pengendalian Alih Fungsi Lahan Sawah. Pemerintah kemudian melakukan klarifikasi kepada Pemerintah Daerah guna menyepakati luasan lahan sawah dilindungi (LSD). Selanjutnya Peta Lahan Sawah Dilindungi tersebut akan dikendalikan pengintegrasiannya ke dalam Rencana Tata Ruang Wilayah masing-masing Kabupaten/Kota sebagai bagian dari Lahan Pertanian Pangan Berkelanjutan. Kabupaten Batang merupakan salah satu kabupaten di Jawa Tengah yang penggunaan lahannya 80% adalah lawan pertanian yang tersebar di masing-masing kecamatan, baik lahan pertanian basah dan lahan pertanian kering. Tentunya hal tersebut akan berbanding lurus dengan hasil produksi tanaman pangan terutama padi, sebagai bahan pangan pokok utama masyarakat Kabupaten Batang. Namun, di sisi lain Kabupaten Batang adalah salah satu wilayah di Provinsi Jawa Tengah yang saat ini sedang berkembang aktivitas industri dengan skala internasional. Dengan adanya fenomena di wilayah Kabupaten Batang tersebut serta sebagai pengendalian terhadap alih fungsi lahan pertanian di Kabupaten Batang perlu diperhatikan terkait daya dukung lahan pertanian. Peneltiian ini menggunakan metode DPSIR dalam sebagai kerangka untuk mengorganisir sebuah informasi dan data tentang kondisi lingkungan hidup. Diponegoro University 2024-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/62988 TEKNIK; Vol 45, No 3 (2024): December 2024 eng Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/17883 2020-04-17T09:37:21Z teknik:ART

"181231 2018 eng " 2460-9919 0852-1697 dc Accuracy Analysis Of Three Dimensional Models Of Building Prof. H. Soedarto S. H. Using The Terrestrial Laser Scanner Technology Based On Traverse Method Prasetyo, Yudo Department of Geodetic, Faculty of Engineering, Diponegoro University https://scholar.google.co.id/citations?user=Q1GQz28AAAAJ&hl=en http://orcid.org/0000-0002-4777-8923 3D Model, Buildingg of Prof. H. Soedarto S. H.; Traverse Method, Terrestrial Laser Scanner The technology to record spatial building for conservation and spatial planning is growing rapidly. The urgency of the accuracy level in a measurement were set up higher than it used to. Three-dimensional object forming using Terrestrial Laser Scanner (TLS) equipment was one of the popular technologies among all. The TLS measurement method consists of 4 methods: Cloud to Cloud, Target to Target, Traverse, and hybrid method. This research aims to analyse the accuracy level of the Traverse method in measuring an 3D object for building documentation purposes using TLS. The accuracy level of Traverse method will be tested onto Building of Prof. Soedarto, S. H. There are two parameters used in validating the accuracy level of Traverse method: registration methods and visualization results of the three-dimensional model. The analysis result of point cloud data shows that TLS equipment applied with Traverse method is capable of producing 3D model of Building of Prof. H. Soedarto S. H. The obtained average validation value is 0.004 meters with the accuracy level of the RMSE model of ± 0.00611 meters Diponegoro University 2018-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/17883 TEKNIK; Vol 39, No. 2 (2018): Desember 2018 eng Copyright (c) 2019 Teknik

oai:ojs.ejournal.undip.ac.id:article/1892 2012-02-24T10:20:44Z teknik:ART

2460-9919 0852-1697 dc KARAKTERISTIK AKTIVITAS PEDAGANG KAKI LIMA PADA KAWASAN KOMERSIAL DI PUSAT KOTA Studi Kasus: Simpang Lima, Semarang Widjajanti, Retno street vendors, the space for street vendor's activity, street vendor activity The characteristic of street vendors in Simpang Lima should be recognized. It is connected with spatial region’sactivity so that both of the formal and informal activities can exists harmonically. The characteristics of thestreet food vendors activity are follows: the activity space (street vendor’s trading location is at the mall/office/school/mosque/ in Pancasila square and they are selling in the sidewalk at the edge of the Pancasila square);their distribution pattern is agglomeration; they are more settle; their activities (type of food/beverage,accessories, clothing, grocery, cigarettes, and their facilities are tent, wagon, carpet, table/rack; the time ofstreet vendors trading is following the formal activities of the region; goals and motivations of visitor’s vendorsis that most of them are visiting street vendors, and the motivational visits are to buy food/drinks and othertypes of merchandise). Diponegoro University 2012-02-15 10:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1892 TEKNIK; Volume 30, Nomor 3, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/41277 2025-07-07T19:35:10Z teknik:ART

"220531 2022 eng " 2460-9919 0852-1697 dc Neuroscience Approach In Understanding The Urban Spatial Form Purwanto, Edi Departemen Teknik Arsitektur, Universitas Diponegoro https://scholar.google.com/citations?view_op=list_works&hl=id&user=MkQPWc4AAAAJ Ayuningtyas, Rosyida Departemen Teknik Arsitektur, Universitas Diponegoro urban spatial form, observer spatial cognition, neuroscience, emotion, meaning Selama ini dalam memahami bentuk spasial kota dilakukan dengan menggunakan kemampuan kognisi spasial pengamat untuk mendapatkan gambaran imajinasi struktur kota yang didalamnya terdapat hubungan elemen fisik satu dengan elemen fisik lainnya. Penelitian ini menawarkan teknik penggunaan kemampuan otak pengamat yang disebut neurosains agar pemahaman bentuk spasial kota lebih dari sekadar bentuk fisik yang berestetika, namun juga terkait dengan munculnya perasaan dan emosi dari pengamat. Penelitian ini bertujuan untuk membahas pendekatan neurosains dalam memahami bentuk spasial kota untuk melengkapi penggunaan kognisi spasial yang sebelum ini telah dilakukan oleh para peneliti lain. Manfaat penelitian ini digunakan sebagai salah satu instrumen dalam mengevaluasi desain ruang kota berdasarkan persepsi pengamat. Metode penggalian data dan informasi menggunakan teknik menggambar peta oleh pengamat dengan berfokus pada penguasaan area perkotaan beserta elemen-elemen fisik di dalamnya kemudian dilanjutkan dengan wawancara secara mendalam. Hasil penelitian telah membuktikan, bahwa pendekatan neurosains dalam memahami bentuk spasial kota telah menghasilkan pengkayaan pemahaman, tidak hanya pada pemahaman bentuk fisik struktur kota beserta elemen-elemen identitasnya sekaligus menyertakan respon emosi dan makna pengamat terhadap bentuk spasial kota Diponegoro University 2022-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/41277 TEKNIK; Vol. 43, No. 1 (2022): May 2022 ind Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/7020 2015-01-31T23:49:51Z teknik:ART

"141230 2014 eng " 2460-9919 0852-1697 dc PENINGKATAN KUALITAS DAN PROSES PEMBUATAN BIODIESEL DARI BLENDING MINYAK KELAPA SAWIT (PALM OIL) DAN MINYAK KELAPA (COCONUT OIL) DAN BANTUAN GELOMBANG ULTRASONIK Satriadi, Hantoro Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang 50275 Nafiega, Favian Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang 50275 Widayat, W. Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang 50275 Dipo, Rheza Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang 50275 Array Keterbatasan solar sebagai sumber energi bahan bakunya tidak dapat diperbaharui menuntut adanya bahan baku alternatif yang dapat diperbaharui dan ramah lingkungan untuk pembuatan biodiesel. Reaksi utama produksi biodiesel adalah esterifikasi dan transestirifikasi yang berlangsung lambat dan membutuhkan banyak katalis dan alkohol. Reaksi yang terjadi belum sempurna dan belum memenuhi standar SNI dan ASTM. Untuk memperbaiki mutu biodiesel serta menghasilkan yield maksimal, maka dilakukan blending bahan baku antara minyak kelapa sawit dan minyak kelapa dan dengan bantuan gelombang ultrasonic. Penelitian ini bertujuan untuk mempelajari pengaruh variabel perbandingan volume minyak kelapa sawit dan minyak kelapa, perbandingan volume methanolminyak, dan persentase berat katalis terhadap minyak terhadap hasil atau yield biodiesel. Alat utama yang digunakan adalah reaktor yang dilengkapi pembangkit gelombang ultrasonic dengan temperature 60 oC, tekanan 1 atm, volume 3 liter, dan frekuensi 28 kHz. Variabel proses pada penelitian ini adalah perbandingan volume minyak sawit dan kelapa 2:1, 3:1, dan 4:1, pebandingan volume metanol-minyak 0,2:1, 0,25:1, dan 0,3:1, dan persentase berat katalis KOH terhadap minyak 0,3%, 0,5%, dan 0,7%. Hasil penelitian didapat konversi tertinggi dicapai pada variabel perbandingan volume minyak sawit dan kelapa 3:1, perbandingan volume metanol/minyak 0,25:1, dan persentase berat katalis terhadap minyak dengan yield 97,26%. [A Improvement of Quality and Process for Biodiesel Production from Palm Oil and Coconut Oil Blends with Ultrasound Assisted] Limitations of solar energy as a source of raw material cannot be renewed demands for alternative raw materials that are renewable and environmentally friendly for the manufacture of biodiesel. The main production of biodiesel reaction is esterification and transestirifikasi which runs slow and requires a lot of alcohol and a catalyst. Reactions that happen yet perfect, and has not met the standard of SNI and ASTM. To improve the quality of biodiesel as well as produce maximum yield, then do the blending of raw materials between Palm oil and coconut oil and with the help of ultrasonic waves. This research aims to study the influence of variable ratio of the volume of palm oil and coconut oil, methanol-oil volume ratio, and the percentage of weight of the catalyst to oil to biodiesel results or yield. The main tool used by the reactors are equipped with ultrasonic wave generator temperature 60 oC, pressure 1 atm, 3 liters of volume, and frequency 28 kHz. Process variables in this study is a comparison of the volume of palm oil and coconut 2:1, 3:1 and 4:1, ratio volume of methanol-oil 0.2:1, 0.25:1, and 0,31:1, and the percentage of weight of KOH catalyst to oil 0.3%, 0.5% and 0.7%. Results of the study had the highest conversion achieved at variable volume ratio of palm oil and coconut 3:1, a comparison of the volume of methanol/oil 0.25:1, and the percentage of the weight of oil with the catalyst to yield 97,26%. Copyright (c) by Fakultas Teknik, Undip. All right reserved. Diponegoro University 2015-01-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/7020 TEKNIK; Vol 35, No 2 (2014): (Desember 2014) eng https://ejournal.undip.ac.id/index.php/teknik/article/download/7020/15002 https://ejournal.undip.ac.id/index.php/teknik/article/download/7020/15003 Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/54148 2025-11-17T01:02:24Z teknik:ART

"251117 2025 eng " 2460-9919 0852-1697 dc The Analysis of Target Drone Wing Sweep Angle on Dynamic Stall Condition with Pitch Rate Variation using Computational Fluid Dynamics Bramantya, Muhammad Agung Department of Mechanical and Industrial Engineering, Faculty of Engineering, Universitas Gadjah Mada, Jl. Grafika No. 2, Kampus Teknik UGM, Yogyakarta, 55281 Nugroho, Gesang Department of Mechanical and Industrial Engineering, Faculty of Engineering, Universitas Gadjah Mada, Jl. Grafika No. 2, Kampus Teknik UGM, Yogyakarta, 55281 target drone; wing sweep angle; pitch rate; CFD; transient A target drone is a type of Unmanned Aerial Vehicle (UAV) with a special mission as a shooting target in the military field. Target drones must be able to fly at high speeds and be agile. This study discusses the influence of the wing sweep angle on the aerodynamic performance of a target drone during dynamic stall conditions. Banshee Whirlwind-like model is used as a research object in this study with the adjustment of the empennage design to a V-Tail configuration. Furthermore, the wing sweep angle was varied to determine its effect on dynamic stall conditions using Computational Fluid Dynamics (CFD) in transient conditions. The wing sweep angle variations used were 5°, 20°, 35°, and 50°, whereas the dynamic stall condition was varied using pitch rates of 3.6°/s, 6°/s, and 18°/s. The aerodynamic performance discussed relates to the lift force, drag force, efficiency, stall angle, lateral stability, and stall development phase. The results of this study indicate that a wing sweep angle of 50° is the most optimal design in terms of stall condition, stability, and maneuverability. Diponegoro University 2025-11-17 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/54148 TEKNIK; Vol 46, No 3 (2025): Juli 2025 eng Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1937 2012-08-08T06:08:29Z teknik:ART

2460-9919 0852-1697 dc ZONA KERENTANAN AIRTANAH TERHADAP KONTAMINAN DENGAN METODE DRASTIC Putranto T.T, Putranto T.T Kuswoyo, Benny Groundwater vulnerability, contaminant, DRASTIC technique Almost all groundwater resources are vulnerable to various degrees. Vulnerability of groundwater is arelative, dimensionless property that is not directly measurable. It is assesed by using the DRASTICtechnique. The accuracy of its assessment depends, above all, on the amoun and quality of representativeand reliable data available. The required data is often not available and thus scale of mapping os oftenlimited to broad scale catchment maps. The DRASTIC vulnerability mapping technique can generally bereferred to as a composite description of all the major geologic and hydrogeologic factors that affect andcontrol groundwater movement, into, through and out of an area. DRASTIC is an acronym for the mostimportant mappable features within the hydrogeologic setting which control groundwater pollution.These features are: D (Depth to watertable), R (Net) Recharge, A (Aquifer media), S (Soil media), T(Topograhy/slope), I (Impact of vadoze zone) and C (hydraulic Conductivity of aquifer). Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1937 TEKNIK; Volume 29, Nomor 2, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/48337 2023-01-24T23:37:53Z teknik:ART

"221229 2022 eng " 2460-9919 0852-1697 dc Synthesis and Performance Evaluation of Magnetized Modified Coal Fly Ash as Adsorbent for Naphthol Blue Black Dye Removal from Synthetic Dye Wastewater Kusumawardani, Restu Departemen Teknik Kimia, Fakultas Teknik, Universitas Diponegoro https://orcid.org/0000-0002-3905-5936 Purbasari, Aprilina Departemen Teknik Kimia, Fakultas Teknik, Universitas Diponegoro adsorption; alkali; coal fly ash; magnetite; naphthol blue black The removal of dyes from wastewater has become a major concern in the textile industry due to the adverse effects of dyes on the environment. This research focuses on the adsorption of naphthol blue black (NBB) dye by synthesizing coal fly ash with alkali (sodium hydroxide solution) and Fe3O4 (magnetite) to accelerate the separation of dyes from aqueous solutions. Magnetized modified coal fly ash (MMCFA) was characterized by XRF, SEM, and FTIR analysis. Batch experiments were carried out to study the effect of pH, initial concentration, and contact time on the efficiency of dye removal. The results showed that the adsorption of NBB dye reached the optimum condition at initial concentration of 100 mg/L with pH of 6 and contact time of 120 minutes. The ability of MMCFA to adsorb NBB dye was higher than that of sieved coal fly ash (SCFA) and modified coal fly ash (MCFA). The addition of alkali and Fe3O4 can be proven to increase the adsorption ability of SCFA. The percentage of NBB dye that was adsorbed by MMCFA, MCFA, and SCFA at optimum condition was 96.39%, 89.83%, and 89.33%, respectively. Diponegoro University 2022-12-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/48337 TEKNIK; Vol. 43, No. 3 (2022): December 2022 eng Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/8755 2015-10-17T03:39:04Z teknik:EI

"150704 2015 eng " 2460-9919 0852-1697 dc Front-matter Istadi, Istadi jurnal teknik Diponegoro University 2015-07-04 16:42:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/8755 TEKNIK; Vol 36, No 1 (2015): (Juli 2015) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1706 2012-02-10T06:41:42Z teknik:ART

2460-9919 0852-1697 dc PENGARUH PEMBEBASAN LAHAN TERHADAP RISIKO PROYEK KONSTRUKSI (STUDI KASUS SOCIAL ENGINEERING PROYEK JALAN TOL RUAS SEMARANG BAWEN) Hermawan, Ferry Kistiani, Frida Djoko Santoso, Tanto risk, social engineering, land acquisition Semarang-Solo toll road has strategic significance for the development of the national road network inparticular in Central Java and also for the development of road networks in the regional scale. At stage 1 is thesegment Semarang-Bawen along 23.1 km is divided into sections 1 Semarang-Ungaran along 14.1 km requireland acquisition area of 52.23 Ha and 7.8 km long in Semarang district with an area of land acquisition needs60.37 Ha. Although he was pursued through the vacant lands, but in reality also crossed the road infrastructureor splitting the existing environment. Land acquisition is a fundamental problem of construction project and it ispart of the risk of infrastructure procurement. Purely technical approach sometimes can not always solve theproblem to minimize the risk. So this condition is sometimes often be in the realm of social engineering. Diponegoro University 2012-02-02 14:48:56 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1706 TEKNIK; Volume 32, Nomor 2, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/31373 2020-07-05T22:50:43Z teknik:EI

"200531 2020 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi back-matter jurnal Teknik Volume 41 Nomor 1 Tahun 2020 yang memuat petunjuk penulisan dan pengiriman artikel jurnal Teknik Diponegoro University 2020-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/31373 TEKNIK; Vol 41, No. 1 (2020): May 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2114 2012-02-23T04:06:46Z teknik:ART

2460-9919 0852-1697 dc PENGOMPOSAN DENGAN MENGGUNAKAN LUMPUR DARI INSTALASI PENGOLAHAN AIR LIMBAH INDUSTRI KERTAS DAN SAMPAH DOMESTIK ORGANIK Zaman, Badrus Bagus Priyambada, Ika Composting, Sludge, Waste, Open Windrow Waste water treatment of paper industry yield side product in the form of sludge which have generated problembecause there is no continuation processing. Composting sludge which come from waste water processing differfrom other composting organic solid waste, which generally in the form of dry substance. In this research usedadditional substance in the form of organic domestic solid waste, with variation sludge : domestic solid waste(kg/kg) successively 1 : 1, 1 : 4, 1 7, 3 : 2, and 5 : 3. Composting method is done by open windrow, where thecompost heaped longly and let to be opened (aerob). Result of research indicate that to the overall of variationof compost really have fulfilled standard of good ripeness compost according to SNI 19-7030-2003 and alsoaccording to other ripe compost standard. Besides, all variation of compost have yielded ripe compost withcharacteristic fulfilling hara required by crop. Variation Compost 1 : 1 representing the best compost with COrganiccontent 41,507 %, N-Total content 3,008 %, ratio C/N 13,80, moisture rate 44,03 %, P-Total content1,085 %, K-Total content 4,183 %, final temperature 30,3° C and pH 7,98 Diponegoro University 2012-02-10 11:25:01 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2114 TEKNIK; Volume 28, Nomor 2, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/53990 2024-01-16T21:44:16Z teknik:ART

"231208 2023 eng " 2460-9919 0852-1697 dc A Review on Digital Microscopic Images for Plasmodium Parasite Detection Nisworo, Sapto Department of Electrical Engineering, Universitas Tidar Prananda, Alifia Revan Department of Information Technology, Universitas Tidar CAD; early detection; malaria; medical image analysis; Plasmodium parasite Indonesia is one of the regions that contribute to the increasing number of malaria cases. In 2019, more than 250 million malaria cases were found in Indonesia. This phenomenon is caused by several factors, including the examination procedure. In Indonesia, the digital microscopic examination has become the gold standard procedure in detecting and diagnosing malaria, whereas this procedure requires considerable expertise. Hence, the rapid examination is difficult to ensure. In order to overcome this problem, several methods of malaria detection have been proposed with a different approach. Image processing and computer vision techniques have become a powerful approach in the development of early detection systems called computer-aided detection (CADe) and computer-aided diagnosis (CADx). Several previous findings reported their contributions in detecting Plasmodium parasites using image processing and computer vision. Recently, artificial intelligence, including machine learning and deep learning, also offered outstanding results in detecting the Plasmodium parasite. This paper aims to present a scientific review of recent image processing and computer vision applications for the development of CADe or CADx in order to assist the doctor in doing rapid detection and diagnosis. Diponegoro University 2023-12-08 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/53990 TEKNIK; Vol. 44, No. 3 (2023): December 2023 eng Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/12647 2020-04-17T09:32:42Z teknik:ART

"161231 2016 eng " 2460-9919 0852-1697 dc Penyisihan Limbah Organik Air Lindi TPA Jatibarang Menggunakan Koagulasi-Flokulasi Kimia Rezagama, Arya Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang Hadiwidodo, Mochtar Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang Purwono, Purwono Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang Ramadhani, Nurul Fajri Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang Yustika, Mia Departemen Teknik Lingkungan, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang Bahan Organik; Lindi; Koagulasi-flokulasi; Organic Materials; Lindi; Coagulation-floculation Air lindi yang meresap ke dalam tanah yang berpotensi bercampur dengan air tanah sehingga menimbulkan pencemaran tanah, air tanah dan air permukaan. Komposisi limbah lindi dari berbagai TPA berbeda-beda bergantung pada musim, jenis limbah, umur TPA. Proses dalam TPA menghasilkan molekul organik recalcitrant yang ditunjukkan dengan rendahnya rasio BOD/COD dan tingginya nilai NH3-N. Belum optimalnya pengolahan air lindi di Jatibarang membutuhkan pretreatment sebagai bentuk upaya alternatif dalam proses pengolahan air lindi sebelum masuk ke dalam proses aerated lagun. Penelitian ini bertujuan untuk menganalisa pengaruh koagulan kimia pada penyisihan bahan organik air lindi TPA Jatibarang. Penelitian dilakukan pada bulan April- Agustus 2016. Karaktersitik air lindi TPA Jatibarang termasuk dalam kategori "moderately stable" dan lindi muda. Penyisihan bahan organik dengan menggunakan kuagulan kimia FeCl3 dan Al2SO4 menunjukkan nilai yang cukup signifikan untuk parameter COD, BOD, TSS. Penggunaan dosis optimal terjadi pada 16 g/L FeCl3 serta 16 g/L Al2SO4 dapat menurunkan nilai COD sebesar 51% dan 65%, BOD sebesar 50% dan 56%, dan TSS sebesar 24% dan 21%. Perubahan nilai pH akibat penambahan koagulan berpengaruh positif terhadap tingkat penyisihan, namun memberikan dampak negatif yaitu buih yang cukup banyak. Penurunan beban organik menguntungkan bagi sistem pengolahan lindi eksisting TPA Jatibarang.  [Title: Removal of Lindi Water Organic Waste of TPA Jatibarang using Chemical Coagulation- Floculation] Leachate grounding into the soil that potentially could mix with the groundwater caused contamination of soil, groundwater and surface water. The composition of waste landfill leachate from the various location is depending on the season, the type of waste, and landfill age. Process in the TPA produces recalcitrant organic molecules as indicated by the low ratio of BOD/COD and NH3-N high value. The ineffective treatment of leachate at Jatibarang require a pretreatment as a form of alternative effort in the processing of leachate prior to entry into the aerated lagoon process. This study aims to analyze the influence of chemical coagulants on grounding organic material Jatibarang landfill leachate. The study was conducted in April-August 2016. Jatibarang landfill leachate characteristics were categorized as "moderately stable" and young leachate. Allowance for organic materials using chemical coagulants of FeCl3 and Al2SO4 showed significant values for the parameters of COD, BOD, and TSS. The use of optimal dose occurs at 16 g/L FeCl3 and 16 g/L Al2SO4 which can reduce the COD value by 51% and 65%, BOD by 50% and 56%, and TSS at 24% and 21%. PH value changes due to the addition of coagulant positive effect on the level of the allowance, but a negative effect that is quite a lot of froth. The decline in organic load favorable for existing landfill leachate treatment systems Jatibarang.  Diponegoro University 2016-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/12647 TEKNIK; Vol 37, No 2 (2016): (Desember 2016) eng Copyright (c) 2016 Teknik

oai:ojs.ejournal.undip.ac.id:article/1760 2012-02-15T04:03:20Z teknik:ART

2460-9919 0852-1697 dc SISTEM INFORMASI JARINGAN IRIGASI (SIJARI) KABUPATEN SUKOHARJO BERBASIS PROGRAM ARCVIEW GIS 3.3. Sriyana, Sriyana SIJARI, ArcviewGIS. Data availability of irrigation area authority, discharge data, physical condition of weir, channel condition,hydraulic structure damage, finance needed for recovery etc are sometimes unclear, invalid and lost in data,low service and poor performance, resulting planning interest, monitoring implementation and controlunfulfilled. The purpose of this thesis is to make SIJARI software (Sistem Informasi Jaringan Irigasi )whichcontains data base information of Irrigation in Geographic Information System(SIG), based on Arcviewprogram GIS 3.3. The result of SIJARI software contains all data base information starting from irrigationarea authority, structures damage, channel condition, crop pattern etc, where all data can be fast andaccurately accessible and can be used for pre-plan, planning, implementation, monitoring and control. Diponegoro University 2012-02-02 14:41:15 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1760 TEKNIK; Volume 31, Nomor 1, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/31283 2021-06-03T02:06:57Z teknik:ART

"210503 2021 eng " 2460-9919 0852-1697 dc The Stability Analyze of KM. Rejeki Baru Kharisma of Tarakan – Tanjung Selor Route Alamsyah, Alamsyah Program Studi Teknik Perkapalan, Institut Teknologi Kalimantan Zulkarnaen, Zen Program Studi Teknik Perkapalan, Institut Teknologi Kalimantan Suardi, Suardi Program Studi Teknik Perkapalan, Institut Teknologi Kalimantan stability; capsize; loadcase; arm stability; safety; speed boat Stabilitas kapal yang tidak sesuai standar IMO akan membuat kapal terbalik saat beroperasi. Tujuan penelitian ini mengetahui penyebab terbaliknya kapal ditinjau dari kriteria stabilitas kapal. Metode yang digunakan yakni simulasi  software. Analisis stabilitas dilakukan dengan loadcase yang terjadi dilapangan ketika terjadi accident dan loadcase ideal menurut standar PM 104 2017 tentang penyelenggaraan angkutan penyebrangan. Hasil penelitian didapatkan muatan barang yang diletakkan di roof top (loadcase 1) berdasarkan kriteria Intact Stability ; luas kurva lengan stabilitas pada heeling 0° ~ 30° =  0.9417 m.deg, area 0° ~ 40° = 1.0200 m.deg, 30° ~ 40° = 0.0783 m.deg, nilai GZ pada heeling 30° = 0.029 m, sudut terjadinya GZ maksimum = 21.8°, dan nilai GMt awal = 0.135 m, hasil menyatakan semua tidak memenuhi kriteria Intact Stability code A.749, sedangkan untuk muatan barang yang diletakkan di cabin penumpang (loadcase 2) berdasarkan Intact Stability ; luas kurva lengan stabilitas pada heeling 0° ~ 30° = 4.5338 m.deg, area 0° ~ 40° = 7.1643 m.deg, area 30° ~ 40° = 2.6305 m.deg, nilai GZ pada heeling 30° = 0.265 m, sudut terjadinya GZ maksimum = 34.5°, dan nilai GMt awal = 0.621 m, hasil menyatakan semua memenuhi kriteria Intact Stability code A.749 Diponegoro University 2021-05-03 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/31283 TEKNIK; Vol. 42, No. 1 (2021): May 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4387 2013-01-22T02:50:02Z teknik:ART

"121015 2012 eng " 2460-9919 0852-1697 dc RECOVERY GARAM LITHIUM DARI AIR ASIN (BRINE) DENGAN METODA PRESIPITASI Sumarno, Sumarno Ratnawati, Ratnawati A. Nugroho, A. Nugroho Array Lithium demand increases as it is widely used as raw material for rechargeable battery, alloy for airplane, and fuel for fusion nuclear reactor. Lithium is an extremely reactive element, that it is never found as free element in nature. Lithium compounds are found in earth crust, with very small concentration (20 – 70 ppm) and total content of more than 20 million tons. The biggest lithium reserve is in seawater (0,14 – 0,25 ppm) and geothermal water (7 ppm) with total amount of 230 billion tons. There is no industry applies the technology to recover lithium from seawater. Having a vast sea area and abundant geothermal sources, Indonesia needs to develop a technology to recover lithium from both sources. This research is aimed to recover lithium from geothermal water. The experiment was conducted using synthetic and geothermal water with lithium concentration range of 220 – 400 ppm, temperature range of 20 – 40°C, and mixing time range of 1 – 4 hours. The experiment was designed with 2 level factorial design. The results show that the most influencing variable is mixing time, while significant interaction amongst variables is not observed. Further experiment using geothermal water from Bledug Kuwu with initial lithium concentration of 400 ppm and temperature 30°C resulted in optimum mixing time, i.e. 3 hours with 92,5% of the lithium could be recovered Diponegoro University 2012-07-12 10:30:29 https://ejournal.undip.ac.id/index.php/teknik/article/view/4387 TEKNIK; Volume 33, Nomor 2, Tahun 2012 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/58450 2025-04-17T01:00:27Z teknik:ART

"240830 2024 eng " 2460-9919 0852-1697 dc Hayuningsih, Dwi Mastuti Awaluddin, Moehammad Nugraha, Arief Laila Kabupaten Sragen adalah salah satu kabupaten di Jawa Tengah yang rawan terjadi kekeringan. Menurut Badan Nasional Penanggulangan Bencana, Kabupaten Sragen termasuk wilayah administrasi yang memiliki risiko bahaya kekeringan dengan tingkat risiko sedang hingga tinggi dan sebanyak 20 kecamatan memiliki potensi bahaya kekeringan. Berdasarkan kasus bencana kekeringan yang sudah terjadi di Kabupaten Sragen maka mendorong untuk pembuatan peta ancaman atau rawan kekeringan di Kabupaten Sragen. Penelitian ini bertujuan untuk mengetahui sebaran zona rawan kekeringan di Kabupaten Sragen dan mengetahui hasil akurasi peta ancaman kekeringan dengan data kekeringan di Kabupaten Sragen yang dimiliki oleh BPBD Kabupaten Sragen. Model ancaman kekeringan di Kabupaten Sragen diperoleh dari penjumlahan hasil kali nilai x skor semua parameter sehingga diperoleh bobot total, metode ini disebut Analytical Hierarchy Process (AHP). Penelitian ini menggunakan enam parameter antara lain curah hujan, penggunaan lahan, jenis tanah, kemiringan lereng, sumber air permukaan, dan struktur geologi. Berdasarkan hasil spasial analisis dengan menggunakan metode intersection, maka diperoleh tiga kelas klasifikasi ancaman kekeringan di Kabupaten Sragen, wilayah dengan tingkat ancaman kekeringan sedang seluas 63.277 km2 dengan persentase 6,389%, dengan potensi ancaman kekeringan kelas tinggi seluas 399.315 km2 (40,316%) sedangkan kelas sangat tinggi sebesar 295.364 km2 dengan persentase 53,295%. Sehingga dapat disimpulkan mayoritas wilayah di Kabupaten Sragen pada tingkatan sangat tinggi untuk ancaman bencana kekeringan. Berdasarkan hasil akurasi peta ancaman kekeringan dengan data kejadian kekeringan BPBD Kabupaten Sragen diperoleh kesesuaian sebesar 100% dengan dilakukannya validasi berupa wawancara dengan beberapa warga, petugas kecamatan, dan relawan. Diponegoro University 2024-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/58450 TEKNIK; Vol 45, No 2 (2024): August 2024 ind Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/14945 2020-04-17T09:35:50Z teknik:ART

"180731 2018 eng " 2460-9919 0852-1697 dc Stabilisasi Tanah Lempung Ekspansif dengan Menggunakan Campuran Soda Api (NaOH) pada Tanah Dasar di Daerah Godong - Purwodadi Km 50 Kabupaten Grobogan Pardoyo, Bambang Departemen Teknik Sipil Fakultas Teknik, Universitas Diponegoro Wardani, Sri Prabandiyani Retno Departemen Teknik Sipil Fakultas Teknik, Universitas Diponegoro Partono, Windu Departemen Teknik Sipil Fakultas Teknik, Universitas Diponegoro expansive clay , NaOH , Modified Proctor , swelling pressure , swelling potential , CBR An expansive clay is soil material that is composed of various minerals include kaolinite, montmorillonite and illite group. Mineral montmorilinite have the sensitivity to the effects of the water is very easy to swell and shrink. High and low levels of swelling and shrinkage (shrinkage) expansive clay is determined by the high and low content of montmorillonite on expansive clay granules. Because of these properties are very high content of montmorillonite often cause problems in the building. This study uses a solution of Soda Api (NaOH) as a stabilizer through the compaction process Modified Proctor on (OMC + 7,5%)  Proctor standard by the number of collisions each - each is 10 x, 25x and 56x, and the amount of additional water on weight soil  dry , with variations in increments of  water by 95% : 5% NaOH, water by 90%: 10% NaOH and water by 85% : 15% NaOH. This research was conducted testing - testing in the laboratory include: Index properties, Swelling Pressure, Swelling Potential and CBR with curing and no curing. Results - results in these tests show that the value of the property index showed an increase, Test UCS showed an decrease, Test CBR by soaking at the age of 7 days with a mixture of caustic soda 10% showed the best results, while the pressure test expands and Test Potential expands decreased significant. Diponegoro University 2018-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/14945 TEKNIK; Vol 39, No 1 (2018): (July 2018) eng Copyright (c) 2018 Teknik

oai:ojs.ejournal.undip.ac.id:article/1870 2012-02-15T03:26:54Z teknik:ART

2460-9919 0852-1697 dc PENYUSUNAN RENCANA INDUK PENANGANAN KAWASAN RAWAN BENCANA DI KABUPATEN SINTANG, KALIMANTAN BARAT Najib, Najib Krisna Hidayat, Wahju flood, landslide, geographic information system Sintang Residence is a region which has susceptible region of natural disaster mainly landslide and flood.As the result of that vulnerability, it is needed to do the research to determine zonation of susceptibility ofdisaster. Zonation of landslide is based on four parameters such as slope, annual rainfall, geology factorsand land use. Zonation of flood is based on monthly/daily rainfall, land use, topographic condition andflood terrains. Based on secondary data and primary data, Sintang residence can be divided into threesusceptibility landslide zones, i.e. intermediate, low and very low susceptible landslide zones. Susceptibleflood zones are divided into three zones i.e. high, intermediate and low susceptible flood zone. Landslidesin that area are happened due to some factors; among other things are the rocks weathered, high slopedirection and no retaining wall. Flood is happened mostly due to the position of residences which straightforward or less height toward river water level and that location near with the rivers. Flood occupied theresidences mostly pass terrain edge river or pass by Sub River or rubbish ditch that ended in the mainriver. The purposes of mitigation those disasters based on the land use Diponegoro University 2012-02-02 14:36:47 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1870 TEKNIK; Volume 30, Nomor 2, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/40242 2021-12-16T21:29:52Z teknik:ART

"211217 2021 eng " 2460-9919 0852-1697 dc Windarta, Jaka Diponegoro University https://www.profildosen.com/detail/0026056407.html https://orcid.org/0000-0003-1042-5064 Handoko, Susatyo Irfani, Khilmi Nafadinanto Masfuha, Sunan Muqtasida Itsnareno, Candra Halim Distribusi listrik dari Perusahaan Listrik Negara (PLN) belum tentu mencapai daerah daerah terpencil, sehingga daerah tersebut memerlukan sumber listrik alternatif seperti Pembangkit listrik Tenaga Surya (PLTS). Penelitian kali ini memiliki tujuan untuk merancang dan menganalisis PLTS Off-grid skala kecil dengan studi kasus UMKM Coffeeshop ditinjau dari analisis teknis dan ekonomi. Metode penelitian yang digunakan adalah dengan melakukan perbandingan dengan menggunakan desain 2 merk panel surya kapasitas 720Wp dan 2 merk baterai kapasitas 160Ah menggunakan software PVSyst 7.0. Dari hasil simulasi didapatkan jumlah energi tersuplai paling banyak pada variasi 3 sebesar 674,51 kWh/tahun. Selain itu dilakukan analisis ekonomi dengan tujuan untuk membandingkan sisi ekonomis PLTS dengan alternatif sumber listrik lain seperti genset dan penggunaan baterai dengan charging dari PLN. Berdasarkan simulasi software RetScreen, nilai Net Present Value (NPV) pada semua variasi diperoleh nilai negatif ( < 0 ), akan tetapi penggunaan PLTS off-grid adalah yang paling menguntungkan jika dibandingkan dengan penggunaan genset atau sumber listrik baterai dengan pengisian daya dari  PLN. Diponegoro University 2021-12-17 04:29:52 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/40242 TEKNIK; Vol 42, No. 3 (2021): December 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/6981 2014-12-24T02:20:43Z teknik:ART

"141202 2014 eng " 2460-9919 0852-1697 dc PEMANFAATAN PEMETAAN TEMATIK UNTUK ANALISIS KEBOCORAN JARINGAN PIPA DISTRIBUSI DI PDAM DEMAK Sudarsono, Bambang Staf Pengajar Jurusan Teknik Geodesi Fakultas Teknik Universitas Diponegoro Nugraha, Arief Laila Staf Pengajar Jurusan Teknik Geodesi Fakultas Teknik Universitas Diponegoro Array Problems that are often faced by water companies, particularly in PDAM Demak are water leaks in the distribution channel. The problem became a threat resulting considerable loss to PDAM Demak. The problem requires a solution to help the PDAM Demak to analyze the distribution pipelines become more optimal. One method used to solve the pipeline leakage in the distribution network PDAM Demak is doing thematic mapping distribution pipeline represents the actual field conditions. Furthermore the results of thematic mapping is processed through Geographic Information Systems (GIS) can be simulated distribution of water flow conditions to determine the level of water leakage occurs. Simulation results , which is done through software EPANET 2.0, a reference to find out which areas have a tendency to water leaks. The area can be mapped on a thematic map that has been built so as to provide information areas prone to leak water in PDAM Demak. Thematic mapping of distribution pipeline is done by GPS navigation survey. The mapping produces a thematic maps as a basemap for water distribution simulation process. Simulation results illustrate that the village Sidomulyo into areas prone to water leakage with the highest rate of water loss is 24,50% from 44.022 m3of water production in December 2012. Diponegoro University 2013-12-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/6981 TEKNIK; Volume 34, Nomor 3, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/72798 2025-11-17T01:02:24Z teknik:ART

"251117 2025 eng " 2460-9919 0852-1697 dc Analysis of Energy Use Intensity (EUI) Factors in Government Office Buildings in Tropical Climate: A Case Study in the Ministerial Office Building and the Directorate General of Water Resources Building of The Ministry of Public Works Kusumastuti, Diana Doctoral Program in Architectural and Urban Science, Universitas Diponegoro, Jl. Prof. Soedarto, S.H., Tembalang, Semarang, Indonesia, 50275 Setyowati, Erni Architecture Study Program, Faculty of Engineering, Universitas Diponegoro, Jl. Prof. Soedarto, S.H., Tembalang, Semarang, Indonesia, 50275 Sari, Suzanna Architecture Study Program, Faculty of Engineering, Universitas Diponegoro, Jl. Prof. Soedarto, S.H., Tembalang, Semarang, Indonesia, 50275 Dwiyanto, Agung Architecture Study Program, Faculty of Engineering, Universitas Diponegoro, Jl. Prof. Soedarto, S.H., Tembalang, Semarang, Indonesia, 50275 energy use intensity; EUI; government office buildings; energy efficiency; tropical climate Energy Use Intensity (EUI) is a key indicator for evaluating the energy efficiency of buildings. This study aims to analyze the EUI factors in two government office buildings: the Ministerial Office (MO) building and the Directorate General of Water Resources (DGWR) building of The Ministry of Public Works. Both are located in close proximity and share similar physical characteristics under tropical climate. The EUI is analyzed using the walkthrough audit method as a practical approach for assessing energy performance. The results show that the DGWR Building exhibits higher energy consumption, primarily due to the dominance of cooling loads accounting for 54.13% of the total EUI, compared to 46.54% at the MO building.  There are three main factors contributing to the EUI variation include: (i) heating, ventilation, and air conditioning (HVAC) system – the water-cooled chiller used in the MO building shows higher efficiency compared to the air-cooled chiller system installed in the DGWR building; (ii) Overall Thermal Transfer Value (OTTV) – although both buildings utilize similar envelope materials, the OTTV value in DGWR building is significantly higher due to its larger window-to-wall ratio (WWR), which increases heat gain through the facade; and (iii) Lighting – while there is no significant difference in total installed lighting power, the higher lighting power density (LPD) in DGWR building contributes to a greater lighting energy load per unit area. Additionally, the implementation of smart lighting systems in MO building contributes to better energy efficiency performance. Diponegoro University 2025-11-17 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/72798 TEKNIK; Vol 46, No 3 (2025): Juli 2025 eng Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/21742 2020-04-17T09:37:48Z teknik:ART

"191111 2019 eng " 2460-9919 0852-1697 dc Winarno, Tri Diponegoro University Gunawan, Yeremia Billy Agustha Marin, Jenian Semburan lumpur Sidoarjo mengeluarkan volume sebesar ±80.000 m3setiap hari dan hanya dapat diatasi ±60.000 m3 dengan cara mengalirkannya ke laut melalui Kali Porong. Surplus endapan lumpur tersebut meluap dan menggenangi daerah di sekitar pusat semburan lumpur sehingga menimbulkan masalah. Artikel ini memuat analisis mineralogi dan kandungan kimia dari endapan lumpur Sidoarjo sehingga dapat dimanfaatkan sesuai karakteristiknya. Sampel lumpur dinalisa menggunakan metode X-Ray Diffraction (XRD) dan X-Ray Fluorescence (XRF) untuk mengetahui mineralogi dan kandungan kimianya. Genesis dari endapan Lumpur Sidoarjo diinterpretasikan berasal dari batuan sedimen vulkaniklastik Formasi Kalibeng Atas yang bercampur dengan endapan Aluvial (Qa) karena mineral-mineral lempung yang dijumpai didominasi oleh mineral montmorillonit. Keberadaan Zona Sesar Watukosek yang memanjang dari Kompleks Gunungapi Arjuno-Welirang diinterpretasikan memberikan kontrol struktur terhadap pembentukan gunungapi lumpur Sidoarjo. Pemanfaatan endapan Lumpur Sidoarjo berdasarkan mineralogi dan kandungan kimianya dikelompokkan menjadi lima bidang, yaitu kesehatan, pertanian, perikanan, industri, dan kosmetik. Setiap bidang pemanfaatan membutuhkan mineral-mineral lempung khusus sehingga endapan Lumpur Sidoarjo harus diolah terlebih dahulu untuk menghilangkan unsur pengotor, mineral berat, pengecilan ukuran, peningkatan kemampuan absorpsi, dan kapasitas tukar kation. Diponegoro University 2019-11-11 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/21742 TEKNIK; Vol 40, No. 2 (2019): Agustus 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/7264 2015-10-17T03:39:04Z teknik:ART

"150704 2015 eng " 2460-9919 0852-1697 dc PENGARUH ACTIVITY SUPPORT TERHADAP KAWASAN PECINAN SEMARANG DI MALAM HARI Anugeraheni, Stella Prita Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang Rukayah, R. Siti Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang Setioko, Bambang Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang Array Koridor Gang Warung merupakan koridor yang berada di kawasan perdagangan dan jasa ini terletak di kawasan pecinan yang merupakan kawasan bersejarah yang juga dikenal dengan sebutan “seribu kelenteng”. Keadaan lingkungan ini memiliki perbedaan pada saat malam hari. Keberadaan activity support pada malam hari berupa Waroeng Semawis merupakan salah satu kegiatan pendukung yang memiliki tujuan yakni mengembalikan fungsi kawasan pada malam hari yang mempengaruhi pada karakter visual yang muncul dari bangunan sekitarnya. Penelitian ini memiliki tujuan untuk mengetahui pengaruh activity support berupa bazaar malam terhadap karakter visual kawasan pecinan. Metode yang digunakan adalah metode kuantitatif rasionalistik dengan menggunakan analisa deskriptif dan pengujian regresi karena tujuan dari penelitian ini adalah menggali informasi mengenai pengaruh kegiatan activity support. Metode ini digunakan karena adanya perbedaan penilaian dan persepsi individu terhadap karakter visual yang disebabkan oleh activiy support pada malam hari. Adanya activity support berupa Waroeng Semawis dapat memberikan kontribusi dalam pengenalan karakter pecinan di koridor gang warung ini dengan keramaian dan beberapa kegiatan di dalamnya, yang tentunya diperkuat dengan adanya pencahayaan yang berasal dari kios, sehingga memunculkan kegiatan yang memberi kesan penciptaan karakter visual kawasan. [Influence of Activity Support Towards Visual Characteristic of Chinatown at Night] Gang Warung corridor is a corridor in the area of trade and services, that located in the Chinatown area which is a historical district which is also known as the "thousand temples". It has a different environmental conditions during the night. The existence of support activity at night in the form of Waroeng Semawis is one of the supporting activities that have the purpose of restoring the function of the area at night which affect the visual character of the surrounding buildings appear. This study has the purpose to determine the effect of a support activity to the night bazaar area of the visual character of Chinatown. Quantitative is the method used with rationalistic method using descriptive analysis and regression testing for the purpose of this study is to explore the influence of information on the activities of the activity support. This method is used because of differences in assessment and individual's perception of the visual character caused by activity support during the night. The existence of a activity support, Waroeng Semawis can contribute in Chinatown characteristic recognition in this shop alley corridor with the crowd and some of the activities in it, which is certainly reinforced by the lighting coming from the stall. Giving rise to activities that provide for the creation of visual character of the area. Diponegoro University 2015-07-04 16:42:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/7264 TEKNIK; Vol 36, No 1 (2015): (Juli 2015) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1687 2012-02-10T07:42:07Z teknik:ART

2460-9919 0852-1697 dc APLIKASI METODE GEOMAGNET DALAM EKSPLORASI PANASBUMI Broto, Sudaryo Geophysics is a part of earth science that studies the Earth using the rules or principles of physics. Geophysicalmethods are divided into several methods, namely: gravity method, geomagnet, seismic, geoelectric andgeoradar.Geothermal energy is stored in the form of hot water or steam at a certain geological conditions at depth.Geothermal system is an area of geothermal or geothermal field is an area on the surface of the earth within acertain limit where there is geothermal energy in a certain rock hydrology. Geothermal manifestations consistof: ground hot, steaming ground, hot tubs, hot mud pools, hot springs, fumaroles, geysers, silica sinter.Fault is a fracture rock mass shift relative one part against another. Fault structure is associated withgeothermal manifestations, because the manifestations that came out to the surface because of the fault beneaththe surface.From the results of investigations in the area geomagnet Jaboi, magnetic anomalies were divided into three,namely anomaly is very low with values between -600s/d200 nT anomaly as strongly altered rock and weatheredrock; low anomaly with values> -200s/d300 nT as alluvial and pyroclastic rocks ; high anomaly with valuesbetween> 300s/d700 nT as a rock rhiolit / dacite volcanic and fresh. Geothermal potential area is the area oflow magnetic anomaly values in the presence of manifestations of hot water and is controlled by the fault. Diponegoro University 2012-02-02 14:47:08 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1687 TEKNIK; Volume 32, Nomor 1, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/24709 2020-07-10T16:18:59Z teknik:ART

"200531 2020 eng " 2460-9919 0852-1697 dc Royani, Ahmad Research Center for Metallurgy and Materials - Indonesian Institute of Sciences Priyotomo, Gadang Gunawan, Hadi Triwardono, Joko Nuraini, Lutviasari Prifiharni, Siska Nugraha, Heri Sugiarti, Sugiarti Sundjono, Sundjono Penelitian ini bertujuan untuk mempelajari korosi pada baja galvanis setelah diekspos di Sungai Cidaho Wilayah Sukabumi, Jawa Barat. Kehilangan berat baja galvanis diukur dengan metode pengurangan berat setelah diekspos untuk periode waktu tertentu di permukaan air sungai dan kedalaman air 1 meter. Morfologi permukaan dan komposisi produk korosinya dianalisismenggunakan Scanning Electron Microscopy (SEM) - Energy Dispersive Spectroscopy (EDS) dan X-Raya Diffraction (XRD). Setelah diekspos, seluruh permukaan baja galvanis tertutup oleh produk korosi. Hasil berat yang hilang dari baja galvanis setelah diekspos 76 hari adalah 1,37 mg/cm2 pada permukaan air sungai dan 7,83 mg/cm2 untuk kedalaman air 1 meter. Peningkatan kerusakan dari baja galvanis ini terjadi karena tidak terbentuk lapisan protektif akibat tergerus arus sungai. Produk korosi yang dominan pada baja galvanis yang diekspos pada kedalaman 1 meter adalah senyawa Zincite (ZnO). Hasil ini mengindikasikan bahwa penggunaan baja galvanis tidak cocok untuk lingkungan di kedalaman air Diponegoro University 2020-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/24709 TEKNIK; Vol 41, No. 1 (2020): May 2020 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/24709/69359 Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2072 2012-02-22T02:56:49Z teknik:ART

2460-9919 0852-1697 dc MESIN PENGERING KAYU SEDERHANA UNTUK HOME INDUSTRI Murni, Murni Dryer machine of wood, home industry Dryer machine of wood is made to fulfill need of wood in order to produce raw of drying wood is notdepended weather. Making of dryer of wood usually requiree investment cost more expensive . it is heavyfor home industry .Inovation of simple dryer machine is done with flowing steam naturally and base onanalyzing it shows that drying can achieve moistur content 12 persen Diponegoro University 2012-02-10 11:26:10 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2072 TEKNIK; Volume 28, Nomor 1, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/45512 2023-06-25T22:39:35Z teknik:ART

"230531 2023 eng " 2460-9919 0852-1697 dc Jaya, Indra Department of Civil Engineering, Universitas Sumatera Utara, JL. Perpustakaan, Kampus USU, Medan 20155. Hasibuan, Gina Cynthia Raphita Nasution, Dian Morfi Pejabat Pembuat Komiten (PPK) merupakan utusan dari pemerintah dalam menjalankan kegiatan konstruksi mulai dari perencanaan, pelaksanaan, dan pengawasan. Dalam menjalankan kegiatannya diperlukan suatu manajemen komunikasi yang baik agar seluruh kegiatan proyek dapat dipertanggungjawabkan dengan baik. Penelitian ini menggunakan pendekatan kualitatif, menggunakan metode wawancara mendalam semi-terstruktur (semi-structured in-depth interview) kepada PPK tentang bagaimana sistem manajamen komunikasi di saat sebelum pandemi dan saat pandemi sedang berlangsung. Permasalahan yang ditemukan saat ini adalah sistem manajemen komunikasi proyek belum terlaksana dengan baik. Hal ini terbukti dengan adanya hal-hal yang tidak sesuai harapan PPK ketika menghadapi dan mengarahkan penyedia barang dan jasa. Untuk mendukung sistem manajemen komunikasi yang baik diperlukan suatu sistem terintegrasi mulai dari pembuatan firma/perusahaan, verifikasi lapangan dalam pemilihan penyedia jasa, evaluasi perpanjangan izin perusahaan. Ini bertujuan agar pengguna jasa mendapatkan calon penyedia jasa yang tepat dan, sesuai harapan. Untuk itu diperlukan sistem informasi teknologi yang mampu mengintegrasikan seluruh mekanisme yang dibuat. Selain itu diperlukan payung hukum terkait adanya usulan dan mekanisme baru yang dibuat. Diponegoro University 2023-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/45512 TEKNIK; Vol. 44, No. 1 (2023): May 2023 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/45512/142321 Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/11271 2020-04-17T09:31:39Z teknik:EI

"160730 2016 eng " 2460-9919 0852-1697 dc Front-matter Istadi, Istadi bcrec Diponegoro University 2016-07-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/11271 TEKNIK; Vol 37, No 1 (2016): (Juli 2016) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1748 2012-02-15T04:03:20Z teknik:ART

2460-9919 0852-1697 dc PENGARUH UKURAN UTAMA KAPAL TERHADAP DISPLACEMENT KAPAL Utomo, Budi displacement of ships Displacement is weight water which is replaced ship hull. The displacement influenced by dimension of inmerchant ship. The displacement musat be small as posible, but the capacity and the speed must be pullfill.Dsplacement can be obtained by formulation or by experiment in hydrodinamika laobatory, the modelingcharacteristic us descube the real Calculation of the ship.The form of the ship must give the resistaise as small as posible. In athe hard the capacity must be full fill ofload Diponegoro University 2012-02-02 14:41:15 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1748 TEKNIK; Volume 31, Nomor 1, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/33710 2021-05-06T06:54:02Z teknik:ART

"201201 2020 eng " 2460-9919 0852-1697 dc Technical and Economic Analysis of Ship Launching with Slipway and Airbag KM. Sabuk Nusantara 72 in PT. Janata Marina Indah Shipyard Semarang Sugeng, Sunarso Department of Industrial Technology, Vocational School, Diponegoro University Ridwan, Mohammad Department of Industrial Technology, Vocational School, Diponegoro University Suharto, Suharto Department of Industrial Technology, Vocational School, Diponegoro University Khristyson, Samuel Febriary Department of Mechanical Engineering Faculty of Engineering, Diponegoro University : technical and economic analysis; ship launching; slipway; airbag; KM. Sabuk Nusantara 72 In a ship planning can not be separated from the planning of the ship launching process. A ship can glide perfectly if it has a high enough planning time and costs. The launch process itself is divided into several ways. The choice of this method needs to be considered because it relates to the budget and preparations made. The method used is the calculation according to the numerical approach assisted by computational software. In the first calculation it is planned with the slipway launch, and then the next one is planned with the airbags that have been implemented previously. The purpose of this study is to provide analysis results as a consideration in implementing the slipway and airbag ship launching method on KM ships. Belt Nusantara 72 measuring 2000 DWT. In steps 5 to 6, both the slipway and the airbags experience a stern lift condition with a value (yVd) of 1396.97 ton.  Based on the economic analysis of the hours of people using airbags, there is a decrease in working hours by 44% when compared to the launch using a slipway. This also happened to work productivity where it was 84% more time effective. When viewed from an investment point of view, the use of slipways is actually more economical than airbag, the difference is 43% more economical using slipways. Both types of launch can be applied by looking at the economical side and the ability of each shipyard in carrying out the launching process and seeing the main size of the ship to be launched. Diponegoro University 2020-11-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/33710 TEKNIK; Vol 41, No. 3 (2020): December 2020 eng Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/3793 2012-07-18T08:47:52Z teknik:ART

"120409 2012 eng " 2460-9919 0852-1697 dc STUDI GEOKIMIA AIR PANAS AREA PROSPEK PANASBUMI GUNUNG KENDALISODO KABUPATEN SEMARANG, PROVINSI JAWA TENGAH Aribowo, Yoga Nurohman, Heri Array Fluid geochemistry is a useful method to analyse lateral and vertical processes and trends in a geothermalsystem, just like a blood and urine analysis to determine the functions of internal organs in human body. Fluidsgeochemistry study in Kendalisodo Geothermal Prospect has conducted to get information about type andcharacteristics of fluids, to predict reservoir temperature, and sub surface hidrogeochemical cycle model.From fluids geochemistry analysis, the most significant constituent is HCO3, and thus all fluids classified intobicarbonate water. Based on gethermometry analysis, the average reservoir temperature calculated is about175oC and classified into medium enthalpy system. Diponegoro University 2012-07-12 10:29:15 https://ejournal.undip.ac.id/index.php/teknik/article/view/3793 TEKNIK; Volume 33, Nomor 1, Tahun 2012 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/60810 2025-04-24T18:11:04Z teknik:ART

"240613 2024 eng " 2460-9919 0852-1697 dc Implikasi Integrasi BIM dan ERP Terhadap Pengendalian Volume Pekerjaan Proyek: Studi Kasus Proyek Bendungan Wibowo, Muhammad Agung Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro Hatmoko, Jati Utomo Dwi Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro Satria, Gildam Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro BIM; ERP; biaya; kendali; integrasi; bendungan Penggunaan informasi volume dari Building Information Modeling (BIM) pada proyek konstruksi di Indonesia belum efektif dalam meningkatkan kinerja pengendalian anggaran meskipun BIM telah menunjukkan dampaknya terhadap peningkatan kinerja proyek konstruksi bangunan. Salah satu upaya yang dilakukan untuk meningkatkan efektivitas penggunaan informasi BIM adalah dengan mengintegrasikan informasi BIM dengan Enterprise Resource Planning (ERP) dimana ERP sangat membantu dalam pengambilan keputusan. Penelitian ini bertujuan untuk mengevaluasi integrasi informasi BIM BIM dan ERP pada proyek konstruksi dengan studi kasus pada proyek bendungan. Metode penelitian yang digunakan adalah observasi terkait penggunaan informasi volume dari BIM untuk pengendalian anggaran, wawancara mendalam dengan pihak-pihak terkait dalam proyek dan pada kantor pusat pada proyek bendungan dan mengukur informasi volume dari proses BIM dibandingkan dengan anggaran dan menilai seberapa akurat informasi volume tersebut sehingga dapat diandalkan untuk pengendalian volume pekerjaan. Hasil penelitian ini diharapkan dapat memberikan kontribusi dalam penerapan BIM yang efektif untuk pengendalian anggaran melalui integrasi ERP pada proyek bendungan dan menjadi acuan bagi pengambil keputusan dalam upaya meningkatkan kinerja proyek konstruksi. Diponegoro University 2024-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/60810 TEKNIK; Vol. 45, No. 1 (2024): May 2024 eng https://ejournal.undip.ac.id/index.php/teknik/article/download/60810/195869 Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/11799 2020-04-17T09:34:16Z teknik:ART

"171229 2017 eng " 2460-9919 0852-1697 dc Mekanisme Kebijakan Standard Ketahanan Gempa Baru pada Bangunan Publik Hermawan, Ferry Departemen Teknik Sipil, Universitas Diponegoro https://undip.academia.edu/FerryHERMAWAN Indarto, Himawan Departemen Teknik Sipil, Universitas Diponegoro mekanisme kebijakan; retrofit; gedung; rumah sakit umum Penerapan standard bangunan tahan gempa baru pada penelitian ini adalah bagian dari mekanisme kebijakan teknis dan harmonisasi kepentingan dari para praktisi gedung di daerah. Persoalan teknis di lapangan menuntut adanya integrasi komitmen antara praktisi gedung dan pemilik proyek. Jika suatu penerapan standard bangunan terjadi saat gedung sedang dibangun maka perlu mekanisme kebijakan yang dapat mengharmonisasi kepentingan teknis dan administrasi proyek. Penelitian ini merupakan bukti empirik bagaimana mekanisme kebijakan retrofit bangunan pasca penerapan SNI bangunan tahan gempa baru diterapkan pada bangunan rumah sakit umum di Jawa Barat. Metode penelitian yang digunakan adalah menggunakan simulasi model struktur dan wawancara semi-structured dengan enam praktisi gedung yang telah berpengalaman antara 15-25 tahun. Hasil simulasi model struktur diperoleh bahwa beberapa elemen struktur harus dilakukan retrofit untuk meningkatkan kapasitas terhadap beban gempa baru yang relatif meningkat dua kalinya dari standar gempa lama. Hasil penelitian menunjukkan bahwa, keberhasilan penerapan standard gedung tahan gempa baru dipengaruhi oleh mekanisme komunikasi dan pengalaman kontraktor yang memadai pada eksekusi di lokasi. Interaksi antara pemilik proyek, kontraktor, dan tim manajemen konstruksi adalah bentuk mekanisme yang bisa dikembangkan terutama bagi praktisi gedung di daerah dengan keterbatasan sumber daya teknologi dan keterampilan. Diponegoro University 2017-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/11799 TEKNIK; Vol 38, No 2 (2017): (Desember 2017) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1861 2012-02-15T03:26:54Z teknik:ART

2460-9919 0852-1697 dc KUANTITAS DAN KUALITAS RUANG TERBUKA HIJAU DI PERMUKIMAN PERKOTAAN Dwiyanto, Agung open space, enviromental deterioration & comunity effort Green Air-Gap management in area of settlement urban tend to to experience of the challenge which enough weightof effect about height of urbanization current. while on the other side, energy support the downhill existing socialand environment also, so that cannot make balance to the requirement of space of effect about human pressure .Other challenge go together the height mount the conversion or displace to utilize the farm from farm (especiallyagriculture farm become the area develop;builded) generating impact to lowering environmental quality nyabecome green of urban. Evaluate the planology is exist in generally only study the aspect of accuracy or deviation ofspace according about zoning which already specified . Meanwhile its exploiting intensity change seldom debate, sothat need the new stages;steps to improve;repair the quality and existing amount green space. Diponegoro University 2012-02-02 14:36:47 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1861 TEKNIK; Volume 30, Nomor 2, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/40841 2021-08-29T17:46:58Z teknik:EI

"210826 2021 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi front-matter TEKNIK Volume 42 Nomor 2 Tahun 2021, yaitu meliputi halaman sampul, fokus dan ruang lingkup TEKNIK, informasi indeksasi, susunan tim penyunting dan mitra bebestari, kata pengantar editor dan daftar isi.  Diponegoro University 2021-08-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/40841 TEKNIK; Vol. 42, No. 2 (2021): August 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/52931 2023-10-12T21:21:38Z teknik:ART

"230830 2023 eng " 2460-9919 0852-1697 dc Production and Characterization of Silencer Composite Materials From Natural Fiber Using Hand Lay-Up Methods Sadik, Rifnaldi Department of Industrial Engineering, Vocational School, Universitas Diponegoro Amalia, Rizka Department of Industrial Engineering, Vocational School, Universitas Diponegoro https://orcid.org/0000-0002-6578-9757 hand lay-up; composite; matrix; natural fibers; transmission loss Noise pollution is a loud sound emitted by a device that can disturb the environment and living things. Therefore, development is needed to manufacture sound absorbers with aesthetic value and comfort and still have good sound absorption from natural fiber composite materials. Composites are materials that can be developed universally. Composites are formed from the combination of two or more materials, producing a new material with different mechanical properties and characteristics from its constituent materials. This research aims to make sound absorption composites from various natural fibers (honey pineapple leaf fiber, spiked pandanus leaf fiber, and jute waste fiber) and matrix variations (epoxy and polyester) with a fiber = resin ratio of 40%: 60% and 60%: 40%. The first treatment was alkalization with 5% NaOH for fiber retrieval, then mixing natural fibers and matrix variations with the Hand Lay-Up method. The transmission loss method, density test, and SEM carried out the sound absorption test. The results showed that the best sound-absorbing composite was the spiked pandanus leaf fiber with polyester resin with a ratio of 60% fiber = resin: 40%, where the transmission loss results reached 28 dB. This is because the fiber dominates the resin to form a hole or porosity; increasing porosity affects the sound absorption ability of a material. Diponegoro University 2023-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/52931 TEKNIK; Vol. 44, No. 2 (2023): August 2023 eng https://ejournal.undip.ac.id/index.php/teknik/article/download/52931/169761 https://ejournal.undip.ac.id/index.php/teknik/article/download/52931/169762 https://ejournal.undip.ac.id/index.php/teknik/article/download/52931/169763 Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/67383 2025-07-07T19:46:40Z teknik:TE

"250322 2025 eng " 2460-9919 0852-1697 dc IoT and Machine Learning-Based Electric Vehicle Development Strategy to Maximize Vehicle Life and Promote Green Mobility Candraningtyas, Callista Fabiola Department of Environmental Science, Faculty Mathematics and Natural Science, Universitas Sebelas Maret, Jl. Ir. Sutami, Jebres, Surakarta, Indonesia 57126 https://orcid.org/0009-0004-8874-1651 Maulana, Fikri Arkan Achmad, Alles Anandhita Electric Vehicles; Internet of Things; Green Mobility; Machine Learning; Sustainable Transportation This research explores innovative strategies for developing electric vehicles based on the Internet of Things (IoT) and Machine Learning with the aim of maximizing service life and encouraging green mobility. In the face of the climate crisis and the increasing need for sustainable energy, electric vehicles offer a potential solution to reduce carbon emissions in the transportation sector. However, the challenges of optimizing battery life and energy efficiency require new, smarter and more connected approaches. This research integrates IoT technology with machine learning to create a more efficient electric vehicle ecosystem. This technology enables extended battery life through better usage management, increased energy efficiency through operational optimization, and predictive maintenance that reduces vehicle downtime. The research methodology includes testing prototypes of electric vehicles equipped with IoT technology, field trials to collect performance data, comprehensive analysis, and data processing to evaluate the effectiveness of the implemented strategies. The research results show that the integration of IoT and Machine Learning in electric vehicles can significantly increase battery life, energy efficiency, and make a positive contribution to green mobility. This development strategy is expected to advance electric vehicle technology in Indonesia, reduce dependence on fossil fuels, and create a cleaner and more sustainable environment. Diponegoro University 2025-02-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67383 TEKNIK; Vol 46, No 1 (2025) January 2025 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/67383/223332 Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/22056 2020-04-17T09:38:42Z teknik:ART

"190531 2019 eng " 2460-9919 0852-1697 dc Application of Interpretation of Roger’s Ratio, Duval’s Triangle Methods, Breakdown Test, Water Content Test for Feasibility Transformer Oil Diagnostic Syakur, Abdul Department of Electrical Engineering, Faculty of Engineering, Diponegoro University http://abdulsyakur.blog.undip.ac.id Lazuardi, Wildan DGA; dissolve gas in oil; transformer oil; Roger’s Ratio, Duval’s Triangle. Transformator merupakan peralatan utama dalam pemasokan listrik dari unit pembangkitan menuju konsumen. Oleh karena itu, perlu perhatian khusus dalam pemeliharaan kinerja transformator agar tidak terjadi kerusakan pada transformator. Selama trasformator beroperasi maka minyak transformator akan mengalami pembebanan berupa beban elektris dan termal yang dapat menyebabkan timbulnya gas-gas hidrokarbon terlarut pada minyak yang berpotensi menyebabkan gagalnya minyak sebagai fungsi isolasi yang baik. Karenanya diperlukan pemantauan khusus terhadap gas-gas tersebut. Salah satu cara untuk menganalisis gas terlarut dalam minyak adalah dengan menggunakan metode Dissolved Gas Analysis (DGA). DGA akan mengekstraksi gas tersebut untuk diketahui indikasi gangguan berdasarkan hasil interpretasi data gas-gas hidrokarbon terlarut yang dilakukan. Metode ini juga mampu memprediksi kerusakan jangka panjang, sehingga kerusakan pada transformator dapat dicegah. Hasil analisis DGA pada transformator menghasilkan indikasi berupa Discharge of thermal fault yang didapat dari hasil intrepetasi data menggunakan metode Rasio Roger dan Segitiga Duval. Selain itu, hasil pengujian breakdown voltage menunjukkan kondisi minyak yang masih baik yaitu kekuatan dielektrik > 50 kv dan pengukuran water content juga masih baik yaitu sebesar < 25 ppm. Diponegoro University 2019-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/22056 TEKNIK; Vol 40, No. 1 (2019): Mei 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1921 2012-02-24T11:23:19Z teknik:ART

2460-9919 0852-1697 dc ANALISIS KUALITAS PENGAMATAN DATA PASUT BERDASARKAN PERBANDINGAN KOMPONEN PASUT DAN SIMPANGAN BAKU Prasetyo, Yudo Amplitude, Harmonic, Quality, Phase, Tide Tide harmonic constanta is 2 kind of constant parameters (amplitude and phase) with periodic phase fromthe truly tide in equilibrium tide. The quality of tide data processing can be look in the standard deviationvalue of tide harmonic constanta. The standard deviation value decreasing is indicate that tide dataprocessing have a good data quality processing, contrary the standard deviation value increasing isindicate that tide data processing have a bad data quality processing. Depend on range of data observationtime (1 month,3 month, 6 month and 1 year), it will compute in 7 tide harmonic constanta to compare tidedata processing quality. It will compare using amplitude and phase standard deviation which is show thetide data processing quality. This analysis have function to prove that the range of data observation timehave a significant influence in a tide data processing. Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1921 TEKNIK; Volume 29, Nomor 1, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/43301 2022-09-19T00:37:33Z teknik:ART

"220728 2022 eng " 2460-9919 0852-1697 dc Tanoto, Yopi Yusuf "Program Studi Teknik Mesin, Universitas Kristen Petra, Jl. Siwalankerto 121-131, Surabaya, Indonesia, 60236". https://orcid.org/0000-0001-6422-6760 Filbert, Vincensius Febrian, Ronaldo Adriel, Nicholas Teknologi 3D printing atau yang umum disebut sebagai additive manufacturing merupakan salah satu metode rapid prototyping yang saat ini semakin luas digunakan. Acrylonitrile butadiene styrene (ABS) merupakan salah satu jenis material yang penggunaannya cukup masif dalam teknologi 3D printing. Penelitian ini menggunakan metode desain eksperimen orthogonal arrays L9 ( ). Adapun parameter proses yang digunakan adalah temperature nozzle, temperature base plate/bed dan orientasi, serta dengan tiga variasi level pada setiap parameter proses (230oC, 240oC, 250oC, 90oC, 100oC, 110oC, 0o, 45o, 90o). Penelitian ini bertujuan untuk mencari parameter proses yang paling optimal terhadap hasil respon waktu pengerjaan, sifat mekanik kekuatan lentur, dan akurasi dimensi. Parameter tersebut digunakan untuk kombinasi metode Taguchi dan PCR-TOPSIS dalam menyelesaikan persoalan multirespon. Berdasarkan hasil analisis ANOVA, parameter dengan level yang menghasilkan respon gabungan paling optimal adalah terletak pada spesimen kondisi ke-3, yaitu dengan nilai temperature nozzle sebesar 230°C; temperature base plate/bed sebesar 110°C; dan arah orientasi printing sebesar 90°. Hasil analisis dari PCR-Topsis terhadap 3 parameter proses menunjukkan bahwa parameter yang memiliki pengaruh yang paling tinggi secara berurutan adalah orientasi 33%, temperature base plate/bed 28% dan temperature nozzle 18%. Diponegoro University 2022-07-04 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/43301 TEKNIK; Vol. 43, No. 2 (2022): August 2022 ind Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/25119 2020-04-17T09:40:09Z teknik:ART

"191231 2019 eng " 2460-9919 0852-1697 dc Setiono, Fajar Rofii, Faqih Setiawidayat, Sabar Continous Passive Motion (CPM) adalah gerakan pasif yang terus menerus berfungsi melatih kinerja lengan dan kaki untuk pemulihan kekakuan gerakan yang diterapkan setelah operasi dan sakit strok. Electromyogram merupakan alat yang digunakan untuk merekam dan menganalisis sinyal myoelectric pada aktifitas otot lengan. Peralatan kesehatan dalam bidang fisiotherapy telah mengalami berbagai perkembangan untuk pemulihan pasien patah tulang yang membutuhkan alat bantu perangkat (CPM) . Perangkat CPM yang ada masih menggunakan sistem analog dan tidak ada sistem monitoring kondisi pasien, maka di perlukan peralatan yang dapat digunakan secara otomatis untuk mengendalikan mekanik dengan memakai motor dc. Rotary Encoder dan rangkaian Pulse Wave Modulation dan memonitoring pasien secara kontinu. Pada skripsi kali ini perangakat Continuous Passive Motion (CPM) lengan Dengan Control Electromyograph (EMG) di gabungkan untuk menyatukan kedua fungsi masing – masing alat sehingga alat ini dapat mengoptimalkan proses penyembuhan terhadap pasien. Hasil dari penelitian ini menunjukan identifikasi pembacaan sensor sinyal EMG. Diponegoro University 2019-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/25119 TEKNIK; Vol 40, No. 3 (2019): Desember 2019 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1969 2012-02-24T11:16:25Z teknik:ART

2460-9919 0852-1697 dc MODEL SISTEM PENUNJANG KEPUTUSAN (DECISION SUPPORT SYSTEM MODEL) UNTUK PERENCANAAN PENGELOLAAN WILAYAH SUNGAI SESUAI UU 7/2004 Darsono, Suseno S.A., Pranoto Array Total population increase therefore water supply requirement, irrigation water, as well as requirement ofresidential areas are also increase. Many ways in development of water resources management arerequired to fulfill future water requirement, and need minimizing land use changes. Integrated waterresources management planning based on river basins is required. Polices for water resourcesconservation program, exploitation of water resources and control of the water’s destructive force arerequired for optimizing water resources management. A holistic water resources management is requiredfor protecting, maintaining as well as increasing the value of water resources. According to WaterResources Law No. 7 year 2004, a water resources planning for a river basin has to prepare withparticipation of some stakeholders. Many program alternatives of water resources management will beproduced from a water resources management planning process. Thus, the ranking analysis of alternativeprograms needs to be proceeded. Decision Support System (DSS) with weighting optimization model is atool for helping to determine the rank of water resources development programs. The DSS technique needscriteria as basic for prioritizing water resources development programs. Determination weight for eachcriterion and score for each alternative water resources development program are required. Applicationof this model is a priority analysis of water resources development program from JRATUNSELUNA riverbasin for administration district Jepara, Kudus and Demak Diponegoro University 2012-02-02 14:39:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1969 TEKNIK; Volume 29, Nomor 3, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/51908 2023-06-25T22:39:35Z teknik:ART

"230531 2023 eng " 2460-9919 0852-1697 dc Sasmito, Bandi Geodetic Engineering Departement - Faculty of Engineering, Diponegoro University, Semarang-Indonesia https://orcid.org/0000-0001-8637-6727 Setiadji, Bagus Hario Isnanto, Rizal Jalan adalah kebutuhan krusial dalam aktivitas masyarakat. Jalan mempermudah akses transportasi dari tempat asal ke tujuan. Jalan juga penting sebagai infrastruktur transportasi darat untuk manusia dan barang. Namun, kondisi jalan yang tidak layak dapat menyebabkan kecelakaan. Pelacakan kondisi jalan sulit karena banyaknya jalan yang harus diperiksa. Penelitian ini menggunakan prinsip penginderaan jauh dengan teknologi Jaringan Syaraf Tiruan Deep Learning. YOLO (You Only Look Once) digunakan untuk deteksi kerusakan jalan. Hasil pendeteksian ditambahkan posisi atau lokasi dengan menggunakan Global Navigation Satellite System (GNSS), sehingga nantinya hasil deteksi dapat memberikan posisi atau lokasi yang akurat. Penelitian ini menghasilkan model identifikasi kerusakan jalan dengan nilai overall accuracy sebesar 88% dan nilai kappa accuracy sebesar 86% dan lokasi sebaran kerusakan yang memiliki koordinat posisi dengan akurasi RMSE sebesar ± 5,6 meter Diponegoro University 2023-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/51908 TEKNIK; Vol. 44, No. 1 (2023): May 2023 ind Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/9189 2020-04-17T09:31:03Z teknik:ART

"160731 2016 eng " 2460-9919 0852-1697 dc Hubungan Partisipasi dan Kepuasan Masyarakat dalam Program Revitalisasi Kawasan Braga Kota Bandung Dewi, Diah Intan Kusumo Jurusan Teknik Perencanaan Wilayah dan Kota, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Rakhmania, Siti Dea Jurusan Teknik Perencanaan Wilayah dan Kota, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Revitalisasi; partisipasi masyarakat; kepuasan masyarakat Braga; Revitalization; community participation; community satisfaction Revitalisasi Kawasan Braga sudah dilakukan selama hampir 20 tahun. Namun, masyarakat belum merasa puas dengan revitalisasi yang ada, karena seolah-olah tidak di pertimbangkan dengan matang dan kurang dilibatkannya masyarakat dalam program tersebut. Masyarakat menjadi kurang aktif dalam kegiatan revitalisasi Jalan Braga. Padahal masyarakat yang merasakan dampak dari adanya revitalisasi tersebut. Penelitian ini bertujuan untuk mengetahui hubungan antara tingkat partisipasi dengan kepuasan masyarakat terhadap program revitalisasi. Metode analisis yang digunakan adalah metode analisis kuantitatif dengan teknik analisis deskriptif kuantitatif, skoring dan crosstab. Jumlah Sampel yang digunakan sebanyak 80 sampel. Hasil penelitian ditemukan bahwa tingkat partisipasi masyarakat masih tergolong rendah dengan total skor 1367. Apabila dikaitkan dengan tangga partisipasi Arnstein (1986) partisipasi masyarakat ada pada tahap “Informing”. Sedangkan kepuasan masyarakat tergolong cukup puas dengan skor1717. Berdasarkan hasil penelitian dengan analisis crosstab diketahui hasil chi square test 2(3, N = 80) = 38.285; p < 0,05 atau taraf signifikansinya 0,000 < 0,05 sehingga Ho ditolak dan H1diterima. Hal ini menyatakan ada hubungan antara partisipasi dengan kepuasan masyarakat. Sedangkan berdasarkan hasil uji kolerasi maka diketahui r(80) = 0.637; p>0.01 dan r(80) = 0.682; p>0.01 yang artinya hubungan antar variable tergolong kuat. Berdasarkan koefisien kolerasinya maka diketahui bahwa hubungan antar variabel memiliki hubungan yang positif. [Correlation between Community Participation and Community Satisfaction in Revitalization Program at Braga Street, Bandung] Braga revitalization has already been done for almost 20 years. Nevertheless, people there still feel dissatisfied because it is not carefully considered as though and lack of participation in revitalization program. Whereas, people around are those who affected by revitalization program. This research aims to learn about correlation between participation level and satisfaction level towards the program. The analysis method used in this research is quantitative analysis by quantitative descriptive, scoring, and crosstab technique. Number of samples used in this research are 80 samples. Meanwhile, the result found is that level of community participation considered in a low level with score 1367. When associated with Arnstein’s participation ladders, the level of community participation is on informing stage. Whilst, the research’s result about level of community satisfaction is considered in a quite satisfied level with score 1717. Based on the crosstab analysis, known that the result of chi-square test 2(3,N= 80)=38.285;p<0.05 or significance degree is 0.000<0.05 so Ho rejected and H1 accepted. It is stated that there is a correlation between participation and community satisfaction. While, based on correlation test, known that r(80)=0.637;p>0.01 and r(80)=0.682;p>0.01 which means the correlation considered in a strong level and correlation coefficient has a positive relation. Diponegoro University 2016-07-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/9189 TEKNIK; Vol 37, No 1 (2016): (Juli 2016) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1738 2012-02-10T06:29:29Z teknik:ART

2460-9919 0852-1697 dc BAHAYA TEKUK PONDASI TIANG LANGSING DALAM TANAH LUNAK KOHESIF Dwi Atmanto, Indrastono slender piles, buckling, soft soils, cohesive This paper treats the buckling of slender piles completely embedded in soft cohesive soils. Usually these soilswere assumed to behave elastically and were theoretically replaced by horizontal springs supporting the piles.However, soft soils deform as plastic materials. Therefore, it is suggested to assume a lateral supportindependent of the amount of the lateral displacement and accordingly to calculate a model; hereby the safetyagainst buckling of the piles is computed. It is shown that an ideally straight, centrally loaded pile does notbuckle until the stresses in the pile material exceed the elastic range. The shape of the pile axis, however, is mostimportant. Only a very little deviation from a straight line, because the pile is bent elastically or stressles, causesa rapid decrease of the maximum pile-load in dependency of the shear resistance of the soils with the increase ofthe deviation. The proposed model is also applied for eccentrically piles, i.e. a vertical load as well as a bendingmoment act on the pile top Diponegoro University 2012-02-02 14:47:46 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1738 TEKNIK; Volume 32, Nomor 3, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/33156 2020-09-29T02:13:45Z teknik:EI

"200831 2020 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi front-matter jurnal Teknik Volume 41 Nomor 2 Tahun 2020, yaitu meliputi halaman sampul, fokus dan ruang lingkup Teknik, informasi indeksasi, susunan tim penyunting dan mitra bebestari, kata pengantar editor dan daftar isi  Artikel editorial ini berisi front-matter jurnal Teknik Volume 41 Nomor 1 Tahun 2020, yaitu meliputi halaman sampul, fokus dan ruang lingkup Teknik, informasi indeksasi, susunan tim penyunting dan mitra bebestari, kata pengantar editor dan daftar isi Diponegoro University 2020-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/33156 TEKNIK; Vol 41, No. 2 (2020): August 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2748 2012-03-28T04:47:14Z teknik:ART

2460-9919 0852-1697 dc TEKNIK PEMINJAMAN KANAL DENGAN METODE BDCL ((BORROWING WITH DIRECTIONAL CHANNEL-LOCKING) PADA SISTEM KOMUNIKASI SELULER Ajulian Zahra M, Ajub administrasi Array The cellular mobile mobile telephone system has found important applications in metropolitant areas. Its different types of channel assignment schemes has been adopted in many cellular systems.  To satisfy the high demand of mobile telephone service channel needs to be reused in different noninterfering cells. In the fixed assignment strategy, a set of nominal channels is permanently assigned to each cells, and the same set of channels is reused some distance away. That distance is called the cochannel reuse distance. Using the fixed channel assignment strategy, an arriving call can only be served by the nominally assigned channels. If all nominal channels are assigned, new calls are blocked.    Borrowing channel assignment (BCA) is the simplest   allocation scheme. In borrowing channel assignment, channel assignment is initially fixed that is a channel set is preassigned to each cell. If there are  incoming calls to a cell whose channels are all occupied, the cell borrows channels  from its neighboring cells under the constraint of no interference. When  a channel is borrowed, several other cells are not allowed to use that channel. In this final project two channel assignment  strategies are proposed. They are the borrowing with directional channel-locking and  the fixed channel  assignment. BDCL performance is compared with fixed channel assignment (FCA). In this borrowing with directional channel-locking (BDCL), when a channel is borrowed, the locking of this channel in the cochannel is restricted only those affected by this borrowing..      In this final project the simulated  cellular systems contains 49 hexagonal cells all cells with eight nominal channel. The simulation shows that with the newly proposed BDCL strategy can give a lower lower blocking probability than FCA under nonuniform traffic distribution. Diponegoro University 2012-02-10 00:00:00 application/msword https://ejournal.undip.ac.id/index.php/teknik/article/view/2748 TEKNIK; Volume 28, Nomor 3, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/60335 2025-04-24T18:11:04Z teknik:ART

"240613 2024 eng " 2460-9919 0852-1697 dc Nugroho, Adi Prasetya Department of Civil Engineering, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus UNDIP Tembalang, Semarang, Jawa Tengah, Indonesia 50275 Sachro, Sri Sangkawati Pengelolaan Bendungan Way Apu memerlukan ketersediaan data curah hujan yang akurat dan memiliki rentang periode yang panjang. Untuk menangani berbagai permasalahan keterbatasan data dan lokasi pos hujan observasi yang terletak di luar DTA Bendungan Way Apu dapat menggunakan data hujan satelit GPM-IMERG. Studi ini bertujuan untuk mengevaluasi dan menentukan faktor koreksi data hujan satelit GPM-IMERG dibandingkan dengan data pos hujan observasi untuk melihat kelayakannya. Koreksi data hujan satelit menggunakan metode regresi untuk kemudian dilakukan validasi dengan Uji Kesalahan Relatif (KR), Nash-Sutcliffe Efficiency (NSE), Koefisien Korelasi (R) dan Root Mean Squared Error (RMSE). Hasil studi menunjukkan perbandingan data hujan GPM-IMERG dengan data hujan observasi pada data hujan bulanan cenderung konsisten terhadap data 3 (tiga) pos curah hujan di DAS Way Apu yaitu Stasiun Meteorologi Namlea, PCH Savana Jaya dan PCH Wae Tina dengan koefisien korelasi sebesar 0,63- 0,72 (interpretasi korelasi kuat). Dari validasi 3 (tiga) rentang data hujan berbeda, skenario validasi periode 3 (tiga) tahun pada PCH Wae Tina memiliki hasil yang paling baik dalam kondisi sebelum maupun sesudah dikoreksi dengan faktor koreksi paling baik yaitu menggunakan persamaan regresi linier intercept y = 1,0620x dan koefisien determinasi (R2) sebesar 0,8660. Diponegoro University 2024-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/60335 TEKNIK; Vol. 45, No. 1 (2024): May 2024 ind Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/15556 2017-11-24T08:45:51Z teknik:EI

"170701 2017 eng " 2460-9919 0852-1697 dc Front-matter Jurnal Teknik, Ketua Editor Departemen Teknik Elektro Universitas Diponegoro teknik; jurnal teknik Artikel editorial ini berisi front-matter jurnal Teknik Volume 38 Nomor 1 Tahun 2017, yaitu meliputi halaman sampul, fokus dan ruang lingkup Teknik, informasi indeksasi, susunan tim penyunting dan mitra bebestari, kata pengantar editor dan daftar isi. Diponegoro University 2017-07-01 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/15556 TEKNIK; Vol 38, No 1 (2017): (Juli 2017) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1816 2012-02-15T03:18:19Z teknik:ART

2460-9919 0852-1697 dc PEMISAHAN LARUTAN MENJADI FRAKSI-FRAKSINYA MENGGUNAKAN KHROMATOGRAFI ANNULAR KONTINYU S Retnowati, Diah Annular, Chromatography, continuous, separation Chromatography can be used for analysis or separation. This review describes continuous annularchromatography for separation of enantiomers or isomers. These type molecules are hardly separatedwith conventional separation, and therefore need a good separation method. Continuous AnnularChromatography consists of a rotating annular bed. The annulus is formed between two concentriccylinders, and the resin is packed in the annulus. At fix position at the top of the bed, four solutions arecontinuously fed, the feed mixture to be separated, a displacer solution, a regenerant and a rinse. TheAnnulus is slowly rotated with the result that different zones will formed helices of characteristic anglewhich can be collected at variations fixed points around the bottom of the bed. Diponegoro University 2012-02-02 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1816 TEKNIK; Volume 30, Nomor 1, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/37019 2021-08-29T17:46:58Z teknik:ART

"210826 2021 eng " 2460-9919 0852-1697 dc Vehicle Counting Accuracy Improvement By Identity Sequences Detection Based on Yolov4 Deep Neural Networks Rofii, Faqih Teknik Elektro, Fakultas Teknik, Universitas Widyagama Malang https://orcid.org/0000-0003-2720-3951 Priyandoko, Gigih Teknik Elektro, Fakultas Teknik, Universitas Widyagama Malang https://orcid.org/0000-0001-5498-6248 Fanani, Muhammad Ifan Teknik Elektro, Fakultas Teknik, Universitas Widyagama Malang Suraji, Aji Teknik Sipil, Fakultas Teknik, Universitas Widyagama Malang detection and classification; vehicles counting; Yolov4; deep neural networks; accuracy Model untuk deteksi, klasifikasi dan penghitungan jumlah kendaraan berbasis pada visi komputer dan kecerdasan buatan terus berkembang. Penelitian ini mempresentasikan pendekatan model deteksi, klasifikasi dan penghitungan jumlah kendaraan berbasis Yolov4. Penghitungan jumlah kendaraan dilakukan dengan membangkitkan nomor urut identitas tiap kendaraan setelah objek dideteksi dan diklasifikasi yang ditandai dengan ditampilkannya bounding box, kelas dan skor kepercayaan. Input sistem berupa dataset video yang diambil dengan mempertimbangkan posisi kamera, intensitas cahaya dan kepadatan trafik kendaraan. Metode yang dilakukan telah mampu menghitung jumlah kendaraan berupa mobil, sepeda motor, bus dan truk. Evaluasi kinerja model didasarkan pada parameter akurasi, presisi dan recall total dari confusion-matrix. Hasil pengujian dataset dan perhitungan paramater performa model telah didapat nilai akurasi, presisi dan recall total terbaik ketika pengujian model dilakukan pada siang hari dimana posisi kamera pada ketinggian 6 m dan susut 500 sebesar 83%, 93% dan 94%.  Sedangkan akurasi, presisi dan recall total terendah didapat ketika pengujian model dilakukan pada malam hari dimana posisi kamera pada ketinggian 1,5 m dan susut 900 sebesar 68%, 77% dan 78%. Diponegoro University 2021-08-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/37019 TEKNIK; Vol. 42, No. 2 (2021): August 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/5627 2017-07-19T17:16:44Z teknik:ART

"130913 2013 eng " 2460-9919 0852-1697 dc PERBANDINGAN EFEKTIFITAS HASIL PENGGELONTORAN SEDIMEN DI WADUK CARA FLUSHING DAN SLUICING Atmodjo, Pranoto S. Sangkawati, Sri Kirno, Kirno Array This study compares the effectiveness of the flushing of sediment in the reservoir by means of flushing and Sluicing way, based on Physical Hydraulic Test (Model Test) in the laboratory. Flushing is removing accumulated deposited sediment. While slucing is releasing of sediment through the reservoir before settled or keep sediment remain in suspension and its occur during flood period. Sediments Flush Effectiveness represented by the percentage of released sediment by sediment deposited or the amount of sediment entering the reservoir during the flushing period.The model based on the prototipe from Detail Design of Structural Countermeasures for Sedimentation on Wonogiri Reservoir by Nippon Koei 2009. Running model duration is one hour, used free flow and submergence condition, with discharge variation Q=100, 200 and 400 m3/s. Sluicing experiments conducted with some 60 liters of sediment sprinkle evenly wide flow, and Flushing implemented by 2,00 m thickness of deposited sediment that spreaded over the reservoir bottom before running. From this research showed that Sluicing way more efficient than the flushing way, where the number of efficiency of sediment Sluicing way bigger than the efficiency of flusing way, in the running an hour in the laboratory test Diponegoro University 2013-10-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/5627 TEKNIK; Volume 34, Nomor 2, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67919 2025-07-07T19:30:43Z teknik:ART

"250331 2025 eng " 2460-9919 0852-1697 dc Pambudi, Tri Department of Civil Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275|Universitas Diponegoro Nugroho, Hari Suripin, Suripin The Sutami Dam is located on the Brantas River, precisely in Karangkates Village, Sumberpucung District, Malang Regency. The Sutami Dam has been in operation for fifty-one years. Based on observations in the field, the rate of sedimentation entering the Sutami Reservoir is quite high, resulting in shallowing in the reservoir storage area up to the intake gate, which can affect the performance and productive life of the reservoir. This research is conducted to evaluate the planning of mapping dredging locations, the potential sediment that can be dredged, and the increase in the volume capacity of the dredging equipment. This research uses data from bathymetry, which is then analyzed for sedimentation and scour values compared between 2019 and 2022. For soil parameter data, laboratory test results such as grain size analysis and hydrometer analysis are utilized. Data analysis using the cut-fill method in ArcMap 10.8.2 software. The results of this research show that in carrying out dredging activities in the reservoir area, it is necessary to divide the dredging location into two zones with two types of dredgers that have different specifications. To increase the dredging volume capacity in the Sutami Reservoir using the scenario of using two existing dredgers and the addition of two new dredgers, an increase in the dredging capacity in the Sutami Reservoir of 1,702,189.00 m³ per year was obtained. Diponegoro University 2025-03-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67919 TEKNIK; Vol 46, No 2 (2025) April 2025 ind Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/20052 2020-04-17T09:37:40Z teknik:ART

"181231 2018 eng " 2460-9919 0852-1697 dc Time-Series InSAR Analysis of the Small Baseline Subset to Estimate Surface Deformation at Mt. Bromo Indonesia Arbad, Arliandy Pratama Department of Geomatics Engineering, Sumatera Institute of Technology Takeuchi, Wataru Industrial Institute of Science, The University of Tokyo Aoki, Yosuke Earthquake Research Institute, The University of Tokyo Ardy, Achmad Department of Agriculture Technology, Lampung University Jamilah, Mutiara Department of Geodesy Engineering, Diponegoro University SBAS, Surface Deformation, Volcano Eruption, ALOS/PALSAR We observe the surface deformation of the Mt. Bromo which located at eastern Java Indonesia area that includes neighborhood volcanic system on TNBTS (Taman Nasional Bukit Tengger Semeru). Recently, remote sensing has played as an important role to observe volcano behaviour. We apply the SAR Interferometry (InSAR) algorithm referred to as Small Baseline Subset (SBAS) approach that allows us to generate mean deformation velocity maps and displacement time series for the studied area. The common SBAS technique, the set of interferometric phase observations writes as a linear combination of individual SAR scene phase values for each pixel independently. Particularly, the proposed analysis is based on 22 SAR data acquired by the ALOS/PALSAR sensors during the 2007–2011 time interval. A fewer studies have been able to show capability of InSAR analysis for investigating cycle of volcano especially of Mt. Bromo which characterized eruption stratovolcano in ranging one to five years. The results expected in this work represent an advancement of previous InSAR studies of the area that are mostly focused on the deformation affecting the caldera. According to the result, we expected this study could implement on risk management or infrastructure management. Diponegoro University 2018-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/20052 TEKNIK; Vol 39, No. 2 (2018): Desember 2018 eng Copyright (c) 2019 Teknik

oai:ojs.ejournal.undip.ac.id:article/1898 2012-02-24T11:23:19Z teknik:ART

2460-9919 0852-1697 dc THE PERFORMANCE OF REVERSE OSMOSIS MEMBRANE IN WATER TREATMENT Budiyono, Budiyono Buchori, Luqman Membrane Reverse Osmosis, TDS, flux Membrane technology has led to a new focus on water and wastewater treatment. This is due to severaldrawback of the conventional water treatment i.e release the toxic and carcinogenic materials. In thisresearch, the use Reverse Osmosis (RO) membrane for treating river and well water to obtain clean anddrinking water was studied. The variables studied were effect of pressure and operation time to themembrane flux. The pressure was varied from 1 to 7 bar and the operation time was varied from 15 to 60minutes. The content of Total Dissolved Solid (TDS) in the permeate product was analyzed. The resultsshown that the increase of pressure would increase the membrane flux and decrease TDS. The increaseof the operation time would decrease membrane flux and TDS. The reverse osmosis membrane wassuccessfully applied to treat the river and well water. The product fulfill national standard quality ofdrinking water by viewpoint of the TDS content Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1898 TEKNIK; Volume 29, Nomor 1, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/44234 2025-07-07T19:35:10Z teknik:ART

"220531 2022 eng " 2460-9919 0852-1697 dc Spatial Analysis of Urban Settlement Development in Kudus District with Cellular automata marcov Model (Case Study: Kota District, Bae District, Jati District and Kaliwungu District) Amarrohman, Fauzi Janu Departemen Teknik Geodesi, Universitas Diponegoro Wahyuddin, Yasser Departemen Teknik Geodesi, Universitas Diponegoro Novialis, Elly Indah Departemen Teknik Geodesi, Universitas Diponegoro landuse; modeling; settlement; RTRW; GIS Peningkatan kebutuhan lahan permukiman akan mendorong terjadinya perubahan fungsi penggunaan lahan. Monitoring perkembangan permukiman perkotaan di Kabupaten Kudus, tepatnya di Kecamatan Bae, Jati, Kaliwungu dan Kota perlu dilakukan agar tidak menimbulkan pengalihan fungsi penggunaan lahan yang melenceng dari rencana tata ruang wilayah (RTRW) yang berlaku. Monitoring tersebut dapat dilakukan dengan pemodelan. Pemodelan perkembangan permukiman perkotaan selanjutnya dikombinasikan dengan sistem informasi geografi (SIG) untuk mendukung analisis spasialnya. Penelitian ini bertujuan untuk mengetahui perubahan fungsi penggunaan lahan permukiman perkotaan tahun 2010-2020 dengan metode overlay identity, mengaplikasikan metode CA-Marcov dalam memprediksi penggunaan lahan permukiman perkotaan tahun 2030 dan mencari nilai kesesuaian pemodelan dengan peta RTRW serta pola perkembanganya menggunakan average nearest neighbor. Data yang digunakan berupa citra WordView tahun 2010 dan 2015, citra SPOT-7 tahun 2020 dan Peta RTRW Kabupaten Kudus tahun 2012-2032. Hasil penelitian menunjukan perkembangan permukiman perkotaan pada tahun 2010-2015 sebesar 162,375 Ha, sedangkan pada tahun 2015-2020 sebesar 55,978 Ha. Selama tahun 2010 hingga 2020 pada kawasan pertanian tanaman pangan beralih fungsi menjadi permukiman perkotaan sebesar 126,927 Ha. Luas lahan permukiman perkotaan hasil prediksi penggunaan lahan tahun 2030 sebesar 3323,285 Ha, dimana kawasan pertanian tanaman pangan menjadi lahan terbesar yang dialih fungsikan menjadi permukiman perkotaan sebesar 321,803 Ha. Nilai kesesuaian hasil prediksi penggunaan tahun 2030 dengan peta RTRW sebesar 71,42%. Pola perkembangan permukiman perkotaan tahun 2030 bersifat acak. Diponegoro University 2022-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/44234 TEKNIK; Vol. 43, No. 1 (2022): May 2022 ind Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/7678 2014-12-24T01:37:52Z teknik:EI

"141020 2014 eng " 2460-9919 0852-1697 dc Front-matter Istadi, Istadi Diponegoro University 2014-10-20 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/7678 TEKNIK; Vol 35, No 1 (2014): (July 2014) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1943 2012-02-24T11:16:25Z teknik:ART

2460-9919 0852-1697 dc PENGEMBANGAN PROSES BELAJAR MENGAJAR MELALUI SIMULASI DAN MODUL AJAR INTERAKTIF DALAM CD ROM PADA MATA KULIAH ASPEK HUKUM PEMBANGUNAN Wibowo, M. Agung Participate Actively, Simulation, Construction Law, Procuremen Learning Process Needs Improvement On The Way To Deliver The Subjects To The Students. This IsBecause The Aspect Surounding The Subjects Or The Material Are Keep Changing Inherent With TheDynamic Social And Economic Change Of The Society.There Are Many Types Of How To Deliver The Subjects To The Students. It Can Start From SeminarThrough Discussion. Among All Of Types, Simulation Is One Of The Types Where The Students CouldParticipate Actively To Act As Person On The Real Industry.The Simulation Method Is Chosen To Deliver A Subjet Of Construction Law Including A ProcurementProcess To The Students. On The Procurement Method Especially For Government Goods And Services,There Are Many Aspects That The Student Should Know. However, Many Terms Are Not Easily FiguredOut On Some Occasion During Tender And Bidding Phase. By Doing Simulation, The Student Could ActAs Person Who Incharge On Tender And Bidding Process Whether As The Committee Or As TheContractor, Consultant And Supplier.A Modul Was Developed As Well As A Student’s Guidance. This Modul Was Based On Some EmpiricalInvestigation And Previous Literature Review On The Construction Law Especially On The ProcurementMethod. Diponegoro University 2012-02-02 14:39:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1943 TEKNIK; Volume 29, Nomor 3, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/48653 2023-01-24T23:37:53Z teknik:ART

"221229 2022 eng " 2460-9919 0852-1697 dc Analysis of Ankle Foot Design for Transtibial Prosthesis Components using the Finite Element Method Lestari, Wahyu Dwi Department of Mechanical Engineering, Faculty of Engineering, University of Pembangunan Nasional "Veteran" Jawa Timur https://orcid.org/0000-0002-5863-4968 Adyono, Ndaru Department of Mechanical Engineering, Faculty of Engineering, University of Pembangunan Nasional Veteran Jawa Timur Ankle Foot; Transtibial Prosthesis; AISI 304; Midstance; FEM Finite element method (FEM) has been identified as a tool that can be used to analyze stress and strain behavior occurring in prosthetic components of the lower extremities. The main objective of this study was to analyze the structure of the alternative ankle foot designed for the transtibial prosthesis component. The ankle foot is designed and simulated for strength using Solidworks software. There are two alternative designs of the ankle foot that are designed. The material used is AISI 304 with Young's Modulus 193000 MPa and Poisson's Ratio 0.29. Based on the design results, the lowest weight is owned by alternative design 1 of 491.69 grams. The simulation was carried out under normal running conditions in the midstance phase. The applied load is 1000N. There are three data obtained from the simulation results in the form of von Mises stress, deformation, and strain energy. Based on the simulation results on alternative ankle foot design 2, the value of von Misses stress is lower. Even so, the two alternative designs that have been designed are still within safe limits because they still meet the predetermined safety factor value.   Diponegoro University 2022-12-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/48653 TEKNIK; Vol. 43, No. 3 (2022): December 2022 eng Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/7023 2016-01-07T03:54:03Z teknik:ART

"151210 2015 eng " 2460-9919 0852-1697 dc KONSEP WATERFRONT PADA PERMUKIMAN ETNIS KALI SEMARANG Sarinastiti, Ajeng Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang Rukayah, R. Siti Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang Murtini, Titin Woro Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang Array Kali Semarang sebagai sungai bersejarah di Semarang, dahulu memiliki fungsi transportasi yang membelah perekonomian dan pertahanan kota. Bermacam etnis pedagang tinggal di sekitarnya hingga daerah tersebut menjadi permukiman etnis. Contohnya Kampung Melayu, etnis Tionghoa pada Kampung Pecinan, etnis Arab pada Kampung Kauman, serta Kampung Sekayu. Dan juga Kawasan Kota Lama sebagai daerah bersejarah dalam masa pemerintahan Kota Semarang. Kali Semarang memberi pengaruh fungsi waterfront pada permukiman tersebut.Penelitian ini bertujuan untuk mengetahui konsep waterfront pada permukiman etnis Kali Semarang, yaitu Kampung Melayu, Kawasan Kota Lama, Kampung Pecinan, Kampung Kauman, dan Kampung Melayu. Diperlukan eksplorasi dan deskripsi keadaan yang mendalam untuk mengidentifikasikan informasi baru pada lokasi penelitian dengan konsep atau teori yang menjelaskan fenomena yang akan terjadi. Metode kualitatif rasionalistik digunakan dengan landasan teori mengenai waterfront dan permukiman etnis disertai dengan pengumpulan data melalui studi literatur dari berbagai sumber, observasi lapangan langsung, dan pertanyaan mendalam kepada key person. Hasil penelitian ini menunjukkan bahwa hanya Kampung Melayu dan Kawasan Kota Lama yang pada awal mulanya menggunakan konsep waterfront karena lokasinya merupakan kawasan pelabuhan, pergudangan, dan perdagangan. Kampung Pecinan sebagai kawasan perdagangan, serta Kampung Kauman dan Kampung Sekayu sebagai permukiman tidak menggunakan konsep waterfront. [Title: Waterfront Concept on Ethnic Settlement in Kali Semarang] Kali Semarang, as a historical river in Semarang, has function as transportation to support the economy and city. Many ethnic traders settled around, so that area becomes ethnic settlement, such as Kampung Melayu, Chinese ethnic in Kampung Pecinan, Arabian ethnic in Kampung Kauman, and Kampung Sekayu, and Kota Lama areas as historical area in Semarang’s government era. The Kali Semarang giving influence of the waterfront function of those area. This paper purposes to understand waterfront concept of ethnicity settlement around Kali Semarang, such as: Kampung Melayu, Kawasan Kota Lama, Kampung Pecinan, Kampung Kauman, and Kampung Melayu. Exploration and deeper situations description are needed to identify new informations in respected location completed with concept or theories that explain the phenomenon. The qualitative rationalistic method is used for explaining theoritical basis regarding waterfront and ethnical settelement by data collecting through literature study, field observation, and key person question. The result of this research shows that Kampung Melayu and Kota Lama are pioneer to use the waterfront concept because of it location constitute as sea port area, warehouse, and commerce. Kampung Pecinan as a commerce area, Kampung Kauman and Kampung Sekayu, as settlement, did not use the waterfront concept. Diponegoro University 2015-12-09 12:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/7023 TEKNIK; Vol 36, No 2 (2015): (December 2015) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1729 2012-02-10T06:41:42Z teknik:ART

2460-9919 0852-1697 dc STUDI KERUSAKAN LINGKUNGAN AKIBAT PENAMBANGAN BGGC WILAYAH SUNGAI DI KABUPATEN PEKALONGAN Najib, Najib Mining, sand and gravel deposits, devastated land Pekalongan Residence has a relatively many sand and gravel deposits particularly in river area. Nowadays,many locations have been exploited by local residences or investors from other regions. Sand and gravel miningis being done since 1980s, that’s why it can created devastated land in that surrounding area of mining. As theresult of that condition, it is called for the research to determine how devastated land condition during or aftermining. Factors used in this research to determine devastating land are mining technique, rate of mining, depthof slope mining, width of mining hole, relief of digging base, characteristics of material slope, tilt of diggingslope, reserving of top soil and overburden, erosion stage, vegetation cover, reclamation. Devastated landbased on mining has vary in low and high scale. In the gullies river,most of them in low devastated landcondition. Meanwhile, devastated land in border of river vary in low up to high. Several places which are havehigh devastated land are Sastrodirjan (Wonopringgo District), Dororejo(Doro District) and Krompeng (TalunDistrict). In deposit bar, has low up to high devastated land. High devastated land are Pododadi (Karanganyardistrict), Sastrodirjan (Wonopringgo district) and Kaligawe (Karangdadap district). Diponegoro University 2012-02-02 14:48:56 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1729 TEKNIK; Volume 32, Nomor 2, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/23587 2020-10-05T05:14:03Z teknik:ART

"200831 2020 eng " 2460-9919 0852-1697 dc Simulasi Lapangan Penerapan Chicane Sebagai Perangkat Traffic Calming di Indonesia Ersamaulia, Masayu Silvi Program Studi Manajemen Keselamatan Transportasi Jalan, Politeknik Keselamatan Transportasi Jalan Kusumastutie, Naomi Srie Program Studi Manajemen Keselamatan Transportasi Jalan, Politeknik Keselamatan Transportasi Jalan Rusmandani, Pipit Program Studi Manajemen Keselamatan Transportasi Jalan, Politeknik Keselamatan Transportasi Jalan traffic calming; chicane; simulasi lapangan; reduksi kecepatan; kapasitas jalan Traffic calming merupakan salah satu cara yang dapat digunakan untuk mengelola kecepatan. Salah satu jenis traffic calming yang terbukti efektif mereduksi kecepatan dan mengurangi volume lalu lintas adalah chicane. Namun sayangnya chicane tidak popular digunakan di Indonesia. Untuk itu penelitian ini bermaksud untuk menguji efektivitas chicane dalam mereduksi kecepatan kendaraan agar dapat menjadi alternatif traffic calming di Indonesia. Metode yang digunakan dalam penelitian ini adalah simulasi lapangan dengan menggunakan taffic cone dan rambu portable dalam mengimplementasikan chicane. Model chicane yang digunakan adalah model chicane dari Pedoman Perencanaan Fasilitas Pengendali Kecepatan Lalu Lintas (model 1) dan Pennsylvania’s Traffic Calming Handbook (model 2). Lokasi studi merupakan jalan lokal yang menjadi blacksite, yaitu Jalan Pemuda Kabupaten Kebumen, Jawa Tengah, Indonesia. Hasil penelitian  menunjukkan bahwa kedua model chicane efektif dalam mereduksi kecepatan. Chicane model 1 mampu mereduksi kecepatan pada masing-masing arah sebesar 20% dan 17%, sedangkan pada model 2 sebesar 38,2% dan 39,6%. Namun demikian, kapasitas jalan pada saat implementasi chicane model 2 mengalami penurunan yang sangat drastis, dari kapasitas jalan sebesar 1.516,54 smp/jam pada kondisi eksisting menjadi sebesar 1.527 smp/jam. Oleh karena itu, chicane model 1 lebih disarankan untuk diimplementasikan pada lokasi studi dengan kombinasi pita penggaduh sebelum memasuki chicane Diponegoro University 2020-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/23587 TEKNIK; Vol 41, No. 2 (2020): August 2020 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/23587/65708 https://ejournal.undip.ac.id/index.php/teknik/article/download/23587/65710 Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2128 2012-02-23T08:22:33Z teknik:ART

2460-9919 0852-1697 dc PENUKAR KALOR CANGKANG DAN TABUNG EFEKTIF UNTUK MENDINGINKAN MINYAK PELUMAS MESIN DIESEL DENGAN PENYARINGAN SISTEM CABANG Murni, Murni Lubrication, diesel engine Lubrication is important parameter in whole operation in diesel engine, bad lubrication will affect trouble inoperation lubrication have double function decrease friction and cooling. So lubrication has to be treatmentto increase quality by cooling method. Cooling method is done with bat exchanger of shell and tube type. . Diponegoro University 2012-02-10 11:25:01 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2128 TEKNIK; Volume 28, Nomor 2, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/56875 2024-01-16T21:44:16Z teknik:ART

"231208 2023 eng " 2460-9919 0852-1697 dc Sriyana, Sriyana UNIVERSITAS DIPONEGORO Winaktoe, Wied Wiwoho Tata kelola pembangunan yang lemah terindikasi menjadi penyebab ancaman bencana kelangkaan air di Indonesia pada tahun 2045. Tata kelola tersebut khususnya terkait keterpaduan pengelolaan Daerah Aliran Sungai (DAS).  Penelusuran terhadap praktik mutakhir komunitas Internasional menunjukkan bahwa multi-method modeling menjadi rekomendasi untuk diaplikasikan. Tujuan riset ini adalah menerapkan multi-method modeling yang didukung oleh eksaminasi hubungan kausal terhadap parameter pembentuk sub kriteria klasifikasi DAS dan merestrukturisasi hasil-hasil tersebut melalui DPSIR. Adapun lokasi kajian berada di Sub DAS Srep, Jawa Tengah dan dataset merupakan data-data yang diperoleh melalui dokumen kajian sub DAS Srep, Indeks Desa Membangun, dan survey pada periode 2015-2020.  Hasil riset menunjukkan bahwa (1) sub terdapat sub kriteria yang menjadi prasyarat atau penentu keberhasilan sub kriteria klasifikasi DAS lainnya; (2) informasi hubungan eksogenik yang diformulasi secara saintifik dapat membantu sektor-sektor mengetahui posisinya dan hubungannya terhadap sektor lainnya agar dapat bersinergi secara subtantif maupun ketepatan dalam jadwal pelaksanaan. Hal ini dapat memperjelas akar masalah, meningkatkan keterpaduan perencanaan dan mereduksi kelemahan kordinasi dan tumpang-tindih kegiatan; (3) analisis secara isolatif tidak sensitif terhadap dampak yang ditimbulkan pada parameter atau sub kriteria lain dalam DAS.   Diponegoro University 2023-12-08 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/56875 TEKNIK; Vol. 44, No. 3 (2023): December 2023 ind Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/12663 2020-04-17T09:33:33Z teknik:ART

"170701 2017 eng " 2460-9919 0852-1697 dc Analisa Metode Pengukuran Berat Badan Manusia Dengan Pengolahan Citra Fauzi, Hilman Telkom University Rahman, Fadlur Telkom University Azhar, Tauhid Nur Universitas Islam Bandung Ayudina, Nasya Telkom University Dwiatmaja, Ratri Telkom University body weight; body surface area; image processing Body weight is one of the most important parameters to determine the condition of a person's body. To find out information about the weight is generally done by using a measurement scales. However, there are several methods that can be done to determine a person's weight, one of which is by using image processing. Through this study, we tried to decipher the possibility of weight calculation using image processing with various mathematical approach based on a calculation of body surface area (BSA) and the volume of the ellipse for the human body. We process the image in the form of digital photos to generate information on the person's weight on the photo. Furthermore, we did investigate the possibility, calculation, and analysis of the accuracy of the system. To determine the performance of the system that we made, we did the comparison calculation results with body weight results of the scales. As a result, we conclude that the weight calculation method is feasible through image processing with various conditions and restrictions, it is confirmed by the results of the analysis and the accuracy of our calculation system is 95% at a distance of 470 cm between the camera and the object. Diponegoro University 2017-07-01 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/12663 TEKNIK; Vol 38, No 1 (2017): (Juli 2017) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1766 2012-02-10T07:57:25Z teknik:ART

2460-9919 0852-1697 dc DESAIN LOADING DOCK DAN PENENTUAN LEVEL STOCK UNTUK MEREDUKSI JUMLAH ANTRIAN DAN PERSEDIAAN PADA AREA PENERIMAAN BARANG (Studi Kasus : Perusahaan Otomotif Internasional)) Santosa, Haryo Hartini, Sri Karima R, Meilisa Cycle Issue, Level Stock, Loading Dock, Stock maksimum Loading docks must be located for easy access by service vehicles and should be separate from public entrancesto the building, public spaces, and other light industrial or warehouse zones. However, it is also important thatthey are designed to ensure the safety and security of their users and the users of other nearby spaces. Thisresearch would be tryied to design the schedule of arrival time and cycle issue in the part preparation. To reducemaximum inventory, this research have been determinated level stock. Its result that the number of queue canreduce from 5 to 2 in each line and maximum inventory can reduce 49% Diponegoro University 2012-02-02 14:46:02 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1766 TEKNIK; Volume 31, Nomor 2, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/38715 2021-06-03T02:07:12Z teknik:EI

"210510 2021 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Dep Artikel editorial ini berisi front-matter TEKNIK Volume 42 Nomor 1 Tahun 2021, yaitu meliputi halaman sampul, fokus dan ruang lingkup TEKNIK, informasi indeksasi, susunan tim penyunting dan mitra bebestari, kata pengantar editor dan daftar isi.  Diponegoro University 2021-05-03 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/38715 TEKNIK; Vol. 42, No. 1 (2021): May 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4812 2013-05-06T03:27:11Z teknik:ART

"130402 2013 eng " 2460-9919 0852-1697 dc EVALUASI EFISIENSI PANAS DAN EMISI GAS RUMAH KACA PADA ROTARY KILN PABRIK SEMEN Ridha Mutiara, Farisa Hadiyanto, Hadiyanto Array Kiln is an equipment which has vital existence in the manufacture of cement. Kiln firing requires a high temperature to produce a clinker. Higher combustion temperature allows heat transfer occurs on the surface coating on the walls of the kiln that is not evenly distributed, so most of the heat is absorbed. As a consequence, it requires large amounts of fuel. Heat efficiency in the kiln is important to know. Production of clinker in the kiln which occurs at high temperatures, will also release a variety of gases, such as CO2. Carbon dioxide is included as one of the greenhouse gas, this gas will negatively impact the earth's ozone. Therefore, need to know the range of greenhouse gas that is formed, in order to determine the appropriate mitigation and prevention. Evaluation result of heat efficiency in the kiln is 43,17% by generating greenhouse gas emissions amounted to 6,173 tonnes CO2 equivalent / tonne of coal. Diponegoro University 2012-08-08 13:06:31 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/4812 TEKNIK; Volume 34, Nomor 1, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/59296 2025-04-17T01:00:52Z teknik:ART

"241230 2024 eng " 2460-9919 0852-1697 dc Improving Solvolysis Rate Via Under Glass-Transition Temperatures Quenching Followed by Roll Bending of Carbon Fiber Reinforced Polymer Composite Sukanto, Heru Mechanical Engineering Department, Universitas Sebelas Maret Surakarta. Jl. Ir. Sutami 36A Kentingan Jebres Surakarta. Kusharjanta, Bambang Mechanical Engineering Department of Universitas Sebelas Maret Kaavessina, Mujtahid Chemical Engineering Department of Universitas Sebelas Maret solvolysis; glass transition temperature; quenching; surface area; delamination Reusing carbon fiber once it has been used as reinforcement in composite structures involves a complex recycling technique. This recycling process requires a strategy to ensure the recycled carbon fiber meets technical standards. Among various recycling processes, the solvolysis technique yields carbon fiber with high purity. However, solvolysis is also the most time-consuming method. This study proposes using quenching and roll-bending pretreatments, which increase the contact surface area between the composite and the solvent solution for expediting the solvolysis process of carbon fiber reinforced polymer (CFRP) composite. Quenching was performed by heating the composite to 75°C, 100°C, and 125°C before immersing it in water at room temperature. Roll bending was designed based on the principle of three-point bending and aimed to induce a strain in the composite that exceeds the strain of the epoxy resin. Quenching at 75°C, followed by roll bending, resulted in a 21% increase in the surface area of the composite. This increased area improved the solvolysis efficiency of CFRP composites by up to 21% after four days of immersion in a mixture of acetone and acetic acid. Diponegoro University 2024-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/59296 TEKNIK; Vol 45, No 3 (2024): December 2024 eng Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/17118 2020-04-17T09:36:30Z teknik:ART

"180731 2018 eng " 2460-9919 0852-1697 dc ANALISA PENGARUH KENAIKAN TEKANAN FLUIDA TERHADAP TEGANGAN DAN FLEKSIBILITAS PIPA BLOWDOWN A106 GRADE A BERDASARKAN ASME B31.3 Mahardhika, Pekik Politeknik Perkapalan Negeri Surabaya https://scholar.google.co.id/citations?user=fp9LMIwAAAAJ&hl=id http://orcid.org/0000-0002-5239-9741 Julianto, Eko Politeknik Perkapalan Negeri Surabaya Indartono, Arie Politeknik Perkapalan Negeri Surabaya Kusuma, George E. Jurusan Teknik Permesinan Kapal, Politeknik Perkapalan Negeri Surabaya Fleksibilitas, Pipa blowdown, Tegangan pipa akibat beban sustain, Tekanan fluida Aplikasi sistem perpipaan untuk distribusi fluida banyak di jumpai dalam kehidupan sehari-hari. Boiler di PLTU beroperasi secara kontinyu sehingga perlu dilakukan proses blowdown secara berkala. Sistem blowdown berguna untuk mengontrol dan membuang kandungan solid dalam sisa air pemanasan. Pertemuan dua zat berbeda fase dan temperatur tinggi pada pipa dapat menimbulkan kenaikan tekanan. Tekanan merupakan salah satu hal yang harus dipertimbangkan dalam sistem perpipaan. Dampak negatif kenaikan tekanan fluida secara kontinyu adalah terjadinya deformasi pipa. Deformasi pipa disebabkan tegangan pipa melebihi nilai tegangan yang diijinkan. Kode yang digunakan adalah ASME B31.3 Piping Process.  Berdasarkan kriteria critical line, pipa blowdown A106 Gr.A merupakan kategori B yang harus dikoreksi dengan metode sederhana. Fluida di dalam pipa blowdown telah terjadi kenaikan tekanan menjadi 322,55 psi dan bersifat turbulen. Berdasarkan ASME B31.3, Tegangan pipa akibat beban sustain setelah terjadi kenaikan tekanan fluida masih berada di bawah tegangan ijin (16000 psi). Fleksibilitas pipa masih di bawah nilai fleksibilitas yang diijinkan. Sistem perpipaan blowdown masih dinyatakan aman. Diponegoro University 2018-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/17118 TEKNIK; Vol 39, No 1 (2018): (July 2018) eng https://ejournal.undip.ac.id/index.php/teknik/article/download/17118/52126 Copyright (c) 2018 Teknik

oai:ojs.ejournal.undip.ac.id:article/1888 2012-02-24T10:20:44Z teknik:ART

2460-9919 0852-1697 dc PENGAMBILAN OLEORESIN DARI AMPAS JAHE (HASIL SAMPING PENYULINGAN MINYAK JAHE) DENGAN PROSES EKSTRAKSI Setia Budi, Faleh ginger-oleoresin-extraction During this time the ginger oil distillation waste are only used as fire wood for the distillation process. It ispredicted that this waste still contain oleoresin. Oleoresin is the mixture fixed oil (3 – 4 %), essential oil (1 – 3%), resin etc. This research aims to find the most affecting variable and the optimum operation condition inthe extraction processing oleoresin from ginger oil distillation waste. The research is planned to use thefactorial design method 2 levels and 3 independent variables i.e.: temperature (30-60 oC), time (2-6 hours)and solvent volume (300/150- 700/150) ml/gr the weight of ginger waste. The experiment quantities whichmust be carried out are 8 runs. The observed parameters are weight, density and refraction index. The threeindependent variables give positive effect/ increase the product and time is the most influential variables. Thenthe optimization process is carried out to get the optimum operation condition by varying the extraction time.The optimum operation condition of oleoresin extraction is 5.5 hours, temperature 60 oC and solvent volume700ml/150 gr the weight of ginger waste. The number of oleoresin which can be obtained volume 4.1 ml,weight oleoresin 2.7 grams, density 0.67 grams/ml, and refraction index 1.4744. GCMS analysis shows thatthe zingeberence content is 14.91%. Diponegoro University 2012-02-15 10:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1888 TEKNIK; Volume 30, Nomor 3, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/32949 2025-07-07T19:35:10Z teknik:ART

"220531 2022 eng " 2460-9919 0852-1697 dc Quality Service Improvement using Hybrid Big Data Analytics Model: A Case of AYCE Korean BBQ Restaurant Sukwadi, Ronald Program Studi Teknik Industri, Universitas Katolik Indonesia Atma Jaya https://orcid.org/0000-0001-6639-2041 Halim, Williem Program Studi Teknik Industri, Universitas Katolik Indonesia Atma Jaya Thu, Nguyen Thi Bich Industrial Systems Engineering, HCMC University of Technology and Education customer needs; restaurant; big data analysis; QFD; AHP Industri kuliner terus mengalami perkembangan tiap tahunnya. Salah satu yang menjadi fenomena adalah restoran all you can eat (AYCE) Korean BBQ. Hal tersebut menyebabkan semakin ketatnya persaingan usaha restoran. Tujuan penelitian ini untuk mengidentifikasi kebutuhan pelanggan, menentukan prioritas atribut layanan serta memberikan usulan perbaikannya. Model hibrid yang digunakan merupakan integrasi analisis Big Data, metode Quality Function Deployment (QFD), dan Analytical Hierarchy Process (AHP). Analisis Big Data dengan Latent Dirichlet Allocation (LDA) digunakan untuk menentukan kebutuhan pelanggan berdasarkan review Zomato. Hasilnya menunjukkan terdapat 10 kebutuhan pelanggan restoran AYCE Korean BBQ  sebagai input Voice of Customer (VOC) pada metode QFD. Hasil dari metode AHP menunjukkan 5 prioritas strategi layanan untuk memenuhi kebutuhan pelanggan. Usulan strategi tersebut adalah membuat sistem pengontrolan berlapis dan survey kepuasan pelanggan, menerapkan sistem First In First Out (FIFO) dan Last In First Out (LIFO), melakukan pengecekan tentang kondisi alat penyimpanan bahan baku, memperbaiki SOP layanan yang ada, serta memberikan briefing dan training secara berkala. Diponegoro University 2022-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/32949 TEKNIK; Vol. 43, No. 1 (2022): May 2022 ind Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/6889 2014-12-24T01:55:36Z teknik:ART

"141010 2014 eng " 2460-9919 0852-1697 dc ANALISIS PERILAKU PENGGUNA ANGKUTAN UMUM TRANSPORTASI ANTARMODA Wicaksono, Y. I. Jurusan Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, 50275 Siswanto, Joko Jurusan Teknik Sipil, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, 50275 Array [Title: Analysis of User Behaviour for Public Transport Special for Intermodes Transportation] In traveling, each rider will choose the route that gives the minimum fare. The journey can be expressed in terms of monetary cost, travel time, distance, safety, comfort, and cost is not borne by the traveler (social cost). Attributes are specific to each road segment (link), so it can’t be aggregated for a more long. Attribute segment in transport modeling approach behavior (behavioral), including 2 primary system, the system of activity attributes and attribute the traveler service systems. Pretty much the traveler who wants to use mass transit intermodal transportation. This research was conducted in the city of Semarang Metropolitan Indonesia: identify the purpose and perception of public transport user behavior on the network and create a model for inter-user behavior on public transport intermodal network. The combined value of the coeffient of determination of the overall model is 0.931. This means that the model is able to explain 93.1% inter-user behaviour. Behavioural characteristic of users of public transport in the intermodal network in the form of the number of activities that a lot, have enough users mature age, education level is high enough, is not associated with gender, the limitations of private vehicle ownwership. Perception of public transport user behaviior on the network inter-linked with the comfort, safety, convenience, capacity, quality and quantity of good network, resonable travel expenses, as well as interdiciplinary operator. Diponegoro University 2014-10-20 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/6889 TEKNIK; Vol 35, No 1 (2014): (July 2014) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/70449 2025-11-17T01:02:24Z teknik:ART

"251117 2025 eng " 2460-9919 0852-1697 dc Concrete Jacketing for Strength Enhancement of Square Columns in Corroded Reinforced Concrete Structures Amalia, Zahra Department of Civil Engineering, Faculty of Engineering, Universitas Syiah Kuala, Jl. Syech Abdurrauf No.7, Kopelma Darussalam, Kec. Syiah Kuala, Kota Banda Aceh, Aceh 23111 TDMRC, Tsunami and Disaster Mitigation Research Center, Jl. Hamzah Fansuri No.8, Kopelma Darussalam, Kecamatan Syiah Kuala Kota Banda Aceh, Aceh 23111 https://sinta.kemdikbud.go.id/authors/profile/6726373 https://orcid.org/0000-0002-6657-1610 Mahlil, Mahlil Department of Civil Engineering, Faculty of Engineering, Universitas Syiah Kuala, Jl. Syech Abdurrauf No.7, Kopelma Darussalam, Kec. Syiah Kuala, Kota Banda Aceh, Aceh 23111 Ulza, Adrian Department of Civil Engineering, Faculty of Engineering, Universitas Syiah Kuala, Jl. Syech Abdurrauf No.7, Kopelma Darussalam, Kec. Syiah Kuala, Kota Banda Aceh, Aceh 23111 TDMRC, Tsunami and Disaster Mitigation Research Center, Jl. Hamzah Fansuri No.8, Kopelma Darussalam, Kecamatan Syiah Kuala Kota Banda Aceh, Aceh 23111 Saidi, Taufiq Department of Civil Engineering, Faculty of Engineering, Universitas Syiah Kuala, Jl. Syech Abdurrauf No.7, Kopelma Darussalam, Kec. Syiah Kuala, Kota Banda Aceh, Aceh 23111 Aulia, Teuku Budi Department of Civil Engineering, Faculty of Engineering, Universitas Syiah Kuala, Jl. Syech Abdurrauf No.7, Kopelma Darussalam, Kec. Syiah Kuala, Kota Banda Aceh, Aceh 23111 Asyifa, Cut Nella Department of Civil Engineering, Faculty of Engineering, Universitas Syiah Kuala, Jl. Syech Abdurrauf No.7, Kopelma Darussalam, Kec. Syiah Kuala, Kota Banda Aceh, Aceh 23111 TDMRC, Tsunami and Disaster Mitigation Research Center, Jl. Hamzah Fansuri No.8, Kopelma Darussalam, Kecamatan Syiah Kuala Kota Banda Aceh, Aceh 23111 reinforcement corrosion; strengthened-column; concrete jacketing; lateral load; accelerated corrosion test Buildings submerged during the 2004 Aceh tsunami have shown signs of structural degradation, particularly due to corrosion in column reinforcement, raising concerns about reduced seismic performance. This study aims to evaluate the effectiveness of the concrete jacketing method in retrofitting corroded square reinforced concrete columns. Specimens measuring 200 × 200 mm² in cross-section and 580 mm in height were subjected to accelerated corrosion targeting 20% mass loss, followed by axial and lateral loading tests. The results showed that corrosion reduced shear strength by 23.93% compared to non-corroded specimens. However, retrofitted corroded square reinforced concrete column demonstrated a 15.65% increase in strength when the stirrup reinforcement yielded. However, the shear capacity showed a slight decrease compared to the corroded columns without jacketing. This unexpected reduction is attributed to the absence of joint strengthening in the retrofit, which governed the overall shear resistance. These findings highlight the importance of including joint enhancement when applying concrete jacketing for comprehensive structural recovery. Diponegoro University 2025-11-17 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/70449 TEKNIK; Vol 46, No 3 (2025): Juli 2025 ind Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/23258 2020-04-17T09:38:18Z teknik:ART

"191111 2019 eng " 2460-9919 0852-1697 dc Triyastuti, Meilya Suzan Diponegoro University Djaeni, Mohamad Kelopak bunga rosella mengandung senyawa bioaktif diantaranya Antosianin. Kelopak bunga rosella mempunyai pigmen berwarna ungu yang berpotensi sebagai zat pewarna alami untuk menggantikan pewarna sintetis Violet GB. Pigmen warna ungu ini berasal dari senyawa antosianin. Namun senyawa antosianin ini mudah terdegradasi pada temperatur diatas 70°C, sehingga diperlukan metode ekstraksi yang tepat pada kondisi optimum. Metode yang digunakan yaitu ekstraksi dengan bantuan gelombang ultrasonik (Ultrasound Assisted Extraction) dan dioptimasi menggunakan software Design Expert. Hasil penelitian menunjukkan bahwa kondisi optimum ekstraksi pada waktu ekstraksi 15 menit, rasio sampel dan pelarut 15 gr/ml dan temperatur ekstraksi 50°C dengan kadar antosianin sebesar 206,996 ppm Diponegoro University 2019-11-11 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/23258 TEKNIK; Vol 40, No. 2 (2019): Agustus 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/46469 2022-09-19T00:37:33Z teknik:ART

"220830 2022 eng " 2460-9919 0852-1697 dc ANALISIS PERUBAHAN KONSENTRASI TOTAL SUSPENDED SOLID SECARA MULTITEMPORAL MENGGUNAKAN CITRA SENTINEL 2A (STUDI KASUS: DANAU RAWA PENING, JAWA TENGAH) Sasmito, Bandi Geodetic Engineering Departement - Faculty of Engineering, Diponegoro University, Semarang-Indonesia https://orcid.org/0000-0001-8637-6727 Bashit, Nurhadi Rachmadiana, Erliza Remorte Sensing, Citra Sentinel 2A, Danau Rawa Pening, Model Algoritma, TSS Abstrak Danau Rawa Pening merupakan danau alami yang termasuk danau prioritas utama untuk dilakukan restorasi karena pertumbuhan eceng gondok yang tinggi. Pertumbuhan eceng gondok menyebabkan tertutupnya permukaan air danau dan penumpukan sedimen di dasar perairan. Sedimentasi adalah salah satu faktor penyebab munculnya Total Suspended Solid (TSS) yang menggambarkan kualitas perairan. Pemantauan perubahan kualitas perairan dapat dilakukan dengan melakukan pemetaan menggunakan metode pengindraan jauh. Pada penelitian ini pemetaan TSS dilakukan guna mencari algoritma empiris yang sesuai dengan kondisi Danau Rawa Pening dan menganalisis sebaran konsentrasi TSS melalui algoritma yang didapat. Metode yang digunakan dalam analisis konsentrasi TSS adalah pembangunan model algoritma melalui regresi data reflektan Citra Sentinel 2A tahun 2021 band 1 – 8A yang memiliki kemungkinan tinggi dalam penyerapan dan hamburan balik dari objek air dengan data TSS in situ. Percobaan penerapan regresi dipakai jika nilai  ≥ 0,5 yang menunjukkan adanya hubungan keterkaitan yang kuat antara variabel TSS in situ dan nilai reflektans band. Hasil dari penelitian ini berupa 2 model dengan nilai  ≥ 0,5 yaitu model persamaan regresi berganda menggunakan ratio band , nilai  sebesar 0,620 dan persamaan regresinya . Sebaran konsentrasi TSS di Danau Rawa Pening memenuhi kriteria baku mutu air dengan sebagian besar berada pada kelas I dan sebagaian kecil berada kelas II, III, dan IV. Konsentrasi tertinggi menggunakan perhitungan algoritma ratio band 4/6 pada tahun 2021 sebesar 0 – 258,91 mg/L dan terendah pada tahun 2020 sebesar 0 – 6,13 mg/L.   Diponegoro University 2022-07-04 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/46469 TEKNIK; Vol. 43, No. 2 (2022): August 2022 eng Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/7887 2015-10-17T03:39:04Z teknik:ART

"150704 2015 eng " 2460-9919 0852-1697 dc PERSEPSI MASYARAKAT TERHADAP KEBERADAAN SIGNAGE (Studi Kasus Jalan Tjilik Riwut di Kota Palangka Raya, Kalimantan Tengah) Nopemberi, Andri Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang Suprapti, Atiek Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang Murtomo, Bambang Adji Program Studi Magister Teknik Arsitektur, Fakultas Teknik, Universitas Diponegoro, Jl. Hayam Wuruk 5, Kampus Undip Pleburan, Semarang persepsi masyarakat; signage; Jalan Tjilik Riwut; public’s perception; tjilik riwut road Keberadaan signage disatu sisi tidak terlepas dari peran masyarakat sebagai objek konsumsi, selain itu juga seringkali penempatan signage tersebut merambah kawasan ruang publik perkotaan (public space). Dalam perkembangannya, Kota Palangka Raya sudah menggunakan signage di samping menciptakan karakter tertentu pada lingkungan, pemasangan signage juga memberikan masalah tersendiri. Konflik juga terjadi karena adanya perbedaan kepentingan antara public environmental information dan private sign. Tujuan dari penelitian ini adalah untuk mengetahui bagaimana persepsi masyarakat dari publik maupun penyedia jasa reklame serta mengetahui peran pemerintah dalam pengaturan signage. Untuk menganalisis persepsi masyarakat metode yang digunakan menggunakan metode kuantitatif rasionalistik. Metode tersebut dilakukan melalui kegiatan wawancara yang mendalam (In depth interview). Hasil Analisis menunjukan bahwa terdapat pengaruh keberadaan signage terhadap persepsi masyarkat pada koridor Jalan Tjilik Riwut. Hasil dari analisa peta mental diketahui bahwa keberadaan signage pada Jalan Tjilik Riwut ini timbul akibat persaingan antar penyedia barang dan jasa tanpa lagi memperhatikan keindahan dan keefektifan dari signage tersebut, serta tidak adanya peraturan pemerintah dalam menata jenis signage dan pemerintah Kota Palangka Raya tidak mempunyai master plan/grand design. Maka pemasangan signage belum memenuhi kriteria keindahan dan keefektifan Kota Palangka Raya sehingga mengakibatkan kekaburan informasi yang disampaikan serta signage di Jalan Tjilik Riwut. [Public Perception of the Existence of Signage (Case Study: Tjilik Riwut Road in Palangkaraya, Central Kalimantan)] The presence of signage is inseparable from the role of the society of consumers. The placement of signage often penetrates urban public areas (public spaces). During its development, Palangkaraya has been using signage that creates a particular character on the environment. However, the installation of signage also creates its own problems caused by a conflict of interest between the public environmental information signs and the private signs.This study aimed to find out the perception of the public, the advertising service providers and the government’s role in regulating signage. To analyze the perception, the method used was quantitative rationalistic. Post positivistic rationalistic approach emerged as a combination of positivism and rationalism philosophies. The method was carried out by in-depth interviews. The analysis results showed that there was significant effect of the presence of signage at the corridor of Tjilik Riwut road on public’s perception. The result of the mental map analysis was that the presence of signage on the Tjilik Riwut road emerged from competitions among providers of goods and services that neglect the fineness and effectiveness of the signage. Problems are also caused by the absence of government’s regulation in managing the types of signage and the absence of a master plan or grand design of the City of Palangkaraya. The installation of signage in Palangkaraya does not meet the criterion of fineness and effectiveness, resulting obscurity on the intended information of the signage on the Tjilik Riwut road.   Diponegoro University 2015-07-04 16:42:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/7887 TEKNIK; Vol 36, No 1 (2015): (Juli 2015) eng https://ejournal.undip.ac.id/index.php/teknik/article/download/7887/17180 Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1694 2012-02-10T06:41:42Z teknik:ART

2460-9919 0852-1697 dc DESAIN APLIKASI SIG UNTUK PELAYANAN JARINGAN PIPA PDAM ( Studi Kasus : Jaringan Pipa PDAM Demak ) Laila Nugraha, Arief Hani’ah, Hani’ah PDAM, GPS, GIS Application, Pipeline Regional water treatment and supply company (PDAM) Demak city is water utility service provider for Demakpeople. This company is one of important regional state enterprise to increase income regional of Demak City.PDAM as companies service must be build up the system that can be satisfied his consuments. One of the systemis Geographics Information System (GIS) Pipeline Aplication. The system is integrate Global Positioning System(GPS) that can knows real position pipeline routes, and programming GIS application that can makes the systemcan be operated user easily. The goal of the system is can calls back geodata of pipeline that be needed forPDAM to serve his consuments and knows area that can be covered existing pipeline routes. Diponegoro University 2012-02-02 14:48:56 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1694 TEKNIK; Volume 32, Nomor 2, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/25053 2020-07-10T16:19:04Z teknik:ART

"200531 2020 eng " 2460-9919 0852-1697 dc Djaeni, Mohamad Maulana, Kemal Pupuk lambat rilis memiliki peranan yang penting dalam mencegah hilangnya nutrisi tanaman serta meningkatkan efisiensi penyerapan. Penelitian ini bertujuan untuk memperoleh nilai koefisien difusivitas ethylcellulose melalui perbandingan antara laju rilis pellet urea eksperimen dengan laju rilis pellet urea simulasi. Penelitian ini menggunakan metode elemen hingga 2D dengan software Comsol Multiphysics. Melalui perbandingan menggunakan hasil eksperimen dengan simulasi diperoleh hasil difusivitas pada lapisan ethylcellulose bervariasi antara 6 x 10-3 - 9 x 10-3 cm2/hari dengan Root Mean Square Error (RSME) sebagai indikator error perhitungan memiliki nilai antara 0.675 - 1.791. Hasil tersebut menunjukkan bahwa model cukup baik untuk menggambarkan karakteristik difusi urea dari matriks ke air. Diponegoro University 2020-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/25053 TEKNIK; Vol 41, No. 1 (2020): May 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2077 2012-02-22T03:24:26Z teknik:ART

2460-9919 0852-1697 dc STUDI POTENSI PEMANFAATAN NILAI EKONOMI SAMPAH ANORGANIK MELALUI KONSEP DAUR ULANG DALAM RANGKA OPTIMALISASI PENGELOLAAN SAMPAH (Studi Kasus : Kota Magelang) Dwi Nugraha, Winardi Ambun Suri, Denok Syafrudin, Syafrudin Recycle, inorganic waste, economic potency Waste composition of Magelang City in the year of 2006 consists of 69, 65% organic waste and inorganicwaste 30, 35%. This composition indicates that Magelang City have potency to lessen its waste by applying3R concept and by optimizing the role of trash collector in managing inorganic waste. The existing wastemanagement condition shows that organic and inorganic wastes are not separated yet from its source. As aresult, inorganic waste (which is still economically valuable and still can be recycled) was brought to TPS.The target of this research is to find the waste amount and potency that can be recycled. These resultcontinued by planning the operational technique with 3R concept in Magelang City Waste Management.The research method in measuring volume and composition of waste is according to SNI 19-3964-1994.The result shows in year 2007, the quantity of inorganic waste that economically valuable beforeoptimalization is 1880,625 kg/day (4 %) and after optimalization is 6245,28 kg/day (13,28 %). While theincome of trash collector increase from Rp. 2.424.871,00 per day to Rp 8.052.679,00 per day. By applyingthis concep,t the waste managed by trash collector will increase495,67% from17,77 m3/day become 105,87m3/day in the year of 2023. Beside, by applying this 3R concept Magelang City can reduce the wasteoperational cost equal to 14, 27%. Diponegoro University 2012-02-10 11:26:10 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2077 TEKNIK; Volume 28, Nomor 1, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/50281 2023-10-12T21:21:38Z teknik:ART

"230830 2023 eng " 2460-9919 0852-1697 dc Design of Ergonomic Equipment for Carrying Horticultural Plants to Reduce Musculoskeletal Syndrome] Wibowo, Resalfa Amelza Soewardi, Hartomo Department of Industrial Engineering, Universitas Islam Indonesia conveyance; horticulture; QFD; musculoskeletal syndrome; garden plant Hortikultura merupakan aktivitas budidaya tanaman kebun berupa buah, sayur, bunga, dan tanaman hias. Aktivitas ini melibatkan beragam kegiatan mulai dari pembibitan hingga pendistribusian masal. Alat angkut merupakan perlengkapan pengangkutan tanaman dalam rangka mendukung kelancaran proses tersebut. Berdasarkan studi awal, pemindahan tanaman masih dilakukan secara manual dengan pengangkatan kotak seberat 9-10 kg satu per satu. Kondisi ini mengakibatkan potensi ketidakefektifan dan ketidaknyamanan dalam proses kerja yaitu adanya keluhan pada bagian bahu kanan (29%), lengan bagian kiri atas (57%) dan kanan atas (71%), lengan kiri dan kanan bagian bawah (100%), pergelangan tangan kanan (57%), dan tangan kanan (43%). Dengan demikian, modifikasi alat angkut agar lebih ergonomis penting dilakukan. Tujuan penelitian ini adalah merancang alat angkut menggunakan prinsip ergonomi. Metode Quality Function Deployment (QFD) diterapkan untuk menentukan spesifikasi desain alat angkut agar sesuai dengan kebutuhan. Survey dilakukan untuk mengindentifikasi atribut kebutuhan pengguna. Uji statistik dilakukan untuk pengujian hipotesis. Hasil penelitian membuktikan desain rancangan adalah valid memenuhi apa yang diperlukan oleh pengguna pada tingkat signifikansi 5% yaitu nyaman, mudah digunakan, kuat, serta efektif. Desain yang dirancang mampu menurunkan risiko terjadinya sindrom musculoskeletal sebesar 60% dari berisiko tinggi menjadi rendah. Dengan demikian, desain yang dikembangkan menjadi lebih nyaman dan efektif untuk dioperasikan. Diponegoro University 2023-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/50281 TEKNIK; Vol. 44, No. 2 (2023): August 2023 ind Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/9815 2020-04-17T09:31:59Z teknik:ART

"161231 2016 eng " 2460-9919 0852-1697 dc Analisis Level Kesiapan Warga Menghadapi Potensi Bencana Longsor Kota Semarang Susanto, Novie Program Studi Teknik Industri, Fakultas Teknik, Universitas Diponegoro, Semarang, Putranto, Thomas Triadi Program Studi Teknik Geologi, Fakultas Teknik, Universitas Diponegoro, Semarang indeks kesiapsiagaan; longsor; Kota Semarang; peta kesiapan; Preparedness Index; landslides; Semarang City; preparedness map Semarang memiliki morfologi bervariasi yang berpotensi terhadap bencana tanah longsor. Daerah rawan longsor ini mengakibatkan kerugian yang tidak sedikit baik sisi ekonomi sosial seperti bangunan (vihara, talud, rumah dan sebagainya) maupun nyawa manusia. Dalam hal ini manusia banyak dirugikan meskipun aktivitas manusia juga terdeteksi sebagai salah satu penyebab utama terjadinya bencana longsor. Untuk mengurangi kerugian yang mungkin ditimbulkan oleh bencana longsor di Kota Semarang perlu diketahui status kesiapsiagaan warga sehingga prioritas sosialisasi dan intervensi dapat terarah dengan baik. Metode yang digunakan dalam penelitian ini adalah mengukur indeks kesiapsiagaan warga di 19 lokasi titik penelitian rawan bencana longsor. Hasil penelitian menunjukkan secara umum, kesiapsiagaan masyarakat Semarang masuk dalam kategori “Hampir Siap” dengan nilai indeks 55,74. Terdapat 2 lokasi yang memiliki indeks kesiapsiagaan “BelumSiap” yaitu Kembang Arum dan Manyaran. Daerah Mangunharjo berada dalam kategori indeks cukup siap. Ketiga daerah ini berada di daerah dengan tingkat kerawanan cukup tinggi sehingga diprioritaskan untuk mendapatkan sosialisasi dan intervensi yang diperlukan.  [Title: Analysis of Citizens’ Preparedness Level toward Potency of Landslides Disaster in Semarang City] Semarang has different morphology and by doing so caused a high potential for landslides. This case resulted in the losses of the landslide-prone area both for the social economy such as buildings (temples, embankments, homes, etc.) and human lives. In this case, the man obtained many disadvantages although human activity is also detected as one of the main causes of the landslide. To reduce the losses, it is needed to know the status of citizens’ preparedness so that the priority of socialization and interventions can be targeted properly. The method used in this study is the measurement of the preparedness index of residents in 19 locations of landslides-prone areas. The results showed in general, the community preparedness Semarang in the category "Almost Ready" with an index value of 55.74. There are two locations that have an index of preparedness "Not Ready" namely Kembang Arum and Manyaran. Mangunharjo area is in the category of the index “Quite Ready”. Those areas are located in areas with fairly high degree of vulnerability. So they are prioritized for the socialization and the interventions. Diponegoro University 2016-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/9815 TEKNIK; Vol 37, No 2 (2016): (Desember 2016) eng Copyright (c) 2016 Teknik

oai:ojs.ejournal.undip.ac.id:article/1753 2012-02-15T04:03:20Z teknik:ART

2460-9919 0852-1697 dc PENYELIDIKAN POLA ALIRAN EMBUNG SAMIRAN DENGAN UJI MODEL HIDROLIK FISIK Ari Wulandari, Dyah Kirno, Kirno Model Hidrolik Fisik, Pola Aliran Samiran Dam is located in Grawah river, Boyolali Regency, Central Java Province. The aim of Samiran Damis for service water supply. The hydraulic model test are conducted for clarifying the appropriateness ofhydraulic design, to perfect and optimize the hydraulic design of the spillway. One of the main objective is tostudy the flow pattern approaching spillway, at spillway, stilling bazin and river in the downstream of thestilling bazin.The detail model is made as three dimensional model, covering the part of reservoir, spillway, stilling bazin andriver in the downstream of spillway. The hydraulic model test was carried out in The Hydraulic Laboratory ofExperimental Station for River in Surakarta.Base on the study result then there are necessary to modified design of the stilling bazin and to add groundsillconstruction at the river in the downstream of the stilling bazin Diponegoro University 2012-02-02 14:41:15 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1753 TEKNIK; Volume 31, Nomor 1, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/35994 2021-06-03T02:07:07Z teknik:ART

"210503 2021 eng " 2460-9919 0852-1697 dc Analysis of Temperature Regulation, Concentration, and Stirring Time at Atmospheric Pressure to Increase Density Precision of Alginate Solution Permanadewi, Indrasukma Program Studi Doktor Teknik Kimia, Departemen Teknik Kimia, Fakultas Teknik, Universitas Diponegoro Kumoro, Andri Cahyo Institute of Food and Remedies BioMaterial (INFARMA), Departemen Teknik Kimia, Fakultas Teknik, Universitas Diponegoro Wardhani, Dyah Hesti Institute of Food and Remedies BioMaterial (INFARMA), Departemen Teknik Kimia, Fakultas Teknik, Universitas Diponegoro Aryanti, Nita Program Studi Doktor Teknik Kimia, Departemen Teknik Kimia, Fakultas Teknik, Universitas Diponegoro density; alginate; temperature; concentration; stirring time Alginat merupakan polimer polisakarida linier yang sangat mudah larut dalam air dengan densitas dan viskositas yang dapat diatur sesuai keperluan. Sifat khas ini membuat alginat banyak digunakan dalam industri pangan maupun non pangan. Seperti pada kebanyakan bahan alam lainnya, densitas larutan alginat pada umumnya juga dipengaruhi oleh temperatur, konsentrasi dan waktu pengadukan. Karenanya, penelitian ini bertujuan untuk meningkatkan kepresisian densitas larutan alginat dengan pengaturan temperatur (30, 45, 60 dan 75°C), konsentrasi alginat (1, 2, 3, 4 dan 5% massa) dan waktu pengadukan (15, 30, 45 dan 60 menit) menggunakan metode piknometri. Hasil penelitian menunjukkan bahwa semakin tinggi temperatur maka densitas akan semakin rendah, sebaliknya semakin tinggi konsentrasi dan waktu pengadukan maka densitas larutan alginat akan semakin meningkat. Dengan demikian, dapat disimpulkan apabila menginginkan densitas larutan alginat 0,9228 g/ml maka konsentrasi alginat yang digunakan 2% dengan suhu 30°C dan waktu pengadukan 30 menit. Diponegoro University 2021-05-03 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/35994 TEKNIK; Vol. 42, No. 1 (2021): May 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4383 2013-01-22T02:50:02Z teknik:ART

"121015 2012 eng " 2460-9919 0852-1697 dc KINETIKA TRANSESTERIFIKASI BIODIESEL JARAK PAGAR Luqman, Buchori Setia, Budi Sasongko Array Biodiesel were produced by trans-etherification of castor oil with alcohol in the presence of NaOH catalyst. The reaction mechanism and model of castor oil trans-etherification is A + 3B C + 3 D A, B, C, and D were castor oil, alcohol, glycerol, and ester. The reaction rate equation was r=-dCA/dt = k1(CA)(CB)3–k2(CC)(CD)3. In this study was used two measurement method of free fat acid as the rest content of castor oil with SNI 01-3555-1998 and AOAC (Association of Analytical Chemist). It found that SNI 01-3555- 1998 method was the easier and the acurate measurement. The classification of alcohol used was methanol and ethanol to compare the action both of them. Methanol produces the higher conversion than ethanol. The reaction in a batch reactor with temperature 40, 50, and 60°C in atmospheric pressure as the operation condition to looking for kinetics parameter of trans-etherification. Coefficient reaction rate and activation energy were look into kinetics study. Reaction rate was a mathematics model as a function of concentration and time which solved by Runge-Kutta, multivariable optimization and SSE (some square error) method using Matlab. The activation energy (Ea) and impact factor (A) obtained by linier regression method. The result of study obtained the kinetics parameter of trans-etherification with methanol k1=1.9313x1031exp (-41.940/RT) average error 0.0010 and k2=2.7678x1025exp(-37.362/ RT) average error 0.0003. While kinetics parameter of trans-etherification with ethanol obtained k1=1.168x1019exp(-24.588/ RT) average error 0.0306 and k2=4.9966x106exp(-10.328/RT) average error 0.1589. It means, more reactive alcohol then bigger the value of kinetics parameter. Diponegoro University 2012-07-12 10:30:29 https://ejournal.undip.ac.id/index.php/teknik/article/view/4383 TEKNIK; Volume 33, Nomor 2, Tahun 2012 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/62677 2025-04-17T01:00:27Z teknik:ART

"240830 2024 eng " 2460-9919 0852-1697 dc Hansen, Seng Agung Podomoro University https://orcid.org/0000-0003-3474-6065 Sektor konstruksi memiliki kontribusi yang signifikan dalam perekonomian nasional. Namun demikian, berbagai permasalahan yang muncul di industri konstruksi turut mempengaruhi perkembangan sektor yang vital ini. Penelitian ini bertujuan untuk menginvestigasi berbagai permasalahan yang menghambat perkembangan industri konstruksi di Indonesia. Melalui pendekatan mixed method, penelitian ini berhasil mengidentifikasi 54 faktor penghambat melalui Integrative Literature Review (ILR). Selanjutnya survei kuisioner dilaksanakan untuk mengukur persepsi praktisi konstruksi di Indonesia terkait frekuensi permasalahan yang ada. Data yang berhasil diperoleh sebanyak 114 respon dan dianalisis dengan pendekatan Relative Importance Index (RII) untuk memperoleh peringkat frekuensi faktor penghambat industri konstruksi di Indonesia. Adapun lima peringkat teratas faktor penghambat secara keseluruhan adalah perubahan desain atau lingkup pekerjaan, diikuti dengan tender yang kompetitif, permasalahan terkait aspek pembayaran, keterbatasan waktu atau pelaksanaan pekerjaan yang, dan lembur yang berlebihan. Selain itu, penelitian ini juga melakukan pemeringkatan berdasarkan perspektif pemilik proyek, konsultan, dan kontraktor agar memperoleh pemahaman yang lebih mendalam terkait faktor penghambat berdasarkan afiliasi praktisi. Secara umum, penelitian ini berkontribusi sebagai bahan rujukan bagi para pemangku kepentingan untuk memetakan faktor-faktor yang menjadi penghambat utama dalam industri konstruksi sehingga dapat dilakukan perencanaan mitigasi guna mengatasi faktor penghambat tersebut. Dengan demikian, diharapkan dapat memacu pertumbuhan industri konstruksi Indonesia secara berkelanjutan. Diponegoro University 2024-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/62677 TEKNIK; Vol 45, No 2 (2024): August 2024 ind Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/12234 2020-04-17T09:35:38Z teknik:ART

"180731 2018 eng " 2460-9919 0852-1697 dc Optimasi Distribusi Lubang Pada Balok Baja Kastela Partono, Windu Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro Sukamta, Sukamta Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro Hardiyati, Siti Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro Budi, Listiyono Departemen Teknik Sipil, Fakultas Teknik, Universitas Diponegoro baja kastela; FEM; jarak lubang; ukuran lubang Balok baja kastela adalah profil baja yang dikembangkan dari profil I yang dipotong bagian badan dan disambung lagi sedemikian rupa sehingga membentuk lubang pada bagian badan.  Bentuk lubang profil balok baja kastela pada umumnya adalah persegi enam (heksagonal). Pembuatan balok baja kastela perlu memperhatikan jarak antar lubang agar balok mempunyai kemampuan menahan beban tertinggi. Tulisan ini menyajikan hasil penelitian untuk menentukan jarak antar lubang yang optimum pada balok baja kastela dengan mempertimbangkan distribusi tegangan, deformasi, dan kelelehan pada balok tersebut. Penelitian diawali dengan perhitungan menggunakan metode Elemen Elemen Hingga (Finite Element Method /FEM) kemudian dilanjut dengan pengujian di laboratorium. FEM dilakukan untuk menentukan ukuran dan jarak antar lubang optimum pada balok kastela. Variasi sudut bukaan lubang dilakukan antara 45o sampai 70o. Hasil analisis FEM kemudian diujikan di laboratorium dengan ukuran dan jarak antar lubang optimum untuk mengevaluasi perbedaan hasilnya. Hasil penelitian menunjukkan lubang profil dengan kemiringan antara 45o sampai 70o sebaiknya dibuat dengan jarak antar lubang antara 0.1 sampai 0.25 dari tinggi profil balok kastela dengan distribusi lubang terbaik adalah antara 5 sampai 7 lubang per meter. Diponegoro University 2018-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/12234 TEKNIK; Vol 39, No 1 (2018): (July 2018) eng Copyright (c) 2018 Teknik

oai:ojs.ejournal.undip.ac.id:article/1866 2012-02-15T03:26:54Z teknik:ART

2460-9919 0852-1697 dc PEMODELAN TIME-DEPENDENT BEHAVIOR MATERIAL DENGAN MENGGUNAKAN ELEMEN SPRING DAN DASHPOT Wibowo, Hardi time-dependent behavior, creep compliance, material model. To model behavior of material, there are two basic models of the material element i.e.: spring and dashpot.In many cases, time-dependent behavior of a material can not enough be used just one or two basic modelof the material element. To model time-dependent behavior of a material, combination of many basicmaterial elements should be used. The most important of long term behaviors of concrete material is creepbehavior. Many equation of creep prediction of the concrete materials have been proposed to manydesign specification and rule design, i.e.: American Concrete Institute (ACI), CEB/FIP 78 and 90, Bażant-Panula, Sakata, etc. This paper will be considering and demonstrating how to model creep compliancebased on creep coefficient as used by ACI-209 by using assembly of those basic material element Diponegoro University 2012-02-02 14:36:47 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1866 TEKNIK; Volume 30, Nomor 2, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/36499 2021-12-16T21:29:52Z teknik:ART

"211217 2021 eng " 2460-9919 0852-1697 dc Ayyubi, Shalahudin Nur Department of Chemical Engineering, Universitas Diponegoro Kusmiyati, Kusmiyati Purbasari, Aprilina Pratiwi, Wahyu Zuli Perhatian terhadap biopolimer pada zaman sekarang semakin meningkat disebabkan oleh banyaknya bahan kemasan berbasis plastik yang tak dapat terurai secara alami. Kitosan dapat dijadikan sebagai alternatif pengganti polimer sintetik untuk material yang baru. Untuk melihat kesesuaian suatu material sebagai bahan pengemas makanan, perlu dilakukan kajian terhadap sifat mekanik dan permeabilitas. Sifat mekanik digunakan untuk memprediksi perilaku film selama pengangkutan, penanganan dan penyimpanan makanan kemasan. Sifat penghalang memainkan peran kunci dalam menjaga kualitas produk makanan. Sifat mekanik dan permeabilitas film kitosan murni cocok untuk kemasan makanan dan kemasan aktif. Sifat-sifat ini dapat dimodifikasi dengan menggabungkan kitosan dengan material lain seperti pemplastis, polisakarida, protein dan lipid. Kombinasi ini menyesuaikan sifat-sifat hasil polimer akhir untuk memperpanjang masa simpan makanan, sambil mempertahankan sifat kualitas makanan dan kemampuan terurai secara alami dari polimer tersebut. Kitosan juga menunjukkan aktivitas antimikroba yang baik terhadap berbagai macam jamur makanan, ragi, dan bakteri gram negatif dan gram positif. Sifat antimikroba ini telah menjadikan kitosan sebagai polimer untuk pengembangan kemasan aktif dengan kemampuan menghambat pertumbuhan mikroorganisme serta meningkatkan keamanan pangan. Diponegoro University 2021-12-17 04:29:52 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/36499 TEKNIK; Vol 42, No. 3 (2021): December 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/6722 2014-12-24T02:20:43Z teknik:ART

"131203 2013 eng " 2460-9919 0852-1697 dc KAJIAN PEMANFAATAN DEM SRTM & GOOGLE EARTH UNTUK PARAMETER PENILAIAN POTENSI KERUGIAN EKONOMI AKIBAT BANJIR ROB L Nugraha, Arief Staf Pengajar Jurusan Teknik Geodesi Fakultas Teknik Universitas Diponegoro Hani’ah, Hani’ah Staf Pengajar Jurusan Teknik Geodesi Fakultas Teknik Universitas Diponegoro Array Tidal flood is a significant threat for the economic growth rate in the city of Semarang. The threat mitigation requires planning, thereby reducing the impact of the losses. The availability of global data with free access can provide solutions in disaster management, the data are SRTM DEM and Google Earth. With both of these data can be mapped potential economic losses caused by tidal flooding. With the techniques of remote sensing and GIS to handle the SRTM DEM data and Google Earth, the techniques can be generated maps and models of tidal inundation area maps woke up in the city of Semarang. Analysis of potential economic losses can be calculated by doing an overlay of the two maps generated. The results achieved from this study is SRTM DEM and Google Earth can able to produce thematic maps of situational tidal flood disaster so that it can be used as a parameter value calculation of the potential economic losses. This study also obtain the result that the area of ​​land affected by the tidal flood an area of ​​8339.31 hectares and the number of buildings reaching 78 299 pieces, which the district that has the highest impact on the tidal flood that North Semarang. Diponegoro University 2013-12-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/6722 TEKNIK; Volume 34, Nomor 3, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67662 2025-07-07T19:46:40Z teknik:TE

"250322 2025 eng " 2460-9919 0852-1697 dc Analysis of The Potential and Challenges of Developing Bagasse as Bioethanol Fuel Jovanka, Hanabell Department of Chemistry Jl. Veteran No.10-11, Ketawanggede, Kec. Lowokwaru, Kota Malang, Jawa Timur 65145|Universitas Brawijaya Anindita, Fransisca Chiara Department of Biosystem Engineering Jl. Veteran No.10-11, Ketawanggede, Kec. Lowokwaru, Kota Malang, Jawa Timur 65145|Universitas Brawijaya bioetanol; BBM; transportasi; ampas tebu; selulosa Bioethanol is an alternative energy source to fossil fuels derived from plant materials containing cellulose, such as sugarcane bagasse. According to data from the Ministry of Energy and Mineral Resources of the Republic of Indonesia, fuel consumption in Indonesia reached 29.68 million kiloliters in 2022. Transportation contributes the largest share of emissions at 80%. This study will review the potential and challenges of increasing bioethanol use as a 15% blend in non-diesel fuels by 2025. The research utilizes secondary data to produce solutions addressing these issues, concluding the overall analysis. The use of sugarcane bagasse as a bioethanol feedstock offers several advantages over traditional fuels, including (1) reducing carbon monoxide emissions by 19-25%, (2) lowering fuel costs, and (3) increasing octane value. Despite these benefits, bioethanol utilization faces challenges such as (1) the need for further research, (2) the requirement for advanced and expensive technology, and (3) raw material availability. Presidential Instruction No. 1/2006 emphasizes the need for biofuels, making this review essential. The study identifies steps to maximize the potential of bioethanol in reducing emissions and minimizing challenges. Diponegoro University 2025-02-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67662 TEKNIK; Vol 46, No 1 (2025) January 2025 eng Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/24218 2020-03-17T01:25:09Z teknik:EI

"190531 2019 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi front-matter jurnal Teknik Volume 40 Nomor 1 Tahun 2019, yaitu meliputi halaman sampul, fokus dan ruang lingkup Teknik, informasi indeksasi, susunan tim penyunting dan mitra bebestari, kata pengantar editor dan daftar isi. Diponegoro University 2019-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/24218 TEKNIK; Vol 40, No. 1 (2019): Mei 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1933 2012-08-08T06:08:30Z teknik:ART

2460-9919 0852-1697 dc RANCANG BANGUN KOTAK PENYIMPAN IKAN BERINSULASI UNTUK MEMPERTAHANKAN KUALITAS IKAN DENGAN PROSES PENDINGINAN SERTA APLIKASINYA PADA IKAN TONGKOL (AUXIS THAZARD) Tuti Susanti, Margaretha Purba, Parhimpunan coolbox with insulation- fish preservation with low temperature Fish Cooler Box Have Designed With Measurement 50 X 70 X 40 Cm, with layers box wall and the partfrom out box : fiber glass, strerofoam wood and fiber glass. The boxes will be aplicate for tongkol fish(Auxis thazard) preservation. Variation that done in this research is comparation between ice and fish.topreservation times. Parameter that measured are fish quality like : fat degradation with TMA method,protein degradation with TVB method, rotten with TMAO method, and organoleptic test like : smell,appearence, texture. Result of this research with that parameter tests are : comparation between ice andfish 2:1, but with comparation 1:1 fish quality is still good for consumption Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1933 TEKNIK; Volume 29, Nomor 2, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/7184 2015-02-01T00:05:47Z teknik:ART

"141230 2014 eng " 2460-9919 0852-1697 dc STUDI PENURUNAN MUKA TANAH (LAND SUBSIDENCE) MENGGUNAKAN METODE PERMANENT SCATTERER INTERFEROMETRIC SYNTHETIC APERTURE RADAR (PS-INSAR) DI KAWASAN KOTA CIMAHI - JAWA BARAT Prasetyo, Yudo Program Studi Teknik Geodesi, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang 50275 Subiyanto, Sawitri Program Studi Teknik Geodesi, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang 50275 Array Proses atau pergerakan penurunan muka tanah telah banyak terjadi di berbagai wilayah di seluruh dunia khususnya kota-kota besar. Dampak dari penurunan muka tanah adalah kerusakan infrastruktur wilayah pemukiman dan gangguan terhadap stabilitas ekonomi dan kehidupan sosial di wilayah tersebut. Oleh sebab itu, kita memerlukan sistem mitigasi bencana alam yang memiliki kemampuan menyajikan analisis kebumian secara cepat dan optimal dalam konsep kajian cepat. Teknologi penginderaan jauh memiliki kemampuan untuk meliput area pengamatan yang luas dalam waktu singkat serta terkait dengan tipikal iklim di Indonesia yang terletak di area tropis (intensitas dan sebaran tutupan awan yang tinggi). Pemilihan teknologi radar adalah salah satu solusi yang baik untuk pemetaan spasial pada estimasi penurunan muka tanah. PS-InSAR adalah metode terbaru dari pemrosesan citra RADAR dimana memberikan akurasi yang baik dan meminimalkan efek dekorelasi. Metode PS-InSAR diterapkan pada wilayah Indonesia merupakan solusi yang tepat karena kemampuannya menembus ketebalan awan dan kabut tebal. Metode ini digunakan dalam analisis penurunan muka tanah pada kota Cimahi-Propinsi Jawa Barat diman hasilnya 17.97 mm/yr ± 11.5 mm/yr. Kecamatan Cimahi Utara memiliki kecepatan penurunan muka tanah tertinggi sebesar 22.9 mm/yr ± 12,7 mm/yr. Metode ini terbukti sebagai salah satu metode penginderaan jauh yang baik untuk meneliti pergerakan penurunan muka tanah. [Land Subsidence Study Using Permanent Scatterer Interferometric Synthetic Aperture Radar (PSINSAR) Method in Cimahi City Area-West Java] Process or movement of land subsidence has a lot going on in various regions of the world especially in big cities. The impact of land subsidence can damage urban infrastructure and a disruption to the economic stability and social life in the region. Because of it, we need a natural disaster mitigation system that is able to provide rapid and optimal a geoscience analysis in the concept of quick assessment. A remote sensing technology has the ability to assess large areas in a short time and related with the typical climate of Indonesia that lies in a tropical area (intensity and extensive high cloud cover). Selection of radar technology is one solution that is good for spatial mapping in land subsidence estimation. PS-InSAR is the newest method in RADAR image satellite processing which is give a good accuracy and minimize decorellation effects. PS-InSAR method implementation in Indonesia area is a good solution because this method can penetrate heavy dense clouds and fogs. This method was used in land subsidence analysis at Cimahi City-West Java Province which is result arounds 17.97 mm/yr ± 11.5 mm/yr. The South Cimahi District has a highest land subsidence rate arounds 22.9 mm/yr ± 12,7 mm/yr. This method has been proven as one of a good remote sensing method to investigate land subsidence movement. Copyright (c) 2014 by Fakultas Teknik, Undip. All right reserved. Diponegoro University 2015-01-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/7184 TEKNIK; Vol 35, No 2 (2014): (Desember 2014) eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/1682 2012-02-10T07:42:07Z teknik:ART

2460-9919 0852-1697 dc STUDY OF THE PIEZOMETRIC SURFACE AND HYDROCOMPACTION AT CONFINED AQUIFER CAUSED THE LAND SUBSIDENCE IN SEMARANG Fahrudin, Fahrudin Najib, Najib Piezometric surface, hydrocompaction, land subsidence. Semarang city has experienced of the land subsidence that be caused by intake groundwater in confined aquiferabundant. The land subsidence happened during range of time 20 years, it’s critical boundary so that result theenvironmental damage. Hence needed a study of cause of the land subsidence. This study aim to know theposition of piezometric surface and also explain the mechanism hydrogeology when happened the landsubsidence. The study of spreading aquifer has been done by the analysis of secondary data which is in the formof drilling log data, piezometric surface and soil mechanics test obtained from PLG (Environmental Center ofGeology) Bandung. Later then, between the land subsidence and piezometric surface be overlay becamezonation. From the data made a analysis of cause of the land subsidence. This aquifer has the land subsidence.The land subsidence explainable with the experienced phenomenon fact for example degradation of piezometricsurface at confined aquifer and process of hydrocompaction. That process influenced by two factors that areassess the pore number (e) and specific gravity (Gs). The degradation of piezometric surface formed the trapezeof water table until 20 m from sea level with the mean 0.7 - 1.1 m/year. Hydrocompaction cause the degradationof number of mean pore 0.145 - 0.5 and specific gravity 0.009 - 0.073 . The degradation of piezometric surfaceand process the hydrocompaction cause the fast of land subsidence around 0.5 - 1.75 cm/year. Diponegoro University 2012-02-02 14:47:08 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1682 TEKNIK; Volume 32, Nomor 1, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/28562 2020-03-17T01:25:53Z teknik:EI

"191231 2019 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi back-matter jurnal Teknik Volume 40 Nomor 3 Tahun 2019 yang memuat petunjuk penulisan dan pengiriman artikel jurnal Teknik Diponegoro University 2019-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/28562 TEKNIK; Vol 40, No. 3 (2019): Desember 2019 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2037 2012-02-21T03:44:51Z teknik:ART

2460-9919 0852-1697 dc PENENTUAN KONDISI OPERASI OPTIMAL PADA PENYULINGAN MINYAK NILAM Setyoko, Bambang patchauly, optimation condition operation. Patchauly distillation is a process where oil can exctract from patcahauly’s leaf, branch, stem and root.Patchauly’s branch, stem and root had randement lower than patchauly’s leaf.This research used vacuum distillation methode at low temperature and low pressure. The experiment wasdone repeatedly at different pressure and temperature. Than experiment’s data was analysed in laboratoryand compared than standard.The highest purity of patchauly oil is 28 %, efficiency 2,5 % at temperature 80oC and used pressure -50 cmHg Diponegoro University 2012-02-10 11:26:10 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2037 TEKNIK; Volume 28, Nomor 1, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/50957 2023-06-25T22:39:35Z teknik:ART

"230531 2023 eng " 2460-9919 0852-1697 dc Napitupulu, Edward Danner Departement of Civil Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275 PT Pelabuhan Indonesia (Persero) https://orcid.org/0000-0002-5280-3951 Jinca, Muhammad Yamin Riyanto, Bambang Kelancaran lalu lintas petikemas terutama dari pelabuhan menuju lokasi hinterland dan begitu pula arah sebaliknya merupakan harapan dari semua pihak terkait. Perlu sinergi komponen system transportasi antara pelabuhan, fasilitas jalan dan truk petikemas. Sinergi yang terjadi guna meminimalisasi kongesti atas pergerakan petikemas dengan moda transportasi darat khususnya melalui truk petikemas. Indikator utama  terjadinya kongesti adalah faktor tanjakan sebagaimana hasil penelitian tahun 2013 atas faktor kongesti perjalanan truk dari Pelabuhan Tanjung Emas ke wilayah hinterlan yaitu Ungaran, Kabupaten Semarang.. Hasil tersebut tetap sama untuk hasil penelitian dan tahun 2019.  Dampak adanya faktor tanjakan ini adalah penurunan kecepatan tempuh ideal yang semestinya dialami oleh truk petikemas. Penelitian ini bertujuan menemukan besaran waktu tempuh di tanjakan dan karakteristik yang timbul atas dinamika perbedaan slope pada tanjakan dari hasil 60 sampling truk petikemas pada tahun 2019. Analisis dilakukan melalui metode Weight In Motion (WIM) dengan pengolahan persamaan regresi deskriptif dan uji model dengan software Minitab 18. Indikator tanjakan memberikan kontribusi kongesti sebesar 34,36% dibandingkan indikator lainnya sedangkan variabel yang mempengaruhi faktor tanjakan adalah kecepatan truk dan length of segment. Nilai perlambatan kecepatan tempuh yang terjadi sebesar 21,59 km/jam dengan konsumsi bahan bakar minyak sebesar 1,9 km per liter. Diponegoro University 2023-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/50957 TEKNIK; Vol. 44, No. 1 (2023): May 2023 ind Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/46439 2022-09-19T00:37:33Z teknik:ART

"220828 2022 eng " 2460-9919 0852-1697 dc Human Action Recognition (HAR) Classification Using MediaPipe and Long Short-Term Memory (LSTM) Putra, Ichsan Arsyi Departemen Teknik Komputer, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, S.H., Tembalang, Semarang, Indonesia 50275 https://orcid.org/0000-0003-0900-836X Nurhayati, Oky Dwi Departemen Teknik Komputer, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, S.H., Tembalang, Semarang, Indonesia 50275 https://orcid.org/0000-0001-5893-0321 Eridani, Dania Departemen Teknik Komputer, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, S.H., Tembalang, Semarang, Indonesia 50275 https://orcid.org/0000-0001-9337-3487 Classification; Deep Learning; Human Action Recognition; MediaPipe; Long Short-Term Memory Human Action Recognition is an important research topic in Machine Learning and Computer Vision domains. One of the proposed methods is a combination of MediaPipe library and Long Short-Term Memory concerning the testing accuracy and training duration as indicators to evaluate the model performance. This research tried to adapt proposed LSTM models to implement HAR with image features extracted by MediaPipe library. There would be a comparison between LSTM models based on their testing accuracy and training duration. This research was conducted under OSEMN methods (Obtain, Scrub, Explore, Model, and iNterpret). The dataset was preprocessed Weizmann dataset with data preprocessing and data augmentation implementations. Video features extracted by MediaPipe: Pose was used in training and validation processes on neural network models focusing on Long Short-Term Memory layers. The processes were finished by model performance evaluation based on confusion matrices interpretation and calculations of accuracy, error rate, precision, recall, and F1score. This research yielded seven LSTM model variants with the highest testing accuracy at 82% taking 10 minutes and 50 seconds of training duration. Diponegoro University 2022-07-04 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/46439 TEKNIK; Vol. 43, No. 2 (2022): August 2022 eng https://ejournal.undip.ac.id/index.php/teknik/article/download/46439/146083 Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1743 2012-02-10T06:29:29Z teknik:ART

2460-9919 0852-1697 dc PREDIKSI TEMPERATUR RESERVOAR PANASBUMI DENGAN MENGGUNAKAN METODA GEOTERMOMETER KIMIA FLUIDA Aribowo, Yoga geothermometry, reservoir temperature, mineral solubility In the preliminary study of Geothermal field development, one the most important thing to observe istemperature capacity of the geothermal reservoirs. One of several method to get subsurface temperature datathat low cost and reliable is geothermometry method. With just surface investigation of the geothermal prospectand fluid geochemistry analysis, it is possible to make a prediction how hot reservoir fluids are. The subsurfacetemperature prediction is based on physical and chemical properties of some chemical constituent. Temperaturedependant solubility of many chemical consituent of geothermal fluids such as silica, chloride, and Na. Diponegoro University 2012-02-02 14:47:46 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1743 TEKNIK; Volume 32, Nomor 3, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/29936 2021-05-06T06:54:02Z teknik:ART

"201128 2020 eng " 2460-9919 0852-1697 dc The Potential Of Steel Wire As A Binder With Plates To Withstand Loads Saragih, Deardo Samuel Department of Civil Engineering, Simalungun University Sianturi, Novdin Manoktong Department of Civil Engineering, Simalungun University Purba, Virgo Erlando Department of Civil Engineering, Simalungun University Damanik, Dermina Roni Santika Department of Civil Engineering, Simalungun University connection; pile; slab; steel wires; settlement; uniform load Konstruksi jalan dan jembatan perlu didukung dengan sistem yang kuat, baik dari segi material maupun sambungan antar elemen strukturnya. Sistem sambungan perkuatan tiang dengan pelat pendukung konstruksi di atasnya perlu diperhatikan agar dapat bekerja secara bersama-sama dalam memikul beban. Oleh karena itu penelitian dibutuhkan untuk mengetahui seberapa besar pengaruh kawat baja sebagai pengikat tiang dengan pelat dalam menahan beban terbagi rata di atasnya. Penelitian ini dilakukan dengan uji model di laboratorium pada media uji yang diperkuat dengan sistem tiang dengan pelat. Sambungan tiang dibedakan terikat dan tidak terikat dengan sempurna. Analisis reduksi penurunan dilakukan pada perbedaan penurunan untuk tiang yang terikat dan tidak terikat. Hasil penelitian menunjukkan bahwa kinerja sistem tiang yang terikat dengan kawat baja pada pelat lebih baik dalam menahan beban. Hal ini diketahui dari reduksi penurunan pada tiang yang terikat dengan yang tidak terikat didapatkan sebesar 11,43% untuk tahapan waktu dan 11,51% untuk tahapan beban. Sistem dapat bekerja secara bersama-sama, sehingga kestabilan konstruksi lebih terjaga dan lebih tahan lama. Diponegoro University 2020-11-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/29936 TEKNIK; Vol 41, No. 3 (2020): December 2020 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/29936/87191 Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/3789 2012-07-18T08:47:52Z teknik:ART

"120409 2012 eng " 2460-9919 0852-1697 dc MODEL OPTIMASI LOKASI POS PEMADAM KEBAKARAN (Studi Kasus: Kota Semarang) Bagir, Mohamad Buchori, Imam Array Fire is one of the hazards that often occur in urban areas. Many Indonesian cities usually lack of adequatepublic facilities and infrastructures, including facilities of fire hazard. It is important to reduce the risk of firehazard by optimizing the location of fire stations as facility of emergency around the city, so that the impact oflosses can be reduced. For this, defining the location and distribution of fire station should be well considered.This paper aims to discuss the development of an optimization model for fire stations’ location, developed basedon the actual quantity of flammable material, building density, accessibility and the road classes, as a networkanalysis model of Geographic Information System (GIS). In order to observe whether the developed model canwork well, Semarang City is selected as the case study.The application shows that the developed model is satisfy and is able to represent 77.29% of the real conditionof the road network. It is also revealed that the fire stations of Semarang City just presently cover 34.32% of itsarea. Therefore, it is suggested to add six new fire stations, located in Kecamatan Ngadirejo, Tlogo Mulyo,Sambiroto, Pudak Payung, Jatingaleh, and Gunungpati. Diponegoro University 2012-07-12 10:29:15 https://ejournal.undip.ac.id/index.php/teknik/article/view/3789 TEKNIK; Volume 33, Nomor 1, Tahun 2012 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/59720 2025-04-24T18:11:04Z teknik:ART

"240613 2024 eng " 2460-9919 0852-1697 dc Exploring Wear Characteristics of AISI 1045 Steel under Variable Disc Rotation Speeds: A Tribological Investigation Afif, Ilham Yustar Department of Mechanical Engineering, University of Muhammadiyah Semarang Jl. Kedungmundu No.18, Kedungmundu, Tembalang, Semarang City, Central Java (50273) https://orcid.org/0000-0002-5828-294X Jamari, Jamari Saputra, Eko Saefudin, Slamet Subri, Muhammad Amin, Muh. AISI 1045 steel; disc rotation speeds; specific wear rate; tribology; wear volume Reliable mechanical components are the desired final product. When mechanical components come into contact with each other, there is a possibility of failure. Contact between components can result in friction leading to wear. Friction and wear can be studied through the science of tribology. The aim of this paper is to investigate the wear of AISI 1045 steel using a pin-on-disc tribometer with varying disc rotation speeds (rpm), to calculate the values of wear volume and specific wear rate. This research demonstrates that variations in disc rotation speed influence changes in sliding distance, wear width, wear volume, and specific wear rate on AISI 1045 steel pin. The conclusion drawn from this study is that as the disc rotation speed increases, the wear volume increases, and the specific wear rate decreases. Diponegoro University 2024-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/59720 TEKNIK; Vol. 45, No. 1 (2024): May 2024 eng https://ejournal.undip.ac.id/index.php/teknik/article/download/59720/192254 Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/13985 2020-04-17T09:34:51Z teknik:ART

"171229 2017 eng " 2460-9919 0852-1697 dc Pembuatan Briket Arang Dari Campuran Tempurung Kelapa dan Serbuk Gergaji Kayu Sengon Anggoro, Didi Dwi Departemen Teknik Kimia, Fakultas Teknik, Universitas Diponegoro Wibawa, Muhammad Hanif Dzikri Departemen Teknik Kimia, Fakultas Teknik, Universitas Diponegoro Fathoni, Moch Zaenal Departemen Teknik Kimia, Fakultas Teknik, Universitas Diponegoro briket; arang tempurung kelapa; arang serbuk kayu sengon; perekat Indonesia merupakan negara tropis yang memiliki potensi dalam pengembangan energi terbarukan berupa energy biomassa dari briket tempurung kelapa. Briket ini merupakan hasil pengolahan limbah biomasa, diantaranya tempurung kelapa dan serbuk kayu. Tujuan penelitian ini adalah untuk mengetahui pengaruh suhu, konsentrasi perekat dan komposisi bahan baku terhadap nilai kalor  briket. Bahan yang digunakan antara lain serbuk gergaji sengon, tempurung kelapa, tepung tapioka, aquadest. Alat yang digunakan kiln drum, alat pengempa briket, bom kalorimeter, oven, alat screening. Variabel berubah dalam percobaan adalah komposisi bahan baku dan kadar perekat. Langkah penelitian dilakukan dengan pengarangan bahan baku, pencampuran komposisi bahan baku dengan variabel perekat, pencetakan dan pengempaan, uji coba nilai kalor, terakhir analisa data. Hasil pengujian nilai kalor briket bahwa semakin banyak komposisi bahan yang memiliki kalor lebih tinggi maka nilai kalor  campuran briket akan semakin tinggi. Nilai kalor briket sampel tidak memenuhi syarat untuk briket arang buatan Amerika, Inggris, dan Jepang namun diantaranya memenuhi syarat standar nasional Indonesia. Penambahan perekat dalam  pembuatan briket tempurung kelapa dimaksudkan agar partikel arang saling berikatan dan tidak mudah hancur, namun penambahan perekat yang berlebih akan menurunkan kualitas briket, semakin tinggi kadar perekat maka nilai kalor akan berkurang Diponegoro University 2017-12-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/13985 TEKNIK; Vol 38, No 2 (2017): (Desember 2017) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1822 2012-02-15T03:18:19Z teknik:ART

2460-9919 0852-1697 dc STUDI PERENCANAAN SISTEM UNTUK PENDUKUNG KEPUTUSAN PROYEK KAPAL BANGUNAN BARU Suyadi, Suyadi improvement, shipbuilding, order, shipyard and management Since Presidential decree No 5 2005 on the empowerment of the Indonesian shipping industry applies, theIndonesian shipbuilding industry has officially gained support from the Indonesian government to be able tocompete in the national as well as international market. Along with the globalization era and a lot ofshipbuilding orders, the shipyard management has to do some improvement to the shipyard to be morecompetitive. One of efforts that should be done is by improving the management of incoming orders. This isvery important to do because during this time the shipyard management has to collect a lot of informationfrom departments in the shipyard manually to consider accepted shipbuilding orders.In this paper, a new model to manage new shipbuilding orders is developed. The model is implementedwithin a computer-based decision support system that is related to an existing system of production, planningand control in the shipyard. The approach used in the development of this system is ROMC (Representation,Operation, Memory Aids and Control Mechanism).The aim of the developed decision support system is to assist all decision makers in defining problems,developing alternative solution; , and chosing various alternative decisions in the system development thereare three steps to be done : (i) building data base, (ii) building model base, and (iii) building dialogue base Diponegoro University 2012-02-02 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1822 TEKNIK; Volume 30, Nomor 1, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/39642 2021-08-29T17:46:58Z teknik:ART

"210826 2021 eng " 2460-9919 0852-1697 dc Reactivation of the Spent Residue Fluid Catalytic Cracking (RFCC) Catalyst through Acid Treatment for Palm Oil Cracking to Biofuels Amalia, Rahma Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro, Semarang, Central Java 50275, Indonesia. Riyanto, Teguh Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro, Semarang, Central Java 50275, Indonesia. https://orcid.org/0000-0002-3553-4219 Istadi, Istadi Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro, Semarang, Central Java 50275, Indonesia. https://orcid.org/0000-0002-2914-3545 Spent RFCC catalyst; acid treatment; catalyst properties; catalytic cracking; palm oil; biofuels This work discusses the treated spent Residue Fluid Catalytic Cracking (RFCC) catalysts using sulfuric or citric acids to examine the impact of acid treatment on the catalyst physicochemical properties and structural characteristics. The catalysts were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), and Brunauer−Emmett−Teller-Barrett−Joyner−Halenda (BET-BJH) methods. The catalytsts were performed in a continuous fixed-bed reactor for catalytic cracking of palm oil. Changes of the catalyst characteristics and catalytic performance testing of the catalyst after the acid treatment for palm oil cracking process were discussed. It was found that the acid treatment on the spent RFCC catalyst can increase the surface area and pore volume of catalysts as well as the crystallinity. The closed pores in the spent RFCC are opened by acid treatment by eliminating heavy metals. Concerning to the catalytic performance, the acid-treated catalysts had better performance than the non-treated catalyst, which could increase selectivity of the kerosene-diesel range fraction from 47.89% to 55.41%. It was interested, since the non-treated catalyst could not produce gasoline fraction, while the acid-treated catalsysts could produce gasoline fraction at selectivity range of 0.57 – 0.84%. It was suggested that both sulfuric or citric acids treatment could increase the cracking performance of spent RFCC catalyst by shifting the product to lower hydrocarbons. Diponegoro University 2021-08-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/39642 TEKNIK; Vol. 42, No. 2 (2021): August 2021 eng Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/5634 2017-07-19T17:16:53Z teknik:ART

"130913 2013 eng " 2460-9919 0852-1697 dc PENGARUH KARAKTERISTIK KARYA YB. MANGUNWIJAYA TERHADAP KARAKTER VISUAL PERMUKIMAN BANTARAN SUNGAI STUDI KASUS: KAMPUNG CODE UTARA, YOGYAKARTA Puspitasari, Ayu Wandira Pandelaki, Edward Endrianto Setioko, Bambang Array Settlement of north Kampung Code which located on the riverbanks of Kali Code in Yogyakarta, has a diverse visual character, so that visually appear to be dynamic and irregular.Yusuf Bilyarta Mangunwijaya participate fully in shaping the visual character of the settlement of the north Kampung Code. The aim of this research is to know the effect of characteristics design of YB. Mangunwijaya on the visual character of settlement riverbank in the North Kampung Code. Quantitative-rasionalistic method was used in this research, based on the results of respondents answer in observation the visual character of the north Kampung Code settlement. Testing using the test statistic based from the answer of the respondents to the questionnaire. Quantitatively, the study was determined using output rating statistics. Then the hypothesis testing was done through a linear regression analysis which serves to identity that effect. Test conducted on the variable of characteristics design of Mangunwijaya consists of united with nature, local, efficient, honest, detail and creative. The conclusions is a significant effect the characteristics design of YB. Mangunwijay on the visual character of the north Kampung Code was shown in this work.Correlation between respondents answer with theory explanation. Interpretation of this research was not every factor in forming the visual character can be understood properly by the observer. Key words: Visual Character, Characteristics Effect, The North Kampung Code, YB. Mangunwijaya Diponegoro University 2013-10-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/5634 TEKNIK; Volume 34, Nomor 2, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67680 2025-07-07T19:30:43Z teknik:ART

"250331 2025 eng " 2460-9919 0852-1697 dc Gewangga, Arya Bakti Department of Civil Engineering, Universitas Diponegoro, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275|Universitas Diponegoro Sadono, Kresno Wikan The Manikin Dam, located in Taebenu District, Kupang Regency, East Nusa Tenggara Province, is currently under construction. The dam is designed with an asphalt concrete core. The initial foundation elevation of the Manikin Dam was set at 103 meters above sea level due to fluctuating NSPT values. Consequently, the Dam Safety Commission recommended lowering the foundation elevation to 98 meters above sea level. This study aims to analyze the relationship between vertical deformation and stability in the Manikin Dam design at different foundation elevations. The modeling was conducted using Plaxis 2D V22, simulating asphalt concrete with two material models: Mohr-coulomb and hardening soil.The analysis results indicate that as the embankment height increases at different foundation elevations, the safety factor decreases while vertical deformation increases. At the final stage of embankment construction, the vertical deformation of the Manikin Dam at a foundation elevation of 103 meters for the mohr-coulomb core material model is 35.12 cm with a safety factor of 1.723, whereas, for The hardening soil core material model, it is 35.74 cm with a safety factor of 1.720. At a foundation elevation of 98 meters, the vertical deformation is 35.81 cm for the mohr-coulomb core material model with a safety factor of 1.715 and 36.69 cm for The hardening soil core material model with a safety factor 1.724. The safety factor and vertical deformation values for the dam core using both the mohr-coulomb and hardening soil material models remain within permissible limits. Diponegoro University 2025-03-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67680 TEKNIK; Vol 46, No 2 (2025) April 2025 ind Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/22829 2020-04-17T09:38:55Z teknik:ART

"190531 2019 eng " 2460-9919 0852-1697 dc Software Development of Environmental Friendly RFID - Based Automatic Toll Gate with Paperless Payment Notification Syafei, Wahyul Amien Department of Electrical Engineering, Diponegoro University https://scholar.google.co.id/citations?user=d9-akvEAAAAJ&hl=en Listyono, A. F. Prayogi, A. S. Darjat, Darjat Hidayatno, Achmad environmental friendly; toll gate; RFID; SMS; payment notification Penelitian ini bertujuan untuk mengembangkan purwarupa sistem gardu tol yang ramah lingkungan. Sistem ini menggunakan teknologi RFID untuk mengidentifikasi pengguna sebagai pengganti kartu debit. Kendaraan diidentifikasi oleh sistem ketika melewati gardu tol. Pembayaran dilakukan tanpa perlu memberhentikan kendaraan. Notifikasi pembayaran dikirim melalui SMS secara otomatis oleh sistem ke telepon genggam pengguna. Purwarupa ini dirancang untuk mengeliminasi antrean dan sampah kertas di gardu tol sehingga menghemat waktu, bahan bakar, biaya penyediaan kertas dan tinta. Paper ini menyajikan pengembangan perangkat lunak dari sistem gardu tol otomatis ramah lingkungan yang diusulkan. Diponegoro University 2019-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/22829 TEKNIK; Vol 40, No. 1 (2019): Mei 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1913 2012-02-24T11:23:19Z teknik:ART

2460-9919 0852-1697 dc KAJIAN STABILITAS TUMPUKAN BATU DALAM AIR Samto Atmojo, Pranoto Velocity of Water (Va), Stone Critical Velocity (Ucr) Rock fill Dam, Coffer Dam, Groyne, Railway are example of structures composed by stone material. Rockfill structures are commonly stable enough, but when that’s constructed in under water, than stability ofstructure will decrease significant. Stability of stone structure under water actually depend on by somevariable these are depth of flooding, size or dimension, and stone position. The Author here will show withRail way stabilities calculation for example. Trial by two level position of flooding ,assume diameter stoneand gated value of properties , the result is stone with diameter 12 cm, will scour by less than 20 cm underwater. The Stone will scours by the flowing water if the velocity of water (Va) bigger than Critical velocityof the stone (Ucr). At the reality, rail way structured by stone with variation size more or less from 5 to 12cm, and depth of flooding possible occur more than 20 cm. So, rail way potential hanging cause of stonesupporting scour by flooding however only 10 cm depth. Calculation of stone stabilities used after Isbash,Goncharov,Levi dan Maynord formulae. Diponegoro University 2012-02-10 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1913 TEKNIK; Volume 29, Nomor 1, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/46438 2025-07-07T19:35:10Z teknik:EI

"220531 2022 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Perbaikan atas naskah: TEKNIK  (2021). Front Matter. TEKNIK, 42(3), i-v. Retrieved from https://ejournal.undip.ac.id/index.php/teknik/article/view/43388 Diponegoro University 2022-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/46438 TEKNIK; Vol. 43, No. 1 (2022): May 2022 ind Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/24473 2020-04-17T09:40:00Z teknik:ART

"191231 2019 eng " 2460-9919 0852-1697 dc Iqbal, Muhammad Departemen Teknik Perkapalan, Fakultas Teknik, Universitas Diponegoro https://www.scopus.com/authid/detail.uri?authorId=56739963100 Zakki, Ahmad Fauzan Shofly, Muhammad Fuad Menurunkan gerakan rolling kapal merupakan hal penting untuk meningkatkan keamanan dan kemudahan kapal dalam beroperasi. Salah satu cara meminimalisir rolling pada kapal adalah menambahkan sistem anti-rolling. Pada penelitian ini, dilakukan analisis Koefisien Damping anti-roll jenis passive tank dengan pengaturan tinggi fluida di dalam tangki jenis U – Tube. Pemodelan dilakukan dengan menggunakan software berbasis CAD dan CFD kemudian dilakukan analisis perhitungan momen peredam untuk mendapatkan nilai Koefisien Damping. Hasilnya digunakan untuk  peredam tambahan pada analisis gerakan rolling kapal. Hasil analisa menunjukkan bahwa ketinggian fluida passive tank jenis U – Tube pada 3,52 m memberikan nilai Koefisien Damping terbesar dengan nilai 2.018.620 N.m/(deg/s). Model ini adalah yang terbaik ditinjau dari respon momen redaman yang dihasilkan untuk meminimalisir gerakan rolling kapal. Diponegoro University 2019-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/24473 TEKNIK; Vol 40, No. 3 (2019): Desember 2019 ind Copyright (c) 2019 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1965 2012-02-24T11:16:25Z teknik:ART

2460-9919 0852-1697 dc THE ANALYSIS OF PARTIAL DISCHARGE (PD) FROM ELECTRICAL TREEING IN LINEAR LOW DENSITY POLYETHYLENE (LLDPE) AND HIGH DENSITY POLYETHYLENE (HDPE) Hermawan, Hermawan Syakur, Abdul Partial Discharge, LLDPE, HDPE. Recently, the transmission of electric energy has been developed by insulated cable. The suitable materialas an insulated cable is LLDPE and HDPE. In order to understand the quality of insulation system, themeasuring of PD has done. PD could begin completely insulation failure (breakdown). Therefore, it is veryimportant to understand the characteristic of PD and the enclose event on it, because PD is a main factorwhich caused insulation failure.This paper presents the result of PD measurement in the laboratory that used needle-plane electrode. Itwas supported by equipments such as osiloskop Digital GDS 2104 GW Instek, HPF, and RC detector.Polymer sample that used in this research is LLDPE (Linier Low Density Polyethylene) and HDPE with 20x 4 x 25 mm3 dimension in each. Needle was made by steel (length 50 mm and diameter 1.15 mm), it wasstick to the polymer material. The distance between needle to the plane is 5 mm. The applied voltage foreach sample was 16 kVrms, 18 kVrms, 20 kVrms and 22 kVrms. The Taking of PD data was done in thefirst minute, 10th minute, 20th and so on until 180th minute.The measurement result shows that the characteristic of PD number and maximum charge as a function oftime and as a function of applied voltage inclined increasing both on LLDPE and HDPE. But, PD intensityin HDPE is higher than LLDPE. Diponegoro University 2012-02-02 14:39:24 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1965 TEKNIK; Volume 29, Nomor 3, Tahun 2008 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/51582 2023-01-24T23:37:53Z teknik:EI

"221230 2022 eng " 2460-9919 0852-1697 dc TEKNIK, Editor in Chief Artikel editorial ini berisi back-matter TEKNIK Volume 43 Nomor 3 Tahun 2022 yang memuat petunjuk penulisan dan pengiriman artikel TEKNIK. Diponegoro University 2022-12-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/51582 TEKNIK; Vol. 43, No. 3 (2022): December 2022 ind Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/53301 2023-10-12T21:21:38Z teknik:ART

"230830 2023 eng " 2460-9919 0852-1697 dc Improving the Concentration Accuracy of Fertilizer Application in Hydroponic System Using PLC Sadiyoko, Ali Department of Electrical Engineering (Mechatronics), Universitas Katolik Parahyangan https://orcid.org/0000-0003-0867-1389 Perdana, Kevin Adi Department of Electrical Engineering (Mechatronics), Universitas Katolik Parahyangan Naa, Christian Fredy Department of Electrical Engineering (Mechatronics), Universitas Katolik Parahyangan Electroconductivity (EC); hydroponic; fertilisation ; NFT ; PLC; TDS Hidroponik adalah sebuah metode bercocok tanam dengan menggunakan air sebagai media untuk menyimpan nutrisi (pupuk/ zat hara) yang dibutuhkan oleh tanaman. Oleh sebab itu, konsentrasi pupuk terlarut di dalam air sangat menentukan bagi pertumbuhan tanaman. Metode pengukuran pupuk terlarut di sistem hidroponik biasa dilakukan dengan mengukur nilai Electrical Conductivity (EC) dan Total Dissolved Solids (TDS) larutan. Namun, karena proses pengukuran EC dan TDS yang tidak dilakukan terus menerus, maka hal ini dapat mengakibatkan pertumbuhan tanaman menjadi terganggu. Pada penelitian ini, dirancang sebuah sistem kontrol konsentrasi pupuk otomatis berdasar atas nilai EC yang dapat dimonitor terus menerus. Proses kontrol konsentrasi pupuk akan dilakukan secara otomatis dengan menggunakan Programmable Logic Controller (PLC), yang dilengkapi dengan sensor TDS  dan beberapa pompa. Pengukuran nilai EC dilakukan secara tidak langsung dengan menggunakan sebuah sensor TDS. Pengujian sistem rancangan dilakukan selama 8 hari, dimana selama masa tersebut, rancangan sistem kontrol konsentrasi pupuk otomatis ini berhasil menjaga nilai EC di antara 0,844 mS/cm hingga 1,051 mS/cm. Nilai EC standar yang diperlukan oleh tanaman selada adalah 0,8 mS/cm ~ 1,2 mS/cm.  Hal ini menunjukkan bahwa sistem ini lebih akurat dari sistem yang menjadi referensi, yang mampu menjaga nilai EC di nilai antara 0,8 mS/cm hingga 1,2 mS/cm. Diponegoro University 2023-08-30 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/53301 TEKNIK; Vol. 44, No. 2 (2023): August 2023 ind https://ejournal.undip.ac.id/index.php/teknik/article/download/53301/171089 Copyright (c) 2023 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/1734 2012-02-10T06:29:29Z teknik:ART

2460-9919 0852-1697 dc OPTIMALISASI EKSTRAKSI DAN UJI STABILITAS PHYCOCYANIN DARI MIKROALGA Spirulina platensis Jos, Bakti Eko Setyawan, Prayudi Satria, Yudha Liquid-liquid extraction; Phycocyanin; Spirulina The growing awareness of the importance of natural colours especially food and cosmetic colorants has placedgreat demand on biological sources of natural colours. It is for this reason that the phycobiliproteins inSpirulina platensis is gaining increasing attention as an alternative colour for these products. Numerousscientific reports confirm the fact that Phycocyanin from Spirulina platensis, is not only an effective naturalblue colorant, but also a compound that is beneficial to the health of the consumer. The aim of this research is toconduct evaluation studies phycocyanin production by extraction with polar solvents at various concentrationsto obtain extracts for maximum yield. The methods in this study has several stages, namely preparation ofmaterials, extraction, solubility studies of phycocyanin, phycocyanin’s stability test. Changing variables in thisstudy are water, acetic acid 70%, 75%, 80%, ammonium sulphate 50%, 55%, 60%. The analysis of the extractsof phycocyanin’s content using spectrophotometric methods. The observations produces a blue pigment whichhas the highest color intensity with maximum absorbance of 620 nm. Acetic acid 80% is the most effectivesolvent to extract the blue pigment phycocyanin than water and ammonium sulfate. Extraction is influenced bythe pH of the increase in absorption (absorbance) with increasing pH and was not influenced by storagetemperature and time Diponegoro University 2012-02-02 14:47:46 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1734 TEKNIK; Volume 32, Nomor 3, Tahun 2011 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/25950 2020-10-05T05:05:47Z teknik:ART

"200831 2020 eng " 2460-9919 0852-1697 dc Pengaruh Proses Normalising dan Tempering Ganda Terhadap Peningkatan Nilai Modulus of Toughness Baja AISI 4340 Bandanadjaja, Beny Politeknik Manufaktur Bandung Idamayanti, Dewi Politeknik Manufaktur Bandung baja AISI 4340; perlakuan panas; normalising; tempering dua tahap; ketangguhan Baja AISI 4340 merupakan baja paduan Nikel, Chrom dan Molibden. Baja ini memiliki sifat kemampuan untuk dilaku-panas (heat-treatable) yang baik. Penelitian ini ditujukan untuk meningkatkan ketangguhan baja AISI 4340 melalui proses perlakuan panas. Metode percobaan dilakukan dengan memberikan variasi proses perlakuan panas pada baja AISI 4340. Proses perlakuan panas yang diberikan yaitu normalising pada temperatur 900 °C, tempering tahap pertama pada temperatur 650 °C dan tempering tahap kedua dengan variasi 650 °C dan 705 °C. Pengaruh pemberian tambahan proses tempering setelah normalising dan temperatur temperingnya dianalisis untuk diketahui sejauh mana dapat meningkatkan ketangguhan baja ini. Hasilnya menunjukkan bahwa pemberian tambahan proses tempering dua kali pada 650 °C setelah normalising pada temperatur 900 °C dapat meningkatkan elongasi baja AISI 4340. Ketangguhan sebagai salah satu sifat mekanik yang akan ditingkatkan merupakan nilai kombinasi kekuatan tarik, kuat luluh dan elongasi, dalam nilai modulus of toughness. Hasil perhitungan modulus of toughness yang terbaik diperoleh dari proses perlakuan panas normalising, kemudian tempering tahap I pada temperatur 650 °C dan tempering tahap II pada temperatur 650 °C, yaitu sebesar 1.206 kgf.mm/mm3, meningkat 450 % dibandingkan dengan kondisi as-cast tanpa proses perlakuan panas sebesar 267 kgf.mm/mm3. Diponegoro University 2020-08-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/25950 TEKNIK; Vol 41, No. 2 (2020): August 2020 ind Copyright (c) 2020 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/2144 2012-02-24T03:02:36Z teknik:ART

2460-9919 0852-1697 dc APLIKASI FIS MODEL SUGENO PADA PENGENDALIAN VALVE UNTUK MANGATUR TINGGI LEVEL AIR Wahyudi, Wahyudi Setiawan, Iwan Nainggolan, Martina liquid level, valve, Fuzzy control, and ATmega8535 Fuzzy control is one of the controller alternative using expert system ( human being logic) as controller sothat do not need knowledge concerning parameter of systems. Fuzzy control also have ability of lightcomputing. This paper goal is making a Fuzzy control and observe the response of the plant had beencontrolled. The experiment’s purpose is to show the performance of Fuzzy control in control valve systemin order to liquid level controlling on-linely. Water level controlled by opening the load valve in the holdtank. The project experiment’s include examination conduct logic of Fuzzy program of Codevision AVR,examination of system at some references, examination the changing of liquid level reference, andexamination of system with the influence of disturbance. From the test, it is known that Fuzzy control withAVR ATmega8535 can yield eliminate offset in arranging opening of valve. Offset in examination ofsystem at some references are 0,4 cm , 0,02 cm , 0,17 cm, 0,11 cm, and 0,54 cm. Offset in examination thechanging of liquid levels are 0,07 cm, 0,02 cm, and 0,04 cm. Diponegoro University 2012-02-10 11:25:01 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/2144 TEKNIK; Volume 28, Nomor 2, Tahun 2007 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/59938 2025-04-24T18:11:04Z teknik:ART

"240613 2024 eng " 2460-9919 0852-1697 dc Aliputa, Henu Satya Departemen Teknik Sipil, Department of Civil Engineering, Universitas Diponegoro Sukamta, Sukamta Nugroho, Hari Penelitian ini bertujuan untuk membuat metode pemasangan instrumen keamanan Bendungan Lausimeme sesuai gambar kerja (shopdrawing) dan keadaan di lapangan. Hasil penelitian menunjukkan terdapat 16 Piezometer Vibrating Wire (PVW), 4 Inklinometer, 4 Multilayer Settlement, dan 8 Open Standpipe Piezometer dipasang dengan pengeboran. Total kedalaman pengeboran untuk pemasangan instrumen adalah 438,92 m. Sebanyak 42 PVW, 9 Crest Settlement Survey Point, dan 21 Surface Settlement Survey Point dipasang bersamaan tubuh bendungan. Sebanyak 1 Seepage Measuring Device, 1 Seismograf dan 1 Observation Well dipasang diluar tubuh bendungan. Tahapan umum pemasangan dengan pengeboran dimulai dengan persiapan instrumen, marking titik pengeboran, pengeboran, pemasangan instrumen, pembacaan instrumen, pengisian lubang bor, dan penempatan pipa/kabel. Pemasangan instrumen bersamaan dengan tubuh bendungan dimulai dengan persiapan instrumen, marking titik, pemasangan instrumen, dan pembacaan instrumen. Instrumen observation well yang dipasang diluar tubuh bendungan memiliki tahap yang sama seperti pisometer pipa terbuka. Seepage measuring device dan seismograf memiliki tahap pekerjaan yang bervariasi. Sumber daya utama yang diperlukan untuk pengeboran adalah tim pengeboran, material pengisi lubang bor, dan 1 set alat bor kering. Sumber daya utama untuk pemasangan bersamaan dengan tubuh bendungan adalah waterpass dan handtamper. Kontraktor harus menyiapkan sumberdaya yang dibutuhkan 1 bulan sebelum pekerjaan dimulai. Diponegoro University 2024-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/59938 TEKNIK; Vol. 45, No. 1 (2024): May 2024 ind Copyright (c) 2024 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/15406 2020-04-17T09:34:05Z teknik:ART

"170701 2017 eng " 2460-9919 0852-1697 dc Risk Assessment of Total Coliform in X WTP’s Water Production Using Failure Mode And Effect Analysis Method Amanda, Bella Apriliani Department of Environmental Engineering Institut Teknologi Sepuluh Nopember Moesriati, Atiek Karnaningroem, Nieke FMEA, risk assessment, IPA Kedunguling, quality water production, RPN The greatest risk of drinking water supply is a failure to provide safe drinking water for communities. Based on IPA Kedunguling testing report on March 2016 noted that sample exceeding the quality standart of Peraturan Menteri Kesehatan RI No 492/2010 for the total coliform quality standart. The presence of total coliforms indicating water contamination by pathogen means the water is not safe to consume. The disinfection process has an importance rule in pathogen inactivation. Disinfectant performance is influenced by temperature, pH, turbidity, and the presence of organic materials. One way to control the quality of water produced by using a risk management approach Failure Modes and Effect Analysis (FMEA) methods. The potential risks should be measured to determine causes of the problems and find the appropriate risk reduction. The risk assessment is using Risk Priority Number (RPN) scale as a basis prioritization of remedial action on issues. Based on identification and risk analysis using FMEA known that the greatest risk of failure is the stipulation of chlorine dose and organic substances (category of high risk level); residual chlorine (category of moderate risk level); turbidity and pH (very low risk level category). Improvement proposal that can be done to reduce total coliforms presence in IPA Kedunguling is by increasing residual chlorine to 0.6 mg/l, set a daily chlorine level, controlling DBPs forming by lowering the concentration of organic precursor using granular activated carbon (GAC) or aeration, by lowering the dose of disinfectant, set aside DBPs after the compound is formed using granular activated carbon (GAC), turbidity and pH monitoring, and regularly washing the filters Diponegoro University 2017-07-01 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/15406 TEKNIK; Vol 38, No 1 (2017): (Juli 2017) eng Copyright (c) 2017 Teknik

oai:ojs.ejournal.undip.ac.id:article/1771 2012-02-10T07:57:25Z teknik:ART

2460-9919 0852-1697 dc KONVERSI ELEKTROKIMIA AMONIA MENJADI HIDROGEN Ratnawati, Ratnawati Sumarno, Sumarno Nugroho, Amin ammonia, elektrolisis, hydrogen One of the most dangerous pollutants in wastewater is ammonia. The concentration of ammonia inwastewater discharged from nitrogen fertilizer industry is up to 1500 ppm. Ammonia can be removed byseveral methods such as biological denitrification, air-stripping, and ion exchange. The methods cannotreduce the concentration of ammonia to a low level as required for standard quality of wastewater. Theelectrochemical method has recently attracted attention for the treatment of wastewater containing ammonia.This research is aimed to evaluate the effect of ammonia concentration, current density, and time on theelectrolysis process. Synthetic wastewater containing 500-1500 ppm of ammonia was used in this research.The solution was electrolyzed in a electrolytic cell with Pt/SS electrodes. The experiment was conducted byvarying current density in the range of 5 – 10 mA/cm2 and time from 0 to 105 minutes. The experiment resultsshow that as current density rises, the electrolytic reaction occurs more rapidly. On the other hand, initialconcentration of ammonia has negative effect on the final conversion of ammonia. Diponegoro University 2012-02-02 14:46:02 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1771 TEKNIK; Volume 31, Nomor 2, Tahun 2010 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/36978 2021-08-29T17:46:58Z teknik:ART

"210826 2021 eng " 2460-9919 0852-1697 dc Lestari, Franciska P. Saputra, Brama A. Erryani, Aprilia Mulyati, Inti Dwijaya, Made Subekti Kartika, Ika Paduan logam berpori berbasis magnesium sangat potensial dalam aplikasi prostesis biomedis. Kalsium, seng dan agen pengembang ditambahkan untuk melengkapi fungsi dan aplikasi paduan. Dalam studi ini, paduan logam berpori Mg-Ca-Zn dikembangkan dengan proses metalurgi serbuk menggunakan dolomit (CaMg(CO3)2) sebagai agen pengembang untuk menghasilkan pori jenis tertutup. Variasi ukuran agen pengembang dan temperatur sintering dilakukan dengan tujuan untuk mencapai ukuran, persentasi dan kehomogenan pori yang terbentuk dalam paduan, dimana pori berfungsi untuk pertumbuhan tulang baru. Komposisi (%berat) paduan yang dikembangkan adalah 84,5Mg-0,5Ca-5Zn-10CaMg(CO3)2, dengan variasi temperatur sintering T = 650, 675, dan 700°C dan waktu tahan 5 jam, sedangkan ukuran dolomit CaMg(CO3)2 divariasikan -30 #, -50 #, -80 #. Paduan hasil sintering diuji XRD (x-ray diffraction) untuk menganalisis fasa yang terbentuk. Ukuran dan kehomogenan pori hasil sintering diamati dengan SEM (scanning electron microscopy), dan persentasi pori yang terbentuk diukur dengan menggunakan metode Archimedes sesuai standar ASTM B311-93. Sifat mekanik dari paduan hasil sintering diuji dengan alat uji kompresi mengacu pada standar ASTM D-695-02. Analisis XRD (x-ray diffraction) dalam paduan 84,5Mg-0,5Ca-5Zn-10CaMg(CO3)2hasil sintering terbentuk fasa Mg sebagai matriks, MgO, CaCO3 dan dolomit (CaMg(CO3)2). Persentasi porositas tertinggi diperoleh sebesar 32,60% dengan ukuran pori terbesar adalah ≤300 μm dan kekuatan tekan 143 MPa. Kondisi ini dihasilkan dalam paduan dengan ukuran partikel dolomit -30# dan temperatur sintering 700°C. Teknologi metalurgi serbuk dengan variasi temperatur sintering dan variasi ukuran agen pengembang dolomit berpengaruh signifikan terhadap ukuran, persentasi, dan kehomogenan pori serta sifat mekanik yang dihasilkan dalam paduan 84,5Mg-0,5Ca-5Zn. Diponegoro University 2021-08-26 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/36978 TEKNIK; Vol. 42, No. 2 (2021): August 2021 ind Copyright (c) 2021 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/4817 2013-05-06T03:45:05Z teknik:ART

"130402 2013 eng " 2460-9919 0852-1697 dc METODE PENENTUAN VOLUME AGGREGAT PONDASI JALAN BERDASARKAN VARIASI DAN KESALAHAN: STUDI KASUS Simamora, Marsinta Dwi Hatmoko, Jati Utomo Array Variations between plans and reality can hardly be avoided in construction projects. These variations may be accepted when they are still in the acceptance limits, or rejected when they are beyond the acceptance limits. The former is called variation in acceptance and the later is called error. Distinguishing these two in a completed construction work is very important, as rejected variations (errors) may be considered as breaching a contract, thus may have legal implications. The research aims to evaluate the traditional calculation method (MeTrad) and to promote variation acceptance and error approach (MeVE) that is able to draw a clear line whether a particular work to be accepted and rejected. The research was conducted by comparing the results of calculation of the aggregate volume between MeTrad and MeVE. The data was collected from Mauponggo- Puuwada road project in Nangakeo in 2010. The results show that there was no difference in the volumes calculated using both methods. The volume of Class B aggregate based on MeTrad calculation is 386.01m 3and the volume based on MeVE is 386.01m3; where 16.67m3 of which (3.34% of the planned volume) is in the range of acceptance and 369.34m3 of which (73.94% of the planned volume)is the volume that is rejected (error). The results suggest that MeTrad cannot distinguish clearly whether the work is within the limits of acceptance or rejection, while on the other hand MeVE can describe in detail parts of the work to be accepted or rejected. Using this MeVE calculation, an assessment of a construction workis expected to be more objective and detailed. Diponegoro University 2012-08-08 13:06:31 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/4817 TEKNIK; Volume 34, Nomor 1, Tahun 2013 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/67926 2025-07-07T19:30:43Z teknik:ART

"250331 2025 eng " 2460-9919 0852-1697 dc Slope Stability Analysis with Bore Piles for Landslide Prevention Using Plaxis LE 2D Inabah, Redha Fatki Department of Civil Engineering, Faculty of Engineering, Diponegoro Universitas , Tembalang, 50275, Semarang, Central Java, Indonesia Sukamta, Sukamta Department of Civil Engineering, Faculty of Engineering, Diponegoro Universitas , Tembalang, 50275, Semarang, Central Java, Indonesia Slope Stability; Plaxis LE 2D; Bore Pile; Clay Shale; Broms The Rukoh Diversion Channel is an integral part of the Rukoh Dam, with the purpose of providing additional supply (supplement) to the Rukoh Dam reservoir of 15 m³/second. One of the components of the Rukoh Control Structure is a tunnel. The soil at the location of the Rukoh Diversion Channel tunnel consists of clay shale. Clay shale soil is a primary factor that causes landslides. Clay shale is a part of sedimentary rock, where this type of soil can undergo weathering in a short period when exposed to water, air, and sunlight. Several landslides have occurred at the inlet of the tunnel. Construction activities such as excavation and embankment can expose the soil, which may lead to a reduction in the shear angle of that soil. Landslide events at the inlet of the tunnel require management through soil reinforcement with bore piles using Plaxis LE 2D. This study aims to analyze the stability conditions of the slope in its existing state and with the reinforcement provided by bore piles. The factor of safety for the existing slope condition is 1.440, which is categorized as less than the required safety factor. The bore piles are planned to be 0.6 m wide and 8 m long. The bearing capacity analysis for the bore piles is 16147.21 kN, with the allowable lateral force provided by the bore piles using broms method being 54.348 kN. After the installation of the bore piles, the factor of safety for the slope is 1.868, which meets the minimum required threshold of 1.5. Diponegoro University 2025-03-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/67926 TEKNIK; Vol 46, No 2 (2025) April 2025 eng Copyright (c) 2025 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/15783 2020-04-17T09:36:48Z teknik:ART

"181231 2018 eng " 2460-9919 0852-1697 dc An Analysis of Rolling Damage Ship Motion Caused by the Wave Load on Bulk Carrier Vessels Putranto, Teguh Department of Marine Engineering, Faculty of Marine Technology, Institut Teknologi Sepuluh Nopember http://orcid.org/0000-0003-2526-1963 Purwanto, Dedi Budi Department of Marine Engineering, Faculty of Marine Technology, Institut Teknologi Sepuluh Nopember bulk carrier; rolling; panel method; wave; flooding The stability is a key requirement for the ship to sail safely. This article presents an analysis of rolling movements on bulk carrier vessels that have leaked when subjected to wave loads with heading angles of 90⁰ and 270⁰ and maximum wave height. The ship is in full load condition when the simulation and analysis is carried out with a scenario of leakage in the cargo chamber. Because the vessel with compartment leakage has trim and shaky conditions, the results of the rolling motion show differences in each direction the waves come. The 3D diffraction panel method is used to get the rolling motion of the ship as a function of time. The results of the study without sloshing effects showed that the bulk carrier had the risk of sinking if there were leaks in the two cargo chambers. Diponegoro University 2018-12-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/15783 TEKNIK; Vol 39, No. 2 (2018): Desember 2018 eng Copyright (c) 2019 Teknik

oai:ojs.ejournal.undip.ac.id:article/1893 2012-02-24T10:20:44Z teknik:ART

2460-9919 0852-1697 dc PENGARUH PENGGUNAAN SERAT KULIT ROTAN SEBAGAI PENGUAT PADA KOMPOSIT POLIMER DENGAN MATRIKS POLYESTER YUKALAC 157 TERHADAP KEKUATAN TARIK DAN DAN TEKUK Jokosisworo, Sarjito rattan bark fibre, woven roving, tensile strength, elasticity modulus, bending. This time, rattan bark fiber’s used in furniture industries and home industries because it is easy to get, cheap,not to be danger for our health, and it can lesson environment pollution (biodegradability); so, with exploit ascomposites lasing fibre, later, it can overcome the environment problem. The rattan bark development ascomposite material has already know, in view of the raw material of natural fibre (rattan) available, Indonesiahas many raw material. From this case, this research conducted to get technical analysis of tensile strength andbending from rattan bark fibre composite that is using woven roving treatment of variation matting pattern onfibre direction 0º/90º and 45º angles as polyester resin matrix.The purpose of this research is: to identify the tensile strength and bending of composite of rattan bark fibrewhich influence fibre direction between 0º/90º and 45º angles. From the result of specimen trial is served intensile strength and bending, and compared with tensile strength and bending value which permitted by BKI (Biro Klasifikasi Indonesia) as theory of standardization trial. On the research, the writer found composite thathave rattan bark fibre compared 0º/90º and 45º angle of fibre direction, the treatment of matting pattern fibre,volume fraction 42,8% matrix polyester and 57,2% rattan bark fibre to specimen of tensile strength trial,volume fraction 50% matrix polyester and 50% rattan bark fibre to specimen bending trials. Conducted handlay up method, from the result study found the price maximum of tensile strength has got by composite with0º/90º and 45º fibre direction and maximum bending has got by composite with 45º fibre direction. Diponegoro University 2012-02-15 10:08:51 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/1893 TEKNIK; Volume 30, Nomor 3, Tahun 2009 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/41681 2025-07-07T19:35:10Z teknik:ART

"220531 2022 eng " 2460-9919 0852-1697 dc Performance analysis of State-Estimator Implementation on Hardware-In-The-Loop of Ball and Beam System Romdlony, Muhammad Zakiyullah Fakultas Teknik Elektro, Universitas Telkom Irsyadi, Fakih Sekolah Vokasi, Universitas Gadjah Mada Rahmawati, Dien Fakultas Teknik Elektro, Universitas Telkom Kristiawan, Handika Yulma Fakultas Teknik Elektro, Universitas Telkom ball and beam; state estimator; full state feedback control; hardware in the loop; position control Ball and Beam System (BBS) merupakan model kendalian yang seringkali digunakan untuk memodelkan berbagai sistem dinamis yang kompleks dan unstable. BBS merupakan underactuated system dimana sistem kompleks untuk dikendalikan sehingga ideal untuk penerapan berbagai jenis kendali, mulai dari kendali klasik, modern maupun cerdas. Mayoritas perancangan sistem kendali dilakukan secara simulasi. Metode ini kurang realistis karena dilakukan pada kondisi yang ideal sehingga hasilnya tidak dapat diimplementasikan secara langsung pada sistem riil. Salah satu metode lain yang dapat digunakan adalah simulasi Hardware in the loop (HIL). Penggunaan perangakat pengendali memungkinkan hasil perancangan dapat secara langsung digunakan untuk mengendalikan sistem riil. Paper ini mengusulkan perancangan kendali full state feedback untuk stabilisasi BBS menggunakan setup HIL simulator. Pengembangan yang dilakukan adalah penambahan state estimator, yang ditanamkan pada perangkat pengendali, untuk mengestimasi nilai posisi dan kecepatan bola sebagai masukan pengendali. Hasil pengujian menunjukkan bahwa perancangan state estimator pada simulasi HIL berhasil dilakukan. State estimator dapat mengestimasi output posisi BBS dengan waktu konvergensi yang cepat, sekitar 1,32 detik. Performansi yang dihasilkan sistem serupa dengan simulasi maupun implementasi sistem riil. Hal ini menunjukkan bahwa sistem yang diusulkan dapat merepresentasikan dinamika sistem pada full state feedback control. Diponegoro University 2022-05-31 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/41681 TEKNIK; Vol. 43, No. 1 (2022): May 2022 ind Copyright (c) 2022 TEKNIK

oai:ojs.ejournal.undip.ac.id:article/7028 2014-12-24T02:00:43Z teknik:ART

"141010 2014 eng " 2460-9919 0852-1697 dc OPTIMASI VARIABEL YANG PALING BERPENGARUH PADA PEMBUATAN BIODIESEL DARI MINYAK BIJI RANDU DENGAN PROSES TRANSESTERIFIKASI Sofyan, Mudzofar Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, 50275 Tanjung, Ilham Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, 50275 Santosa, Herry Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, 50275 Array [Title: Biodiesel Production from Kapok Seed Oil with KOH Catalyst Using Two Steps Transesterification Process] Biodiesel is one of diesel fuel alternative made from renewable resources such as vegetable oils and animal fats. One of the natural ingredients that can be used as a material in the production of biodiesel is kapok seed. The existence of relatively abundant raw materials is a great opportunity to be developed into alternative energy options which developed on a commercial scale. Biodiesel from kapok seed oil can be made through a two-stage transesterification reaction which helped by using a base catalyst. This research aims to characterize the kapok seed oil, determine the most influential variables between temperature, the ratio of methanol-oil, and time against yield by the factorial design method, optimization variables that most influence on yield, and characterize the biodiesel. Two-stage transesterification process using KOH as the catalyst with changing variables: temperature, methanol-oil ratio, and time. The result showed that kapok seed oil has FFA content: 17.97% and a saponification number: 172.55 mgKOH/g. Most influential variable is the variable of time. At the variable optimization of time, the result were optimally obtained at the 105th minutes with yield: 77.39%. The characterization results of biodiesel’s product show from seven parameters of testing, four parameters are required in accordance with SNI. Diponegoro University 2014-10-20 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/7028 TEKNIK; Vol 35, No 1 (2014): (July 2014) eng https://ejournal.undip.ac.id/index.php/teknik/article/download/7028/15017 Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/73603 2025-11-17T01:02:24Z teknik:ART

"251117 2025 eng " 2460-9919 0852-1697 dc Mapping the Relationship Between Enterprise Risk and Project Risks at Construction Company Nurdiana, Asri Department of Civil Engineering, Faculty of Engineering, Diponegoro University, Jl. Prof. Soedarto, SH, Kampus UNDIP Tembalang, Semarang, 50275 https://orcid.org/0000-0002-8671-1529 Wibowo, Mochammad Agung Department of Civil Engineering, Faculty of Engineering, Diponegoro University, Jl. Prof. Soedarto, SH, Kampus UNDIP Tembalang, Semarang, 50275 https://orcid.org/0000-0002-5434-9107 Hatmoko, Jati Utomo Dwi Department of Civil Engineering, Faculty of Engineering, Diponegoro University, Jl. Prof. Soedarto, SH, Kampus UNDIP Tembalang, Semarang, 50275 https://orcid.org/0000-0002-0795-4531 enterprise risk management; project risk management; construction company; risk management The construction industry is described as a project-based industry that inherently carries a wide range of risks. These risks are not only limited to projects but also extend to organizational or enterprise-level risks involving the company's directors, departments, and divisions. This study aims to examine the relationship between construction project risks and enterprise risks within construction companies. Specifically, it investigates how risks originating at the project level may influence or correlate with broader organizational risks, and vice versa. The research method involves analyzing secondary data, including project risk management reports and enterprise risk management documentation from construction firms. Through qualitative analysis, this study found a significant reciprocal relationship between project-level risks and company-level risks, which include the financial nature of the project risks, strategic risks, operational risks, and public & legal risks. These findings suggest that effective integration of project risk management (PRM) and enterprise risk management (ERM) is essential for enhancing overall risk resilience and organizational performance in the construction sector. Diponegoro University 2025-11-17 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/teknik/article/view/73603 TEKNIK; Vol 46, No 3 (2025): Juli 2025 eng Copyright (c) 2025 TEKNIK 29914131cf66e48986dcabad51022807