2026-04-04T08:52:26Z https://ejournal.undip.ac.id/index.php/index/oai

oai:ojs.ejournal.undip.ac.id:article/30626 2020-06-08T16:08:16Z berkala_fisika:EDT

nmb a2200000Iu 4500 "200430 2020 eng " 1410-9662 dc SENI MEYIAPKAN GAMBAR UNTUK PUBLIKASI IMLIAH Anam, Choirul Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang SENI MEYIAPKAN GAMBAR UNTUK PUBLIKASI IMLIAH BERKALA FISIKA 2020-06-08 15:31:49 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/30626 BERKALA FISIKA; Vol 23, No 2 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5000 2013-05-27T15:52:56Z berkala_fisika:RA

nmb a2200000Iu 4500 "130101 2013 eng " 1410-9662 dc KOMPUTERISASI TABEL SIFAT-SIFAT TERMODINAMIK DARI H2O, R-12, DAN R-22 (PROTAMIK) Khuriati RS, Ainie Department of Physics, Universitas Diponegoro Semarang Detika, Detika Department of Physics, Universitas Diponegoro Semarang Bawono P, Ari Department of Physics, Universitas Diponegoro Semarang A computer program has been created which is used to display the thermodynamic properties (T, p, v, u, h, and s) of the working fluid of the commonly used on the power generation and processindustries,  H2O, R-12, and R-22. It  also calculates  the thermodynamic properties as function of  saturationtemperature and quality and saturation  pressure and quality. Program was developed using the thermodynamic properties of steam properties from 1967 ASME Steam Table [1] andASHRAE tables [5]. Keywords: thermodynamics, properties, steam tables, refrigerant tables, quality. BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5000 BERKALA FISIKA; Vol 16, No 1 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3000 2012-04-04T07:36:29Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pengembangan Sistem Pengukuran Gejala Fisis Longsor Sistem Elektronik Dan Optik Widiyatmoko, Bambang Group THz-Photonics, Bidang Instrumentasi Fisis dan Optoelektronika Pusat Penelitian Fisika – LIPI, Komplek PUSPIPTEK, Setu, tangerang Selatan 15314 Hanto, Dwi Group THz-Photonics, Bidang Instrumentasi Fisis dan Optoelektronika Pusat Penelitian Fisika – LIPI, Komplek PUSPIPTEK, Setu, tangerang Selatan 15314 Puranto, Prabowo Group THz-Photonics, Bidang Instrumentasi Fisis dan Optoelektronika Pusat Penelitian Fisika – LIPI, Komplek PUSPIPTEK, Setu, tangerang Selatan 15314 Landslides are a common disaster in Indonesia so that the necessary anticipation through the monitoring of areas prone to the development of instrumentation systems disaster. Design has been done measuring the physical symptoms of landslides using optical and electronic systems. Measured physical symptoms include a shift in soil, and soil strains. Shift in the electronic ground sensors made by using linear and potensio constan current source. The result of measurement is known that this sensor can detect a shift change of 0.5 mm with a maximum shift of 250 mm. Soil strain measured using a fiber optic brag grating (FBG), which changes the transmission peak of FBG was done by using the diode laser wavelength sweeping. Fiber brag grating is an optical sensor that works according to the resonant effect of a refractive index grating lattice, where the resonant wavelength is determined by the lattice distance. From this principle it is when the lattice spacing change due to the strain and temperature changes, the peak resonant wavelength will also change. Changes in the resonant peaks are measured to determine the strain or temperature measurement. measurement Simulation showed that the relationship between strain and change in peak wavelength is linear with slope (Δλ / ΔF) 1.41 nm / kNewton. Keywords: Extensometer, linear potentiometers, fiber Brag grating, landslides, system monitoring, disaster   BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3000 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/34499 2020-11-26T09:44:32Z berkala_fisika:ART

nmb a2200000Iu 4500 "201126 2020 eng " 1410-9662 dc APLIKASI MODUL SENSOR CAHAYA GY-302 BH1750 DAN SENSOR JARAK ULTRASONIK HC-SR04 PADA EKSPERIMEN FOTOMETER BERBASIS MIKROKONTROLER ARDUINO UNO Muryani, Sri Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Sumariyah, Sumariyah Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang This  study  aims  to  implement  the  GY-302  BH1750  light  sensor  module  and  the  HC-SR04 ultrasonic proximity sensor to determine the illumination of the test lamp and distance in an Arduino Uno-based photometer experiment.  There were aluminum rail with a total length of 100 cm and the sensor rail with length of 80 cm in the mechanical device of this photometer, while the sensor was made from acrylic. The working principle of this photometer experiment tool began with a DC motor that puts the sensor at the initial state near the limit switch 1. The sensor measured the illumination and distance to display on the LCD. The motor moved the sensor  away  from  the  lamp  and the  sensor  stopped  every  5  cm  change in  distance,  then  the sensor detected the distance and illuminates in which their values were displayed on the LCD. The motor returned to the limit switch 1 when it hits at the limit switch 2 of the limit finish. The average error value of the ultrasonic sensor calibration was 1.35% with the correlation value of 0.9997. Meanwhile the average error value of the light sensor calibration was 3.39% with the  correlation  value  of  0.9867.  The  results  of  this  photometer  experiment  showed  that  the intensity of the yellow, clear, red, and blue lights are 7.91, 6.42, 2.10, and 0.49 Cd with error values of 15.66, 11.61, 9.12, and 7.34% and the correlation values of 0.9954, 0.9983, 0.9987, 0.9981, respectively. Keywords: Photometer, light sensor, proximity sensor  BERKALA FISIKA 2020-11-26 09:44:32 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/34499 BERKALA FISIKA; Vol 23, No 4 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5215 2013-07-30T08:53:12Z berkala_fisika:RA

nmb a2200000Iu 4500 "130401 2013 eng " 1410-9662 dc VARIASI MODEL LEFT-RIGHT SYMMETRY DALAM FISIKA PARTIKEL DAN KESESUAIANNYA TERHADAP ANOMALI CHIRAL Maulana, Qidir Jurusan Fisika Fakultas Sains dan Matematika Universitas Diponegoro Satriawan, Mirza Jurusan Fisika Universitas Gadjah Mada Yogyakarta It has been done variation left-right symmetry model in particle physics that depend onL R I SU(2) ⊗SU(2) ⊗U(1) gauge. With assumption leptons and quarks sector massformation is different, so we introducing new particles in quarks sector , , , L L R U D U and R D .From this idea will be examined chiral anomaly to decide are this variation model can becandidate besides standard model of particle physics. Keywords : left-right symmetry model, chiral anomaly BERKALA FISIKA 2013-07-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5215 BERKALA FISIKA; Vol 16, No 2 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3040 2012-04-07T12:46:48Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Karakterisasi Zona Sliding Di Perbukitan Ranggawulung Subang Dengan Metoda Geolistrik Tahanan Jenis Susanto, Kusnahadi Jurusan Fisika, Fakultas MIPA,Universitas Padjadjaran Zaenudin, Ahmad Jurusan Teknik geofisika, Fakultas Teknik, Universitas Lampung Subang Ranggawulung Hills is a road connecting Bandung- Subang which is landslide-prone. Landslides have occurred in the area and now the potential for ground movement is still visible which is characterized by crack and wave roads and buildings sideway. This study characterizes the sliding zone and the direction of movement of ground geoelectric resistivity method. Geoelectrical resistivity method to detect the existence of a sliding zone of the layer surface lapsed causes that caused Landslides. Of geoelectric resistivity cross-section indicates that the contact area between the layers with a certain slope at a depth of about 3-10 m below ground surface. Fields marked with a contact layer of low resistivity value of about 5-10 m which is consistent on all tracks. By observing these results can be seen that the hills Ranggawulung potential for the occurrence of landslides, although slow moving. Key words: landslides, low resistivity BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3040 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/46857 2022-06-13T14:40:23Z berkala_fisika:ART

nmb a2200000Iu 4500 "220613 2022 eng " 1410-9662 dc PENENTUAN DOSIS SERAP RELATIF RADIASI SINAR-X PADA RADIOGRAFI THORAKS DENGAN VARIASI PERIODE PEMERIKSAAN KESEHATAN MENGGUNAKAN APLIKASI MCNPX Sukmawati, C. B. Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Arianto, Fajar Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Hidayanto, Eko Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro dosis serap relatif, radiografi thoraks, pesawat sinar-X, MCNPX, dosis efektif relatif, medical checkup. United Nations Scientific Committe on the Effects of Atomic Radiation (UNSCEAR) menyatakan bahwa bagian terbesar dari aplikasi radiasi di bidang medik adalah dari paparan radiasi sinar- X  pada  pemeriksaan  rutin  radiologi  diagnostik,  terutama  pada  prosedur  medical  checkup. Penelitian  ini  bertujuan  untuk  mengetahui  nilai  dosis  serap  relatif  yang  diterima  pasien  pada beberapa  kali  variasi  penembakan.  Penelitian  ini  dilakukan  dengan  memodelkan  simulasi penembakan pesawat sinar-X pada phantom ORNL-MIRD dengan posisi Postero-Anterior (PA) pada posisi -y. Sumber radiasi terletak pada koordinat x=0, y=110 dan z=47 dan menggunakan partikel  foton  (p)  dengan  besar  energi  pesawat  sinar-X  25  KeV  sampai  80  KeV.  Pemodelan dalam penelitian  dilakukan  dengan  menggunakan  program  Monte  Carlo  N-Particle  eXtended (MCNPX). Perhitungan  nilai  dosis  serap  dari  hasil  pemodelan  mendapatkan  hasil  dosis  relatif paling tinggi pada pemeriksaan rutin radiologi diagnostik sebesar 2,67 mGy pada interval waktu satu  bulan  satu kali  dengan  energi  25  KeV  pada  tiga  kali  penembakan.  Dosis  serap  paling rendah sebesar 0,012 mGy pada interval waktu dua belas bulan satu kali sekali dengan energi 80  KeV  pada  satu  kali  penembakan.  Dari  perhitungan  dosis  serap  relatif,  didapatkan  nilai dosis  efektif  relatif.  Dosis efektif  relatif  dibandingkan  dengan  nilai  radiasi  dosis  rendah  yang ditentukan  oleh  BAPETEN  untuk  mengetahui  apakah  nilainya  melebihi  ambang  batas rekomendasi atau tidak. BERKALA FISIKA 2022-06-13 14:40:23 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/46857 BERKALA FISIKA; Vol 25, No 1 (2022): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/6182 2014-02-10T09:35:04Z berkala_fisika:EDT

nmb a2200000Iu 4500 "131001 2013 eng " 1410-9662 dc Berkala Fisika Vol. 16 No. 4 Tahun 2013 Berkala Fisika, Tim Redaksi Jurusan Fisika UNDIP, Kampus Tembalang, Semarang 50275 Berkala Fisika Vol. 16 No. 4 Tahun 2013 BERKALA FISIKA 2014-02-10 09:02:33 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/6182 BERKALA FISIKA; Vol 16, No 4 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3057 2012-04-07T08:42:00Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Simulasi Numerik Osilator Harmonis Edi Widodo, Catur Jurusan Fisika, FMIPA, Universitas Diponegoro A program for explain movement the harmonis oscillator have been done with Python programming language version 4.2. Program was simulated simple harmonic oscillator and damped harmonis oscillator.Program was constuct by mean finite difference equation in object oriented programming Python. First, object simulation is simple harmonic motion consist spring and mass slides on a frictionless horizontal surface. Second, object simulation is damped harmonic motion consist spring, mass and piston. The result of simulation indicated that the frequency osilation depend with force constant of the spring and mass, and damped depend damping ratio and mass.   BERKALA FISIKA 2012-04-06 10:17:20 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3057 BERKALA FISIKA; Vol 10, No 3 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2705 2012-03-29T15:32:53Z berkala_fisika:RA

nmb a2200000Iu 4500 "120328 2012 eng " 1410-9662 dc Mikrostruktur Semikonduktor GaN di Atas Substrat Silikon Dengan Metode Sol-Gel Sutanto, Heri Laboratorium Fisika Material, Jurusan Fisika, Fak. MIPA, Universitas Diponegoro Nurhasanah, Iis Laboratorium Fisika Material, Jurusan Fisika, Fak. MIPA, Universitas Diponegoro Istadi, Istadi Laboratorium Kimia Fisik, Jurusan Teknik Kimia, Fak.Teknik, Universitas Diponegoro Maryanto, Maryanto Laboratorium Fisika Material, Jurusan Fisika, Fak. MIPA, Universitas Diponegoro Ambikawati, Wahyu Laboratorium Fisika Material, Jurusan Fisika, Fak. MIPA, Universitas Diponegoro Marlini, Nofi Laboratorium Fisika Material, Jurusan Fisika, Fak. MIPA, Universitas Diponegoro Gallium nitride (GaN) semiconductor thin films have been successfully deposited on Si substrate (004) by sol-gel method. Gel prepared from the crystal gallium-citrate-amines. These crystals formed from a solution containing the ions Ga+3 and citric acid (CA). Gel in place on the substrate and then rotated with a speed of 1100 rpm. The gel layers are obtained and then placed on the programmable furnace. Deposition temperature varied of 800, 900 and 1000oC in a nitrogen gas environment during 2 hour. The crystal quality of GaN thin films have characterized by XRD measurement. The surface morphology and cross section of the films observed by SEM. The film compositions determined by EDX characterization. The results showed that all the GaN thin films on silicon substrate have oriented polycrystalline structure. The crystal quality of GaN film is formed is influenced by the deposition temperature. In a deposition temperature range is used, increasing the deposition temperature can improve the crystal quality of GaN films.   Keywords: GaN Thin Films; Spin-Coating Technique; Silicon Substrate BERKALA FISIKA 2012-03-28 21:38:25 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2705 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/54924 2023-06-01T04:13:32Z berkala_fisika:ART

nmb a2200000Iu 4500 "230601 2023 eng " 1410-9662 dc RANCANG BANGUN SISTEM DATA LOGGER DAN MONITORING UNTUK INSTALASI PANEL SURYA GRID TIE (GTI) INVERTER 600 W DENGAN INTERFACING BLYNK Taqwin, Rafly Akhsani Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro Tadeus, Dista Yoel Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro Mangkusasmito, Fakhruddin Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro Putranto, Ari Bawono Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro Monitoring, solar panels, grid tie, PLN, On-Grid Solar  energy  is  an  inexhaustible  source  of  renewable  energy.  Indonesia,  which  is  a  tropical country  that  is  crossed  by  the  equator,  has  a  fairly  high  solar  intensity  per  year.  With  this potential, it is necessary to process or develop the alternative energy. One way to develop this potential is to use solar panels that can convert solar energy into electrical energy. In this study, we developed a data logger system design tool for the installation of an Arduino-based 600 W inverter grid tie (GTI) solar panel. Nowadays, observation or monitoring still uses conventional or  manual  methods.  Therefore,  in  making  this  task  we  made  a  voltage,  current,  and  power monitoring tool on a solar panel that functions as a current, voltage and power sensor with the Arduino Mega microcontroller as an output data store which will be communicated via Android. The results of the data will be analyzed by calculating the break even point (BEP) to determine the feasibility of procuring On-Grid solar panel systems. From the BEP calculation results, the average energy supply from solar panels is 5% or every month solar panels can reduce costs by Rp.42,000. From these results it is known that the value of the BEP from the procurement of On-Grid solar panels can be achieved for 7 years and 4 months, only then it will be profitable. BERKALA FISIKA 2023-06-01 04:13:31 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/54924 BERKALA FISIKA; Vol 26, No 1 (2023): Berkala Fisika eng Copyright (c) 2023 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/7389 2014-09-24T09:09:21Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc PREDIKSI PENURUNAN KUALITAS UAP PEMBANGKIT LISTRIK TENAGA GEOTERMAL DIHUBUNGKAN DENGAN STRATEGI PEMELIHARAAN DIMASA YANG AKAN DATANG Mulyana, Cukup Fisika Universitas Padjadjaran Jl. Raya Bandung-Sumedang Km. 21 Jatinangor Nurhilal, Otong Fisika Universitas Padjadjaran Jl. Raya Bandung-Sumedang Km. 21 Jatinangor H Saad, Aswad Fisika Universitas Padjadjaran Jl. Raya Bandung-Sumedang Km. 21 Jatinangor Taufik, Ahmad Institut Teknologi Bandung Jl. Ganesha 10 Bandung In Geothermal power plant steam quality plays a very important role because it is associated with enthalpy and affects the reliability of the turbine. Studies have been carried out on the trend of a decrease in pressure, temperature and flow that comes out of a wellhead for 25 years. In addition the study also conducted in steam pressure drop duriing transmission process in the pipeline from the wellhead to the turbine due to friction factor , elevation , and junctions. Existing wellhead temperature is 202OC – 243OC, pressure of 8.2 kg/cm2 – 12.7kg/cm2. Operating parameters of the turbine are minimum pressure of 6.5 kg/cm2 and superheat temperature of 169oC. By looking at the trend of decrease in pressure and temperature, in the next few years is concerned to be achieved under the limit pressure. Concerning the decrease of enthalpy, give impact to decreasing of KWh. Therefore it should be anticipated from the beginning so it is not threat the continuity of the operation of geothermal power. From the study enthalpy did not decrease significantly in other hand the pressure drop significantly at the wellhead. The steam quality is still in good because the steam is superheated condition. The problem that needs to be addressed is the pressure drop from the wellhead to the turbine at 16.1 %. It is recommended to replace the T junction into a Y junction in order to minimize the pressure drop in the pipeline transmission. Keywords : steam quality, pressure, temperature, wellhead BERKALA FISIKA 2014-09-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/7389 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 2 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3073 2012-04-07T08:52:15Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Efek Magneto Optis pada Lapisan Tipis (ZnO) Adi, Muhamad Jurusan Fisika FMIPA Universitas Diponegoro Firdausi, K. Sofjan Jurusan Fisika FMIPA Universitas Diponegoro Setia Budi, Wahyu Jurusan Fisika FMIPA Universitas Diponegoro The magneto optics phenomenon on a thin film has been observed using Michelson Interferometer. The transparent materials used in the experiment is a cover glass (thickness of 1 mm) coated by the thin film ZnO (Zincite) in 54 mm of thickness. An external magnetic field which is applied to the transparent materials is in the order of 184,95 mT  obtained by a coil inserted by a soft magnet and given by the alternating current. To obtain the change of refractive index, an Michelson Interferometer has been used using He-Ne laser with = 632,8 nm and output power of 1 mW. The change of phase or refractive index of ZnO is very clearly shown by the increasing of number of fringes as the magnetic fields increases. The order of the linear coefficient magneto optics is 10-10 m/V indicates that it is very reactive to a external applied field. Keywords: Michelson Interferometer, Non-linear Optics, Refraction Index and Linear Magneto-optic Coefficients BERKALA FISIKA 2012-04-06 10:17:48 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3073 BERKALA FISIKA; Vol 10, No 1 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2816 2012-03-29T15:40:30Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Respon Berbagai Bentuk, Ukuran dan Bahan Elektroda Pada Pengayaan Elektrolisis Tritium dalam Sampel Air Hidayanto, Eko Jurusan Fisika Universitas Diponegoro Semarang Tjahaja, Poppy Intan Pusat Penelitian dan Pengembangan Teknik Nuklir (P3TkN) Bandung Arif, Idam Departemen Fisika Institut Teknologi Bandung Experiments were carried out to investigate the effects of various forms, sizes and materials of electrodes in the electrolytic enrichment for the determination of tritium concentration in water sample. Electrodes were made in several forms: square plate, cylinder and spiral. The electrolytic enrichment was carried out by conducting electric current to the electrodes in electrolytic cell at 150C filled with water sample, until the water volume is reduced to 10% from the initial volume. The concentrated water were then mixed with scintillate solution, and then counted using Liquid Scintillation Counter (LSC). The results show that the appropriate electrodes is nickel square plate with the recovery fraction and the enrichment factor respectively are 73.73% and 7.373 BERKALA FISIKA 2012-03-29 09:57:34 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2816 BERKALA FISIKA; Vol 12, No 3 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/71280 2025-02-24T08:39:37Z berkala_fisika:ART

nmb a2200000Iu 4500 "240715 2024 eng " 1410-9662 dc IDENTIFIKASI LEVEL NOISE, RESOLUSI SPASIAL DAN LOW CONTRAST CITRA CT SCAN PADA OBJEK FANTOM RAHIM BUATAN Gunawan, Mutiara Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Astuty, Sri Dewi Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Dewang, Syamsir Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Purwanto, Purwanto Instalasi Radiologi, RS dr. Wahidin Sudirohusodo, Makassar, Indonesia fantom rahim buatan, resolusi spasial, low contrastt, level noise Kontrol kualitas radiasi maupun kualitas citra memegang peranan penting dalam uji kelayakan klinis suatu modalitas pesawat radiologi. Quality Control (QC) dilakukan untuk mematuhi standar yang diijinkan baik terhadap keluaran radiasi maupun hasil citra yang optimal untuk mendukung penegakan diagnosa. CT-scan merupakan salah satu perangkat diagnostik yang memerlukan pengujian QC citra medis yang kompleks karena memiliki banyak indikator penilaian seperti resolusi spasial, low contrastt, keseragaman noise, uniformity dan linearitas. Salah satu implementasi edukasi untuk penelitian terkait penggunaan radiasi adalah uji kualitas citra menggunakan fantom rahim buatan berbahan dasar agar, plastisin dan gel. Bagian dalam fantom diasumsikan sebagai jaringan kista (gumpalan darah lebih fluid), lesi (gumpalan darah lebih padat) dan kantung rahim (berisi air). Penelitian bertujuan untuk mengetahui kualitas citra CT-Scan fantom rahim berdasarkan nilai level noise, resolusi spasial (SNR) dan low contrastt (CNR dan MTF). Hasil penelitian menunjukkan bahwa tegangan 80 - 120 kV menghasilkan nilai SNR antara 5,72  - 6,60. Nilai CNR untuk jaringan kantung rahim berisi cairan sebesar 6,77, untuk jaringan lesi sebesar 19,56 dan untuk jaringan kista sebesar 192,15. Karakteristik nilai CTN untuk setiap objek yang diuji mendekati nilai jaringan yang sebenarnya dengan hasil uji kualitas citra fantom meningkat dengan BERKALA FISIKA 2025-01-08 09:35:44 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/71280 BERKALA FISIKA; Vol 27, No 2 (2024): Berkala Fisika eng Copyright (c) 2025 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/9386 2015-11-05T08:34:23Z berkala_fisika:EDT

nmb a2200000Iu 4500 "150102 2015 eng " 1410-9662 dc Redaksional Januari 2015 Berkala Fisika, Tim Redaksi Jurusan Fisika Fakultas Sains dan Matematika UNDIP Redaksional Januari 2015 BERKALA FISIKA 2015-11-05 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/9386 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 1 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3090 2012-04-07T12:35:58Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Penentuan Karakterisasi Cerrobend Sebagai “Wedge Filter” Pada Pesawat Teleterapi 60Co Azam, Much. Jurusan Fisika, FMIPA,Universitas Diponegoro Firdausi, K. Sofjan Jurusan Fisika, FMIPA,Universitas Diponegoro Silvani, Sisca Jurusan Fisika, FMIPA,Universitas Diponegoro Wedge filter usually used in cavum nasi ossa maxillaris tumor therapy. And usually it is made of timbal. However, cerrobend as the alternative material is possible and needed too. The material characterization is done through determining the linear absorption coeffisien of cerrobend and the proportion of the thickness of cerrobend to timbal,  and as well as comparing the total treatment dose rate of timbal wedge filter with cerrobend wedge filter. Based on the result of the research, it is found that the linear absorption coeffisien value of cerrobend wedge filter with energy of 1.33 MeV is 0.43% cm-1. The average ratio of the thickness of cerrobend to timbal is 1.485 ± 0.002, and the difference of the total treatment dose rate between those two wedge filter is only a little, that is 0.72 cGy/minutes.  Keywords : cerrobend, wedge filter and the linear absorption coeffisien BERKALA FISIKA 2012-04-06 10:20:34 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3090 BERKALA FISIKA; Vol 9, No 3 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2875 2012-03-29T14:25:06Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pengaruh Laju Molar Mn Larutan Terhadap Mikrostruktur Lapisan Tipis GaN:Mn yang Dideposisi di atas Substrat Si Menggunakan Metode Sol-Gel Sutanto, Heri Jurusan Fisika-FMIPA, Universitas Diponegoro, Semarang Hidayanto, Eko Jurusan Fisika-FMIPA, Universitas Diponegoro, Semarang Nurhasanah, Iis Jurusan Fisika-FMIPA, Universitas Diponegoro, Semarang Istadi, Istadi Jurusan Teknik Kimia-FT, Universitas Diponegoro, Semarang A thin layer of material deposition of GaN: Mn by sol-gel method has done using spin-coating technique. Solution of gallium-citrate-amine maganese-Ga2O3 synthesized using as a source of Ga and Mn MnO2 as the source. Solution varied with the mole fraction solution of 60-80% Mn. Brown crystals that formed subsequently dissolved in ethylenediamine to form a gel. Subsequent gel superimposed on top of Si substrates with a spin-coater at a rate of 1100 rpm. Layers formed at temperatures of 900oC and then disintering in UHP N 2 gas environment to form the decomposition of GaN: Mn. The results of spectral analysis of energy dispersive X-ray (EDX) showed incorporation of Mn into the GaN mole fraction increased with the addition of a solution of Mn in the solution used. EDX Test results show that thin films of GaN: Mn impurity contained carbon (C) up to 36.71%. Image scanning electron microscopy (SEM) a thin layer of GaN: Mn shows in general have been obtained surface roughness (rms) morphology of the layer reaches the order of nanometers up to 24.36 nm. From the results already obtained show that the sol-gel deposition method has been able to produce a thin layer of magnetic semiconductors with a nearly homogeneous surface morphology. Thus the sol-gel method could be developed for alternative methods of deposition of thin layers that are economical and simple. Key words: GaN: Mn, CSD, Thin Layer, Mn incorporation. BERKALA FISIKA 2012-03-29 11:12:16 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2875 BERKALA FISIKA; Vol 14, No 2 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/12803 2016-12-16T09:42:46Z berkala_fisika:RA

nmb a2200000Iu 4500 "151001 2015 eng " 1410-9662 dc PEMBUATAN SISTEM KENDALI POSISI AUTOFOKUS EKSPERIMEN LENSA DENGAN MOTOR LANGKAH Gunadi, Isnain Jurusan Fisika, Universitas Diponegoro, Semarang Gernowo, Rahmat Jurusan Fisika, Universitas Diponegoro, Semarang Adi, Kusworo Jurusan Fisika, Universitas Diponegoro, Semarang Auto-Fokus, LDR, IPMC, LSW, EAPs, VCM The automatic lens experiment with stepper motor position control has been made. Main component of this device are stepper motor which move the lens and screen. Microcontroller is contens the programs of motor movement controller. The screen contain of Light Dependent Resistor (LDR) as voltage sensor. This image will focused when the voltage in the screen is maximum. The result of test show that the automatic measurement is more accurate than manual measurement. Keywords: Auto-Fokus, LDR, IPMC, LSW, EAPs, VCM BERKALA FISIKA 2016-12-16 09:09:59 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/12803 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 4 Tahun 2015 eng Copyright (c) 2016 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/3106 2012-04-07T12:42:18Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Rancang Bangun Alat Ukur Konduktivitas Panas Bahan Dengan Metode Needle Probe Berbasis Mikrokontroler AT89S52 Syaefullah, Rakhmat Laboratorium Geofisika Undip Yulianto, Gatot Laboratorium Geofisika Undip Suryono, Suryono Laboratorium Instrumentasi dan Elektronika Undip. A device for measuring thermal conductivity of  homogen materials using a Needle Probe method has been designed. This method uses a metal rod which emited a heat stream and a temperature sensor placed in the middle of interior heater at probe to measure changes in temperature inside the probe.            This measuring instrument represent development digitally from measuring instrument which have been made with analog system. With AT89S52 microcontroller application as data processor bases, temperature detected can be presented by sevent segment which have been controlled by BCD converter. Basically thermal conductivity measuring instrument with this Needle Probe method represent a digitally thermal detecting system which attached at Needle Probe. Every increase 1 0C, the temperature censor give output equal to 0.01 V with correctness of  displayed equal to 1 0C and error point level equal to 0.01 %. Key word: Needle Probe method, ADC, AT89S52 microcontroller, seven segment. BERKALA FISIKA 2012-04-06 10:20:14 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3106 BERKALA FISIKA; Vol 9, No 1 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2928 2012-03-30T14:29:52Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc KAJIAN PENGARUH WARNA DAN JARAK LAMPU PENGAMAN TERHADAP HASIL RADIOGRAF Setiyono, Setiyono RSUD Azam, M. Jurusan Fisika, Universitas Diponegoro Semarang Setiawati, Evi Jurusan Fisika, Universitas Diponegoro Semarang The study of influence of distance, time and color for safety lamp filter variation to radiograph has been done.  The research used blue sensitive film and green sensitive, type ­-X ray, film. The research was conducted by illuminating film with safety lamp red, yellow, green and blue color filter. The type of filter was red acrylic riddle and glass which was layered in red, yellow, green and blue scot light. The variation of irradiating distance between safety lamp with film was 20 cm, 30 cm, 40 cm, 50 cm, 60 cm, 70 cm, 80 cm, 90 cm, 100 cm and variation of time is 10 second, 15 second, 20 second, 25 second, 30 second, 35 second, 40 second, 45 second, 50 second, 55 second, and 60 second. Respectualy measurement of irradiating resulted used measuring densitometer instrument. The result of research give an illustration that variation of distance, variation of time and color of safety lamp filter influence the radiograph.  The greater distance caused the fog result becomes smaller.  The longer time caused the fog result becomes bigger.  To red acrylic filter, the fog that resulted exceed the tolerance limit is more than 0,2, but for glass filter that layered red scot light is not more than tolerance limit. Keyword: Radiograph, Blue sensitive film, Green sensitive film, Fog, Scot light. BERKALA FISIKA 2012-03-29 14:56:20 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2928 BERKALA FISIKA; Vol 12, No 1 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/25478 2019-09-17T16:39:09Z berkala_fisika:ART

nmb a2200000Iu 4500 "190917 2019 eng " 1410-9662 dc POLARISASI FLUORESENS PADA VIRGIN COCONUT OIL SETELAH MENGALAMI OZONASI Azzahroh, Muffaricha Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Sugito, Heri Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Richardina, Very Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Azam, Much. Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Firdausi, Ketut Sofjan Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Fluorescence polarization, Virgin Coconut Oil, polarization angle This study investigates interaction effects between ozone and Virgin Coconut Oil (VCO) on fluorescence polarization. The ozonation time variations carried out on VCO were 30 minutes, 60 minutes and 90 minutes with ozone flow rates of 0.6L / minute. The degradation of VCO quality due to ozonation was determined by measuring changes in the fluorescence polarization angle of the light emitted by the sample, using a green laser pointer with a wavelength of 532 nm. Typical fluorescence polarization characteristics in the range of polarization angle variations from  = 0 to  = 180 are in accordance with the results of previous studies. Increasing the length of ozonation in the sample results in an increase in fluorescence polarization. The average fluorescence polarization in the range 0    180 rises linearly over the duration of ozonation, which indicates that ozone interactions are quite effective in degrading the quality of VCO. The validation results also obtained that the duration of ozonation also increases the amount of free fatty acids, however it needs to be further investigated whether the amount of free fatty acids directly contributes to fluorescence polarization. The study of interaction of ozone in solution in biophysics and also its benefits for skin therapy in medical science are very interesting to be further conducted. Keywords: Fluorescence polarization, Virgin Coconut Oil, polarization angle BERKALA FISIKA 2019-09-17 16:39:09 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/25478 BERKALA FISIKA; Vol 22, No 3 (2019): Berkala Fisika Vol. 22 No. 3 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4984 2013-05-27T14:17:59Z berkala_fisika:EDT

nmb a2200000Iu 4500 "120401 2012 eng " 1410-9662 dc Berkala Fisika Berkala Fisika, Tim Redaksi Jurusan Fisika Fakultas Sains dan Mateamtika Universitas Diponegoro Berkala Fisika Vol 15 No 2 (2012) BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4984 BERKALA FISIKA; Vol 15, No 2 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2976 2012-04-03T12:34:42Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Rancang Bangun Generator Pulsa Gelombang Ultrasonik dan Implementasinya untuk Pengukuran Jarak Antara Dua Obyek Syafrudin, Agus Rumah Sakit Umum Daerah NTB Suryono, Suryono Laboratorium Elektronika dan Instrumentasi, Jurusan Fisika FMIPA UNDIP Endro Suseno, Jatmiko Laboratorium Elektronika dan Instrumentasi, Jurusan Fisika FMIPA UNDIP An instrument of pulse generator of ultrasonic wave and its implementation for distance measurement between two objects have been created through analysis using oscilloscope. This ultrasonic wave may be used in a distance measurement, material reflection analysis, and product’s depth. An ultrasonic oscillator is made with set of IC 555 as the setter of pulse amount and multi vibrator mono stabile set of IC 555 as the oscillator of ultrasonic frequency, pulse amplifier through transistor BD 139. An ultrasonic transducer using transducer 400ST/R160 and micro controller AT89S51 is used for time setter. In the amplifier set of ultrasonic receiver, Op-amp CA 3204 is used. AT89S51 is used for time setter that is made repeatedly in order that the bounce may be read on oscilloscope through P1.0. After conducting an experiment, the effective working area frequency in pulse generator of ultrasonic wave is obtained in the frequency of 38.23 kHz. In the experiment on the amount of effective pulse, the maximum reach effectively is 16 pulses. In the experiment on the distance between two objects, the writer finds out that an instrument linier grade is 0.81773 against standard measurement with R=0.99954 and SD=0.457. Meanwhile on the material reflectivity test, the writer may concludes that the bigger material mass, the bigger its reflectivity. Keywords: pulse generator of ultrasonic wave, transducer BERKALA FISIKA 2012-04-03 11:52:36 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2976 BERKALA FISIKA; Vol 11, No 2 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/30611 2020-06-08T15:23:16Z berkala_fisika:ART

nmb a2200000Iu 4500 "200131 2020 eng " 1410-9662 dc RANCANG BANGUN SISTEM KONTROL LAMPU, PAGAR, PINTU, DAN JENDELA (LPPJ) PADA MINIATUR RUMAH MENGGUNAKAN ARDUINO DAN TELEPON SELULE Aziz, Fariz Abdul Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang, Indonesia Sumariyah, Sumariyah Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang, Indonesia Microcontroller, control system, Arduino, cellular-phone, bluetooth The positive impact of technological advancements is to make it easier to use and to control electronic devices by a microcontroller. The aim of this research is to remotely control lights, fences, doors, and windows (LPPJ) on miniature homes using cellular phones connected to bluetooth using Arduino Mega 2560. This control system consisted of Arduino Mega 2560, LDR sensor, servo motor and motor servo2, DC motors, relays, and cellular phones. The workings of the LPPJ control system is when the LDR sensor detects sunlight, then it will give an order to the relay to turn on or off the light. In addition to using the LDR sensor to control the lights, the LPPJ system uses remote control by using cellular phones with communication via Bluetooth to turn on or off the light, to move the fence, door, and window by pressing the button on the cellphone. It is successfully designed and developed a control system of LPPJ on miniature homes using the cellular phones. BERKALA FISIKA 2020-06-08 13:14:30 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/30611 BERKALA FISIKA; Vol 23, No 1 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4995 2013-05-27T16:00:41Z berkala_fisika:RA

nmb a2200000Iu 4500 "121001 2012 eng " 1410-9662 dc ANALYTICAL MODELING OF NON PLANAR MOSFET Endro Suseno, Jatmiko Jurusan Fisika FSM Universitas Diponegoro The Non Planar MOSFET structure with curved-channel is one alternative MOSFET structure for enhance the electrical performance. The study was focused on the non planar deviceswhich has curved-channel including grooved-gate, recessed-channel, V-shaped and sidewallvertical MOSFET. The presence of corner region can effective in reducing the electric field at thedrain, thus improving reliability of short channel effects (SCEs). The corner effect can reducesurface potential. It can improve the characteristic of the device electrical performance, especiallythe reduction of short channel effect and hot carrier effects. Therefore, the curved-channelMOSFET has a very great application prospect in deep submicron device architecture. Keywords: MOSFET, Non Planar, curve channel, surface potential, short channel effects BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4995 BERKALA FISIKA; Vol 15, No 4 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2995 2012-04-04T06:00:59Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Persamaan Fokker Planck dan Aplikasinya Dalam Astrofisika Palupi, Dwi Satya Jurusan Fisika ,FMIPA UGM Abstract It has been established Fokker-Planck equation to obtain the evolution of particle distribution functions that describe the motion of particles in a fluid that can not be described by the Liouville equation. Fokker-Planck equation contains a diffusion component particles and the interaction between the particles will be discussed application of Fokker-Planck equation in astrophysics since the plasma in the form of interstellar space so that there is interaction between the particles making up the plasma.   Keywords: Fokker-Planck, plasma, astrophysics BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2995 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/34361 2020-11-22T18:12:16Z berkala_fisika:ART

nmb a2200000Iu 4500 "200731 2020 eng " 1410-9662 dc ANALISIS POTENSI TANAH LONGSOR DI PADANGSARI BANYUMANIK SEMARANG Setyawan, Agus Departemen Fisika Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Putra, Hisbicus Dwi Surya Departemen Geologi, Fakultas Teknik, Universitas Diponegoro, Semarang Suseno, Jatmiko Endro Departemen Fisika Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Yulianto, Tony Departemen Fisika Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Semarang city is a city that grew out of old settlement built on alluvial sediment. The conditions cause many natural disasters such as floods and landslides. Padangsari Village, Banyumanik District located in the Southern part with hilly morphology and lithology from Mount.Ungaran. Positive  potential  is  the  existences  of  material  for  development  that  are  useful  for  the community, otherwise the negative potential there is soil vulnerability than can cause landslide. Classification of positive and negative potentials is obtained from combining several data and factor  such  as:  rainfall,  slope,  groundwater  level,  lithology,  sedimentation  and  landuse.  All data were processed with ArcGis softwere and produces a potential map for the Padangsari Village. Hopefully the map will be useful for research and society in Padangsari to produce policy when infrastructure development. Keywords:  Landuse,  landslide,  rainfall,  slope,  groundwater  level,  lithology,  sedimentation, Padangsari BERKALA FISIKA 2020-11-22 17:41:26 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/34361 BERKALA FISIKA; Vol 23, No 3 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5011 2013-05-27T16:21:52Z berkala_fisika:EDT

nmb a2200000Iu 4500 "110701 2011 eng " 1410-9662 dc Berkala Fisika Berkala Fisika, Tim Redaksi Jurusan Fisika FMIPA Universitas Diponegoro Berkala Fisika Vol 14 No. 3 (2011) BERKALA FISIKA 2013-05-27 13:55:05 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5011 BERKALA FISIKA; Vol 14, No 3 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3035 2012-04-06T07:42:41Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pengaruh Aliran Gas Nitrogen Pada Karakteristik Listrik Film Gan Yang Ditumbuhan Di Atas Substrat Silikon (111) Dengan Teknik Sol Gel Spincoating R. Tayubi, Yuyu Jurusan Fisika FPMIPA UPI Bandung Rusdiana, Dadi Jurusan Fisika FPMIPA UPI Bandung GaN thin films have been successfully grown on silicon substrate (111) by sol gel technique spincoating with nitrogen gas flow variation. GaN films were characterized using X-ray diffraction, SEM and electrical characteristics. The results showed that the film has a polycrystalline structure, while the electrical characterization of resistivity measurements on several samples of GaN films with the variation of N2 gas flow rate showed that the electrical resistivity of films decreased when the rate of N2 gas flow is increased.   Keywords: GaN, sol gel spincoating, resistivity. BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3035 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/44184 2022-01-16T05:28:56Z berkala_fisika:ART

nmb a2200000Iu 4500 "220116 2022 eng " 1410-9662 dc RANCANG BANGUN PROTOTIPE SISTEM KONTROL PARKIR MENGGUNAKAN SENSOR FINGERPRINT BERBASIS ARDUINO UNO Sari, W.T. Departemen Fisika, Universitas Diponegoro Semarang Sumariyah, Sumariyah Departemen Fisika, Universitas Diponegoro Semarang Suseno, Jatmiko Endro Departemen Fisika, Universitas Diponegoro Semarang sistem kontrol parkir, sensor fingerprint, Arduino Uno, Delphi 7 Sebagian  besar  tempat  parkir  menggunakan  cara  manual  sehingga  masih  banyak  memiliki kekurangan, salah satunya yaitu tingginya tingkat pencurian kendaran bermotor. Pada penelitian ini akan dibangun dan diimplementasikan sistem kontrol parkir menggunakan sensor fingerprint berbasis Arduino Uno. Pada penelitian ini, sistem parkir khusus yang sesuai dengan database sidik jari  yang  telah  terverifikasi  oleh  sensor  fngerprint  dan  tersimpan  pada  komputer,  selanjutnya ketika  user  akan  parkir,  user  hanya  menempelkan  sidik  jari  dan  mengunggu  sidik  jari teridentifikasi  dengan  database  sidik  jari  melalui  I2C  Arduino  Uno  ke  komputer.  Ketika  sudah teridentifikasi,  palang  pintu  parkir  akan  terbuka  dan  data  user  parkir  akan  disimpan  dalam database  parkir.  Namun,  apabila  sidik  jari  user  tidak  dapat  teridentifikasi,  maka  palang  pintu parkir tidak akan terbuka sehingga user tidak dapat parkir pada area tersebut. Pengujian sensor fingerprint dengan cara permukaan jari ditekan dan tanpa ditekan, dan didapatkan nilai rata-rata respon time dengan permukaan jari ditekan sebesar 1,37 s dengan tiga kali pengulangan dan nilai rata-rata respon time dengan permukaan jari tanpa ditekan  sebesar 2,16 s serta rata-rata nilai error yaitu 2,7%. Dengan rancang bangun ini, diharapkan dapat terbentuk sistem parkir khusus dengan menggunakan sistem kontrol. Sistem kontrol parkir ini perlu dan cocok diterapkan untuk parkir  karyawan  di  perkantoran,  rumah  sakit,  sekolah,  dan  perguruan  tinggi  karena  memiliki sistem keamanan yang lebih baik. BERKALA FISIKA 2022-01-16 05:28:56 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/44184 BERKALA FISIKA; Vol 24, No 3 (2021): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/6177 2014-02-10T15:56:24Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc RANCANG BANGUN ALAT UKUR KEKERUHAN AIR BERBASIS MIKROKONTROLER Eka Nuzula, Nike Jurusan Fisika, Fakultas MIPA Institut Teknologi Sepuluh Nopember Endarko, Endarko Jurusan Fisika, Fakultas MIPA Institut Teknologi Sepuluh Nopember Turbidity meter based on microcontroller has succesfully been designed and fabricated. The photodiode as sensor and a LED as light source were used for measuring level of waterturbidity whereas microcontroller ATMega 8535 was used for data processing. The turbidity levelof water is measured based on Nephelometer method. The LED and photodiode detector were positioned parallel to each other at a distance of 2 inches. The measurement results indicated that the turbidity meter could be used to measure the turbidity level of water in the range 0 – 200 NTUand the maximum of standard deviation was at 1.33 NTU. Keywords : Turbidity, NTU, Photodiod, LED, Nephelometer BERKALA FISIKA 2014-02-10 09:02:33 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/6177 BERKALA FISIKA; Vol 16, No 4 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3052 2012-04-06T20:19:30Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Studi Radiografi Makro Dengan Variasi Jarak Sumber Sinar-Bayangan (SID) dan Ukuran Fokus Terhadap Pembesaran Bayangan Suriansyah, Nanang Instalasi Radiologi RSU Dr. Agoesdjam Ketapang Kalimantan Barat Setiawati, Evi Laboratorium Fisika Atom & Nuklir, Jurusan Fisika FMIPA UNDIP Firdausi, K. Sofjan Laboratorium Fisika Atom & Nuklir, Jurusan Fisika FMIPA UNDIP The dependence of radiograph magnification (M) on the ratio focal spot size to object ( has been studied. The object shape like a coin made from iron which different diameter and variation focal spot size have been used. The experiment condition were set up at the distance of the object to the film of 0 cm (object stick the film) and 45 cm, with the tube voltage of 50 kV, tube’s current of 100 mA, and time of 0.04 s. The results show that the increasing of (leads to the increasing of (M) when the distance of the object to the film is more than 0 (b>0).   Keyword: focal spot, SID, magnification radiograph BERKALA FISIKA 2012-04-06 10:17:07 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3052 BERKALA FISIKA; Vol 10, No 4 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2458 2012-03-29T14:43:26Z berkala_fisika:RA

nmb a2200000Iu 4500 "120319 2012 eng " 1410-9662 dc Mekanisme Hamburan Defek Statis Dan Vibrasi Termal Terhadap Mobilitas Elektron Pada Film Tipis GaN Rusdiana, Dadi Jurusan Pendidikan Fisika, FPMIPA UPI Bandung Hasanah, Lilik Jurusan Pendidikan Fisika, FPMIPA UPI Bandung Suhendi, Endi Jurusan Pendidikan Fisika, FPMIPA UPI Bandung Electrons Mobility in GaN thin films has been determined for temperature variation using approach method to the relaxation time due to the influence of static defect scattering and thermal vibrations. The simulation results show that electron mobility is strongly influenced by environmental temperature, except for the scattering of neutral impuritas type that does not affect the value of the charge carrier mobility even though the external temperature was varied.   Keywords: Electrons Mobility, defect static, thermal vibration BERKALA FISIKA 2010-10-22 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2458 BERKALA FISIKA; Vol 13, No 1 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/51390 2023-01-02T05:20:17Z berkala_fisika:ART

nmb a2200000Iu 4500 "230102 2023 eng " 1410-9662 dc KOMPARASI ENTRANCE SURFACE AIR KERMA (ESAK) DENGAN SOFTWARE CALDOSE_X DAN METODE TUBE OUTPUT PADA PASIEN THORAX DEWASA DALAM PEMERIKSAAN RADIOGRAFI UMUM BERDASARKAN DATA SI-INTAN Ari Wiganti, Anugrah Rahma Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Hidayanto, Eko Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Marhaendrajaya, Indras Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Triadyaksa, Pandji Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang ESAK, Thoraks, CALDose_X, Metode Tube Output, DRL. Kuantitas  operasional  dosimetri  didasarkan  pada  pengukuran  Entrance  Surface  Air  Kerma (ESAK),  baik  secara  langsung  dengan  thermoluminescence  dosimeter  (TLD)  maupun  tidak langsung dengan memanfaatkan keluaran radiasi pesawat sinar-X.  Namun, CALDose_X dan juga  metode  Tube  Output  mampu  melakukan  perhitungan  dosis  menggunakan  persamaan standar.  Penelitian  ini  bertujuan  untuk  menghitung  ESAK  pada  pemeriksaan  Thorax  radiografi umum  proyeksi  Anterior  Posterior  (AP)  dan  Posterior  Anterior  (PA)  berdasarkan  data  SI- INTAN  dengan  perangkat  lunak  CALDose_X  dan  metode  tube  output  serta  menganalisis perhitungan  ESAK  tersebut  dengan  nilai  Diagnostic  Reference  Level  (DRL).  Data  penelitian bersumber  pada  basis  data  SI-INTAN  Bapeten  yang  berupa  data  survei  pasien  dan  data  keluaran radiasi pada salah satu rumah sakit di Jawa Timur yaitu sebanyak 76 data proyeksi AP dan 111 data proyeksi  PA.  Data  diolah  menggunakan  CALDose_X  dan  metode  tube  output  serta  diuji menggunakan uji normalitas dan uji Wilcoxon. ESAK pada pemeriksaan thorax dewasa radiografi umum rumah sakit X proyeksi AP dengan CALDose_X sebesar 0,34±0,055 mGy dan metode tube  output  sebesar  0,33±0,059  mGy.  Sedangkan  proyeksi  PA  dengan  Caldose-X  yaitu sebesar  0,31±0,13  dan  metode  tube  output  sebesar  0,30±0,13  mGy.  ESAK  pemeriksaan Thorax  di  rumah  sakit  X  pada  CALDose_X  menunjukkan  tidak  ada  perbedaan  yang signifikan dengan metode tube output dan nilainya lebih rendah daripada DRL Indonesia. BERKALA FISIKA 2023-01-02 05:17:57 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/51390 BERKALA FISIKA; Vol 25, No 4 (2022): Berkala Fisika eng Copyright (c) 2023 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/7384 2014-09-24T09:08:04Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc PENENTUAN QUALITY CONTROL (QC) RESOLUSI SPASIAL PADA CITRA CT SCAN DENGAN METODE LINE SPREAD FUNCTION (LSF) DAN POINT SPREAD FUNCTION (PSF) MENGGUNAKAN PHANTOM AAPM CT PERFORMANCE Yusanti, Weirna Prodi Magister Ilmu Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Budi, Wahyu Setia Laboratorium Fisika Atom dan Nuklir Jurusan Fisika Universitas Diponegoro Adi, Kusworo Laboratorium Instrumentasi dan Elektronika Jurusan Fisika Universitas Diponegoro Computed Tomography (CT scan) is one of the X-ray modalities used in radiodiagnostic, as result it needs to do Quality Control (QC). This study focused on the image quality test of CT Scan by considering the spatial resolution parameters and using calculation method of the digital image. The effect of exposure factors (voltage and electric current) was also on image quality. This study using multislice CT (MSCT) 128 slice and AAPM CT Performance Phantom. Phantom scanned with the variation of exposure factors (80, 100, 120 kV and 50, 100, 150, 200, 250, 300, 350, 400, 450, 500 mA). The determination of spatial resolution value derived from the value of Full Width at Half Maximum (FWHM) of the Line Spread Function (LSF) and Point Spread Function (PSF) graphics. Results shown that the higher voltage applied, the smaller value of FWHM which show better image quality. This method is able to detect spatial resolution up to the 5th level (hole diameter 0.75 mm), whereas it is only up to 3rd level (1.25 mm) visually. The image quality in this study has been compared with the rules of West Austr Compliance Testing Protocol 2006, and it is proved that the  image quality is still good, thus the CT Scanner is still feasible to  use. Key words: CT Scan, Spatial Resolution, Line Spread Function, Point Spread Function BERKALA FISIKA 2014-09-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/7384 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 2 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3068 2012-04-07T08:47:22Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc SIMULASI GERAK PARTIKEL BERMUATAN DALAM PENGARUH MEDAN LISTRIK DAN INDUKSI MAGNET MENGGUNAKAN MATLAB VERSI 7.1 Azam, Much. Lab Fisika atom dan inti , Fisika FMIPA UNDIP Kusbramanto, Tomy Lab Fisika atom dan inti , Fisika FMIPA UNDIP Endro Suseno, Jatmiko Lab Fisika atom dan inti , Fisika FMIPA UNDIP Charged particle motion under external electric, magnetic induction, and electric-magnetic induction field simulation program has been made using MATLAB ver. 7.1 to get the visual description of charged particle motion. The simulation program is made based on non relativistic Lorentz equation.  Each of charged particle’s position and velocity components, which is moved under external electric and or induction magnetic filed(s), is numerically computed using forth order Runge-Kutta method and be made visible by the simulation program. Proper test of the simulation program is made using known text book as the reference. Simulation results which made of 3D profile of charged particle’s motion path  and  each velocity components has already shown that it have good relationship with the known text book   Keywords : charged particle motion, position, velocity BERKALA FISIKA 2012-04-06 10:17:27 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3068 BERKALA FISIKA; Vol 10, No 2 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2795 2012-03-29T12:54:17Z berkala_fisika:RA

nmb a2200000Iu 4500 "120329 2012 eng " 1410-9662 dc ANALISIS MEDAN LISTRIK PADA PLASMA KORONA DENGAN KONFIGURASI CINCIN BIDANG Wardaya, Asep Yoyo Jurusan Fisika, Universitas Diponegoro Semarang Nur, Muhammad Jurusan Fisika, Universitas Diponegoro Semarang It has been studied efectivity of the electric field and density of current that have been determined by the physical criteria from a long size of cylinder and a radius of thin ring from the corona plasma generator with the plane ring electrode. The result of the calculation is indicate that the strong electrics field will be resulted by the configurations of the thin ring form, contiguity apart between the thin rings (minimum cylinder length) and the size of the thin ring radius which near of the size of external cylinder radius. The radial symmetrical of geometric form of the thin ring is causing it has not current density form at tip of the thin ring.   Key words : Plasma,  plane-ring, electric field, density of current. BERKALA FISIKA 2012-03-28 21:23:50 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2795 BERKALA FISIKA; Vol 13, No 4 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/70082 2025-01-08T09:17:37Z berkala_fisika:ART

nmb a2200000Iu 4500 "240117 2024 eng " 1410-9662 dc PENENTUAN NILAI SIGNAL TO NOISE RATIO PADA CITRA MAGNETIC RESONANCE IMAGING BERDASARKAN VARIASI TIME REPETITION TIME ECHO Arty, Nindy Fisika Medik, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Makassar, Indonesia, 90245. Dewang, Syamsir Fisika Medik, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Makassar, Indonesia, 90245. Astuty, Sri Dewi Fisika Medik, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Makassar, Indonesia, 90245. Rifaldi, Rifaldi Fisika Medik, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Makassar, Indonesia, 90245. Purwanto, Purwanto Instalasi Radiologi, RS dr. Wahidin Sudirohusodo, Makassar, Indonesia, 90245.. Time Repetition, Time Echo, Signal to noise ratio, Magnetic Resonance Imaging, fantom Sionil. Penelitian ini bertujuan untuk mengevaluasi citra fantom Sionil pesawat Magnetic Resonance Imaging (MRI) SIGNA Pioneer 3T berdasarkan variasi nilai Time Repetition (TR) dan Time Echo (TE). Parameter yang dianalisis berupa nilai citra obyek fantom berupa signal dan noise yang dibandingkan dengan daerah background sehingga diperoleh nilai signal-to-noise ratio (SNR). Fantom Sionil berbahan dasar dimethyl silicone fluid, gadolinium dan colorant. TR divariasikan pada 600, 1200, 1800, 2400, 3000, dan 3600 ms, sedangkan TE pada 60, 80, 100, dan 120 ms. Tebal irisan 4 mm serta jarak antar irisan 0,4 mm dari dasar fantom. Hasil yang diperoleh menunjukkan bahwa nilai TE dan TR untuk setiap pengamatan berbeda dengan nilai konfigurasi, tetapi menghasilkan nilai signal maupun noise yang relatif konstan pada setiap pengulangan dengan faktor yang sama. Untuk menghasilkan SNR terbaik, nilai TR yang lebih tinggi dan nilai TE yang lebih rendah harus dioptimalkan. Pemilihan TR yang cukup tinggi untuk pemulihan signal maksimal tanpa memperpanjang waktu pemindaian secara signifikan, dan TE yang cukup pendek untuk mengurangi noise dan degradasi signal. BERKALA FISIKA 2024-01-20 16:27:18 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/70082 BERKALA FISIKA; Vol 27, No 1 (2024): Berkala Fisika eng Copyright (c) 2025 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/9380 2015-11-05T08:34:34Z berkala_fisika:RA

nmb a2200000Iu 4500 "150102 2015 eng " 1410-9662 dc STUDI KOMPARASI METODE PERCENTAGE DEPTH DOSE (PDD) DAN TISSUE PHANTOM RATIO (TPR) UNTUK MENENTUKAN INDEK KUALITAS BERKAS ENERGI 6 MV DAN 10 MV PADA PESAWAT LINAC Laksono, Muharam Budi Instalasi Radiologi, Rumah Sakit Umum Daerah Majalengka Wardaya, Susila Instalasi Radioterapi, Rumah Sakit Umum Hasan Sadikin, Bandung Budi, Wahyu Setia Jurusan Fisika, Universitas Diponegoro, Semarang Hidayanto, Eko Jurusan Fisika, Universitas Diponegoro, Semarang PDD, TPR, photon and index beam quality. Patient dose in the linac determined with source surface distance (SSD) technique using percentage depth dose (PDD) method and source axis distance (SAD) technique using tissue phantom ratio (TPR) method. Beam quality index is the concept of beam penetration in the water which can be quantized so get a measurable constant. In medical accelerator determined index beam quality    using TPR20,10 to do with counting of PDD20,10 or PDD(10)Research has been carried out by comparing the method PDD and TPR to determine index beam quality of  photon energy 6 MV and 10 MV on the linac. Measurements performed on the PDD method SSD 100 cm and TPR on the SAD 100 cm  with standard field 10 cm x 10 cm. PDD and percent TPR pattern is similar to the built-up area, after dmax will be different. The results of  index beam quality TPR20,10 photon energy 6 MV with a relative measurement 0.660416413 and absolute measurement 0.681884058 at 10 MV photon energies obtained relative measurement 0.73752495 and absolute measurement 0.72896543. Calculation TPR20,10 to PDD20,10 and TPR20,10 for PDD (10) of the relative and absolute measurement of the photon energy 6 MV and 10 MV obtained small deviations of less than 1%. Keywords: PDD, TPR, photon and index beam quality. BERKALA FISIKA 2015-11-05 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/9380 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 1 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3084 2012-04-07T12:33:55Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pereduksian COX, NOX, SOX, HC dari Kendaraan Bermotor dengan Menggunakan Plasma Non-Termik Nur, Muhammad 1). Pusat Studi Aplikasi Radiasi dan Rekayasa Bahan, Lembaga Penelitian Universitas Diponegoro 2). Devisi Aplikasi Plasma, Laboratorium Fisika Atom dan Nuklir Jurusan Fisika FMIPA Universitas Diponegoro Semarang Wirawan, Bukit Yuta Devisi Aplikasi Plasma, Laboratorium Fisika Atom dan Nuklir Jurusan Fisika FMIPA Universitas Diponegoro Semarang Adi Wijaya, Wahyu Devisi Aplikasi Plasma, Laboratorium Fisika Atom dan Nuklir Jurusan Fisika FMIPA Universitas Diponegoro Semarang Suseno, Ahmad Laboratorium Kimia Fisika, Jurusan Kimia FMIPA Universitas Diponegoro Semarang Sumariyah, Sumariyah 1). Pusat Studi Aplikasi Radiasi dan Rekayasa Bahan, Lembaga Penelitian Universitas Diponegoro 3). Laboratorium Instrumentasi dan Elektronika Jurusan Fisika FMIPA Universitas Diponegoro Semarang Reduction NOX gas from motor vehicle 1486 cc emission have been done by using corona glow discharge plasma which awakened with power source from modified system ignition of car.NOX Gas is result emission of motor vehicle 1486 cc at 2000 rpm. Flow NOX source are joined with reactor. Corona glow discharge plasma awakened in the reactor with knife to plane electrode geometry configuration with power source from modified system ignition of car. Corona that happened in reactor which containing of motor vehicle gas emission 1496 cc will yield ion, electron, and energetic radical. NOX will turn into compounds which do not dangerous and it’s indicate that pollutants in reactor was reduced.  To get the decomposition efficiency of NOX it’s require to be done the measurement of concentration of NOX before and after reduced. The biggest decomposition efficiency of NOX which obtained in this research is 81.38 % at distributor rotation equal to 1500 rpm with current equal to 80µA. Anion and cation analysis show there are cation NH4+ and anion CO32-, SO32-, and SO42-, that giving hypothesize that one of compiler compound of crust result of system prototype to reduce NOX are ammonium carbonate ((NH4)2CO3), ammonium sulfide ((NH4)2SO3), and ammonium sulphate ((NH4)2SO4). BERKALA FISIKA 2012-04-06 10:20:46 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3084 BERKALA FISIKA; Vol 9, No 4 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2868 2012-03-29T15:28:20Z berkala_fisika:EDT

nmb a2200000Iu 4500 1410-9662 dc Cover April 2009 April 2009, Cover Cover Berkala Fisika, Vol. 12, No. 2, April 2009 BERKALA FISIKA 2012-03-29 09:48:12 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2868 BERKALA FISIKA; Vol 12, No 2 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/10837 2016-04-21T12:15:53Z berkala_fisika:RA

nmb a2200000Iu 4500 "150701 2015 eng " 1410-9662 dc STUDY OF ELECTROOPTICS BEHAVIOUR OF NAPHTHALENE AND ANTHRACENE Firdausi, K Sofjan Jurusan Fisika, Universitas Diponegoro, Semarang Khumaeni, Ali Jurusan Fisika, Universitas Diponegoro, Semarang Richardina, Very Jurusan Fisika, Universitas Diponegoro, Semarang Arianto, Fajar Jurusan Fisika, Universitas Diponegoro, Semarang Budi, Wahyu Setia Jurusan Fisika, Universitas Diponegoro, Semarang electro-optics, polarization, naphthalene, anthracene, Van der Waals potential energy In this paper, we demonstrate electro-optics behaviour of naphthalene and anthracene using change of polarization of sample induced by external electric field. The source of light for polarization was 1 mW-he-ne Laser 633 nm. The induced external Electric field was produced by high DC voltage 0 – 7 kV. The samples were diluted in solutions-form using wash-benzene. The result shows that anthracene has higher polarizability than naphthalene, which is indicated by higher change of polarization in anthracene than naphthalene. The Assumption that potential difference is proportional to the distance between molecules is shown qualitatively by graphs of Van der Waals potential energy or force between molecules. In this case, anthracene has higher level Energy than naphthalene so that it can be used in visible excitation for environmental spectroscopy. Keywords: electro-optics, polarization, naphthalene, anthracene, Van der Waals potential energy  BERKALA FISIKA 2016-04-21 11:48:02 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/10837 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 3 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3101 2012-04-07T12:40:37Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc KAJIAN AWAL SIFAT OPTIS TAKLINIER BAHAN TRANSPARAN DALAM MEDAN LISTRIK STATIS Prabowo, Krisno Jurusan Fisika FMIPA UNDIP, Semarang Firdausi, K. Sofjan Jurusan Fisika FMIPA UNDIP, Semarang Azam, Much. Jurusan Fisika FMIPA UNDIP, Semarang In this paper, we study non linear optical characteristics of some transparency media in a static external electric field, E. The samples used in this experiment are mineral water, salt solution, and sugar solution. The optical characteristic investigated here is the change of polarization angle,b, of laser He-Ne after pass through the sample, against E. The strength of electric field is produced by high voltage (0-2000 volt) applied on two parallel plates (size 28 × 28 cm2). It is assumed that E inside the plates is homogeneous and fulfilled by relation of E = V/d. Results of experiment show that three samples have the tendency of b µ E in this experimental condition assumed to be optimal. For weak (mineral water) and strong (salt solution) electrolyte solution, we obtain a significant difference of gradient, that shows how dominant the electric dipoles in salt more than in mineral water. Other wise, change of b vs. E in sugar solution has only significant initial value of b. The tendency of b µ E is just only due to the contribution of dipoles of water molecules in sugar solution, since the sugar molecules is non polar. BERKALA FISIKA 2012-04-06 10:20:14 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3101 BERKALA FISIKA; Vol 9, No 1 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2925 2012-03-30T14:33:16Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Koreksi Tekanan Gas Ideal untuk Plasma sebagai Materi Fase ke empat dan Penerapannya pada plasma Argon Nur, Muhammad Laboratorium Fisika Atom dan Nuklir, Jurusan Fisika, Fakulas Matematika dan Ilmu Pengetahuan Alam Pehitungan secara analitik telah dilakukan untuk memperoleh perumusan tekanan pada plasma. Perhitungan dengan pendekatan non kuantum ini megunakan fungsi-fungsi termodinamika dalam gas seperti entropi, entalpi, energi bebas  Helmholtz, energi bebas Gibs dan fungsi-fungsi partisi partikel dalam Plasma. Perumusan yang diperoleh digunakan untuk menentukan tekanan pada plasma korona Argon densitas tinggi dan plasma Argon gelombang  mikro pada tekanan gas awal 1 atmosfer. Hasil pehitungan tekanan diperoleh perbedaan dantara tekanan gas panas dengan tekanan kondisi plasma sebesar ΔPplasma1/24π Pgas dimana tekanan pada kondisi plasma lebih kecil dari tekanan gas panas. Penerapan terhadap plasma korona argon densitas tinggi, ditemukan bahwa tekanan plasma berubah secara parabolik terhadap perubahan densitas dan tekanan plasma berubah secara linear terhadap temperatur.   Key words:Plasma. gas panas, tekanan, termodinamika, energi bebas, argon, densitas, temperatur BERKALA FISIKA 2012-03-29 14:54:02 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2925 BERKALA FISIKA; Vol 12, No 4 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/23852 2019-06-25T13:47:00Z berkala_fisika:RA

nmb a2200000Iu 4500 "190624 2019 eng " 1410-9662 dc PENGUKURAN PERMITIVITAS KOMPLEKS MATERIAL MAGNETIK MENGGUNAKAN METODE S-PARAMETER DENGAN PENDEKATAN NICOLSON ROSE-WEIR Priyono, Priyono Program studi D3 Instrumentasi, Sekolah Vokasi, Universitas Diponegoro Abidin, Nur Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Nurhasanah, Iis Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Ferromagnetic, S-parameter, complek permittivity Dielectric properties of material are important properties because it describes the interaction of material with electromagnetic waves. The complex permittivity value of material is interesting because it can represent on how much energy savings and dissipation when the material gets exposed to electromagnetic waves. The aim of this paper was to determine complex permittivity by Nicolson-Ross-Weir (NWR) method. The NWR method was based on the phenomenon of reflection and transmission of electromagnetic wave that drip on materials. The values of the reflection coefficient () and the transmission coefficient (T) were derived from reflection (S11) and transmission (S12) parameters. Determination of real permittivity in the frequency range of 10 GHz to 15 GHz of BaFe12O19 material was ε ’ = 4.36 and ε ” = 6.23. The second sample was BaFe9 (MnCo)1,5Ti1,5O19, the values of ε ’ = 5.49, while ε ” = 9.35. From the two test materials, it was revealed that in the frequency range of 10 GHz to 15 GHz, absorption did not occur in BaFe12O19, while in BaFe9 (MnCo)1.5Ti1,5O19 absorption occured at 13.0 GHz. Keywords: Ferromagnetic, S-parameter, complek permittivity BERKALA FISIKA 2019-06-24 11:44:36 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/23852 BERKALA FISIKA; Vol 22, No 2 (2019): Berkala Fisika Vol. 22 No. 2 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4979 2013-05-27T11:13:48Z berkala_fisika:RA

nmb a2200000Iu 4500 "120101 2012 eng " 1410-9662 dc ANALISA DATA CURAH HUJAN STASIUN KLIMATOLOGI SEMARANG DENGAN MODEL JARINGAN SYARAF TIRUAN Arif, F M Laboratorium Geofisika, Jurusan Fisika, Universitas Diponegoro Gernowo, Rahmat Laboratorium Geofisika, Jurusan Fisika, Universitas Diponegoro Setyawan, Agus Laboratorium Geofisika, Jurusan Fisika, Universitas Diponegoro Febrianty, D Badan Meteorologi Klimatologi dan Geofisika Jawa Tengah The major purpose of this research was to applying artificial neural network to predicting rainfall in Semarang climatology station and occurs its accuration. One ofartificial neural network method is back propagation artificial neural network. Withheuristic technique its optimizing to train algorithmic faster and improving net works. Weused rainfall data in 2000-2009 from Semarang climatology station. Artificial neuralnetwork modelling planned in MATLAB R2008b programme. The best model or net viewsfrom correlation level between net’s output, observation data and RMSE point whichproduced by the net. The results shown the best network has 5 neurons in input’s layer, 10in hidden layer and 1 neuron in output layer. Its performance has learning data 66,7%,testing data 33,3%, learning rate 0,7 and momentum 0,4 which has correlated around70,72% to observation data with RMSE point 141,55. The best network will use topredicting rainfalls in 2010, its correlation is 88,43% and its RMSE points is 83,76 tillJuly. Its better than what BMKG has which only reach 84,63% correlation points and87,21 RMSE points. Keywords:  Artificial neural network, optimizing, correlation, RMSE BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4979 BERKALA FISIKA; Vol 15, No 1 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2964 2012-04-03T11:49:02Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Rancang Bangun Pengatur Cermin Sebagai Komponen Gerak Interferometer Pada Spektroskopi FTIR Adi Wibowo, Wahyu Jurusan Fisika Universitas Diponegoro Edi Widodo, Catur Jurusan Fisika Universitas Diponegoro Azam, M. Jurusan Fisika Universitas Diponegoro Firdausi, K. Sofjan Jurusan Fisika Universitas Diponegoro Michelson's interferometer and mirror regulator system as components of its power have been designed. Interferometers stirred component is one of monotonic mirror on optic system. Interferometer is made accords Michelson's Interferometer attempt. Mirror M1 and mirror M2 is assembled mutually upright then one beam splitter placed before both of mirror. One laser light source is given before mirror M1 crosses beam splitter. There is a detector before mirror M2 crosses beam   splitter upright with laser light source. Mirror M1 is made flexible by assembled gear and stepper's motor to be able forward or backward motion then so called moveable mirror.  Stepper's motor is turned around by computer via parallel port. From interferometer engineering and mirror regulator system already been made, gotten interference pattern with ring amount that the less each mirror gets forward motion and ring amount that more and more each mirror moves to backward. Shift moveable mirror every step for forward or backward is 1,5 µm with distance sails through maximal be 6,0 mm. The in common result point out that interferometer and regulator system of moveable mirror show feature changed interference pattern along with mirror move. Key word: interferometer, moveable mirror, motor stepper, parallel port. BERKALA FISIKA 2012-03-30 15:00:48 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2964 BERKALA FISIKA; Vol 11, No 3 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/4990 2013-05-27T16:03:07Z berkala_fisika:RA

nmb a2200000Iu 4500 "120701 2012 eng " 1410-9662 dc MODEL ARIMA UNTUK PREDIKSI CURAH HUJAN STUDI KASUS SEMARANG JATENG A Rofik, Muchammad Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Diponegoro Gernowo, Rahmat Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Diponegoro Setyawan, Agus Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Diponegoro Nursamsiah, Nursamsiah Badan Meteorologi Klimatologi Geofisika (BMKG) Jawa Tengah Modeling and prediction of rainfall in 2010 in Central Java BMKG Climatological Station has been done with ARIMA approach. The goal is to determine the historical pattern of the dataand then extrapolates this pattern into the future based on the assumption of continuity. Rainfalldata of 2000-2009 is a time series that can be predicted into the future using ARIMA. In thisstudy using two approaches for prediction of rainfall in 2010. The results were correlated with aprediction of rainfall data observed in 2010. Obtained a correlation of 71.1% and 75.48%. Keywords: ARIMA, rainfall, predictions, models BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4990 BERKALA FISIKA; Vol 15, No 3 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2982 2012-04-03T15:26:15Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Studi Pengaruh Medan Radio Frekuensi (RF) pada Minyak Goreng Firdausi, K. Sofjan Laboratorium Optoelektronik dan Laser, Jurusan Fisika FMIPA UNDIP Istianah, Istianah Laboratorium Optoelektronik dan Laser, Jurusan Fisika FMIPA UNDIP Marhaendrajaya, Indras Laboratorium Optoelektronik dan Laser, Jurusan Fisika FMIPA UNDIP A study of non linier optic has been carried out for palm oil induced by RF frequency field,e using white light and laser light. The e’s value is produced by RF generator with 2kV of voltage and in the range of frequency between 6.04 MHz and 11 MHz. In this research, he-ne laser with 632.8 nm of wavelength, green pointer laser with 532 nm of wavelength and white light of halogen with maximum power 130, are used as source of light. The physical characteristics observed in the experiment are change of light polarization that is transmitted through palm oil. From experiment result indicates that the change of polarization angle is not linearly dependent on e, At the same condition, the highest changes of polarization angle takes place when providing green laser, upright position of RF frequency field on polarization angle direction  900 for the twice used-palm oil. Keywords: non – linier optics, polarization angle, RF frequency field BERKALA FISIKA 2012-04-03 11:53:14 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2982 BERKALA FISIKA; Vol 11, No 1 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/34356 2020-11-26T09:46:54Z berkala_fisika:EDT

nmb a2200000Iu 4500 "201122 2020 eng " 1410-9662 dc SKEPTIS DALAM SAINS Nur, Muhammad Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang “For my first work-related tweet of 2020, I am  totally  bummed  to  announce  that  we have  retracted  last  year's  paper  on enzymatic  synthesis  of  beta-lactams.  The work  has  not  been  reproducible.”  Itulah tweet dari peraih hadiah Nobel 2018 bidang Kimia.  Dia  harus  mengumumkan  sesuatu yang  mungkin  tak  disangka  sebelumnya. Ahli sekaliber Frances H. Arnold terpaksa mengumumkan  bahwa  sintesis  enzimatik beta-laktam  (enzymatic  synthesis  of  beta- lactams)  belum  dapat  direproduksi (diulangi). BERKALA FISIKA 2020-11-22 17:41:26 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/34356 BERKALA FISIKA; Vol 23, No 3 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5006 2013-05-27T16:22:11Z berkala_fisika:RA

nmb a2200000Iu 4500 "110701 2011 eng " 1410-9662 dc MASSA KLASIK SOLITON PERSAMAAN SCHRÖDINGER NONLINEAR Prayitno, T. B. Jurusan Fisika, Fakultas MIPA, Universitas Negeri Jakarta We have calculated classical mass of soliton of nonlinear Schrödinger equation in thecase of (1+1) space-time dimension. The equation describes the propagation of electromagneticwave in combination of dispersive-nonlinear medium. The propagation itself will create a stableelectromagnetic pulse. The first thing that must be done is to calculate analytical solution of onesoliton of nonlinear Schrödinger equation by transforming wave function and continuing byapplying direct integration. The definition of its classical mass is based on classical field theory bybeginning the construction of Lagrangian density and continuing Hamiltonian density of thatnonlinear equation. The Lagrangian density is obtained by trial function relating by Euler Lagrange that creates appropriate nonlinear Schrödinger equation. Keywords:Soliton,Nonlinear Schrödinger. BERKALA FISIKA 2013-05-27 13:55:05 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5006 BERKALA FISIKA; Vol 14, No 3 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3029 2012-04-05T15:01:55Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Kajian Efisiensi Energi Proses Penyulingan Dan Sifat Fisik Hasil Penyulingan Minyak Serai Dapur Menggunakan Tungku Sekam Dan Heating Mantel Rohaeti, E. Departemen Kimia, FMIPA IPB, Kampus Dramaga, Gedung Wing S Bogor, Indonesia-16680 Pamungkas, N. G. Departemen Kimia, FMIPA IPB, Kampus Dramaga, Gedung Wing S Bogor, Indonesia-16680 Irzaman, Irzaman Departemen Fisika, FMIPA IPB, Kampus Dramaga, Gedung Wing S Bogor, Indonesia-16680 Essential oil distillation has been carried out from the lemongrass material using two heaters there are rice husk and heating mantel. In comparison ingredients (lemongrass: water = 0.125 kg: 0.5 liters) distillation with rice husk heater requires energy 6022.5 kcal, 3660 second distillation time, costs Rp 912.5 with an average rendemen of oil produced 0.0635 %. Distillation with the same material amount using heating mantel requires the energy 832.143 Kcal, distillation time 6990 seconds, the cost Rp 608.6 and producing the rendemen 0.114%. Distillate debit is influenced by the heat generated which produced by the rice husk and heating mantel. The quality of lemongrass oil which produced by the rice husk heating is better than the heating mantel in term of the lemongrass oil color and oil refractive index. Lemongrass oil which is produced by the pale brown of heating rice husk and refractive index values were in the range of 1.4830 to 1.4890. Keywords: rice husk, heating mantel, distillation, lemongrass oil, energy. BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3029 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/39825 2021-07-05T11:38:49Z berkala_fisika:ART

nmb a2200000Iu 4500 "210705 2021 eng " 1410-9662 dc IMPLEMENTASI METODE CONTRAST LIMITED ADAPTIVE HISTOGRAM EQUALIZATION DAN LAPLACIAN OF GAUSSIAN FILTER UNTUK PENINGKATAN KONTRAS CITRA CT Awwalin, Aufi Rizqiatul Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Setiawati, Evi Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Anam, Choirul Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Image quality improvement, CLAHE, Laplacian of Gaussian filter, MSE, PSNR, spatial resolution The  image  obtained  from  the  CT  scanner  has  a  relatively  low  contrast.  Image  contrast  can  be enhanced  by  using  an  algorithm  of  contrast  limited  adaptive  histogram  equalization  (CLAHE). However, the implementation of CLAHE causes an increase  of noise. Furthermore, noise can be reduced  using  a  noise  reduction  filter,  but  it  reduces  the  spatial  resolution  of  the  image.  This study proposed a combination of the CLAHE method and the Laplacian of Gaussian (LoG) filter noise reduction algorithm to obtain images with high contrast,  while maintaining the  noise and spatial  resolution.  In  this  study,  27  abdominal  CT  images  and  MTF  phantom  CT  images  were investigated using our proposed method. As a comparison, this study also evaluated the results of combination  of  CLAHE  and  Gaussian  filters.  Evaluation  of  the  results  of  image  quality improvement  was carried out qualitatively (visually) and quantitatively by calculating the mean squared  error  (MSE),  peak-signal  to  noise  ratio  (PSNR)  and  spatial  resolution  using  a modulation transfer function (MTF) of 10%. The results of this study qualitatively (visually) and quantitatively showed that the combination of CLAHE and LoG filters produces images with high contrast,  while  maintaining the  noise  and  the  spatial  resolution  of  the  image.  Compared  to  the combination of  CLAHE and Gaussian filters or CLAHE alone,  the  combination of CLAHE and Log  filters  provides less  noise  and  higher  spatial  resolution.  Thus,  combination  of  CLAHE  and LoG filters can be used as an alternative algorithm to increase the contrast in CT images. BERKALA FISIKA 2021-07-05 11:38:49 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/39825 BERKALA FISIKA; Vol 24, No 1 (2021): Berkala Fisika eng Copyright (c) 2021 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5262 2013-08-01T09:45:32Z berkala_fisika:RA

nmb a2200000Iu 4500 "130701 2013 eng " 1410-9662 dc PENDUGAAN MODEL ANOMALI MAGNETIK BAWAH PERMUKAAN DESA DARMAKRADENAN, KECAMATAN AJIBARANG, KABUPATEN BANYUMAS Sehah, Sehah Program Studi Fisika, Fakultas Sains dan Teknik, Universitas Jenderal Soedirman Jalan dr. Suparno No. 61 Purwokerto Raharjo, SUkmaji Anom Program Studi Fisika, Fakultas Sains dan Teknik, Universitas Jenderal Soedirman Jalan dr. Suparno No. 61 Purwokerto Magnetic survey has been carried out to estimate the subsurface magnetic anomaly model inDarmakradenan Village, Ajibarang District, Banyumas Regency. After the data processing whichincludes some corrections and reductions, then obtained the residual magnetic anomaly data in theresearch area. Then this magnetic anomaly data was modeled use Mag2DC for Windows software,thus obtained four subsurface anomalous objects, which are interpreted as coarse grained sandstones, conglomerates, and andesitic breccias from Tapak Formation (χ = 0.0055 cgs units), lava depositionof Slamet Volcano; with boulder of basaltic-andesite from old Slamet Volcano eruption (χ = 0.0175 cgs units), andesitic sandstone, tuff conglomerate, and marl which insert of sandstone from HalangFormation (χ = 0.0015 cgs units), and limestones from Tapak Formation (χ = 0.0035 cgs units). The research areas have natural resources of limestone that is being cultivated mining now. While thepresence of gold minerals can not be determined, but is expected in the old alluvial deposits of TapakFormation and Halang Formation. Keywords: Magnetic anomaly, subsurface, Darmakradenan Village BERKALA FISIKA 2013-08-01 09:11:11 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5262 BERKALA FISIKA; Vol 16, No 3 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3046 2012-04-07T12:48:36Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Desain Model Pembelajaran Untuk Meningkatkan Kemampuan Pemecahan Masalah Dalam Pembelajaran IPA (Fisika) Sekolah Menengah Pertama Di Kota Bandung Taufik, Mohammad Jurusan Fisika FMIPA Universitas Padjadjaran Sukmadinata, Sukmadinata Program Studi Pengembangan Kurikulum SPs Universitas Pendidikan Indonesia Abdulhak, Ishak Program Studi Pengembangan Kurikulum SPs Universitas Pendidikan Indonesia Y. Tumbelaka, Bernard Jurusan Fisika FMIPA Universitas Padjadjaran Penelitian ini dilatarbelakangi oleh masih rendahnya literasi sains yang mencakup kerja ilmiah dan kemampuan pemecahan masalah khususnya pada mata palajaran IPA (Fisika). Melalui penelitian ini dikaji permasalahan yaitu bagaimana model pembelajaran yang dapat diterapkan untuk meningkatkan kemampuan pemecahan masalah dalam pembelajaran IPA (Fisika) di SMP. Tujuan penelitian adalah untuk mendesain model pembelajaran yang dapat diterapkan dalam meningkatkan kemampuan pemecahan masalah pada mata pelajaran IPA (Fisika) di SMP kelas VIII. Penelitian dilaksanakan di SMP di Kota Bandung menggunakan pendekatan research and development. Proses dilaksanakan melalui tahapan: studi pendahuluan untuk mendapatkan landasan pengembangan model dan pengembangan untuk mendapatkan model hipotetik melalui dua kali ujicoba. Berdasarkan penelitian ini diperoleh simpulan: Pertama, model pembelajaran Peningkatan Kemampuan Pemecahan Masalah (PKPM) dapat diterapkan pada mata pelajaran IPA (Fisika) di SMP kelas VIII dengan karakteristik materi pelajaran bersifat kontekstual dalam bentuk masalah yang harus dipecahkan melalui eksperimen. Metode pembelajaran yang digunakan menempatkan siswa sebagai subjek belajar serta guru sebagai fasilitator belajar. Interaksi pembelajaran dilaksanakan melalui tanya-jawab, penyelidikan/eksperimen, kolaboratif, dan latihan. Implementasi model meliputi: (1) Pendahuluan yang meliputi penjelasan singkat tentang tujuan dan proses pembelajaran, pengembangan suasana partisipatif, orientasi masalah kontekstual, dan pengorganisasian siswa; (2) Inti yang meliputi penyelidikan/eksperimen kolaboratif, penyajian hasil karya, pemberian penghargaan, dan latihan pemecahan masalah; serta (3) Penutup yang meliputi analisis dan evaluasi proses pemecahan masalah dalam bentuk refleksi serta rekonstruksi pemikiran dan aktivitas proses pembelajaran. Kedua, implementasi model pembelajaran PKPM merupakan salah satu upaya yang dapat digunakan untuk memperbaiki kualitas proses dan hasil pembelajaran IPA (Fisika) di SMP kelas VIII. Dampak penggunaan model tersebut antara lain: (1) Meningkatnya peran siswa dalam pembelajaran dan membuka peluang bagi siswa untuk melakukan kerja ilmiah; serta (2) Peningkatan kemampuan pemecahan masalah, penguasaan konsep, dan menumbuhkan kebiasaan berpikir dalam menyikapi masalah.   Kata kunci: Model Pembelajaran, Peningkatan Kemampuan Pemecahan Masalah, Konstruktivisme, Berpikir Reflektif. BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3046 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2882 2012-03-29T15:28:20Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Model Perhitungan Titik Gelombang Pecah (Point Breaker Wave) Disekitar Pantai Gernowo, Rahmat Jurusan Fisika, Fakultas MIPA Universitas Diponegoro Semarang In this paper will be studied numerically the point breaker wave characteristic on shore. The model equation of the surface wave based on the equations which is governed by combining the refraction-diffraction on mild slope bottom. As mathematical analysis approximation, the finite difference methods was us for understanding the characteristic behavior of the surface wave on shore. The numerical simulation is obtained from the result of the numerical computation. There are significance changes of the height of wave, which is influenced by mild slope bottom factor (shoaling), diffraction and refraction.           Key Word: Point Breaker Wave, finite difference, diffraction and reffraction. BERKALA FISIKA 2012-03-29 09:48:12 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2882 BERKALA FISIKA; Vol 12, No 2 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/50737 2022-12-06T10:03:02Z berkala_fisika:ART

nmb a2200000Iu 4500 "221206 2022 eng " 1410-9662 dc ANALISIS KELUARAN RADIASI DAN MEAN GLANDULAR DOSE BERDASARKAN KOMBINASI TARGET/FILTER PESAWAT MAMMOGRAFI DI RSUD SYEKH YUSUF GOWA Sari, Fenny Rahmah Mahasiswa Program Sarjana, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Astuty, Sri Dewi Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Dewang, Syamsir Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Hikmawati, Hikmawati Instalasi Radiologi, Rumah Sakit Syekh Yusuf Gowa, Indonesia Mammografi, MGD, Target/filter, Uji Kesesuaian Telah dilakukan penelitian tentang analisis keluaran radiasi pada dua kombinasi target/ filter pesawat mammografi di Instalasi Radiologi RSUD Syekh Yusuf Gowa menggunakan detektor multimeter sinar-X Radcal. Penelitian ini bertujuan untuk mengukur parameter-parameter uji yang berkaitan dengan keluaran radiasi dari pesawat mammografi pada kombinasi target filter Mo/Mo dan Mo/Rh, kemudian menganalisis hasil yang didapatkan dengan membandingkan nilai lolos uji berdasarkan Perka BAPETEN No. 2 Tahun 2018. Parameter yang diuji terdiri atas akurasi tegangan, reproduksibilitas, linearitas keluaran radiasi, dan mean glandular dose. Hasil yang didapatkan yaitu persentase error maksimal untuk uji akurasi tegangan sebesar 3,9% pada mode Mo/Mo dan 4,4% pada mode Mo/Rh, uji linearitas keluaran radiasi dengan nilai CL sebesar 0,029 pada mode Mo/Mo dan 0,025 pada mode Mo/Rh, uji reproduksibilitas tegangan dengan nilai CV sebesar 0,0002 pada mode Mo/Mo dan Mo/Rh, uji reproduksibilitas keluaran radiasi dengan nilai CV sebesar 0,008 pada mode Mo/Mo dan Mo/Rh, uji mean glandular dose dengan nilai dosis maksimal diperoleh 2,176 mGy pada mode Mo/Mo dan 2,011 mGy pada mode Mo/Rh. Berdasarkan hasil yang diperoleh, keluaran radiasi pada dua target/filter pesawat Mammografi di Instalasi Radiologi RSUD Syekh Yusuf Gowa dalam kondisi baik karena masih berada di bawah batas lolos uji yang ditetapkan oleh BAPETEN. BERKALA FISIKA 2022-12-06 10:03:02 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/50737 BERKALA FISIKA; Vol 25, No 3 (2022): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/6579 2014-03-21T15:24:37Z berkala_fisika:RA

nmb a2200000Iu 4500 "140101 2014 eng " 1410-9662 dc Analisis Keseragaman Citra pada Pesawat Ultrasonografi (USG) Sudarsih, Kesawa 1 Program Studi Magister Ilmu Fisika, Universitas Diponegoro Semarang 2 Lab. Program Studi DIII Teknik Rontgen Stikes Widya Husada Semarang Setia Budi, Wahyu Lab. Optoelektronika dan Aplikasi Laser, FSM, Universitas Diponegoro Semarang Suryono, Suryono Lab.Instrumentasi dan Elektronika, FSM, Universitas Diponegoro Semarang The computer base system to determine uniformity of ultrasonography image quality has been developed at various attenuation(dB) and Time Gain Compensator (TGC).The equipment used in this study was 2-dimensional ultrasonic apparatus and multi-purpose multi-tissue phantom models 040GSE. Data collection was performed by scanning the phantom using a linear transducer with a frequency of 8 MHz. The mean and standard deviation of image density of it ROI calculated used computer base system then analyzed with trendline if the image density value in the range between mean and sd  it means image uniform. The result shows that the uniformity of the image is influenced the value of attenuation and TGC. This value increase proportional with increasing attenuation. For greater value of the TGC the uniformity tends downward. At 45-60 dB  obtained distribution image uniformity sd value is 0.20 and 0.28, and at minimum up to maximum TGC  obtained distribution image uniformity sd value is 0.33 and 0.48. This value can be used for quality assurance reference of USG equipment. Keyword : USG Equipment, Uniformity, Region of Interest, Digital Image Processing BERKALA FISIKA 2014-03-21 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/6579 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 1 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3063 2012-04-07T08:46:13Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc PEMODELAN ZONA SESAR OPAK DI DAERAH PLERET BANTUL YOGYAKARTA DENGAN METODE GRAVITASI Nurwidyanto, M. Irham Laboratorium Geofisika Jurusan Fisika FMIPA UNDIP. Dwi Indriana, Rina Laboratorium Geofisika Jurusan Fisika FMIPA UNDIP. Thaha Darwis, Zukhrufuddin Laboratorium Geofisika Jurusan Fisika FMIPA UNDIP. A gravity research was done in Pleret, Bantul, Yogyakart.It’s covering 55 measurements points. This research aims to estimated subsurface structure  fault zone of the area, correctly along Opak River’s. Type of Gravitymeter La Coste & Romberg G-1118 using electronics feedback system with accuracy 0.005 miligal was used to measure gravitational field. Interpretation result from kualitative and kuantitative  are  estimated the structure in the research area consist of tree layer that arre  limestone, breccia, and alluvial sediment and Opak sediment’s BERKALA FISIKA 2012-04-06 10:17:27 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3063 BERKALA FISIKA; Vol 10, No 2 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2767 2012-03-29T14:39:19Z berkala_fisika:RA

nmb a2200000Iu 4500 "120329 2012 eng " 1410-9662 dc Studi Peningkatan Output Modul Surya Dengan Menggunakan Reflektor Sidopekso, Satwiko Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta (UNJ) Jl. Pemuda No. 10, Rawamangun, Jakarta 13220 Febtiwiyanti, Anita Eka Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta (UNJ) Jl. Pemuda No. 10, Rawamangun, Jakarta 13220 Efforts to optimize the power output of solar modules using a mirror. In this study used 2 pieces of flat mirrors as solar reflectors mounted on the right and left of the solar module. Measurement is done by directing the position of solar modules in order to obtain optimum results with a corner reflector 50 0, 600, 700. Based on the measurement results, we obtained at maximum power cost solar modules using the corner reflector 600. The increase in power output compared to 92.7% without using a reflector.   Keywords:  reflector, solar module, output power BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2767 BERKALA FISIKA; Vol 13, No 3 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/60896 2023-12-22T02:44:55Z berkala_fisika:ART

nmb a2200000Iu 4500 "230731 2023 eng " 1410-9662 dc REVIEW PEMBENTUKAN MASSA NEUTRINO MELALUI MEKANISME SEESAW TIPE II Binu Soesanto, Qidir Maulana Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Firdausi, Ketut Sofjan Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro neutrino, mekanisme Seesaw Mekanisme Seesaw adalah salah satu mekanisme untuk memunculkan massa neutrino yang tidak tercakup  dalam  Model  Standar  fisika  partikel. Terdapat  tiga  tipe  pada  mekanisme  Seesaw,  yaitu tipe I, II, dan III. Dalam tulisan ini, kami membahas mengenai mekanime Seesaw tipe II. Pada tipe ini,  tiga  skalar  triplet  diperkenalkan.  Dengan  adanya  triplet  skalar  dan  nilai  harap  vakum  dari medan skalar baru ini, kami akan menjelaskan bahwa massa neutrino bisa terbentuk. BERKALA FISIKA 2023-12-17 10:05:13 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/60896 BERKALA FISIKA; Vol 26, No 2 (2023): Berkala Fisika eng Copyright (c) 2023 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/9294 2015-10-19T16:14:22Z berkala_fisika:RA

nmb a2200000Iu 4500 "141001 2014 eng " 1410-9662 dc PROTOTYPE GENERATOR MAGNET PERMANEN MENGGUNAKAN KUMPARAN STATOR GANDA Hartono, Hartono Program Studi Fisika, Fakultas Sains dan Teknik, Universitas Jenderal Soedirman Sugito, Sugito Program Studi Fisika, Fakultas Sains dan Teknik, Universitas Jenderal Soedirman Wihantoro, Wihantoro Program Studi Fisika, Fakultas Sains dan Teknik, Universitas Jenderal Soedirman A permanent magnet generator has had been built using double stator coil.  Such coil was used to increase the electrical energy produced. This is apparently a type of single phase generator equipped by four permanent magnets of 2.5 cm in diameter and length each. Each of the four magnets has 4000 Gauss magnetic strength. The coil itself made from email wire of 0.12 mm in diameter and has 1200 turns. The performance of generator was tested on a rotor that turn by 300, 600, 900 and 1200 rpms each. The testing was performed on a condition with and without any load resistance. Testing result without load resistance showed the increase average output voltage about 83.95%, where the generator with load resistance has increase average output voltage about 62.65%. Keywords: generator, permanent magnet, double stator, increase the electrical energy BERKALA FISIKA 2015-10-19 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/9294 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 4 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3079 2012-04-07T12:31:48Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Interpretasi Data Seismik Refraksi Menggunakan Metode Reciprocal Hawkins dan Sofware SRIM (Studi Kasus Daerah Sioux Park, Rapid City, South Dakota, USA) Wahyuningrum, Sri Laboratorium Geofisika Jurusan Fisika Universitas Diponegoro Yulianto, Gatot Laboratorium Geofisika Jurusan Fisika Universitas Diponegoro Nurwidyanto, M. Irham Laboratorium Geofisika Jurusan Fisika Universitas Diponegoro Data processing of seismic refraction has been done. This data processing was the secondary data from seismic measurement result in the Sioux Park area, Rapid City, South Dakota, USA using EG refraction & G Geometrics Model ES-1210 seismic refraction instrument made in America with 12 geophones. The seismic refraction data processing was to determined the velocity and the deepness of eachs layer, and make geology under surface model then to interpreted the the data processing result using Reciprocal Hawkins method and SRIM software. On the seismic data processing used Reciprocal Hawkins method and SRIM (Seismic Refraction Inverse Modelling) software. Reciprocal Hawkins method used time depth concept and SRIM software used delay time concept. The time depth value or the delay time value was same with a half value of intercept time.The result from the data processing using Reciprocal Hawkins method was obtained threes layer, that are the seismic wave velocity of the first layer is 1013 ft/s, the second layer is 4007 ft/s and the third layer is 6887 ft/s. While the result of the deepness calculation obtained the deep of first layer range is 0,93 ft – 11,24 ft, the second layer ranging is 8,72 ft – 19,38 ft and from data processing the result using SRIM software obtained seismic wave velocity of the first layer is 970 ft/s, the second layer is 3485 ft/s and the third layer is 6150 ft/s, while the result of deepness calculation of the first layer range is 0,10 ft – 7,20 ft, the second layer range from 3,40 ft – 27,00 ft. From the under surface image model can be interpreted that the first layer is mouldy  layer which represent cover layer, the second layer is clay stone layer, sand ( dry, having the pass character) and third layer is napal stone at Spearfish formation which has impermeable characteristic or waterproof. Key words: delay time, intercept time, Reciprocal Hawkins method, seismic refraction BERKALA FISIKA 2012-04-06 10:20:46 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3079 BERKALA FISIKA; Vol 9, No 4 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2798 2012-03-29T12:02:12Z berkala_fisika:RA

nmb a2200000Iu 4500 "120329 2012 eng " 1410-9662 dc STUDY PENDAHULUAN SESAR OPAK DENGAN METODE GRAVITY (STUDY KASUS DAERAH SEKITAR KECAMATAN PLERET BANTUL) Nurwidyanto, M Irham Mahasiswa S-3 Ilmu fisika UGM dan staf Pengajar pada Jurusan Fisika FMIPA UNDIP. Brotopuspito, Kirbani Sri Dosen dan Peneliti pada Program Study Geofisika Jurusan Fisika FMIPA UGM Waluyo, Waluyo Dosen dan Peneliti pada Program Study Geofisika Jurusan Fisika FMIPA UGM Sismanto, Sismanto Dosen dan Peneliti pada Program Study Geofisika Jurusan Fisika FMIPA UGM The reconnaissance research to predict the position and the type of Opak Fault in surrounding subdistrict Pleret area was carryout by gravity method. It done by measured the intensity of gravity field. The measurement was done in five lines  cross the Opak Fault which indicated in the geological map. The intensity of gravity field  in the surround of subdistrict Pleret area are measured by la-coste Romberg  Gravitymeter,  the latitude are measured by GPS Trimble, and the position are measured by GPS Garmin III Plus. The measurement was done in five lines which separated abaut 2,5 km and about 20 km in length. The distance of observations are about 0,5 km to 1 km. The data which be collected are reduction by drift and tidal correction, free air correction, bouger correction and terrain correction. The corrected data are made bouger anomaly contour. The result of this research by kwalitative interpretation are estimated that  the location of Opak Fault in the eastern part of the position of Opak Fault which indicated in the geological map. The type of opak fault are normal fault, because can be detected by gravity method. Key words : Opak Fault, Pleret, gravity method.  BERKALA FISIKA 2012-03-29 06:14:46 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2798 BERKALA FISIKA; Vol 14, No 1 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/81650 2026-01-16T08:22:54Z berkala_fisika:ART

nmb a2200000Iu 4500 "260116 2026 eng " 1410-9662 dc KAJIAN LITERATUR PERKEMBANGAN NANOMATERIAL DITINJAU DARI SIFAT DAN APLIKASINYA Mukti, Nursanti Anjune Departemen Fisika Universitas Diponegoro Priyono, Priyono Departemen Fisika Universitas Diponegoro nanomaterial, sifat, karakteristik, preparasi, aplikasi nanomaterial Kajian  ini  menyajikan  studi  literatur  dari  perkembangan  nanomaterial  baik  berupa  definisi sejarah, tipe-tipe dimensi penyusun nanomaterial, sifat-sifat yang ada di dalam nanomaterial, karakteristik berupa morfologi dan ukuran partikel dengan menggunakan berbagai perangkat uji seperti SEM, TEM, dan lain sebaginya. Kajian ini juga menjelaskan beberapa metode yang dapat digunakan dalam preparasi nanomaterial baik anorganik dan organik, serta beberapa penerapan aplikasi dalam bidang nanomaterial dengan menggunakan material logam. Kajian ini  juga  juga  membahas  tentang  beberapa  struktur  material  nano  pada  0  Dimensi  (0-D),  1 dimensi  (1-D),  2  dimensi  (2-D),  dan  3  dimensi  (3-D),  beserta  beberapa  manfaat  dan aplikasinya. BERKALA FISIKA 2026-01-16 08:22:54 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/81650 BERKALA FISIKA; Vol 28, No 2 (2025): Berkala Fisika eng Copyright (c) 2026 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/9670 2015-12-08T10:01:49Z berkala_fisika:EDT

nmb a2200000Iu 4500 "150401 2015 eng " 1410-9662 dc Redaksional April 2015 Berkala Fisika, Tim Redaksi Jurusan Fisika Fakultas Sains dan Matematika Universitas Diponegoro Redaksional April 2015 BERKALA FISIKA 2015-12-08 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/9670 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 2 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3096 2012-04-07T12:38:45Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc PENENTUAN KONSENTRASI AKTIVITAS URANIUM DARI INDUSTRI FOSFAT MENGGUNAKAN DETEKTOR ZnS(Ag) Setiani, Indri Laboratorium Fisika Atom & Nuklir, Jurusan Fisika Fakultas MIPA UNDIP Munir, Mohammad Laboratorium Fisika Atom & Nuklir, Jurusan Fisika Fakultas MIPA UNDIP Firdausi, K. Sofjan Laboratorium Fisika Atom & Nuklir, Jurusan Fisika Fakultas MIPA UNDIP Bunawas, Bunawas Pusat Teknologi Keselamatan dan Metrologi Radiasi BATAN The activity concentration measurement of uranium (U238) in yellowcake sample which is coming from  phosphate fertilizer industry P.T. PETRO KIMIA Gresik  by using ZnS(Ag) detector has been done. In order to do this measurement, it is needed to callibrate and calculate the minimum detectable level of the detector. From the five samples that contain different yellowcake concentration, 400 mg of each samples were placed on five 2-inches-diameter stainless steel planchettes. HNO3 solution were added and the samples were shaken in order to make the samples as homogeneous as possible. The samples were totally evaporated under an infrared lamp until dry. Then they were counted by ZnS(Ag) detector. The uranium activity concentration measurement result of this method shows that sample with highest concentration of yellowcake (100%) have concentration activity 2,37 Bq/mg. While the sample with lowest concentration of yellowcake (37,5%) have concentration activity 0,95 Bq/mg. Key words     : uranium, phosphate fertilizer industry, ZnS(Ag) detector, yellowcake BERKALA FISIKA 2012-04-06 10:20:23 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3096 BERKALA FISIKA; Vol 9, No 2 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2897 2012-03-29T15:41:13Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Simulasi Pencitraan Ultrasonografi (USG) Menggunakan PdeTool Matlab Anam, Choirul Jurusan Fisika Fakultas MIPA UNDIP Diagnostic imaging with ultrasound is based on the mechanical properties of an object. To evaluate how the ultrasound wave propagates in an object and imaging of the object, can be done with simulation techniques. Simulation of ultrasound wave propagation was performed using Matlab pdetool. The simulation was conducted to determine the image quality due to the influence from variation of the object, variations in the number of objects, various types of objects and variations in frequency of the signal. From the simulation showed that the ellipse and box objects can be distinguished. If the number of object is increased, will cause the image more complex. This happens because the waves are about an object, it would interfere with ultrasound waves that will be used to image the next object. If two objects have different c is high enough, then the imagery on the field boundary of two mediums was very clear. Conversely, if the difference is very small c, then the boundary of two mediums were not visible. If the frequency rises, causing axial resolution increase, but cause increased attenuation.   Keywords: USG, Simulation, pdetool Matlab BERKALA FISIKA 2012-03-29 09:57:34 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2897 BERKALA FISIKA; Vol 12, No 3 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/23480 2019-06-25T13:51:34Z berkala_fisika:RA

nmb a2200000Iu 4500 "190529 2019 eng " 1410-9662 dc KORELASI POLARISASI ELEKTRO-OPTIS DENGAN KOMPOSISI ASAM LEMAK PADA MINYAK ZAITUN SEBAGAI METODE UJI ALTERNATIF MUTU MINYAK GORENG Nurhasanah, W Dewi Departemen Fisika Fakultas Sains dan Matematika Universitas Diponegoro Sugito, Heri Departemen Fisika Fakultas Sains dan Matematika Universitas Diponegoro Richardina, Very Departemen Fisika Fakultas Sains dan Matematika Universitas Diponegoro Azam, Much Departemen Fisika Fakultas Sains dan Matematika Universitas Diponegoro Firdausi, Ketut Sofjan Departemen Fisika Fakultas Sains dan Matematika Universitas Diponegoro Electro-optical polarization, olive oil, fatty acid composition, change in polarization angle In this study the quality of olive oil which has been degraded due to heating has been tested using the electro-optical transmission polarization method. The light source used was a laser pointer with λ = 650 nm. The degradation of the quality of olive oil was measured to be based on changes in the electro-optical polarization angle, while changes in the composition of fatty acids were tested using Gas Chromatography and Mass Spectroscopy (GCMS). The results showed that the polarization angle increases in second order polynomial on the increase in voltage and linearly on the heating duration in the sample which showed a decrease in the quality of homogeneous olive oil. Assuming that the polarization change is a linear combination of the main fatty acids from olive oil, it is obtained that C19:2 and C19:0 fatty acids are the most contributing to oil quality, that is, the reduction in oil quality is indicated by increasing polarization which is accompanied by an increase in C19:0 fatty acids and a reduction in C19:2 fatty acids. Whereas specifically for electro-optical polarization, in addition to C19:2 and C19:0 fatty acids, C19:1 also appears which slightly increases polarization by increasing the fatty acid. This method can be developed further for investigation into other vegetable oils, as well as evaluating halal oil due to contamination of lard. Keywords: Electro-optical polarization, olive oil, fatty acid composition, change in polarization angle BERKALA FISIKA 2019-05-29 10:45:06 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/23480 BERKALA FISIKA; Vol 22, No 1 (2019): Berkala Fisika Vol. 22 No. 1 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4974 2013-05-27T11:15:43Z berkala_fisika:RA

nmb a2200000Iu 4500 "111001 2011 eng " 1410-9662 dc PEMODELAN ANOMALI GRAVITASI SESAR DENGAN PENDEKATAN MODEL SHEET (MODELLING GRAVITY ANOMALIES OF FAULT BY SHEET MODEL APPROACH) Nurwidyanto, M Irham Jurusan Fisika FMIPA Universitas Diponegoro Setiawan, Ari Jurusan Fisika Universitas Gadjah Mada AbstractThe modelling gravity anomaly of fault model with a model sheet approach with the aim to study the response of gravity anomalies of faults was done.Modelling is done by modelling approaches bedding with a thickness t and density contrastwith surrounding Δρ. The  gravity anomaly at a point are formulated and  the calculation andvisualization program created in matlab8RS. From the modelling is made it can be concluded that the fault position is generally locatedbetween the gravity anomaly minimum and maximum gravity anomaly. When thetypes of fault arevertical normal fault then the fault position precisely located on the horizontal gradient  maximumvalue, whereas when the fault are not vertical, the location of fault are  to be near (around) themaximum horizontal gradient. Key words: modelling, gravity anomalies, faults, model sheets. BERKALA FISIKA 2013-05-25 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4974 BERKALA FISIKA; Vol 14, No 4 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2934 2012-03-30T15:03:09Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc PENGARUH FAKTOR EKSPOSI PADA PEMERIKASAAN ABDOMEN TERHADAP KUALITAS RADIOGRAF DAN PAPARAN RADIASI MENGGUNAKAN COMPUTED RADIOGRAPHY Fahmi, Arif Rumah Sakit Umum Daerah Firdausi, K. Sofjan Laboratorium Fisika Atom & Nuklir, Jurusan Fisika FMIPA UNDIP Setia Budi, Wahyu Laboratorium Fisika Atom & Nuklir, Jurusan Fisika FMIPA UNDIP It has been researched about the change of exposure factors in radiographic examination of abdomen to radiographic quality and radiation exposure using computed radiography. The change of exposure factors to radiographic quality is obtained by measurement of radiographic density, which transmitted to step wedges and phantom abdomen. The density difference of step wedge and abdomen at each change of exposure factors result in radiographic contrast. To obtain radiation dose for patients, it is accounted by analytic method. The affect of scattering rate dose is obtained by measurement of scattering exposure rate using survey meter with positioned 100 cm from the object. The result of experiment shows that change of exposure factors in radiographic examination of abdomen makes no significant difference between radiographic density and contrast; however, it has decreased the patient dose. Keywords: radiation exposure, radiographic density and contrast BERKALA FISIKA 2012-03-30 14:12:23 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2934 BERKALA FISIKA; Vol 11, No 4 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/27255 2020-06-08T13:09:22Z berkala_fisika:ART

nmb a2200000Iu 4500 "191212 2019 eng " 1410-9662 dc DESAIN DAN IMPLEMENTASI MESIN COMPUTER NUMERICAL CONTROL (CNC) BERBASIS ARDUINO SEBAGAI PLOTTER UNTUK MENGGAMBAR GARIS DAN BIDANG SEDERHANA Nugroho, Hafidz Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Sumariyah, Sumariyah Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang CNC, Cellular phone, Bluetooth, Blynk The aim of this research is to design and to implement a computer numerical control (CNC) machine using a cellular phone through bluetooth networks for drawing on a two-dimensional (2D) area of 40 mm x 40 mm. The machine consisted of several main parts, including DVD motor stepper, L293D, servo motor, HC-05, and cellular phone. The control was carried out by using the Blynk application that can be used in two modes, namely automatic (G-code based) and manual modes. The capability of the machine to draw test images were carried out, including linear motion, circular motion, up and down motion, displaying menu, rectangle shape, triangle shape, and circular shape. Results show that the CNC machine can move to draw images according to the commands given in each command mode. Keywords: CNC, Cellular phone, Bluetooth, Blynk BERKALA FISIKA 2019-12-12 08:25:35 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/27255 BERKALA FISIKA; Vol 22, No 4 (2019): Berkala Fisika Vol. 22 No. 4 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/2977 2012-04-03T12:34:51Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Review Studi Difraksi Fresnel Menggunakan Celah Bentuk Lingkaran Rosyidah, Arinar Jurusan Fisika, Universitas Diponegoro Semarang Marhaendrajaya, Indras Jurusan Fisika, Universitas Diponegoro Semarang Firduasi, K. Sofjan Jurusan Fisika, Universitas Diponegoro Semarang The Fresnel Diffraction has been reviewed to measure the wavelenght of monochromatic light sources. The change of circle fringe’s number is obtained by the change of the distance between source and slits, and the change of fringe’s radius. We used here the diode green pointer laser and red pointer laser as light sources with 1 mW in power. From the measurement, we obtained that the wavelenght of green laser and red pointer laser are still in the range of literature values. Key words: Fresnel diffraction, Fresnel zone. BERKALA FISIKA 2012-04-03 11:52:36 https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2977 BERKALA FISIKA; Vol 11, No 2 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/30622 2020-06-08T16:06:35Z berkala_fisika:ART

nmb a2200000Iu 4500 "200430 2020 eng " 1410-9662 dc ANALISIS NILAI COMPUTED TOMOGRAPHY DOSE INDEX (CTDI) PHANTOM KEPALA MENGGUNAKAN CT DOSE PROFILER DENGAN VARIASI PITCH Sari, Devi Artika Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Setiawati, Evi Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Arifin, Zaenal Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang CTDI, CTDIvol, pitch, CT dose profiler The purpose of this study was to measure the value of computed tomography dose index (CTDI) using the CT dose profiler, to compare the values of CTDI obtained in the five holes within the head of polymethil-methacrylate (PMMA) phantom, and to analyze the effect of pitch on CTDI values. The CTDI values were measured with the pitch variations of 0.562, 0.938, 1.375, and 1.750. The phantom was scanned with fixed parameters of 120 kVp, 200 mAs, 10 mm width collimation, 150 mm scan length, and 0.50 s tube rotation. Measurements were conducted at Kensaras hospital using the CT scannner of GE Optima CT580 16 slice. The results showed that if the pitch increases, the CTDI will decrease (< 25 mGy). The highest CTDI is 55,36 mGy and it is found on a pitch of 0,562 at upper hole of phantom (B position), and the lowest CTDI is 11,9 mGy and it is found a pitch of pitch 1,750 within a hole at three o’clock position (C position). If the pitch < 1, then the high CTDI is obtained (> 50 mGy) and it takes longer to scan. BERKALA FISIKA 2020-06-08 15:31:49 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/30622 BERKALA FISIKA; Vol 23, No 2 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5001 2013-05-27T15:53:10Z berkala_fisika:RA

nmb a2200000Iu 4500 "130101 2013 eng " 1410-9662 dc UPAYA PENINGKATAN KUALITAS CITRA MRI DENGAN PEMBERIAN MEDIA KONTRAS Suhardi, Suhardi Instalasi Radiologi, RS Tlogorejo, Semarang, Jawa Tengah Setiabudi, Wahyu Jurusan Fisika, Universitas Diponegoro, Semarang, Jawa Tengah Anam, Choirul Jurusan Fisika, Universitas Diponegoro, Semarang, Jawa Tengah Improvement the image quality of magnetic resonance imaging (MRI) carried out bycontrast media has been done. It was expected to obtain a better image quality so thatinterpretation of MRI images more valid. Contrast media were used gadolinium 5 mmol/10 ml perpatient. Number of patients 10 people with tumor of the head, and each uses a 6 slices. MRI usedAIRIS II with 0.3 Tesla magnetic field, Kodak Dry View 8900, densitometry, and Film. In thisstudy, the image resulted with and without contrast media were measured its density andcompared. It was resulted that the image density in normal  tissues no change, with and withoutcontrast media. While the tumor area with and without contrast media, the density decreased byan average of 0,56. The addition of contrast media, the presence of tumor will appear moreclearly. Keywords: Contrast Media, gadolinium, MRI BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5001 BERKALA FISIKA; Vol 16, No 1 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3001 2012-04-04T07:37:07Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Optimasi Prototipe Turbin Angin Menggunakan Metode Conjugate Gradient Bilalodin, Bilalodin Program Studi Fisika Jurusan MIPA Fakultas Sains dan Teknik Unsoed Jl. Dr. Soeparno No. 61 Kampus Unsoed Karangwangkal Telp/Fax (0281) 638793 Sugito, Sugito Program Studi Fisika Jurusan MIPA Fakultas Sains dan Teknik Unsoed Jl. Dr. Soeparno No. 61 Kampus Unsoed Karangwangkal Telp/Fax (0281) 638793 One of the principal issue of energy conversion from wind energy to electrical energy is the optimization of its conversion process. Energy conversion is called optimum if the power lost is  minimum. The condition can be attained at the development stage of a wind turbine prototype.  This research will determine the optimum value the  variables of  various operation condition by using  multivariables Conjugate Gradient (CG) optimization algorithm. It is found that the optimum value is attained at  H = 1,0 m and D = 0,6 m, hence minimum power lost. The performance of turbine prototype design at laboratory, showed that the turbine can testing at low and high wind speed and   the irrespective of wind direction condition.    Keywords :  optimalization, prototype, wind turbin, conjugate gradient   BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3001 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/34610 2020-11-30T08:57:49Z berkala_fisika:ART

nmb a2200000Iu 4500 "201126 2020 eng " 1410-9662 dc SISTEM OTOMATISASI DAN KENDALI JARAK JAUH LAMPU SMART HOUSE BERBASIS NODEMCU ESP8266 Ningrum, Febri Sintia Program Studi D3 Instrumentasi dan Elektronika, Sekolah Vokasi, Universitas Diponegoro, Semarang Triadyaksa, Pandji Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Internet of Things (IoT) is a concept that aims to expand the benefits of continuously connected internet connectivity. This research aims to utilize IoT on home remote control and automates systems that can be operated with a smart phone application via an internet connection (WiFi). This system used the NodeMCU ESP8266 module as a microcontroller, the light emitting diode (LDR)  sensor  as  an  automation  controller  for  lighting  the  environment  according  to environmental conditions, and the Blynk smartphone application as a remote controller. The process of controlling the lights can be done specifically on certain lights and can be controlled by  the  changes  of  environmental  light  in  the  morning  and  evening.  The  results  showed  that when the LDR sensor was poorly lit, the lamp would be ON and otherwise the lamp would be OFF when the LDR receives more light intensity. In addition, the Blynk application is able to control the lights when connected with internet and tested, in this research, up to 2.7 km. It can be concluded that as long as the system is connected to the WiFi in a stable and continuous manner,  then  this  control  system  can  perform  the  task  of  turning  on  and  off  the  lights independently when the owner is not at home. Keywords: Internet of Things (IoT), Blynk, LDR, Smart House, NodeMCU ESP6288  BERKALA FISIKA 2020-11-26 09:44:32 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/34610 BERKALA FISIKA; Vol 23, No 4 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5216 2013-07-31T09:01:55Z berkala_fisika:RA

nmb a2200000Iu 4500 "130401 2013 eng " 1410-9662 dc PENENTUAN DOSIS RADIASI EKSTERNAL PADA PEKERJA RADIASI DI RUANG PENYINARAN UNIT RADIOTERAPI RUMAH SAKIT DR.KARIADI SEMARANG Widyaningsih, Dewi Unit Radioterapi, Rumah Sakit dr. Kariadi Semarang Sutanto, Heri Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Application of nuclear technology is very usefull but it is very risk for human health andsafety, therefore necessary to control of radiation for humans and the environment. For it hasbeen done on the monitoring of external radiation dose to radiations workers in the examinationroom of radiotherapy unit Dr.Kariadi Semarang hospital. The study was conducted by measuringradiation dose rate of examianation room and operator’s room using Surveymeter and monitoringexternal radiation dose of radiation workers using alarm personal dosimeter Rados. The resultsshowed that the highest radiation dose rate is below the head source is equal to 20 μSv / h.External radiation dose in radiation workers every month on average 33.84 μSv, then for one yearis estimated to be 0.406 mSv. This value is within the allowable limit according to the dose limitvalue set by ICRP and BAPETEN which should not exceed 20 mSv a year.Keywords: external radiation dose, dose limit value, radiation protection. BERKALA FISIKA 2013-07-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5216 BERKALA FISIKA; Vol 16, No 2 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3041 2012-04-07T12:47:11Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Koreksi Gaya Berat Akibat Curah Hujan Pada Pengukuran Gaya Berat Mikro Antar-Waktu Lapangan Panas Bumi Kamojang 2006-2007 Zaenudin, Ahmad Jurusan Teknik Geofisika, FT Universitas Lampung Shallow groundwater level changes cause seasonal gravity anomaly. Changes in groundwater level is directly related to rainfall, when heavy rainfall, groundwater level rises rapidly and then declined gradually. Gravity anomaly due to the season is important to take into account noise. Changes in groundwater level due to rainfall is calculated using empirical equations, and the Gravity response calculated using the approach of an infinite Bouguer slab correction by entering the porosity factor. The rainy season in the Kamojang geothermal field occur between November to June and dry season between July to October. The highest rainfall in 24 hours occurred on December 8 by 75 mm. From the empirical calculations showed that changes in groundwater level due to rainfall period November 2006-June 2006 amounted to -1.502 m and July 2007-June 2006 amounted to +0.396 m. Based on the approach slab Bouguer corrected gravity anomaly not to cause inter-time respectively -18.89 and +5.98 mikrogal mikrogal for porosity of 30%. Changes in groundwater level is negative (a reduction of groundwater) caused gravity anomaly time inter-negative, and vice versa. Correction of the gravity anomaly due to inter-time rainfall should not be ignored because of the gravity anomaly at the time inter-geothermal field is usually small.   Key words: rainfall, groundwater level, inter-period gravity anomaly BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3041 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/46858 2022-06-13T14:40:23Z berkala_fisika:ART

nmb a2200000Iu 4500 "220613 2022 eng " 1410-9662 dc PENENTUAN MUTU MINYAK GORENG MENGGUNAKAN ANALISATOR DIGITAL U., Gema Nuran Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Sumariyah, Sumariyah Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Firdausi, K. Sofjan Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Sudut polarisasi, analisator digital, minyak goreng Berdasarkan  penelitian  yang  telah  dilakukan  sebelumya,  sifat  optis  atau  sudut  polarisasi  yang digunakan  sebagai  indikator  mutu  minyak  goreng  nilainya  relatif  sangat  kecil,  sehingga diperlukan  instrumen  analisator  yang  lebih  teliti  untuk  menghindari  kesalahan  paralaks  dan meningkatkan  efektivitas  dalam  pengukurannya.  Pada  penelitian  ini  telah  dilakukan  penentuan mutu  minyak  goreng  menggunakan  instrumen  analisator  digital  hasil  rancang  bangun.  Pusat pengendalian  dan  pemroses  data  instrument  ini  digunakan  mikrokontroler  ATMega  328P  dan Oled  sebagai  piranti  tampilan  sudut.  Hasil  uji  Analisator  Digital  dengan  panjang  gelombang laser sebesar 532 nm dan menggunakan Hukum Malus menghasilkan skala terkecil 0,1°. Untuk pengujian  pertama  dan  kedua  menggunakan  larutan  sukrosa  menghasilkan  linieritas  masing- masing 0,999 dan 0,997 . Adapun pada uji mutu minyak goreng, dapat dibedakan minyak  yang  sudah  kadaluarsa  dan  masih  layak  konsumsi  berdasarkan  nilai  rerata  perubahan sudut polarisasinya. BERKALA FISIKA 2022-06-13 14:40:23 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/46858 BERKALA FISIKA; Vol 25, No 1 (2022): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/6574 2014-03-21T15:21:34Z berkala_fisika:RA

nmb a2200000Iu 4500 "140101 2014 eng " 1410-9662 dc Analisis Produksi Ozon dalam Reaktor Dielectric Barrier Discharge Plasma (DBDP): Pengaruh Impedansi Elektroda Spiral Restiwijaya, Maryam Program Studi Magister Ilmu Fisika, Universitas Diponegoro Semarang Nur, Muhammad Jurusan Fisika, Universitas Diponegoro Semarang Winarni, Tri A Jurusan Teknologi Hasil Perikanan, Universitas Diponegoro Semarang Analysis of spiral-cylinder DBDP reactor on atmospheric pressure was done to explain spiral electrode impedance influence on ozone production. Variation of coil number (N): 10, 20, 30, 40, and 50 coil spiral applied to the spiral electrodes. Spiral electrode made of a copper wire with 0.4 mm in diameter and the inner and outer coils of each was 20 mm and 20.4 mm. Pyrex Tubing in diameter 3 cm and a thickness of 1 mm serves as a dielectric barrier cover spiral electrode. Cylindrical electrodes made from a copper plate with a length of 13.70 cm and thickness of 0.47 mm. a High voltage of AC has been used with a voltage up to 10 kV with frequency of 16 kHz. Free air supplied into the reactor with air flow rate of 6 L/minute. The results showed that at a constant N, ozone concentration decreased with the increasing value of the impedance (Z). Reactor DBDP most effective in terms of electricity consumption is on the DL = 20 mm, DK = 0.4 mm, and the number of coil N = 10 coils of wire with a power that is as high as 177.60 Watt and  Z=3,60x105Ω. Keywords : Number of coil, Spiral-cylinder electrodes, Ozone concentrations BERKALA FISIKA 2014-03-21 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/6574 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 1 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3058 2012-04-07T08:42:26Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pembuatan Hologram Refleksi Arifah, Arifah Jurusan Fisika Universitas diponegoro Firdausi, K. Sofjan Jurusan Fisika Universitas diponegoro Azam, M. Jurusan Fisika Universitas diponegoro A Reflection hologram of a white ceramic object has been made on 5000 lines/mm PFG-03M holographic plate. A He-Ne Laser is used to record the holograms. And to reconstruct, it is used white, blue, and yellow light. The holographic plate for making of reflection hologram is PFG-03M. The optimal exposure time lies between 8 and 10 seconds. By reconstruction image white LED, it shows that the image is formed clearer than using blue and yellow light.   Keywords:  holography, reflection hologram, reconstruction, exposure time.   BERKALA FISIKA 2012-04-06 10:17:20 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3058 BERKALA FISIKA; Vol 10, No 3 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2706 2012-03-29T15:32:53Z berkala_fisika:RA

nmb a2200000Iu 4500 "120329 2012 eng " 1410-9662 dc Efektivitas Polyvinyl Acetate (PVAc) Sebagai Matriks Pada Komposit Sampah Masturi, Masturi Fisika FMIPA Universitas Negeri Semarang Mikrajuddin, Mikrajuddin Fisika Institut Teknologi Bandung Khairurrijal, Khairurrijal Fisika Institut Teknologi Bandung It was fabricated a composite using solid waste as filler and polyvinyl acetate (PVAc) as matrice. This work is as a solution of more serious solid waste problems. The solid waste used is paper waste and leaf one with their composition are 60% and 40% respectively. The crushed-solid waste then hot-pressed at 100 MPa of pressure and 150°C of temperature. Then, the compressive strength of composite before and after PVAc presence was investigated to get a composition in which the compressive strength is optimum.   Keywords: composite, solid waste, polyvinyl acetate, compressive strength. BERKALA FISIKA 2012-03-28 21:38:25 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2706 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/60737 2023-12-17T10:05:13Z berkala_fisika:ART

nmb a2200000Iu 4500 "231217 2023 eng " 1410-9662 dc DETEKSI KANKER PARU MENGGUNAKAN SEGMENTASI CITRA CT- SCAN DENGAN ALGORITMA KLUSTER K-MEANS Tahier, Ahmad Ridho Hanifudin Program Studi Sarjana Terapan Teknologi Rekayasa Otomasi, Sekolah Vokasi, Universitas Diponegoro, Semarang 50275 Hariyanto, Aditya Prayugo Departemen Fisika, Fakultas Sains dan Analitika Data, Institut Teknologi Sepuluh Nopember, Sukolilo Surabaya 60111 Azam, Much Departemen Fisika, Universitas Diponegoro, Semarang 50275 Ccomputed Tomography, Thresholding Segmentation, K-means, breast cancer Imaging  technology  such  as  Computed  Tomography  (CT)  plays  an  important  role  in  producing high-resolution images.  CT makes it easy for an oncologist to diagnose patients for malignant and benign  tumors.  However,  the  technology  requires  image  engineering  techniques  to  make  the diagnosis  more  accurate.  The  technique  to  draw  that  is  segmentation.  Segmentation  plays  an important  role  to  distinguish  between  healthy  tissue,  benign  and  malignant  tumors.  There  are segmentation techniques based on mass density (pixel), contour (color) etc. This article will review and  explain  the  development  of  segmentation  techniques  specific  to  lung  cancer  images. Thresholding  segmentation  method  with  k-means  clustering  using  a  dataset  from  The  Cancer Imaging Archive (TCIA) named SPIEAAPM Lung CT Challenge dataset is performed in this study. The image data is divided into a number of k clusters that are mutually exclusive of each other. In CT  images  the  value  of  k  is  considered  as  2  as  there  are  2  regions,  one  is  lung  and  other  is background. This k-means clustering process will be done in two phases, the first phase k clusters will  be  formed  by  taking  each  pixel  intensity  value  to  the  nearest  centroid  by  calculating  the distance  between  pixel  intensity  values  to  each  centroid  using  different  distance  calculation methods.  The  segmentation  results  show  that  the  accuracy,  sensitivity  is  achieved  very  well  to differentiate and pinpoint the clusters. BERKALA FISIKA 2023-12-17 10:05:13 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/60737 BERKALA FISIKA; Vol 26, No 2 (2023): Berkala Fisika eng Copyright (c) 2023 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/8878 2015-08-01T18:11:16Z berkala_fisika:RA

nmb a2200000Iu 4500 "140701 2014 eng " 1410-9662 dc DETEKSI DINI KUALITAS MINYAK GORENG DAN STUDI AWAL TINGKAT KEHALALANNYA MENGGUNAKAN POLARISASI ALAMI Eva, Yulianti Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Indriyani, Y Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Husna, A Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Putri, N Kharisma Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Murni, Sri Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Amitasari, Ria Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Putranto, Ari Bawono Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Sugito, Heri Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Firdausi, K Sofjan Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro In this paper, we investigate natural light polarization for preliminary test of quality and authentication (halal) level of frying oil. Recently standard methods used are usually based on Indonesian National Standard (SNI), however all parameters are very difficult to be determined simultaneously. On the other hands even the test is time consumed, inexpensive, complicated and also preliminary treatments required, which is a major problem in era of rapid information need. One of an alternative solution is to use natural light polarization method. In the experiment, several vegetable frying oils and animal oils are used to be tested. The change of polarization angle is used to indicate the level of oil quality and its authentication. The result shows that higher polarization indicates lower oil quality relative to the others, which is in agreement to the previous study. This method is, not only, able to differentiate various edible vegetable oils, but also to distinguish edible oils and expired oils. More over, it has a prospect to indicate an authentication of oil that is a subject of a halal or not-halal case.This method is relative simply, not time consumed, conducted accurately without any previous treatments, and it provides a good prospect as a preliminary test for oil quality and its authentication. Keywords: Natural polarization, oil quality, halal or authentication level BERKALA FISIKA 2015-08-01 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/8878 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 3 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3074 2012-04-07T08:52:34Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Penentuan Kandungan Unsur Krom dalam Limbah Tekstil dengan Metode Analisis Pengaktifan Neutron Khaerani, Nina Laboratorium Fisika Atom dan Inti Jurusan Fisika FMIPA, Universitas Diponegoro Azam, Much. Laboratorium Fisika Atom dan Inti Jurusan Fisika FMIPA, Universitas Diponegoro Firdausi, K. Sofjan Laboratorium Fisika Atom dan Inti Jurusan Fisika FMIPA, Universitas Diponegoro Soeleman, Soeleman Badan Tenaga Nuklir Nasional Yogyakarta A determination of chromium which consisted in textile cesspool one of the company of textile residing in Ungaran using neutron activation analysis method.The sample has been threated in the form of sediment sample and liquid sample. The sample then an irradiated by Lazy Susan irradiation facility at Kartini reactor for six hours and then  the counting is done by HPGe detector for 300 seconds. The qualitative results shown that samples contents Cr-51. The quantitatively sediment sample chromium element rate equal to 491. 67 ppm and liquid sample chromium element rate equal  to 0.011  ppm Key words: Neutron Activation Analysis, irradiation. BERKALA FISIKA 2012-04-06 10:17:48 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3074 BERKALA FISIKA; Vol 10, No 1 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2820 2012-03-29T12:11:12Z berkala_fisika:EDT

nmb a2200000Iu 4500 1410-9662 dc Cover Edisi Khusus, Vol. 13, No. 2, April 2010 April 2010, Cover Edisi Khusus Cover Edisi Khusus, Vol. 13, No. 2, April 2010 BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2820 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/75299 2025-07-01T01:08:35Z berkala_fisika:ART

nmb a2200000Iu 4500 "250630 2025 eng " 1410-9662 dc PENGARUH SUHU KARBONISASI TERHADAP SIFAT FISIS DAN KIMIA KARBON AKTIF DAUN JERUK PURUT (CYTRUS HYSTRIX DC) UNTUK SEL SUPERKAPASITOR Madani, Husain Ahmad Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Makasar Armynah, Bidayatul Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Makasar Karbon Aktif, Biomassa, Kapasitansi, Daun Jeruk Purut, Superkapasitor. Superkapasitor atau Electrochemical Double Layer Capacitor (EDLC) adalah perangkat elektrokimia dengan rapat daya tinggi, siklus daya panjang, serta kemampuan pengisian dan pengosongan yang cepat. Penelitian ini berfokus pada pemanfaatan daun jeruk purut (Citrus hystrix DC) sebagai bahan karbon aktif untuk elektroda sel superkapasitor dengan kandungan lignoselulosa (hemiselulosa 28,40%, selulosa 25,60%, dan lignin 9,40%). Karbon aktif dihasilkan melalui aktivasi kimia menggunakan KOH 0,3M diikuti karbonisasi pada suhu 650°C, 700°C, dan 750°C dengan gas N₂, serta aktivasi fisika menggunakan gas CO₂ pada suhu 800°C. Hasil karakterisasi menunjukkan bahwa peningkatan suhu karbonisasi memengaruhi sifat fisis dan elektrokimia karbon aktif. Analisis FTIR menunjukkan degradasi gugus organik dan pembentukan struktur karbon berpori, sedangkan analisis XRD mengindikasikan transisi struktur kristalin menjadi amorf. Nilai massa jenis elektroda menurun seiring peningkatan suhu karbonisasi, memungkinkan terbentuknya pori-pori yang mendukung peningkatan kapasitansi. Hasil cyclic voltammetry menunjukkan kapasitansi spesifik tertinggi sebesar 107,75 F/g pada suhu karbonisasi 700°C, dibandingkan dengan 71,50 F/g dan 74,75 F/g masing-masing pada suhu 650°C dan 750°C. Penelitian ini membuktikan bahwa karbon aktif berbasis daun jeruk purut memiliki potensi tinggi sebagai elektroda sel superkapasitor, dengan suhu karbonisasi optimal pada 700°C. BERKALA FISIKA 2025-06-30 09:08:52 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/75299 BERKALA FISIKA; Vol 28, No 1 (2025): Berkala Fisika eng Copyright (c) 2025 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/9664 2015-12-08T10:01:58Z berkala_fisika:RA

nmb a2200000Iu 4500 "150401 2015 eng " 1410-9662 dc INTERPRETASI MODEL ANOMALI MAGNETIK BAWAH PERMUKAAN DI AREA PERTAMBANGAN EMAS RAKYAT DESA CIHONJE, KECAMATAN GUMELAR, KABUPATEN BANYUMAS Sehah, Sehah Jurusan Fisika, Fakultas MIPA, UNSOED, Jalan Dr. Suparno 61 Purwokerto Raharjo, Sukmaji Anom Jurusan Fisika, Fakultas MIPA, UNSOED, Jalan Dr. Suparno 61 Purwokerto Prasetyo, Chandra Adi Jurusan Fisika, Fakultas MIPA, UNSOED, Jalan Dr. Suparno 61 Purwokerto magnetic anomaly, gold mining, Village of Cihonje Measurement of magnetic data has been done in the area of ​​the gold mining in the village of Cihonje, the district of Gumelar, the regent of Banyumas in May to June 2013. Based on the modeling that has been conducted on the local magnetic anomalies along cross section of AB obtained six models of subsurface rock, while for along cross section of AB obtained five models. Based on the modeling results, rock formations that developed in the research area are Tapak formation, Halang formation, andesite-basaltic, and the alternating formation of the sandstones with some other rocks. The magnetic susceptibility of subsurface rock in the research area are interpreted ranged from 0.0039 to 0.0174 cgs units with the average magnetic susceptibility of rocks is estimated equal to 0.0099 cgs units that interpreted as the alternating formation of sandstone and claystone from Halang formation. The mineralization of gold ore is estimated to occur in almost of all subsurface rocks, but the most dominant mineralization is estimated to occur in the Halang formation especially on the alternating formation of sandstone and claystone. The gold ore mineralization occurs in the form of veins of pyrite, chalcopyrite, galena, and the others, that fill the cracks and the pores of the rocks. Keywords: magnetic anomaly, gold mining, Village of Cihonje BERKALA FISIKA 2015-12-08 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/9664 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 2 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3091 2012-04-07T12:36:15Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pemetaan Sebaran Air Tanah Asin Pada Aquifer Dalam di Wilayah Semarang Bawah Nurwidyanto, M. Irham Jurusan Fisika FMIPA UNDIP Widodo, Sugeng PS Kelautan FPIK UNDIP T. Achmad, Refyana Jurusan Fisika FMIPA UNDIP A research to mapping of saline groundwater spreading at deep aquifer in SEMARANG Awash  area, exactly at 49 zone, coordinate X(422000-445000), Y(9222100-9232000) is carry out. Electrical conductivity used in this research as approximation to saline value of groundwater. Then, the isoconductivity contour map made based on that’s conductivity value using surfer 7 to see the mapping of saline groundwater spreading. After that, a hydrochemistry analyze method resemble to Trilinier Piper diagram and Chlorida-Carbonat Ratio (R) used to analyze caused factor of saline from groundwater. Base on the groundwater saline grade clasification from PAHIAA, Jakarta, the groundwater at deep aquifer of Semarang bawah area come in insipid that spread out almost in all Semarang bawah area and insipid-saltish groundwater clasification that just found in two area, are central Pedurungan (Tlogosari) and Tugu Muda direct to Pemuda street area. Base on Trilinier Piper diagram and Chlorida-Carbonat Ratio (R) analyze,  the saline of groundwater at deep aquifer in  Semarang Awash area is the effect from the sea water intrusio, except in central Semarang area the salted of groundwater it’s not caused by the sea water intrution, may be couse by dilution of salt mineral which imbedded in the groundwater.. BERKALA FISIKA 2012-04-06 10:20:34 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3091 BERKALA FISIKA; Vol 9, No 3 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2876 2012-03-29T14:25:45Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc THE ELECTRIC FIELD FORMULATIONS IN THE PLANE-KNIFE CONFIGURATIONS Yoyo Wardaya, Asep Department of Physics, Universitas Diponegoro Semarang Nur, Muhammad Department of Physics, Universitas Diponegoro Semarang In this paper, we calculate enormous electric field produced by the plane-knife configuration of the plasma generator. The value of electric field is calculated by two ways of configurations, the first is the almost perpendicular form of the Capasitor plates and second the perpendicular one. The result of calculation is the plates perpendicular form will produce higher electric fields than the almost perpendicular case. Key words : Plasma generator,  plane-knife configuration , electric field. BERKALA FISIKA 2012-03-29 11:12:16 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2876 BERKALA FISIKA; Vol 14, No 2 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/12804 2016-12-16T09:43:00Z berkala_fisika:RA

nmb a2200000Iu 4500 "151001 2015 eng " 1410-9662 dc PREDIKSI PERHITUNGAN DOSIS RADIASI PADA PEMERIKSAAN MAMMOGRAFI MENGGUNAKAN ALGORITMA JARINGAN SYARAF TIRUAN PROPAGASI BALIK Arifin, Zaenal Jurusan Fisika, Universitas Diponegoro, Semarang Sutanto, Heri Jurusan Fisika, Universitas Diponegoro, Semarang Pamungkas, Adi Jurusan Fisika, Universitas Diponegoro, Semarang Setiawan, Rudi Jurusan Fisika, Universitas Diponegoro, Semarang Radiation Dose, Mammography, Artificial Neural Network, Accuracy. Dose radiation calculation systems in mammography examination can be approximated by models of Artificial Neural Network (ANN) back propagation algorithm. In this study we performed with data from the measurement of air dose mammography and data measurement dose of radiation detectors. ANN architecture by using two inputs and one output. From the simulation results of training resulted in a correlation coefficient of 0.9994 and the MSE of 5.2907e-05. From the test results obtained by the correlation coefficient of 0.9370 dan MSE value generated is equal to 2.2026. this suggests that the neural network algorithm can be implemented to calculate the amount of radiation dose in mammography examination. Keywords: Radiation Dose, Mammography, Artificial Neural Network, Accuracy.  BERKALA FISIKA 2016-12-16 09:09:59 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/12804 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 4 Tahun 2015 eng Copyright (c) 2016 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/3107 2012-04-07T12:42:35Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Disain Peredam Suara Berbahan Dasar Sabut Kelapa dan Pengukuran Koefisien Penyerapan Bunyinya Khuriati, Ainie Laboratorium Instrumentasi dan Elektronika Jurusan Fisika Universitas Diponegoro Komaruddin, Eko Laboratorium Riset Jurusan Fisika Universitas Diponegoro Nur, Muhammad Laboratorium Fisika Atom dan Inti Jurusan Fisika Universitas Diponegoro research aims to determine sound absorption of absorber materials making from coconut coir composites. Absorber material have been made with different composition from coconut coir composites.             Twelve samples have been made. One of samples is natural coconut coir and the other are made from coco fiber and coco peat with certain compositions. From 12 samples, 10 samples have been tested. Absorption coefficients was measured by impedance tube method with ASTM E-1050:1990 standardization.              The experiment results show that coconut coir is up to standard for absorber material according to ISO 11654 , that is with weigthed absorption (aw) over 0,15.  Weigthed absorption of samples are, A:0,30; B:0,44;C:0,27;D:0,44; E:0,51; F:0,44; G :0,47; H:0,49; I:0,31;J:0,41.  So samples A,B,D,E,F,G,H,I and J can be classified in class-D while sample C in class-E.   Absorber materials that have been made are also compatible with marketed products.  The best composition for absorber was mixture of coco dust and coco fiber.  Improving amount of coco fiber improve maximum absorption.  Adding air cavity between samples and wall improve absorption.  Improving mass density of sample making with similar total mass of composition and similar glue improve absorption in low frequency.   Keyword: coconut coir, coco fiber, coco peat, sound absorber, impedance tube, absorption coefficient, pore. BERKALA FISIKA 2012-04-06 10:20:14 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3107 BERKALA FISIKA; Vol 9, No 1 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2929 2012-03-30T14:30:04Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Monsoon Effect at Flood Phenomena on 2002 and 2007 in DKI-JAKARTA Gernowo, Rahmat Faculty of Mathematics and Natural Sciences, Diponegoro University, Semarang Jl. Prof. Sudarto, Tembalang Semarang. The monsoon effect one think especially represent to important matter as causes of floods happen in area of Jakarta. The research of convection pattern above area of DKI-Jakarta based on to existing perception data, which is expected will give the understanding of growth of convection cloud yield torrential rains and deliver floods in DKI-Jakarta on 2002 and 2007. The result of research into whereas in this research is obtained by the rain study of extreme in DKI-Jakarta. As rainfall data result of average from some stations is residing in DKI-Jakarta. The result of research is obtained by comparison analysis whereas, that cloud dynamics in DKI-Jakarta happened at around of December, January and February, where periodicity of monsoon takes place. Keywords: Monsoon, flood and cloud dynamics. BERKALA FISIKA 2012-03-29 14:56:20 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2929 BERKALA FISIKA; Vol 12, No 1 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/25481 2019-09-17T16:39:09Z berkala_fisika:ART

nmb a2200000Iu 4500 "190917 2019 eng " 1410-9662 dc RANCANG BANGUN SISTEM PENGUKURAN SUHU DAN KELEMBABAN UDARA MENGGUNAKAN SENSOR SHT75 BERBASIS INTERNET OF THINGS DENGAN DISPLAY SMARTPHONE Iqbal, Muhammad Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Padang, Padang Yulkifli, Yulkifli Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Padang, Padang Darvina, Yenni Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Padang, Padang SHT75, NodeMCU ESP8266, Internet of Things, ThingSpeak, App Inventor Temperature and humidity are important weather parameters for large purposes, such as agriculture, aviation, tourism, etc. The Indonesia's Meteorology, Climatology and Geophysics Agency is converting from conventional measuring instruments into digital systems. This research aims to determine the performance and design specifications of the internet of things for measuring the air temperature and humidity using the SHT75 sensor with a smartphone display. The system was built from SHT75 module sensor as temperature and humidity sensors with NodeMCU ESP8266 microcontrollers that can access the internet network so that data can be sent to the ThingSpeak. Data server from ThingSpeak appeared on smartphones using App Inventor. The instrument builder circuit was in a 5x5x10 cm3 box containing the SHT75 sensor,the NodeMCU ESP8266, the ON/OFF switch, the RESET button, and the adapter to connect to the source. It was found that results of the design specifications of the measuring instrument has a high accuracy and precision. The accuracy of measuring instruments for air temperature is 98.89% and for air humidity is 99.41%. The precision of measuring instruments for air temperature and humidity are 99.73% and 99.08%, respectively. Keyword : SHT75, NodeMCU ESP8266, Internet of Things, ThingSpeak, App Inventor BERKALA FISIKA 2019-09-17 16:39:09 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/25481 BERKALA FISIKA; Vol 22, No 3 (2019): Berkala Fisika Vol. 22 No. 3 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4985 2013-05-27T14:18:43Z berkala_fisika:RA

nmb a2200000Iu 4500 "120401 2012 eng " 1410-9662 dc SINTESIS DAN KARAKTERISASI MATERIAL MAGNETIK BARIUM HEXAFERRITE TERSUBSTITUSI MENGGUNAKAN TEORI SOLGEL UNTUK APLIKASI SERAPAN GELOMBANG MIKRO PADA FREKUENSI X-BAND Sulistyo, Sulistyo Laboratorium Fisika Material Jurusan Fisika FSM Universitas Diponegoro Marhaendrajaya, Indras Laboratorium Fisika Material Jurusan Fisika FSM Universitas Diponegoro Priyono, Priyono Laboratorium Fisika Material Jurusan Fisika FSM Universitas Diponegoro The Barium hexaferrite well known by permanen magnet which have prime properties for microwave application. The properties of Barium hexaferrite modified by substitution of MnCo and Ti have been investigated. Material was produced by sol-gel processing. Analysis of composition, crystal structure, refinement, microstructure and grain size, hysterisies and microwave characteristic respectively done by means of EDX, XRD, GSAS, SEM, magnetometers and wave guide at frequency1-17GHz. The formed crystal structure were hexagonal with the grain size is 500 nm, saturation magnetisation, field of coercivities , and remaneninduction respectively is 0.32 T,  3.8 kA/m and 0.04 T. The substitution of Fe3+ ion, resulted on decreasing the value of Ms, Hc , Rr and range of microwave absorbtion respectively. The maximum absorbtion of microwave occured on frequency 13.6 GHz. Keywords : barium hexaferrite, permanen magnet, sol-gel method, microwave BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4985 BERKALA FISIKA; Vol 15, No 2 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/30612 2020-06-08T15:23:16Z berkala_fisika:ART

nmb a2200000Iu 4500 "200131 2020 eng " 1410-9662 dc PENGARUH RASIO GRID TERHADAP KUALITAS RADIOGRAF FANTOM KEPALA Priyono, Setyo Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Anam, Choirul Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Budi, Wahyu Setia Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang grid ratio, the quality of radiographs, head phantom This study aims to determine the effect of the grid ratio on the quality of the radiographic examination of a head phantom. The study was conducted by using grid ratios of 5:1, 6:1, and 8:1, the head phantom. The focus-film distance (FFD) was 100 cm. In the antero-posterior projection used voltages of 70, 75, and 80 kVp with a current-time of 25 mAs, while in the lateral projection using voltages of 65, 70 and 75 kVp with a current-time of 20 mAs. The densities of radiographs were measured using a densitometer. Measurement was repeated in 10 locations. The contrast of radiograph was calculated as the difference between adjacent density values. The results showed that the higher level of the grid ratio would lower the density of radiograph, however it does not always give effect to the increase or decrease the contrast of radiographs. It was found that the optimal quality radiographs in antero-posterior projection at a grid ratio of 6:1 for tube voltage of 75 kVp with a current-time of 25 mAs, and in the lateral projections at a grid ratio of 5:1 grid for tube voltage of 75 kVp with a currenttime of 20 mAs. BERKALA FISIKA 2020-06-08 13:14:30 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/30612 BERKALA FISIKA; Vol 23, No 1 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4996 2013-05-27T16:00:48Z berkala_fisika:RA

nmb a2200000Iu 4500 "121001 2012 eng " 1410-9662 dc SIFAT ELEKTROOPTIS SEBAGAI PARAMETER INDIKASI MUTU BERBAGAI JENIS MINYAK GORENG KEMASAN Murni, Sri Jurusan Fisika, FMIPA Universitas Diponegoro Semarang Firdausi, K Sofjan Jurusan Fisika, FMIPA Universitas Diponegoro Semarang Hidayanto, Eko Jurusan Fisika, FMIPA Universitas Diponegoro Semarang Bawono P, Ari Jurusan Fisika, FMIPA Universitas Diponegoro Semarang Abstract In this paper, we introduce the change of polarization angleβ induced by external electric field, as a quality indication of several edible oils without preliminary treatment. The averagevalue ofβ in the interval of applied potential difference plays important role as level of number offree radicals produced in the edible oils. The samples used were olive oil, extra olive oil, palm oil,and corn oil. Theβ value was obtained by measurement of the change polarization angle as the function of magnitude the electric field on the samples. The electric field was produced by DCvoltage power supply on two parallel plates in a separated distance of 2.5 cm and in area of 5 cm× 3 cm. The source of light used was He-Ne laser 1 mW (λ=633 nm). The experiment result showsthat for all the fresh frying oil samples the polarization angle has value between 2.3× 10/V and3.3× 10-4 0/V in the experimental condition. The extra olive oil has the smallest value while palmoil has the greatest. According to the previous study, the olive oil is relatively the best oil. Keywords: frying oil, electrooptics, polarization angle BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4996 BERKALA FISIKA; Vol 15, No 4 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2996 2012-04-04T07:33:57Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Konsep Massa Ekonomis Sebagai Ukuran Kelembaman Pelaku Ekonomi Dalam Ruang Harga (Kajian Mekanika Kuantum Dalam Ekonomi Mikro) Rifai, Bachtiar Kelompok Penelitian Kosmologi, Astrofisika, dan Fisika Matematik (KAM) Jurusan Fisika FMIPA UGM, Yogyakarta Palupi, Dwi Satya Kelompok Penelitian Kosmologi, Astrofisika, dan Fisika Matematik (KAM) Jurusan Fisika FMIPA UGM, Yogyakarta Rosyid, Muhammad Farchani Kelompok Penelitian Kosmologi, Astrofisika, dan Fisika Matematik (KAM) Jurusan Fisika FMIPA UGM, Yogyakarta This paper has studied the correlation of economic systems in the market for goods by using the concept of state and the concept of observable in quantum mechanics.Also proposed the concept of economical mass as an economic actor counterparts concept of inertia or inertia in physics. Studied the things that determine the mass of a principal economic economical. Discussed the possibility of applying the model to market goods with commodities and M N economic actors using the concept of Quantum Many Body Problem. Keywords: Ekonofisika, Applied Physics, Massa economical, Quantum many-body problem BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2996 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/34495 2020-11-26T09:44:32Z berkala_fisika:EDT

nmb a2200000Iu 4500 "201126 2020 eng " 1410-9662 dc JENIS UJI STATISTIK UNTUK ANALISIS HASIL PENELITIAN Anam, Choirul Dalam penelitian, seorang peneliti dituntut unutuk melakukan penelitian yang memiliki kebaruan  (novelty).  Untuk  itu,  peneliti sering  kali  mengusulkan  metode  atau pendekatan  baru  untuk  penyelesaian  suatu permasalahan.  Terhadap  metode  atau pendekatan  baru  yang  diusulkan,  peneliti harus menguji secara komprehensif metode yang  diusulkan,  apakah  memberikan  hasil yang  secara  signifikan  berbeda  dengan metode  sebelumnya  atau  tidak.  Dalam  hal ini, peneliti tidak boleh sekedar mengklaim atau  menyimpulkan  hasil  penelitiannya secara  subyektif.  Misalnya,  dengan melaporkan  bahwa  hasil  yang  diperoleh secara  signifikan  lebih  baik  dibanding metode atau pendekatan sebelumnya. BERKALA FISIKA 2020-11-26 09:44:32 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/34495 BERKALA FISIKA; Vol 23, No 4 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5013 2013-05-27T16:29:20Z berkala_fisika:EDT

nmb a2200000Iu 4500 "111001 2011 eng " 1410-9662 dc Berkala Fisika Berkala Fisika, Tim Redaksi Jurusan Fisika Fakultas Sains dan Matematika Universitas Diponegoro Semarang Berkala Fisika Vol 14 No. 4 (2011) BERKALA FISIKA 2013-05-25 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5013 BERKALA FISIKA; Vol 14, No 4 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3036 2012-04-06T07:42:56Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Penerapan Film Tipis Ba0.25Sr0.75TiO3 (BST) Yang Didadah Ferium Oksida Sebagai Sensor Suhu Berbantukan Mikrokontroler Ardian, A. Departemen Fisika FMIPA, Institut Pertanian Bogor Nady, L. Departemen Fisika FMIPA, Institut Pertanian Bogor Erviansyah, R. Departemen Fisika FMIPA, Institut Pertanian Bogor Syafutra, H. Departemen Fisika FMIPA, Institut Pertanian Bogor Irzaman, Irzaman Departemen Fisika FMIPA, Institut Pertanian Bogor Siswadi, Siswadi Departemen Matematika FMIPA, Institut Pertanian Bogor Ferroelectric material originating from Barium Strontium Titanate (BST), is expected to have high energy because it has a dielectric constant and high charge storage capacity [6]. Materials produced by the process of ferium dopan, it is hoped will be a temperature sensor. If, materials BST and BFST (Barium Ferium Strontium Titanate) subjected to the temperature (material change that temperature), and the resulting voltage, then this material can be applied as a temperature sensor using a microcontroller. Microcontroller that used is ATMega 8535 with internal ADC. Voltage was generated, will be reinforced with a voltage amplifier (OpAmp) and will be processed into digital data at the ATMega8535 internal ADC (Analog Digital Converter).Incoming digital data will be processed and displayed in the view Microcontroller-based desktop applications Delphi 7. The material to be tested is material BST, BFST 5%, and BFST 15%.   Keyword: BST, Temperature sensor, ATMEGA 8535, ADC, Delphi 7 BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3036 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/44185 2022-01-16T05:50:03Z berkala_fisika:ART

nmb a2200000Iu 4500 "220116 2022 eng " 1410-9662 dc ANALISIS FENOMENA ELEKTROHIDRODINAMIK PADA PERMUKAAN MINYAK MENGGUNAKAN PLASMA LUCUTAN KORONA DC POSITIF DENGAN KONFIGURASI ELEKTRODA GRADIENT OF LINE-TO-PLANE (GL-P) Nuraini, Desy Departemen Fisika, Universitas Diponegoro Semarang Wardaya, Asep Yoyo Departemen Fisika, Universitas Diponegoro Semarang Muhlisin, Zaenul Departemen Fisika, Universitas Diponegoro Semarang lucutan korona, korona negatif, korona positif, konfigurasi elektroda GL-P, kurva karakteristik I-V, elektrohidrodinamik Tujuan dari penelitian ini adalah untuk menganalisis pengaruh beberapa variasi yang dipakai terhadap kurva karakteristik serta persebaran angin ion pada fenomena elektrohidrodinamik. Elektroda aktif yang digunakan berukuran 2x4 cm, 3x6 cm, serta 4x8 cm. Penelitian ini dilakukan dengan variasi sudut ketajaman bentuk elektroda aktif () , , dan  dan variasi jarak antar elektroda () , ,  , dan . Hasil penelitian pada kurva I-V menunjukkan bahwa kuat arus bertambah sejalan dengan bertambahnya tegangan, serta pada analisis elektrohidrodinamik menyatakan bahwa pengaruh diameter lubang gumpalan minyak akan berubah jika variasi yang digunakan juga berubah. Penelitian dilakukan dengan elektroda aktif dengan bentuk, ukuran, sudut ketajaman serta jarak antar elektroda yang sama besar. BERKALA FISIKA 2022-01-16 05:50:03 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/44185 BERKALA FISIKA; Vol 24, No 4 (2021): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/6178 2014-02-10T09:36:47Z berkala_fisika:RA

nmb a2200000Iu 4500 "131001 2013 eng " 1410-9662 dc PEMBUATAN LAPISAN FOTOKATALIS ZINC OXIDE (ZnO) DENGAN TEKNIK SPRAY COATING DAN APLIKASINYA PADA PENGERING JAGUNG Hidayanto, Eko Jurusan Fisika Universitas Diponegoro Semarang Sutanto, Heri Jurusan Fisika Universitas Diponegoro Semarang Firdausi, K Sofjan Jurusan Fisika Universitas Diponegoro Semarang Arifin, Zaenal Jurusan Fisika Universitas Diponegoro Semarang ZnO thin film has been deposited on the glass with a spray coating technique. Gel of ZnO 0.5 M was synthesized by dissolving 0.5 M zinc acetate dehydrate in isopropanol andmonoethanolamine solution at room temperature with the molar ratio of MEA and ZnAc is 1:1. The solution was stirred using a magnetic stirrer at 70°C for 30 minutes to get the clear and homogeneous ZnO gel. ZnO gel is placed on the spray hole and sprayed on a heated glasssubstrate till 40oC. Then, the spraying layer spraying was allowed to stand for 3 days tostrengthen the contact with glass layer. Deposition results of ZnO layer is transparent withtransmittance values of 71.4 % and decreases with a decrease in wavelength imposed on the layer.The energy dispersive X-ray (EDX) results show the composition of zinc (Zn) is less than theoxygen (O) with a ratio Zn : O = 38.44 % : 61.56 %. The scanning electron microscopy (SEM)results show ZnO thin film has a smooth and homogeneous surface with a grain size of 57 nm. Thetest results demonstrate ZnO layer has a band gap value of 3.01 eV. The drying corn shows thatdirectly drying using sunlight has a faster rate compared using ZnO glass. Surface morphology ofthe layer of dried corn using ZnO glass has brighter color and lice compared to directly drying onsunlight. Keywords: Photocatalyst, ZnO, Thin Film, Spray Coating, Corn, Drying BERKALA FISIKA 2014-02-10 09:02:33 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/6178 BERKALA FISIKA; Vol 16, No 4 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3053 2012-04-07T08:40:02Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Rancang Bangun Prototipe Alat Pres Tahu Otomatis Berbasis Mikrokontroler Sumariyah, Sumariyah An automatic tahu pressing device prototype that controlled by AT89C51 has been made. The tahu pressing is completed by  the cast with 15 cm length, 10 cm width  and  2,5 cm high. A microcontroller controlled stepper motors move used to make the desiserd shifting of the pressing thickness. One was used to move a conveyor deliver the tahu to be pressed and another to press the tahu itself. The pressing was done by setting the DL value to yield strain. Stepper motors’ step angle was reduced using a gear combination which results in a 0,270 per step. Each stepper motor yields  0,005 mm shifting of the rotating mechanics The prototype of an automatic tahu pressing device that controlled by microcontroller AT89C has done properly, that is automatically pressing tahu according desired  thickness. BERKALA FISIKA 2012-04-06 10:17:07 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3053 BERKALA FISIKA; Vol 10, No 4 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2457 2012-03-29T14:43:26Z berkala_fisika:RA

nmb a2200000Iu 4500 "120319 2012 eng " 1410-9662 dc Studi Konduktivitas Listrik Film Tipis Ba0.25Sr0.75TiO3 Yang Didadah Ferium Oksida (BFST) Menggunakan Metode Chemical Solution Deposition Irzaman, Irzaman Departemen Fisika FMIPA, Institut Pertanian Bogor Jalan Meranti Gedung Wing S no 3 Dramaga Bogor - 16680 Erviansyah, R Departemen Fisika FMIPA, Institut Pertanian Bogor Jalan Meranti Gedung Wing S no 3 Dramaga Bogor - 16680 Syafutra, H Departemen Fisika FMIPA, Institut Pertanian Bogor Jalan Meranti Gedung Wing S no 3 Dramaga Bogor - 16680 Maddu, A Departemen Fisika FMIPA, Institut Pertanian Bogor Jalan Meranti Gedung Wing S no 3 Dramaga Bogor - 16680 Siswadi, Siswadi Departemen Matematika FMIPA, Institut Pertanian Bogor Jalan Meranti Gedung Wing S no 3 Dramaga Bogor - 16680 Has done growth Ba0,25Sr0, 75TiO3 (BST) thin film and BST are pure Ferium Oxide Fe2O3 dopant (BFST) with dopant variations 5%, 10% and 15% above the substrate Si (100) type-p using Chemical Solution Deposition Method (CSD) with the spin coating technique at a speed of around 3000 rpm for 30 seconds. BST thin films made with 1 M concentration and annealing at a temperature of 850°C for Si Substrate. Thin film on silicon substrate type-p thickness characterization performed using the volumetric method and the characterization of electrical conductivity by using LCR meter. From the characterization results showed the thickness increases with the addition of ferium oxide dopant given. Electrical conductivity value of BST and BFST thin films are in the range semiconductor materials and electrical conductivity values obtained increased when the higher intensity light is used whereas resistance value could decrease if the light intensity is increased. The addition of ferium oxide dopant will increases electrical conductivity value of BST and BFST thin films.   Keywords : BFST, thin film, CSD, spin coating, electrical conductivity BERKALA FISIKA 2010-10-22 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2457 BERKALA FISIKA; Vol 13, No 1 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/51829 2023-01-16T12:38:28Z berkala_fisika:ART

nmb a2200000Iu 4500 "221015 2022 eng " 1410-9662 dc ANALISIS FENOMENA ELEKTROHIDRODINAMIK MENGGUNAKAN PLASMA LUCUTAN KORONA DC POSITIF DENGAN KONFIGURASI ELEKTRODA MATA PAHAT DAN TITIK TENGAH-BIDANG PADA MINYAK KELAPA SAWIT Munajib, Charis Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Wardaya, Asep Yoyo Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Muhlisin, Zaenul Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Gunadi, Isnain Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang corona discharge, tooltip electrode configuration, mid-plane point, I-V characteristic curve, electrohydrodynamics Research  has  been  carried  out  on  the  analysis  of  I-V  characteristic  curves  and electrohydrodynamic phenomena using palm oil with a positive DC corona discharge generator with Chisel Eye and Mid-Field electrode configurations. This study aimed to obtain the effect of several  variations  used  on  the  characteristic  curve  and  distribution  of  ion  winds  on electrohydrodynamic phenomena. This research was conducted with 6 variations of the size of the dimensions of active electrodes and variations in the distance between the electrodes (c) 0.5 cm, 1 cm, 1.5 cm, and 2 cm. In the study of the I-V characteristic curve, the results show that with the increase in the applied voltage, the stronger the current produced will increase. At electrode D and a distance of 0.5 cm, the circuit is given a voltage of 5.32 kV produces a current of 10.5 A, whereas if the circuit is given a voltage of 6.34 kV it produces a current of 27.5 A. In the study of the analysis of electrohydrodynamic phenomena, it was found that if the variation used changed it would affect the diameter of the deformation of the palm oil in the form of a circle. At electrode D, at a distance of 0.5 cm with a voltage of 7.14 kV it produces a circular oil deformation diameter of  2.7  cm,  while  at  a  distance  of  1  cm  with  a  voltage  of  11.23  kV  produces  a  circular  oil deformation diameter of 5.5 cm. BERKALA FISIKA 2023-01-02 05:17:57 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/51829 BERKALA FISIKA; Vol 25, No 4 (2022): Berkala Fisika eng Copyright (c) 2023 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/7385 2014-09-24T09:08:35Z berkala_fisika:RA

nmb a2200000Iu 4500 "140401 2014 eng " 1410-9662 dc PENDUGAAN LAPISAN RESERVOIR PANAS BUMI DI KAWASAN GUNUNGAPI SLAMET DENGAN MEMANFAATKAN DATA ANOMALI MEDAN GRAVITASI CITRA SATELIT Reswara P.A., Ardhana Program Studi Fisika, Fakultas Sains dan Teknik, Universitas Jenderal Soedirman Jl. dr. Suparno No. 61, Karangwangkal, Purwokerto Sehah, Sehah Program Studi Fisika, Fakultas Sains dan Teknik, Universitas Jenderal Soedirman Jl. dr. Suparno No. 61, Karangwangkal, Purwokerto Estimation of the subsurface geological structures of Slamet Volcano area, Central Java, has been done by utilizing gravity field anomaly data of image of Geodetic Satellite (Geosat ) and European Remote Sensing-1 (ERS-1) satellite which has been corrected up to free air correction. This research aims to model the 2D profile of the subsurface geological structure which includes some layers of bedrocks, geothermal reservoir, magma chamber, and other geological structures. The procedure of data processing begins with bougeur and topographic corrections. The data obtained, then transformed to horizontal surface, filtered from the local anomalies effects, and corrected from the regional anomaly effect. The results obtained are in the form of residual gravity anomaly data. Modeling is done on the residual gravity anomaly data using 2 ½-D Talwani method packaged in Grav2DC for Window software. The modeling results show the subsurface geological structure of Slamet Volcano region consists of andesite magma with density value of 2.45 gram/cm3, old lava rock with density value of 2.9 gram/cm3, andesite rock with density of 2.54 gram/cm3, and andesitic – basaltic rock with density of 2.67 gram/cm3. Based on the research area geological information, strongly estimated that the geothermal reservoirs layers are in the andesite rock by filling in it pores or it fissures in the rock. Keywords: gravity field anomaly, modeling, geothermal reservoirs, Slamet Volcano. BERKALA FISIKA 2014-09-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/7385 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 2 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3069 2012-04-07T08:00:41Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Analisis Geometri Akuifer Dangkal Mengunakan Metode Seismik Bias Reciprocal Hawkins (Studi Kasus Endapan Alluvial Daerah Sioux Park, Rapid Creek, South Dakota, United State of America) Listiyani, Fenti Laboratorium Geofisika Jurusan Fisika Universitas Diponegoro Yulianto, Gatot Laboratorium Geofisika Jurusan Fisika Universitas Diponegoro Data processing of refraction Seismic with reciprocal Hawkins method have been done by using the secondary data in area of Sioux Park, Rapid Creek, South Dakota, United State of America which  has geology structure of alluvial sediment. The sediment Alluvial has the form of water carrier rock precipitated by Rapid Creek. The result of this research are: first layer with velocity vary from 268 m/s to 347 m/s consist of clay  functioning as covering layer, the second layer have velocities 939 m/s-1829 m/s, depth 0.28 m-3.43 m and thickness 0.26 m-4.40 m, lapped  over from clay, sand, and gravel functioning as carrier coat irrigate or coated acquifer and the third layer, have velocity 1874 m/s-2216 m/s lapped over from stone napal, acts as waterproof coat (impermeable). These acquifers are unconfined aquifer. Keywords: acquifer,  seismic refraction, ground water BERKALA FISIKA 2012-04-06 10:17:48 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3069 BERKALA FISIKA; Vol 10, No 1 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2796 2012-03-29T11:53:51Z berkala_fisika:RA

nmb a2200000Iu 4500 "120329 2012 eng " 1410-9662 dc PENCITRAAN RESISTIVITAS 2D BAWAH PERMUKAAN TANAMAN JATI (Tectona Grandis Sp.) MENGGUNAKAN KONFIGURASI WENNER (STUDI KASUS: LAHAN TANAMAN JATI DI BELAKANG GEDUNG MIPA UNSOED) Sehah, Sehah Staf Dosen Program Studi Fisika, Fakultas Sains dan Teknik, Universitas Jenderal Soedirman Jalan dr. Suparno No. 61 Purwokerto Sugito, Sugito Staf Dosen Program Studi Fisika, Fakultas Sains dan Teknik, Universitas Jenderal Soedirman Jalan dr. Suparno No. 61 Purwokerto Two dimensional (2D) resistivity survey was conducted on a teak field behind the MIPA building of UNSOED, Purwokerto. The purpose of this research was to know the subsurface condition of the teak field, so that can also determine the suitability of the field to teak plant. The survey was conducted using resistivity-meter NANIURA type NRD 22S. The type of configuration was used is Wenner, with a minimum electrode spacing of two meters and maximum of ten meters. The measurement conducted for three tracks, namely LJ1, LJ2 and LJ3 with length of them self are 64 meters, 70 meters, and 40 meters, with relatively flat topography at an altitude of 110 meters above sea level. Data processing was done using RES2DINV 3.57.37 software that the result is a 2D-image of subsurface resistivity. The depth is obtained for each track is 5.37 meters. Interpretation of hydrogeology refers to local geological information. The result of interpretation is digitized using Arc-View GIS 3.3 in order to obtain final result that is hydro-geological images. The result of research show that at the LJ1 and LJ3 contain two layers of rock, there is sandy soil and clayey sand. At the LJ2 track there are three layers, sandy soil, clayey sand, and sand. The resistivity value of sandy soil is 79.4 – 193.0 Ωm, resistivity of clayey sand is 18.9 – 83.4 Ωm and resistivity of sand is 15.7 – 31.8 Ωm. The more downward tendency of resistivity value is more smaller, which indicates more water content. The results of research show that the layers of rock which is found in the land of teak is sandy soil, clayey sand and sand. According to the reference, the entire layer of rock is less than optimal to plant teak. Keywords: 2D-resistivity, land of teak plant, sub surface, Wenner configuration. BERKALA FISIKA 2012-03-29 06:14:46 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2796 BERKALA FISIKA; Vol 14, No 1 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/70085 2025-01-08T12:53:34Z berkala_fisika:ART

nmb a2200000Iu 4500 "240717 2024 eng " 1410-9662 dc DESAIN FANTOM BERBASIS GELATIN DAN Zn UNTUK MENENTUKAN NILAI SNR DAN CNR HASIL PEMERIKSAAN CT SCAN Marwah, Siti Ainun Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Saharani, Nanda Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Purwanto, Purwanto Instalasi Radiologi, RSUD Wahidin Makassar, Indonesia Astuty, Sri Dewi Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Dewang, Syamsir Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia phantom gelatin dan Zn, Signal to Noise Ratio, Contras to Noise Ratio, Hounsfield Unit, Modulation Transfer Function. Telah dilakukan pembuatan phantom berbasis bahan gelatin yang diuji dengan CT-Scan. Pengujian ini untuk mengetahui nilai HU pada setiap variasi gelatin serta untuk menentukan nilai SNR dan CNR pada phantom buatan ini. Parameter yang di analisis yaitu nilai tegangan tabung (kV) dengan variasi 80 kV, 100 kV dan 120 kV sehingga diperoleh nilai Signal to Noise Ratio (SNR), Contras to Noise Ratio (CNR), Housnfield Unit (HU) dan Modulation Transfer Function (MTF). Metode yang digunakan adalah metode eksperimen dengan menggunakan perbandingan kandungan gelatin yang diuji dengan variasi 25, 26, 27, 28, dan 29 gr yang dicampurkan dengan Zn sebanyak 3 gr.  Hasil yang didapatkan pada penelitian ini berdasarkan pengukuran nilai SNR dan CNR pada antar sampel pada tegangan terjadi peningkatan. Semakin tinggi tegangan tabung maka semakin tinggi juga nilai SNR dan CNR serta material komposit antara gelatin dengan Zn dapat digunakan sebagai phantom payudara untuk keperluan uji kesesuaian. Untuk nilai HU phantom payudara sesuai dengan nilai rentang HU organ payudara, kisaran nilai HU antara 40-71 HU yang setara untuk organ payudara.. Nilai MTF juga mengalami peningkatan di setiap tegangan dengan nilai 0,21 mm-1, 0,28 mm-1, dan 0,32 mm-1 BERKALA FISIKA 2025-01-08 09:35:44 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/70085 BERKALA FISIKA; Vol 27, No 2 (2024): Berkala Fisika eng Copyright (c) 2025 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/9381 2015-11-05T08:34:47Z berkala_fisika:RA

nmb a2200000Iu 4500 "150102 2015 eng " 1410-9662 dc RANCANG BANGUN SISTEM PENGUKURAN PERGESERAN TANAH MENGGUNAKAN SENSOR VARIABEL RESISTOR Sugito, Sugito Program Studi Fisika, Fakultas Sains dan Teknik, Universitas Jenderal Soedirman Hartono, Hartono Program Studi Fisika, Fakultas Sains dan Teknik, Universitas Jenderal Soedirman Permadi, Ipung Program Studi Teknik Informatika, Fakultas Sains dan Teknik, Unsoed variable resistor, sensor, Wheatstone bridge, characterization The phenomenon of ground motion are things that need serious attention. The impact that can be caused by the ground motion can not be underestimated. The velocity of ground motion at each area has different characteristics. Monitoring of ground motion continuously is one way to be able to determine the policy relating to protection measures. Variable resistor is a component that can be used to detect the presence of such a shift. Variable resistor connected to the shear plane using a cord will be amended proportional  with the shift in resistance value of shear plane. Variable resistor arranged with others resistor to form a Wheatstone bridge circuit. Thus the change in resistance on the variable resistor will produce a voltage change. Value of voltage changes were characterized to obtain the calibration equations, response time and stability of the sensor. Data acquisition is done by using a personal computer and the device interface DAQ NI USB6009. While programming created using LabView 7.1 software. Based on the results obtained by testing the sensor response time is very good sensor is equal to 0.47 seconds. Highly stable sensors to take measurements, look at the value of the average reading deviation of 1.14 %. The sensor has a measurement in the range of 0 to 17 cm. Keywords : variable resistor, sensor, Wheatstone bridge, characterization BERKALA FISIKA 2015-11-05 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/9381 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 1 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3085 2012-04-07T12:34:16Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Perhitungan Kecepatan Terminal Obyek Jatuh di Udara Edi Widodo, Catur Jurusan Fisika FMIPA Universitas Diponegoro A program for determined terminal velocity of falling object in the air have been done with Python programming language version 4.2. Program was simulated interaction between massive object spheris with fluid gas (air). Program was construct by mean finite difference equation in object oriented programming Python. Object simulation is falling massive object spheris in static fluide. Input parameter is mass and radius object and viscosity  of  fluid. Output is direction and velocity of object. The result of simulation indicated the terminal velosity is depend on mass and radius of object  and viscosity of fluid. BERKALA FISIKA 2012-04-06 10:20:46 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3085 BERKALA FISIKA; Vol 9, No 4 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2869 2012-03-29T14:25:06Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc UJI KECEPATAN REKONSTRUKSI CITRA PADA CT-SCAN METODE BACK-PROJECTION (BP) DAN METODE FILTERED BACK-PROJECTION (FBP) DENGAN PEMFILTERAN PADA DOMAIN SPASIAL Ngurah Sutapa, Gusti Jurusan Fisika, FMIPA, Universitas Udayana, Bali Anam, Choirul Jurusan Fisika, FMIPA, Universitas Dionegoro, Semarang Conventional X-ray have many limitations in describing the object being imaged because of overlap on multiple objects on a single line of projection. To overcome this limitation, the object was expossed in several directions, and then the projections from several directions was reconstructed to get cross-section image. The reconstruction method was widely used filtered back projection method as the development of a simple back projection. In this study will be evaluated the speed of the reconstruction for the back projection method and filtered back projection in the spatial domain. It was conducted for the projection angle from 0 to 180 degree, with interval  25, 20, 15, 10 and 5 degrees. In this research the number pixels was 50x50. It was found that the smaller of the interval of the angle projections, then it will get better results, but it takes longer. From back projection and filtered back projection methods, was obtained if the interval of the angle projections a half times smaller, it will take nearly twice as long of time. It was found that the time difference between back-projection and filtered back projection methods is less than 0.1 seconds. Keywords: Image reconstruction, back-projection, filtered back-projection, convolution BERKALA FISIKA 2012-03-29 11:12:16 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2869 BERKALA FISIKA; Vol 14, No 2 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/10838 2016-04-21T12:14:04Z berkala_fisika:RA

nmb a2200000Iu 4500 "150701 2015 eng " 1410-9662 dc PEMANFAATAN METODA INVERSI DAN PROBABILISTIC NEURAL NETWORK PADA DATA SEISMIK DALAM PENENTUAN ZONA RESERVOAR BATUGAMPING (CARBONATE BUILDUP) DI LAPANGAN SUKO, CEKUNGAN JAWA TIMUR UTARA Novianto, Ardian Teknik Geofisika, Universitas Pembangunan Nasional “Veteran” Yogyakarta Jln. SWK 104 Condong Catur Sleman Yogyakarta AI inversion, Multi-attribute PNN, Carbonate Buildup Limestone particularly Carbonate Buildup is one type of reservoir potential as a hydrocarbon accumulation. Problems often encountered in the analysis are the type of reservoir porosity deployment complexity that is very different from other rocks. The understanding of porous area as a zone of a reservoir in the body Carbonate buildup will provide an overview in the development and determination of drilling new wells. Identification of potential zones in carbonate buildup can be done with the approach of the seismic data inversion process and multi-attribute with neural network method. Seismic inversion process is the reverse of the forward modeling process which will produce Acoustic impedance value that describes not only the boundary between the layers but also a layer of rock itself (Layer Properties). Validation of the results of the inversion process is done by creating a density map using multi-attribute process with probabilistic neural network method. The results of the inversion and multi-attribute process is expected to provide an overview of the deployment area having a large porosity which can serve as a reservoir zone. The results from the combination of the two methods showed that the reservoir zone is in the central part of carbonate buildup that field through the development of new drilling process can be directed at the zone. Keywords: AI inversion, Multi-attribute PNN, Carbonate Buildup BERKALA FISIKA 2016-04-21 11:48:02 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/10838 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 3 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3102 2012-04-07T12:40:55Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Rekayasa Bahan untuk Meningkatkan Daya Serap Terhadap Gelombang Elektromagnetik dengan Matode Deposisi Menggunakan Lucutan Korona Gunawan S.K., Vincensius Laboratorium Fisika Zat Padat, Jurusan Fisika, Universitas Diponegoro The aim of this research is to engineer soft steel  which have low value absorbance of electromagnetic waves become  a material which have higher value absorbance.  The method used is deposition by corona discharge. Corona discharge generated in free space will ionisize air producing nitrogen ion that can be deposite in basic material.  This process will increase the density in the surface of basic materials and then will make the value of linear absorbance constant of basic material become higher.  The optimal result in this research is the raise of  the value of linear absorbance constant by 54,3 % with the time of deposition in 30 minutes, the voltage of electrode 5 kV and  distance between electrodes 6 mm. BERKALA FISIKA 2012-04-06 10:20:14 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3102 BERKALA FISIKA; Vol 9, No 1 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2923 2012-03-30T14:32:36Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pembangkitan dan Pemulihan Citra Biner Markov Random Field (MRF) secara Stokastik Dengan Algoritma Markov Chain Monte Carlo (MCMC) Adi, Kusworo Jurusan Fisika - FMIPA, Universitas Diponegoro Bayu Suksmono, Andrian Sekolah Teknik Elektro dan Informatika, Institut Teknologi Bandung Ising model or the Spin Glass is a model used to solve the magnetic properties of materials and the occurrence of phase transitions from paramagnetic to ferromagnetic properties. Magnetization of the material comes from the vortex that has two kinds of electron spin, ie {-1 / 2, +1 / 2}. Both spin gives the direction of magnetization (North-South) that opposite. Two-dimensional Ising model (2D), often called a Markov Random Field (MRF). This model is a stochastic model that can represent the image texture. Result binary image generation MRF much affected by changes in temperature, the spin direction will be random if the environment inside a high enough temperature, ie above the critical tempertaur (or Currie temperature) Tc, at this kedaan paramagnetic material. Conversely, if the environmental temperature below Tc, then the material would be ferromagnetic. As for binary image restoration MRF is affected by noise levels and the number of iterations, the best results the image restoration process at the level of noise from 0 to 0.5.   Keywords:  image restoration, markov random field, stochastic BERKALA FISIKA 2012-03-29 14:54:02 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2923 BERKALA FISIKA; Vol 12, No 4 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/23833 2019-06-25T13:48:03Z berkala_fisika:RA

nmb a2200000Iu 4500 "190624 2019 eng " 1410-9662 dc RANCANG BANGUN SISTEM PENGENDALI TEMPERATUR DENGAN PROPORSIONAL, INTEGRAL DAN DIFERENSIAL (PID) BERBASIS MIKROKONTROLER ARDUINO UNO Noviyani, Siti Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Sumariyah, Sumariyah Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro PID, temperature, Ziegler-Nichols method, Arduino Uno The aim of this research was to realize a design of a temperature control system with the proportional-integral-differential (PID) based on the Arduino Uno microcontroller, and toanalyz e the PID to the system. The PID control method was designed by identifying plants using the Ziegler-Nichols method to determine PID parameters consisting of proportional constant (Kp), integral constant (Ti), and differential determination constant (Td). Hardware design consisted of the Arduino Uno microcontroller which is open source with PID and pulse width modulation (PWM), and it can be control with feedback in the form of temperature sensors, AC lamp generators, and AC dimmer lamps. The system was implemented using C language with Arduino IDE software. The system can be done at the best stability point with a value of Kp = 0.015, Ti = 101.52, Td = 25.38. The three parameters have their respective functions, i.e. Kp is used to small error detector, Ti is to back-up system in order to work around the set-point, and Td is to speed up the system rate. Keywords: PID, temperature, Ziegler-Nichols method, Arduino Uno BERKALA FISIKA 2019-06-24 11:44:36 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/23833 BERKALA FISIKA; Vol 22, No 2 (2019): Berkala Fisika Vol. 22 No. 2 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4980 2013-05-27T11:13:59Z berkala_fisika:RA

nmb a2200000Iu 4500 "120101 2012 eng " 1410-9662 dc MAGNETIZATION AND POLARIZATION PROFILE IN PML-TYPE MAGNETOELECTRIC MULTIFERROICS WITH CANTED SPIN SYSTEM Gunawan, Vincensius Laboratorium Fisika Zat Padat, Jurusan Fisika, Fak. Sains dan Matemtika, Universitas Diponegoro Stamps, Robert L School of Physics,the University of Western Australia, 35 Stirling Highway, Crawley,Western Australia,Australia We calculate the profile of both magnetization and polarization of a PML-typemagnetoelectric multiferroics which allow the magnetization of sub-lattices to be canted.  Thecalculation is started by deriving the Landau energy density and followed by solvingsimultaneously three equilibrium equations which respect to polarization, magnetization andcanting angle.   It is predicted that magnetoelectricity give rise to a “bump” in polarization profile. It is also calculated that the application of a magnetic/an electric field will also influence thepolarization/magnetization of the material. Keywords:  multiferroics, magnetization and polarisation BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4980 BERKALA FISIKA; Vol 15, No 1 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2973 2012-04-03T11:48:47Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pengaruh Kenaikan Suhu Cairan Developer Terhadap Densitas Radiograf Septiadi, Jujun RSUD Ciamis Anam, Choirul Laboratorium Fisika Atom dan Nuklir, Jurusan Fisika FMIPA UNDIP Azam, Much Laboratorium Fisika Atom dan Nuklir, Jurusan Fisika FMIPA UNDIP This aim of the research is to obtain an optimal developer temperature. The increase of dilution temperature of developer to radiograph density has been measured. The Research is conducted with measuring radiograph density with a certain exposure factor and materials and varies temperature among 170 C – 320 C.  The result indicates that the higher of temperature is the greater of its density value. The optimal temperature obtained at spanning temperature among 200 C – 230 C.   Key words: The dilution temperature of developer, density of radiograph, optimal temperature BERKALA FISIKA 2012-03-30 15:00:48 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2973 BERKALA FISIKA; Vol 11, No 3 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/4991 2013-05-27T16:03:20Z berkala_fisika:RA

nmb a2200000Iu 4500 "120701 2012 eng " 1410-9662 dc IDENTIFIKASI ALIRAN AIR INJEKSI DI LAPANGAN TALANG JIMAR REGION SUMATRA MENGGUNAKAN METODE SPONTANEOUS POTENTIAL Fithria I D, Ni'matul Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Diponegoro Setyawan, Agus Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Diponegoro Yulianto, Tony Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Diponegoro Spontaneous-potential observation using amplitude potential method had been done beneathTalang Jimar area. The purpose of observation are to determine the distribution and depth of fluidinjection. Spontaneous-potential which has been corrected then processed using excel and surfer 9 toknow the distibution of its spread, while for the clarified of the deph we used spherical model. Thespontaneous-potential result shows ranging from -40 mV up to 10 mV with direction towards thereference block and a depth of 244,93 meters show. Keywords : Spontaneous‐potential, fluid injection, Talang Jimar, spherical model. BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4991 BERKALA FISIKA; Vol 15, No 3 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2991 2012-04-03T15:26:24Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Sudut Putar Jenis Elektrooptis pada Bensin dan Spiritus Riyani, Riyani Laboratorium Optoelektronik & Laser, Jurusan Fisika FMIPA UNDIP Marhaendrajaya, Indras Laboratorium Optoelektronik & Laser, Jurusan Fisika FMIPA UNDIP Firduasi, K. Sofjan Laboratorium Optoelektronik & Laser, Jurusan Fisika FMIPA UNDIP In this paper, we measured the specific electro optic rotary power h of petroleum and spiritus solution in static external electric field Eex using Kerr Effect. The magnitude field to induce the samples is produced by two parallel plates (3 ´ 4 cm2) applied on varied DC high voltage 0-10 kV. Variation of NaCl solution is held on 5%, 10%, until 35%. The light source used to observe change of polarization angle is diode pointer laser 654 nm in wavelength. From the result of experiment we obtained that theh’s value of petrol is (0.1040.008) o/V and for spiritus is (0.0660.006) o/V, indicates that Petrol optics more active than spiritus one.   Key words: non-linear optics, external electrics field, specific electro optic rotary power BERKALA FISIKA 2012-04-03 11:53:14 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2991 BERKALA FISIKA; Vol 11, No 1 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/34357 2020-11-22T18:12:16Z berkala_fisika:ART

nmb a2200000Iu 4500 "200731 2020 eng " 1410-9662 dc ANALISIS PERMUKAAN NANOPARTIKEL FERIT SENG BERDASARKAN ADSORPSI ISOTERM GAS NITROGEN Kadarisman, Kadarisman Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Jl. Prof. Soedarto, S.H., Semarang 50275 Nurhasanah, Iis Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Jl. Prof. Soedarto, S.H., Semarang 50275 This research aims to analyze surface characteristic of zinc ferrite nanoparticles based on the N2 adsorption isotherm. The morphology and size of zinc ferrite nanoparticles were observed using a scanning electron microscope. Analysis of N2 adsorption isotherm using the Brunauer- Emmett-Teller  equation  obtained  a  specific  surface  area  of  9.78  m2/g  and  mesoporous structure.    Zinc  ferrite  nanoparticles  were  composed  of  spherical  primary  particles  with  a diameter  of  67  nm.  The  size  of  the  nanoparticles  obtained  from  the  specific  surface  area analysis was greater than the scanning electron microscope image analysis. This finding shows that zinc ferrite nanoparticles are agglomerating to form larger secondary particles. Keywords: Zinc ferrite, nanoparticle, surface area, agglomeration  BERKALA FISIKA 2020-11-22 17:41:26 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/34357 BERKALA FISIKA; Vol 23, No 3 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5007 2013-05-27T16:22:19Z berkala_fisika:RA

nmb a2200000Iu 4500 "120701 2012 eng " 1410-9662 dc EVALUASI PERUBAHAN STRUKTUR AKIBAT SUBSTITUSI PARSIAL ION Mn +2 DAN ION Ti PADA M HEKSAFERIT BaFe 12-2X Mn MENGGUNAKAN ANALISIS RIETVELD Widiyanto, Widiyanto Jurusan Fisika Fakultas Sains dan Matematika Universitas Diponegoro Priyono, Priyono Jurusan Fisika Fakultas Sains dan Matematika Universitas Diponegoro Nurhasanah, Iis Jurusan Fisika Fakultas Sains dan Matematika Universitas Diponegoro Cationic interaction of Mn+2and Ti +4substitution on conventional hexaferriteBaFe O have been studied using X-ray diffraction (XRD) and  analysis by the Rietveld method. These Research was conducted by combining compound of Fe O12 19 TiO2 to form  (Fe,MnTi)2O  phase3BaCO3 phase and heated at 1200. Then, Compound of (Fe,MnTi)0 C to form of BaFe12-2xresult of rietveld analysisshowed that the composition of Hexaferrite BaFe22 3, MnCO  and3O  phase mixed withMn Ti O3x x 19 compounds. The  as main phase and Fe2Oas a second phase. At all compositions showed that the largerfraction of ions Mn+23  and Ti+4 ions able to change latice parameter from  the volume unitcell of conventional hexaferrite. The results reatveld iteration of the phaseBaFe MnTiO (x = 1.0) obtained values of lattice parameters a = 5.9116 Ǻ and c =23.2532 Ǻ or shrinkage abaut 5,0 % volume unit cell and at  BaFe Mn Ti O10 19 (x=2.5)the volume unit cell 7,0% lower  than conventional hexaferrite. Keywords: Rietveld, unit cell, substitusi io,  hexaferrite,  12-2x7 2.5 2.5 19Mn Ti Ox x 19 BERKALA FISIKA 2013-05-27 13:55:05 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5007 BERKALA FISIKA; Vol 14, No 3 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3030 2012-04-05T15:02:17Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Prototipe Pemanas Air Tenaga Surya Menggunakan Karbon Sebagai Penampung Kalor Wihantoro, Wihantoro Jurusan Fisika – Universitas Jenderal Soedirman Yanto, Agus Jurusan Fisika – Universitas Jenderal Soedirman Sunardi, Sunardi Jurusan Fisika – Universitas Jenderal Soedirman A solar water heater prototype that fully exploit the nature of black body radiation are made from carbon powder mixed with cement as a thermal energy container material has been created. The phenomenon of physics that underlie the pattern of spread of heat and decrease their physical equations studied in this paper.Construction of heating a metal box containing the installation of planar spiral-shaped copper pipe which is covered with mortar-carbon. The water that fills the copper pipes are supplied by thermal energy from carbon-mortar. Immediately after absorbing heat energy, water density to be different in each section of pipe, causing water circulation by convection between the heater with a water reservoir. The performance of prototype heater is seen from measurements of water temperature rise in the reservoir every 15 minutes. The results are used to determine the average temperature rise of water in every second of it at once to calculate heat energy absorbed by the water in each second. Water temperature in the reservoir increased by 0.0009 ° C per second. At the maximum irradiation conditions, the rate of heat per second that are transferred from a mixture of carbon into the water-cement amounted to 0.075 kW.   Keywords: heat energy, water circulation by convection, heat rate per second BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3030 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/44180 2022-01-16T05:28:56Z berkala_fisika:ART

nmb a2200000Iu 4500 "220116 2022 eng " 1410-9662 dc OTOMASI SISTEM PENGENDALIAN SUHU PADA INSINERATOR UNGGUN TETAP MENGGUNAKAN PENGENDALI DUA POSISI Khuriati, Ainie Departemen Fisika, Universitas Diponegoro Semarang insinerator, pengendali dua posisi, ruang bakar, termokopel. Tungku  pembakaran  adalah    bagian  paling  penting  dari  insinerator  dimana  pembakaran berlangsung.    Pengendalian  suhu  tungku  menjadi  sangat  penting  dalam  pengoperasian  sebuah incinerator  terutama  untuk  meminimalkan  emisi.  Pengendalian  suhu  dilakukan  dengan menggunakan  pengendali  dua  posisi  tipe  T2N4S-14R,  relai,  dan  solenoida  sebagai  aktuator. Sensor  suhu  menggunakan  termokopel  tipe  K.  Bahan  bakar  menggunakan  liquid  petroleum  gas (LPG). Pengujian dilakukan dengan dua buah setpoint masing-masing sebesar 400oC dan 300oC pada ruang bakar utama. Setpoin dicapai hanya memerlukan waktu 35 detik dan 20 detik untuk masing-masing setpoint. Makalah ini difokuskan pada pengendalian suhu secara eksperimental. BERKALA FISIKA 2022-01-16 05:28:56 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/44180 BERKALA FISIKA; Vol 24, No 3 (2021): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/3048 2012-04-06T20:07:37Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pengukuran Panjang Koherensi Menggunakan Interferometer Michelson Setyaningsih, Agustina Laboratorium Optoelektronik & Laser, Jurusan Fisika FMIPA UNDIP Marhaendrajaya, Indras Laboratorium Optoelektronik & Laser, Jurusan Fisika FMIPA UNDIP Firdausi, K. Sofjan Laboratorium Optoelektronik & Laser, Jurusan Fisika FMIPA UNDIP A simple measurement of coherence length of He-Ne laser, red diode laser, and green diode laser using Michelson interferometer has been conducted. The steps in this research were setting up the Interferometer by places movable mirror on mirror rail. To determine the coherence length of the laser’s light, movable mirror has been shifted until the interference fringes disappear on the screen. Results of measurement for the coherence length of He-Ne laser I is  cm, He-Ne laser II is  cm, red diode laser I is cm, and green diode laser II is  cm. Keywords: Coherence, coherence length. BERKALA FISIKA 2012-04-06 10:17:07 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3048 BERKALA FISIKA; Vol 10, No 4 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2030 2012-03-29T14:43:26Z berkala_fisika:RA

nmb a2200000Iu 4500 "120221 2012 eng " 1410-9662 dc Evaluasi Kinerja Metoda Analisis Pengukuran Neutron (APN) Arifin, Zaenal Sasongko, Dwi P Munir, M Evaluation of Neutron Activation Analysis (NAA) methods performance has been done. The objective is to validate the data form these analysis on the determination of the trace element concentration in the waters and sediments. This evaluation covering test of devices stability, background counting, Figure of Merit (FOM), Critical Level (Lc), Detection Limit (LD), Determination Limit (LQ) and test of quality result. Result show that device in stabil condition  have background counting about 0.0037 to 0.1806 cps, Figure of Merit (FOM) about to 0.0045 to 0.1732 secon. The data result analysis above Critical Level (LC), in LC about 0.07 to 16.42 ppb. Detection Limit (LD) about 0.14 to 32.93 ppb in significant 95% expect Hg obtained LD 1.26 ppb. Determination Limit (LQ) about 0.44 to 100.10 ppb. Test of quality result show that of standardized difference about 15.17% to above 50% and Precision result analysis about 0.01% to 99.00%.   Keywords : NAA Methods, Trace element, devices stability, background counting, Figure of Merit (FOM), Critical Level (Lc), Detection Limit (LD), Determination Limit (LQ) and test of quality result. BERKALA FISIKA 2010-10-22 00:00:00 https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/Vol%2013%20%2C%20No.1 BERKALA FISIKA; Vol 13, No 1 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/50738 2022-12-06T10:03:02Z berkala_fisika:ART

nmb a2200000Iu 4500 "221206 2022 eng " 1410-9662 dc UJI NILAI HALF VALUE LAYER (HVL) MENGGUNAKAN PELAT ALUMINIUM BEKAS PADA PESAWAT MAMOGRAFI DI RSUD SYEKH YUSUF GOWA Nurhayati, Siti Mahasiswa Program Sarjana, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Astuty, Sri Dewi Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Dewang, Syamsir Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Hikmawati, Hikmawati Instalasi Radiologi, Rumah Sakit Umum Daerah Syekh Yusuf Gowa, Indonesia Jumriah, Jumriah Balai Pengamanan Fasilitas Kesehatan Makassar, Indonesia Kualitas Berkas Radiasi, Mamografi, HVL, Kaleng Aluminium. Kualitas berkas radiasi adalah salah satu parameter penting yang perlu dikontrol pada pesawat mamografi dan merupakan energi efektif dari sinar-X yang diperlukan utuk menembus suatu objek yang disinari. Penelitian ini menguji dua jenis filter yaitu filter aluminium asli dan filter yang terbuat dari kaleng alumnium bekas untuk menentukan nilai Half Value Layer (HVL). Penelitian ini bertujuan untuk menguji kelayakan filter dari kaleng bekas sprite dengan kemurnian aluminiumnya yaitu 96,827%. Metode yang digunakan adalah metode tidak langsung yaitu dengan melakukan perhitungan setelah penambahan maupun pengurangan tebal filter aluminium dengan variasi tegangan 29, 31, dan 33 kV dan arus waktu 50 mAs. Nilai HVL yang diperoleh filter aluminium asli berkisar antara 0,284-0,364 mmAl, sedangkan untuk filter dari kaleng aluminium bekas antara 0,300-0,396 mmAl. Hasil yang didapatkan menunjukkan bahwa kaleng aluminium bekas layak untuk digunakan sebagai filter dalam pesawat sinar-X mamografi dan nilai HVL dari kedua jenis filter yang digunakan untuk setiap variasi tegangan tabung berada dalam batas toleransi yang ditentukan oleh BAPETEN. BERKALA FISIKA 2022-12-06 10:03:02 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/50738 BERKALA FISIKA; Vol 25, No 3 (2022): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/6580 2014-03-21T15:16:50Z berkala_fisika:EDT

nmb a2200000Iu 4500 "140101 2014 eng " 1410-9662 dc Cover Berkala Fisika Hidayanto, Eko Jurusan Fisika, Universitas Diponegoro Semarang Vol 17 No.1 2014 BERKALA FISIKA 2014-03-21 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/6580 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 1 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3064 2012-04-07T08:46:30Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc PEMBAKARAN FERRALSOL DAN APLIKASINYA UNTUK PENJERNIHAN MINYAK GORENG SISA PAKAI Suhartana, Suhartana Laboratorium Kimia Anorganik F MIPA Universitas Diponegoro Semarang. Ferralsol is tropical type land, which exploited as rice field farm and plantation. Other benefit which can be taken away from  this ferrasol  if burned hence will be able to make liquid cleaner material. Composition of ferralsol is ferralsol orthic and ferralsol plinthic. If burned is good for purification liquid material, inorganic and also organic material. In this research result of combustion from ferralsol, used to make clear ex- cooking oil. Result of which scored a number of peroxide go down 12,75 %, number of acid also go down 8,33 %,   by ferralsol, and a number of peroxide go down 19,45 %, number of acid also go down 10,42 % by burning ferralsol   but with both ex- cooking  oil color become clear progressively.   Keyword: ferralsol, liquid cleaner material BERKALA FISIKA 2012-04-06 10:17:27 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3064 BERKALA FISIKA; Vol 10, No 2 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2775 2012-03-29T11:56:36Z berkala_fisika:RA

nmb a2200000Iu 4500 "120329 2012 eng " 1410-9662 dc Aplikasi Portable Brix Meter untuk Pengukuran Indeks Bias Hidayanto, Eko Jurusan Fisika Universitas Diponegoro Semarang Rofiq, Abdul Jurusan Fisika Universitas Diponegoro Semarang Sugito, Heri Jurusan Fisika Universitas Diponegoro Semarang Measurement of concentration of sucrose (C12H22O11) solution using Portable Brix Meter was analized to determine its refractive index using Abbe refractometer. The materials used are sucrose solution with a concentration of 5%, 10%, 15%, 20%, 25%, 30%, 35% and 40%, and samples fruits of pear, watermelon, orange, apple and melon and others. The concentration of sucrose solution is proportional to the refractive index. The increase of concentration of sucrose solution will increase the refractive index. Correlation between the concentration of sucrose solution with refractive index is expressed by the equation Refractive index of sucrose solution can be determined from its concentration. Keywords:  sucrose solution, concentration, refractive index, portable brix meter BERKALA FISIKA 2012-03-28 21:23:50 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2775 BERKALA FISIKA; Vol 13, No 4 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/61650 2025-01-08T09:17:37Z berkala_fisika:ART

nmb a2200000Iu 4500 "240120 2024 eng " 1410-9662 dc PEMBUATAN DAN PENGUJIAN PROTOTIPE DESALINASI BERTENAGA SURYA YANG DIKOMBINASIKAN DENGAN LAMPU ULTRAVIOLET DAN SISTEM OTOMATIS BERBASIS MIKROKONTROLER Rosyad, Muhammad Sabilul Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Marhaendrajaya, Indras Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Sutanto, Heri Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Seawater, Desalination, LDR Sensor, Heavy Metal The lack of availability of clean water quantitatively is due to 97% of the water on earth is sea water, with a salt content of seawater of around 35000 mg/L causing the water to be unable to be used directly without prior treatment. One of the efforts that can be done to overcome the clean water crisis is through seawater desalination to produce water with low salinity. Several desalination methods that have existed are MSF (Multi Stage Flash Distillation) and Reverse Osmosis. But both of these methods have a high cost. Therefore, we need a method that is cheaper and easier to implement such as distillation. In this research, seawater desalination process uses the distillation method combined with a vacuum pump, electric stove and ultraviolet lamp. The use of a vacuum pump in the distillation system can speed up the evaporation process of seawater. Ultraviolet lamps function to degrade heavy metal pollutants and remove harmful bacteria. To maximize the performance of the tool, an electric stove with an automation system is added with solar panels as its energy source. Analysis of the tests carried out included the construction of the prototype, characterization and calibration of the LDR (Light Dependent Resistor) sensor and Arduino UNO microcontroller, total energy production and use, water production speed, and water quality. The results obtained include a prototype of seawater desalination. The characterization and calibration of the sensor in the automated system that the LDR sensor is running accurately, together with the Arduino UNO microcontroller, the LDR sensor can be an automation system that can make the prototype turn on and off automatically. The use of ultraviolet lamps shows that ultraviolet lamps have a photon energy of 3.0 eV and are able to work in visible light. The use of solar panels as an energy source can make an energy efficient prototype. This tool technology can increase water productivity up to 2 times and water quality shows a decrease in several pollutant parameters in distilled water including TDS (Total Dissolve Solid) of 99.7%, electrical conductivity of 99.987%, salinity of 99.93% , total coliform was 100%, and heavy metals Pb was 82.47%, Cd was 60.33%, Cu was 100%, Fe was 96.1%, Cr was 90.33%, and Zn was 98.9% , and the pH of seawater became neutral from 7.5 to 6.9. This prototype technology has the potential to be applied to the community. BERKALA FISIKA 2024-01-20 16:27:18 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/61650 BERKALA FISIKA; Vol 27, No 1 (2024): Berkala Fisika eng Copyright (c) 2024 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/9295 2015-10-19T16:17:58Z berkala_fisika:RA

nmb a2200000Iu 4500 "141001 2014 eng " 1410-9662 dc DISTRIBUSI DOSIS PHOTON MENGGUNAKAN TEKNIK 3DCRT DAN IMRT PADA RADIASI WHOLE PELVIC KARSINOMA SERVIKS Suhartono, Bambang Haris Instalasi Radioterapi RSUD dr. Soetomo, Jl. Prof. Moestopo 6-8 Surabaya Setia Budi, Wahyu Jurusan Fisika, Universitas Diponegoro, Semarang Hidayanto, Eko Jurusan Fisika, Universitas Diponegoro, Semarang Cancer therapy in carcinoma of the cervix performed with external radiotherapy modalities box beam photon field and 3-Dimension Conformal Radiotherapy (3DCRT) and Intensity Modulation Radiation Therapy (IMRT). IMRT compared with 3DCRT technique on whole-pelvic radiation cervical carcinoma by analyzing the distribution of dose or planning the target volume (PTV) coverage through homogeneity index (HI) and Conformity Index (CI) as well as the organ risk (OAR).This study uses 44 patient data in Installation Radiotherapy Hospital Dr. Soetomo with radiation planning 25x2 Gy of whole pelvic radiation with two planning techniques using the box 3DCRT and IMRT techniques on the angle of rotation 0, 180, 270, and 90 degrees, and then compare the Dose Volume Histograms (DVH) coverage on PTV, rectum and bladder. CI values ​​for the 3DCRT technique (0.812 ± 0.067) and the IMRT technique was (0.799 ± 0.088) values ​​obtained by t test (p = 0.405), whereas for the HI value for 3DCRT technique (1.075 ± 0.079) and the IMRT technique for (1.075 ± 0.079) with values ​​(p = 0.219). Both CI and HI values ​​are not significant. Comparison of percentage of dose on the risk of organ rectum with 3DCRT and IMRT techniques consecutive (80.56 ± 11.21) and (68.14 ± 8.01) with the value (p = 0.00), whereas for bladder organ 3DCRT techniques and consecutive IMRT (80.52 ± 9.22) and (71.94 ± 7.65) with the value (p = 0.00). There is significant value in the percentage of the dose in the rectum and bladder Keywords: Whole pelvic, IMRT, 3DCRT, HI, CI BERKALA FISIKA 2015-10-19 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/9295 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 4 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3080 2012-04-07T12:32:07Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Survei Resistivitas untuk Menentukan Distribusi Tahanan Jenis Batuan Bawah Permukaan Cekungan Daerah Sedimentasi Kuwu Yuana, Taufiq Laboratorium Geofisika, Jurusan Fisika, Universitas Diponegoro Yulianto, Gatot Laboratorium Geofisika, Jurusan Fisika, Universitas Diponegoro Geophysical survey with resistivity method has been done in Bledug area, Kuwu, Grobogan, Central Java which have geology or geophysic phenomena mud blast or mud volcano. The principle resistivity method is measurement resistivity of rock by conducting current and also measure potential difference.This survey using NANIURA Resistivitymeter Model NRD 22S. Resistivity measurement has  been done sounding with schlumberger configuration. The result 3 sounding point, northside, southside and among bledug area. Data processing using IPI version 6.0 for windows program. The result of data processing is thickness and rock resistivity. Final interpretation made with combining sounding data and geology data so that subsurface picture of resistivity distribution. The result of final interpretation shown  bledug area and surrounding is thicknesses which have a distribution resistivity of rock  has the range 0,1-1 Ωm. The conclusion that survey area is flake from salt dome.     Keywords: Bledug Kuwu, resistivity method, mud vulcano BERKALA FISIKA 2012-04-06 10:20:46 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3080 BERKALA FISIKA; Vol 9, No 4 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2862 2012-03-29T12:08:52Z berkala_fisika:EDT

nmb a2200000Iu 4500 1410-9662 dc Sampul Januari 2011 Januari 2011, Sampul Sampul Januari 2011 BERKALA FISIKA 2012-03-29 06:14:46 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2862 BERKALA FISIKA; Vol 14, No 1 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/81651 2026-01-16T08:22:54Z berkala_fisika:ART

nmb a2200000Iu 4500 "260116 2026 eng " 1410-9662 dc MODEL PERANCANGAN DRYER OTOMATIS UNTUK PROSES PENGERINGAN BATIK PRINTING MENGGUNAKAN PEMANAS HALOGEN Asahi, Adam Program Studi Teknik Rekayasa Otomasi Universitas Diponegoro Priyono, Priyono Departemen Fisika Universitas Diponegoro Batik printing, Pengering batik, Pemanas halogen, Mikrokontroler Arduino Industri batik Indonesia berkembang pesat dengan beragam motif dan teknik, termasuk batik printing.  Namun,  proses  pengeringan  masih  menjadi  kendala.  Penelitian  ini  mengevaluasi efektivitas  pengeringan  listrik  berdasarkan  efisiensi  waktu,  perubahan  warna,  dan  kekuatan serat  kain,  serta  potensinya  meningkatkan  produktivitas  dan  efisiensi  produksi  batik  skala besar.  Hasil  perancangan  alat  pengering  batik  berbasis  pemanas  halogen  dengan  kendali mikrokontroler  Arduino  ATmega  menunjukkan  kinerja  stabil  dan  otomatis.  Pengujian menggunakan  pemanas  berdaya  300  watt  dan  motor  DC  berkecepatan  8  rpm  menghasilkan variasi  performa  pada  setiap  set  point  suhu.  Pada  suhu  50  °C,  waktu  pengeringan  tercapai dalam  120  detik.  Peningkatan  suhu  ke  60  °C  membutuhkan  waktu  pengeringan  lebih  lama. Kondisi  paling  optimal  diperoleh  pada  suhu  70  °C  dengan  PWM  30,  menghasilkan  waktu pengeringan  190  detik  dan  kelembapan  akhir  terendah  sebesar  8,1%.  Nilai  ini  lebih  efisien dibandingkan PWM 40 dan 50, yang justru meningkatkan waktu pengeringan serta kelembapan kain. BERKALA FISIKA 2026-01-16 08:22:54 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/81651 BERKALA FISIKA; Vol 28, No 2 (2025): Berkala Fisika eng Copyright (c) 2026 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/10833 2016-04-21T12:14:39Z berkala_fisika:EDT

nmb a2200000Iu 4500 "150701 2015 eng " 1410-9662 dc Berkala Fisika Vol. 18 No. 3 Tahun 2015 Berkala Fisika, Tim Redaksi Jurusan Fisika Universitas Diponegoro Semarang Berkala Fisika Vol. 18 No. 3 Tahun 2015 BERKALA FISIKA 2016-04-21 11:48:02 https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/10833 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 3 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3097 2012-04-07T12:39:01Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc LINIERISASI KELUARAN PENCATU DAYA MENGGUNAKAN KOMPUTER Sumariyah, Sumariyah Lab. Instrumentasi & Elektronika, Jurusan Fisika UNDIP Endro Suseno, Jatmiko Lab. Instrumentasi & Elektronika, Jurusan Fisika UNDIP Arimono, Ibnu Lab. Instrumentasi & Elektronika, Jurusan Fisika UNDIP A power supply with linier output voltage that controlled by computer has been made. The range of output power supply is +2 until +16 volt.             For providing a voltage with a linier output by turning around the potentiometer in the power supply. The potentiometer is turned around by motor stepper that controlled by computer. The step angle of motor stepper is reduced by the gear combination with transmission ratio 59:26. Step angle reduction for mechanical rotate movement are 0.8° per step and with rising of the output power supply 0.1 volt per step.             This system had been realized and can work with voltage that we want and output voltage have a tolerance 0.06 BERKALA FISIKA 2012-04-06 10:20:23 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3097 BERKALA FISIKA; Vol 9, No 2 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2899 2012-03-29T15:40:49Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Analisis Spektrum Atomik dalam Penentuan Temperatur Eksitasi, Temperatur Elektronik dan Densitas Elektron Plasma Argon Nur, Muhammad Jurusan Fisika Fakultas Matematika dan Ilmu Pmengetahuan Alam, Universitas Diponegoro Determination of excitation temperature, electron temperature and density of electron has been done through analysis of the atomic spectrum. Atomic spectrum emitted by the argon plasma with a pressure of 1 MPa. Plasma generated in a corona glow discharge reactor. Excitation temperature (Texc) was obtained by using the Boltzmann distribution and the plasma was assumed to occur in Local Thermodynamic Equilibrium (LTE). Electronic temperature (Te) was obtained by using Saha distribution and taking the ratio between the intensity of the observed spectrum (integrated in the frequency interval) with continuous intensity was observed (not integrated). From the two temperatures, and using the Saha distribution, the density of electron/ion (Ne = Ni) can be determined. Argon plasma which was in LTE condition with a pressure of 1 MPa, Texc = 2877.70 K, Te = 21266.54 K and Ne = Ni = 4.60 x 1021 cm-3 were  obtained   Keyword: Excitation temperature, electron temperature, density of electron, atomic spectrum, corona glow discharge, Boltzmann distribution, Saha distribution, Local Thermodynamic Equilibrium BERKALA FISIKA 2012-03-29 09:57:34 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2899 BERKALA FISIKA; Vol 12, No 3 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/23482 2019-06-25T13:52:35Z berkala_fisika:RA

nmb a2200000Iu 4500 "190529 2019 eng " 1410-9662 dc RANCANG BANGUN SISTEM KENDALI PID UNTUK INTENSITAS CAHAYA LAMPU DC MENGGUNAKAN MIKROKONTROLER ARDUINO UNO Tanza, Nendya Ertika Departemen Fisika Fakultas Sains dan Matematika Universitas Diponegoro Sumariyah, Sumariyah Departemen Fisika Fakultas Sains dan Matematika Universitas Diponegoro BH1750, DC lights, microcontroler, PID, PWM The design of PID (Proportional Integral Derivatives) control system has performed for DC light intensity using an Arduino Uno microcontroller. This research aims to create a DC light intensity control system automatically using Arduino Uno, test the design light intensity control system using PID control and test the stability response of the light intensity control system before and after being given interference in the form of obstructions and external light. The method used in this research is Ziegler-Nichols 1 method to obtain the PID constant. The BH1750 sensor is converted to a digital signal by the BH1750 converter and transmitted to the Arduino Uno microcontroller chip via the I2C interface. The PID constant resulting from the Ziegler-Nichol method approach is used for the experimental approach to manual tuning and determining the cycle of Pulse Width Modulation (PWM). The results of this research obtained 82,42% system accuracy and PID constant, is KP = 0,1; KI = 2,0 and KD = 0,00000102. The built-in lamp light intensity control system is able to stabilize due to interference in an average time of 1 second at 400 lx setpoint. Keywords : BH1750, DC lights, microcontroler, PID, PWM BERKALA FISIKA 2019-05-29 10:45:06 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/23482 BERKALA FISIKA; Vol 22, No 1 (2019): Berkala Fisika Vol. 22 No. 1 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4975 2013-05-27T11:15:54Z berkala_fisika:RA

nmb a2200000Iu 4500 "111001 2011 eng " 1410-9662 dc STUDI UJI ALTERNATIF KUALITAS MINYAK GORENG BERDASARKAN PERUBAHAN POLARISASI CAHAYA TERIMBAS Susan, Ade Ika Jurusan Fisika FMIPA Universitas Diponegoro Firdausi, K Sofjan Jurusan Fisika FMIPA Universitas Diponegoro Setiabudi, Wahyu Jurusan Fisika FMIPA Universitas Diponegoro AbstractIn this research, we report the quality of several cooking oils before and after heating. The parameter of quality was based on electrooptics characteristic or, so called, the change ofpolarization angle induced by external electric field. In this examination, it was used threedifferent brands of cooking oils. The samples were heated in the time interval between 0-120minutes. The electrooptics characteristic was determined by measuring the change ofpolarization angle of light as it passed through the oil while it was applied by external electricfield. The field was produced by two parallel plates connected to different potential between 0-9kV. The light source was diode laser atλ = 650 nm and λ = 532 nm. The quality of oil was then determined by average polarization angle per potential difference, i.e. α ≡ Δθ/ΔV. Based on the result of observation, the fresh oil before heated has smaller change of polarization angle thanoil after heated, which is in agreement to the previous study. The longer heating time is, morefree radicals are produced, which leads to higher polarization. It shows also that the change ofpolarization depends on the wavelength.  From two diode lasers, the effective wavelength toproduce higher number free radicals is obtained by 532 nm. The increasing average ofpolarization angle is linearly to the increasing of heating time. It is obvious that the electroopticsparameter could be proposed as an alternative quality test of cooking oil. Keyword: Cooking oil quality, Change of polarization angle, electrooptics BERKALA FISIKA 2013-05-25 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4975 BERKALA FISIKA; Vol 14, No 4 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2935 2012-03-30T15:03:20Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc OPTIMASI SHIELDING NEUTRON PADA THERMALIZING COLUMN REAKTOR KARTINI Nurlaili, Fidayati Jurusan Fisika Universitas Diponegoro Azam, M. Jurusan Fisika Universitas Diponegoro Firduasi, K. Sofjan Jurusan Fisika Universitas Diponegoro Widarto, Widarto BATAN DIY Shield optimization and the calculation of neutron flux the coming out of the thermalizing column of the Kartini reactor have been conducted.The neutron flux will decrease exponentially as it passes the thermalizing column. The thermalizing column of Kartini reactor consists of many different kinds of shields, i.e, graphite, lead, paraffin and an empty chamber of air, therefore the neutron flux count that is coming out of the thermalizing column can be calculated and the shields within the column can be optimized to give smaller  neutron flux.Calculation result indicates that the neutron flux coming out of the thermalizing column is 2,681×10-11 cacah cm-2s-1. After optimization, the remaining flux coming out of the thermalizing column is 1,042×10-28cacah cm-2s-1. Key words: thermalizing column, Shield, neutron flux BERKALA FISIKA 2012-03-30 14:12:23 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2935 BERKALA FISIKA; Vol 11, No 4 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/27257 2020-06-08T13:09:22Z berkala_fisika:ART

nmb a2200000Iu 4500 "191212 2019 eng " 1410-9662 dc PEMPROGRAMAN MESIN BOR OTOMATIS BERBASIS ATMEGA 328 YANG TERINTEGRASI LCD TOUCHSCREEN NEXTION 3,2 INCHI Ikbal, Muhammad Nur Program Studi DIII Insel, Departemen Fisika, Universitas Diponegoro, Semarang Gunadi, Isnain Program Studi DIII Insel, Departemen Fisika, Universitas Diponegoro, Semarang limit switch, unipolar stepper motor, micro-controller, Nextion LCD touchscreen The aim of this study is to develop an automatic drilling machine based on Atmega328 integrated with the 3.2 inch-Nextion LCD Touchscreen. The drilling machine was designed to automatically determine the distance and the number of holes according to the LCD touchscreen nextion display, both for movement on the Y-axis and X-axis, using a PH268-21 series unipolar of stepper motor and was controlled by a CSD2120P type motor driver. Meanwhile, to perforate the workpiece using an AC motor with a voltage of 220 volts. Machine control used 2 Limit Switches as calculation indicators to be processed by a microcontroller that has been programmed using the Arduino IDE software and displayed on the Nextion LCD touchscreen. From the test it was found that this automation system is very accurate to produce number of holes. The accuracy of distance used as an initial indicator of this automatic drilling machine was 1 mm and it can be changed according to desired needs. Therefore, this automatic drilling machine can provide more effective and efficient results so that it is expected to help in maximizing results for industrial-scale. Keywords: limit switch, unipolar stepper motor, micro-controller, Nextion LCD touchscreen BERKALA FISIKA 2019-12-12 08:25:35 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/27257 BERKALA FISIKA; Vol 22, No 4 (2019): Berkala Fisika Vol. 22 No. 4 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/2978 2012-04-03T12:35:19Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Identifikasi Penyebaran Dan Ketebalan Batubara Menggunakan Metode Geolistrik Resistivitas Yulianto, Tony Jurusan Fisika FMIPA UNDIP Widodo, Sugeng PS Kelautan FPIK UNDIP A Geoelectricity survey using Schlumberger configuration has been conducted in area X of Muara Muntai district, Kutai Kertanegara dictric East Borneo using Schlumberger configuration to probe the existence of coal. Modeling using matching curve to describe subsurface in X area base on 11 points sounding from field data acquisition The result indicates that the coal is within the depth of 60m-70m with a thickness of 1m-2m. Whereas the value of coal resistivity is in the reach 90 Ώm-120 Ώm. It can be then concluded that area X is not prospecting to exploitation.   Keyword: Schlumberger configuration, coal, resistivity BERKALA FISIKA 2012-04-03 11:52:36 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2978 BERKALA FISIKA; Vol 11, No 2 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/30623 2020-06-08T16:06:35Z berkala_fisika:ART

nmb a2200000Iu 4500 "200430 2020 eng " 1410-9662 dc ANALISIS DIMENSIONALITAS DATA MAGNETOTELURIK LAPANGAN PANAS BUMI “SA” BERDASARKAN METODE TENSOR FASE Akbar, Shofya Mahasiswa S1 Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Setyawan, Agus Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Yulianto, Tony Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Baroek, Marino Christiano Divisi Subsurface PT Supreme Energy, Jakarta Selatan Ramadhan, Irvan Divisi Subsurface PT Supreme Energy, Jakarta Selatan magnetotelluric, geoelectric strike, dimentionality, tensor fase, "SA" geothermal field Magnetotelluric (MT) method is one of a passive electromagnetic method in geophysics. Principally MT measures the temporal variation of the electromagnetic field that is induced to the surface of the earth to get the subsurface resistivity structure. Information about the geoelectric strike and dimensionality of the magnetotelluric data is important to modelling the subsurface structure. Information is used to determine the 1D, 2D or 3D approach that can be used to interpret MT data. Therefore, an aim of study is to identify the direction of the geoelectric strike and dimensionality structure in the "SA" geothermal field. The data were used is secondary data that has been corrected using shift correction. Phase tensor method was used to analysis the dimensionality of magnetotelluric data. Principally the phase tensor method is to determine the dimensionality by looking the difference between maximum and minimum phase that can be describe the main direction of structure in the field area. The results of geoelectric strike analysis and the dimensionality of the magnetotelluric field data for the "SA" geothermal field show the direction of geoelectric strike N345oE or N15oW with 1D, 2D and 3D dimensionality structures. BERKALA FISIKA 2020-06-08 15:31:49 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/30623 BERKALA FISIKA; Vol 23, No 2 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5002 2013-05-27T15:53:20Z berkala_fisika:RA

nmb a2200000Iu 4500 "130101 2013 eng " 1410-9662 dc KAJIAN RADIOGRAFI DIGITAL TULANG TANGAN Susilo, Susilo Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Semarang (UNNES), Indonesia Setiabudi, Wahyu Jurusan Fisika, Fakultas Sains dan Matematika Universitas Diponegoro (UNDIP)Semarang, Indonesia Kusminarto, Kusminarto Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Gajah Mada (UGM) Yogyakarta, Indonesia Suparta, G. B. Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Gajah Mada (UGM) Yogyakarta, Indonesia Teknologi diagnostik medis yang digunakan pada unit radiologi di rumah sakit sudahcenderung bergeser dari teknologi analog berbasis film menjadi teknologi digital (filmless). Salahsatu cara membuat system radiografi tanpa film adalah dengan cara konversi digital menggunakantabung kedap cahaya (light tight tube). Dalam penelitian ini, kami telah mengkaji kemungkinanpemanfaatan sistem pencitraan radiografi digital sinar-x berbasis X-Ray Intensifying Screen(XRIS) dihubungkan dengan perangkat frame-grabber. Hasil eksperimen tahap awal untukmemperoleh radiograf tulang tangan menunjukkan bahwa sistem ini cukup dioperasikan padategangan anode-katode 50 kV, arus waktu filamen 50 mAs dan waktu paparan 0,1 detik untukmenghasilkan citra yang cukup dapat dilihat. Untuk sekali paparan, dimungkinkan memperolehbeberapa citra untuk obyek yang sama pada posisi tetap, tipa-tiap citra mengandung informasiradiografi berbeda ditunjukkan oleh distribusi tiap citra yang bervariasi. Hasil ini menunjukkanbahwa sistem ini diharapkan lebih efisien dan lebih efektif dibandingkan dengan metodekonvensional berbasis film, dan dapat dikembangkan untuk diagnose mineral tulang. Kata kunci: radiografi digital; filmless; sinar-x; tulang tangan BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5002 BERKALA FISIKA; Vol 16, No 1 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3002 2012-04-04T07:37:38Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pembuatan ADC (Analog to Digital Converter) Untuk Rancang Bangun Instrumentasi Temperatur Tinggi Menggunakan Prinsip Defleksi Laser He-Ne Sebagai Bagian Dari Sistem Kendali Operasi Di Bidang Industri Kadarisman, Nur Jurusan Pendidikan Fisika FMIPA, UNY Sumarna, Sumarna Jurusan Pendidikan Fisika FMIPA, UNY Rosana, Dadan Jurusan Pendidikan Fisika FMIPA, UNY Monitoring and control all process variables such as power, temperature, and pressure is an absolute necessity in the field of industry. Instrumentation is a tool that can be used to monitor and control the process variables. From the monitoring results it can be seen whether the system is running in accordance with the desired or not. If deviation occurs, then the control action is needed so that the process can run as expected (the operating control system). One of the instrumentation equipment that need to be investigated is the use of laser deflection, because the laser beam that has a coherent nature, so that this instrumentation can be a very useful tool in the industry. At that stage the second year of this research study focused on the process input and data analysis with the aid of a microcontroller as a stage before applied in the modeling industry. The study was conducted in two stages, namely the manufacture of the ADC program that can send data voltage to the computer via RS 232 serial cable and making the ADC data acquisition software in the computer so the computer can act as a collection station, storage, and display data. This software use Borland Delphi 7. The results showed that the graph can be known voltage variations can indicate changes in certain deflection. The value of this deflection will determine the temperature of which is shown by the graph. Changes in the analog signal from the source of the potentiometer into a digital signal using ADC is inversely proportional, which is indicated by a linear graph with a correlation R = 0.99079 Graph showing the relationship between deflection with temperature according to the graph of the results of previous years of research that is done manually. Thus, further stay pending the outcome of the development of an acceptable deflection pattern detector equipped with a data acquisition system, as the final stage before implemented in the industry. Data acquisition system consists of two parts: signal conditioning systems and interfaces. If the detector is subjected by a laser beam, the optical signal is converted into electrical signals. This causes an electrical current. Because the electric current generated by the detector is very small, it needs to be strengthened and transformed into voltage by a signal conditioning system.Temperatures are measured in a particular room will cause the laser beam deflection at a certain distance so it can be used for high temperature control system.   Keywords: ADC, Instrumentation, He-Ne Laser, Borland Delphi BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3002 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/39829 2021-07-05T11:38:49Z berkala_fisika:ART

nmb a2200000Iu 4500 "210705 2021 eng " 1410-9662 dc PENGARUH ENERGI AKTIVASI TERHADAP AKTIVITAS NANOPARTIKEL ZnFe2O4 PADA ADVANCED OXIDATION PROCESSES (AOPs) SEBAGAI PENGURAI RHODAMINE B Kadarisman, Kadarisman Departemen Fisika, Universitas Diponegoro, Semarang Nurhasanah, Iis Departemen Fisika, Universitas Diponegoro, Semarang AOPs, nanopartikel ZnFe2O4, fotokatalis, foto-Fenton-like, sono-fotokatalis Advanced  Oxidation  Processes  (AOPs)  is  one  of  the  methods  used  to  treat  organic  dye  waste. Powder-based  AOPs  as  photocatalyst  have  disadvantages  due  to  surface  adsorption  and agglomeration, thereby reducing the percentage of dye decomposition. In this study, the addition of  chemical  energy  (photo-Fenton-like)  and  ultrasonic  waves  (sono-photocatalyst)  in  the photocatalyst process was used to increase the activity of powder-based photocatalyst material as a  decomposer  of  Rhodamine  B  organic  dye.  The  photocatalyst  material  used  was  ZnFe2O4 nanoparticles synthesized using precipitation method with a calcination temperature of 700oC for 3 hours. The combination of light energy (4.69 eV) and chemical energy (44 meV) in the photo- Fenton-like process showed the highest percentage of Rhodamine B decomposition (70%). The use of  ultrasonic  energy  (28  meV)  in  the  sono-photocatalyst  process  increases  the  rate  of decomposition  of  RhB  by  2  times.  The  addition  of  chemical  energy  (44  meV)  increased  the photocatalyst activity of ZnFe2O4 nanoparticles on decomposition of RhB by 8 times. The results showed that the addition of chemical energy to the photocatalyst  activity of ZnFe2O4 was much more efficient than the addition of ultrasonic energy. BERKALA FISIKA 2021-07-05 11:38:49 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/39829 BERKALA FISIKA; Vol 24, No 1 (2021): Berkala Fisika eng Copyright (c) 2021 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5217 2013-07-28T15:33:30Z berkala_fisika:EDT

nmb a2200000Iu 4500 "130401 2013 eng " 1410-9662 dc Berkala Fisika Berkala Fisika, Tim Editorial Jurusan Fisika Fakultas Sains dan Matematika Universitas Diponegoro Semarang Berkala Fisika Vol 16 No. 2 Tahun 2013 BERKALA FISIKA 2013-07-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5217 BERKALA FISIKA; Vol 16, No 2 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3042 2012-04-07T12:47:29Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Model Pembelajaran Untuk Meningkatkan Keterampilan Proses Ipa-Asesmen Dan Pembelajaran Tematik Calon Guru Sekolah Dasar Siahaan, Parsaoran Jurusan Pendidikan Fisika- Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam Universitas Pendidikan Indonesia Liliasari, Liliasari Program Pendidikan IPA Pasca Sarjana Universitas Pendidkan Indonesia This research is part of a series of research and development to improve the mastery learning model of prospective elementary school teachers in science and pembelajarannya.Model learning concepts developed in this research is the learning model that integrates two different courses are semester courses the concept of science and science education. Scenario learning is done in four phases, namely: (1). Modeling phase, (2) phase of discussion, (3). Enrichment phase, and (4) peer learning phase. The study was conducted on students of teacher candidates in two PGSD who take shelter in the Indonesian Education University of PGSD X sekota with the University and PGSD Y berdomosili in other cities within the same province.Subjects consisted of 25 students in PGSD X prospective teachers and 26 student teacher candidates at PGSD Y. The material consists of three pairs of research topics Magnet-Process Skills Science, Electrical-assessment in learning science and food-Thematic Learning. The research instrument used in the form of multiple choice tests and Description. Analysis of data using <g> dinormalisir gain from Hake. Research shows <g> PGSD X student teacher candidates related to science process skills and assessment including the classification was 0.57 ± 0.10 and high classification in thematic learning that is equal to 0.70 ± 0.14, whereas <g> student-teacher candidates PGSD Y including the classification is to Skills Assessment Process science and is equal to 0.68 ± 0.07, and medium for learning thematic classification that is equal to 0.53 ± 0.20. From <g> acquisition can be concluded that student teacher candidates PGSD PGSD Y better than X in Science Process Skills - Assessment, but lower in the Thematic learning.   Key words: learning model, prospective teachers, science process skills, assessment, thematic. BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3042 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/46863 2022-06-13T14:40:23Z berkala_fisika:ART

nmb a2200000Iu 4500 "220613 2022 eng " 1410-9662 dc ANALISATOR DIGITAL BERBASIS MIKROKONTROLER ATMega 328P U., Gema Nuran Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Sumariyah, Sumariyah Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Firdausi, K. Sofjan Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Pada  penelitian  ini  telah  dibuat  instrumen  analisator  digital  berbasis  mikrokontroler ATMega328P.  Instrumen  tersebut  menggunakan  stepper  motor  sebagai  aktuator  dan dihubungkan  pada  tiga  gear  yang  saling  bersinggungan  dengan  rasio  jari-jari  tertentu,  untuk pusat pengendalian dan pemroses data digunakan mikrokontroler ATMega 328P dengan OLED sebagai piranti penampil sudut. Pengujian sudut hasil bacaan skala busur dan tampilan OLED Instrumen  terhadap  Langkah  stepper  motor  diperoleh  hasil  (y=0,1215x - 0,0227 )  dengan  nilai  R2 sebesar 0,9998 dan untuk pengukuran yang mengacu pada tampilan OLED menghasilkan fungsi (y=0,123x )  dengan  nilai  R2  adalah  1.  Pengujian  instrumen  Analisator  Digital  dengan  panjang gelombang laser sebesar 532 nm menggunakan  Hukum Malus  menghasilkan skala terkecil 0,1° untuk rentang pengukuran 0°-90° dengan interval 100. BERKALA FISIKA 2022-06-13 14:40:23 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/46863 BERKALA FISIKA; Vol 25, No 1 (2022): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/6575 2014-03-21T15:22:15Z berkala_fisika:RA

nmb a2200000Iu 4500 "140101 2014 eng " 1410-9662 dc Studi Analisis Echo Train Length dalam K-Space Serta Pengaruhnya Terhadap Kualitas Citra Pembobotan T2 FSE pada MRI 1.5 T Simanjuntak, Josepa ND Program Sudi Magister Ilmu Fisika, Universitas Diponegoro Semarang Nur, Muhammad Jurusan Fisika Universitas, Diponegoro Semarang Hidayanto, Eko Jurusan Fisika Universitas, Diponegoro Semarang The influence of echo train length (ETL) toward image quality of sagital lumbal on MRI using T2-weighted FSE was analyzed on 20 images from four patients. Quantitative data analysis was performed using ROI two methods: image processing method on MRI’s computer and using matlab software, then conducted the statistical test. The result of SNR from these two methods obtained the highest value of SNR at CSF tissue and the highest value of CNR at CSF-corpus tissue and CSF-medulla spinalis with ETL=16. From statistical test of SNR result directly from MRI’s computer image was obtained the significant value at corpus tissue = 0.603, CSF = 0.082, and Fat = 0.213 (P > 0,05), discus = 0.022, Medulla Spinalis (MS) = 0.010 (P < 0.05), and for CNR result of CSF-corpus tissue has significant value = 0,023, corpus-MS = 0.011 (P < 0.05). By using matlab programming method obtained significant SNR result at corpus tissue = 0.000, CSF = 0,000, Fat = 0,000, discus = 0,000, Medulla spinalis = 0,000 (P < 0,05), and for the CNR result of Dicus-corpus tissue has significant value = 0.044, Dicus-MS= 0.045 (P , 0.05). These results pointed out that ETL and T2 weighted influence the Image quality of MRI, which are the image contrast at FSE and software ability of matlab to analyze the image quality of MRI. SNR and contrast are important aspect in the process of image optimization, the higher SNR value provide the better image in giving diagnose information. Keywords : MRI, Echo train length (ETL), K-space, Fast spin echo, Contras to noise ratio, Signal to noise ratio. BERKALA FISIKA 2014-03-21 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/6575 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 1 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3059 2012-04-07T08:42:53Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Rancang Bangun dan Pengujian Sistem Reaktor Plasma Lucutan Pijar Korona guna Mempercepat Pertumbuhan Tanaman Mangrove Triadyaksa, Pandji Jurusan Fisika FMIPA Universitas Diponegoro Nur, Muhammad Jurusan Fisika FMIPA Universitas Diponegoro Nasrudin, Nasrudin Universitas Kristen Satya Wacana Wasiq, J. Jurusan Biologi FMIPA Universitas Diponegoro Plasma glow discharge corona reactor system has been made and tested to stimulate mangrove growth. Plasma glow discharge corona reactor consists of DC high voltage system and point to plate electode system. Reactor performance test has done on Rhizophora apiculata mangrove species. High voltage system mainly develop using TV fly back that been triggered by pulsed frequency using oscillator circuit. Point to plane electrode system was designed to maintain two electrode range remains 3 cm with number of point electrode plugged parallel with plane electrode are 63 pieces. Plasma glow discharge corona reactor tested  was done on radiation process of mangrove seed by divided sample groups into 6 sample which have different time radiation and 1 sample that not been radiated as a control data. Mangrove growth was analyzed by measure the growth of mangrove plumulae after 17 days of cultivation. Research results shows that in developing plasma glow discharge corona to radiate mangrove, plasma reactor system works in 8 kV DC plasma voltage development. Mangrove growth after 6 time variation of plasma radiation shows a good effect of growth stimulation along with longer radiation time duration.  The increase of mangrove growth was hypothetically caused by an increase of nitrogen concentration in mangrove seeds because of ion nitrogen fixation in the seeds during plasma radiation process BERKALA FISIKA 2012-04-06 10:17:20 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3059 BERKALA FISIKA; Vol 10, No 3 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2707 2012-03-29T15:32:53Z berkala_fisika:RA

nmb a2200000Iu 4500 "120329 2012 eng " 1410-9662 dc Arus Terobosan Pada Transistor Dwikutub Struktur Hetero Si/Si1-xGex/Si Anisotropik Melewati Basis Tergradasi (Graded Base) Hasanah, Lilik Jurusan Fisika, Universitas Pendidikan Indonesia, Jl.. Dr. Setiabudhi No 229 Bandung Telp : +62(022)2504548 Khairurrijal, Khairurrijal Kelompok Keahlian Fisika Material Elektronik Program Studi Fisika, FMIPA-ITB Jl. Ganesa 10 Bandung 40212, Telp./Fax. : +62(022)2511848 Tunneling current in bipolar transistors Si/Si1-xGex/Si anisotropic hetero structure for germanium conditions on a constant basis is not analyzed here. The concentration of germanium in the base which is not constant will result in the potential profile at the base is not flat, but will be graded according to the germanium concentration. Tunneling current calculation is performed semi-analytically and numerically. The calculation result obtained then matched with experimental data. The results show that the results of analytical calculations with results of semi-numerical calculations. While analytical calculations with experimental data only flows from the VBE 0.3 to 0.6 V.   Keywords: Tunneling current, germanium concentration, anisotropic material, transfer matrix method, hetero structure bipolar transistor BERKALA FISIKA 2012-03-28 21:38:25 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2707 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/60738 2023-12-17T10:05:13Z berkala_fisika:ART

nmb a2200000Iu 4500 "231217 2023 eng " 1410-9662 dc PEMANAS INDUKSI UNTUK BALL BEARING DIAMETER NOMINAL 15,17, DAN 20 MM Mohamad, Febriyan Azril Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro Tadeus, Dista Yoel Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro Mangkusasmito, Fakhruddin Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro Putranto, Ari Bawono Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro Bearing, Induction Heater, NodeMCU ESP 8266, Themperature, PID, Inner Ring Bearing is an important component in supporting engine performance. However, according to a study  by  Svenska  Kullager  Fabriken  (SKF),  bearings  are  also  one  of  the  components  that  most often cause 40% of engine damage. Bearing damage occurs during installation which is still done manually, namely being hit which results in high friction on the wheel axles. To overcome this, a tool is made with the heating method to carry out bearing installation which utilizes expansion of the  bearing.  Induction  heating  device,  is  a  solution  for  heating  bearings  which  has  not  been produced in Indonesia. Therefore, an induction heating system was created for heating bearings using the NodeMCU ESP8266 microcontroller as a controller and using a type k thermocouple temperature sensor as a temperature detector with the PID method. The use of this PID method as a  heating  temperature  control  when  it  reaches  the  desired  set  point,  the  heating  process  will automatically stop. The objects used are bearings with inner rings of 15mm, 17mm and 20mm. By making this induction heater, the performance of the tool is obtained with an average heating time to reach a set point temperature of 100OC is 3.64 minutes. BERKALA FISIKA 2023-12-17 10:05:13 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/60738 BERKALA FISIKA; Vol 26, No 2 (2023): Berkala Fisika eng Copyright (c) 2023 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/8879 2015-08-01T18:11:54Z berkala_fisika:RA

nmb a2200000Iu 4500 "140701 2014 eng " 1410-9662 dc DEPOSISI LAPISAN TIPIS ZnO:Ag DAN APLIKASINYA UNTUK DEGRADASI POLUTAN ORGANIK Anngita, Sheilla Rully Prodi Magister Ilmu Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Sutanto, Heri Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Zinc Oxide (ZnO) is a semiconductor material that is used for photo-catalyst to degrade organic pollutants. The addition of doping silver (Ag) in ZnO can increase the photo-catalytic activity in the degradation process. In this study, the addition of doping Ag in ZnO thin film on a glass substrate deposition using thermal spray coating method has influence on the micro-structure and photo-degradation in presence of bacteria Escherichia coli (E. coli) as an organic pollutants has been investigated. Micro-structure of ZnO : Ag layer were characterized by Scanning Electron Microscopy (SEM) and photo-degradation activities of bacteria were tested with Total Plate Counter (TPC). The results show that doping Ag in ZnO give affect the topography of the surface that can increase in amount of grains and grain size in order to increase the photo-catalytic activity. It indicated by decrease in amount of E. coli bacteria from the initial sample with percentage of degradation is 99,99951% Keyword: Semiconductor, photo-catalyst, ZnO, doping Ag, micro-structure, photo-degradation BERKALA FISIKA 2015-08-01 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/8879 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 3 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3075 2012-04-07T08:52:55Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Estimasi Arah Strike menggunakan Metode Resistivitas Konfigurasi Persegi Cahyono, Agung Laboratorium Geofisika Jurusan Fisika Universitas Diponegoro Yulianto, Gatot Laboratorium Geofisika Jurusan Fisika Universitas Diponegoro The sounding square array resistivity method had been used to estimate strike orientation in a sub surface anomaly model. The advantage of square array are more sensitif in an anisotropic medium such as strike than inline array. Strike is an important factor to placed an array configuration in resistivity method. The array commonly lay down paralel or perpendicular with a strike depend on anomaly structure. The mapping square array was used to detect the model anomaly.The sounding square array were measured by rotating array with azimuth ,,, and . The sounding square array had an electrode spacing 1 m, 1,4 m, 2 m and 2,8 m. Azimuthal apparent resistivity was  obtained by calculation and then was plotted into Rossete diagram. The estimation of strike orientation was determined perpendicularly from maximum azimuthal apparent resistivity. The mapping square array used 10 m array spacing with 1 m electrode spacing. The Wenner array used 5 m with 0,5 m electrode spacing.Strike orientation was estimated on N 90 E. This estimation was based on result each electrode spacing on the sounding square array. The existing model anomaly were detected on 5 m until 7 m on mapping square array. The result of Wenner array modeling showed that anomaly model was detected on 2,5 m until 3,5 m on N 40 W. This result showed that the sounding square array can be applied to determine strike orientation which usually exist on geological structure Keywords: square array resistivity, strike,azimuth BERKALA FISIKA 2012-04-06 10:17:48 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3075 BERKALA FISIKA; Vol 10, No 1 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2821 2012-03-29T12:12:25Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc MEASUREMENT OF VISCOSITY AND SUCROSE CONCENTRATION IN AQUEOUS SOLUTION USING PORTABLE BRIX METER Hidayanto, Eko Departement of Physics, Diponegoro University, Semarang, Indonesia Tanabe, Teruo Department of Materials Science and Engineering, Kyoto University, Japan Kawai, Jun Department of Materials Science and Engineering, Kyoto University, Japan The viscosity of aqueous sucrose solution in various concentrations and the sugar content were measured by using an Ostwald viscometer and a commercial available of portable Brix meter respectively. The increasing of the concentration of sucrose would also followed by increasing viscosity of the solution. Depending on their concentration, the measured value of viscosity of solution would be automatically confirmed into the desired concentration unit. The suitability of Brix meter for other application will be checked. BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2821 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/75301 2025-07-01T01:08:35Z berkala_fisika:ART

nmb a2200000Iu 4500 "250630 2025 eng " 1410-9662 dc PENGARUH AKTIVASI ZnCl2 TERHADAP SIFAT FISIS DAN ELEKTROKIMIA ELEKTRODA KARBON DAUN PRASMAN (EUPOTORIUM TRIPLINERVE V) SEBAGAI SEL SUPERKAPASITOR Nahda, Nidia Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin Armynah, Bidayatul Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Riau, Indonesia Karbon aktif, Biomassa, Kapasitansi, Daun Prasman, Superkapasitor. Energi terbarukan menciptakan sejumlah listrik dengan variasi yang berbeda dan sulit diprediksi. Penetrasi yang luas ini dilakukan sebagai cara untuk menghemat energi. Salah satu faktor utama yang telah mendorong kemajuan pesat dalam sistem elektrokimia adalah pengembangan dua perangkat penting, yaitu baterai dan superkapasitor. Penelitian ini pembuatan karbon aktif dari daun prasman melalui proses karbonisasi pada suhu 600°C selama 1 jam dengan variasi aktivasi ZnCl2 0,1 M, 0,2 M dan 0,3 M.  Kerakteristik yang dilakukan meliputi analisis densitas, Fourier Transform Infrared (FTIR), X-Ray Diffraction (XRD), dan Cyclic Voltammetry (CV). Hasil anasis densitas menunjukkan bahwa setiap pertambahan aktivasi, nilai massa jenis yang dihasilkan mengalami penurunan. Gugus fungsi spektrum FTIR memperlihatkan adanya ikatan C yang terbentuk. Analisis XRD menunjukkan adanya struktur amorf baik sebelum maupun sesudah pirolisis.  Sifat elektrokimia dari karbon daun prasman menunjukkan bahwa proses difusi yang berlangsung semakin baik seiring tinggi aktivator. Nilai kapasitansi spesifik elektroda sel superkapasitor daun prasman diperoleh hasil kapasitansi spesifik tertinggi terdapat pada aktivator 0,2 M yaitu 102,15 F/g. BERKALA FISIKA 2025-06-30 09:08:52 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/75301 BERKALA FISIKA; Vol 28, No 1 (2025): Berkala Fisika eng Copyright (c) 2025 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/9666 2015-12-08T10:02:10Z berkala_fisika:RA

nmb a2200000Iu 4500 "150401 2015 eng " 1410-9662 dc PENGARUH GAIN TERHADAP FWHM DAN FWTM PADA CITRA B-MODE ULTRASONOGRAM (USG) Amitasari, Ria Jurusan Fisika, Universitas Diponegoro, Semarang Suryono, Suryono Jurusan Fisika, Universitas Diponegoro, Semarang Adi, Kusworo Jurusan Fisika, Universitas Diponegoro, Semarang FWHM, Gain, Point Spread Function, Spatial resolution, USG The effect of gain to The Width at Half Maximum (FWHM) and Full Width at Tenth Maximum (FWTM) on B-mode image ultrasonogram (USG) has been investigated. The aim of this research is to determine the effect of gain on the spatial resolution according the measurements of FWHM and FWTM. The evaluated resolution type is axial and lateral. This research used phantom multipurpose multi tissue with gain (30 dB, 35 dB, 40 dB, 45 dB, 50 dB, 55 dB and 60 dB) on frequency variation source 6,2 Mhz, 8 MHz dan 10MHz. The axial and lateral resolution images were obtained by using USG which uses B-Mode imaging. The measurement was made by using digital image and calculated objectively with MATLAB. The measurement of FWHM and FWTM was obtained from IP-PSF analysis (In Plane-Point Spread Function) using approximation for the Gaussian function. The result shows that there is influence from gain on FWHM and FWTM. The decreasing gain resulted in decreasing of FWHM and FWTM. The decreasing of FWHM and FWTM represents better spatial resolution, and vice versa. Keywords: FWHM, Gain, Point Spread Function, Spatial resolution, USG, BERKALA FISIKA 2015-12-08 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/9666 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 2 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3092 2012-04-07T12:36:38Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Uji Nilai Tahanan Jenis Polutan Air Laut Dengan Metode Ohmik Dan Geolistrik Tahanan Jenis Skala Laboratorium Dwi Indriana, Rina Laboratorium Geofisika FMIPA Universitas Diponegoro Danusaputro, Hernowo Laboratorium Geofisika FMIPA Universitas Diponegoro Geoelectric method and ohmic method used to investigate sea water intrution (salinity) in aquifer layer.Resistivity data aquisition for 3 layer model and 3 concentration of salinity was in laboratory scale. By comparing resistivity data before and after adding sea water we get resistivity value for each layer. The research result is decreasing of resistivity value for increasing salinity concentration.    BERKALA FISIKA 2012-04-06 10:20:34 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3092 BERKALA FISIKA; Vol 9, No 3 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2877 2012-03-29T14:25:06Z berkala_fisika:EDT

nmb a2200000Iu 4500 1410-9662 dc Cover April 2011 April 2011, Cover Cover Berkala Fisika, Vol. 14, No. 2, April 2011 BERKALA FISIKA 2012-03-29 11:12:16 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2877 BERKALA FISIKA; Vol 14, No 2 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/12806 2016-12-16T09:51:47Z berkala_fisika:EDT

nmb a2200000Iu 4500 "151001 2015 eng " 1410-9662 dc Berkala Fisika Vol. 18 No. 4 Tahun 2015 Berkala Fisika, Tim Redaksional Jurusan Fisika, Fakultas Sains dan Matematika Universitas Diponegoro Berkala Fisika Vol. 18 No. 4 Tahun 2015 BERKALA FISIKA 2016-12-16 09:09:59 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/12806 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 4 Tahun 2015 eng Copyright (c) 2016 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5012 2013-05-27T16:28:14Z berkala_fisika:EDT

nmb a2200000Iu 4500 "120101 2012 eng " 1410-9662 dc Berkala Fisika Berkala Fisika, Tim Redaksi Jurusan Fisika Fakultas Sains dan Matematika Universitas Diponegoro Semarang Berkala Fisika Vol 15 No. 1 (2012) BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5012 BERKALA FISIKA; Vol 15, No 1 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2930 2012-03-30T14:27:40Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Rancang Bangun Detektor Gerak Menggunakan Infra Merah Dengan Memanfaatkan Layanan Sms Pada Telepon Seluler Berbasis Mikrokontroler AT89S52 Widiyatmoko, Anjar Jurusan Fisika Universitas Diponegoro Sumariyah, Sumariyah Jurusan Fisika Universitas Diponegoro A infrared movement detector using Short Message Service based on AT89S52 microcontroller has been designed and realized. The detector can be used for monitoring any passing object in the room. This research can be used to detect up to four object in the different room. The detector was consisted one control station and one receiver station. The control station used four couple of infrared transmitter and receiver. The receiver station of mobile station was used to receive message from control station. This detector was consisted of hardware and software. The hardware was designed with infrared transmitter, an 38 kHz infrared sensor, an op-amp comparator  used to compare infrared sensor output voltage. The Transmitter emitted infrared ray and received by  sensor. Any moving object passed between them producing the output voltage of infrared receiver  change and  proceed to comparator resulting high output. This high output signal used as trigger event to running sending message procedure. And the designed software for microcontroler was written in C language. The research showed the passed object passed infrared transmitter can be detected is received and the SMS by mobile station is matched  as the location of passing object through the infrared sensor.   Keywords: Short Message Service, Microcontroller, Infrared BERKALA FISIKA 2012-03-29 14:56:20 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2930 BERKALA FISIKA; Vol 12, No 1 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/25482 2019-09-17T16:44:21Z berkala_fisika:ART

nmb a2200000Iu 4500 "190917 2019 eng " 1410-9662 dc PENGARUH ARUS TABUNG TERHADAP NOISE DAN KONTRAS CITRA PADA PESAWAT CT SCAN Riyanto, Slamet Instalasi Radiologi Rumah Sakit Sultan Agung, Semarang, Jawa Tengah Budi, Wahyu Setia Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang, Jawa Tengah Anam, Choirul Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang, Jawa Tengah tube current, image noise, low contras resolution, axial scanning, CT scan This study aims to evaluate the effect of tube current on noise and low contrast resolution in CT scan images. Determination of the noise and the low contrast resolution was carried out using the built-in phantom of CT scan. To determine the noise, a phantom section consisting of homogeneous water (water filled phantom) was used, and to determine the low contrast resolution, a phantom section consisting of a polystyrene box was used. The images were taken in an axial mode, using a voltage of 120 kVp, rotation time of 2 seconds, beam collimation of 10x2.5 mm, and slice thickness of 7 mm. The tube current was varied from 80 mA to 200 mA. At each scanning, 3 (three) slices were taken. The results show that an increase of the tube current from 80 mA to 200 mA causes a decrease in THE noise, but does not affect TO the low contrast resolution. At the same low contrast resolution, an increase of the noise decreases object detectability. Keywords: tube current, image noise, low contras resolution, axial scanning, CT scan BERKALA FISIKA 2019-09-17 16:39:09 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/25482 BERKALA FISIKA; Vol 22, No 3 (2019): Berkala Fisika Vol. 22 No. 3 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4986 2013-05-27T14:17:30Z berkala_fisika:RA

nmb a2200000Iu 4500 "120401 2012 eng " 1410-9662 dc APLIKASI IMC BERBASIS STRATEGI PENALAAN PENGENDALI PID DIGITAL PADA SISTEM PEMANAS UDARA Khuriati RS, Ainie Laboratorium Instrumentasi Elektronika , Jurusan Fisika , Universitas Diponegoro This paper investigated  an application of the methodology that was developed by Rivera, a methodology to obtain reduced-order models that satisfy the Prett-Garcıa digital PID tuningrules, using prefiltered ARX estimation as a  basis. The  method was applicated as the temperaturecontrol system on theair heater. IMC-PID controller is not only superior but it has a simple andgeneral structure such as that of a PID controller too. Keywords:  PID digital , IMC, ARX model. BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4986 BERKALA FISIKA; Vol 15, No 2 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/30615 2020-06-08T15:23:16Z berkala_fisika:ART

nmb a2200000Iu 4500 "200131 2020 eng " 1410-9662 dc UJI KESESUAIAN STANDAR NILAI HVL FILTER ALUMINIUM PADA PESAWAT SINAR-X MAMMOGRAFI: STUDI KASUS DI RUANG INSTALASI RADIOLOGI RS. SILOAM MAKASSAR Mutmainna, Azri Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Makassar Astuty, Sri Dewi Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Makassar Dewang, Syamsir Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Makassar Mulyadin, Mulyadin BPFK, Makassar, Sulawesi Selatan mammography, HVL value, the quality of radiation The quality control of X-ray radiation in a radiology device plays an important role in determining the clinical use feasibility. The HVL value test of a filter is very important because it determines the effective of X-ray energy. HVL values indicate the thickness of the absorbent material to absorb X-ray intensity up to half of its original intensity. This research is devoted to testing the feasibility of Mammography equipment in the radiology installation room of Siloam Makassar hospital by comparing two methods of determinations the HVL value in the variation of voltage 23, 25, 27, 29, 31 and 33 kVp. The HVL value that determined from direct methods without filters is used as a base value that to be compared with the HVL value which determined by indirect methods through calculations after the addition of aluminum filter thicks to gradually. HVL values by indirect measurements ranged from 0.268−0.401 mmAl, while by direct measurements between 0.291−0.338 mmAl with a deviation between 1.39−7.90%. The results obtained indicate that the HVL value for all X-ray tube voltage variations from the two methods in use still on ranges the tolerance standard so that it can be reported that the X-ray mammography at the Siloam hospital was declared feasible. BERKALA FISIKA 2020-06-08 13:14:30 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/30615 BERKALA FISIKA; Vol 23, No 1 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4997 2013-05-27T16:00:59Z berkala_fisika:RA

nmb a2200000Iu 4500 "121001 2012 eng " 1410-9662 dc PEMBUATAN KURVA ISODOSIS PAPARAN RADIASI DI RUANG PEMERIKSAAN INSTALASI RADIOLOGI RSUD KABUPATEN KOLAKA - SULAWESI TENGGARA Syahria, Syahria instalasi radiologi (radiodiagnostik) RSUD kabupaten Kolaka - Sulawesi Tenggara Setiawati, Evi Laboraturium Fisika Atom dan Nuklir Jurusan Fisika UNDIP Firdausi, K Sofjan Laboraturium Fisika Atom dan Nuklir Jurusan Fisika UNDIP t have been conducted research about the influence of distance variability betweensecondary radiation source and the determining spot to scatter  radiation exposure in theinspection room I radiology instalation RSUD Kolaka – South East Sulawes, it producted isodosecurve .This research use phantom, in the form of water in the plastic container high 40 cm andwidth 21 cm, with exposure wide 30×  40 cm. Exposure condition is given by fixed expose factor covering of tube voltage 90 kV, tube current 150 mA and exposure time 0.8 second.  Sample in this research is distance of 1 meter; 1,5 meter and 2 meter from the secondary radiation source to thedetermining spot, which measuring the scatter radiation exposure is directly conducted by thesurvey meter measuring instrument.The result of research indicates that the amount of thescattered radiation exposure will downhill progresivley to addition distance, so it can know thepoints/places that safe to the scatter radiation exposure. It can also know the maximum time limitallowed for a radiator worker in the inspection room I. Keywords : Isodose Curve ,  Phantom, Expose factor, Scatter radiation exposure. BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4997 BERKALA FISIKA; Vol 15, No 4 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2997 2012-04-04T07:34:54Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Studi Awal Pemodelan Perlakuan Virotherapy Yang Menggunakan Virus Campak Pada Tumor Paru-Paru Tikus Kartono, Agus Laboratorium Fisika Komputasi Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor, Jalan Meranti, Gedung Wing S, Lantai 2, Kampus IPB Darmaga, Bogor 16680 Sunjono, Sunjono Laboratorium Fisika Komputasi Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor, Jalan Meranti, Gedung Wing S, Lantai 2, Kampus IPB Darmaga, Bogor 16680 Arif, Ardian Laboratorium Fisika Komputasi Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor, Jalan Meranti, Gedung Wing S, Lantai 2, Kampus IPB Darmaga, Bogor 16680 The interaction model dynamics between tumor and viruses based on the interaction phenomenon between the three populations, namely: population of uninfected tumor cells, tumor cell population infected with the virus and the virus population. This study aimed to see the interaction between non-infected tumor cells, tumor cells infected with viruses and viruses, so it can be modeled using virotherapy treatment of measles virus in mouse lung tumors. Model parameters obtained from experimental data. Numerical Solution of the models suggest that the dose of the virus play an important role in determining the outcome of tumor therapy. Tumor growth can be slowed by using this virotherapy, but the tumor can not be killed as a whole. Keywords: model dynamics, virotherapy, measles virus, mouse lung tumors BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2997 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/34496 2020-11-26T09:44:32Z berkala_fisika:ART

nmb a2200000Iu 4500 "201126 2020 eng " 1410-9662 dc PENGUKURAN COMPUTED TOMOGRAPHY DOSE INDEX (CTDI) PADA FANTOM KEPALA DENGAN MENGGUNAKAN CT DOSE PROFILER Ahadiyah, Naeli Ni'matin Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Setiawati, Evi Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Arifin, Zaenal Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Anam, Choirul Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang This study aims to  measure  computed  tomography  dose  index (CTDI) on  a  head  polymethyl methacrylate (PMMA) phantom using a CT dose profiler for various slice thicknesses. The slice thicknesses were 3, 5, and 10 mm. Dose measurements were performed in spiral mode for every hole  within  the  head  PMMA  phantom.  A  CT  dose  profile  analyzer  software  integrated  the profile  dose  along  100  cm  to  find  the  CTDI100.  The  CTDIw  was  calculated  as 1/3×(CTDI100,center)+2/3×(average CTDI100, perifer). Since the pitch was unity, the CTDIvol was similar to the CTDIw. The values of CTDIvol for slice thickness variations were from 45.7 mGy to 46.0 mGy.  This result indicated that there is no significant different of CTDIvol measured using CT dose profiler for slice thicknesses from 3 mm up to 10 mm. Keywords: CT dose profiler, CTDI, CTDI100, CTDIw, CTDIvol, slice thickness  BERKALA FISIKA 2020-11-26 09:44:32 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/34496 BERKALA FISIKA; Vol 23, No 4 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5212 2013-07-30T08:52:16Z berkala_fisika:RA

nmb a2200000Iu 4500 "130401 2013 eng " 1410-9662 dc PEMANFAATAN SIFAT OPTIS AKTIF ALAMI UNTUK KENDALI MUTU MINYAK GORENG MENGGUNAKAN LAMPU PIJAR Asy Syifa, A Y SMA Semesta Semarang Nisa, Fathia SMA Semesta Semarang Prasanti, Irvani D SMA Semesta Semarang Murni, Sri Jurusan Fisika Fakultas Sains dan Matematika Universitas Diponegoro Firdausi, K Sofjan Jurusan Fisika Fakultas Sains dan Matematika Universitas Diponegoro In this study the properties of natural optical activity of the various vegetable cookingoils was used as a new method for a quality control and was proposed as a new prospect forpreliminary test of oil quality. The samples used were various packaging cooking oil obtained inthe shops and were considered already fulfilled by SNI. The source of light to illuminate was a75W light-bulb. The change of the polarization angle of light was measured using polarizer basedon Malus’ law, and it was used to indicate the levels of oil quality degradation. The experimentalresult shows that highest change of polarization angle indicates relative lowest quality of oils. Anolive oil shows the best oils relative from other types of vegetable oils. The natural polarization inthis case is able to differentiate between various types of oil, and to distinguish fresh oil andexpired oil. It seems that natural polarization accommodates some contributed components oflevel of degradation of oil quality, i.e. free fatty acid and saturated fat. This method provides someadvantages, such as, simple equipments, a fast test, without preliminary treatment, and accurateresults. For the future, it shows a reliable test to conduct as a previous quality control for cookingoil and replaces the role of conventional, expensive standard methods. This method offers also achallenge to evaluate the level of authentication or halal of oils and fats.Keywords: oil quality, polarization angle, optical activity. BERKALA FISIKA 2013-07-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5212 BERKALA FISIKA; Vol 16, No 2 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3037 2012-04-06T07:43:07Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Karakterisasi Dinamika Tingkat Tenaga Eksitasi 2Ag- Pada Karotenoid Spheroidene Menggunakan Spektroskopi Ultra Cepat Pisah Waktu Novita, Mega Magister Biologi Universitas Kristen Satya Wacana Jl. Diponegoro 52-60 salatiga, Jawa Tengah Mangimbulude, Jubhar Magister Biologi Fakultas Biologi Universitas Kristen Satya Wacana Jl. Diponegoro 52-60 salatiga, Jawa Tengah S. Rondonuwu, Ferdy Magister Biologi Fakultas Sains dan Matematika Universitas Kristen Satya Wacana Jl. Diponegoro 52-60 salatiga, Jawa Tengah Poliena adalah rantai karbon dengan ikatan rangkap dan tunggal yang saling berutan. PPP-MRD-CI mempredikasikan bahwa rantai-rantai pendek poliena memiliki struktur energi dengan tingkatan 1Ag- > 2Ag- > 1Bu+.  Waktu hidup tingkat tenaga eksitasi 2Ag- dan 1Bu+  pada poliena berada pada orde pikodetik – nanodetik tergantung pada panjang rantainya. Karotenoid sering dimodelkan sebagai rantai poliena dengan struktur energi yang sama. Paper ini membahas dinamika tingkat tenaga 2Ag- karotenoid spheroidene dalam pelarut n-hexane menggunakan spektroskopi ultra cepat pisah waktu. Didapati bahwa waktu hidup tingkat tenaga 2Ag- karotenoid spheroidene sekitar 9 pikodetik, dan sedikit bervariasi tergantung tingkat vibrasinya. Kata kunci: spheroidene, struktur energi, waktu hidup, spektroskopi BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3037 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/44186 2022-01-16T05:50:03Z berkala_fisika:ART

nmb a2200000Iu 4500 "220116 2022 eng " 1410-9662 dc RANCANG BANGUN SISTEM KENDALI HUMIDIFIER JARAK JAUH BERBASIS MIKROKONTROLER DENGAN IoT (INTERNET OF THINGS) Zakiyyah, A.Z. Departemen Fisika, Universitas Diponegoro Semarang Sumariyah, Sumariyah Departemen Fisika, Universitas Diponegoro Semarang Suseno, Jatmiko Endro Departemen Fisika, Universitas Diponegoro Semarang humidifier, DHT22, IoT, ESP8266, Blynk Room conditions that are too dry or too humid are not good for human health, so we need a humidifier that can maintain humidity in the room. There has been no research on humidifiers that apply DHT22 and HC-SR04 sensors and smartphone as device controls. This reasearch is to design of a humidifier that can be controlled from a smartphone with the addition of these two sensors. In this study, the DHT22 sensor was used as a temperature and humidity detector, with a measurement error of 1.5% for temperature and 1.12% for humidity. The HC-SR04 sensor is used to detect the water capacity in the humidifier with a measurement error of 0.48%. The system is made using NodeMCU ESP8266 which can send sensor readings directly to WiFi. The sensor reading results are sent via the internet to the server and then displayed on the Blynk application on the smartphone. In the Blynk application, the desired humidity set point value can be adjusted, and the state of temperature, humidity, and water capacity in the humidifier can be monitored. This Blynk app can display a notification when the water inside humidifier is running low. The system can also display notifications based on set point and detected relative humidity value. If the detected humidity is lower than set point, a notification will appear and humidifier will be automatically turned on. Otherwise if the humidity is higher than set point, a notification will appear and humidifier will be automatically turned off. BERKALA FISIKA 2022-01-16 05:50:03 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/44186 BERKALA FISIKA; Vol 24, No 4 (2021): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/6179 2014-02-10T09:36:57Z berkala_fisika:RA

nmb a2200000Iu 4500 "131001 2013 eng " 1410-9662 dc IDENTIFIKASI TELUR AYAM DARI INDUK MUDA DAN TUA MENGGUNAKAN SPEKTROSKOPI INFRAMERAH DEKAT Amalia, Riana Program Studi Pendidikan Fisika FSM Universitas Kristen Satya Wacana Trihandaru, Suryasatriya Program Studi Pendidikan Fisika FSM Universitas Kristen Satya Wacana Rondonuwu, Ferdy S Program Studi Pendidikan Fisika FSM Universitas Kristen Satya Wacana One important factor in the hatching chicken eggs industry is hatchability of  the eggs. Conventionally, hatchability of the eggs is determined by the age of the hen. It is estimated thateggs which have high hatchability will produced from the hen which is aged between 25 to 55weeks. However, the age of the eggs hen is difficult to recognize from the egg itself, in particular ifthe identification needs to be done quickly and involving eggs in large quantities. This paperreports the identification of chicken egg from young and old hen using Near Infrared Spectroscopy(NIRS), followed by Principal Component Analysis (PCA). A total of 120 eggs with the amount of 60 eggs  that was taken from young hen (aged around 26 weeks) and the remaining 60 eggs thatwas taken from  old hen (aged arround 66 weeks) can be clearly distinguished by clusteringthrough PC1-PC2 diagram. Thus, this method can be used to identify  chicken eggs based on agehen. Keywords : Chicken Eggs, NIRS, PCA. BERKALA FISIKA 2014-02-10 09:02:33 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/6179 BERKALA FISIKA; Vol 16, No 4 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3054 2012-04-06T18:26:32Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Penentuan Tebal Bahan Transparan (ZnO) Menggunakan Interferometer Michelson Edy Nugroho, Sulung Laboratorium Elektronika-Optik dan Laser Jurusan Fisika, FMIPA UNDIP Semarang Firdausi, K. Sofjan Laboratorium Elektronika-Optik dan Laser Jurusan Fisika, FMIPA UNDIP Semarang Marhaendrajaya, Indras Laboratorium Elektronika-Optik dan Laser Jurusan Fisika, FMIPA UNDIP Semarang Thickness’ determination of ZnO material on a substrate (microscope slide) by using Michelson Interferometer has been carried out. The material used in the research was ZnO transparent material deposited on a 1 mm-thickness of a microscope slide.  Refractive index of the microscope slide and the thickness of ZnO were measured by counting the fringes transitions as the materials rotated large as , on the other words, fringes transitions   as function of sinus incident angles  of laser ray, .  Incident angles of laser ray, which are used in the measurement of  ZnO transparent material thickness on microscope slide, are 1°, 2°, 3°, 4°, 5°, 6°, 7°, 8°, 9°, and 10°.  Laser ray used in this research was He-Ne laser, which has 633 nm and its output power was < 1 mW. The results of this research show that there were  fringes transitions as research-materials rotated large as .  The measured fringes transitions still have remarkable agreement with the theoretical fringes transitions.  As the incident angles increases, the fringes transitions  will increase as well as.  The thickness of the ZnO thin film, which is resulted from the research, is equal to (6.0 ± 1.8) × 10-5 m. BERKALA FISIKA 2012-04-06 10:17:20 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3054 BERKALA FISIKA; Vol 10, No 3 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2774 2012-03-29T12:44:39Z berkala_fisika:RA

nmb a2200000Iu 4500 "120328 2012 eng " 1410-9662 dc Studi Analisis Parameter Gempa Bengkulu Berdasarkan Data Single-Station dan Multi-Station serta Pola Sebarannya Hadi, Arif Ismul Jurusan Fisika FMIPA Universitas Bengkulu Suhendra, Suhendra Jurusan Fisika FMIPA Universitas Bengkulu Efriyadi, Efriyadi Jurusan Fisika FMIPA Universitas Bengkulu Abstract The purpose of this research is to analyze of tectonic earthquake parameter value in Bengkulu Province based on single-station data of BMKG Kepahyang, Bengkulu and multi-station data of BMKG Center, Jakarta along with determine its distribution model from January 2005 until March 2009. The results show that distance difference of mean earthquake epicenter is 28.60 km. The distribution of earthquake in Bengkulu Province from January 2005 until March 2009 had majority distributed in Hindia Oceanic and its mean earthquake included shallow earthquake (<70 km).   Keywords: Earthquake parameter, single-station, multi-station, magnitude, and epicenter.   BERKALA FISIKA 2012-03-28 21:23:50 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2774 BERKALA FISIKA; Vol 13, No 4 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/54919 2023-06-01T04:13:32Z berkala_fisika:ART

nmb a2200000Iu 4500 "230601 2023 eng " 1410-9662 dc ANALISIS MODULATION TRANSFER FUNCTION (MTF) DAN CONTRAS-TO-NOISE RATIO (CNR) UNTUK OPTIMASI KUALITAS CITRA CT SCAN Azhara, Mutiara Fatimah Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Dewang, Syamsir Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Astuty, Sri Dewi Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Rosyidah, Ulfah Instalasi Radiologi, RSUD Haji Makassar, Indonesia Samad, Bannu Abdul Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia IndoQT, Resolusi Kontras Tinggi, Resolusi Kontras Rendah Salah satu parameter utama dalam kualitas citra CT scan untuk menegakkan diagnosa adalah   resolusi  kontras  tinggi  (Modulation  Transfer  Function,  MTF)  dan  resolusi  kontras  rendah (Contrast-to-Noise  Ratio,  CNR).  MTF  dan  CNR  menjadi  kriteria  penting  untuk membandingkan protokol dosis tinggi dan dosis rendah, yang bergantung pada karakteristik obyek  yang  menjadi  target.  MTF  menghitung  jumlah  keburaman  (noise)  dan  kontras  pada frekuensi  spasial  sedangkan  CNR  menampilkan  objek  dalam  ukuran  2-3  mm  yang  memiliki perbedaan densitas. Penelitian ini menggunakan fantom AAPM sebagai obyek dengan variasi arus tabung dan tebal irisan. Citra dianalisis dengan software Radiant DICOM dan IndoQCT. Pengukuran  dilakukan  dengan  dua  variasi  yaitu  arus  tabung  100,  130  dan  150  mA  pada tegangan  tabung  80  kV  dan  tebal  irisan  2,5  mm,  sedangkan  untuk  variasi  tebal  irisan  1,25; 3.75;  dan  5  mm  pada  tegangan  tabung  80  kV  dan  arus  tabung  125  mA.  Hasil  penelitian diperoleh  nilai  MTF  masing-masing  variasi  arus  tabung  berturut-turut  0,7  line/mm;  0,7 line/mm;  dan  0,8  line/mm.  Nilai  MTF  masing-masing  variasi  tebal  irisan  sama  yaitu  0,7 line/mm.  Nilai  CNR  terhadap  variasi  arus  tabung  sebesar  2,548;  3,016;  dan  3,482  serta terhadap  variasi  tebal  irisan  diperoleh  2,308;  2,613;  dan  2,735.  Semakin  besar  nilai  arus tabung dan tebal irisan, maka nilai MTF semakin tinggi demikian pula untuk nilai CNR. BERKALA FISIKA 2023-06-01 04:13:31 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/54919 BERKALA FISIKA; Vol 26, No 1 (2023): Berkala Fisika eng Copyright (c) 2023 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/7386 2014-09-24T09:08:47Z berkala_fisika:RA

nmb a2200000Iu 4500 "140401 2014 eng " 1410-9662 dc KAJIAN LAHAN GAMBUT SEBAGAI CALON LOKASI/TAPAK PLTN Khusyairi, Akhmad Pusat Pengkajian System dan Teknologi Pengawasan Instalasi dan Bahan Nuklir Badan Pengawas Tenaga Nuklir (BAPETEN) Jl. Gajah Mada no. 8 Jakarta The utilization of nuclear technology for energy will increase significantly which will supply electricity demand in the future. Geologically, Indonesia has varied condition which imply to design, operation and emergency plan. Peat lands have specific physical and chemical natures, therefore the owner should pay attention for this site to be assessed. The general potential hazard is peat lands fire during summer season which is effected by deforestation and low level of water surface, which will influence to the plants structure integrity. The assessment method which was used is literature study. Keywords: Peat lands, NPP, nuclear, electricity BERKALA FISIKA 2014-09-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/7386 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 2 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3070 2012-04-07T08:50:30Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Review Probabilitas Menemukan Elektron dengan Fungsi Gelombang Simetri dan Antisimetri pada Molekul Yusron, Moh. Laboratorium Fisika Atom & Nuklir, Jurusan Fisika, UNDIP Firdausi, K. Sofjan Laboratorium Fisika Atom & Nuklir, Jurusan Fisika, UNDIP Sumariyah, Sumariyah Laboratorium Komputasi Fisika, Jurusan Fisika, UNDIP The probability density of  and  for the symmetry and asymmetry wave function respectively, for  ion has been simulated. The  and  wave function have been obtained through the solutions of one dimensional time-independent Schrödinger equation.  The  and  are formed then by linear combination of individual solution of wave function of hydrogen atom. The probability density is calculated and simulated for several values of inter nuclear distance in Bohr radius, using Matlab 6.5. The interpretation of  shows that the probability in finding the electron in the space between inter nuclear distance of 0,2 is very small for asymmetry and very large for symmetry wave function. If the inter nuclear distance is made larger in several , the probability becomes smaller. The probability density is just equal to individual in finding electron in a hydrogen atom. Key words: The probability density, symmetry and asymmetry wave function, the  ion. BERKALA FISIKA 2012-04-06 10:17:48 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3070 BERKALA FISIKA; Vol 10, No 1 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2797 2012-03-29T14:38:02Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Analisis Distribusi Suhu Aksial Teras Dan Penentuan keff PLTN Pebble Bed Modular Reactor (PMBR) 10 MWE Menggunakan Metode MCNP 5 Setiyo, Agung Laboratorium Fisika Medik FMIPA UNDIP Munir, Mohamad Laboratorium Fisika Medik FMIPA UNDIP The axial temperature distribution and effective multiplication factor (Keff) for PBMR 10 MWe which used uranium dioxside (UO2) as fuel, graphite as moderator, and helium (He) gas as cooler with heterogenous reactor design which used geometry of reactor core finite cylinder has been investigated. The axial temperature distribution of reactor core analysized by splitting core reactor become 57 layers axially and every layer has height 14,9 cm. Keff of reactor  calculated by MCNP 5 with fuel enrichment variation from 7 to 10% and variation range 0,5%. The result shows that reactor in critical condition with fuel enrichment 8,6% and average temperature of reactor core is 893,635 K.   Keywords: PBMR, MCNP, Temperature distribution, Keff BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2797 BERKALA FISIKA; Vol 13, No 3 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/70086 2025-01-08T12:54:51Z berkala_fisika:ART

nmb a2200000Iu 4500 "240717 2024 eng " 1410-9662 dc PERKEMBANGAN NANOSAINS DAN NANOTEKNOLOGI: FENOMENA DARI SIFAT FISIKA DAN KIMIA Paramita, Safira Arta Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275 Priyono, Priyono Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275 nanoscience; nanotechnology; nanomaterials; nanoparticle; physicochemical Nanoscience breakthroughs in almost every field of science and nanotechnologies make life easier in this era. Interest in nanomaterials and especially nanoparticles has exploded in the past decades primarily due to their novel or enhanced physicochemical properties compared to bulk material. Nanoscience and nanotechnology represent an expanding research area, which involves structures, devices, and systems with novel properties and functions due to the arrangement of their atoms on the 1–100 nm scale. These extraordinary properties have created a multitude of innovative applications in the fields of medicine and pharma, electronics, agriculture, chemical catalysis, food industry, and many others. We try to provide a comprehensive overview of the different classes of nanoparticles and their novel or enhanced physicochemical properties including mechanical, thermal, magnetic, electronic, optical, and catalytic properties. We hope that this makes the many different methods more accessible to the readers, and to help with identifying the proper methodology for any given nanoscience problem. BERKALA FISIKA 2025-01-08 09:35:44 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/70086 BERKALA FISIKA; Vol 27, No 2 (2024): Berkala Fisika eng Copyright (c) 2025 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/9382 2015-11-06T07:32:21Z berkala_fisika:RA

nmb a2200000Iu 4500 "150102 2015 eng " 1410-9662 dc FABRIKASI DAN KARAKTERISASI ELEKTRODA KARBON UNTUK SISTEM DESALINASI LARUTAN KCl DENGAN METODE FREEZING THAWING Sari, Intan Permata Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Institut Teknologi Sepuluh Nopember Surabaya 60111 Endarko, Endarko Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Institut Teknologi Sepuluh Nopember Surabaya 60111 PVA, activated carbon, capacitive deionization, cyclic voltammetry, desalination Carbon electrode using an active carbon and poly(vinylalcohol) PVA binder  (a   water-soluble  polymer)  by   freezing thawing have successfully been synthesized and characterized. In this research, synthesis of carbon electrode was used freezing thawing method with 4 cycles.  For each one cycle is required 12 hours for freezing and 12 hours for thawing. Specific capacitance of carbon electrode has been observed and measured using cyclic voltammetry and resulted in a value of 9.1 F/g. Meanwhile, SEM image of the cross-section of electrode showed that the electrode has enough pores so that can be used as electrode in a capacitive deionization system. . Desalination experiments were carried out in single-pass mode. KCl solution with an initial conductivity of 180μs/cm is pumped to CDI cell with flow rate of 25 mL/min at voltage source of 2 V. The result showed that the percentage value of the salt-removal was achieved at 64.95%. Keywords: PVA, activated carbon, capacitive deionization, cyclic voltammetry, desalination BERKALA FISIKA 2015-11-05 00:00:00 application/pdf application/pdf application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/9382 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 1 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3087 2012-04-07T10:31:45Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Penentuan Kedalaman dan Ketebalan Akuifer Menggunakan Metode Seismik Bias (Studi Kasus Endapan Alluvial Daerah Sioux Park, Rapid Creek, South Dakota, United State of America) Listiyani, Fenti Laboratorium Geofisika Jurusan Fisika Universitas Diponegoro Nurwidyanto, M. Irham Laboratorium Geofisika Jurusan Fisika Universitas Diponegoro Yulianto, Gatot Laboratorium Geofisika Jurusan Fisika Universitas Diponegoro Data processing of refraction Seismic has been done by using the secondary data in area of Sioux Park, Rapid Creek, South Dakota, United State of America with the trajectory of seismic SP#1 which  has geology structure of alluvial sediment. The sediment Alluvial has a form of water carrier rock precipitated by Rapid Creek Tthe data processing of refraction Seismic usedin this experiment is  Reciprocal Hawkins methode that  represent a method that develop concept of time depth recognition. The time Depth from the refractor is  equal for the travel of critical time from the aspect of between refractor and surface less than time required for the ray path of projection of area refractor at a speed of refractor. Results   of  the seismic refracted obtained: first layer consist of clay  functioning as covering laye, the second layer lapped over from clay, sand, and gravel functioning as carrier coat irrigate or coat acquife and the   third layer lapped over from stone napal, functioning as waterproof coat ( impermeable). Deepness of layer acquifer vary from 0.93 ft - 12.01 ft ( 0.28 m – 3.66 m), and their thickness vary from 0.86 ft – 14.43 ft ( 0.26 m – 4.40 m). The geometry of these  acquiferare in the form of free acquifer  or unconfined aquifer. Keywords: seismic refraction, ground water BERKALA FISIKA 2012-04-06 10:20:34 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3087 BERKALA FISIKA; Vol 9, No 3 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2870 2012-03-29T14:25:06Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc PENENTUAN STRUKTUR KRISTAL AlMg2 ALLOY DENGAN DIFRAKSI NEUTRON Ismul Hadi, Arif Jurusan Fisika FMIPA Universitas Bengkulu Sumariyah, Sumariyah Jurusan Fisika FMIPA Universitas Diponegoro Dahlan, M. Pusat Elemen Bahan Nuklir BATAN Serpong, Jakarta Mohtar, Mohtar Pusat Elemen Bahan Nuklir BATAN Serpong, Jakarta The determination of crystallography structure of AlMg2 alloy has been done by neutron diffraction. In fabrication process, it was addressed by rolling phases. The first by hot rolling with thickness follows: 8.35 mm; 7.00 mm; 5.6 mm; 2.60 mm; 1.65 mm ± 0.05 at  425 0C temperature extended by cold rolling: 1.65 mm to 1.30 mm ± 0,07 thickness at normal temperature. Counting of the data was started by activate of detector from 110 to 400 angle with 0.075 overstep and preset monitor count of 60,000 at 26 MW. Processing of the data using of microcomputer 16 bit NEC PC-9801 VM2. The results show that the AlMg2 alloy structure are FCC system with lattice parameter (a) = 4.0817 A0.   Keywords: AlMg2 alloy, neutron diffraction, and FCC BERKALA FISIKA 2012-03-29 11:12:16 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2870 BERKALA FISIKA; Vol 14, No 2 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/12805 2016-12-16T09:52:53Z berkala_fisika:RA

nmb a2200000Iu 4500 "151001 2015 eng " 1410-9662 dc PENINGKATAN SIFAT MAGNETIK MATERIAL HEMATIT MELALUI SUBTITUSI BARIUM DAN KONTROL TEMPERATUR SINTERING Widanarto, Wahyu Jurusan Fisika, FMIPA – Universitas Jenderal Soedirman Fauzi, Fuzi Nurrahman Jurusan Fisika, FMIPA – Universitas Jenderal Soedirman Cahyanto, Wahyu Tri Jurusan Fisika, FMIPA – Universitas Jenderal Soedirman Effendi, Mukhtar Jurusan Fisika, FMIPA – Universitas Jenderal Soedirman Iron sand, barium ferrite, structure, magnetic properties Ferrite magnet or ceramic magnet is a competitive product in the magnet market due to low price, corrosion resistant and chemically stable. Barium hexa-ferrite magnet is one of ferrite magnet which is mostly used as magnetic storage and electronic devices based on nanotechnology. Barium hexa- ferrites are synthetized through solid state reaction method at sintering temperatures of 1100 °C with the composition (100-x)Fe2O3 : xBaCO3 , where x = 0 and 20 in mol % . Results of XRD characterization show that the diffraction peaks of XRD spectrum is dominated by the peaks of barium ferrite crystal with a hexagonal crystal system. Magnetic properties of Fe2O3 material doped with barium carbonate of 20 mol % and sintered at 1100 °C increase significantly compared to the others. This simple and inexpensive method is very promising for the manufacture of barium hexa-ferrite materials with natural ferrite as the main material. Keywords: Iron sand, barium ferrite, structure, magnetic properties BERKALA FISIKA 2016-12-16 09:09:59 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/12805 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 4 Tahun 2015 eng Copyright (c) 2016 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/3103 2012-04-07T12:41:14Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Penentuan Dosis Gamma Pada Fasilitas Iradiasi Reaktor Kartini Setelah Shut Down Prasetyowati, Risprapti Jurusan Fisika FMIPA UNDIP Azam, Much. Jurusan Fisika FMIPA UNDIP Firdausi, K. Sofjan Jurusan Fisika FMIPA UNDIP B. S., Edi Trijono P3TM BATAN Determination of gamma dose after reactor shut-down around the kartini reactor core have beeb done. The measurement was done at the Lazy Susan (Rotary Rack) and outside the reflector wall which could be used as irradiation facility. Determination of gamma dose was carried out using wide range dosimeter consisting of a Geiger muller detector end a surveymeter. Detector was directed to outside wall reflector and lazy susan through the dry irradiation facility. Measurement was done after shut down for 3 hours with power of 100 kW and interval of ± 5 minutes. The resulting dose rate in reflector wall without neutron source was 1,2 to 0,2 kR/hour and cumulative dose in a 205  minute period was 2,21 kRad. In reflector wall with neutron source was 6  to 0,2 kR/hour and cumulative dose in a 202  minute period was 2,25 kRad.  While in lazy Susan dose rate of 60 to 2 kR/hour and cumulative dose was 42,70 kRad in 203 minutes decay. Gamma decay constant in reflector wall without  neutron source was 0,008 per minute, with neutron source 0,013 per minute. While in lazy Susan gamma decay constant was 0,014 per minute. Keywords : dose, gamm, core and  reflector, reactor BERKALA FISIKA 2012-04-06 10:20:14 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3103 BERKALA FISIKA; Vol 9, No 1 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2924 2012-03-30T14:33:07Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Interpretasi Bawah Permukaan Daerah Manifestasi Panas Bumi Parang Tritis Kabupaten Bantul DIY Dengan Metode Magnetik Indratmoko, Putut Jurusan Fisika FMIPA UNDIP Semarang Nurwidyanto, M. Irham Jurusan Fisika FMIPA UNDIP Semarang Yulianto, Tony Jurusan Fisika FMIPA UNDIP Semarang Abstract                 Acquisition of geomagnetic field has been done at Kretek, Sanden, Pundong, Bantul and Panggang, Gunung Kidul, Yogjakarta Province on 14 s/d 17 October and  7,8,9,12 November 2009 in orde to interpreted the subsurface structure. Data has been collected by Proton Precession Magnetometer (PPM) to measured  the total  intensity of magnetic field, Global Positioning System (GPS) to determine the position and geology compass to the direction of north pole.                 The raw data has been processed and performed using IGRF (International Geomagnetics Reference Field) correction to obtain total field magnetic anomaly. Upward continuation was performed at 300 meters heigh by Magpick. Qualitative interpretation was done by analyzing regional and local anomaly maps. Quantitative interpretation was done 2 ½ D modelling cross-sectionanomaly maps using Mag2DC for Windows Software.     The result of 2-D modeling produces anomaly objects was susceptibility value (0,0405) in cgs unit  for the first object, susceptibility value (0,0425) in cgs unit  for the second object, susceptibility value (-0,0085) in cgs unit for the third object. The anomaly objects had depth in +580 meters from the surface and was considered the rock which had been experience demagnetitation proses.    Key word: magnetic anomaly, Parangtritis, susceptibilities. BERKALA FISIKA 2012-03-29 14:54:02 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2924 BERKALA FISIKA; Vol 12, No 4 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/23877 2019-06-25T14:23:18Z berkala_fisika:RA

nmb a2200000Iu 4500 "190624 2019 eng " 1410-9662 dc SISTEM PENDINGIN MENGGUNAKAN THERMO-ELECTRIC COOLER DENGAN KONTROLER PROPORTIONAL-INTEGRALDERIVATIVE Indrawan, Wisnu Laboratorium Instrumentasi dan Elektronika, Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Suryono, Suryono Laboratorium Instrumentasi dan Elektronika, Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Cooling, thermoelectric, gas, controller, temperature The cooling is one of the processes can be used for various types of applications, starting from maintaining food industry products and medical products such as drugs and vaccines. The cooling process now still uses compression-based preservation technology using cooling gas. The types of cooling gas used are R134a and R600a, however the R134a contains HFCs which has been banned for used and the R600a contains HF gas which can reduce the ozone layer. The current study designed hardware and software that is applied to thermoelectric coolers (TEC), i.e. it was designed a device used for the air conditioning system using a thermoelectric cooler with a Proportional Integral Derivative (PID) controller. This system used several tools such as temperature sensors, transistor with TIP31 type, bluetooth module, fan, and ATSAM3X8E microcontroller. In this study, temperature control was carried out based on the desired set-point temperature and temperature of the sensor. From this study, it can be found that the greater value of the voltage given, the greater the value of the Pulse Wave Modulation (PWM) will be produced. The higher value of PWM, the faster the temperature decreases in the cooler. From several tests, it can be concluded that the values of proportional control parameter (Kp) of 2.55, integral control parameter (Ki) of 100 and deferential control parameter (Kd) of 200, more stable graph is obtained and close to the set-point value, with an error value of 2.86%. Keywords : Cooling, thermoelectric, gas, controller, temperature BERKALA FISIKA 2019-06-24 11:44:36 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/23877 BERKALA FISIKA; Vol 22, No 2 (2019): Berkala Fisika Vol. 22 No. 2 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4981 2013-05-27T14:18:11Z berkala_fisika:RA

nmb a2200000Iu 4500 "120401 2012 eng " 1410-9662 dc Sintesis Nanopartikel Cerium Oxide Menggunakan Metode Presipitasi dan Sifat Optiknya Nurhasanah, Iis Laboratorium Fisika Material, Jurusan Fisika, Universitas Diponegoro, Semarang Sutanto, Heri Laboratorium Fisika Material, Jurusan Fisika, Universitas Diponegoro, Semarang Muhlisin, Zaenul Laboratorium Fisika Material, Jurusan Fisika, Universitas Diponegoro, Semarang Nurdianik, Sulistia Laboratorium Fisika Material, Jurusan Fisika, Universitas Diponegoro, Semarang Nursanti, Ida Laboratorium Fisika Material, Jurusan Fisika, Universitas Diponegoro, Semarang Cerium oxide nanoparticles have been synthesized using precipitation method in mixed-solvent system of aquades DM and isopropanol with volume rasio of 1:6.  Presipitation wascarried out by dropping amonium hidroxide to cerium nitrate hexahydrate solution until pH of 9. Precipitated was dried at temperature of 60oC for 2 hours and then calcined  for 2 hours attemperatur of 200oC, 300o and 400oC. Optical properties of cerium oxide nanoparticles werecharacterized using UV-Vis spectrophotometer. Cerium oxide nanoparticles exhibit goodtransparency in visible region and strong UV absorbance. These reults suggesting that ceriumoxide nanoparticles are potential as bionanomaterial for application in UV-blocker. Keywords: cerium oxide, nanoparticles, precipitation, UV filter, band gap energy, UV-Visspectrophotometer BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4981 BERKALA FISIKA; Vol 15, No 2 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2971 2012-04-03T11:50:43Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pengaruh Teknik Tegangan Tinggi Terhadap Entrasce Skin Exposure( ESE ) dan Laju Paparan Radiasi Hambur Pada Pemeriksaan Abdomen Dhahryan, Dhahryan RSUP Karyadi Setia Budi, Wahyu Laboratorium Fisika Atom dan Nuklir Jurusan Fisika UNDIP Azam, Much Laboratorium Fisika Atom dan Nuklir Jurusan Fisika UNDIP The measurement for influence of high voltage technique to Entrance Skin Exposure and is Rate of Scattered Radiation Exposure on abdomen inspection has been conducted. The ESE measurement is conducted using Electrometer and is calculated by semi empirical method, while in measurement of rate of scattered radiation exposure using survey meter at a distance of 100 cm from the object by varying data intake points and its direction of detector. The result indicates that the usage of high voltage technique yields absorbent dose of 124 mrad and radiation exposure of 339 mR. It is lower than the standard value of absorbent dose of 322.7 mrad and radiation  exposure of 130,5 mR. The result of measurement is higher than calculation. In measurement of exposure of scattered radiation rate with detector position faced to object, on right side of cathode, it yields 1.03mR/hour with standard voltage and 0.32 mR/hour with high voltage technique. While in measuring  exposure of scattered radiation rate and back-scattered obtained result on A’ and C’ (close to anoda and side of object) and A” and C” nearly same, with highest value of 1 mR/hour and 0.93 mR/hour at standard tube voltage and at high kV technique obtained lower value of 0.29mR/hour and 0.25mR/hour. BERKALA FISIKA 2012-03-30 15:00:48 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2971 BERKALA FISIKA; Vol 11, No 3 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/4992 2013-05-27T14:47:11Z berkala_fisika:EDT

nmb a2200000Iu 4500 "120701 2012 eng " 1410-9662 dc Berkala Fisika Berkala Fisika, Tim Redaksi Jurusan Fisika Fakultas Sains dan Matematika Universitas Diponegoro Semarang Berkal Fisika Vol 15 No 3 (2012) BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4992 BERKALA FISIKA; Vol 15, No 3 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2992 2012-04-03T15:26:30Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Studi Efek Kerr Untuk Pengujian Tingkat Kemurnian Aquades, Air PAM dan Air Sumur Sukarsono, Kristantyo Laboratorium Optoelektronik dan Laser, Jurusan Fisika FMIPA UNDIP Marhaendrajaya, Indras Laboratorium Optoelektronik dan Laser, Jurusan Fisika FMIPA UNDIP Firduasi, K. Sofjan Laboratorium Optoelektronik dan Laser, Jurusan Fisika FMIPA UNDIP In this research was discussed about the ratio of purity level of aquades, running water, and well water by using the Kerr effect. Several substances being used are sugar solutions with the concentration of 10%, 20%, 30%, 40% and 50% for linearity testing, salt solutions with the concentration of 10%, 30% and 50% for the testing of ionic response which be infested by some dipoles of H2O molecules in the salt solution toward the external electrical field, and also aquades, running water and well water as the water samples having the different purity. The external electrical field being given in the substances from zero to 9×105 V/m and awakened by conducting the direct current of electric on the parallel plates. A light beam being used is a diode laser with λ = 645 nm. The result of research was showing that the presence of external electrical field causing the difference of polarization angle indicating the purity level of water kinds since influenced by ions in the water. Based on the ions containing in it have been known that the value of aquades purity is 4 ppm, the value of running water purity is 108 ppm and the value of well water purity is 190 ppm. So, aquades is purer than running water and running water is purer than well water. The average value of polarization angle of aquades, running water, and well water is approximately 0,50º, 0.25º and -0,25º respectively. Key words: Kerr Effect, electrical field, polarization angle BERKALA FISIKA 2012-04-03 11:53:14 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2992 BERKALA FISIKA; Vol 11, No 1 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/34358 2020-11-22T18:12:16Z berkala_fisika:ART

nmb a2200000Iu 4500 "200731 2020 eng " 1410-9662 dc PENGARUH FAKTOR EKSPOSI DAN TEBAL FANTOM TERHADAP MEAN GLANDULAR DOSE (MGD) PADA PESAWAT SINAR-X MAMMOGRAFI Rauf, Resmy Aulyah Program Sarjana, Departemen Fisika, Fakultas MIPA, Universitas Hasanuddin, Makassar Astuty, Sri Dewi Laboratorium Optik dan Spektroskopi, Departemen Fisika, Fakultas MIPA, Universitas Hanasuddin, Makasar Dewang, Syamsir Laboratorium Optik dan Spektroskopi, Departemen Fisika, Fakultas MIPA, Universitas Hanasuddin, Makasar Mulyadin, Mulyadin Laboratorium Pengujian dan Kalibrasi, Balai Pengamanan Fasilitas Kesehatan, Makassar, Sulawesi Selatan One of the applications of X rays in diagnostic radiology is mammography. The mammography is  used  for  detecting  abnormalities  in  the  breast  tissue  early  with  the  ability  to  detect microcalcification  (<5  mm).  Unlike  the  conventional  X-ray  and  CT  scanner,  the  clinical mammography  uses  a  low  voltage  <35  kVp,  because  the  properties  of  the  breast  tissue structures are soft and thin. Although the tube voltage source is relatively low, in clinical use, the absorbed dose by patients in the form of mean glandular dose (MGD) must  be lower than the  value  standards  had  been  established  by  the  Nuclear  Energy  Supervisory  Agency (BAPETEN) No.2, 2018, i.e <3 mGy. This study aims to evaluate the effect of variations in the values of the tube voltage, the current-time, and the thickness of the polymethyl-methacrylate (PMMA) phantom on the calculation results of the MGD values. The results obtained showed that  the  mean  MGD  values  for  the  4,5  cm  of  the  phantom  thickness  were  0.077, 0.087,  and 0.093  mGy  (at  4.5  mAs)  and  0.171,  0.194,  and  0.207  mGy  (at  10  mAs),  while  for  the  6  cm phantom thickness obtained 0.103, 0.117, and 0.124 mGy (at 4.5 mAs) and 0.228, 0.259, and 0.276 (at 10 mAs) for all the data to 27, 28, and 29 kVp of tube voltage, respectively. All of the MGD values obtained about between 0.077-0.276 mGy are <3 mGy or still under BAPETEN standards. Keywords: mammography, MGD value, PMMA phantom  BERKALA FISIKA 2020-11-22 17:41:26 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/34358 BERKALA FISIKA; Vol 23, No 3 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5008 2013-05-27T16:22:30Z berkala_fisika:RA

nmb a2200000Iu 4500 "110701 2011 eng " 1410-9662 dc INVERSI IMPEDANSI ELASTIK UNTUK MENGESTIMASI KANDUNGAN RESERVOIR BATUPASIR LAPANGAN “Ve” FORMASI CIBULAKAN CEKUNGAN JAWA BARAT UTARA Aisyah, Veratania Jurusan Fisika, Fakultas Sains dan Matematika Universitas Diponegoro Harmoko, Udi Jurusan Fisika, Fakultas Sains dan Matematika Universitas Diponegoro Mualimin, Mualimin Divisi Renbang Lapangan, PT. Pertamina EP Region Jawa An Elastic Impedance inversion was carried out  to determine sandstone reservoir characterization of “Ve” Field Cibulakan Formation, Northwest Java Basin. There are many steps of data processing to analize a well log data in order to get sensitive angle of lithologic characterization. Mudrock Line equation was applied to obtain Vs log data of the research target zone. The next step, we did Well seismic tie toobtain horizon that approach the real geological zone. Initial model was made by used a control well andDST 5 horizon. Sparse Spike inversion gives the most accurate result than two other one. According to thevolume inversion, we plotted to a map show the contrast of sandstone lithology. Based on Elastic Impedanceinversion analysis, we estimate the rangeof sandstone reservoir impedance:1348 (m/s)gr/cc – 1365(m/s)2gr/cc. Crossplot analysis result between log Elastic Impedance and log Gamma Ray shows that 35isthe best angle of the sandstone and shale lithologic sparation. Keyword: Elastic Impedance, AVO, inversion, Mudrock Lin BERKALA FISIKA 2013-05-27 13:55:05 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5008 BERKALA FISIKA; Vol 14, No 3 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3031 2012-04-05T15:02:53Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Analisis Korelasi Kondisi Pembuatan Film Tipis Polipropilen (PP) dan Sifat-Sifat Mekaniknya Dengan Metode Uji Tarik Sari, Kartika Program Studi Fisika Jurusan MIPA FST Universitas Jenderal Soedirman Satoto, Rahmat LIPI Bandung Condition Correlation Analysis of Thin Film Polypropylene (PP) and Attributes Mechanical Tensile Testing Method has been performed in Polymer Test Lab located at LIPI Bandung. This study aims to examine the relationship between the manufacture of thin film with a three-siftat sisitem cooling and mechanical properties. Sample material used is Polypropylene (PP) Y101XX grain pellets. Then the material is arranged on the aluminum frame of the heating plate and plastic transparencies of six samples. Such materials will be heated with two variations of temperature at the same time given the pressure by using the hot press Gonno-02 326 at 175oC and 225oC and given three different treatment when the cooling process that is in the chill with ice water (quenching), in the chill on cold press and cooled until it reaches room temperature by turning off the heater. Samples that have formed a thin film forming dipotopng Dumbbell type ISO 527-2. Of the six films produced by two samples with different cooling systems made seven Dumbbell. Then Dumbbell-dumbbell was conducted testing of mechanical properties by measuring the strain, stress and elastic modulus using a tensile test using a Universal Tensile Tester.   Keywords: Polypropylene (PP), Thin Film, Universal Tensile Tester   BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3031 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/44179 2022-01-16T05:28:56Z berkala_fisika:ART

nmb a2200000Iu 4500 "220116 2022 eng " 1410-9662 dc SISTEM PENDINGIN RUANG MENGGUNAKAN TABUNG SPINNING DENGAN PRINSIP PENYERAPAN PANAS DILENGKAPI KENDALI JARAK JAUH MENGGUNAKAN GELOMBANG RADIO FREKUENSI (RF) Gunadi, Isnain Departemen Fisika, Universitas Diponegoro Semarang Putra, Satrio Sandi Departemen Fisika, Universitas Diponegoro Semarang Suseno, Jatmiko Endro Departemen Fisika, Universitas Diponegoro Semarang Mikrokontroller ATmega8535, CodeVision AVR, remote 4 channel. ABSTRAK Pada  penelitian  ini  dilakukan  rancang  bangun  sebuah  sistem  Air  Conditioning  (AC)  sederhana dengan Mikrokontroller Atmega8535  untuk  aplikasi  sistem penyejuk ruangan secara otomatis. Secara  umum,  sistem  penyejuk  ruangan  sederhana  ini  dilakukan  berdasarkan  pencampuran garam  ke  dalam  air,  sehingga  reaksi  antara  garam  dan  air  menimbulkan  penurunan  suhu. Dengan  demikian,  air  bercampur  dengan  garam  dan  garam  memiliki  titik  beku  yang  lebih rendah dari titik beku murni sehingga dapat menjadi es di sekitar tabung. Sistem ini terdiri dari 3  (tiga)  bagian  berdasarkan  fungsi  dan  tujuannya  masing-masing,  yaitu  input,  pengendali,  dan output.  Sistem  ini  menggunakan  remote  4  channel  dan  receiver  sebagai  penerima  sinyal  dari remote  sebagai  input  untuk  menghidupkan  kipas  dan  dinamo  pada  motor  tabung.  Saat  ditekan tombol  ON  pada  remote  maka  sinyal  yang  dikirimkan  dari    remote  akan  diterima  receiver  lalu receiver  akan  mengolah  sinyal  remote  yang  kemudian  dikirimkan  ke  mikrokontroller  untuk menghidupkan  sistem  alat  dan  dinamo  tabung.  Setelah  itu  untuk  menghidupkan  kipas  atur  set point    menggunakan  tombol  UP  atau  DOWN  pada  remote.  Receiver  juga  mampu  menerima sinyal remote pada jarak 1-8 meter. Output dari sistem ini berupa hawa dingin yang dihasilkan dari  pencampuran  garam  dan  air  kemudian  ditiup  keluar  oleh  kipas  lalu  dibaca  sensor.  Sistem kendali  yang  digunakan  adalah  Mikrokontroler  Atmega8535  yang  kemudian  diprogram menggunakan  CodeVision  AVR.  Berdasarkan  hasil  uji  penelitian,  sistem  dapat  bekerja  sesuai dengan  deskripsi  kerja  yang  ditetapkan  dan  alat  dapat  digunakan  untuk  menyejukkan  ruangan dengan suhu 30°C-23°C.   Mikrokontroller ATmega8535, CodeVision AVR, remote 4 channel. BERKALA FISIKA 2022-01-16 05:28:56 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/44179 BERKALA FISIKA; Vol 24, No 3 (2021): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5263 2013-08-01T09:45:41Z berkala_fisika:RA

nmb a2200000Iu 4500 "130701 2013 eng " 1410-9662 dc OPTICAL AND MAGNETIC PROPERTIES OF TeO2⋅ZnO⋅Li2O GLASS SYSTEM CONTAINING NATURAL Fe3O4 PARTICLES Widanarto, W Physics Study Program, Universitas Jenderal Soedirman, Jl. dr. Soeparno 61 Purwokerto 53123, Indonesia Sahar, M. R. Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, Johor Bahru, Skudai 81310, Malaysia Shoshal, S. K. Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, Johor Bahru, Skudai 81310, Malaysia Arifin, R. Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, Johor Bahru, Skudai 81310, Malaysia Rohani, M. S. Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, Johor Bahru, Skudai 81310, Malaysia Natural Fe3O4 particles obtained by extracting and manual pulverizing natural iron sand, are doped in the TeO⋅ZnO⋅Li2O glass system by melt quenching technique at 800 °C. X-ray diffraction spectra confirms the presence of iron sand particles with the 33-146 nm diameters and the glassy structure. Vibrating sample magnetometer reveals the pulverized sand exhibits paramagnetic behaviour with magnetic susceptibility of 2.76 × 10^-4 m^3 kg^-1. Incorporation of  the particles in the glasses changes color, thermal stability and improve the glass formation ability through value of Tc-Tg. Ultraviolet–visible measurements show the optical energy band gap decreases by 1.58 eV. Meanwhile, the resonance amplitude of the electron spin resonance spectrum decreases due to the presence of Fe3O4 particles in reducing the unpaired electron spin. The synthesized glasses exhibit paramagneticbehavior. Keywords: Iron Sand, Ferrite oxide, Tellurite, Glass, Optical band gap, Magnetic property, ESR −Tcg BERKALA FISIKA 2013-08-01 09:11:11 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5263 BERKALA FISIKA; Vol 16, No 3 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3049 2012-04-06T20:08:09Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pengukuran Nilai  dan  Larutan Gliserin Terimbas pada Frekuensi PLN Firdausi, K. Sofjan Laboratorium Optoelektronik & Laser, Jurusan Fisika FMIPA UNDIP Lego, Dro Dwi Laboratorium Optoelektronik & Laser, Jurusan Fisika FMIPA UNDIP Sugito, Heri Laboratorium Optoelektronik & Laser, Jurusan Fisika FMIPA UNDIP The magnetooptical specific rotary power h and frequence specific rotary power z have been measured in the glycerine through the interaction between external magnetic field modulated at 50-60 Hz and modulated laser light at the wavelength of 632,8 nm and 532 nm. The sample induced by the magnetic field that has the maximum value of 170 mT. The source of light of 632,8 nm and 532 nm is modulated between 30 Hz and 100 Hz. The result of experiment indicates that values of h and z at l = 632,8 nm are more dominant than at l = 532 nm.    Key words: magnetooptic, specific rotary power, resonance frequency BERKALA FISIKA 2012-04-06 10:17:07 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3049 BERKALA FISIKA; Vol 10, No 4 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2039 2012-03-29T12:55:11Z berkala_fisika:RA

nmb a2200000Iu 4500 "120221 2012 eng " 1410-9662 dc Optimasi Tungku Sekam Skala Industri Kecil Dengan Sistem Boiler Nawafi, F Departemen Fiska, FMIPA, Institut Peranian Bogor, Jl. Meranti gedung FMIPA, Kampus Dramaga, Bogor 16680, Tel./ Fax : +62-251-625728 Puspita, D Departemen Fiska, FMIPA, Institut Peranian Bogor, Jl. Meranti gedung FMIPA, Kampus Dramaga, Bogor 16680, Tel./ Fax : +62-251-625728 Desna, Desna Departemen Fiska, FMIPA, Institut Peranian Bogor, Jl. Meranti gedung FMIPA, Kampus Dramaga, Bogor 16680, Tel./ Fax : +62-251-625728 Irzaman, Irzaman Departemen Fiska, FMIPA, Institut Peranian Bogor, Jl. Meranti gedung FMIPA, Kampus Dramaga, Bogor 16680, Tel./ Fax : +62-251-625728 Rice husk furnace  is a technology based on local wisdom to anticipate threats crisis energy. At first investigated husk stoves for cooking only in the scale of the household, but today rice husk furnace developed for industrial scale because of the importance of commercial aspects of a very promising from this rice husk furnace. In rice husk furnace also developed an industrial scale boiler system, boiler systems where it can enlarge its efficiency, in the midst of a boiler chimney pots have used, because basically rice husk furnace process is influenced by air flow. Husk furnace efficiency greatly affect the number of furnace ash which is required in the cooking process.   Keywords: rice husk, rice husk furnaces, air flow, efficiency, boilers. BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2039 BERKALA FISIKA; Vol 13, No 3 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/50739 2022-12-06T10:03:02Z berkala_fisika:ART

nmb a2200000Iu 4500 "221206 2022 eng " 1410-9662 dc IDENTIFIKASI DAN PROTEKSI KEBOCORAN ARUS LISTRIK PADA RUMAH TANGGA Rakasiwi, Zaki Maulana Program Studi D-III Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275 Tadeus, Dista Yoel Jurusan Teknologi Rekayasa Otomasi, Sekolah Vokasi, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275 Mangkusasmito, Fakhruddin Jurusan Teknologi Rekayasa Otomasi, Sekolah Vokasi, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275 Putranto, Ari Bawono Jurusan Teknologi Rekayasa Otomasi, Sekolah Vokasi, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275 Monitoring, Current Leakage, Household Electricity Electric current leakage can occur because the electric current flowing from the phase wire (voltage) to the ground is caused by an insulation leak caused by poor wiring or problematic tools causing sparks that can damage electrical installations, and consequently can cause electric shock to the human body. The research method used is descriptive method with a qualitative approach, and the software development model uses a simulation model. The system is designed using the Arduino Uno controller, with the use of the PZEM-004T sensor as a current leak detector in household electric households. To create a remote monitoring system, MQTT is used which uses a Wi-Fi network to communicate data between a smartphone and a device made by the author. With this tool, the condition of household electricity can be monitored in real time, with an error percentage of 0.09% and 0.14%. Besides being able to be monitored in real time, current and voltage values can be monitored remotely via the Wemos D1 mini data communication media, with a startup speed of 6.31 seconds for each data. BERKALA FISIKA 2022-12-06 10:03:02 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/50739 BERKALA FISIKA; Vol 25, No 3 (2022): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/6581 2014-03-21T15:18:35Z berkala_fisika:EDT

nmb a2200000Iu 4500 "140101 2014 eng " 1410-9662 dc Redaksional Berkala Fisika Hidayanto, Eko Jurusan Fisika, Universitas Diponegoro Semarang Vol 17 No.1 2014 BERKALA FISIKA 2014-03-21 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/6581 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 1 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3065 2012-04-07T08:46:43Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc ANALISIS GUGUS FUNGSI PADA SAMPEL UJI, BENSIN DAN SPIRITUS MENGGUNAKAN METODE SPEKTROSKOPI FTIR Anam, Choirul Laboratorium Fisika Atom & Nuklir, Jurusan Fisika Fakultas MIPA UNDIP Sirojudin, Sirojudin Laboratorium Fisika Atom & Nuklir, Jurusan Fisika Fakultas MIPA UNDIP Firdausi, K. Sofjan Laboratorium Fisika Atom & Nuklir, Jurusan Fisika Fakultas MIPA UNDIP An analysis of functional groups using FTIR (Fourier Transform Infra Red) spectroscopy in test samples, such as petroleum and spiritus compound has been done.The spectral of the functional groups is observed by comparing of the absorption band which is formed on infra red spectrum with the infra red lines standard and comparing with other known compound. It is expected that functional group identification can be done effectively.Infra red spectrums of petroleum show the group of methyl (CH3), alkenes and aromatic compound. That results analysis is supported by appearance of bending symmetric vibration of C-H and the presence of stretching vibration of C=C from aromatic ring. The spiritus spectrums show the group of hydroxyl from alcohol compound. That analysis is supported by appearance of wide band on 3500–3000 cm-1 and appearance of band on 1000–1100 cm-1.  While test sample spectrum show the group of hidroksil (O-H) from primary alcohol, group of metil (CH3), triple bond (C≡C–H), group of nitril (R–C≡N), double bond (C=C) and C-N.   Keyword: FTIR spectroscopy, vibration, infra red spectrum, absorption, functional group BERKALA FISIKA 2012-04-06 10:17:27 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3065 BERKALA FISIKA; Vol 10, No 2 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2786 2012-03-29T12:51:42Z berkala_fisika:RA

nmb a2200000Iu 4500 "120329 2012 eng " 1410-9662 dc Penyetaraan Nilai Viskositas terhadap Indeks Bias pada Zat Cair Bening Eka Jati, Bambang Murdaka Laboratorium Fisika Dasar, FMIPA, UGM, Yogyakarta Karyono, Karyono Laboratorium Fisika Dasar, FMIPA, UGM, Yogyakarta Supriyatin, Supriyatin Mahasiswa S2, Prodi Fisika, FMIPA UGM The research to find out of the relation between viscosity of the liquid (using Viscosimeter Ostwald) to their indeks of refraction (using ABEE refractometer) have been done. It has been chossed the solution of sugar and also solution of salt, at some percentage of concentration (shown on that density variation), and measured their viscosity. Then, those solutions are measured their indeks of refraction. After that, it would be found the relation between their viscosity to their indeks of refraction. The conclusion, it could be found quite linearly graph of viscosity to indeks of refraction of sugar and salt solution for 10 up to 100% in concentration. This relation depends on kind of solution.   Key words: viscosity, indeks of refraction, transparent liquid BERKALA FISIKA 2012-03-28 21:23:50 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2786 BERKALA FISIKA; Vol 13, No 4 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/70079 2025-01-08T09:17:37Z berkala_fisika:ART

nmb a2200000Iu 4500 "240117 2024 eng " 1410-9662 dc ANALISIS CITRA FANTOM PADA PEMERIKSAAN MAMOGRAFI BERDASARKAN PROYEKSI MEDIOLATERAL OBLIQUE DAN CRANIO CAUDAL Salama, Rahmatullah Fisika Medik, Departemen Fisika Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Makassar, Indonesia 90245 Astuty, Sri Dewi Fisika Medik, Departemen Fisika Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Makassar, Indonesia 90245 Dewang, Syamsir Fisika Medik, Departemen Fisika Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Makassar, Indonesia 90245 S., Hikmawati Instalasi Radiologi, RSUD Syekh Yusuf, Gowa, Indonesia 90165. Jumriah, Jumriah Balai Pengamanan Fasilitas Kesehatan, Makassar, Indonesia 90245. mammografi, mediolateral oblique, craniocaudal, jaringan anomali. Mamografi adalah alat yang penting untuk deteksi dini dan diagnosis kanker payudara. Studi ini bertujuan untuk menganalisis profil jaringan dan densitas film dalam pemeriksaan mamografi dengan menggunakan proyeksi mediolateral oblique (MLO) dan craniocaudal (CC). Perbedaan sudut pandang antara keduanya memungkinkan pencitraan yang lebih komprehensif dari jaringan payudara yang sangat penting untuk identifikasi anomali. Komparasi yang dilakukan adalah banyaknya radiasi yang diterima oleh film radiografi berdasarkan kedua proyeksi tersebut serta visual ukuran dan posisi jaringan anomali. Variasi parameter yang menjadi input adalah tegangan tabung 25, 27, 29 dan 31 kV serta tebal fantom 20, 40 dan 60 mm. Parameter kualitatif juga diuraikan berdasarkan ukuran dan kejelasan jaringan anomali atau serat dalam payudara. Hasil menunjukkan nilai densitas citra pada proyeksi CC lebih besar dibandingkan proyeksi MLO. Citra fantom proyeksi CC memperlihatkan permukaan utuh jaringan lesi lebih lebar, sedangkan proyeksi MLO lebih menggambarkan posisi lesi terhadap pusat payudara dan tebal lesi. Proyeksi MLO cenderung memberikan gambaran yang lebih jelas dari area pectoralis mayor, sementara proyeksi CC memberikan visualisasi yang lebih baik dari jaringan sentral payudara. Perbedaan ini memiliki implikasi penting untuk interpretasi klinis dan dapat mempengaruhi keputusan diagnostik. BERKALA FISIKA 2024-01-20 16:27:18 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/70079 BERKALA FISIKA; Vol 27, No 1 (2024): Berkala Fisika eng Copyright (c) 2025 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/9296 2015-10-19T16:18:06Z berkala_fisika:RA

nmb a2200000Iu 4500 "141001 2014 eng " 1410-9662 dc RANCANG BANGUN SENSOR KAPASITIF UNTUK LEVEL AIR Zahrotin, Eli Jurusan Fisika, FMIPA, Institut Teknologi Sepuluh Nopember (ITS) Endarko, Endarko Jurusan Fisika, FMIPA, Institut Teknologi Sepuluh Nopember (ITS) Capacitive sensor for measuring water level has successfully been fabricated and characterized. Capacitive water level sensor has been fabricated using coaxial cylinder with an inner and outer radius at 0,955 and 1,435 cm, respectively. The cylinders have a length of 82 cm. The study was used water and air as dielectrics for filling in the space of two cylinders. The design of sensor based on the principle of cylindrical capacitor with two dielectrics. Measurements of water level repeated three times to ensure an accuracy of data. The ruler was used as calibrator for measurement of water level. The result showed that the capacitive water level sensor can be used to measure water level with the maximum of standar deviation around 1,40, when the system was used to measure increased water levet at 50 cm and standar deviation minimum at 0,01 occured when it was used to measure decreased water level at 0 cm. Range of measurement was 0,16 -78,99 cm with an average error value when measurements of increased and decreased water level was 2.30 and 1.75%, respectively. Keywords: water level, capacitive, coaxial cylinder. BERKALA FISIKA 2015-10-19 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/9296 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 4 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3081 2012-04-07T12:32:22Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pengaruh Ukuran Butir Terhadap Porositas dan Permeabilitas pada Batupasir Nurwidyanto, M. Irham Laboratorim Geofisika Jurusan Fisika Universitas Diponegoro Semarang Yustiana, Meida Laboratorim Geofisika Jurusan Fisika Universitas Diponegoro Semarang Widada, Sugeng Laboratorium Oseanografi Fakultas Ilmu Kelautan Universitas Diponegoro Semarang It has been done a research to know the influence of grain size to permeabiality and porosity on sandstones from Ngrayong Formation, Ledok Formation, Kerek Formation and Selorejo Formation. The Permeability is measured by RUSKA Permeameter Gas, while the porosity is measured by  Porosimeter Gas A-9756 series. The grain size is then determined  using grain size analysis method. After the calculation, the grain size is attributed to permeability and porosity of sandstones with the analysis regresi method. Results obtained indicate that the influence of grain size significant at six sandstones. Based on the statistic calculation it has been obtained the relation  with Linear regression  equation Log k= -5.7 Log d + 15 with r2=0.7, for the grain size to permeability and = -1.9x102d +75 with  r2=0.7,  for the relation of grain size to porosity.   Key Word: sandstone, grain size, porosity, permeability BERKALA FISIKA 2012-04-06 10:20:46 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3081 BERKALA FISIKA; Vol 9, No 4 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2864 2012-03-29T15:40:30Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pemanfaatan Teknik Lissajous untuk Mengetahui Korelasi antara Kandungan Air terhadap Sifat Dielektrik Tanah (Studi Kasus: Sampel Tanah Permukaan di Sekitar Kota Purwokerto) Sehah, Sehah Program Studi Fisika, Fakultas Sains dan Teknik, Universitas Jenderal Soedirman Jl. Dr. Suparno No. 61 Karangwangkal Purwokerto Nur Aziz, Abdullah Program Studi Fisika, Fakultas Sains dan Teknik, Universitas Jenderal Soedirman Jl. Dr. Suparno No. 61 Karangwangkal Purwokerto Irayani, Zaroh Program Studi Fisika, Fakultas Sains dan Teknik, Universitas Jenderal Soedirman Jl. Dr. Suparno No. 61 Karangwangkal Purwokerto The equipment has been designed to measure the dielectric properties of soil samples with lissajous technique in Basic Physics Laboratory, Study Program of Physics, Faculty of Science and Engineering, University of Jenderal Sudirman, Purwokerto. The equipment has been used to measure the dielectric constant of 19 soil samples taken from several locations in area of Purwokerto city and its surrounding, at a frequency of 100 kHz. The measurement has been conducted on soil samples with the variation of soil mass water content. The results obtained indicate, the existence of a correlation between the dielectric constant of soil samples to the soil water mass content (h) which can be expressed with two equations; dielectric permittivity e = 0.3176 h-2.5555 with a correlation coefficient R2 = 0.9538, and dielectric loss equation e'= 0.00003 h -5.3336 with a correlation coefficient R2 = 0.9513. BERKALA FISIKA 2012-03-29 09:57:34 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2864 BERKALA FISIKA; Vol 12, No 3 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/10834 2016-04-21T12:14:24Z berkala_fisika:RA

nmb a2200000Iu 4500 "150701 2015 eng " 1410-9662 dc STUDI PENGARUH UKURAN PIXEL IMAGING PLATE TERHADAP KUALITAS CITRA RADIOGRAF Sudin, Ahmas Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Jl. Prof. H. Soedarto, SH Tembalang, Semarang Muhlisin, Zaenul Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Jl. Prof. H. Soedarto, SH Tembalang, Semarang Widiyandari, Hendri Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Jl. Prof. H. Soedarto, SH Tembalang, Semarang pixel, imaging plate, image quality, contras, density This study aims is to determine the image on imaging plate which has a different pixel sizes. In this research, the X-ray apparatus and Computed Radiography (CR) which is used in the diagnostic field was used. The three imaging plate each having size of 0.097 mm, 0.115 mm and 0.168 mm with stepwedge objects on it was used. The exposure factor was adjusted at 64.5 kV and 16 mAs. The each of imaging plate were exposure three times. The results of each radiograph imaging plate were measured by using a densitometer. By measuring the Stepwedge radiograph, it was obtained the density and contrast value of each imaging plate. Contrast value for each imaging plate were compared to obtain the imaging plate that have a higher contrast value. This research resulted that each different pixel sizes on the imaging plate would generate a different image quality. Keywords: pixel, imaging plate, image quality, contras, density BERKALA FISIKA 2016-04-21 11:48:02 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/10834 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 3 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3098 2012-04-07T12:39:15Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc STUDI SIFAT ELEKTROOPTIS PADA KACA AKUARIUM, KACA PREPARAT, DAN AKRILIK Nila Kusuma, Anis Jurusan Fisika, FMIPA UNDIP, Semarang Firdausi, K. Sofjan Jurusan Fisika, FMIPA UNDIP, Semarang Setia Budi, Wahyu Jurusan Fisika, FMIPA UNDIP, Semarang The properties of electrooptics of transparency media such as aquarium glass, micro slides, and acrylic have been studied. To obtained the change of refractive index (Dn) of materials against external static electric field (E), the samples are placed in two parallel plates applied by potential different of  0 – 104 V. The maximum external field reached by this experiment is in order 106 V/m. The change of refractive index as function of E is measured by Michelson interferometer equipment. First, our results show that the refractive index decreases as E increases for all samples. Second, Dn varies slightly square to E, which is still the dominant of linear electrooptic coefficient. The graphs both of acrylic and slides are rather smooth, which indicates that the crystal structures are more regular than aquarium glass. Key Words: electrooptics, refractive index, static electric field BERKALA FISIKA 2012-04-06 10:20:23 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3098 BERKALA FISIKA; Vol 9, No 2 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2920 2012-03-30T14:32:05Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc PEMBUATAN SOFTWARE PENCATAT PENGUNJUNG PERPUSTAKAAN MENGGUNAKAN BARCODE DAN MYSQL BERBASIS BORLAND DELPHI 7.0 Apriana, Apriana Jurusan Fisika Universitas Diponegoro Semarang Danusaputro, Hernowo Jurusan Fisika Universitas Diponegoro Semarang The library visitors counter system using barcode and MySQL based with Borland Delphi 7.0 has been done for ease in counting the visitors in a library and data to be displayed more accurate and comprehensive. Bar code which printed on visitors card is aimed at barcode scanner to read the code of the identity of visitors who will enter the library. At Borland Delphi 7.0 uses the pascal programming language that is integrated with the input of barcode and database MySQL able to display the time visitors enter the library. From this research it was found that Borland Delphi 7.0 software can read the records in the MySQL database and display properly on a monitor in accordance with the data stored on the visitors database.   Keywords : library, barcode scanner, Borland Delphi 7.0, code barcode, MySQL BERKALA FISIKA 2012-03-29 14:54:02 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2920 BERKALA FISIKA; Vol 12, No 4 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/23483 2019-06-25T13:53:44Z berkala_fisika:RA

nmb a2200000Iu 4500 "190529 2019 eng " 1410-9662 dc METODE AUTOREGRESSIVE INTEGRATED MOVINGAVERAGE (ARIMA) DAN METODE ADAPTIVE NEURO FUZZY INFERENCE SYSTEM (ANFIS) DALAM ANALISIS CURAH HUJAN Wulandari, Rosita Ayu Departemen Fisika Fakultas Sains dan Matematika Universitas Diponegoro Gernowo, Rahmat Departemen Fisika Fakultas Sains dan Matematika Universitas Diponegoro ARIMA, ANFIS, time series data, linear, non-linear Information of rainfall prediction is important for Indonesian peoples. Many statistical methods can be used in rainfall prediction, they are ARIMA (Autoregressive Integrated Moving Average) and ANFIS (Adaptive Neuro Fuzzy Inference System) methods. The purpose of this study was to compare between ANFIS method and ARIMA method to get rainfall prediction in some periods. The ARIMA method was time series data analysis often used in forecasting. While the ANFIS method was forecasting method based on rarely found time series events that are pure linear or non-linear. Based on this study, the ANFIS method has a good accuracy for time series data analysis compared with the ARIMA method. The ANFIS method has 6.9811 for the result of correlation and 87.29% for the RMSE, while result of correlation for the ARIMA method is 14.037 with 24.92% for RMSE. The ARIMA method is not good for prediction of daily data cases and non-linear data, so that the result is not actual which has a constant and flat for data prediction. Keywords: ARIMA, ANFIS, time series data, linear, non-linear  BERKALA FISIKA 2019-05-29 10:45:06 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/23483 BERKALA FISIKA; Vol 22, No 1 (2019): Berkala Fisika Vol. 22 No. 1 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4976 2013-05-27T11:08:16Z berkala_fisika:RA

nmb a2200000Iu 4500 "120101 2012 eng " 1410-9662 dc PERANCANGAN SISTEM PENGENDALIAN SUHU DENGAN PENGENDALI PID MENGGUNAKAN ESTIMASI ARX Khuriati RS, Ainie Laboratorium Instrumentasi Elektronika, Jurusan Fisika, Universitas Diponegoro In this paper ARX estimation methodology used to design a PID controller  for  temperature control of the air heater. The step input applied on heating systems and logging the  data   toMATLAB via a data acquisition system. The data obtained is used to identify the model of the processin the form of ARX. PID parameters obtained by minimising a standard  integral errors using theleast squares  method. Then,  the results were compared with the classical methods Keywords:  PID, Identification,  air heater BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4976 BERKALA FISIKA; Vol 15, No 1 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2936 2012-03-30T15:03:29Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Estimasi Penyebaran Sedimen Cekungan Jawa Timur Dengan Metode Gravity Adib Hasan, Muhamad Jurusan Fisika FMIPA Universitas Diponegoro Semarang Nurwidyanto, M. Irham Jurusan Fisika FMIPA Universitas Diponegoro Semarang This research is a reconnaissance study to predict the distribution and depth of the sediment basin in East Java based on Bouger Anomaly data in gravity method.Bouger anomaly is projected to flat plane used by equivalent point mass source method. Upward continuation is used to separate the regional and residual anomaly.  Modeling sub surface in two dimensions are used by polygon Talwani method by help computer program Geomodel.The results of this research can be concluded that in East Java sediment basin has about 6 km in depth. The central basin are reside in mid of East Java, there are around Sragen, Karanganyar, Ngawi, Madiun, Nganjuk, Kediri, Bojonegoro, Jombang and Mojokerto which in the east west direction. In the eastern part of East Java Basin there are Sidoarjo, Pasuruhan, Probolinggo and Maura bay has direction in northwest to southeast. Key words: Basin, basement, sediment, Bouger Anomaly BERKALA FISIKA 2012-03-30 14:12:23 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2936 BERKALA FISIKA; Vol 11, No 4 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/27310 2020-06-08T13:09:22Z berkala_fisika:ART

nmb a2200000Iu 4500 "191213 2019 eng " 1410-9662 dc STUDI PRODUKSI RADIONUKLIDA MEDIS UNTUK GENERATOR 89Sr/90Y DARI HASIL REAKSI 89Rb(p,n)89Sr/90Y PADA SIKLOTRON MEDIK SECARA KOMPUTASI Hidayat, Yusup Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Wardaya, Asep Yoyo Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Triadyaksa, Pandji Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Setiawati, Evi Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Muhlisin, Zaenul Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Sumariyah, Sumariyah Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Suseno, Jatmiko Endro Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Binu Soesanto, Qidir Maulana Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang medical cyclotron, calculation and modeling, 90Y activity A computational calculation to determine production capacity of 90Y from the results of nuclear reactions 89Rb(p,n)89Sr/90Y from several medical cyclotrons has been carried out. Calculations were used to obtain the target thickness of 89Rb and maximum activity of 90Y on variable energy, time and irradiation currents. Calculations were also carried out to measure the impurity radionuclide activity during the reaction. The results activities of 90Y were obtained through modeling using the SRIM-2013 software and the TENDL-2017 application and calculated using MATLAB software. The results modeling and of calculations can predict the activity of 90Y and it can be used as an initial reference in the radionuclide production process using a cyclotron. The maximum activity of 90Y of 5409.80 mCi with a 10.54 mm-target thickness of 89Rb is generated from a cyclotron which has a 30 MeV proton beam with a 50 μA radiation current beam and 2 hours irradiation time. Using the same proton, current and irradiation time at irradiation energy of 8 MeV, 15 MeV and 22 MeV, the produced activity of 90Y was smaller, there are 552.28 mCi, 2100.39 mCi and 3644.31 mCi. The radioisotope of 90Y can be used in patients with a normal dose of 0.4 mCi / kg body weight, therefore in one production can supply the needs of 104 patients. Keywords: medical cyclotron, calculation and modeling, 90Y activity BERKALA FISIKA 2019-12-12 08:25:35 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/27310 BERKALA FISIKA; Vol 22, No 4 (2019): Berkala Fisika Vol. 22 No. 4 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/2979 2012-04-03T12:35:27Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Estimasi Ketebalan Sedimen dan Kedalaman Diskontinuitas Mohorovicic Daerah Jawa Timur dengan Analisis Power Spectrum Data Anomlai Gravitasi Dwi Indriana, Rina MIPA – FISIKA Universitas Diponegoro Semarang Gravitation anomaly research had been done to predict the depth of sediment. The gravitation research covered East Java from north coast to south coast, Indonesia. By using power spectrum method the average of sediment depth could predicted. Power spectrum method based on FFT theorem. A Short wavelength signal was correspond to narrow source and a long waveleght signal corresponds with shallow source. The power spectrum result was two discontinuities. The depth of narrow discontinuity is 2,7 km and 25,6 for the shallow continuity. The shallow discontinuity predicted as Mohorovicic layer.  Keyword: power spectrum, gravitation anomaly, discontinuity BERKALA FISIKA 2012-04-03 11:52:36 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2979 BERKALA FISIKA; Vol 11, No 2 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/30624 2020-06-08T16:06:35Z berkala_fisika:ART

nmb a2200000Iu 4500 "200430 2020 eng " 1410-9662 dc ESTIMASI UKURAN KRISTAL DAN PARAMETER ELASTISITAS NANOKRISTAL ZnO:Ce MENGGUNAKAN METODE SIZE-STRAIN PLOT Kinasih, Diah Ayu Suci Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Jl. Prof. Soedarto, S.H., Semarang Nurhasanah, Iis Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Jl. Prof. Soedarto, S.H., Semarang ZnO, nanocrystalline, precipitation, size-strain plot The physical properties of nanocrystals depend on the crystallite size that correlates with the characteristics of the crystal structure. This research aims to estimate the crystal size and elasticity parameters of ZnO:Ce nanocrystals based on x-ray profile analysis using the sizestrain pot method. Nanocrystal of ZnO:Ce was synthesized using the precipitation method with a calcination temperature of 500 oC. X-ray diffraction measurements were used to analyze the crystal structure of ZnO:Ce. Identification of x-ray diffraction peaks revealed the formation of ZnO:Ce nanocrystals with hexagonal wurtzite structure and lattice parameter smaller than bulk ZnO. The crystal size of 112 nm and the correlation coefficient of 0.97 obtained from the sizestrain plot method is greater than the Scherrer formula. These results indicate that lattice strain contributes significantly to the broadening of the spectrum profile of x-ray diffraction peaks of ZnO:Ce nanocrystal. BERKALA FISIKA 2020-06-08 15:31:49 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/30624 BERKALA FISIKA; Vol 23, No 2 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5003 2013-05-27T15:53:32Z berkala_fisika:RA

nmb a2200000Iu 4500 "130101 2013 eng " 1410-9662 dc PENGARUH VARIASI KOMPOSISI BRIKET ORGANIK TERHADAP TEMPERATUR DAN WAKTU PEMBAKARAN Tarsito, Teguh Laboratorium Fisika Material Jurusan Fisika FSM Universitas Diponegoro Sutanto, Heri Laboratorium Fisika Material Jurusan Fisika FSM Universitas Diponegoro Marhaendrajaya, Indras Laboratorium Fisika Material Jurusan Fisika FSM Universitas Diponegoro It has been carried out to study of influence of variation composition in organic briquetteabout temperature and duration time combustion briquette that was optimum. Briquette had made that was  briquette with composition rice hull, briquette with composition rice hull and sawdust wood rubber that mixed with glue from amylum gel. Experimental method was used in this research. Briquette sample  was burned and measured the temperature of combustion so we gained the values between temperature with combustion briquette duration time of sample briquette,briquette mass before combustion and mass residue of combustion. From the result of this researchthe conclusions can be made were the sample briquette   have  highest temperature of combustionand longest  duration time of  combustion was sample briquette with composition rice hull andwood rubber sawdust = 4 grams : 6 grams with oven  temperatur  100oC because have longestduration time combustion  over temperature  100oC with fluctuation 100°C-150°C was 12 minutes. Keywords :  briquette,  combustion calor, rice hull BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5003 BERKALA FISIKA; Vol 16, No 1 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3003 2012-04-04T07:38:31Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Arus Terobosan Pada Transistor Dwikutub Struktur Hetero Si/Si1-xGex/Si Anisotropik Melewati Basis Tergradasi (Graded Base) Hasanah, Lilik Jurusan Fisika, Universitas Pendidikan Indonesia, Jl.. Dr. Setiabudhi No 229 Bandung Telp : +62(022)2504548 Khairurrijal, Khairurrijal Kelompok Keahlian Fisika Material Elektronik Program Studi Fisika, FMIPA-ITB Jl. Ganesa 10 Bandung 40212, Telp./Fax. : +62(022)2511848 Tunneling current in bipolar transistors Si/Si1-xGex/Si anisotropic hetero structure for germanium conditions on a constant basis is not analyzed here. The concentration of germanium in the base which is not constant will result in the potential profile at the base is not flat, but will be graded according to the germanium concentration. Tunneling current calculation is performed semi-analytically and numerically. The calculation result obtained then matched with experimental data. The results show that the results of analytical calculations with results of semi-numerical calculations. While analytical calculations with experimental data only flows from the VBE 0.3 to 0.6 V.   Keywords: Tunneling current, germanium concentration, anisotropic material, transfer matrix method, hetero structure bipolar transistor BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3003 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/39828 2021-07-05T11:38:49Z berkala_fisika:ART

nmb a2200000Iu 4500 "210705 2021 eng " 1410-9662 dc RANCANG BANGUN SISTEM KENDALI SUHU DAN KELEMBABAN DARI MINI GARDEN BUNGA KRISAN MENGGUNAKAN SMARTPHONE BERBASIS MIKROKONTROLER Dananjaya, Bachtiar Putra 1Program Stud DIII Insel, Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro, Semarang Sumariyah, Sumariyah Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang mini garden, microcontroller, nodemcu 8266, DHT-11 sensor, telegram The  temperature  and  humidity  control  system  of  the  Krisan  Flower  Mini  Garden  has  been designed and implemented. The main components of this control systems were the NodeMCU 8266 microcontroller and smartphones that communicate using the internet of things (IoT). The system support components include the DHT 11 sensor module as a temperature and humidity sensor,  real time clock (RTC) module, liquid crystal display  (LCD) as a result viewer, relay board  module  and  pump.  The  microcontroller  read  and  processed  the  temperature  and humidity sensor output data in the form of a digital voltage signal. The measurement data were displayed on the LCD with an LED indicator and sent to the Telegram application. If the sensor output did not meet the needs of the Chrysanthemum flower, the microcontroller turned on the actuator to turn on the water pump and lights as irradiation. The system test was carried out in the Chrysanthemum Mini Garden by comparing the LCD reading with standard tools. The test results show a difference in temperature of about 0.2-3 oC and humidity of about 1-7%. BERKALA FISIKA 2021-07-05 11:38:49 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/39828 BERKALA FISIKA; Vol 24, No 1 (2021): Berkala Fisika eng Copyright (c) 2021 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5259 2013-08-01T09:45:04Z berkala_fisika:RA

nmb a2200000Iu 4500 "130701 2013 eng " 1410-9662 dc EVALUASI KUALITAS BEBERAPA JENIS MINYAK GORENG KEMASAN SETELAH DIPANASKAN MENGGUNAKAN SIFAT ELEKTROOPTIS Murni, Sri Jurusan Fisika, FMIPA Universitas Diponegoro Semarang Bawono Putranto, Ari Jurusan Fisika, FMIPA Universitas Diponegoro Semarang Hidayanto, Eko Jurusan Fisika, FMIPA Universitas Diponegoro Semarang Firdausi, K Sofjan Jurusan Fisika, FMIPA Universitas Diponegoro Semarang In this report, we have determined the average value of polarization angle for various edible oils, before and after heating. The change of polarization angle was measured averagebetween potential differences 0-9 kV. The heating time for the samples was conducted up to 10 hours at average temperature by 180°C. The source of light was He-Ne Laser 1 mW (633 nm) with optical length of samples of 1 cm. In agreement to the previous experiment, our result shows that all vegetable oils provide increasing of free radicals indicated by increasing polarizationangle for longer heating time. For the heating time interval 0-10 hours, the level degradation ofoil rises quadratically. From various edible oils, olive oil is still the relative best quality from allsamples in this experiment. This method, once again, shows more powerful relative to otherstandard methods. Keywords: frying oil, electrooptics, polarization angle BERKALA FISIKA 2013-08-01 09:11:11 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5259 BERKALA FISIKA; Vol 16, No 3 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3043 2012-04-07T12:47:49Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Penerapan Pendekatan Modified Free Inquiry Sebagai Upaya Meningkatkan Kreativitas Mahasiswa Calon Guru Dalam Mengembangkan Jenis Eksperimen Dan Pemahaman Terhadap Materi Fisika Khanafiyah, Siti Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Semarang (Unnes) Rusilowati, Ani Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Semarang (Unnes) This study aimed to enhance students' creativity in developing the kinds of experiments and understanding of materials physics, especially wave, with application of the modified approach to free inquiry in the department of Physics, State UNNES. The instrument used a questionnaire to measure creativity, observation sheet to measure the ability psikhomotorik and sheets test to measure the understanding of matter waves. Results were analyzed using a Likert scale questionnaire. Normalized gain formula is used to test the effectiveness of modified free inquiry approach in enhancing students' creativity and understanding of the matter wave. The results showed that the application of modified free inquiry approach that gives freedom to the students to develop creativity, to (1) improve the ability psikhomotorik students, (2) type of experiment, developed into more varied, (3) enhance student creativity, and (4) increase cognitive abilities of students. Keywords: modified free inquiry, creativity BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3043 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/46862 2022-06-13T14:40:23Z berkala_fisika:ART

nmb a2200000Iu 4500 "220613 2022 eng " 1410-9662 dc RANCANG BANGUN SISTEM PENGENDALIAN SUHU DAN KELEMBABAN PADA BOX PENYIMPANAN PRODUK BERBAHAN KULIT BERBASIS MIKROKONTROLLER ARDUINO UNO Umar, Muhammad Syahrir D=III Teknik Elektro, Sekolah Vokasi, Universitas Diponegoro Tadeus, Dista Yoel Teknologi Rekayasa Otomasi, Sekolah Vokasi, Universitas Diponegoro Mangakusasmito, Fakhruddin Teknologi Rekayasa Otomasi, Sekolah Vokasi, Universitas Diponegoro Putranto, Ari Bawono Teknologi Rekayasa Otomasi, Sekolah Vokasi, Universitas Diponegoro Leather products, temperature, humidity, box, Arduino Uno, DHT22, ultrasonic HC- SR04, DS18B20, thermoelectric peltier Fashion items in the form of leather products have good quality and are relatively expensive. Extra care is needed to maintain quality so that there is no damage in the form of skin cracks or faded paint color due to the influence of extreme temperatures and high humidity which can cause fungus in leather-based products. The storage area for leather products is also important, especially in a tropical climate like Indonesia. Ensure that the temperature and humidity in the room for storage of leather products conform to the parameters, namely temperatures between 21 ° C - 25 ° C and humidity  between  50%  -  70%.  The  use  of  storage  boxes  can  be  an  alternative  in  the  care  and storage of leather products which do not take up much space. Design the box using the Arduino Uno  microcontroller  as  controlling  the  system.  DHT22  sensor  for  temperature  and  humidity readings in the box with the peltier thermoelectric TEC1-12706 as a cold temperature generator that will lower room temperature. Additional HC-SR04 ultrasonic sensor for object detection in the box and DS18B20 sensor for temperature reading in the peltier. Monitoring system using 16x2 LCD with temperature and humidity screen display. The system works from controlling the Arduino Uno, reading the temperature of DHT22 as a switching peltier and water pump. Then the DS18B20 temperature reading is used as a switching fan cooler and the DHT22 humidity reading is used as a switching fan exhaust. BERKALA FISIKA 2022-06-13 14:40:23 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/46862 BERKALA FISIKA; Vol 25, No 1 (2022): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/6576 2014-03-21T15:22:43Z berkala_fisika:RA

nmb a2200000Iu 4500 "140101 2014 eng " 1410-9662 dc Perancangan Model Pengukuran Jarak Menggunakan Computer-Aided pada Kontrol Kualitas Ultrasonografi Fallo, Frida Program Studi Magister Ilmu Fisika, Universitas Diponegoro Semarang Adi, Kusworo Jurusan Fisika, Universitas Diponegoro Semarang Suryono, Suryono Jurusan Fisika, Universitas Diponegoro Semarang This research purposes are to do some quality tests through a distance measuring calculation using computer-aided system in a USG image projection and to analyze the distance measuring. In concerning with the design and its implementation, this research used digital tabulation method of image projection to compute and to analyze the distance measuring. The image value was established by variation of attenuation, TGC, and depth. Image tabulation was processed with ROI establishing and the cropping method. In depth variation, the average real distance of USG image resolution is 1 cm, the average value of vertical distance accuration of the image is 0.9747, thus the error value of the vertical distance accuration is 0.0253 cm or 0.253 mm or 0.253 % from the real distance and  the average value of the horizontal distance accuration of the image is 0.998 cm thus the error value of the horizontal distance accuration is 2x10-3 cm or 0.02 mm or 0.02 % from the real distance. For the variation of attenuation, the average value of vertical distance accuration of the image is 0.967 thus the error value of the vertical distance is 0.033 cm 0.33 mm or 0.33 %, and  the average value of the horizontal distance accuration of the image is 0.986 cm thus the error value of the horizontal distance is 0.014 cm 0r 0.14 mm or 0.14 %. Thus the error value for the vertical distance accuration is 0.031 cm or 0.31 mm or 0.31 % from the real distance. The result of the all tested components showed that the tested USG machine fullfiled the qualification of The American Association of Physicists in Medicine (AAPM) criteria. Keywords : USG, Quality Control, Distance Accuration, Computer-Aided BERKALA FISIKA 2014-03-21 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/6576 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 1 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3060 2012-04-07T08:43:45Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Rancang Bangun Sistem Pengukur Konsentrasi Larutan Tembaga Sulfat (CuSO4) Menggunakan Komputer Sumariyah, Sumariyah Laboratorium Instrumentasi dan Elekronika Jurusan Fisika, FMIPA UNDIP Endro Suseno, Jatmiko Laboratorium Instrumentasi dan Elekronika Jurusan Fisika, FMIPA UNDIP L, Fitria Laboratorium Instrumentasi dan Elekronika Jurusan Fisika, FMIPA UNDIP A system  of    Sulphate Copper (CuSO4) liquid consentration measurement by using compute has been made. The display of it through monitor in the computer with the limitation of measurement  0.1 M to 1M. The main components of the measure system of   Sulphate Copper (CuSO4) liquid consentration are : tungsten filamen light which include in the sample and photodioda light sensor also IC 741 as a Operational Amplyfier to strengthen the tension of sensor output. As the chage of the output analog signal power tobe digital signal ADC 0809 is used. And also as an interfce which is the pheripheral instrument of communication equipment with computer is used PPI 8255. The software on  this measure system uses Turbo Pascal version 7.0. This system had been realized and can measure the Sulphate Copper (CuSO4) liquid consentration wich the linier regresion equal is , with X hole is the sample consentration (M) and Y hole is the measure result of the concentration (M) and the deviation is 0.0326. BERKALA FISIKA 2012-04-06 10:17:20 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3060 BERKALA FISIKA; Vol 10, No 3 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2708 2012-03-29T15:32:53Z berkala_fisika:RA

nmb a2200000Iu 4500 "120329 2012 eng " 1410-9662 dc Pengaruh Penggunaan Cermin Datar Dalam Ruang Tertutup Pada Sel Surya Silikon Sidopekso, Satwiko Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta (UNJ) Jl. Pemuda No. 10, Rawamangun, Jakarta 13220 Yumanda, Vony Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Jakarta (UNJ) Jl. Pemuda No. 10, Rawamangun, Jakarta 13220 Efforts to optimize the electrical output of solar modules by maximizing the intensity of light that falls onto the surface of solar modules using a flat mirror (mirror room). The results obtained revealed that there is increasing output of solar modules. Value of Isc, Voc and the highest P consecutive outs in the amount of amperage 2:13; 20.483 35.34 volts and watts. While the value of Isc, Voc and the highest P out without a mirror room which was 0.78 amperes, respectively; 19.24 volts and 12 watts. Percentage increase in solar module output power can reach 64.22%, the highest efficiency solar module to the mirror room of 13.47% by using low lamp power.   Keywords: Solar Module; Electric Output Optimalization; Mirror Room  BERKALA FISIKA 2012-03-28 21:38:25 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2708 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/60739 2023-12-17T10:05:13Z berkala_fisika:ART

nmb a2200000Iu 4500 "231217 2023 eng " 1410-9662 dc ANALISIS DISTRIBUSI TINGKAT PENCAHAYAAN RUANG-RUANG KELAS DI DEPARTEMEN FISIKA Khuriati, Ainie Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro boxplot, lux, pencahayaan, persepsi, SNI 03-6575-2001 Kenyamanan  siswa  dalam  kelas  salah  satunya  bergantung  pada  tingkat  pencahayaannya. Pencahayaan  dalam  ruangan  yang  tepat  sangat  penting  terutama  di  ruang  kelas  pada  gedung pendidikan.  Kurangnya  tingkat  pencahayaan    dalam  kelas  mengarah  pada  berkurangnya kemampuan  akademik  siswa.    Untuk  memperoleh  seberapa  valuasi  kenyamanan  dilakukan pengukuran  tingkat  pencahayaan  dan  kuesioner  untuk  mengetahui  persepsi  siswa.  Pengukuran dilakukan  menggunakan  alat  ukur  pribadi  dengan  sensor  BH1750  dan  komputer.  Komputer berfungsi sebagai antarmuka dan penyimpan data pengukuran. Tujuan utama dari artikel ilmiah ini adalah  untuk  (1)  mengidentifikasi  tingkat  pencahayaan    melalui  pengukuran  di  ruang  kelas,  2) menganalisis distribusi tingkat pencahayaan di lingkungan kelas berkenaan dengan kenyamanan, dan 3) mengevaluasi  hasil pengukuran terhadap SNI. Hasil menunjukkan bahwa hanya satu kelas yang memiliki distribusi tingkat pencahayaannya merata, satu kelas cenderung terdistribusi secara normal, dan kelas lainnya memiliki distribusi yang cenderung miring ke kiri. Meskipun dari ketiga kelas  tidak  ada  yang  memenuhi  kriteria  SNI,  namun  ternyata  tidak  mengganggu  dalam  proses belajar mengajar, siswa tetap dapat membaca dan menulis secara jelas. BERKALA FISIKA 2023-12-17 10:05:13 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/60739 BERKALA FISIKA; Vol 26, No 2 (2023): Berkala Fisika eng Copyright (c) 2023 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/8880 2015-08-01T18:12:12Z berkala_fisika:RA

nmb a2200000Iu 4500 "140701 2014 eng " 1410-9662 dc DETEKSI ARITMIA BLOKADE CABANG BERKAS KIRI PADA ELEKTROKARDIOGRAM DENGAN JARINGAN SYARAF TIRUAN BERDASARKAN FITUR INTERVAL QR DAN RS Primadyanie, Nistya Rischa Jurusan Fisika, Fakultas MIPA Universitas Sebelas Maret, Surakarta Nuryani, Nuryani Jurusan Fisika, Fakultas MIPA Universitas Sebelas Maret, Surakarta Purwanto, Hery Jurusan Fisika, Fakultas MIPA Universitas Sebelas Maret, Surakarta Yahya, Iwan Jurusan Fisika, Fakultas MIPA Universitas Sebelas Maret, Surakarta Lestari, Anik Fakultas Kedokteran, Universitas Sebelas Maret, Surakarta Left branch bundle block (LBBB) detection system have been done and tested. The system created by using Artificial Neural Network (ANN). Some ANN methods have been investigated.  Electrocardiogram features that represent the characteristic of LBBB which were QR interval and RS interval used as input. Output of the system was electrocardiogram status to detect LBBB and normal beat. LBBB detection has been done with various input with QR interval, RS interval, QR and RS interval. Detection system have been tested using chlinical data and shown that MLP method gave the best performance. Its performance shown by sensitivity, specificity, and accuracy up to 99,92%, 100%, and 99,94% . Keywords: LBBB, artificial neural network, QR interval, RS interval BERKALA FISIKA 2015-08-01 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/8880 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 3 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3076 2012-04-07T08:53:16Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Kajian Fisis Radiasi Plasma Terhadap Organ Daun pada Pertumbuhan Awal Tanaman Anggrek Phalaenopsis amabilis [Physics Observation of Plasma Radiation for Leaves to Initial Growth of Phalaenopsis amabilis] Nur, Muhammad Jurusan Fisika FMIPA UNDIP Setiari, Nintya Jurusan Biologi FMIPA UNDIP Azam, Much. Jurusan Fisika FMIPA UNDIP Selawanti, Ika Indah Jurusan Fisika FMIPA UNDIP The Phalaenopsis amabilis (”anggrek”) has been irradiated by nitrogen ions for growth  accelereting.Irradiation technique used corona plasma technology that its electrodes configuration was point-to-plan geometry to generate nitrogen ions in air. Corona glow discharge Plasma has been generated by DC Voltage of 3.50 kV and current was 0,23 mA.  Nitrogem ions that were irradiated to Phalaenopsis amabilis (”anggrek”) have been bombarded to  leaf organ during 1 to  7 minutes. We used two types Phalaenopsis amabilis control:  control with fertilizer and control without fertilizer. Growing of Phalaenopsis amabilis  can be accellereted about 90 % compare with control without  fertilizer and 30 % compare with control with fertilzer. The maximum growing of Phalaenopsis amabilis by using plasma technology for time irradiation of 1 or 2 minutes.   Key words  : corona glow discharge plasma, Phalaenopsis amabilis (anggrek), nitrogen, ion electrons,  free radicals. BERKALA FISIKA 2012-04-06 10:17:48 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3076 BERKALA FISIKA; Vol 10, No 1 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2827 2012-03-29T14:43:26Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Solusi Numerik Model Dinamik Perlakuan Immunotherapy pada Infeksi HIV-1 Kartono, Agus Laboratorium Fisika Komputasi Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor, Jalan Meranti, Gedung Wing S, Lantai 2, Kampus IPB Darmaga, Bogor 16680 Rosidah, Rosidah Laboratorium Fisika Komputasi Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor, Jalan Meranti, Gedung Wing S, Lantai 2, Kampus IPB Darmaga, Bogor 16680 Arif, Ardian Laboratorium Fisika Komputasi Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor, Jalan Meranti, Gedung Wing S, Lantai 2, Kampus IPB Darmaga, Bogor 16680 There are several types of treatment options that can slow the progression of HIV that can be offered if the number of CD4 + cells has been known for certain, one treatment is by immunotherapy with interleukin-2 (IL-2). This type of treatment is to increase the immune system that can help the body fight against the infection itself. Efforts to raise an immune response would be appropriate to reduce the amount of virus. This brings new hope for treatment of HIV infection and the type of treatment is being researched. Interleukin-2 (IL-2) is most of the cytokines which are proteins made by the body. T-helper cells, a type of white blood cells, produce IL-2 when they were stimulated by infection. In this study, a model of HIV disease progression than individuals not treated can be expressed in a mathematical model, and also expressed immunotherapy model to see the dynamics of viral populations and the population of CD4 + T cells from HIV disease based on ordinary differential equation (ODE). This study aims to calculate the numerical solution immunotherapy mathematical model in HIV infection and a mathematical model to predict the outcome of immunotherapy treatment strategies in HIV infection. Keywords: HIV, CD4 + T cells, immunotherapy, mathematical modeling BERKALA FISIKA 2010-10-22 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2827 BERKALA FISIKA; Vol 13, No 1 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/75304 2025-07-01T01:08:35Z berkala_fisika:ART

nmb a2200000Iu 4500 "250630 2025 eng " 1410-9662 dc EVALUASI AKURASI PENGUKURAN UNTUK PERUBAHAN POLARISASI KECIL DI UDARA Firdausi, K. Sofjan Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang. Winarno, Winarno Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang. Hapsari, Berliana Y. Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang. aktivitas optis, udara, ralat sistematis, perubahan polarisasi. Secara umum, udara dianggap sebagai medium non-optis aktif berdasarkan sifat kiralitas molekulnya, dan sering digunakan sebagai referensi nol praktis dalam pengukuran aktivitas optis. Penelitian ini bertujuan untuk menguji akurasi pengukuran aktivitas optis pada sampel udara serta mengidentifikasi ralat sistematis yang mungkin timbul dari penggunaan polarimeter sederhana. Sumber cahaya dengan panjang gelombang 635 nm, 532 nm, dan 405 nm digunakan dan dipolarisasi linier, dengan variasi sudut polarisator dari 0° hingga 90° dalam kenaikan 5°. Perubahan sudut polarisasi diukur menggunakan analisator digital dengan skala terkecil 0,01°. Hasil menunjukkan adanya ralat sistematis rata-rata sebesar 0,036°, yang kemungkinan disebabkan oleh ketidaksejajaran sumbu antara polarisator dan analisator. Selain itu, deviasi pengukuran antara –0,04° hingga 0,12° diduga berasal dari kombinasi noise elektronik dan kesalahan paralaks. Meskipun secara teoritis tidak terjadi rotasi, karena udara dan kuvet bersifat non-optis aktif, hasil eksperimen menunjukkan adanya ambang sensitivitas sistem dalam mendeteksi rotasi sudut, yang mencerminkan adanya ralat sistematis tetap serta keterbatasan resolusi alat ukur. BERKALA FISIKA 2025-06-30 09:08:52 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/75304 BERKALA FISIKA; Vol 28, No 1 (2025): Berkala Fisika eng Copyright (c) 2025 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/9667 2015-12-08T10:02:22Z berkala_fisika:RA

nmb a2200000Iu 4500 "150401 2015 eng " 1410-9662 dc GENERATOR PEMBANGKIT PLASMA DENGAN KONFIGURASI ELEKTRODA BATANG TIPIS DAN JARUM Wardaya, Asep Yoyo Jurusan Fisika, Universitas Diponegoro, Semarang Nur, Muhammad Jurusan Fisika, Universitas Diponegoro, Semarang plasma generator, thin rod and needle configuration electrodes, electric field, saturated current. The application of plasma generator has been developed for everyday live because it can generate high electric field and induced current, even by only 12 volt of potential difference. The advantages of the plasma generator are mainly caused by configuration form of its electrodes which is usually very sharp and asymmetric form. In this paper, plasma generator has been discussed using electrodes configuration of the thin rod and needle in two dimensional planes. The result shows that the plasma generator can produce various high electric fields, which highest field at the tip of needle electrode. In case of configuration of needle electrode, it will be produced saturated current due to their asymmetric electrodes, while in case of thin rod electrode; it will be no saturated current due to symmetric electrode. Keywords: plasma generator, thin rod and needle configuration electrodes, electric field, saturated current. BERKALA FISIKA 2015-12-08 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/9667 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 2 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3093 2012-04-07T10:32:25Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Rancang Bangun Sistem Pengukur Konduktivitas Larutan Elektrolit Menggunakan Mikrokontroler AT89C51 Sumariyah, Sumariyah Jurusan Fisika FMIPA UNDIP Semarang Yulianto, Tony Jurusan Fisika FMIPA UNDIP Semarang Priyono, Jumadi Jurusan Fisika FMIPA UNDIP Semarang A system of electrolyte conductivity measurement has been designed and realized using microcontroller AT89C51. The system run at the frequency 2.5 Mhz. The adventage of the system is conductivity sensor placed outside the sample liquid. The input of system is NaCl concentration  and the output is conductivity value.The hardware of this system is built by a conductivity sensor, oscillator      XR-2206, a frequency synthesizer IC CMOS 4046, an operational amplifier LM358, an analog to digital converter ADC 0804, a liquid crystal display Seiko M1632, and a microcontroller AT89C51. To control this electrolyte liquid conductivity measurement was used macro assembler machine language.The results of the experiment show that the test of variable oscillator function has linear regression equation Y = 0.56 X + 1.96, amplification of LM358 amplifier test is 3.39 and has linear regression equation Y = 3.28 X + 0.05, ADC0804 conversion function has linear regression equation Y = 51.29 X + 9.97. The test of measurement system was sown that instrument able to measure NaCl conductivity from 0.2 M until  2.0 M with linear regression equation  Y =  67,63x + 6,37. BERKALA FISIKA 2012-04-06 10:20:34 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3093 BERKALA FISIKA; Vol 9, No 3 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2886 2012-03-29T15:28:20Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Studi Efek Elektrooptis Pada Minyak Goreng Widyastuti, Nina Laboratorium Optoelektronika dan Laser, Jurusan Fisika, FMIPA Undip Azam, Much Laboratorium Optoelektronika dan Laser, Jurusan Fisika, FMIPA Undip Firdausi, K. Sofjan Laboratorium Optoelektronika dan Laser, Jurusan Fisika, FMIPA Undip The aim of this research is to study differences between fresh palm oil and heated palm oil in the external static electric field. The external electric field used at this research was resulted from two parallel plates of 5 × 3 cm, separated by 2.5 cm and applied by high voltage from 0 to 11 kV. Light sources used here were red laser pointer (= 650 nm) and green laser pointer (= 532 nm) to measure change of polarization angle. The heated oil used here was fresh oil that was heated in circa 16 minutes. The results indicate that fresh oil has less average gradient of electro optic polarization (h) than heated oil, both of 650 nm and 532 nm. Theh’s value is measured more significant for = 532 nm than= 650 nm, and moreover can be used to measure the quality of oils based on fresh or polluted oil.        Keywords: palm oil, electrooptic, polarization. BERKALA FISIKA 2012-03-29 09:48:12 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2886 BERKALA FISIKA; Vol 12, No 2 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/23477 2019-06-25T13:39:07Z berkala_fisika:EDT

nmb a2200000Iu 4500 "190529 2019 eng " 1410-9662 dc DOKUMEN PUBLIKASI ILMIAH: WARISAN YANG TAK TERNILAI HARGANYA Anam, Choirul Departemen Fisika, Fakultas Sains dan Matematika Universitas Diponegoro DOKUMEN PUBLIKASI ILMIAH: WARISAN YANG TAK TERNILAI HARGANYA BERKALA FISIKA 2019-05-29 10:45:06 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/23477 BERKALA FISIKA; Vol 22, No 1 (2019): Berkala Fisika Vol. 22 No. 1 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4971 2013-05-27T11:15:05Z berkala_fisika:RA

nmb a2200000Iu 4500 "111001 2011 eng " 1410-9662 dc APLIKASI PRAKTIS MODEL IDENTIFIKASI AUTOREGRESSIVE MOVING AVERAGE EXOGENOUS (ARMAX) DENGAN METODA KUADRAT TERKECIL REKURSIF Khuriati RS, Ainie Laboratorium Instrumentasi dan Elektronika, Jurusan Fisika, Universitas Diponegoro AbstractEffect on variations in power heating to air temperature in the mosquito box were modelled. Transfer function for temperature ranges from 34.93 oC to 39.93 C determinedexperimentally. A step function used to excite power control and its effect on the air temperaturemeasured. From these information, the transfer function in the ARX and ARMAX form determinedand compared. An analysis of the computational results has confirmed that the ARMAX model andthe recursive least square method are superior to the ARX model and the Extended Least Square method to model the thermal behaviour in the mosquito box as indicated by the level of fitting and system stabilityted Keywords: Identification, prediction error method, caged mosquitoes BERKALA FISIKA 2013-05-25 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4971 BERKALA FISIKA; Vol 14, No 4 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2932 2012-03-30T14:29:24Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc PENENTUAN SOLUSI NUMERIK PERSAMAAN BKdV DENGAN METODE BEDA HINGGA Sehah, Sehah Program Studi Fisika, Fakultas Sains dan Teknik, Universitas Jenderal Soedirman Jalan dr. Suparno, No. 61 Karangwangkal Purwokerto, Jawa Tengah, 53123. Aminuddin, J. Program Studi Fisika, Fakultas Sains dan Teknik, Universitas Jenderal Soedirman Jalan dr. Suparno, No. 61 Karangwangkal Purwokerto, Jawa Tengah, 53123. The innovative knowledge for modelling of the wave propagation is solitary waves. The dynamical model of solitary wave represented in Korteweg de Vrise (KdV) equation form. In this modelling assumed that the KdV equation has not perturbation sign, so called Basic Korteweg de Vries (BKdV) equation.  This modelling begins from expressing of the BKdV equation into to discrete form as its linear form using implicit scheme for finite difference method. Then, it linear form constructed into matrix form.  The solution of matrix form determined using Gauss-Jordan method for resulting of the numerical solution of the BKdV equation. numerical solution was representing on the surface-graphic for the wave envelope as representation of the dynamical non linear in the water.  This modelling results indicating that the wave envelope  was has distortion of initial amplitude  on longstanding of time.  It indicate  that the fluid energy was has distortion on longstanding of time. Key Word: Soliton, KdV, Numerical, Wave, Envelope BERKALA FISIKA 2012-03-29 14:56:20 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2932 BERKALA FISIKA; Vol 12, No 1 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/25483 2019-09-17T16:39:09Z berkala_fisika:ART

nmb a2200000Iu 4500 "190917 2019 eng " 1410-9662 dc RANCANG BANGUN PERANGKAT LUNAK UNTUK PERHITUNGAN SEL DARAH MERAH NORMAL DAN TERINFEKSI MALARIA Setyowati, Setyowati Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Adi, Kusworo Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Anam, Choirul Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang malaria, calculation of blood cell, infected blood cell Malaria is a serious global health problem. Calculation of normal and malaria-infected red blood cells is manually calculated on image of the blood taken by the light microscope. The calculation of the normal and the malaria-infected red blood cells is to know the percentage of parasites and their growth. In addition, it was used to determine the percentage of inhibition parasite growth. The aim of this study is to automatically calculate a total, normal and malariainfected red blood cells. The steps for the calculation of the total of red blood cells: normalization, thresholding, separation and calculation of the red blood cells by labeling. The steps of calculation of malaria-infected red blood cells: converting RGB image to grayscale and to binary image, sweeping, and the calculation of malaria-infected red blood cells. The normal red blood cells can be determined by subtracting the total of the red blood cells with the malaria-infected red blood cells. This software is able to automatically calculate the total, normal and malaria-infected red blood cells. The results of automated calculation with the developed software are not different from a manual calculation. The calculation error of the program compared to the manual calculation is only one or two of the red blood cells for each image. Keywords: malaria, calculation of blood cell, infected blood cell. BERKALA FISIKA 2019-09-17 16:39:09 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/25483 BERKALA FISIKA; Vol 22, No 3 (2019): Berkala Fisika Vol. 22 No. 3 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4987 2013-05-27T16:02:40Z berkala_fisika:RA

nmb a2200000Iu 4500 "120701 2012 eng " 1410-9662 dc PENENTUAN CT DOSE INDEX (CTDI) UNTUK VARIASI SLICE THICKNESS DENGAN PROGRAM DOSXYZNRC Andriani, Intan Jurusan Fisika Universitas Diponegoro Semarang Anam, Choirul Jurusan Fisika Universitas Diponegoro Semarang Setiawati, Evi Jurusan Fisika Universitas Diponegoro Semarang The calculation of CT dose and CTDI has been done by using DOSXYZnrc software. Two kinds of phantoms have been used, i.e air and PMMA phantoms. The volume of phantoms 16 x 16x 16 cm3. The simulation carried out at 120 kV and the particles source 106. The calculation ofdose at the mid of phantom at the z axis, every voxel 0,2 x 0,2 x 0.2 mm3. The  variation of slicethickness were 5 mm, 10 mm, 15 mm and 20 mm. The dosages at every point then were plotted tofind out dose profile, and then were integrated to find out the CTDI. It was obtained that the peakvalue  on the air phantom has a higher value than the PMMA phantom. In the air phantom at theslice thickness of 5 mm, 10 mm, 15 mm and 20 mm were 68.28%, 80.49%, 90.91%, 99.86%. Whilein PMMA were 63.68%, 77.42%, 89.32%, 100%. At the penumbral region, it was obtained thatdosage at the PMAA phantom has a higher than the air phantom. CTDI from the PMAA phantomwas 212.50% and the air phantom was 184%. It was obtained that CTDI independent of slicethickness at the range 5-20 cm. Keywords: DOSXYZnrc, Slice thickness, CTDI BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4987 BERKALA FISIKA; Vol 15, No 3 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/30619 2020-06-08T15:30:47Z berkala_fisika:ART

nmb a2200000Iu 4500 "200131 2020 eng " 1410-9662 dc PENGEMBANGAN KARAKTERISTIK OPTIS PADA LARUTAN PERAK KOLOID MENGGUNAKAN METODE ELEKTRO-OPTIS Tiwiyaningsih, Tiwiyaningsih Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Rahmawati, Aidah Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Nurhasanah, Wahidatun Dewi Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Richardina, Very Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Khumaeni, Ali Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Firdausi, Ketut Sofjan Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Sugito, Heri Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Soesanto, Qidir Maulana Binu Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Azam, Much Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Light polarization, electrooptical polarization, colloidal silver solution In this paper we present a new development of optical properties on colloidal silver solutions using electro-optics effect. Samples of silver nanoparticles (NPP) were obtained by ablation method and then diluted in water to obtain various concentrations. To obtain optical characteristics of colloidal silver solutions through the electro-optical effect, the changes in the polarization of light was measured as the sample was applied by high external potential difference. The light source used was laser pointer with  = 650 nm. The results show that the colloidal silver solution shows non-linear active optical properties with increasing concentration and at a concentration of 4.6 ppm maximum natural polarization occurs. In the case of electro-optics, a voltage increase results in electro-optical contributions which correspond to the effects of non-linear polarization due to high electric fields. However, at 8 kV the maximum polarization appears also at a concentration of 4.6 ppm, which is the same as the natural polarization at that concentration. The study of colloidal silver solutions is very interesting to be further developed by electro-optical methods, because challenges and unanswered phenomena can contribute or alternative perspectives in understanding the interaction of light with matter, especially colloidal silver solutions, and the like. BERKALA FISIKA 2020-06-08 13:14:30 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/30619 BERKALA FISIKA; Vol 23, No 1 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4998 2013-05-27T16:00:23Z berkala_fisika:EDT

nmb a2200000Iu 4500 "121001 2012 eng " 1410-9662 dc Berkala Fisika Berkala Fisika, Tim Redaksi Jurusan Fisika Fakultas Sains dan Matematika Universitas Diponegoro Berkala Fisika Vol 15 No 3 (2012) BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4998 BERKALA FISIKA; Vol 15, No 4 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2998 2012-04-04T07:35:26Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Sistem Pendeteksi Suhu dan Asap Pada Ruangan Tertutup Memanfaatkan Sensor LM35 Dan Sensor AF30 Usuman, Ilona Laboratorium Elektronika dan Instrumentasi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Gadjah Mada Aardhi, Hasmi Laboratorium Elektronika dan Instrumentasi, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Gadjah Mada As is known together for this cause of the fire is very varied, ranging from natural factors, or electrical short circuit can occur because of the element of intent. Due to these reasons, so it is necessary to have a system that can detect early occurrence of fire. Fire monitoring system must be able to accommodate the nature of the fire.By leveraging the LM35 sensor that functions observed rise in temperature and observing the presence of smoke sensors AF30 can be created around the smoke detector and temperature using LM35 sensor and microcontroller AT89S51 AF30 sensor and equipped with facilities to send sms if there is any indication of a hazard or fire will occur. The results show that the system could work well in the prototype room with a distance of heat source and smoke source ± 5cm from the two sensors, when the system detects hot and smoke, the water pump, buzzer and fan that is connected to a relay works, then sms will be sent to the user. The temperature sensor detects the heat from 25 degrees to 60 degrees, while the temperature is 55 degrees is considered dangerous. Sensors detect smoke cloud of smoke from 30 to 125 mvolt mvolt, cloud of smoke which is considered the danger is over 125 mvolt.   Keywords: Fire, LM35 temperature sensor, smoke sensor AF30, Short Message Service (SMS) BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2998 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/34497 2020-11-26T09:44:32Z berkala_fisika:ART

nmb a2200000Iu 4500 "201126 2020 eng " 1410-9662 dc ELECTRIC FIELD CONTOURS IN NON-UNIFORM ELECTRODE SHAPE Umiati, Ngurah Ayu Ketut Departemen Fisika, Universitas Diponegoro Semarang Facta, Mochammad Departemen Teknik Elektro, Universitas Diponegoro Semarang Silent discharge is well known method to initiate plasma reaction because initial  discharge is easily triggered by implementing high voltage to the pair of coupled electrodes with a distance. However,  it  is  very  difficult  to  determine  the  exact  amount  of  the  voltage  that  initiates  the discharge.  There  are  many  factors  influence  the  condition  of  initial  discharge  such  as dimensions,  type  and  geometrical  shapes  of  electrode,  thickness  of  insulation,  and  type  of electric field inside the gap between the electrodes. To obtain lower initial discharge voltage, it is urgent to find the best electrode shape producing electric field contours in line with electron emission triggering. This work examines the behavior of electric field and the applied voltage surrounding  electrodes  by  investigating  the  mathematical  expression  for  given  voltage  and generated  electric  field.  The  mathematical  relationship  then  gives  a  basis  of  theoretical background for electric field contours of two shape electrodes. It is also well known that among many electrodes, the non-uniform geometrical shape is preferred to initiate electric field easily. In this study, a hole shape and a bulge type electrode are investigated. Keywords: silent discharge, electric field, differential equation, electrode shape  BERKALA FISIKA 2020-11-26 09:44:32 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/34497 BERKALA FISIKA; Vol 23, No 4 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5213 2013-07-30T08:52:54Z berkala_fisika:RA

nmb a2200000Iu 4500 "130401 2013 eng " 1410-9662 dc PENGARUH JARAK PADA KUALITAS CITRA HASIL REKONSTRUKSI MODE FAN BEAM DENGAN GEOMETRI DETEKTOR BERUPA GARIS Anam, Choirul Jurusan Fisika, Universitas Diponegoro, Semarang Widodo, Catur Edi Jurusan Fisika, Universitas Diponegoro, Semarang Image recontruction for fan beam mode with line geometry of detectors have been done. Theobject being imaged is the Shepp-Logan phantom with matrix size 50x50. Projections were made forangle 00 to 3600 with angle interval 10. The distance between the rays in the midle of the object (s) isequivalent to 1 pixel. The distance of source to central of object (D) were varied 40,50, 60, 70, 80, 90,100, 110 pixels. Reconstruction of image was carried out by the method of filtered back projection(FBP) with Lek-Ram filter. It is obtained that if the distance of X-ray source and center of the object,smaller than 3/4 diagonal object, the image will be distorted, and if the distance is greater than 6/7diagonal object, the image will be clipped.Keywords: Image reconstruction, fan beam, line geometry of detector BERKALA FISIKA 2013-07-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5213 BERKALA FISIKA; Vol 16, No 2 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3038 2012-04-07T12:46:04Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Membangun Filter Berdasarkan Model Amblesan dan Dinamika Muka Air Tanah Untuk Memisahkan Sumber Anomali Gaya Berat Mikro Antar Waktu Supriyadi, Supriyadi Jurusan Fisika FMIPA Universitas Negeri Semarang Filter has been fabricated based on the model of microgravity two sources of anomalies over time, ie subsidence and groundwater level dynamics. Model adjusted for field conditions with several assumptions, one of which is the porosity of the aquifer consists of homogeneous sand and clay sand is 30% filled with water.  Gravity response due to subsidence, soil water dynamics and combined the two done 2D FFT. FFT process is changing the data from the spatial region to region frekuensi. Furthermore, the filter is built by performing mathematical operations division, which is output divided by input. The output data of the gravity response due to subsidence or ground water dynamics, and input is combined response and the dynamics of gravity due to subsidence of ground water. Experimental results show that in order to create a filter that gives a small error when using filters subsidence dimensional (XY) of the same or greater dimension of subsidence are filtered. Differences dimensional subsidence subsidence filter with a filter at X = 100 m and Y = 100 m gives 1.744% error. Giving a small error when using filters subsidence dimension (Z) the same or smaller dimensions are filtered subsidence. Differences dimensional subsidence subsidence filter with a filter of 1 cm gives 7.322% error. For the case of subsidence of more than one location indicates that the smallest error occurs if you use the filters subsidence dimension equal to - average dimensions of subsidence to be filtered.   Keywords: filter, subsidence, groundwater BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3038 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/44187 2022-01-16T05:50:03Z berkala_fisika:ART

nmb a2200000Iu 4500 "220116 2022 eng " 1410-9662 dc PENENTUAN AKUMULASI RADIOFARMAKA Tc99m MDP PADA SPINE DAN STERNUM SAAT PEMERIKSAAN BONE SCAN PASIEN KANKER PAYUDARA Arifah, Dwi Intan RSPAD Gatot Soebroto Setiabudi, Wahyu Departemen Fisika, Universitas Diponegoro Semarang Tc99m Methylene Diphosponate, bone scan, breast cancer Based on data from Indonesian Health Ministry, breast cancer is the type of cancer with the highest prevalence in Indonesia amounted to 0.5% in 2013. This study aims to determine the accumulation of  activity  Tc99m  Methylene  Diphosponate  (MDP)  on  the  bone  around  the  breast,  spine  and sternum. This study was conducted on 30 patients undergoing the bone scan using in vivo nuclear medicine technique. The study was conducted using Tc99m obtained from elution of Mo99 generator and mixed with MDP. Bone scan was performed by injecting Tc99m MDP intravenously into the patients arm as much 15.84 – 21.95 mCi. Furthermore, the anterior posterior planar imaging in whole of body at 4 hours after injection of the patient by using a gamma camera. Then, using region of interest (ROI), the accumulative of activity on bone can be measured. A range of values based on the activity of bone metastasis can be seen from the percentage uptake of lesions found on the spine  and  sternum.  Based  on  the  existence  of  lesions,  there  were  12  patients  had  lesions  in  the spine only, 9 patients had lesions in the sternum only, 7 patients had lesions on both of them and there are 16 patients who have not lesions in both. BERKALA FISIKA 2022-01-16 05:50:03 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/44187 BERKALA FISIKA; Vol 24, No 4 (2021): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/6180 2014-02-10T09:37:13Z berkala_fisika:RA

nmb a2200000Iu 4500 "131001 2013 eng " 1410-9662 dc PEMBUATAN KURVA ISODOSIS 2D DENGAN MENGGUNAKAN KURVA PERCENTAGE DEPTH DOSE (PDD) DAN PROFIL DOSIS DENGAN VARIASI KEDALAMAN UNTUK TREATMENT PLANNING SYSTEM Nurul Ihya, Farhatin Jurusan Fisika, Universitas Diponegoro, Semarang 50275 Anam, Choirul Jurusan Fisika, Universitas Diponegoro, Semarang 50275 Gunawan, Vincensius Jurusan Fisika, Universitas Diponegoro, Semarang 50275 Treatment Planning System (TPS) is very necessary in radiotherapy planning to give the accurate radiation dose given to the patient.  In the TPS, 2D isodose curve is used to determine thedose distribution with the same rate at a certain distance from the radiation source.  The isodosecurve is obtained from the Percentage Depth Dose (PDD) and dose profile.  Measurement data ofPDD and dose profiles obtained from Kensaras Hospital in Semarang.  The PDD and dose profiledata were obtained from testing the water phantom for soft tissues such as muscles or other bodytissues.  Dose profile curve which is used  is at a various depth, such as: 1.5 cm, 5 cm, 10 cm, 15cm, 20 cm and 25 cm with an area of 5 x 5 cm2field, 10 x 10 cm2, 15 x 15 cm2, 20 x 20 cm, 30 x 30cm2 and 40 x 40 cm2.  At each depth of curve profile, the dose at the surface is calculated  andnormalized using  interpolation and normalized by narrowing techniques. 2D isodose curveobtained from the weighting technique to the calculation of the dose profile curve. In the field sizeof 5 x 5 cm2 and 10 x 10 cm2, isodose curve formed better in the absence of horn at the edge of thecurve.  In the field size larger than 10 x 10 cm2 there are horns on the edge of the curve at thelower depths. Keywords : Treatment Planning System (TPS),  2D Isodose curve, Percentage Depth Dose (PDD),Dose profile. BERKALA FISIKA 2014-02-10 09:02:33 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/6180 BERKALA FISIKA; Vol 16, No 4 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3055 2012-04-07T12:44:51Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Efek Magnetooptis Pada Lapisan AgBr Terekspos Sulistyo, Respita Laboratorium Elektronika Optik dan Laser, Jurusan Fisika UNDIP Firdausi, K. Sofjan Laboratorium Elektronika Optik dan Laser, Jurusan Fisika UNDIP Marhaendrajaya, Indras Laboratorium Elektronika Optik dan Laser, Jurusan Fisika UNDIP The non linear optic characteristic from several transparent medium (film plate and glass) under influence of external magnetic field and variation of wavelengths, have been identified. In this experiment, the developed AgBr film is deposited on a hologram. The magnetic field has been produced by coils which connected to slide regulator (0-240V). The maximum value of magnetic field is about 182,0 mT. Light sources used are He-Ne Laser with a wavelength of 633 nm and 1 mW in power, and green laser pointer with a wavelength of 532 nm and power less than 5 mW. The optical characteristic measured in this experiment is the rotation of electric field, of the transmitted laser beam due to applied external magnetic field to the medium. The experiment result shows that  is dependent linearly on magnetic fields. The Verdet constant is proportional with wavelength of the light. Measured values for Verdet constant (V) at 632,8 nm is (0,487300,00070) min/G-cm and at 532 nm is (0,261700,00056) min/G-cm for glasses material and the values for Verdet constant at 632,8 nm is (0,328500,00060) min/G-cm  and at 532 nm is (0,156900,00039) min/G-cm for film plate.   Key words:Magnetooptical effect, non linear optic, Verdet constant BERKALA FISIKA 2012-04-06 10:17:20 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3055 BERKALA FISIKA; Vol 10, No 3 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2704 2012-03-29T15:32:53Z berkala_fisika:RA

nmb a2200000Iu 4500 "120328 2012 eng " 1410-9662 dc Investigasi Bidang Gelincir Tanah Longsor Menggunakan Metode Geolistrik Tahanan Jenis di Desa Kebarongan Kec. Kemranjen Kab. Banyumas Sugito, Sugito Program Studi Fisika Jurusan MIPA Fakultas Sains dan Teknik Unsoed, Jl. Dr. Soeparno No. 61 Karangwangkal Telp./Fax (0281) 638793 Purwokerto Irayani, Zaroh Program Studi Fisika Jurusan MIPA Fakultas Sains dan Teknik Unsoed, Jl. Dr. Soeparno No. 61 Karangwangkal Telp./Fax (0281) 638793 Purwokerto Permana Jati, Indra Program Studi Teknik Geologi Jurusan Teknik Fakultas Sains dan Teknik Unsoed Jl. Dr. Soeparno No. 61 Karangwangkal Telp./Fax (0281) 638793 Purwokerto Investigation of landslide slip surface using geoelectrical resistivity method has been conducted at Kebarongan Village, Kemranjen District, Banyumas Regency. Data acquisition by means Schlumberger and Wenner configuration.  Data processing and interpretation were using Progress version 3.0 and Res2Dinv version 3.54 softwares.  The output of Progress software were depth, number of layers, and values of rock resistivity.  Mean while the output of Res2Dinv were resistivity section, RMS, and depth of rock layers.  The interpretation result showed that at Kebarongan village lithology consist of four layers i.e. top soil, sandy clay, wet clay and sandy clay.  Slip surface is wet clay with depth of 10.31 until 14.21 m.  The slip surface orientation is same of slope area that is to south and the type of landslide is translational.      Keywords: geoelectrical resistivity, landslide, slip surface, Kebarongan BERKALA FISIKA 2012-03-28 21:38:25 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2704 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/54922 2023-06-01T04:13:32Z berkala_fisika:ART

nmb a2200000Iu 4500 "230601 2023 eng " 1410-9662 dc ANALISIS LAJU DOSIS KELUARAN PESAWAT SINAR-X FLUOROSKOPI DUAL FUNGSI DI RS WAHIDIN SUDIROHUSODO MAKASSAR Indah, Nur Hikmah Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Dewang, Syamsir Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Astuty, Sri Dewi Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia fluoroskopi, laju dosis ESD tipikal, laju dosis maksimum di udara, dan laju dosis permukaan Image Intensifier Penelitian  ini  bertujuan  untuk  menganalisis  kinerja  generator  tabung  pesawat  X-Ray Fluoroscopy  Dual  Function  Merk  APELEM  S.A  di  instalasi  radiologi  RSUP  Wahidin Sudirohusodo Makassar dalam aspek laju dosis ESD tipikal, laju dosis maksimum di udara dan laju dosis permukaan Image Intensifier. Analisis dilakukan berdasarkan indikator perubahan faktor eksposi dan pemilihan mode fungsi pesawat. Beberapa parameter yang menjadi variabel pendukung  adalah  uji  akurasi  tegangan,  uji  reproduksibilitas  keluaran  radiasi,  uji  linieritas kuat  arus  terhadap  keluaran  radiasi.  Hasil  yang  diperoleh  menunjukkan  pada  akurasi tegangan, nilai koefisien variasi (CV) tegangan 65, 75 dan 85 berturut-turut diperoleh 0,31%, 2,08% dan 2,21%. Uji reproduksibilitas menunjukkan hasil terhadap variasi tegangan sebesar 0,0048; terhadap variasi waktu eksposi sebesar 0,0314 dan terhadap variasi keluaran radiasi sebesar  0,0105.  Hasil  analisis  laju  dosis  pada  tiga  parameter  yaitu  laju  dosis  ESD  tipikal diperoleh nilai maksimum sebesar 0,0038 mGy/s, laju dosis maksimum di udara sebesar 0,1248 mGy/s  serta  laju  dosis  permukaan  Image  Intensifier  didapatkan  0,0219  µGy/s.  Semua parameter  yang  diuji  pada  pesawat  X-Ray  Fluoroscopy  Dual  Function  Merk  APELEM  S.A sesuai standar lolos uji yang ditetapkan dalam Perka BAPETEN No. 2 Tahun 2022, sehingga dapat disimpulkan pesawat dalam kondisi layak untuk digunakan secara rutin. BERKALA FISIKA 2023-06-01 04:13:31 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/54922 BERKALA FISIKA; Vol 26, No 1 (2023): Berkala Fisika eng Copyright (c) 2023 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/7387 2014-09-24T09:08:58Z berkala_fisika:RA

nmb a2200000Iu 4500 "140401 2014 eng " 1410-9662 dc STUDI KOROSIVITAS DAN MORFOLOGI PERMUKAAN BAJA KARBON API 5L GR-B YANG DILAPISI POLIMER HIBRID PADA LINGKUNGAN AIR LAUT DAN GAS H2S PADA KONDISI JENUH CO2 Setiawidiani, Dinar Jurusan Fisika, FMIPA, Universitas Padjadjaran Jl. Raya Bandung-Sumedang Km.21 Jatinagor 45363, Sumedang, Jawa Barat. Susilawati, Tuti Jurusan Fisika, FMIPA, Universitas Padjadjaran Jl. Raya Bandung-Sumedang Km.21 Jatinagor 45363, Sumedang, Jawa Barat. Suryaningsih, Sri Jurusan Fisika, FMIPA, Universitas Padjadjaran Jl. Raya Bandung-Sumedang Km.21 Jatinagor 45363, Sumedang, Jawa Barat. Harjo, Hardoyo Jurusan Fisika, FMIPA, Universitas Padjadjaran Jl. Raya Bandung-Sumedang Km.21 Jatinagor 45363, Sumedang, Jawa Barat. It has been tested with the corrosion protection of carbon steel using hybrid inorganic - organic polymer. Hybrid polymer precursor materials is synthesized from monomers poly (TMSPMA) using sol- gel technique. The hybrid polymer precursors coated on the surface of carbon steel API 5L GR - B, and then thermally polymerized. Corrosion test conducted in a seawater environment, H2S, CO2 saturation using potentiodynamic polarization method and morphological examination using a Scanning Electron Microscope. The obtained results shows the corrosion rate of carbon steel without coating in critical condition was 1.643 mm/year. Once the hybrid polymer coated carbon steel with a corrosion rate becomes 0.903 mm/year. The corrosion rate was reduced to 0.74 mm/year. Corrosion rate is related to the protection efficiency of 45.05%. These results are supported by data that shows the surface morphology uneven corrosion on carbon steel surface after coated with polymer hybrid. Keywords : corrosion , carbon steel , polymer hybrid , potentiodynamic polarization BERKALA FISIKA 2014-09-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/7387 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 2 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3071 2012-04-07T08:51:30Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Analisis Fenomena Elektrohidrodinamik pada Permukaan Minyak Silikon Menggunakan Plasma Lucutan Pijar Korona Positif Rahayu, Sri Jurusan Fisika FMIPA UNDIP, Semarang Azam, M. Jurusan Fisika FMIPA UNDIP, Semarang Triadyaksa, Pandji Jurusan Fisika FMIPA UNDIP, Semarang Nur, Muhammad Jurusan Fisika FMIPA UNDIP, Semarang The aim of this research is analysis electrohydrodynamic phenomenon deformation of oil silicon surface by technology of positive corona glow discharge plasma which generated by plasma generator system with point-to-plane electrodes geometry configuration. Variation of voltage and distance between electrodes had been treated to surface of silicon oil. Electrohydrodynamic phenomenon deformation in this research is caused by polarization and ion wind. Ionic wind would be happened if applied voltage over the corona threshold that was 2.6 kV. Graph current of saturation corona unipolar for variation voltage, being formed semi-parabolic equation while the variation of distance between electrodes, being formed linear equation. The hole diameter at variation voltage was influenced by electrics field intensity and momen dipole strength. The hole diameter at variation of distance between electrode was influenced by parabolic angle of electrics line field. The oil velocity for back to initial position is different. Velocity would be go down if the voltage progressively go up and velocity would be go up if the distance between electrode progressively go up. BERKALA FISIKA 2012-04-06 10:17:48 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3071 BERKALA FISIKA; Vol 10, No 1 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2810 2012-03-29T12:05:10Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc STUDI PEMANFAATAN ENERGI MATAHARI SEBAGAI PEMANAS AIR Sidopekso, Satwiko Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Jakarta (UNJ) Jl. Pemuda No. 10, Rawamangun, Jakarta 13220 Using the principle of a box in a black body  covered  with glass crystal, Energy from the sun light which was emit thermal radiation energy of 1000 Watt/m2 at the day light under  Standard Test Condition (STC), the head from the sun light will be speared in the box. Water from the storage tank will circulate without using a booster pump according to the principle thermoshipon to pass through the head collector pipes made of copper in a closed circulation and returned to the water storage tank. With water heating system is expected to have hot water with temperatures above 60o Celsius during the day.   Key word : Solar Energy ; Head Collector; Thermoshipon. BERKALA FISIKA 2012-03-29 06:14:46 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2810 BERKALA FISIKA; Vol 14, No 1 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/70087 2025-01-08T12:55:50Z berkala_fisika:ART

nmb a2200000Iu 4500 "240717 2024 eng " 1410-9662 dc KOMPARASI DOSIS KELUARAN BERKAS FOTON DAN BERKAS ELEKTRON PADA PESAWAT LINEAR ACCELERATOR VARIAN TRUE BEAM TERHADAP WATER PHANTOM Sulistiana, Sulistiana Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin Dewang, Syamsir Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin Astuty, Sri Dewi Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin Saleha, Saleha Instalasi Radioterapi Rumah Sakit TK.II Pelamonia Makassar, Indonesia Linear Accelerator (Linac), Sinar-X, Technical Report Series (TRS) 398 Metode radioterapi merupakan salah satu pilihan pengobatan dalam mengatasi penyakit kanker. Peralatan radioterapi yang digunakan untuk pengobatan kanker adalah Linear Accelerator. Linac bekerja dengan memanfaatkan gelombang elektromagnetik frekuensi tinggi untuk mempercepat partikel bermuatan, menghasilkan radiasi berupa berkas foton dan elektron. Penelitian ini bertujuan mengevaluasi kondisi Linac selama penggunaannya, agar tetap sesuai dengan rentang deviasi yang ditetapkan oleh Protokol TRS 398. Data penelitian diperoleh melalui analisis ionisasi chamber, suhu, tekanan, efek polaritas, dan rekombinasi ion. Pengujian dilakukan dengan menggunakan berkas foton pada energi 6 MV, 10 MV, dan 6 FFF, serta berkas elektron dengan energi 6 MeV, 9 MeV, dan 12 MeV. Parameter lain yang diterapkan meliputi luas lapangan 10 cm × 10 cm dan jarak Source to Surface Distance (SSD) sebesar 100 cm. Hasil analisis menunjukkan berkas energi 6 MV didapatakan nilai deviasi 1, 47 %, energi 10 MV  1,52 % , dan untuk energi 6 FFF didapatkan nilai deviasi 1,39 %. Pada berkas elektron energi 6 MeV didapatkan nilai dengan deviasi 1,28 %, pada energi 9 MeV didapatkan nilai dengan deviasi 1,39 %, dan pada berkas elektron energi 12 MeV didapatkan nilai dengan deviasi 1,97 %. Berdasarkan hasil tersebut, keluaran berkas radiasi sinar-X pada pesawat linear accelerator di Rumah Sakit TK.II Pelamonia Makassar telah memenuhi standar Technical Report Series 398 IAEA, dengan rentang deviasi pengukuran yang masih berada dalam batas toleransi ±2%. BERKALA FISIKA 2025-01-08 09:35:44 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/70087 BERKALA FISIKA; Vol 27, No 2 (2024): Berkala Fisika eng Copyright (c) 2025 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/9383 2015-11-05T08:35:59Z berkala_fisika:RA

nmb a2200000Iu 4500 "150102 2015 eng " 1410-9662 dc STUDI PROBABILITAS GEMPA DAN PERBANDINGAN ATENUASI PERCEPATAN TANAH METODE JOYNER DAN BOORE (1988), CROUSE (1991) DAN SADIGH (1997) DI SEKITAR WILAYAH BANDA ACEH DAN BENGKULU Palupi, Indriati Retno Program Studi Teknik Geofisika, Fakultas Teknologi Mineral, Universitas Pembangunan Nasional “Veteran” Yogyakarta Jln. SWK 104 Condong Catur Sleman Yogyakarta Raharjo, Wiji Program Studi Teknik Geofisika, Fakultas Teknologi Mineral, Universitas Pembangunan Nasional “Veteran” Yogyakarta Jln. SWK 104 Condong Catur Sleman Yogyakarta Santoso, Agus Program Studi Teknik Geofisika, Fakultas Teknologi Mineral, Universitas Pembangunan Nasional “Veteran” Yogyakarta Jln. SWK 104 Condong Catur Sleman Yogyakarta PSHA, acceleration, Joyner & Boore (19988), Crouse (1991) and Sadigh (1997) method Sumatera is one island in Indonesia which is located near subduction zone. It is prone of earthquake, but the level of prone is not same in each province on its, like in Banda Aceh and Bengkulu. Both of them are the site of this research. Probability is one way to know characteristic or earthquake distribution on both of the site. Earthquake distribution in  Aceh is more convergence than Bengkulu. It means that earthquake’s number in Aceh is more than in Bengkulu. It is done for fault source and area source of earthquake. Ground motion because of earthquake can display by acceleration and attenuation curve. It can be calculated by Joyner & Boore (1988), Crouse (1991) and Sadigh (1997) method. Keywords: PSHA, acceleration, Joyner & Boore (19988), Crouse (1991) and Sadigh (1997) method BERKALA FISIKA 2015-11-05 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/9383 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 1 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3088 2012-04-07T12:36:50Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Respon Non Linier Sifat Optis Larutan MgSO4 Firdausi, K. Sofjan Jurusan Fisika, FMIPA UNDIP, SemarangMu Azam, Much. Jurusan Fisika, FMIPA UNDIP, Semarang Romadhona, Thithit Jurusan Fisika, FMIPA UNDIP, Semarang Abadi, Prayitno Jurusan Fisika, FMIPA UNDIP, Semarang A response of nonlinear optic of several salt solutions in external magnetic field has been studied. An altered magnetic field varies from 0 until 0,2T used to induce samples, and then change of polarization angle b is measured by polarizators, where the direction propagation of laser is perpendicular to the direction of B. Various concentration of solution is used at 5% until 35%. Our experiment shows that the graphs of b vs. B are still linear for mineral water and NaCl solution. However, for MgSO4 solution, we obtained polynomial tendency of this graph. At 20% until 35% of concentration of this solution it has polynomial in third order. Keywords: Nonlinear optics, change of polarization angle, external magnetic field. BERKALA FISIKA 2012-04-06 10:20:34 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3088 BERKALA FISIKA; Vol 9, No 3 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2873 2012-03-29T14:25:06Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Kajian Spektrum Sinar-X 6 MV Menggunakan Simulasi Monte Carlo Anam, Choirul Laboratorium Fisika Medis, Jurusan Fisika, Fakultas MIPA, Universitas Diponegoro Semarang X-ray spectra produced by Elekta Linac for 6 MV beam  have been evaluated using Monte Carlo simulation. In this simulation, Linac head was modeled using BEAMnrc code. X-ray sepctra, fluence vs position, and energy fluence vs position were determined using BEAMDP code. In this simulation, the SSD (source skin distance) was 90 cm and the field size of radiation was 10 x 10 cm2. Energy electrons arriving at the target (incident electron) was varied 5.7 MeV, 6.0 MeV, 6.3 MeV and 6.6 MeV. As for the radial intensity, FWHM values ​​varied 1.0 mm, namely 0.5 mm, 1.0 mm, 1.5 mm and 2.0 mm. X-ray spectra were determined at the surface of the phantom. Iit was found that the curve 6 MV X-ray spectra has a shape not symmetry with an average energy of about 2 MeV. In the spectra there is no energy X-ray radiation value exceeds the kinetic energy of incident electrons. X-ray spectra is not affected by the width of electron beam striking on the target. if the electron energy increases, it will generate increased fluence and energy fluence, but no effect on the penumbra region (the edge of field size). If the electron beam width increases, it will result in the radiation field edge becomes less sharp or penumbra widening. Keywords — Monte Carlo Simulation, X-ray spectra, Linear Accelerator BERKALA FISIKA 2012-03-29 11:12:16 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2873 BERKALA FISIKA; Vol 14, No 2 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/12801 2016-12-16T09:42:20Z berkala_fisika:RA

nmb a2200000Iu 4500 "151001 2015 eng " 1410-9662 dc SINTESIS LAPISAN TIPIS SENG OKSIDA DIDOPING PERAK (ZnO:Ag) DAN APLIKASINYA UNTUK PENDEGRADASI POLUTAN ORGANIK AIR Sutanto, Heri Jurusan Fisika, Universitas Diponegoro, Semarang Nurhasanah, Iis Jurusan Fisika, Universitas Diponegoro, Semarang Hidayanto, Eko Jurusan Fisika, Universitas Diponegoro, Semarang Semiconductor, photo-catalyst, ZnO, doping Ag, micro-structure, photo-degradation Zinc Oxide (ZnO) is a semiconductor material that is used for photo-catalyst to degrade organic pollutants. The addition of doping silver (Ag) in ZnO can increase the photo-catalytic activity in the degradation process. In this study, the addition of doping Ag in ZnO thin film on a glass substrate deposition using thermal spray coating method has influence on the micro-structure and photo-degradation in presence of bacteria Escherichia coli (E. coli) as an organic pollutants has been investigated. Micro-structure of ZnO : Ag layer were characterized by Scanning Electron Microscopy (SEM) and photo-degradation activities of bacteria were tested with Total Plate Counter (TPC). The results show that doping Ag in ZnO give affect the topography of the surface that can increase in amount of grains and grain size in order to increase the photo-catalytic activity. It indicated by decrease in amount of E. coli bacteria from the initial sample with percentage of degradation is 99,99951% Keywords: Semiconductor, photo-catalyst, ZnO, doping Ag, micro-structure, photo-degradation BERKALA FISIKA 2016-12-16 09:09:59 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/12801 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 4 Tahun 2015 eng Copyright (c) 2016 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/3104 2012-04-07T12:41:37Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc PEMODELAN TOMOGRAFI CROSS-HOLE METODE GEOLISTRIK RESISTIVITAS (Bentuk Anomali Silindris) Prabowo, Riza Eka Laboratorium Geofisika FMIPA Undip Yulianto, Gatot Laboratorium Geofisika FMIPA Undip Nurwidyanto, M. Irham Laboratorium Geofisika FMIPA Undip             Cross-hole method using an amount of electrode were placed downhole is one of tomography method. Cross-hole tomography method delineate the geological conditions of the earth surface therefore it takes an important rule in the case of anomaly monitoring. The buis concrete planted in subsurface with deepness of about 1 m were used as the source of anomaly. Tomography cross-hole data with configuration such as pole-pole, pole-bipole, bipole-pole and bipole-bipole array were taken with the depth of the borehole is 1,2 m. The space variation of one electrode to another in the hole of drill is 0,2 m, 0,4 m, 0,6 m and 0,8 m for the configuration of pole-bipole, bipole-pole and bipole-bipole. Res2Dinv program obtained the images of bipole-bipole better than the images of other configuration. While the pole-pole configuration had the worst images compared to others. It is caused by two remote electrode of pole-pole array while bipole-bipole array do not have ones. Key words: cross-hole, tomography, borehole, remote electrode BERKALA FISIKA 2012-04-06 10:20:14 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3104 BERKALA FISIKA; Vol 9, No 1 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2926 2012-03-30T13:57:00Z berkala_fisika:EDT

nmb a2200000Iu 4500 1410-9662 dc Cover Oktober 2009 Oktober 2009, Cover Jurusan Fisika FMIPA Universitas Diponegoro Cover Berkala Fisika Oktober 2009 BERKALA FISIKA 2012-03-29 14:54:02 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2926 BERKALA FISIKA; Vol 12, No 4 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/23881 2019-06-25T14:40:01Z berkala_fisika:RA

nmb a2200000Iu 4500 "190624 2019 eng " 1410-9662 dc SISTEM SENSOR NIRKABEL UNTUK MONITORING EFISIENSI PANEL SURYA Pakradiga, Ahlan Laboratorium Instrumentasi dan Elektronika, Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Suryono, Suryono Laboratorium Instrumentasi dan Elektronika, Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang solar panel, monitoring system, remotely, sensor, efficiency of solar panels Solar panels are devices consist of several solar cells that convert light into electrical energy. In order to work optimally, a monitoring system to electrical current, voltage, and light intensity in solar cells is needed. The monitoring system can be wirelessly carried out, so that solar panels can be remotely monitored without having to go to the field. The solar panel monitoring system used a wireless sensor system that uses sensors, System on Chip (SoC) WiFi Microcontroller, and computers. The sensors used were ACS712 current sensor, voltage sensor, and BH1750 light intensity sensor module. Before it was used, the current sensor and voltage sensor should be characterized and calibrated. Data stored in the database can be processed to calculate savings on solar panels in real time using php programming, then it was transferred to the web. The characterization equation for the current sensor is y = 944.9x + 13597.0, the average error for calibrating the current sensor is 3.39%. The characterization equation for the voltage sensor is y = 471.2x – 206.2 and the average error for the voltage sensor calibration is 0.77%. Sensor calibration is obtained by an average error of 1.10%. The efficiency of solar panels at bright times is 12.49%. In this study, it has been found that the efficiency of solar panels is influenced by the intensity of sunlight. Keywords: solar panel, monitoring system, remotely, sensor, efficiency of solar panels BERKALA FISIKA 2019-06-24 11:44:36 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/23881 BERKALA FISIKA; Vol 22, No 2 (2019): Berkala Fisika Vol. 22 No. 2 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4982 2013-05-27T14:18:20Z berkala_fisika:RA

nmb a2200000Iu 4500 "120401 2012 eng " 1410-9662 dc SIMULASI MONTE CARLO UNTUK MENENTUKAN DOSIS SINAR-X 6 MV PADA KETAKHOMOGENAN MEDIUM JARINGAN TUBUH Rizani, Alfian Instalasi Radioterapi RSUD Ulin Banjarmasin Setiabudi, Wahyu Jurusan Fisika Universitas Diponegoro Semarang Anam, Choirul Jurusan Fisika Universitas Diponegoro Semarang Study on dose distribution of human body at 6 MV X-ray beam has been done using Monte Carlo Simulation. This study is aimed to define dose distribution of soft tissues, lungs andbones also corrections factor due to tissue inhomogeneity. The study was conducted by Monte Carlo Simulation using EGSnrc software, i.e.BEAMnrc and DOSXYZnrc. The linear accelerator head was simulated by BEAMnrc  with SSD100 cm and field size 10 x 10 cm . The calculating of radiation dose distribution at homogen andnonhomogen phantom that have size 40 x 40 x 40 cm in tissues of human body, such as softtissues, lungs and bones were made by using DOSXYZnrc. Nonhomogen phantom of human bodywas made by insert lungs or bones with thickness 10 cm in soft tissues at depth of 5 cm – 14 cm. It is obtained that the dose distribution of soft tissue and water phantom have samecharacteristic which both of them have maximum dose (D ) at depth of 1,5 cm. Inserting of lungswith a thickness of 10 cm in soft tissue results to the increasing of dose until 12,2 % and insertingof bones with the same thickness with lungs results to decreasing of dose until 10,3 %. The rangeof correction factor due to inserting lungs is 1,00–1,27 and for bone is 0,81–1,05. Keywords:Monte Carlo Simulation, PDD (Percentage Depth Dose), corrections factor BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4982 BERKALA FISIKA; Vol 15, No 2 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2974 2012-04-03T11:49:51Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Analisis Sudut Kemiringan Lempeng Subduksi di Selatan Jawa Tengah dan Jawa Timur Berdasarkan Anomali Gravitasi dan Implikasi Tektonik Vulkanik Dwi Indriana, Rina Jurusan Fisika, Universitas Diponegoro Semarang Gravitation anomaly research had been done to predict the subduction dip and model. The gravitation research covered East and Central Java, Indonesia. Upward continuation used for regional anomaly mapping. Two dimension modeling from each cross-sectional used grav2poly or grav2dc. From 2D model subduction dip was calculated. The research result were subduction dip various between 3,40 to 8,20. There is a suggestion that low magnitude of dip correlated with volcano activity and high magnitude of dip correlated with some depresstion zone. Key word: subduction zone, subduction dip, gravitation modeling BERKALA FISIKA 2012-03-30 15:00:48 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2974 BERKALA FISIKA; Vol 11, No 3 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/4993 2013-05-27T16:00:23Z berkala_fisika:RA

nmb a2200000Iu 4500 "121001 2012 eng " 1410-9662 dc STUDI AWAL DAMPAK PERUBAHAN IKLIM BERBASIS ANALISIS VARIABILITAS CO2 DAN CURAH HUJAN (Studi Kasus; Semarang Jawa Tengah) Gernowo, Rahmat Jurusan Fisika, Universitas Diponegoro Adi, Kusworo Jurusan Fisika, Universitas Diponegoro Arifin, Zaenal Jurusan Fisika, Universitas Diponegoro Impacts of climate change marked by the increasing emissions of CO2 in the air and increased precipitation make various parties began to feel the need to measure the gas content on a regular basis.These gases gradually accumulating in Earth's atmospheric layers. However, the desire was constrainedby a number of issues which then affect the accuracy of the continuous mapping circulating gas in theatmosphere. Researchers speculate that the amount of CO2 and other gases is growing each day due tothe many additional human-produced carbon emissions from burning fossil fuels. The results obtained bythe pattern of variability in Semarang rising CO2 and rising precipitation trends show an indication ofclimate change has occurred. It was proven occurrence of climate anomalies and the previous year. Keywords: CO2 variability, Rainfall Semarang BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4993 BERKALA FISIKA; Vol 15, No 4 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2993 2012-04-03T15:26:37Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Simulasi Penelusuran Berkas Cahaya pada Lensa Tipis Edi Wibowo, Catur Jurusan Fisika, FMIPA, Universitas Diponegoro A program to simulated trace the beam of light have been done with Python programming language version 4.2. Program was simulated trace the beam of light in the convergen lens and divergen lens. Program was constuct by functions of canvas, create line, button and motion  in object oriented programming Python. Object simulation is the convergen lens and divergen lens with focus 10 cm and hight of object 4 cm.The result of simulation is graphical user interface with mouse interaction. The trace of beam of light indicate that this simulation is according to theory. BERKALA FISIKA 2012-04-03 11:53:14 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2993 BERKALA FISIKA; Vol 11, No 1 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/34359 2020-11-22T18:12:16Z berkala_fisika:ART

nmb a2200000Iu 4500 "200731 2020 eng " 1410-9662 dc SISTEM PENYIRAM TANAMAN CABAI OTOMATIS UNTUK MENJAGA KELEMBABAN TANAH BERBASIS ESP8266 Priyono, Andi Program Studi D3 Instrumentasi dan Elektronika, Sekolah Vokasi, Universitas Diponegoro, Semarang Triadyaksa, Pandji Departemen Fisika Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang The process of planting certain plants requires extra attention, especially in maintaining soil moisture such as in chili plants. Therefore, this research develops an automatic plant watering system that can be monitored via a smartphone using the Telegram application. This system can  do  automatic  watering  according  to  soil  moisture  and  measures  the  temperature  and humidity of the surrounding environment controlled by ESP8266 which is equipped with 16x2 LCD,  YL-69  sensor,  and  DHT11  sensor.  Watering  system  trials  show  excellent  readability comparable  to  calibrators.  Temperature,  humidity,  and  soil  moisture  are  informed  via  a smartphone and LCD that are attached to the watering prototype. The Telegram application is able to send information to carry out the function of watering automation when the soil moisture is less than 50% as a reference in accordance with the characteristics of the chili plants. In addition, the automatic sprinkler trial via the Telegram command, as desired by the user, was also successfully carried out. It is concluded that development of a plant watering system based on soil moisture information has been successfully carried out. The system shows the ability of the Telegram application to provide remote commands to the system that works. Keywords:  Automatic  plant  watering  system,  ESP8266,  Sensor  YL-69,  Sensor  DHT11,  Chili  plants, Telegram BERKALA FISIKA 2020-11-22 17:41:26 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/34359 BERKALA FISIKA; Vol 23, No 3 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5009 2013-05-27T16:22:39Z berkala_fisika:RA

nmb a2200000Iu 4500 "120701 2012 eng " 1410-9662 dc INVERSI LINIER LEASTSQUARE DENGAN MATLAB ( Studi Kasus Model Gravitasi Bola Berlapis) Nurwidyanto, Irham Jurusan Fisika Universitas Diponegoro Semarang Setiawan, Ari Jurusan Fisika Universitas Gadjah Mada Yogyakarta The linear  least square Inversion have been made with matlab8 for a case study of layered ball with the aim to study the response of the gravitational field of a layered ball. The gravitational field of layered ball formulation described later the value  is calculated by programming in matlab. As the validation data is computed on the surface of the earth'sgravitational field with a case of six layers with different density and radius. The value aresuitable  to the real slate. After the results are appropriate, the results of  programming was made is used to calculate the gravitation field  of another layered ball object, the data is then used assynthetic data (considered as a data field) which is an inversion of input data on the program aremade. The results obtained in this modeling can be concluded that there are ambiguity from theinversion results, which means that the parameters which be obtained from the invertion methodare  very different to the riil parameter if not given early predictive value as the limit of theexpected value. By providing a limit value (the value of the initial estimate) the expected results ofthe inverse can provide results that correspond (nearly) true value. Key words: Inversion, Linier leastquare, layered ball BERKALA FISIKA 2013-05-27 13:55:05 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5009 BERKALA FISIKA; Vol 14, No 3 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3032 2012-04-05T15:03:10Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Penentuan Gaya Tolak Menolak Magnet Antar Dua Magnet Permanet Menggunakan Metode Kesetimbangan Benda Asih Nugroho, Kuncoro Jurusan Pendidikan Fisika, FMIPA, Universitas Negeri Yogyakarta Use of magnets vary in life. Use of magnets depending on needs. Magnets can be used from the side: the field is generated, attractive force and repel force between the two magnets. Special utilizing repel forces magnetic one used on the railways to reduce the friction between wheel and rail.One way to determine the amount of repel force magnet is to use the object equilibrium. Two similar magnetic poles will repel. Large repulsion force depends on magnetic field (B) accrued and distance (r) the two magnets. Two magnets with similar poles are placed in the shell will give rise to vertical distance between the magnets to each other.  There is a balance between the repulsive magnetic force with the gravity due to the mass of the magnet when the magnet above the rest. Magnetic repulsive force can be determined for certain r by changing the magnetic mass. Large magnetic gravity on each r can be computed from the gravity due to the magnetic mass.   Keywords: repel force, gravity BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3032 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/44182 2022-01-16T05:28:56Z berkala_fisika:ART

nmb a2200000Iu 4500 "220116 2022 eng " 1410-9662 dc DETERMINATION OF THICKNESS AND OPTICAL BAND GAP OF POLYANILINE NANOFIBERS Ketut Umiati, Ngurah Ayu Departemen Fisika, Universitas Diponegoro Semarang Setiawati, Evi Departemen Fisika, Universitas Diponegoro Semarang Facta, Mochammad Departemen Teknik Elektro, Universitas Diponegoro Semarang polyaniline nanofiber, optical band gap, thickness The study observed the thickness and optical band gap of polyaniline nanofiber (PNF). PNF in this study is synthesized by the interfacial polymerization method in Toluene Aniline 0.31 with the APS 4mmol dopant HCl solution with molarity between 1 M to 3 M. The synthesis results obtained were characterized by UV-Vis scanning spectrophotometer. The thickness and absorption coefficient (α) is observed by Swanepoel method and Beer–lambert’s relation, respectively. The optical band gap is observed from extrapolation versus  . The results of this study indicate that the molarity of dopants affect the thickness layer and optical band gap of the material. BERKALA FISIKA 2022-01-16 05:28:56 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/44182 BERKALA FISIKA; Vol 24, No 3 (2021): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5264 2013-08-01T09:44:55Z berkala_fisika:EDT

nmb a2200000Iu 4500 "130701 2013 eng " 1410-9662 dc Berkala Fisika Vol. 16 No. 3 2013 Berkala Fisika, Tim Redaksi Jurusan Fisika Fakultas Sains dan Matematika Universitas Diponegoro Semarang Berkala Fisika Vol. 16 No. 3 2013 BERKALA FISIKA 2013-08-01 09:11:11 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5264 BERKALA FISIKA; Vol 16, No 3 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3050 2012-04-06T20:08:51Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Studi Interferometer Fabry-Perot Untuk Pengukuran Panjang Gelombang Cahaya Satoto, Dwi Laboratorium Optoelektronik & Laser, Jurusan Fisika, FMIPA UNDIP Sugito, Heri Laboratorium Optoelektronik & Laser, Jurusan Fisika, FMIPA UNDIP Firdausi, K. Sofjan Laboratorium Optoelektronik & Laser, Jurusan Fisika, FMIPA UNDIP In this experiment, an interferometer Fabry-Perot method has been used to measure wavelength of diode laser. The first step is to calibrate the micrometer displacement using He-Ne laser in order to measure the diode and He-Ne wavelength. By shifting movable mirror, the transition of interference fringe in counted against the displacement of movable mirror. For the result of measurement, it is obtained for the wavelength of the red diode laser of, and green diode laser of.   Key word: Interferometer Fabry Perot, multiple beam interference. BERKALA FISIKA 2012-04-06 10:17:07 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3050 BERKALA FISIKA; Vol 10, No 4 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2455 2012-03-29T14:43:26Z berkala_fisika:RA

nmb a2200000Iu 4500 "120319 2012 eng " 1410-9662 dc Studi Sifat Termal Prekursor In(TMHD)3 Untuk Menumbuhkan Lapisan Tipis In2O3 dengan Teknik MOCVD Saragih, Horasdia 1 Kelompok Keahlian Fisika Material Elektronik, FMIPA, Institut Teknologi Bandung Jln. Ganesa No. 10 Bandung 40132, INDONESIA 2 Fakultas Teknik Informatika, Universitas Advent Indonesia Jln. Kolonel Masturi No. 288, Parongpong, Bandung 40067, INDONESIA Hasniah, Hasniah Kelompok Keahlian Fisika Material Elektronik, FMIPA, Institut Teknologi Bandung Jln. Ganesa No. 10 Bandung 40132, INDONESIA Sustini, Euis Kelompok Keahlian Fisika Material Elektronik, FMIPA, Institut Teknologi Bandung Jln. Ganesa No. 10 Bandung 40132, INDONESIA Sukirno, Sukirno Kelompok Keahlian Fisika Material Elektronik, FMIPA, Institut Teknologi Bandung Jln. Ganesa No. 10 Bandung 40132, INDONESIA The In2O3 thin films have been deposited on quartz substrate by MOCVD technique using In(TMHD)3 as a metal organic precurcor. Thermal properties of In(TMHD)3 material have been investigated by analyses of TG-DTA curve and FTIR spectrum to determine the value of In2O3 deposition parameters. Based on TG-DTA curve and FTIR spectrum analyses, we find that: (1) melting point of In(TMHD)3 powder is 175oC; (2) In(TMHD)3 powder starts to evaporate at 184oC; (3) partial oxidation of In(TMHD)3 in Ar/atmosfer accur at 260oC; and (4) dissosiation of TMHD ligand from indium metal element happened in the temperature range 300oC – 400oC. According to these results, we maintaned growth condition for deposition of In2O3: the temperature of In(TMHD)3 bubbler (Tb) = 200oC; the pressure of In(TMHD)3 bubbler (Pb) = 260 Torr; the rate of argon gas flow to carried out the vapor of In(TMHD)3 = 50 sccm; the rate of oxygen gas = 50 sccm; and temperature of substrate = 300oC. In 120 minutes, the thickness of deposited In2O3 thin films, the rate of deposition, and the roughness of film surface are about 0.2 µm, 1.6x10-3 µm/menit and 70 nm, respectively.   Keywords: In(TMHD)3 precursor, In­2O3, thin films, thermal properties, MOCVD. BERKALA FISIKA 2010-10-22 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2455 BERKALA FISIKA; Vol 13, No 1 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/50740 2022-12-06T10:03:02Z berkala_fisika:ART

nmb a2200000Iu 4500 "221206 2022 eng " 1410-9662 dc SISTEM PEMANTAU INTENSITAS CAHAYA AMBIEN DENGAN SENSOR BH1750 BERBASIS MIKROKONTROLER ARDUINO NANO Khuriati, Ainie Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Arduino nano, Delphi7, pencahayaan, sensor BH1750. Pencahayaan adalah salah faktor penentu kualitas udara dalam ruang kerja.  Parameter ini berkaitan dengan kenyamanan dan kesehatan penghuninya, sehingga perlu upaya untuk melakukan pemantauan secara berkesinambungan. Sensor BH1750 adalah sensor cahaya mampu mengukur intensitas cahaya dalam range  1 – 65535 lux.  Untuk membangun sebuah sistem pemantau, cukup hanya menghubungkan sensor ini dengan mikrokontroler Arduino nano melalui protokol I2C. Antarmuka Borland Delphi7 dibuat untuk memudahkan dalam pengukuran dan penyimpanan data hasil pengukuran. Data pengujian menunjukkan bahwa pendekatan linier pada pengujian karakteristik secara vertikal dapat diterapkan pada sensor karena , lebih besar dari 0,67. Sedangkan pengujian karakteristik sensor cahaya BH1750 secara horizontal menunjukkan kemiripan bentuk grafik dari lembar data.  Hal ini menunjukkan bahwa alat ini memberikan hasil pengukuran yang cukup akurat. BERKALA FISIKA 2022-12-06 10:03:02 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/50740 BERKALA FISIKA; Vol 25, No 3 (2022): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/6582 2014-03-21T15:18:56Z berkala_fisika:EDT

nmb a2200000Iu 4500 "140101 2014 eng " 1410-9662 dc Petunjuk Penulisan Berkala Fisika Hidayanto, Eko Jurusan Fisika, Universitas Diponegoro Semarang Vol 17 No.1 2014 BERKALA FISIKA 2014-03-21 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/6582 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 1 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3066 2012-04-07T08:46:56Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc ANALISIS FENOMENA ELECTROHYDRODYNAMIC PADA PERMUKAAN MINYAK SILIKON (CAIRAN DIELEKTRIK) MENGGUNAKAN SISTEM PEMBANGKIT PLASMA LUCUTAN PIJAR KORONA NEGATIF DENGAN ELEKTRODA BERKONFIGURASI TITIK BIDANG Nur, Muhammad Laboratorium Fisika Atom & Nuklir, Jurusan Fisika Fakultas MIPA UNDIP Anam, Choirul Laboratorium Fisika Atom & Nuklir, Jurusan Fisika Fakultas MIPA UNDIP Arisa, Betri Laboratorium Fisika Atom & Nuklir, Jurusan Fisika Fakultas MIPA UNDIP An analysis of Electrohydrodynamic (EHD) phenomenon deformation of oil silicon surface has been done.The negative corona glow discharge plasma in this research is generated by plasma generator system in point to plane electrodes configuration. The first step of experiment is to determine correlation of voltage and electric current, and correlation of distance between electrode and electric current. Then, the second is to determine correlation of voltage and hole radius of oil silicon surface, and corelation of distance between electrode and hole radius of oil silicon surface. Finally, it is to determine  the velocity hole for back to initial position of oil silicon surface after turn off electric field. The EHD phenomenon of oil silicon can be generated by impose of non homogeneous high electrics field. The voltage of corona at distance between electrodes 1 cm, 1,5 cm and  2 cm are 2,6 kV-4 kV,  3,4 kV-5,2 kV, and  3,8 kV-6,0 kV respectively. The increase of electrics field intensity influence dipole moment strength, it increases the radius of the hole of oil silicon surface. The increase of distance between electrode influence parabolic angle of electrics line field then cause the increase of hole radius. After this, if the electric field is zero with  increasing voltage, velocity hole of  oil silicon for back to initial position  slower then if the increasing of h, that makes the velocity hole for back to initial position faster.   Key words: Electrohydrodynamic, Silicon Oil, Dielectric polarization, Positive corona glow discharge plasma, ionic wind. BERKALA FISIKA 2012-04-06 10:17:27 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3066 BERKALA FISIKA; Vol 10, No 2 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2788 2012-03-29T12:52:59Z berkala_fisika:RA

nmb a2200000Iu 4500 "120329 2012 eng " 1410-9662 dc Studi Awal Pemodelan Perlakuan Virotherapy yang Menggunakan Virus Campak pada Tumor Paru-paru Tikus Kartono, Agus Laboratorium Fisika Komputasi Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor, Jalan Meranti, Gedung Wing S, Lantai 2, Kampus IPB Darmaga, Bogor 16680 Sunjono, Sunjono Laboratorium Fisika Komputasi Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor, Jalan Meranti, Gedung Wing S, Lantai 2, Kampus IPB Darmaga, Bogor 16680 Arif, Ardian Laboratorium Fisika Komputasi Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor, Jalan Meranti, Gedung Wing S, Lantai 2, Kampus IPB Darmaga, Bogor 16680 The interaction model dynamics between tumor and viruses based on the interaction phenomenon between the three populations, namely: population of uninfected tumor cells, tumor cell population infected with the virus and the virus population. This study aimed to see the interaction between non-infected tumor cells, tumor cells infected with viruses and viruses, so it can be modeled using virotherapy treatment of measles virus in mouse lung tumors. Model parameters obtained from experimental data. Numerical Solution of the models suggest that the dose of the virus play an important role in determining the outcome of tumor therapy. Tumor growth can be slowed by using this virotherapy, but the tumor can not be killed as a whole. Keywords: model dynamics, virotherapy, measles virus, mouse lung tumors t; mu � ni�o� P� :IN'> viscosity, indeks of refraction, transparent liquid   BERKALA FISIKA 2012-03-28 21:23:50 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2788 BERKALA FISIKA; Vol 13, No 4 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/70080 2025-01-08T09:17:37Z berkala_fisika:ART

nmb a2200000Iu 4500 "240117 2024 eng " 1410-9662 dc ANALISIS NILAI KERMA DAN DOSIS TRANSMISI FANTOM TERHADAP TEBAL FILTER DAN TEGANGAN TABUNG PADA PESAWAT RADIOGRAFI UMUM S, Nurhidayanti Fisika Medik, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Hasanuddin, Makassar, Indonesia 90245 Astuty, Sri Dewi Fisika Medik, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Hasanuddin, Makassar, Indonesia 90245 Dewang, Syamsir Fisika Medik, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Hasanuddin, Makassar, Indonesia 90245 Bariah, Khairul Balai Pengamanan Fasilitas Kesehatan, Makassar, Indonesia, 90245 filter aluminium, KERMA, Nilai INAK, Nilai ESAK, fantom akrilik Penelitian ini bertujuan untuk menganalisis nilai KERMA dan dosis transmisi fantom terhadap variasi tebal filter dan tegangan tabung pada pesawat radiografi umum. Pengukuran KERMA dilakukan menggunakan detektor radiasi di berbagai tegangan tabung (kVp), yaitu 60, 63, 66, 70 dan 73 kV serta variasi ketebalan filter masing-masing 0,5, 1, 1,5, 2 dan 2,5 mm. Dosis transmisi fantom dievaluasi dengan menggunakan fantom yang merepresentasikan tubuh manusia untuk mendapatkan gambaran distribusi dosis yang diterima oleh pasien selama prosedur radiografi, melalui perbandingan nilai INAK dan ESAK. Hasil menunjukkan bahwa peningkatan ketebalan filter berpengaruh dalam mengurangi nilai KERMA udara yaitu 6,242 (tanpa filter) menjadi 2,772 (filter 2,5 mm) untuk 60 kV. Selain itu, tegangan tabung yang lebih tinggi cenderung meningkatkan dosis transmisi fantom yaitu dari 2,634 mGy (untuk 60 kV) menjadi 4,056 mGy (untuk 73 kV). Fantom mempengaruhi nilai INAK dan ESAK pada tegangan yang berbeda dengan nilai optimum diperoleh sebesar 5,133 mGy dan 6,929 mGy. Studi ini menyimpulkan bahwa antara ketebalan filter, tegangan tabung, dan kualitas citra radiografi sangat perlu dioptimasi untuk mencapai keseimbangan antara keselamatan pasien dan diagnostik yang akurat. BERKALA FISIKA 2024-01-20 16:27:18 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/70080 BERKALA FISIKA; Vol 27, No 1 (2024): Berkala Fisika eng Copyright (c) 2025 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/9297 2015-10-19T16:18:16Z berkala_fisika:RA

nmb a2200000Iu 4500 "141001 2014 eng " 1410-9662 dc IDENTIFIKASI FOKUS MIKROSKOP DIGITAL MENGGUNAKAN METODE OTSU Putranto, Ari Bawono Jurusan Fisika, Universitas Diponegoro, Semarang Adi, Kusworo Jurusan Fisika, Universitas Diponegoro, Semarang Gernowo, Rahmat Jurusan Fisika, Universitas Diponegoro, Semarang A study to identify focus on a digital microscope has been done using a threshold value of the object microscope image obtained by Otsu method. Microscope image of the object captured by the change from a maximum to a minimum distance between the object and the microscope objective lens to record the amount of movement of a motor stepper and calculates the Otsu threshold value on each image. Based on data from a Otsu threshold value of each microscope image of the object to the changes within the object can be inferred the existence of a relationship between the position of an object to focus the microscope with the image of the threshold value that is increasingly the focus of an image , the image of the Otsu threshold values ​​obtained are also getting smaller. In this study done by testing two samples as objects of microscope that single hair samples and samples collection of several hairs were each placed on a microscope glass slide. Data collection and observation results show that for a single hair samples obtained object focus Otsu threshold value T = 97 and sample an object consisting of a collection of some of the hair is obtained Otsu threshold value T = 127. But the testing of two samples showed differences influenced by the ratio between the number of pixels on the image and the background image of an object caused by the influence of the intensity of the light source of the microscope. Keywords: Focus Identification, Digital Microscope, Otsu Threshold BERKALA FISIKA 2015-10-19 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/9297 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 4 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3082 2012-04-07T12:32:41Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pengukuran Tebal Kontaminasi Zat Radioaktif pada Permukaan Tanah Secara In Situ Menggunakan Spektrometer Gamma Portabel Wijianto, Wijianto Jurusan Fisika, FMIPA, UNDIP Azam, Much. Jurusan Fisika, FMIPA, UNDIP Setiawati, Evi Jurusan Fisika, FMIPA, UNDIP Bunawas, Bunawas P3KRBiN-BATAN Determination of contamination’s thickness on the ground for  homogeneous  source compound Cs -137 and Co-60 use portable gamma  spectrometry with height purity germanium detector ( HPGe detector) have been done.There are two methods to determine contamination’s thickness on the ground surface. The first method is Korun’s modification by looking for the total count of gamma ray before and already to experience attenuation for Cs-137 and Co-60 then divided by the decrease of linear attenuation coefficient Cs-137 and Co-60. The second is Xu comparison method by made variation of distance from ground surface to detector surface then compared with total count of gamma ray from one source Cs-137 or Co-60 during counting time. The results from experiment obtained for Korun’s modification for the actual thickness 10 cm, 20 cm and 24 cm have an error at 2 % , for actual thickness 12 and 16 cm,and an error at 3 %, for actual thickness 6 cm and 8 cm an error of 4 % and, for actual thickness 4 cm have an error at 9 %. Then for the Al Ghamdi  to Xu Comparison method,  for Co-60 in the actual thickness 6 cm and 10 cm have error 3 % and 12 %, and for Cs-137 in the  actual thickness 10 cm and 6 cm have error 9 % and 48 %.   Key words:  HPGe detector, portable gamma  spectrometry, contamination, Korun’s modification and Xu comparison method. BERKALA FISIKA 2012-04-06 10:20:46 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3082 BERKALA FISIKA; Vol 9, No 4 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2865 2012-03-29T15:40:30Z berkala_fisika:EDT

nmb a2200000Iu 4500 1410-9662 dc Cover Juli 2009 Juli 2009, Cover Cover Berkala Fisika, Vol. 12, No. 3, Juli 2009 BERKALA FISIKA 2012-03-29 09:57:34 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2865 BERKALA FISIKA; Vol 12, No 3 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/10835 2016-04-21T12:16:26Z berkala_fisika:RA

nmb a2200000Iu 4500 "150701 2015 eng " 1410-9662 dc STUDI PARAMETER REAKTOR BERBAHAN BAKAR UO2 DENGAN MODERATOR H2O DAN PENDINGIN H2O Richardina, Very Jurusan Fisika, Universitas Diponegoro, Semarang Budi, Wahyu Setia Jurusan Fisika, Universitas Diponegoro, Semarang Tjiptono, Tri Wulan Badan Tenaga Atom Nasional Yogyakarta PWR, reactor parameters, effective multiplication factor (keff), WIMSD5B Research about study of Pressurized Water Reactor (PWR) parameters using UO2 as fuel materials with moderator of H2O and coolant of H2O for heterogeneous infinite cylinder design  has realized. There is one of design to make nuclear reactor, it is a neutronic design. At neutronic design, first must calculations to determine group constants ( neutron cross section and the multiplication factor). The neutronic equations with one dimensional  transport theory for annulus geometry can be solved with WIMSD5B codes. Numeric method that used was one dimensional homogenization cell methods. To archieve   steady state or reactor, used enrichment of U235 between 2% until 3,2% with variation 0,05%. From the result with cluster methods with 32 groups and 10 regions, steady states of reactor at enrichment of U235 is 2,9% with effective multiplication factor (keff) = 1,006491. Keywords: PWR, reactor parameters, effective multiplication factor (keff), WIMSD5B BERKALA FISIKA 2016-04-21 11:48:02 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/10835 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 3 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3099 2012-04-07T12:39:36Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc DETERMINATION ROCK DENSITIES OF ULUBELU GEOTHERMAL LAMPUNG BY USING GRAVITY METHOD COMBINED WITH BOREHOLE METHOD Suharno, Suharno Physics Department the University of Lampung, Bandar Lampung Danusaputro, Hernowo Physics Department the University Diponegoro, Semarang The Ulubelu geothermal system is located within Tanggamus volcanism. Rock densities were measured from wells Rendingan (Rd), Kukusan I (Kk1), Kukusan II (Kk2), Ulubelu II (UBL2) and Ulubelu III (UBL3). A terrain density estimate was made across line GG’ using the Nettleton method. The measured densities results, show values ranging between 2.60 x 103 kg m-3 and 2.70 x 103 kg m-3.  The density estimated profile is presented in Figure 2 shows the density of about 2.70 x 103 kg m-3. Combined with the results from the laboratory measurements of borehole samples and density estimated, those suggest as  the mean density of upper continental crust commonly used for the reduction of Bouguer anomalies (2.67 x 103 kg m-3). BERKALA FISIKA 2012-04-06 10:20:23 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3099 BERKALA FISIKA; Vol 9, No 2 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2921 2012-03-30T14:32:17Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Kajian Teoritis Penentuan Tetapan Planck Menggunakan Model Elektrodinamika Maxwell Zaada Faidullah, Ilmy Jurusan Fisika FMIPA Universitas Diponegoro Sasongko, Dwi P. Jurusan Fisika FMIPA Universitas Diponegoro Priyono, Priyono Jurusan Fisika FMIPA Universitas Diponegoro Theory of Electromagnetism and Planck constant have important role in the development of light theory. Electromagnetism theory explains the velocity of light is constant and finite because light is phenomenon of propagation of Electromagnetism Wave. Distribution of Planck Radiation that introduces Planck constant also based on the theory of Electromagnetism, however, now light treated like as a particle. Planck constant not only radically changes concept of light but also has be main source of the birth of Modern Physics. An interesting thing to investigate connection between Maxwell equation that well known with concept of classically Physics and Planck constant, a constant that often used in Quantum Mechanics. Deriving Planck constant from Maxwell Equation can be done by understanding study of Radiation Quantization that based on the assumption. First, Electromagnetism wave is on the vacuum space so there is no charge and current. Second, Hamiltonian of Radiation stated by Hamiltonian of Harmonic Oscillation. Third, mass of Photon regarded does not affect Hamiltonian of Radiation because it is difficult to determine rest mass of Photon. Fourth, Dirac postulate used as non commutable multiplication rule of position and momentum coordinate. In this research has obtained an elaborate explanation deriving Planck constant from Maxwell equation that can be shorted as follow. From Maxwell equation will be derived Maxwell wave equation that consist of Vector Potential Fields. Its form similar with Harmonic Oscillation function so Hamiltonian Radiation can be stated as Hamiltonian of Harmonic Oscillation. By Using Dirac postulate, Oscillation Harmonics can be studied in Quantum Mechanic so will be obtained  Planck constant that contained on the Fourier Coefficient Operator.   Keywords : Maxwell Equation, Planck Constant, Fourier Coefficient Operator. BERKALA FISIKA 2012-03-29 14:54:02 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2921 BERKALA FISIKA; Vol 12, No 4 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/23824 2019-06-27T09:31:30Z berkala_fisika:EDT

nmb a2200000Iu 4500 "190624 2019 eng " 1410-9662 dc TINGKAT KETERBACAAN, KETERUNDUHAN, DAN SITASI BERKALA FISIKA Anam, Choirul Departemen Fisika Fakltas Sains dan Matematika Universitas Diponegoro Tingkat Keterbacaan, Keterunduhan dan Sitasi Berkala Fisika BERKALA FISIKA 2019-06-24 11:44:36 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/23824 BERKALA FISIKA; Vol 22, No 2 (2019): Berkala Fisika Vol. 22 No. 2 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4977 2013-05-27T11:13:22Z berkala_fisika:RA

nmb a2200000Iu 4500 "120101 2012 eng " 1410-9662 dc APLIKASI METODE GEOLISTRIK TAHANAN JENIS UNTUK MENENTUKAN ZONA INTRUSI AIR LAUT DI KECAMATAN GENUK SEMARANG Nisa, Khoirun Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Yulianto, Tony Jurusan Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Widada, Sugeng Prodi Ilmu Kelautan Fakultas Perikanan dan Ilmu Kelautan Universitas Diponegoro An interpretation has been conducted to the salt water spreading in the district of Semarang city Genuk area by the geoelectrical method of resistivity using Schlumberger electrode configuration. Acquisition of field data were processed using Ip2win program whose results are used to describe the resistivity cross-section area of research. Resistivity cross-section was combined with thedistribution of groundwater sanility from electrical conductivity value approach to determine thezoning of sea water intrusion in the study area. Zone of sea water intrusion in the district of Semarang city Genuk are consist regionKarangroto and Sembungharjo starting from a depth of 80 meters, Bangetayu west starting from adepth of 100 meters, 140 meters depth Genuksari start, and Trimulyo ranging from a depth of 200meters with values of electrical conductivity 16.550 Ωm. Key Words : Geo-electrical, sea water intrusion BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4977 BERKALA FISIKA; Vol 15, No 1 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2937 2012-03-30T15:03:39Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Identifikasi Struktur Lapisan Bawah Permukaan Daerah Manifestasi Emas Dengan Menggunakan Metode Magnetik Di Papandayan Garut Jawa Barat Arifan Kahfi, Rian Jurusan Fisika Universitas Diponegoro Yulianto, Tony Jurusan Fisika Universitas Diponegoro A geophysical investigation has been done using magnetics method at Papandayan, Garut, West Java. The aims of this research are to interpret the sub-surface geology structure at Papandayan based on 2D modelling and geological information. Raw data processing was performed using IGRF (International Geomagnetics Reference Field) and diurnal variation correction to obtain total field magnetic anomaly. Upward continuation was performed at 150 meters height above reference spheroide for total field anomaly. Reduction to pole was performed to simplify interpretation process. Data acquired using Proton Precession Magnetometer (PPM) and Global Positioning System (GPS) Garmin during 3 days, which cover an area of 600 meter x 1100 meter and measurement spacing was 5 meter. Qualitative interpretation were done by upward continuation total field magnetic anomaly maps. While quantitative interpretation was done by 2D modelling by slicing upward continuation total field magnetic anomaly maps using Geomodel. It is interpreted that Papandayan sub-surface geology structure was controlled by tuff rock with susceptibilities 1 x 10-5 in emu system, andesite rock with susceptibilities 0.0135 in emu system, porphyry rock 0.010 in emu system, intrusion rock with susceptibilities 0.013 in emu system, sedimentary rock with susceptibilities 7 x 10-5 in emu system, and sedimentary rock with susceptibilities 8 x 10-5 in emu system. Porphyry rock as gold prospect is interpreted as alteration zone of silisification. Keyword: magnetics, gold, Papandayan. BERKALA FISIKA 2012-03-30 14:12:23 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2937 BERKALA FISIKA; Vol 11, No 4 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/27311 2020-06-08T13:09:22Z berkala_fisika:ART

nmb a2200000Iu 4500 "191213 2019 eng " 1410-9662 dc RANCANG BANGUN OTOMATISASI PENGATURAN POSISI MEJA CT SCAN UNTUK CENTERING PASIEN MENGGUNAKAN KAMERA KINECT BERBASIS MIKRO-KONTROLER Setyawati, Rohmah Cahya Eka Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Anam, Choirul Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Suryono, Suryono Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Arifin, Zaenal Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Sumariyah, Sumariyah Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro CT, meja pasien, mikro-kontroler, kamera Kinect, patient center, gearbox Computed tomography (CT) merupakan suatu alat yang digunakan untuk mendapatkan citra tubuh pasien untuk mendiagnosis berbagai penyakit. Tujuan penilitian ini adalah mengotomasi posisi meja pasien CT scan menggunakan kamera Kinect berbasis Mikro-kontroler ATmega 328p sesuai ukuran tubuh pasien. Mikro-kontroler ATmega 328p digunakan sebagai pusat kendali otomatis dalam menggerakkan meja pasien ke atas-bawah sehingga posisi tengah pasien tepat berada pada iso-center. Adapun Mikro-kontroler mendapt input dari perbedaan posisi center pasien dan iso-center pesawat CT yang diperoleh dari citra yang dihasilkan oleh kamera Kinect. Penelitian ini telah berhasil merealisasi sistem otomatisasi posisi meja CT yang dapat dinaikkan dan diturunkan secara otomatis dan dikendalikan berdasarkan input dari kamera Kinect. Meja pasien CT bergerak naik 1 cm untuk setiap empat kali putaran motor. Meja dapat begerak hingga batas maksimal sejauh 15 cm. Kata Kunci: CT, meja pasien, mikro-kontroler, kamera Kinect, patient center, gearbox. BERKALA FISIKA 2019-12-12 08:25:35 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/27311 BERKALA FISIKA; Vol 22, No 4 (2019): Berkala Fisika Vol. 22 No. 4 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/2980 2012-04-03T12:35:00Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Variasi Nilai Eksposi Aturan 15 Persen pada Radiografi Menggunakan Imaging Plate untuk Mendapatkan Kontras Tertinggi Sartinah, Sartinah RS Elisabeth Semarang Sumariyah, Sumariyah Lab. Elektronika & Instrumentasi, Jurusan Fisika FMIPA UNDIP Ketut Umiati, N. Ayu Lab. Fisika Zat Padat, Jurusan Fisika FMIPA UNDIP The study about implementation of 15 % rule for getting the highest contrast of radiograph from Computed Radiography has been done.Computed Radiography that has been used in this research was Diagnost 65 Equipment with Step wedge as object, Imaging Plate as the storage system of digital data that will be treated to become image. Diagnost 65 Computed Radiography was operated with exposure factors such as;  50 kV/80 mAs, 60 kV/40mAs, 80 kV/10 mAs, 100 kV/2.5 mAs and 110 kV/1.25 mAs with plus and minus variation of  15 % voltage. Print out Radiograph by using Laser Printer was measured its densities by using densitometer. Value of densities and contras of exposure standard were compared with value of densities and contras of exposure with plus and minus variation of 15 % rule. By using contras obtained, the highest contrast was identified.The Results research show trend of densities value; its increase thick step wedge hence the density is smaller and increase thin step wedge hence the ever greater density. Highest radiograph contrast value got at various value exposure with voltage drop of tube 15% with twice of the current was multiplied the time. From this research yielded spread implementation of 15 % rule for computed radiography at various the exposure factors 60 kV-110kV. Keywords: 15%-rule, radiograph contrast BERKALA FISIKA 2012-04-03 11:52:36 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2980 BERKALA FISIKA; Vol 11, No 2 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/30625 2020-06-08T16:06:35Z berkala_fisika:ART

nmb a2200000Iu 4500 "200430 2020 eng " 1410-9662 dc KARAKTERISASI LUCUTAN PLASMA YANG DIBANGKITAN DENGAN ELEKTRODA AKTIF MENGGUNAKAN JARUM SUNTIK DAN ELEKTRODA PASIF BERUPA BIDANG LENGKUNG PADA KONDISI ATMOSFIR Ardhianto, Khamdi Bagas Laboratorium Fisika Radiasi, Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Bawono, Ari 2Sekolah Vokasi Universitas Diponegoro Muhlisin, Zaenul Center for Plasma Research, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang arc discharge, point to plane reactor, syringe waste, curve electrode. Research on characterization of plasma discharge generated by active electrodes using syringes and passive electrodes in the form of curved fields under atmospheric conditions has been carried out. The study was conducted to obtain the characteristics of the I-V relationship and visual picture of the formed discharge. The syringe used was 0.6 mm in diameter and was used as an active electrode. Plasma discharge was generated by connecting the syringe and curvature with a high-voltage DC (HV DC) generator. The syringe was connected with a positive pole, given a potential difference gradually to the maximum of HV DC and observed for the plasma discharge. After that, the syringe was connected to the negative pole, then given a potential difference gradually until the maximum of HV DC and observed plasma discharge. The distances between the point electrode and the curve electrode were 2 mm, 3 mm, 4 mm and 5 mm. The results showed that the relationship between current and voltage on the syringe as positive and negative electrodes followed the equation I ~ V2 until just before the spark discharge appeared and then arc discharge. The variation in the distance between the electrodes in each syringe treatment affected the amount of voltage needed to generate discharge. The greater the distance between the electrodes, the greater the voltage needed to reach the arc discharge. BERKALA FISIKA 2020-06-08 15:31:49 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/30625 BERKALA FISIKA; Vol 23, No 2 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5004 2013-05-27T15:53:42Z berkala_fisika:RA

nmb a2200000Iu 4500 "130101 2013 eng " 1410-9662 dc PENGARUH TANGGAPAN DETEKTOR KAMERA GAMMA SPECT PADA PEMERIKSAAN GINJAL Arifin, Zaenal Jurusan Fisika FSM Universitas Diponegoro Soejoko, Djarwani S Jurusan Fisika, FMIPA, Universitas Indonesia In nuclear medicine, it is common to exam by using SPECT / SPECT-CT for planar ortomographic imaging. SPECT aircraft can be equipped with one or more detectors. The studyaims to determine the response to the two detectors in SPECT gamma cameras. Furthermore, eachdetector used for renal function. The study consisted of two phases, the first to determine theresponse of each detector using acrylic phantom and the source of Technetium-99m activity of1mCi to 25 mCi. The second stage, renal function tests with planar imaging in four patients usingdetector 1 and detector 2. Acrylic phantom measurement results show the detector response 1 wasrelatively higher. Although the detector 2 has a lower response but is still linear with respect to the activity. In the examination of the kidneys, the evaluation focused on image analysis, count rate, uptake, GFR and transit function of time. The fourth image shows the patient count rate ofdetector 1 is also relatively high. Left kidney uptake value detection results both detectors showedno significant differences, with a mean value (48.3 ± 3.9)% and (51.7 ± 2.2)% for detector 1 anddetector 2. Both detectors generate GFR values in all four patients were in the range of 58-96 ml /min of detector 1 and 75-98 ml / min of detector 2. The results of these two detection detectortransit time function shows the left kidney patients in all phases of the four showed no significantdifferences. It was concluded that the two detectors have relatively low response but is still linearwith respect to the activity. Therefore detector 2 can still provide diagnoses did not differsignificantly with detector 1. Keywords : SPECT, Technetium-99m, response of detector, Examination of Renal BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5004 BERKALA FISIKA; Vol 16, No 1 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3004 2012-04-04T07:39:08Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Kajian Hasil Pembuatan Tiga Macam Ukuran Lubang Berbentuk Persegi Panjang Pada Tubuh Tungku Sekam Darmasetiawan, H. Departemen Fisika FMIPA Institut Pertanian Bogor Irzaman, Irzaman Departemen Fisika FMIPA Institut Pertanian Bogor Demijati, Demijati Departemen Fisika FMIPA Institut Pertanian Bogor Siswadi, Siswadi Departemen Matematika, FMIPA - Institut Pertanian Bogor Jl. Meranti Gedung FMIPA, Kampus Dramaga, Bogor 16680 Husk furnace is used for cooking fuel chaff with the aid of air flow in the furnace. One measurement of the husk furnace efficiency can be studied by varying the size of the primary air holes on the body of the furnace. In this study, a hole measuring 22 cm X 24 cm obtained by the rate of fuel consumption of 6.03 kg / hour of heat energy needed to boil water as much as 6 liters is 2575.00 kcal / h and 14.32% efficiency furnace. While in the hole measuring 22 cm X 8 cm and 22 cm X 16 cm, respectively 12.92% and 12.87% efficiency furnace, not significantly different.   Keywords: chaff, husk furnace, ukuruan primary air hole, furnace efficiency BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3004 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/39827 2021-07-05T11:38:49Z berkala_fisika:ART

nmb a2200000Iu 4500 "210705 2021 eng " 1410-9662 dc PEMBUATAN DAN KARAKTERISASI ARANG AKTIF IJUK POHON AREN (Arenga Pinnata) SEBAGAI MEDIA FILTRASI DESALINASI AIR PAYAU Teke, Sosiawati Prodi. Fisika, FMIPA, Universitas Halu Oleo Dewi, Wa Ode Nanang Trisna Prodi.Biologi, FMIPA, Universitas Halu Oleo Jali, Wa Prodi. Ilmu Kelautan, FPIK, Universitas Halu Oleo Yumnawati, Yumnawati Prodi. Fisika, FMIPA, Universitas Halu Oleo arang aktif, microwave, air payau, filtrasi Salah  satu  masalah  yang  dihadapi  masyarakat  pesisir  adalah  kurangnya  ketersediaan  air bersih.    Masyarakat  pesisir  memanfaatkan  air  sumur  gali,  air  laut  dan  air  payau.  untuk memenuhi kebutuhan air bersih. Mengkonsumsi air dengan kadar garam yang lebih banyak dari  air  tawar  dalam  jangka  panjang  dapat  berdampak  buruk  bagi  kesehatan,  sehingga diperlukan metode pengolahan air payau menjadi air tawar yang murah dan mudah  salah satunya  dengan  pemanfaatan  arang  aktif.  Arang  aktif ijuk  pohon  aren  diharapkan  mampu menurunkan kadar salinitas dalam air payau dan dapat membantu masyarakat pesisir untuk memperoleh kualitas air yang memenuhi standar parameter kualitas air bersih.  Ijuk pohon aren  dikarbonasi  dengan  metode  pirolisis  pada  suhu  450oC  selama  15  menit  dan  aktifasi menggunakan  pemanas  microwave  dengan  daya  300  Watt,  selama  4,  5,  6  dan  7  menit. Karakterisasi  arang  aktif  menggunakan  SEM,  menunjukan  bahwa  waktu  aktifasi mempengaruhi jumlah dan luas permukaan pori dari arang ijuk pohon aren. Penambahan arang  aktif  selama  2  menit  ke  dalam  air  payau  dapat  menurunkan  salinitas  air  payau. Karbon  aktif  yang  teraktifasi  selama  7  menit  diaplikasikan  pada  media  filtrasi  air  payau dan diperoleh penurunan salinitas air payau. Berdasarkan percobaan yang telah dilakukan bahwa  waktu  aktifasi  mempengaruhi  jumlah  dan  luas  permukaan  pori  arang  ijuk  pohon aren  dan  arang  ijuk  pohon  aren  teraktifasi  dapat  menurunkan  kadar  salinitas  pada  air payau. BERKALA FISIKA 2021-07-05 11:38:49 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/39827 BERKALA FISIKA; Vol 24, No 1 (2021): Berkala Fisika eng Copyright (c) 2021 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5260 2013-08-01T09:45:13Z berkala_fisika:RA

nmb a2200000Iu 4500 "130701 2013 eng " 1410-9662 dc PEMBUATAN ELEKTRODA DAN PERANCANGAN SISTEM CAPACITIVE DEIONIZATION UNTUK MENGURANGI KADAR GARAM PADA LARUTAN SODIUM CLORIDA (NaCl) Himmaty, Ikfina Jurusan Fisika, Fakultas MIPA, Institut Teknologi Sepuluh Nopember, Surabaya Endarko, Endarko Jurusan Fisika, Fakultas MIPA, Institut Teknologi Sepuluh Nopember, Surabaya Fabrication of electrode and design of capacitive deionization (CDI) have been successfully carried out. Electrodes have been made using an activated carbon from coconut shell, graphite andepoxy with ratio 82:10:8. Mixture of activated carbon and graphite poured on an epoxy solution, andthen it was added with hardener and epoxy resin (1:1). Electrodes with dimension of 8 × 6 × 0.3 cmhave been made with doctor blade method. Specific capacitance of the electrode measured at 7.8 mF/gwith porosity 13.4%. Desalination is done by passing a solution of NaCl 0.5 M with a flow rate 3.5 ml/min in the CDI system. Salt removal in the capacitive deionization can be measured withconductivity parameter of NaCl solution before and after the desalination process. Calculation ofpercentage reduction in NaCl concentration can be determined by the decrease in conductivity of thesolution after desalination. The results showed that the maximum percentage reduction of salt levels inthe NaCl 0.5 M solution for configurations of monopolar and bipolar were achieved at 10.4% and4.3%, respectively, within 5 minutes of testing time. Keywords: capasitive deionisation (CDI), desalination, activated carbon from coconut shell BERKALA FISIKA 2013-08-01 09:11:11 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5260 BERKALA FISIKA; Vol 16, No 3 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3044 2012-04-07T12:48:06Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Kajian Efektivitas Pembelajaran Fisika Dalam Meningkatkan Technological Literacy Dan Kreativitas Siswa Smp Melalui Implementasi Program Pendidikan Teknologi Dasar (PTD) T. Chandra, Didi Jurusan Pendidikan Fisika FPMIPA UPI This research is part of the development program of Technology Education Association (PTD) in junior high school, conducted to test the effectiveness of the PTD program in improving technological literacy and creativity of students. The study was conducted by comparing the learning of physics topics through dynamic power and non PTD PTD. The research method used was a quasi experimental research design with pretest-posttest matched control group design. The samples were students at two different schools but have the same academic homogeneity, with students in classroom learning physics experiments through PTD while controlling class of students in learning physics through non-PTD. The research instrument in the form of test device used to measure technological literacy, and creativity of students. The results showed convincingly that learning physics through PTD is more effective in improving technological literacy, and creativity of students as compared to learning physics through non-PTD. Keywords: PTD, Technological Literacy, Creativity. BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3044 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2863 2012-03-29T12:49:32Z berkala_fisika:EDT

nmb a2200000Iu 4500 1410-9662 dc Cover Oktober 2010 Oktober 2010, Cover Cover Berkala Fisika, Vol. 13, No. 4, Oktober 2010 BERKALA FISIKA 2012-03-28 21:23:50 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2863 BERKALA FISIKA; Vol 13, No 4 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/47429 2022-07-27T01:07:20Z berkala_fisika:ART

nmb a2200000Iu 4500 "220727 2022 eng " 1410-9662 dc PENINGKATAN KINERJA CONTROL VALVE AKIBAT FENOMENA RESET WINDUP PADA SISTEM REBOILER Hersaputri, Megarini Teknologi Rekayasa Otomasi, Sekolah Vokasi, Universitas Diponegoro Yuniarto, Yuniarto Teknik Listrik Industri, Sekolah Vokasi, Universitas Diponegoro Putranto, Ari Bawono Teknologi Rekayasa Otomasi, Sekolah Vokasi, Universitas Diponegoro Tadeus, Dista Yoel Teknologi Rekayasa Otomasi, Sekolah Vokasi, Universitas Diponegoro Mangkusasmito, Fakhruddin Teknologi Rekayasa Otomasi, Sekolah Vokasi, Universitas Diponegoro control valve, reboiler, temperature, coefficient valve One of the important elements of the LPG production process is the control valve. Control valves is almost 90% found in the LPG process. The size of the control valve must have a standard size so that the performance of the control valve is more optimal. Control valve CV1 is a control valve to regulate the flow of steam to reboiler in the distillation column. CV1 at the gas processing plant which is the object of research is experiencing the phenomenon of reset wind up, reset wind up is a  phenomenon  where  the  variable  control  valve  process  is  unable  to  reach  the  set  point  at  the indicating point (TIC) even though the control valve has reached 100% opening. The phenomenon of reset wind up on CV1 affects the temperature  of the steam used for the reboiler. If the steam produced  by  the  reboiler  is  not  up  to  separation  standard  in  propane  distillation,  then  the  C3 separation is not perfect and will affect the LPG yield. To improve the performance of the control valve, it is necessary to calculate the coefficient valve on the control valve and replace the internal valve parts. From this research, the coefficient value is 591, control valve body type ET-667 with diameter of 8 "and a travel indicator 2" is 567. This difference also occurs when the valve openings are 50%, 72%, 75% and 100%. The calculated coefficient valve value should be less than the data sheet. Internal part replacement was also carried out in this study, by replacing the cage on the control valve into a cage with a linear type. BERKALA FISIKA 2022-07-27 01:07:20 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/47429 BERKALA FISIKA; Vol 25, No 2 (2022): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/6577 2014-03-21T15:24:15Z berkala_fisika:RA

nmb a2200000Iu 4500 "140101 2014 eng " 1410-9662 dc Kajian Efisiensi dan Karakterisasi Produksi Ozon dengan Lucutan Plasma Berpenghalang Dielektrik (DBDP) untuk Pengendalian Jamur dalam Beras Rachman, Dian Arif Program Studi Magister Ilmu Fisika, Universitas Diponegoro Semarang Nur, Muhammad Jurusan Fisika, Universitas Diponegoro Semarang Kusdiyantini, Endang Jurusan Biologi, Universitas Diponegoro Semarang A research about the influence of ozone on fungi  which living on rice type mentik that used natrium agar (TPC methode) media has done.  The research was done at normal temperature and the outside air pressure with free air as a source of ozone. The ozone concentration of 2.91 up to 3.19 ppm was radiated on 7 differnet samples of rice, each sample 50 gram used ozonized  time variation 0 minutes, 30 minutes, 60 minutes, 90 minutes, 120 minutes, 150 minutes and 180 minutes. It was obtained results the number of fungi that died of 97,3 % after ozone irradiated for 30 minutes and 99,2% after 60 minutes. Total number of fungi which has dead during 150 minutes as much 99,9 %. Characterization of ozone conducted using ozone reactor (Dielectric Barrier Discharge Plasma). variation in the voltage and the rate of air flow was performed to obtain the optimum concentration of ozone. Voltage variation started from 6 kV, 6 kV, 8 kV and 6 kV whereas variation of oxygen flow rate of 0.5 L/min, 1 L/min, 2 L/min and 3 L/minute. The results obtained with the same tendency which is that at the same voltage, the higher the air flow rate and declining concentrations of ozone. On the study for flow rate of 0.5 L/min the ozone concentrations was obtained 4.6 up to 6.8 ppm. While for flow rate of 3 L/minute ozone concentrations was obtained 2.9 up to  4.8 ppm. Keywords: fungi, natrium agar, irradiate, reactor BERKALA FISIKA 2014-03-21 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/6577 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 1 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3061 2012-04-07T08:44:22Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Interpretasi Bawah Permukaan Dengan Metode Self Potential Daerah Bledug Kuwu Kradenan Grobogan Dwi Indriana, Rina Laboratorium Geofisika Jurusan Fisika FMIPA Universitas Diponegoro Nurwidyanto, M. Irham Laboratorium Geofisika Jurusan Fisika FMIPA Universitas Diponegoro W. Haryono, Kurnia Laboratorium Geofisika Jurusan Fisika FMIPA Universitas Diponegoro The geophysics research to observe the subsurface anomaly in Bledug Kuwu had been done. It was used to analyze and interpret the potential data. The purpose of this research was to interpret the object of subsurface anomaly. The research was used self potential method with base point electrode configuration. Data processed used Surfer 8 software, which result was an isopotential contour map. The modeling processed used curve matching for a spherical model. By using Bhattacharya theory, the depth and polarization angle was founded as the parameter of a spherical model. The research’s result of the depth of anomaly origin is 19,5 m, 23,68m, and 40,8 m. The polarization angle is 70o, 70,38o and 100o.   Keywords: Bledug Kuwu, self potential, spherical model   BERKALA FISIKA 2012-04-06 10:17:20 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3061 BERKALA FISIKA; Vol 10, No 3 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2712 2012-03-29T14:39:03Z berkala_fisika:RA

nmb a2200000Iu 4500 "120329 2012 eng " 1410-9662 dc Pemodelan Struktur Pori Dari Batuan Geologi Dengan Fractal Ferani, S Jurusan pendidikan fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Pendidikan Indonesia Has done modeling with fractal pore structure and fracture of geology rock. Sun and Koch (1998)[2] states that the geological formations of porous rock has a fractal nature ..Modeling the generated fractal porous media have been carried out, which generated fractal modeling has the potential high enough to be able to model the porous media, although the modeling parameters require optimization in order to generate fractal porous media a valid model with actual data. The studied rock samples taken from surface rock formations Parigi Cirebon, West Java. Fractal model is then validated by optimizing the parameters that appear in the modeling for valid with the data of rock that can be estimated by image analysis.   Key words: fractal, models, rock geology BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2712 BERKALA FISIKA; Vol 13, No 3 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/60740 2023-12-17T10:05:13Z berkala_fisika:ART

nmb a2200000Iu 4500 "231217 2023 eng " 1410-9662 dc MODIFIKASI ALUMIA(α-Al2O3) TERHADAP PERUBAHAN MORFOLOGI DAN KEKERASAN PADA GLAS IONOMER (GIC) Fatmawati, Putri Laboratorium Fisika Material, Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Priyono, Priyono Laboratorium Fisika Material, Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Marhaendrajaya, Indras Laboratorium Fisika Material, Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro GIC, Al2O3, XRD, SEM-EDX, uji kekerasan vickers Glass Ionomer Cement (GIC) merupakan salah satu bahan restorasi yang paling banyak digunakan, namun memiliki banyak kelemahan dalam sifat mekaniknya. Dalam penelitian ini diusulkan salah satu  variasi  material  utama  penyusun  bubuk  GIC  untuk  mengetahui  pengaruhnya  terhadap karakterisasi dan kekerasan GIC. Sampel yang diuji adalah GIC dengan variasi penambahan Al2O3 (alumia)  sebanyak  0%,  2,5%,  5%,  7,5%,  10%,  dan  12,5%.  Selanjutnya  bubuk  GIC  dicampur dengan  cairan  GIC  sehingga  berbentuk  semen  dan  dicetak  sampai  mengeras.  Sebelum  sampel dicetak,  terlebih  dahulu  dilakukan  karakterisasi  menggunakan  X-ray  diffraction  (XRD).  Setelah sampel  dicetak  selanjutnya  diuji  menggunakan  scanning  electron  microscope–energy  dispersive X-ray (SEM-EDX) dan dilakukan uji kekerasan vickers. Hasil uji EDX menunjukkan lima senyawa penyusun  GIC dengan persentase berat  yang didominasi oleh SiO2 sebelum divariasi dan Al2O3 setelah  divariasi.  Hasil  SEM  dari  sampel  GIC  dengan  penambahan  Al2O3  sebanyak  12.5% menunjukkan morfologi permukaan yang lebih halus dan pori yang lebih sedikit serta warna yang lebih  gelap  dibandingkan  dengan  permukaan  sampel  GIC  murni.  Berdasarkan  hasil  XRD, penambahan variasi Al2O3 pada bubuk GIC menyebabkan terjadinya kenaikan fraksi berat Al2O3, kenaikan  ukuran  kristal  serta  terbentuknya  struktur  material  kristalin.  Hasil  refinement menggunakan software EXPGUI-GSAS yang terbaik pada sampel GIC murni diperoleh nilai chi square  (χ2)  =  1,  086  dan  nilai  wRp  =  0,1958  (19,58%)  serta  Rp  =  0,1461  (14,61%).  Nilai  uji kekerasan vickers terbaik diperoleh pada sampel dengan variasi Al2O3 sebanyak 10% dengan nilai 116,27  HV.  Dengan  demikian  dapat  disimpulkan  bahwa  variasi  Al2O3  dapat  mempengaruhi karakterisasi dan kekerasan GIC. BERKALA FISIKA 2023-12-17 10:05:13 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/60740 BERKALA FISIKA; Vol 26, No 2 (2023): Berkala Fisika eng Copyright (c) 2023 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/8881 2015-08-01T18:12:38Z berkala_fisika:RA

nmb a2200000Iu 4500 "140701 2014 eng " 1410-9662 dc PERANCANGAN DAN PEMBUATAN SENSOR TDS PADA PROSES PENGENDAPAN CaCO3 DALAM AIR DENGAN METODE PELUCUTAN ELEKTRON DAN MEDAN MAGNET Martani, Maylita Jurusan Fisika, FMIPA, Institut Teknologi Sepuluh Nopember Endarko, Endarko Jurusan Fisika, FMIPA, Institut Teknologi Sepuluh Nopember Total Dissolved Solids (TDS) meter has successfully been fabricated based on the principle of conductivity. Control system for monitoring the TDS level in the mini plant have been performed by microcontroller ATMega16 and Personal Computer. The study was to control a precipitation process of CaC03 in the water. Values of TDS from water sample in the mini plant have been monitored and controlled in real-time. All data have been recorded by microcontroller and then, the data will be sent to personal computer via USB interface. Monitoring data will be displayed in a computer screen. The result showed that the system could be used to control level of TDS at 356 - 300 ppm. Keywords : gravity of CaC03, Conduktivity, Control BERKALA FISIKA 2015-08-01 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/8881 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 3 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3077 2012-04-07T12:30:24Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Analisis Atribut Seismik untuk Identifikasi Potensi Hidrokarbon Maulana Hadi, Johan Jurusan Fisika FMIPA, Universitas Diponegoro, Semarang Nurwidyanto, M. Irham Jurusan Fisika FMIPA, Universitas Diponegoro, Semarang Yulianto, Gatot Jurusan Fisika FMIPA, Universitas Diponegoro, Semarang Rms amplitude and spectral decomposition attribute have been extracted for hydrocarbon potential identification in Amandah area, Talangakar Formation, North West Java Basin. Purpose of rms amplitude extractions is to see the change of lithology which is extreme. Example is like reservoir existence. Spectral decomposition has been used to see reservoir at thin thickness. The seismic attributes has been extracted from seismic data 3D Pre Stack Time Migration (PSTM). Log data has been taken from a well (AMD-01) to interpret and determine reservoir thickness in interest zone. Seismic attribute analysis has been used to see existence and shape of channel’s geometry spreading. The result of rms amplitude attribute extraction is reservoir which can be detected clearly at 10 ms, 20 ms, 30 ms and 40 ms window analysis. Whereas the result of spectral decomposition attribute extraction is reservoir which can be detected at 15 Hz – 25 Hz frequency with 30 ms and 40 ms window analysis. The result of rms amplitude and spectral decomposition attribute analysis shows hydrocarbon in Amandah area, Talangakar Formation is potential in channel depositional facies with depositional direction at north-south (N-S) and north nort east – south south west (NNE-SSW) and  thickness high of channel is concern at 36-60 m.   Key words: Seismic attribute, rms amplitude, spectral decomposition, reservoir, BERKALA FISIKA 2012-04-06 10:20:46 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3077 BERKALA FISIKA; Vol 9, No 4 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2832 2012-03-29T11:52:24Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Analysis of Sodium, Potassium and Calcium using a Portable Liquid Electrode Plasma Optical Emission Spectrometer Hidayanto, Eko Department of Physics, Diponegoro University, Semarang, Indonesia. Yamamoto, Takashi Department of Mathematical and Material Science, University of Tokushima, Japan. Kawai, Jun Department of Materials Science and Engineering, Kyoto University, Japan. Elements of sodium (Na), potassium (K) and calcium (Ca) in beverage samples and river water were analyzed with portable liquid electrode plasma - optical emission spectrometer (LEP-OES). The degree of reproducibility for emission intensities and individual variety of a disposal sample chip were investigated, and measuring conditions for quantitative analysis and the precision was discussed. The sensitivity for Na was higher than those for K and Ca by one or two orders of magnitude. Several ppm of Na and K, and several hundred of Ca in aqueous samples could be quantitatively analyzed with 2-30% of deviation without internal standard. The applied voltage was predominant factor for accurate quantitative analysis, and 800 V was found to be the best voltage estimation for quantitative analysis of alkaline metals contents. BERKALA FISIKA 2012-03-29 06:14:46 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2832 BERKALA FISIKA; Vol 14, No 1 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/75363 2025-07-01T01:08:35Z berkala_fisika:ART

nmb a2200000Iu 4500 "250130 2025 eng " 1410-9662 dc EVALUASI INDEKS GAMMA PADA TEKNIK PENYINARAN INTENSITY MODULATED RADIATION THERAPY (IMRT) UNTUK KANKER PAYUDARA MENGGUNAKAN ELECTRONIC PORTAL IMAGING DEVICE (EPID) Ariguntar, Astrid Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin Dewang, Syamsir Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin Astuty, Sri Dewi Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin Saleha, Saleha Instalasi Radioterapi Rumah Sakit TK. II Pelamonia Makassar, Indonesia Linear Accelerator (Linac), Indeks Gamma, Intensity Modulated Radiation Therapy (IMRT), Electronic Portal Imaging Device (EPID) Studi ini bertujuan untuk mengevaluasi indeks gamma pada Intensity Modulated Radiation Therapy (IMRT) untuk kanker payudara menggunakan Electronic Portal Imaging Device (EPID). Hasil penelitian didapatkan pada verifikasi indeks gamma pada lima pasien kanker payudara didapatkan pada pasien 1 dengan nilai GPR 86%±0,24, pasien 2 dengan nilai GPR 74%±0,17, dan pasien 4 dengan nilai GPR 87%±0,21. Adapun pasien 3 dan 5 memiliki nilai GPR ≥95% yang mendapatkan masing-masing 100% dan 99% dengan nilai Standar Deviasi ≤1. Berdasarkan hasil tersebut, EPID dapat digunakan sebagai alat dosimetri yang efektif untuk evaluasi distribusi dosis secara real-time. Dengan verifikasi ini, diharapkan tingkat keakuratan penyinaran dapat ditingkatkan, sehingga efektivitas terapi pada pasien kanker payudara menjadi lebih optimal. BERKALA FISIKA 2025-06-30 09:08:52 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/75363 BERKALA FISIKA; Vol 28, No 1 (2025): Berkala Fisika eng Copyright (c) 2025 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/9668 2015-12-08T10:02:37Z berkala_fisika:RA

nmb a2200000Iu 4500 "150401 2015 eng " 1410-9662 dc OPTIMASI PEMBANGKIT LISTRIK TENAGA ARUS LAUT MENGGUNAKAN SISTEM TURBIN SAVONIUS TERMODIFIKASI Rahmi L, Halida Jurusan Fisika, Universitas Jenderal Soedirman, Jl. Dr. Soeparno 61 Purwokerto 53123 Dharmala S, Budi Jurusan Fisika, Universitas Jenderal Soedirman, Jl. Dr. Soeparno 61 Purwokerto 53123 Gediana, Almas Jurusan Fisika, Universitas Jenderal Soedirman, Jl. Dr. Soeparno 61 Purwokerto 53123 Yusup, Agus Jurusan Fisika, Universitas Jenderal Soedirman, Jl. Dr. Soeparno 61 Purwokerto 53123 Septria, Wenty Jurusan Fisika, Universitas Jenderal Soedirman, Jl. Dr. Soeparno 61 Purwokerto 53123 Savonius turbine, sea flow, electrical energy, power plant Difficulty of access to service and installation of the electrical network in the area around a coast becomes a factor causing uneven distribution of power network. Therefore, a new prototype of Sea Flow Power Plant was prepared using a modified Savonius turbine. The modified Savonius turbine is a vertical wind turbine, which is modified into a horizontal turbine and made two pairs of turbines in different directions. Advantage of this turbine can optimally capture the come and back flows. Preparing prototype of the turbine is conducted after collecting data of the sea flow velocity surrounding Teluk Penyu - Cilacap, that is followed by manufacturing a modified Savonius turbine and prototype of PLTAL. Performance test reveals that the prototype can generate P =0,3 Watt, the velocity of turbine rotation ω = 44.42 rad/s, the turbine torque M = 0,0064 Nm and the diameter of turbine d = 0,32 m.  The sea flow velocity is often naturally changed leading to the turbine rotation change. It is found that the power and the turbine rotation increase with increasing the sea flow velocity.  At the sea flow velocity of  1,5 m/s, the prototype of PLTAL has good performance and very potential as a source of alternative electrical energy in the future. Keywords: Savonius turbine,  sea flow, electrical energy, power plant. BERKALA FISIKA 2015-12-08 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/9668 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 2 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3094 2012-04-07T10:34:26Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pemanfaatan Tempurung Kelapa Sebagai Bahan Baku Arang Aktif dan Aplikasinya Untuk Penjernihan Air Sumur di Desa Belor Kecamatan Ngaringan Kabupaten Grobogan Suhartana, Suhartana Jurusan Kimia FMIPA Undip Waste Piece of Coconut shell used in society often only used upon which burn or firewood. Some furniture industries minimize there, exploited as a tool of physic educative and souvenir. In other hand, can be taken away from piece of coconut shell could to raw material of active charcoal. Chemical content of active charcoals is carbon compound, is very good for process of liquid material purification, inorganic and also organic material goodness. In this research is existing active charcoal, used to make clear ground water at Belor Ngaringan Grobogan District. Result after treatment by active charcoal pH, hardness, salinity, biologycal oxygen demand and chemical oxygen demand were decrease.   Keyword: piece of coconut shell, active charcoal, liquid material purification. BERKALA FISIKA 2012-04-06 10:20:34 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3094 BERKALA FISIKA; Vol 9, No 3 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2888 2012-03-29T15:28:20Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Ozone Generator by Using Dielectric Barrier Discharge Plasma Technology With Spiral-Cylinder Configuration: Comparison Between Oxygen and Air As Sources Nur, Muhammad Atomic and Nuclear Laboratory, Faculty Of Mathematics and Natural Sciences, Diponegoro University Supriati, Aris Atomic and Nuclear Laboratory, Faculty Of Mathematics and Natural Sciences, Diponegoro University Hari Setyaningrum, Dyah Atomic and Nuclear Laboratory, Faculty Of Mathematics and Natural Sciences, Diponegoro University Gunawan, Gunawan Department of Chemistry Faculty Of Mathematics and Natural Sciences, Diponegoro University Munir, Mohammad Atomic and Nuclear Laboratory, Faculty Of Mathematics and Natural Sciences, Diponegoro University Sumariyah, Sumariyah Electronic and Instrumentation Laboratory, Faculty Of Mathematics and Natural Sciences, Diponegoro University The ozone generator with Dielectric Barrier Discharge Plasma Technology (DBDPT) with Spiral-cylinder configuration has been developed. DBDP Reactor was constructed with spiral wire and cylinder. Plasma condition has been generated by using AC high voltage Ozone has been produced by this technology with oxygen and dry air as sources for ozone generating. In this research we found that the concentration of ozone produced increases with increasing voltage with a time constant. This concentration also increases with increasing time in certain applied voltage. Ozone concentration was higher than the concentration of dissolved ozone in water. Dissolved ozone in water was only 10 % of ozone produced and only 7 % for dry air as source. Oxygen as source of ozone was better than dry air; both for ozone produced and dissolved ozone in water.   Keyword : Ozone, Spiral-cylinder, DBDP, Oxygen, Dry air BERKALA FISIKA 2012-03-29 09:48:12 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2888 BERKALA FISIKA; Vol 12, No 2 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/23478 2019-06-25T13:49:24Z berkala_fisika:RA

nmb a2200000Iu 4500 "190529 2019 eng " 1410-9662 dc RANCANG BANGUN SISTEM KENDALI IRON REMOVAL FILTER (IRF) PADA UNIT PENGOLAHAN AIR BERSIH BERBASIS PLC Karyadi, Kukuh Teknologi Rekayasa Otomasi, Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro Suseno, Jatmiko Endro Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro water treatment plant, Iron Removal Filter (IRF), PLC and HMI Water is a necessity of life and is very important for everyone. The availability of clean water has been fulfilled in various ways. The Iron Removal Filter (IRF) control system is one processings and it is still used in the ordinary water treatment plant. However, it is still manually operated so that it need many the processings. The aim of this research is to develop the automatic IRF processing unit using the Programmable Logic Controller (PLC). The control system contained PLCs, relay circuits, power supplies and Human Machine Interfaces (HMIs) to control the clean water processing unit including controlling the IRF process automatically. The prototype of the water treatment plant consisted of an aerator unit, an IRF unit, a storage tank, several pumps, and some control valves were controlled by the operating control system. The control system could be easily operated and it has a very attractive appearance using HMI. Therefore, it is highly recommended to be used in the actual clean water treatment unit. Keywords: water treatment plant, Iron Removal Filter (IRF), PLC and HMI BERKALA FISIKA 2019-05-29 10:45:06 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/23478 BERKALA FISIKA; Vol 22, No 1 (2019): Berkala Fisika Vol. 22 No. 1 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4972 2013-05-27T11:15:19Z berkala_fisika:RA

nmb a2200000Iu 4500 "111001 2011 eng " 1410-9662 dc STRUKTUR NANOKRISTAL CeO YANG DISINTESIS MENGGUNAKAN METODE PRESIPITASI DENGAN VARIASI LAMA WAKTU KALSINASI 2 Nursanti, Ida Laboratorium Fisika Material, Jurusan Fisika Universitas Diponegoro Muhlisin, Zaenul Laboratorium Fisika Material, Jurusan Fisika Universitas Diponegoro Sutanto, Heri Laboratorium Fisika Material, Jurusan Fisika Universitas Diponegoro Nurhasanah, Iis Laboratorium Fisika Material, Jurusan Fisika Universitas Diponegoro Nanocrystalline CeO have been synthesized by using a precipitation method. in a mixedsolvent system of aqua DM and isopropanol. Precipited was calcined at temperature of 300 C forvarious calcination time.  X-ray difractometer was used to investigate resulting presipitedmicrostructure.  X-ray diffraction patterns were analyzed to study effect of calcination time tostructure and crystallite size. Refinement process of x-ray diffraction pattern was carried out byusing Rietveld method.  The results show that all of precipited were CeO  nanocrystalline withsingle phase of cubic fluorite.  The difference in lattice parameter was correlated to oxygenvacancy.  Crystallite size was found in the range 9 – 11 nm, its incresed as calcination timeincreased.   The increasing of calcination time did not significant influence to  crystallite size. These result indicated that CeO  nanocrystalline  exhibited weak-agglomeration. Keywords: CeO222, nanocrystalline, microstructure, x-ray diffraction, precipitation 2 o BERKALA FISIKA 2013-05-25 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4972 BERKALA FISIKA; Vol 14, No 4 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2931 2012-03-30T14:28:25Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pengaruh Teknik Tegangan Tinggi Terhadap Entrasce Skin Exposure( ESE ) dan Laju Paparan Radiasi Hambur Pada Pemeriksaan Abdomen Dhahryan, Dhahryan RSUD Azam, M. Laboratorium Fisika Atom dan Nuklir Jurusan Fisika UNDIP The measurement for influence of high voltage technique to Entrance Skin Exposure and  Rate of Scattered Radiation Exposure on abdomen inspection have been conducted. The ESE measurement is conducted using Electrometer and  calculated by semi empirical method, while in measurement of rate of scattered radiation exposure using survey meter at a distance of 100 cm from the object by varying data intake points and its direction of detector. The result indicates that the usage of high voltage technique yields absorbent dose of 124 mrad and radiation exposure of 339 mR. It is lower than the standard value of absorbent dose of 322.7 mrad and radiation  exposure of 130,5 mR. The result of measurement is higher than calculation. In measurement of exposure of scattered radiation rate with detector position faced to object, on right side of cathode, it yields 1.03mR/hour with standard voltage and 0.32 mR/hour with high voltage technique. While in measuring  exposure of scattered radiation rate and back-scattered obtained result on A’ and C’ (close to anoda and side of object) and A” and C” nearly same, with highest value of 1 mR/hour and 0.93 mR/hour at standard tube voltage and at high kV technique obtained lower value of 0.29mR/hour and 0.25mR/hour. BERKALA FISIKA 2012-03-29 14:56:20 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2931 BERKALA FISIKA; Vol 12, No 1 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/25670 2019-09-30T08:44:40Z berkala_fisika:ART

nmb a2200000Iu 4500 "190917 2019 eng " 1410-9662 dc SINTESIS MATERIAL NANO Fe3O4 DARI KARAT BESI YANG BERPOTENSI DIAPLIKASIKAN SEBAGAI SOLAR ABSORBER PADA QUANTUM DOT SENSITIZED SOLAR CELL (QDSSC) Ma’rufah, Hani Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Rohmaniah, Siti Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Aripin, Muhamat Departemen Kimia, Fakultas Sains dan Matematika, Universias Diponegoro, Semarang Sutanto, Heri Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Corrosion iron, solar absorber, QDSSC Iron (Fe) corrosion that occurs in nature produces iron oxide (Fe3O4). The Fe3O4 has the strongest magnetic properties than in other phases such as Fe2O3. So far, Fe3O4 material from iron rust has not been widely used and further processed. If the material is made in the size of nano-meter, Fe3O4 will have ferromagnetic properties and have broad application opportunities. One of advantages is its ferromagnetic properties can absorb electromagnetic waves. High energy milling (HEM) is a physical method for making nano Fe3O4. One application of nano Fe3O4 material is as a solar absorber on quantum dot sensitized solar cell (QDSSC). In this research, the synthesis of Fe3O4 nano material from iron rust as solar absorber on QDSSC has been studied. One of the criteria of a solar absorber can be seen from the optical properties. From the scanning electron microscopy (SEM) test, it can be observed that the behavior of milling can reduce the size of the material. From the energy dispersive X-ray spectroscopy (EDS) test results, it was proven that pure synthesized material only contained Fe and O. From the X-ray diffractometer (XRD) test showed specific peaks formed were: 29.5, 350.0, 43.0, 54.0, 57.0, and 63.0. The UV-Vis test showed the band gap energy obtained was 3.3 eV. Keywords: Corrosion iron, solar absorber, QDSSC BERKALA FISIKA 2019-09-17 16:39:09 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/25670 BERKALA FISIKA; Vol 22, No 3 (2019): Berkala Fisika Vol. 22 No. 3 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4988 2013-05-27T16:02:48Z berkala_fisika:RA

nmb a2200000Iu 4500 "120701 2012 eng " 1410-9662 dc   AN IMPROVEMENT OF NEW TEST METHOD FOR DETERMINATION OF VEGETABLE OIL QUALITY BASED ON ELECTROOPTICS PARAMETER Firdausi, K Sofjan Department of Physics, Universitas Diponegoro, Semarang Triyana, Kuwat Department of Physics, Universitas Gadjah Mada, Semarang Susan, Ade Ika Department of Physics, Universitas Diponegoro, Semarang An improvement of measurement for determination of frying oil quality has been conducted based on electrooptics parameter. The samples were several palm oils, coconuts oil, arefine olive oil, and a corn oil. The measured electrooptics parameter was the change of light polarizationθ through the samples within an external electric field, which leads to the increase oftransmitted lightζ, obtained by tabulating θ via Malus’ Law. The electric field was produced by high DC voltage power supply 0-10 kV on two parallel plates in a separated distance of circa 1 cm. The sources of light were red diode laser 5 mW (λ=650 nm), green diode laser 5 mW (λ=532 nm), He-Ne laser 1 mW (λ=633 nm), and a 100W-ligth bulb. For palm oils, the average value Δζwas approximately between 3×10-4 and 8×10-4. For coconuts oil and corn oil, Δζ was in the rangevalue of palm oils. However for refine olive oilΔζ was the smallest, out of the range and indicated minimum amount of free radicals. The electrooptics parameter here could classify various types offrying oils, distinguish between fresh oils and used oils, and also distinguish between edible oilsand expired oils.  This method could be an alternative quality test of frying oils. It conductedwithout additional treatments, relative simple, and quite accurate. Keywords: electrooptics, frying oil, polarization, transmitted light BERKALA FISIKA 2013-05-27 00:00:00 https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4988 BERKALA FISIKA; Vol 15, No 3 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/30617 2020-06-08T15:23:16Z berkala_fisika:ART

nmb a2200000Iu 4500 "200131 2020 eng " 1410-9662 dc RANCANG BANGUN SISTEM KEAMANAN PINTAR PADA PINTU KAMAR MENGGUNAKAN RFID, PASSWORD DAN ANDROID BERBASIS ARDUINO UNO Setyawan, Agus Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Prabowo, Muhammad Nur Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Suseno, Jatmiko Endro Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang RFID, solenoid doorlock, security system, password, keypad, bluetooth, android, arduino The security system is very important for someone who often leaves his/her home or private room that can be used by perpetrators of crimes such as thieves. In this case, a tool is needed to anticipate this crime. Security is needed to protect ourselves and our valuable assets. In this study, a tool was used to secure a room by replacing a conventional door lock with a solenoid which can only be opened if entering passwords, cards or commands from the smartphone is correct. If entering a password or card is incorrect, then the system will lock the door automatically and sound an alarm for the specified time limit. if it is correct to enter a password or card then the system will open the solenoid and the door will open automatically without having to push the door. In addition to providing good safety, it also provides a practicality that is quite good because the door can be opened and locked automatically since we often forget ourselves to lock the door. BERKALA FISIKA 2020-06-08 13:14:30 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/30617 BERKALA FISIKA; Vol 23, No 1 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4999 2013-05-27T15:52:46Z berkala_fisika:RA

nmb a2200000Iu 4500 "130101 2013 eng " 1410-9662 dc REVIEW PENGUJIAN HUKUM MALUS DAN SIFAT OPTIS AKTIF LARUTAN GULA MENGGUNAKAN SISTEM DETEKSI CAHAYA Amitasari, Ria Jurusan Fisika Universitas Diponegoro Semarang Istiyawan, Wardono Jurusan Fisika Universitas Diponegoro Semarang Sugito, Heri Jurusan Fisika Universitas Diponegoro Semarang Bawono P, Ari Jurusan Fisika Universitas Diponegoro Semarang Firdausi, K Sofjan Jurusan Fisika Universitas Diponegoro Semarang Abstract In this paper, we review the test results of Malus’ Law and optical activity of sugarsolution using a system light detector. Two polarizers were used in the experiment to serve thechoice of a certain direction of electric field of light and to determine the change of polarizationangle. The change of transmitted intensity were measured using LDR detector which was thenacquisitioned by microcontroller and displayed via LCD and computer using  Microsoft Visual Studio C#. The experiment result is in agreement to the Malus’ Law with correlation coefficient of 0.99, and by using the equipment we obtain linearity between the change of polarization angle andconcentration of sugar solution, which is appropriate to the theory, as well. The specific rotarypower is (54±2) o/dm(g/mL) in the experimental uncertainty. Keywords: Malus law, change of polarization angle, light detector BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4999 BERKALA FISIKA; Vol 16, No 1 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2999 2012-04-04T07:35:57Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Model Panel Surya Cerdas Dengan Sensor Pelacak Cahaya Matahari Otomatis Berbasis Mikrokontroler Harjunowibowo, Dewanto P Fisika FKIP UNS Jl Ir Sutami 36A Kentingan Surakarta This research aims to create a model of intelligent solar panels are able to follow the movement direction of the sun as an energy source based on microcontroller AVR ATMEGA. This study uses ATMEGA AVR microcontroller 16bit with injection of fuzzy logic programs. The system also created using 4 (four) sensors LDR and 5 (five) photodiode sensor. Integration of fuzzy logic, AVR ATMEGA and sensors capable of providing optimal results into a dynamic model of the solar panels that automatically and can be applied on a large scale. The results of this study is a prototype solar panel that is able to follow the movement direction of the sun based on microcontroller AVR ATMEGA 16. The solar panels model is capable of putting solar panel surface perpendicular to the direction of sunlight intensity can be detected along the sensor.   Keywords: smart panel, microcontroller, fuzzy logic, sensor BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2999 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/34498 2020-11-28T15:02:49Z berkala_fisika:ART

nmb a2200000Iu 4500 "201126 2020 eng " 1410-9662 dc RANCANG BANGUN SISTEM PENGAMBILAN CITRA DAN PENGATUR POSISI JARAK OBYEK PADA MIKROSKOP DIGITAL MENGGUNAKAN JARINGAN WiFi SMARTPHONE ANDROID BERBASIS RASPBERRY Pi 3 DAN MIKROKONTROLER ESP32 Putranto, Ari Bawono Departemen Teknologi Industri, Program Studi DIV Teknologi Rekayasa Otomasi, Sekolah Vokasi, Universitas Diponegoro, Semarang Baital, Muhammad Sawal Departemen Teknologi Industri, Program Studi DIV Teknologi Rekayasa Konstruksi Perkapalan, Sekolah Vokasi, Universitas Diponegoro, Semarang Muhlisin, Zaenul Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Adi, Kusworo Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang In  this  study,  the  ESP32  microcontroller  and  the  Raspberry  Pi  have  been  successfully combined  to  adjust  the  position  of  the  digital  microscope  object  and  take  images  using  an android smartphone-based application via a WiFi network. The working method of adjusting the position of the microscope object is done by using the number of steps on a unipolar stepper motor  starting  from  the  farthest  distance  to  the  digital  microscope  objective  lens  which  is regulated by the ESP 32 microcontroller. Meanwhile, viewing the microscope object directly can  be  done  via  a  mobile  screen  connected  to  a  WiFi  network  to  a  digital  microscope  USB camera that has been converted into an IP camera by the Raspberry Pi. Therefore, through the use of a digital microscope application with an Android smartphone, it will be easier to obtain a sample image of a digital microscope object when conducting experiments in the laboratory. Keywords: Digital Microscope, Android Smartphone, WiFi, Rsabperry Pi, Microcontroller ESP 32 BERKALA FISIKA 2020-11-26 09:44:32 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/34498 BERKALA FISIKA; Vol 23, No 4 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5214 2013-07-30T08:53:03Z berkala_fisika:RA

nmb a2200000Iu 4500 "130401 2013 eng " 1410-9662 dc PERHITUNGAN ANALITIK PEMECAHAN SPIN RASHBA PADA QUANTUM DOT GaAs DALAM POTENSIAL PARABOLIK DUA DIMENSI Tri Cahyanto, Wahyu Program Studi Fisika MIPA, Fakultas Sains & Teknik, UNSOED, Purwokerto Hidayanto, Eko Jurusan Fisika Fakultas Sains dan Matematika Universitas Diponegoro Analytical calculation of Rashba spin-splitting on the GaAs-based quantum dots in the twodimensionalparabolic confinement. It has been investigated the spin splitting due to the Zeeman effectand a Rashba-type spin-orbit coupling on a disk-like GaAs-based quantum dot. Calculations weredone analytically considering the influence of an external magnetic field applied perpendicularly tothe dot. The result shows that spin-orbit interaction causes a “crossing” on the electron energy statesin the dot with the same angular momentum and different spin polarizations in a nonzero magneticfield. The calculated magnitudes of spin splitting and magnetic fields at the crossing level can be usedto discuss more realistic quantum dots model theoretically on the further research.Keywords: Rashba spin-orbit coupling, GaAs-based quantum dots, crossing levels BERKALA FISIKA 2013-07-28 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5214 BERKALA FISIKA; Vol 16, No 2 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3039 2012-04-07T12:46:23Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Interpretasi Struktur Bawah Permukaan Daerah Gunung Merbabu – Merapi Berdasarkan Pemodelan 3D Anomali Bouguer Sarkowi, Muh Program Studi Teknik Geofisika, Fakultas Teknik Universitas Lampung, , Jl. Prof. Soemantri Brodjonegoro No. 1, Bandar Lampung, Telp. (0721)703475-708. Mount Merbabu represent the volcano which keep a lot of mystery because its activity not many known by vulcanology expert. At least existing data about activity of Mount Merbabu cause the its activity characteristic not yet can be expressed surely. Study [of] about characteristic of Mount Merbabu needed to to learn the nature of vulcanisme activity so that action prevetive fall the victim and disaster mitigation can be done early possible.  While the Mount of Merapi represent the most active volcano in the world. In Its activity, eruption Merapi Mount  yield the hot cloud (wedus gembel) with the temperature 3000 º C to  glide the mean reach the distance 4-5 km. In this research we have been done modeling and interpretation of Bouguer anomaly around  Mt. Merapi and Merbabu. Result of research indicate that Mt. Merapi and Merbabu have the negative anomaly which because of existence  magma chamber. The magma chamber in Mt. Merapi have a convex form with the deepnes from 500 – 6000 meter from meas sea level, while the magma chamber in Mt. Merbabu have the same from but rather minimize with the deppnes magma chamber about 1000 – 4000 meter from means sea level.  Magma chamber in Mt. Merapi caontain liquid magma while the solid magma in Mt. Merbabu.   Keywords : Mount Merapi, Mount Merbabu, Gravity BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3039 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/46856 2022-06-13T14:40:23Z berkala_fisika:ART

nmb a2200000Iu 4500 "220613 2022 eng " 1410-9662 dc KARAKTERISTIK PEMBANGKITAN LUCUTAN KORONA ARUS DC NEGATIF DENGAN KONFIGURASI ELEKTRODA DUA PISAU YANG MEMBENTUK SUDUT TERHADAP BIDANG PADA MINYAK SILIKON Anggraeni, Nurlaila Putri Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Wardaya, Asep Yoyo Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Muhlisin, Zaenul Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro lucutan korona, konfigurasi elektroda Dua Pisau, kurva karakteristik I-V, minyak silikon Telah dilakukan penelitian mengenai karakterisasi pembangkitan lucutan korona arus DC negatif dengan  konfigurasi  elektroda  Dua  Pisau  yang  membentuk  sudut  terhadap  bidang  pada  minyak silikon. Tujuan dari penelitian ini adalah memperoleh dan mengetahui karakterisasi pembangkitan lucutan korona arus DC Negatif dengan konfigurasi elektroda Dua Pisau yang membentuk sudut terhadap bidang pada minyak silikon dengan membuat analisis kurva karakterisasi I-V, membuat analisis  lubang  pada  minyak  silikon,  dan  analisis  bentuk  lucutan  korona  elektroda  Dua  Pisau. Penelitian menggunakan 2 variasi yaitu variasi sudut ketajaman  (sudut 30°, 45°, dan 60°), dan variasi  jarak  (1cm  dan  2cm).  Hasil  penelitian  pada  kurva  I-V  menunjukkan  bahwa  kuat  arus bertambah  sejalan  dengan  bertambahnya  tegangan.  Pada  elektroda  Dua  Pisau  analisis  lubang pada minyak silikon membentuk 2 bulatan penuh menyerupai angka delapan. Pada analisis bentuk lucutan korona, lucutan korona berbentuk hanya titik berwarna cerah. BERKALA FISIKA 2022-06-13 14:40:23 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/46856 BERKALA FISIKA; Vol 25, No 1 (2022): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/6181 2014-02-14T09:56:03Z berkala_fisika:RA

nmb a2200000Iu 4500 "131001 2013 eng " 1410-9662 dc SISTEM AKUISIS DATA KOMPUTER PADA SENSOR ULTRASONIC RANGER UNTUK PENGUKURAN LEVEL MUKA AIR Suryono, Suryono Lab. Instrumentasi dan Elektronika, Jurusan Fisika, Universitas Diponegoro Semarang Surarso, Bayu Lab. Matematika Terapan, JurusanMatematika, Universitas Diponegoro Semarang Saputra, Ragil Lab. Komputer, Prodi Teknik Informatika, Fakultas Universitas Diponegoro Semarang This paper describes the method of ultrasound ranger development, data acquisition system and its characteristic than applied for automation water level distance measurement system using personal computer. This system is very important for recorded of water level data acquisition inlong time so data communication at measurement system.The system consist of ultrasonic distance sensor, microcontroller for time-of-flight counter and   serial interface,  and computer system fordata acquisition system. The microcontroller drive of sensor for generate of burst pulse. The 16-bitof counter of  microcontroller  was used for time-of-flight counter. Data was transmitted tocomputer twice at 8-bit of counter register. The microcontroller transmitted data at 9600 BPSusing UART protocols and slave-master for serial communication system. The communicationsystem was connected at voltage level communication RS232. The computer application of dataacquisition system was connected at COM port using Cport pellete in Borland Delphi. Thecollected data calibrated using standard.  The result of system characterization  have highmeasurement stability system at 99,61%, range of measurement distance at 10 cm to 280 cm,linear correlation with standard measurement at R = 0,9999, so it good for more application. Keywords : distance, pulse, counter, serial communication BERKALA FISIKA 2014-02-10 09:02:33 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/6181 BERKALA FISIKA; Vol 16, No 4 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3056 2012-04-07T08:41:37Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Sifat Optis Aktif Air dalam Medan Magnet pada Frekuensi Resonansi 50Hz-60Hz Firdausi, K. Sofjan Laboratorium Optoelektronik & Laser, Jurusan Fisika FMIPA UNDIP Lego, Dro Dwi Laboratorium Optoelektronik & Laser, Jurusan Fisika FMIPA UNDIP Sugito, Heri Laboratorium Optoelektronik & Laser, Jurusan Fisika FMIPA UNDIP The interaction between external magnetic field modulated at 50-60 Hz and the dipoles of the sample induced by laser light modulated at 50-100 Hz has been studied. The magnetic field has the maximum value of 170 mT produced by a coil of 810 in turns. The source of light of 632,8 nm and 532 nm is modulated at the resonance value between 30 Hz and 100 Hz. The optical characteristic behavior studied in this research is the change of polarization E-direction of laser light in the aquades samples against the influence of external magnetic field. The result of experiment indicates that the change of laser polarization angle is linearly proportional with the increaseasing of modulated frequency and external magnetic field in sample materials. It is shown that the change of glycerine concentration changes also linearly direction of polarization. The verdet constants measured in the experiment for 632 nm and for 532 nm equal to (0,026 ± 0,005) V (min/g-cm) and (0,025 ± 0,003) V (min/g-cm), respectively. Key words: change of polarization, external magnetic fields, resonance frequency BERKALA FISIKA 2012-04-06 10:17:20 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3056 BERKALA FISIKA; Vol 10, No 3 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2703 2012-03-29T15:32:53Z berkala_fisika:RA

nmb a2200000Iu 4500 "120328 2012 eng " 1410-9662 dc Kajian Proses Sterilisasi Media Jamur Tiram Putih Terhadap Mutu Bibit Yang Dihasilkan Desna, Desna Departemen Fiska, FMIPA Institut Peranian Bogor, Jl. Meranti gedung FMIPA, Kampus Dramaga, Bogor 16680 Puspita, R. D. Departemen Fiska, FMIPA Institut Peranian Bogor, Jl. Meranti gedung FMIPA, Kampus Dramaga, Bogor 16680 Darmasetiawan, H. Departemen Fiska, FMIPA Institut Peranian Bogor, Jl. Meranti gedung FMIPA, Kampus Dramaga, Bogor 16680 Irzaman, Irzaman Departemen Fiska, FMIPA Institut Peranian Bogor, Jl. Meranti gedung FMIPA, Kampus Dramaga, Bogor 16680 Siswadi, Siswadi Departemen Matematika, FMIPA Institut Peranian Bogor, Jl. Meranti gedung FMIPA, Kampus Dramaga, Bogor 16680 Sterilization media were done in drum. Fuels LPG.is used for the fuel Efficiencies of the fuel gained in the media sterilization oyster mushrooms for 6 hours is 40.74%, meanwhile efficiencies of the fuel for 8 and 10 hours is 59.57% and 53.14%. The physical and economical research of the white oyster mushrooms sterilization process for 8 hours produces the highest efficiency.   Keywords: Medium, oyster mushrooms, LPG, sterilization   BERKALA FISIKA 2012-03-28 21:38:25 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2703 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/54923 2023-06-01T04:13:32Z berkala_fisika:ART

nmb a2200000Iu 4500 "230601 2023 eng " 1410-9662 dc PENENTUAN KESERAGAMAN RESPON DAN FAKTOR KOREKSI TLD – 100 (LiF:Mg,Ti) TERHADAP RADIASI SINAR-X Nurulita, Syaphira Faza Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, 50275, Semarang, Jawa Tengah Budi, Wahyu Setia Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, 50275, Semarang, Jawa Tengah Hidayanto, Eko Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, 50275, Semarang, Jawa Tengah Nuraeni, Nunung Pusat Riset Teknologi Keselamatan, Metrologi, dan Mutu Nuklir, Badan Riset dan Inovasi Nasional, 12440, Jakarta Selatan, DKI Jakarta Uniformity, Correction Factor, X-Ray, TLD-100 (LiF:Mg,Ti) One  of  the  body  tissues  of  radiation  workers  that  is  very  sensitive  to  exposure  to  X-ray radiation  is  the  eye  lens.  Damage  experienced  by  the  lens  of  the  eye  exposed  to  X-ray radiation  can  develop  until  blindness  occurs  due  to  cataracts.  The  use  of  a Thermoluminescence  Dosemeter  (TLD)  can  control  the  external  radiation  dose  received  by the  eyepiece  of  radiation  workers.  In  this  study  there  are  several  objectives,  namely  to determine  the  uniformity  of  the  response  to  TLD-100  (LiF:Mg,Ti)  to  determine  the characteristics of TLD-100 (Lif:Mg,Ti) which is used to measure the radiation dose of the eye lens  and  determine  the  TLD-100  correction  factor  on  X-ray  radiation  to  obtain  an  accurate dose  of  TLD-100  readings  in  the  eyepiece.  The  determination  of  the  uniformity  of  reading response and correction factor of TLD-100 (LiF:Mg,Ti) was carried out on the surface of the water  phantom  using  conventional  X-ray  radiation  sources  with  variations  in  voltage (60;70;80) kV at a distance of 100 cm and a wide field. used is 26 x 26 cm. From the results obtained for determining the uniformity of the response of TLD-100 at voltage (60;70;80) kV using  Statistical  Process  Control  (SPC)  analysis  it  can  be  concluded  that  TLD-100  has  a uniform response because it is between the Lower Warning Limit (LWL) and Upper Warning Limit  (UWL).  However,  according  to  ISO  21909  at  a  voltage  of  60  kV  it  is  necessary  to  re- illuminate  because  the  response  variation  value  obtained  is  40.95%  exceeding  the  specified response variation value limit which is not more than 20% while at a voltage of 70 kV with a response  value  of  20.05%  and  80  kV  with  a  response  variation  value  of  13.93%  did  not exceed  the  predetermined  limits  while  the  results  of  determining  the  TLD-100  correction factor (LiF:Mg,Ti) for each voltage decreased in the range of 0.753 to 0.576. The correction factor at a voltage of 60 kV to 80 kV does not reach the ideal correction factor because the voltage  used  for  calibration  uses  low  energy  while  the  calibration  used  is  for  calibration  at high voltages. BERKALA FISIKA 2023-06-01 04:13:31 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/54923 BERKALA FISIKA; Vol 26, No 1 (2023): Berkala Fisika eng Copyright (c) 2023 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/7388 2014-09-24T09:09:09Z berkala_fisika:RA

nmb a2200000Iu 4500 "140401 2014 eng " 1410-9662 dc ANALISIS DISTRIBUSI TEMPERATUR PERMUKAAN TANAH WILAYAH POTENSI PANAS BUMI MENGGUNAKAN TEKNIK PENGINDERAAN JAUH DI GUNUNG LAMONGAN, TIRIS-PROBOLINGGO, JAWA TIMUR Nur Faridah, Sri Ana Jurusan Fisika Fakultas Sains dan Teknologi Universitas Islam Negeri (UIN) Maulana Malik Ibrahim Malang Krisbiantoro, Agus Jurusan Fisika Fakultas Sains dan Teknologi Universitas Islam Negeri (UIN) Maulana Malik Ibrahim Malang Geothermal is a good alternative energy for this country. Are on track the ring of fire that able to make Indonesia has big and plenitude geothermal reserve. There are 11 regions in East Java that predict as geothermal prospect’s regions. Mount Lamongan’s region, Tiris- Probolinggo, East Java is the object of this research. The existence of geothermal in a region can identify with the surface manifestation, such as hot spring, fumaroles, geyser, hot mud, etc. Remote sensing technique can be use for identifying the indication of geothermal potency from the land surface temperature in the research region. Data analysis from Landsat 7 ETM+ path/row 118/65 (in 6 band thermal) in 2010-2013, it will describe of land surface temperature of geothermal prospect in study area. The result of land surface temperature showed that there is a heat distribution in the study area where the temperature ranges from 37oC up to 67oC, and it is alleged indication of geothermal. Therefore, it is interesting to study as the first step to explore geothermal safe and easy. Keywords: geothermal potency, land surface temperature, remote sensing, Landsat 7 ETM+ imagery, mount Lamongan. BERKALA FISIKA 2014-09-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/7388 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 2 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3072 2012-04-07T08:51:56Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Penentuan Kandungan Unsur Aluminium, Mangan dan Silikon dalam Air Sungai Code Terhadap Waktu Sampling dengan Metode AANC Hanim, Alfia Jurusan Fisika FMIPA UNDIP Azam, Much. Jurusan Fisika FMIPA UNDIP Hidayanto, Eko Jurusan Fisika FMIPA UNDIP Nuraini, Elin P3TM - BATAN An element determination which implied in river Code water below dr. Sardjito brigde with time variation was carried out using fast neutron analysis activation. Water river had been taken away from some dot later mixed, condensed by using an electrical stove from 500 ml to 7 ml. The sample then were iradiated by 14 MeV neutron from neutron generator and then were analyzed by gamma spectrometries.  The qualitative results shown that samples contents Al, Mn and Si. The quantitatively rate of element for aluminium is between 39,50-128,43 ppm, mangan between 71,54-182,80 and silicon between 19,12-84,53 ppm. Key words: FNAA, analysis element contents, Neutron Generator BERKALA FISIKA 2012-04-06 10:17:48 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3072 BERKALA FISIKA; Vol 10, No 1 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2812 2012-03-29T15:28:20Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Quantitative Elemental Analysis of Alkaline Metals in Environmental Samples using Liquid Electrode Plasma Optical Emission Spectrometer Hidayanto, Eko Department of Physics, Diponegoro University, Semarang, Indonesia. Yamamoto, Takashi Department of Materials Science and Engineering, Kyoto University,, Japan. Kawai, Jun Department of Materials Science and Engineering, Kyoto University,, Japan. Element in bottle drinking water, 100% orange juice and coffee and unknown element and concentration in environmental sample were quantitatively analyzed using a portable elemental analyzer of liquid electrode plasma optical emission spectrometer. In order to carry out this purpose, calibration of known element sample was firstly prepared by measuring its emission intensity in various concentrations. Sodium and potassium were commonly detected by this spectrometer, however other elements such as calcium and magnesium were not detected due to the minimum detection limit. The detected element by this portable analyzer shows that its accuracy is enough for quantitative analysis of environmental samples. BERKALA FISIKA 2012-03-29 09:48:12 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2812 BERKALA FISIKA; Vol 12, No 2 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/70148 2025-01-10T06:52:54Z berkala_fisika:ART

nmb a2200000Iu 4500 "240717 2024 eng " 1410-9662 dc PENGARUH TIME REPETITION DAN ECHO TRAIN LENGTH DALAM FAST SPIN ECHO TERHADAP SIGNAL TO-NOISE RATIO Rifaldi, Rifaldi Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin Dewang, Syamsir Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin Astuty, Sri Dewi Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin Arty, Nindy Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin Purwanto, Purwanto Program Studi Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin Time Repetition (TR), Echo Train Length (ETL), Fast Spin Echo (FSE), Signal to-Noise Ratio (SNR), Magnetic Resonance Imaging (MRI) Magnetic Resonance Imaging (MRI) adalah salah satu modalitas pencitraan medis yang menggunakan medan magnet dan gelombang radio untuk menghasilkan gambar organ dan jaringan tubuh. Salah satu teknik MRI yang sering digunakan adalah Fast Spin Echo (FSE) sequence. FSE sequence memiliki beberapa kelebihan dibandingkan dengan sekuens MRI lainnya, yaitu waktu akuisisi yang lebih cepat dan artefak yang lebih sedikit. Tujuan penelitian ini adalah untuk mengetahui pengaruh nilai Time Repetition (TR) dan Echo Train Length (ETL) dalam sekuens Fast Spin Echo (FSE) terhadap nilai Signal to-Noise Ratio (SNR). Penelitian ini menggunakan metode eksperimen dengan variasi nilai TR (600 ms, 1200 ms, 1800 ms, 2400 ms, 3000 ms dan 3600 ms) dan ETL (4, 8, 12, 16, 24, 28, dan 32) pada phantom MRI. Nilai SNR diukur pada setiap variasi TR dan ETL. Hasil penelitian menunjukkan bahwa nilai SNR meningkat dengan peningkatan nilai TR dan penurunan nilai ETL. Hal ini disebabkan oleh semakin lama waktu relaksasi T1 jaringan, semakin tinggi sinyal yang dihasilkan. Sedangkan semakin pendek ETL, semakin sedikit artefak yang dihasilkan, sehingga SNR semakin tinggi. TR dan ETL memiliki pengaruh yang signifikan terhadap nilai SNR dalam FSE sequence. Pemilihan nilai TR dan ETL yang optimal dapat meningkatkan kualitas gambar MRI dengan SNR yang tinggi. BERKALA FISIKA 2025-01-08 09:35:44 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/70148 BERKALA FISIKA; Vol 27, No 2 (2024): Berkala Fisika eng Copyright (c) 2025 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/9385 2015-11-05T11:03:32Z berkala_fisika:RA

nmb a2200000Iu 4500 "150102 2015 eng " 1410-9662 dc PENGARUH ADITIF BaCO3 PADA KRISTALINITAS DAN SUSEPTIBILITAS BARIUM FERIT DENGAN METODA METALURGI SERBUK ISOTROPIK Nugraha, Priska R. Jurusan Fisika, FakultasMatematika dan Ilmu Pengetahuan Alam, UNSOED, Purwokerto Widanarto, Wahyu Jurusan Fisika, FakultasMatematika dan Ilmu Pengetahuan Alam, UNSOED, Purwokerto Cahyanto, Wahyu Tri Jurusan Fisika, FakultasMatematika dan Ilmu Pengetahuan Alam, UNSOED, Purwokerto Kuncoro, Handoko S. Sarana Riset Keramik Maju, Gelas dan Email – Balai Besar Keramik, Bandung Barium hexaferrites, isotropic powder metallurgy, crystal characterizations, permanent magnets Influences of concentration of BaCO3 on crystallinities and susceptibilities of barium ferrites using isotropic powder metallurgy method of fabrication is studied based on the characterization of X-Ray Diffraction (XRD), crystallite size distributions and hysteresis curve of Vibrating Sample Magnetometer (VSM).  In this study, Fe2O3 of Cilacap iron sands are doped with BaCO3 with various concentrations of 15%, 30% and 45% at 1100 °C of sintering temperature.  The results show that the addition of BaCO3 affects the formation of the multi-phase barium ferrite crystals and widen the crystallite size distribution, as well as lowering the saturations and the magnetic remanences. The optimum composition for barium ferrite magnets is obtained for 15% of BaCO3, with the highest mass susceptibility of 2.4 × 10-6 M3/Kg. Keywords: Barium hexaferrites, isotropic powder metallurgy, crystal characterizations, permanent magnets BERKALA FISIKA 2015-11-05 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/9385 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 1 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3089 2012-04-07T12:35:37Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Penggambaran Pseudosection Bawah Permukaan dari Suatu Proses Evapotranspirasi Tanaman Jagung Menggunakan Program RES2DINV Suroso, Teguh Laboratorium Geofisika Jurusan Fisika FMIPA Undip Yulianto, Tony Laboratorium Geofisika Jurusan Fisika FMIPA Undip Yulianto, Gatot Laboratorium Geofisika Jurusan Fisika FMIPA Undip The dipole-dipole investigation of one line corn crop subsurface condition have been done in relationship with evapotranspiration process. The variation of subsurface resistivity investigation occured by the caused of evapotranspiration process.The space of dipole-dipole array measured in 0,20 meter and 0,40 meter with n value  from 1 to 4. In May 21st,24th,28th,31st 2005 the dipole-dipole array was measured. The electrodes and  corn crop-line  possition is parallel. The depiction of subsurface condition viewed by using the Res2Dinv apparent resistivity data. The depiction showed the high resistivity of the corn crop area and the transpiration process is higher than evaporation process. Anomaly resistivity value in the pseudosection output  is 54,30 Wm. Keywords: dipole-dipole, evapotranspiration, resistivity BERKALA FISIKA 2012-04-06 10:20:34 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3089 BERKALA FISIKA; Vol 9, No 3 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2874 2012-03-29T14:25:06Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc PENGARUH PENAMBAHAN POLIMER EMULSI VINYL ACECATE CO ACRYLIC PADA TANAH LEMPUNG TERHADAP UJI PERMEABILITAS MELALUI CONSTANT HEAD PERMEABILITY TEST Halauddin, Halauddin Jurusan Fisika, Fakultas MIPA - Universitas Bengkulu Suhendra, Suhendra Jurusan Fisika, Fakultas MIPA - Universitas Bengkulu Permeability is rate of movement an fluid in soil through a media  have relation pore micro and macro way, happen of vertical and horizontal. Permeability of soil depend on pore mean size measure influenced by particle size measure distribution, viscosity, particle form and soil structure. Smaller soil particle size measure, smaller also pore size measure and progressively lower ability of the soil to overcome fluid. This research aim to know the level of permeability coefficient value of soil residing in gristle area slide by pass Bengkulu Kepahiang by using method permeameter of permeability head constant by comparing given by permeability value is emulsion polymer and do not give by type emulsion polymer of  poly vinyl acetate co acrylic (PVA). This research have done in laboratory have the character of pure experiment and conducted sometime. From result of research, obtained that: value permeability of biggest soil before given by emulsion polymer of PVA there are at location III equal to 8,62.10-3 cm/s, and value permeability of smallest soil before given by emulsion polymer there are at location I equal to 3,87.10-3 cm/s. While value permeability of biggest soil after given by emulsion polymer of PVA there are at location V equal to 0,96.10-3 cm/s, and value permeability of smallest soil after given by emulsion polymer there are at location IX equal to 0,10.10-3 cm/s.   Keywords: Permeability, constant head permeability, pore of size,  polymer of emulsion and                     poly vinyl acetate co acrylic (PVA). BERKALA FISIKA 2012-03-29 11:12:16 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2874 BERKALA FISIKA; Vol 14, No 2 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/12802 2016-12-16T09:42:33Z berkala_fisika:RA

nmb a2200000Iu 4500 "151001 2015 eng " 1410-9662 dc REVIEW OF A SIMPLE POWERFUL POLARIZER FOR TESTING OF EDIBLE OIL QUALITY Firdausi, Ketut Sofjan Jurusan Fisika, Universitas Diponegoro, Semarang Rahmawati, Henik Jurusan Fisika, Universitas Diponegoro, Semarang polarization, oil quality, saturated fatty acid In this paper, we have shown that a simple pair of polarizer can be used to measure natural optical activity in total complex oil (vegetable oil and fats). A similar concept with quantum physics has been discussed to describe briefly the probability in finding a particle within certain region with the change of polarization due to the interaction light with saturated fatty acids. The light source was fluorescence lamp and the experimental condition was kept stable, i.e. constant temperature and constant humidity. The angle of polarization was measured repeatedly until 50 times. Our relative uncertainty measurement has been obtained up to 5% and this is obviously clear to be able to differentiate various different quality of oil. More important result is that ordinary light polarization can be used as powerful test to show various quality level of oils better than recent standard methods. A good prospect has also been obtained for halal level testing. It is found that average value of polarization in lard (pig oil) is relatively higher than the others. Keywords: polarization, oil quality, saturated fatty acid BERKALA FISIKA 2016-12-16 09:09:59 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/12802 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 4 Tahun 2015 eng Copyright (c) 2016 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/3105 2012-04-07T12:41:59Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc PENGARUH POLARITAS MEDAN LISTRIK EKSTERNAL DAN SUDUT POLARISASI LASER DIODA UNTUK PENGAMATAN EFEK KERR Wibowo, Hari Jurusan Fisika FMIPA Universitas Diponegoro, Semarang Indonesia Sugiyanto, Eko Jurusan Fisika FMIPA Universitas Diponegoro, Semarang Indonesia Firdausi, K. Sofjan Jurusan Fisika FMIPA Universitas Diponegoro, Semarang Indonesia Marhaendrajaya, Indras Jurusan Fisika FMIPA Universitas Diponegoro, Semarang Indonesia An identification of non linear optics of some material has been carried out. The samples used here are mineral water, salt solution, and sugar solution for various concentrations. A static applied external field E is adjusted to left and right direction. And also, the direction of electric field of laser is varied against E. The magnitude of E used in the experiment is produced by a DC high voltage (0-10 kV) applied on two identical parallel plates. A source of light to the samples is a diode laser of 645 nm and 5 mW. The change of polarization angle of laser b after through the samples is the optical property to be identified. Both of mineral water and salt solution, the effect of polarity of E shows identical results of b vs. E. In case of sugar solution, we obtain a positive gradient for right polarity and negative gradient for left polarity of E. Key words: non linear optics, polarization, polarization angle, Kerr Effect BERKALA FISIKA 2012-04-06 10:20:14 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3105 BERKALA FISIKA; Vol 9, No 1 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2927 2012-03-30T14:15:17Z berkala_fisika:EDT

nmb a2200000Iu 4500 1410-9662 dc Cover Januari 2009 Januari 2009, Cover Cover Berkala Fisika Januari 2009 BERKALA FISIKA 2012-03-29 14:56:20 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2927 BERKALA FISIKA; Vol 12, No 1 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/25476 2019-09-17T16:39:09Z berkala_fisika:EDT

nmb a2200000Iu 4500 "190917 2019 eng " 1410-9662 dc MEYIAPKAN DOKUMEN ILMIAH UNTUK PUBLIKASI DI JURNAL Anam, Choirul Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang MEYIAPKAN DOKUMEN ILMIAH UNTUK PUBLIKASI DI JURNAL BERKALA FISIKA 2019-09-17 16:39:09 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/25476 BERKALA FISIKA; Vol 22, No 3 (2019): Berkala Fisika Vol. 22 No. 3 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4983 2013-05-27T14:18:31Z berkala_fisika:RA

nmb a2200000Iu 4500 "120401 2012 eng " 1410-9662 dc PERUBAHAN BUTIR DAN PENENTUAN TEMPERATUR PEMBENTUKAN BARIUM HEXAFERRITE TERSUBSTITUSI ION Mn+2 Dan Ti+4 MELALUI MEKANISME MEKANIKA MILLING Priyono, Priyono Laboratorium Fisika Material, Jurusan Fisika Fakultas Sains dan Matematika Universitas Diponegoro Manaf, A Program Studi Ilmu Material, Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia Abstract Ferrite as magnetic material has been exploited for various the application for exampleas electronic peripherals and optic like hard magnetic also soft magnetic materials. For theapplication of high frequency usually exploited as circulator, phase shifter and absorber and antidetection material. In research has been done synthesis and characterization of sewer structuresnanocristall barium phase hexaferrite substitution is partial with ion Manganese and Titaniumthrough mechanics engineering alloy. Indicated that monophase formation of Barium Hexaferriteis substitution by Mn+2 and Ti+4 happened at growth temperature above 7500 C. At low relativetemperature 5000 C and 750 0 C , 8500 C and 10000 C  result of plant from mechanics processalloy is not happened formation of phase, but only experiences recrystallization to returnfollowed with magnification growth of grain its. Above heating 7500 C plant grain desisted andhappened orthogonal transformation of off the cuff phase towards formation of bariumhexaferrite substitution by Mn+2 and Ti+4 ions. In research is not found existence of intermediatephase during formation of the phase Keywords: recrystalization, high frequency, intermediate phase, ferrites BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4983 BERKALA FISIKA; Vol 15, No 2 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2975 2012-04-03T11:50:11Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Sifat Optis Tak-Linear Pada Material KDP Setyawan, Rahmadi Jurusan Fisika Universitas Diponegoro Setiawati, Evi Jurusan Fisika Universitas Diponegoro Marhaendrajaya, Indras Jurusan Fisika Universitas Diponegoro Firdausi, K. Sofjan Jurusan Fisika Universitas Diponegoro Non-linier optical properties of transparent material Kalium Di- hydrogen Phosphate (KDP) have been identified under the influence of external magnetic fields at wavelength 632.8 nm and 532 nm by using Faraday Effect method. The external  magnetic fields used in this experiment is produced from coils with total turns of 810, wire diameter of 0,8 mm, and soft magnet core, and is flowed by maximum AC current 5 A. The magnitude of magnetic fields can be produced is 194.23 mT. The optical property measured here is rotation of polarization angle ß of the laser beam after passed the transparent material. From the experiment, it is obtained Verdet’s constant value for transparent material KDP is (12.60 ± 0.59) min/G-cm at  = 632.8 nm and (14.93 ± 0.73) min/G-cm at  = 532 nm.   Key words: non-linier optic, KDP, magnetic fields, polarization, Verdet’s constant BERKALA FISIKA 2012-03-30 15:00:48 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2975 BERKALA FISIKA; Vol 11, No 3 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/4994 2013-05-27T16:00:23Z berkala_fisika:RA

nmb a2200000Iu 4500 "121001 2012 eng " 1410-9662 dc IDENTIFIKASI DAN PERANCANGAN PENGENDALI PID MENGGUNAKAN PENDUGA ARX TERHADAP SISTEM PEMANAS UDARA DENGAN KRITERIA ISE, IAE, ITSE DAN ITAE Khuriati RS, Ainie Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro. In this paper ARX estimation methodology used to design a PID controller  for  temperature control of the air heater. The step input applied  on heating systems and logging the data   to MATLAB via a data acquisition system. The data obtained is used to identify the model ofthe process in the form of ARX estimator. PID parameters obtained by minimising the  standard errors integral(IAE, ISE, ITSE and ITAE). Keywords: PID controller, Tuning, ARX Identication, Error Integral ,and air heater BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4994 BERKALA FISIKA; Vol 15, No 4 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2994 2012-04-03T15:26:44Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Rancang Bangun Spektroskopi FTIR (Fourier Transform Infrared) untuk Penentuan Kualitas Susu Sapi Endro Suseno, Jatmiko Lab. Elektronika & Instrumentasi, Jurusan Fisika FMIPA UNDIP Firdausi, K. Sofjan Lab. Optoelektronika & Laser, Jurusan Fisika FMIPA UNDIP A Fourier Transform Infrared spectroscopy instrument has beed developed in the range middle infrared. The important instrument in this research is to make interferogram using He-Ne Laser based on Michelson interferometer. The result indicates that the interferogram seems work well and should give some spectra in the range of middle infrared frequencies. Key words: FTIR, interferogram, spectroscopy BERKALA FISIKA 2012-04-03 11:53:14 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2994 BERKALA FISIKA; Vol 11, No 1 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/34360 2020-11-22T18:12:16Z berkala_fisika:ART

nmb a2200000Iu 4500 "200731 2020 eng " 1410-9662 dc ELECTROOPTIC CHARACTERISTICS OF COLLOIDAL SILVER SOLUTIONS USING TRANSVERSE ELECTROMAGNETIC MODE OF INCOMING LIGHT Firdausi, K. Sofjan Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Setyoningrum, Aqilatul F.D. Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Tiwiyaningsih, Tiwiyaningsih Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Rahmawati, Aidah Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Richardina, Very Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Khumaeni, Ali Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Sugito, Heri Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Soesanto, Qidir M.B Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Azam, Much Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang In this paper, we demonstrated new electro-optics characteristics of silver nanoparticle solution (NPP) using  linear  light  polarization.  The  electro-optical  properties  of  NPP  solution  were  obtained  by measuring changes in the polarization of light in the transverse electromagnetic (TEM) mode, in which the  source  light  is  made  linearly  polarized  at  0˚  and  90˚to  the  axis  of  polarizer.  NPP  samples  were obtained by laser ablation method and electro-optical properties were obtained through high voltage DC 0-9 kV with light source from green laser pointer (532 nm). The results showed that colloidal silver solution  in water  at  an angle  mode  of  0˚,  strongly  suspected  to  show  active  Plasmon  resonance at a concentration area of 3-5 ppm, with a peak of polarization at a concentration of 4.6 ppm. In the 90˚ mode, it is assumed that the colloidal silver solution is resonant inactive, the change in polarization is caused  only  by  a  combination  of  natural  polarization  and  electro-optical  polarization.  The  study  of changes in the polarization of light through electro-optical effects on silver solutions is very interesting to  be developed  further  using other  particles,  because  it  can provide  a  more  comprehensive  answer. This method also contributes science to the new  perspective of understanding the interaction of light with matter, especially colloidal silver solutions, and the like. Keywords: Light polarization, electro-optics effect, colloidal silver solution  BERKALA FISIKA 2020-11-22 17:41:26 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/34360 BERKALA FISIKA; Vol 23, No 3 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5010 2013-05-27T16:22:47Z berkala_fisika:RA

nmb a2200000Iu 4500 "110701 2011 eng " 1410-9662 dc PEMBUATAN SOFTWARE MONITORING JUMLAH PRODUKSI KERUPUK MENGGUNAKAN BORLAND DELPHI 7.0 Adiyani C, Mirsari Jurusan Fisika FMIPA Universitas Diponegoro Danusaputro, Hernowo Jurusan Fisika FMIPA Universitas Diponegoro The monitoring program for the crackers counter has been done by Borland Delphi 7.0. The results of this program is intended to help the manager’s job in monitorin the amount ofcracker produced by industry. This program using Borland Delphi 7.0. While to find out the cracker pieces which fellfrom the conveyor using photodiodes sencors and lasers as light sources directed at the sensorphotodiodes. When the sencor detected a cracker pieces which fell from the conveyor, the sensorsend a signal to the microcontroller for processing and then send to computer via serialcommunication. On computer, that data is received by Borland Delphi 7.0 program to displayedand stored in Microsoft Access. The system has been realized successfully and can printer the data stored in databases sothat the amountof crackers produced will be known. Keyword: Crackers, Borland Delphi 7.0, Microsoft Access, photodiodes sencors, lasers BERKALA FISIKA 2013-05-27 13:55:05 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5010 BERKALA FISIKA; Vol 14, No 3 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3034 2012-04-06T07:42:25Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Tungku Sekam Sebagai Bahan Bakar Alternatif Pada Sterilasasi Media Jamur Tiram Puspita, R. D. Departemen Fiska, FMIPA, Institut Peranian Bogor Desna, Desna Departemen Fiska, FMIPA, Institut Peranian Bogor Husin, A.D. Departemen Fiska, FMIPA, Institut Peranian Bogor Irzaman, Irzaman Departemen Fiska, FMIPA, Institut Peranian Bogor Darmasetiawan, H. Departemen Fiska, FMIPA, Institut Peranian Bogor Siswadi, Siswadi Departemen Matematika, FMIPA, Institut Pertanian Bogor Medium Sterilization which has been packaged in the baglog on the oyster mushroom cultivation, one of them can be done with a steam technique using the drum. Commonly used fuel is firewood that could be assisted by using coal or kerosene or LPG gas. Rice husk as alternative fuel of kerosene and firewood can be used as fuel for the medium sterilization. The husk which used in the sterilization process of oyster mushrooms medium for 6 hours, 8 hours, and 10 hours as much as 55.5 kg, 60 kg and 67 kg. The efficiency which obtained in the medium sterilization of oyster mushrooms with using rice husk is reached 45.23% in the medium sterilization for 8 hours.   Keywords: Medium, oyster mushrooms, rice husk, sterilization BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3034 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/44183 2022-01-16T05:28:56Z berkala_fisika:ART

nmb a2200000Iu 4500 "220116 2022 eng " 1410-9662 dc ANALISIS PERBANDINGAN DIAGNOSTIC REFERENCE LEVEL (DRL) MODALITAS CT SCAN SEBAGAI UPAYA OPTIMASI PROTEKSI DAN KESELAMATAN RADIASI DI BERBAGAI NEGARA Duandini, Ega Departemen Fisika, Universitas Diponegoro Semarang Etika, Eva Anggun Departemen Fisika, Universitas Diponegoro Semarang Nurulita, Syaphira Faza Departemen Fisika, Universitas Diponegoro Semarang Hidayanto, Eko Departemen Fisika, Universitas Diponegoro Semarang radiation, CT Scan, patient doses, diagnostic reference level (DRL) Computed  Tomography  (CT)  Scan  had  grown  since  its  first  discover  at  1972.  Now,  CT  Scan  is the  most  capable  radiodiagnostic  modality  for  detecting  human  anatomy  in  a  short  time. However, CT Scan has the highest dose among another radiodiagnostic modalities. If radiation dose  exposure  exceeds  the  limit,  it  will  cause  any  serious  disease,  such  as  cancer.  Based  on Mathews  et  al  research  in  Australia,  in  2016,  there  are  3150  from  680211  cancer  patient  ever exposured by CT Scan one year before. From the research,  it is known that there is effect after exposured  by  CT  Scan.  Therefore,  supervision  is  needed  in  an  effort  to  ensure  protective efficiency  and  safety  of  radiation  against  radiation  workers,  patients  and  communities,  among them with the diagnostic reference level (DRL). The DRL is the value of a dose or rate of dosage or  activity  established  by  a  data  dose  or  rate  of  dosage  or  activity  that  X-ray  medical examinations  result  from  each  type  of  examination.  The  value  of  the  DRL  is  recommended  on quartile  3  (75  percentiles)  of  a  fragmented  dose  data  obtained  from  the  median  value.  This research  focused  on  the  CT  scan  modality  for  inspection.  And  obtained  CTDIvol  and  DLP grades.  In  this  research,  obtainer  DRL  value  for  CT  Chest  10.99  mGy  CTDIvol  and  411.71 mGy.cm DLP, and for CT Abdomen 17.84 mGy CTDIvol and 1298.58 mGy.cm DLP. BERKALA FISIKA 2022-01-16 05:28:56 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/44183 BERKALA FISIKA; Vol 24, No 3 (2021): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/6176 2014-02-10T09:35:59Z berkala_fisika:RA

nmb a2200000Iu 4500 "131001 2013 eng " 1410-9662 dc KORELASI NILAI TIME REPETITION (TR) DAN TIME ECHO (TE) TERHADAP SIGNAL TO NOISE RATIO (SNR) PADA CITRA MRI Aji Prastowo, Alan Tanjung Instalasi Radiologi, Rumah Sakit Tlogorejo, Semarang Setiabudi, Wahyu Jurusan Fisika, Universitas Diponegoro, Semarang Anam, Choirul Jurusan Fisika, Universitas Diponegoro, Semarang Effort to obtain a correlation of TR and TE to the value of Signal to Noise Ratio (SNR) in MRI machine has been carried out. In this research used MRI Hitachi Airis II which has a permanentmagnetic field of 0.3 Tesla. Research using a phantom object with Polyethylene Vessel containingNiCl2: 18 mmol/l. Phantom has a tube diameter 165 mm, cap diameter 120 cm and height 320 mm.Image acquisition is done with two TE value of 20 ms and 120 ms, and TR values varied from 100 msto 4000 ms, with the scale of 100 ms. Slice taken with a thickness 5 mm, and in the position 15 cm fromthe bottom of phantom. Region of interest (ROI) in the image is determined at the radius of 65 cm.SNR calculation is then performed for a variety of TE and TR. It was obtained that the SNR valueincreases exponentially for TR value of 100 ms to 700 ms and stabilized at the next TR to 4000 ms. Atthe same TR, SNR value at TE 20 ms greater than the TE 120 ms. At TE 20 ms, TR optimal value forT1WI is at 700 ms, with a SNR value of 57,6 ms, whereas for PD image on TR 3900 ms with a SNR of57,6. At TE 120 ms, TR optimal value for T2WI was at 2200 ms with SNR value of 19. Keywords: Magnetic Resonance Imaging (MRI), Time Repetition (TR), Time Echo (TE), Signal toNoise Ratio (SNR) BERKALA FISIKA 2014-02-10 09:02:33 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/6176 BERKALA FISIKA; Vol 16, No 4 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3051 2012-04-06T20:19:07Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Penentuan Koefisien Linier Elektro Optis Pada Aquades dan Air Suling Menggunakan Gelombang RF Jatwiyono, Lilik Eko Laboratorium Optoelektronik & Laser, Jurusan Fisika, FMIPA, UNDIP Sugito, Heri Laboratorium Optoelektronik & Laser, Jurusan Fisika, FMIPA, UNDIP Firdausi, K. Sofjan Laboratorium Optoelektronik & Laser, Jurusan Fisika, FMIPA, UNDIP The coefficients of electrooptics for water and refinery water in RF field have been determined. The RF frequency range used in the research is 6,04 MHz to 11 MHz. Two different light beam (532 nm and 632,8 nm) have been used to measure the change of light polarization after transmitted the samples. The result indicates that the linear and quadratic electro optic coefficients appear in the range of frequency-field. The refinery water has greater value of linear electro optic coefficient than aquades. It is also obtained that the greatest change of polarization angle take place when using the green laser in the field’s position of upright against the RF frequency field and polarization angle of 900.   Keywords: RF field, polarization angle, linear electro optic coefficient. BERKALA FISIKA 2012-04-06 10:17:07 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3051 BERKALA FISIKA; Vol 10, No 4 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2456 2012-03-29T14:43:26Z berkala_fisika:RA

nmb a2200000Iu 4500 "120319 2012 eng " 1410-9662 dc Analisis Velocity Model Building Pada Pre Stack Depth Migration Untuk Penggambaran Struktur Bawah Permukaan Daerah ”x” Triarto, Yose Rizal Lab. Geofisika Jurusan Fisika UNDIP Semarang Danusaputro, Hernowo Lab. Geofisika Jurusan Fisika UNDIP Semarang Harmoko, Udi Lab. Geofisika Jurusan Fisika UNDIP Semarang Pre Stack Depth Migration method has been carried out for 2D seismic reflection data on Line KPH-11807 at “X” area. This method was chosen for reconstruction geology features and imaging the subsurface structure. Based on previous investigation which done October, 2004-January, 2005, Line KPH-11807 at “X” area was a potential development as hydrocarbon prospect area which complex geology structure and strong lateral velocity variations. In the same area has been done previously with Pre Stack Time Migration by Elnusa Geosains, PT. Therefore the result of the PSDM can be compared to PSTM method. Seismic section with complex geology structure and/or strong lateral velocity variations area, which often there are at seismic data migrated stack can be overcome using an accurate velocity model. Velocity model building with the IVMB (interval velocity model building) concept consist of the coherency inversion and global tomography yield the right subsurface geological model. Hereinafter the velocity model will be used for the PSDM (pre stack depth migration) process. Result of PSDM shows a significant image enhancement, able to assure the reflection pattern at the horizons with strong lateral velocity variations and give the more coherence resolution compared with Pre Stack Time Migration seismic data. This study is very valuable in building exploration concept and development of the area, especially in a complex structure with strong lateral velocity variations.   Keywords: PSDM, velocity model building. BERKALA FISIKA 2010-10-22 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2456 BERKALA FISIKA; Vol 13, No 1 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/50741 2022-12-06T10:03:02Z berkala_fisika:ART

nmb a2200000Iu 4500 "221206 2022 eng " 1410-9662 dc STUDI LITERATUR: PERKEMBANGAN NANOMATERIAL M, Nursanti A Program Studi Magister Fisika, Departemen Fisika, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275 A, Syafira Program Studi Magister Fisika, Departemen Fisika, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275 Priyono, Priyono Program Studi Magister Fisika, Departemen Fisika, Universitas Diponegoro, Jl. Prof. Soedarto, SH, Kampus Undip Tembalang, Semarang, Indonesia 50275 nanomaterial, karakteristik, preparasi, aplikasi pada logam Kajian ini memperkenalkan studi literatur dari perkembangan nanomaterial, baik berupa definisi sejarah, tipe-tipe dimensi penyusun nanomaterial, sifat-sifat yang ada di dalam nanomaterial, karakteristik berupa morfologi dan ukuran partikel dengan menggunakan uji SEM, XRD, TEM. Menjelaskan beberapa metode yang dapat digunakan dalam preparasi nanomaterial baik anorganik dan organik, serta beberapa penerapan aplikasi dalam bidang nanomaterial dengan menggunakan material logam. BERKALA FISIKA 2022-12-06 10:03:02 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/50741 BERKALA FISIKA; Vol 25, No 3 (2022): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/7383 2014-09-24T09:07:26Z berkala_fisika:EDT

nmb a2200000Iu 4500 "140401 2014 eng " 1410-9662 dc Cover, Redaksional dan Petunjuk Penulisan Berkala Fisika Vol. 17 No.2 April 2014 Berkala Fisika, Tim Redaksi Jurusan Fisika Fakultas Sains dan Matematika Universitas Diponegoro Cover, Redaksional dan Petunjuk Penulisan Berkala Fisika Vol. 17 No.2 April 2014 oleh Tim Redaksi BERKALA FISIKA 2014-09-24 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/7383 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 2 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3067 2012-04-07T08:47:10Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc PEMBENTUKAN SIFAT OPTIS AKTIF MENGGUNAKAN MEDAN RADIO FREQUENCY (RF) PADA LARUTAN GARAM Kamil, Ahmad Jurusan Fisika FMIPA Universitas Diponegoro Azam, M. Jurusan Fisika FMIPA Universitas Diponegoro Firdausi, K. Sofjan Jurusan Fisika FMIPA Universitas Diponegoro The non-linear optical property of rotary power of light polarization in water and salt solution has been developed using the Radio-Frequency field (RF-Field). The RF-Field used in the experiment is produced by RF generator, and it supplies the frequency in the range between 6.04 to 14.56 MHz, which then applies to the samples. The source of light with 632.8 nm-wavelength and 532 nm-wave length are used to observe the change of angle polarization of the light, after it passes through the samples. Three modes of the direction of the electric field of light are chosen 0o (E//) (E of light is parallel to E of RF-Field, and 90o (E^) (E of light is perpendicular to E of the RF-Field) in order to determinate the optimal change of the angle of the polarization. The values of  is measured as a function of RF-Field, , where  is the angular frequency of RF-Field and BRF is the magnitude of magnetic field measured in the center of the coil which is assumed to be homogeny in the circumstances of the samples. The results of the experiment show that the degrees of change of the polarization direction, is largest at the  mode. It shows also that at small wavelength of light we obtain the larger, which is indicated the higher frequency of light will more induce the dipoles of molecules of the samples. Keywords: non-linear optics, polarization angle, rotary power BERKALA FISIKA 2012-04-06 10:17:27 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3067 BERKALA FISIKA; Vol 10, No 2 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2794 2012-03-29T12:53:44Z berkala_fisika:RA

nmb a2200000Iu 4500 "120329 2012 eng " 1410-9662 dc Rekontruksi Citra Tomografi Sinar-X Flouresens 2D Berbasis Teknik Radiografi Digital Menggunakan Bahasa Pemrograman Matlab 7.1 M.Si, Sumariyah Laboratorium Elektronika Dan Instrumentasi , Fisika FMIPA UNDIP Muhlisin, Zainul Laboratorium Elektronika Dan Instrumentasi , Fisika FMIPA UNDIP Setiawati, Evi Laboratorium Elektronika Dan Instrumentasi , Fisika FMIPA UNDIP This research has been done Recontructing of  2D X-ray Flouresense Tomographic Imaging Basis on Digital Radiograhy Technique using MATLAB 7.1 Programming  The research uses an unit Computed Radiografi, a rotated obyect and a reconstruction programme imaging. The shape of rotated object is prisma which made of acrylic, lenght 18 cm and  size sisi 6 cm. The prismacan  rotate continue and as cor of the rotatd obyek uss asylinder still. Recontruction 2D tomographic imaging build from 25 rotatd object radiograf imaging result of expose Computed Radiografi with expose factor constant ang interval increasing rotated angle7,50 . The reconstruction programme 2D Tomographic  consist of the cropping programme which produces  25 slice rotatd obyect forming sinogram and the programm Transformation invers Radon. The result of 2D Tomographic reconstruction in this rsearch obtain cross-sectionalprisma imaging is circle in the triangle sisi same imaging  which habrur.           Keywords: recontruction, tomography and radiography BERKALA FISIKA 2012-03-28 21:23:50 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2794 BERKALA FISIKA; Vol 13, No 4 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/70081 2025-01-08T09:17:37Z berkala_fisika:ART

nmb a2200000Iu 4500 "240117 2024 eng " 1410-9662 dc UJI CT NUMBER CITRA FANTOM BERBAHAN DASAR GELATIN DAN KAYU BAKAU (RIZHOPORA SPP) UNTUK APLIKASI OBJEK HATI Saharani, Nanda Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin Dewang, Syamsir Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin Astuty, Sri Dewi Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin Marwah, Siti Ainun Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin Purwanto, Purwanto Instalasi Radiologi, RSUP Wahidin Sudirohusodo, Indonesia CT Scan, Fantom, CTN, CNR, SNR, Rhizophora spp, Gelatin, Polyvinil Alkohol (PVA) CT adalah peralatan diagnostik yang dapat menampilkan citra cross-section dari tubuh   manusia   dengan memanfaatkan  penyerapan  radiasi  sinar-X. Faktor eksposi seperti tegangan tabung merupakan bagian penting pada hasil citra yang diperoleh. Penelitian ini bertujuan untuk mengetahui nilai CT Number dan kualitas citra CT menggunakan fantom buatan. Penelitian ini bertujuan untuk mengetahui nilai CTN dan kualitas citra CT menggunakan fantom buatan. Fantom dibuat dari bahan-bahan alami seperti batang pohon bakau minyak (Rhizophora spp), gelatin, Polyvinil Alkohol (PVA), dan aquades. Citra CT fantom dianalisis dengan parameter CNR dan SNR pada variasi tegangan tabung 70 kV, 90 kV, dan 110 kV. Hasil penelitian menunjukkan bahwa nilai CTN fantom buatan sesuai dengan nilai CTN organ tubuh manusia. Nilai CNR fantom buatan jaringan lunak mengalami penurunan dengan peningkatan tegangan tabung, sedangkan nilai SNR mengalami peningkatan dengan peningkatan tegangan tabung. Kesimpulan, fantom buatan ini dapat digunakan untuk mengetahui nilai CTN dan kualitas citra CT. Namun, perlu diperhatikan bahwa nilai CNR dan SNR fantom buatan jaringan lunak dapat bervariasi tergantung pada tegangan tabung. BERKALA FISIKA 2024-01-20 16:27:18 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/70081 BERKALA FISIKA; Vol 27, No 1 (2024): Berkala Fisika eng Copyright (c) 2025 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/9298 2015-10-19T16:18:29Z berkala_fisika:RA

nmb a2200000Iu 4500 "141001 2014 eng " 1410-9662 dc PERUBAHAN FUNGSI GELOMBANG ELEKTRON PADA MULTIPLE SCATTERING UNTUK SUDUT HAMBUR NOL Guswantoro, Taat Jurusan Fisika, Universitas Diponegoro, Semarang Nur, Muhammad Jurusan Fisika, Universitas Diponegoro, Semarang Gunawan, Vincencius Jurusan Fisika, Universitas Diponegoro, Semarang Multiple scattering in the plasma present doe to movement of charged particle influenced by Coulomb interaction between charged particles in the plasma. Research on multiple scattering among influences of effective field on the multiple scattering, lost energy due to scattering processes, the aims of this study are to determine the scattered wave function, multiple scattering cross-sections and scattered electron energy. The understanding of the electron scattering in the plasma in this study using the optical approximation that is application of wave properties of electron. The calculation of  scattered wave function is using first Born approximation, by taking the scattering potential energy is the summary of potential energy of electron by interaction with each ions that present in the plasma sphere. Electron wave function after scattered is changes, though the direction is same with the direction of initial electron coming, presence a reduction in amplitude as a function of the distance the wave trajectory. Keywords: Multiple Scattering, Plasma, Born approximation. BERKALA FISIKA 2015-10-19 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/9298 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 4 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3083 2012-04-07T12:33:23Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Rancang Bangun Alat Pengukur Densitas Optik Radiograf Sinar-X Digital Sumariyah, Sumariyah Laboratorium Instrumentasi dan Elektronika Jurusan Fisika UNDIP Gunadi, Isnain Laboratorium Instrumentasi dan Elektronika Jurusan Fisika UNDIP Mujib, Syaiful Laboratorium Instrumentasi dan Elektronika Jurusan Fisika UNDIP A digitized X-ray radiograph’s optical density measurer has been designed.  It’s scale work is between  0.00 to  4.42. The main part of  this instrument is an optocopler sensor which will convert the light passing by  to an analog current. An optocopler circuit is a combination of LED as a light source, and a photoresistor as a light sensor. The sensor circuit is combined with a voltage devider circuit so that the voltage caused by the light and the output is work reversely. Besides, it combined with an instrumentation amplifier which amplifies the output voltage of the whole sensor. A decoder then added to the circuit to translate the BCD code to a seven segment display. The related segment, then, turned on according to the magnitude of the output voltage. The last part is a seven segment displayer which displays the measure’s result. According to a testing oxamination, the instrument is able to produce a measurement result till a resolution of 0.01. BERKALA FISIKA 2012-04-06 10:20:46 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3083 BERKALA FISIKA; Vol 9, No 4 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2867 2012-03-29T15:40:30Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Konduktivitas Listrik Pulp Kakao dengan Fermentasi dan Pengenceran Sugito, Heri Jurusan Fisika Universitas Diponegoro Mujasam, Mujasam Jurusan Fisika Universitas Diponegoro Relation between hydrogen ion exponent (acidity) cacao pulp with energy pass electrics (conductivity) checked to know how ability of cacao pulp at various level of hydrogen ion exponents in sending electrics and also how relation between cacaoes pulps hydrogen ion exponents ably energies pass the electrics. Research done by two treatment that is prose process and fermentation of thinning of cacao pulp. Its way beforehand look for resistivity value (ρ) from cacao pulp. From the resistivity value obtained by conductivity value (σ) cacao pulp. If connected between cacaoes pulps hydrogen ion exponents with energies pass the electrics out of two the treatment, the result is progressively low degree of acidity of cacao pulp, energy pass the electrics is progressively decline. Relation between hydrogen ion exponent with electrics conductivity at cacao pulp at fermentation process yield equation = 2,84782 + 1,01789 e [-(x-2,5)/0,626)] and at thinning process yield equation σ = 3,13506 + 0,46513 e [-(x-2,5)/0,20194). On file energy at cacao pulp is known that longer ammeter galvanometer network is attached smaller the electric current so that the energy still be small. BERKALA FISIKA 2012-03-29 09:57:34 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2867 BERKALA FISIKA; Vol 12, No 3 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/10836 2016-04-21T12:15:24Z berkala_fisika:RA

nmb a2200000Iu 4500 "150701 2015 eng " 1410-9662 dc PEMETAAN PERCEPATAN GETARAN TANAH MAKSIMUM MENGGUNAKAN PENDEKATAN PROBABILISTIC SEISMIC HAZARD ANALYSIS (PSHA) DI KABUPATEN KEPAHIANG PROVINSI BENGKULU Hadi, Arif Ismul Jurusan Fisika, FMIPA Universitas Bengkulu, Bengkulu Brotopuspito, Kirbani Sri Jurusan Fisika, FMIPA, Universitas Gadjah Mada, Yogyakarta peak ground acceleration, PSHA, red zone and Sumatran Fault of Musi Segment. This study aims to analyze and map the peak ground acceleration using the approach of Probabilistic Seismic Hazard Analysis (PSHA) in the area. Earthquake catalog data obtained from BMKG, ISC and USGS began in 1914 until 2014. Declustering process using ZMAP ver.6 software. Identification and modeling of the seismic source uses three models of seismic sources: (1) to subduction earthquake source, (2) the source of the earthquake fault and (3) the source of the quake background. Parameters a-value and b-value is obtained by the Gutenberg-Richter recurrence law and maximum likelihood method, whereas the determination of the attenuation function and logic tree refers to the Revision Team of Indonesia Earthquake 2010. Peak ground acceleration values obtained using USGS-PSHA-07 software. The results showed that the value of the peak ground acceleration in the Kepahiang District for probability exceeded 10% and 2% in the 50 year design life of the building is 0.15 – 0.8 g and 0.25 – 1.3 g. Areas that are the red zone is the Ujan Mas Sub-district, Kepahiang Sub-district, Tebat Karai Sub-district, Seberang Musi Sub-district and Bermani Ilir Sub-district, while the regions are relatively safe from the red zone is the Merigi Sub-district, Kabawetan Sub-district and Muara Kemumu Sub-district. Red zone is an area adjacent to the Sumatran Fault of Musi Segment. Keywords: peak ground acceleration, PSHA, red zone and Sumatran Fault of Musi Segment. BERKALA FISIKA 2016-04-21 11:48:02 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/10836 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 3 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3100 2012-04-07T12:39:53Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc UJI HASIL KINERJA MESIN PENGOLAH FILM OTOMATIS MINI MEDICAL Raharjo, Oky Didik Jurusan Fisika Undip Azam, Much. Jurusan Fisika Undip Ketut Umiati, Ngurah Ayu Jurusan Fisika Undip Have been researched result test of Mini Medical automatic processing film machine. The research is conducted by reforming X-ray toward the film in the cassette which there is stepwedge on it, film catharsis is then performed using automatic processing film machine. After generating radiograph, its density is measured, and then we count speed index, fog index and contrast index. This activity is conducted every day for seven days in succession. Based on the index of fog and contrast film, the result of the research indicates that the work result of automatic processingn film machine on the first until fifth day is still in the allowed limits, but on the sixth and seventh day it exceeds the permitted limits. This is due to the ability of generator solution is getting lower (solution pH is getting smaller). Mean while, its speed index for seven days is still in the permitted limits.   Keywords : Result test, automatic processing film machine, stepwedge, fog,  contrast BERKALA FISIKA 2012-04-06 10:20:23 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3100 BERKALA FISIKA; Vol 9, No 2 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2922 2012-03-30T14:32:27Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Aplikasi Transduser Ultrasonik Jenis Immersion Transducer Untuk Karakteristik Media Cair Dan Pengukuran Tingkat Kekasaran Permukaan Beton Sugito, Heri Laboratorium Elektronika dan Instrumentasi Jurusan Fisika FMIPA UNDIP Semarang Suryono, Suryono Laboratorium Elektronika dan Instrumentasi Jurusan Fisika FMIPA UNDIP Semarang Layla, Diana Laboratorium Elektronika dan Instrumentasi Jurusan Fisika FMIPA UNDIP Semarang Research of the application of ultrasonics for liquid medium characteristic and measurement of level of surface roughness of concrete have been done using immersion transducer. This purpose of research is to know characteristic some dilutions based on the atanuasi coefficients and measure surface roughness of concretes based on time of flight. In this research applied by ultrasonic transducer with frequency of 1 MHz.  At attenuation method, awakened ultrasonic signal through pulse generator and connected at transmitter transducer. Ultrasonic wave which transmitted through liquid medium will experience received finite attenuation of receiver. Media liquid which applied is oil and cooking oil. At method time-of-flight, measurement done with object scan which turned around counted 200 rotation apply motor stepper. Object which applied as component of test that is concrete. Reason of selec,choose it this specimen is to minimize attenuation so that will enlarge the bound. Transducer will transmit modulation to object through modulation transmiter and receiver. Result from scanner is presented at CRO ( Cathode Ray Oscilosco). Research result to liquid medium sample showing existence of tendency of increase of attenuation value for ex-oil- and ex-cooking oil if each compared with oil was new and new cooking oil. From measurement of level of surface roughness, obtained by is surface roughness average yield of  concrete A ( Radium of a minimum of 10%, and Ra maximum 16%), and concrete B ( Radium of a minimum of 8%, and Ra maximum 17%). This research result give hope that this method can be developed for inspection innoxious at solid and liquid medium.   keyword : Ultrasonic, attenuation coefficient, level of crudity, Time of Flight BERKALA FISIKA 2012-03-29 14:54:02 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2922 BERKALA FISIKA; Vol 12, No 4 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/23826 2019-06-25T13:45:58Z berkala_fisika:RA

nmb a2200000Iu 4500 "190624 2019 eng " 1410-9662 dc RANCANG BANGUN SISTEM KENDALI UNIT PENGOLAHAN AIR BERSIH BERBASIS ARDUINO UNO R3 DAN NEXTION Supriyadi, Achmad Teknologi Rekayasa Otomasi, Departemen Teknologi Industri, Sekolah Vokasi, Universitas Diponegoro Setyawan, Agus Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Suseno, Jatmiko Endro Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Water treatment unit, nextion, arduino uno The control of the ordinary water treatment unit on refinery location is still operated manually(by operator), especially in the filtering unit (IRF unit). There are 9 manual block valves that must be operated every 8 hours, to keep the water quality meets its specification. Manual operation can increase the risk of errors or delays in the operation or movement of service cycles and regeneration sequences. Subsequently, it can decrease the water quality and unefficiency in production. The automation of the water treatment unit was made using the nextion HMI touch screen circuit, Arduino Uno microcontroller, IC shift register, electronic relay and other electronic components. By connection between the Nextion HMI as an interface and the Arduino Uno microcontroller as electronic relay controller, the design of the control unit was able to control the clean water treatment unit simulator in accordance with the principles of the processing unit. Keywords: Water treatment unit, nextion, arduino uno BERKALA FISIKA 2019-06-24 11:44:36 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/23826 BERKALA FISIKA; Vol 22, No 2 (2019): Berkala Fisika Vol. 22 No. 2 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4978 2013-05-27T11:13:34Z berkala_fisika:RA

nmb a2200000Iu 4500 "120101 2012 eng " 1410-9662 dc SISTEM PENGENALAN WAJAH DENGAN METODE EIGENFACE DAN JARINGAN SYARAF TIRUAN (JST) Mulyono, Tri Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Adi, Kusworo Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Gernowo, Rahmat Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro The development of security systems led to the development of face recognition system using image processing techniques.Research was conducted to identify a face image automatically with theeigenface method. The method used is a normalization, eigenface, neural network training and testing.Eigenface is used to reduce the dimension vector face becomes much simpler (eigen vector). Eigen vectorsobtained are used by back propagation neural network training process and recognition. Then do thetesting process using the image of a face that has not been used in the training process. The results showed the use of neural networks and eigenface to face recognition can give a goodaccuracy. The system is able to produce an acuracy of 84.6% with a FAR (False Acceptance Rate) =16.2%, FRR (False Rejection Rate) = 20% and EER (Equal Error Rate) = 0.3. Keywords : face recognition, eigenface, eigen vector, neural network BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4978 BERKALA FISIKA; Vol 15, No 1 (2012): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2938 2012-03-30T15:02:52Z berkala_fisika:EDT

nmb a2200000Iu 4500 1410-9662 dc Cover Oktober 2008 Oktober 2008, Cover Cover Berkala Fisika 2008 BERKALA FISIKA 2012-03-30 14:12:23 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2938 BERKALA FISIKA; Vol 11, No 4 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/30607 2020-06-08T15:23:16Z berkala_fisika:EDT

nmb a2200000Iu 4500 "200131 2020 eng " 1410-9662 dc TIPE MANUSKRIP PADA JURNAL BERKALA FISIKA Anam, Choirul Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang. TIPE MANUSKRIP PADA JURNAL BERKALA FISIKA BERKALA FISIKA 2020-06-08 13:14:30 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/30607 BERKALA FISIKA; Vol 23, No 1 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/2981 2012-04-03T12:35:10Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Studi Kualitas Minyak Goreng Dengan Parameter Viskositas Dan Indeks Bias Sutiah, Sutiah Laboratorium Optoelektronik dan Laser, Jurusan Fisika FMIPA UNDIP Firdausi, K. Sofjan Laboratorium Optoelektronik dan Laser, Jurusan Fisika FMIPA UNDIP Setia Budi, Wahyu Laboratorium Optoelektronik dan Laser, Jurusan Fisika FMIPA UNDIP The aim of this research to investigate the quality of palm oil through its viscosity and refractive index before and after used. Viscosimeter Ostwald is used to measure the viscosity and refractive method in prism is used to measure refractive index. The measurement was carried out in room temperature. The samples are fresh oil, and expired oil. Analysis of the quality of palm oil based on viscosity measurement and refractive index show that palm oil that had not been used is the highest value and the palm oil that twice used is the lowest value. Keyword: viscosity, quality of oil BERKALA FISIKA 2012-04-03 11:52:36 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2981 BERKALA FISIKA; Vol 11, No 2 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/30629 2020-06-08T19:24:34Z berkala_fisika:ART

nmb a2200000Iu 4500 "200430 2020 eng " 1410-9662 dc PEMBUATAN PEMANAS INDUCTION UNTUK SISTENSIS MATERIAL DENGAN MOTODA HIDROTERMAL Nurkholis, Nurkholis Program Studi D3 Instrumentasi Vokasi, Universitas Diponegoro, Semarang Bawono, Ari Program Studi D3 Instrumentasi Vokasi, Universitas Diponegoro, Semarang Priyono, Priyono Laboratorium Fisika Material, Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Induction heater, thermocouple sensor, PID control, hydrothermal process Induction heaters furnace could work faster and more efficiently compared to the conventional electric heaters, but a temperature regulation system should be quite good and stable with a fairly long operating time. This method is suitable for the synthesis of materials that require a long operation time, such as hydrothermal process. This study aims to design and evaluate the induction heater using K-type thermocouple sensor with proportional Integral Derivative (PID) control system. Thermocouple sensors calibration tested on a set point of 150 °C to 350 °C gives a good result at stable temperature values after tested less than 90 seconds and have low error rates at 0,02% - 0,16%.  Hydrothermal synthesis process on reactor with a heating temperature of 300 °C for 24 hours gives a good result. BERKALA FISIKA 2020-06-08 15:31:49 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/30629 BERKALA FISIKA; Vol 23, No 2 (2020): Berkala Fisika eng Copyright (c) 2020 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5005 2013-05-27T15:50:54Z berkala_fisika:EDT

nmb a2200000Iu 4500 "130101 2013 eng " 1410-9662 dc Berkala Fisika Berkala Fisika, Tim Redaksi Jurusan Fisika Fakultas Sains dan Matematika Universitas Diponegoro Berkala Fisika Vol 16 No 1 (2013) BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5005 BERKALA FISIKA; Vol 16, No 1 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3024 2012-04-05T15:01:31Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Uji Sifat Listrik Film Tipis LiTao3 dan LiTaFe2O3 Indro, M. N. Departemen Fisika, FMIPA, Institut Pertanian Bogor Sastri, B. Departemen Fisika, FMIPA, Institut Pertanian Bogor Nady, L. Departemen Fisika, FMIPA, Institut Pertanian Bogor Ridwan, E. Departemen Fisika, FMIPA, Institut Pertanian Bogor Syafutra, H. Departemen Fisika, FMIPA, Institut Pertanian Bogor Irzaman, Irzaman Departemen Fisika, FMIPA, Institut Pertanian Bogor Siswadi, Siswadi Departemen Matematika, FMIPA, Institut Pertanian Bogor, Jl.Meranti gedung FMIPA, Kampus Dramaga, Bogor 16680 Lithium Tantalat (LiTaO3) pure and LF Thin films has been done is cube-shaped Ferium Oxide Fe2O3 (LFT) with a cube-shaped variation 0%, 2.5%, 5% and 7.5% above the substrate Si (100) p-type using a chemical solution deposition (CSD) method  by spin coating technique at 3000 rpm rotational speed for 30 seconds. LF Thin films made with 1 M concentration and annealing at a temperature of 850 ° C for Si substrates. Thin films on p-type silicon substrates were characterized thickness using volumetric method, characterization conductance by using LCR meter, test the current-voltage characterization (IV curve) using Keithley Meter IV model 2400, characterization of dielectric constants and time constants using the oscilloscope and function generator and pyroelectric characterization using Wetsteind bridge circuit which in furnace (combustion) to a temperature of 1300C by calculating the increase in temperature variation. From the characterization results indicate thickness thickness increases with the number pendadah ferium given oxide. IV characterization results showed that LF and LFT thin film is a dielectric resistor.Hasil are contained in a thin film on p-type silicon substrate varies in accordance with the addition pendadah used were 0%, 2.5%, 5% and 7.5%.  Keywords: LF, LFT, thin film, CSD, spin coating, annealing, cube-shaped, thickness, dielectric constant, time constant-voltage current, ferium oxides, pyroelectric.  BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3024 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/39826 2021-07-05T11:38:49Z berkala_fisika:ART

nmb a2200000Iu 4500 "210705 2021 eng " 1410-9662 dc ANALISA KERENTANAN TANAH DI KECAMATAN ADIPALA KABUPATEN CILACAP MENGGUNAKAN METODE MIKROTREMOR SEBAGAI UPAYA MITIGASI BENCANA GEMPA BUMI Wachidah, Siti Fauzatun Universitas Nahdlatul Ulama Al-Ghazali Agustin, Ninik Universitas Nahdlatul Ulama Al-Ghazali Kerentanan tanah, metode HVSR, gempa, Kabupaten Cilacap Telah dilakukan penelitian tentang kerentanan tanah di Kecamatan Adipala, Kabupaten Cilacap, menggunakan  data  rekaman  mikrotremor  untuk  dianalisa  menggunakan  metode  Horizontal  to vertical Spectral Ratio (HVSR). Metode ini digunakan untuk mengetahui nilai frekuensi dominan tanah  (f0)  dan  amplitudo  dari  frekuensi  dominan  tersebut  (A0).  Nilai  f0  dan  A0  yang  diperoleh selanjutnya akan digunakan lagi untuk menghitung nilai kerentanan tanah (Kg) yang berkaitan dengan kemampuan atau ketahanan tanah terhadap gempa. Dari hasil penelitian yang mengambil 17 titik pengambilan data diperoleh bahwa Kecamatan Adipala memiliki nilai amplifikasi tanah antara 1-8 dan merupakan kawasan dengan resiko kerusakan tinggi apabila terjadi gempa. BERKALA FISIKA 2021-07-05 11:38:49 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/39826 BERKALA FISIKA; Vol 24, No 1 (2021): Berkala Fisika eng Copyright (c) 2021 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/5261 2013-08-01T09:45:25Z berkala_fisika:RA

nmb a2200000Iu 4500 "130701 2013 eng " 1410-9662 dc RANCANG BANGUN SISTEM PENJERNIHAN DAN DEKONTAMINASI AIR SUNGAI BERBASIS BIOSAND FILTER DAN LAMPU ULTRAVIOLET Endarko, Endarko Jurusan Fisika, FMIPA, Institut Teknologi Sepuluh Nopember (ITS), Surabaya Putro, Triswantoro Jurusan Fisika, FMIPA, Institut Teknologi Sepuluh Nopember (ITS), Surabaya Nuzula, Nike Iza Jurusan Fisika, FMIPA, Institut Teknologi Sepuluh Nopember (ITS), Surabaya Armawati, Nuning Jurusan Fisika, FMIPA, Institut Teknologi Sepuluh Nopember (ITS), Surabaya Wardana, Adi Jurusan Fisika, FMIPA, Institut Teknologi Sepuluh Nopember (ITS), Surabaya Rubiyanto, Agus Jurusan Fisika, FMIPA, Institut Teknologi Sepuluh Nopember (ITS), Surabaya Muntini, Melania S Jurusan Fisika, FMIPA, Institut Teknologi Sepuluh Nopember (ITS), Surabaya Design and fabrication of appropriate technology (biosand filter) that is directly can beapplied for community has successfully been carried out for providing clean water. Thetechnology is adopted from slow sand filter method. Biosand filter that has been fabricated which is technology that is able to filter river water become clean water through filtration process from sand, gravel and an active carbon. For getting drinkable water from river water, biosand filter hasbeen combined with reverse osmosis system and ultraviolet disinfection. System of reverse osmosisand ultraviolet disinfection are used to reduce any bacteria, virus and total dissolved solids (TDS)from treated water which is resulted from biosand filter process. The results from Balai BesarLaboratorium Kesehatan Surabaya (BBLKS) has been declared that treated water from biosandfilter is met the test standards chemical and physical according to the regulation. Meanwhile theprocessed water from process through biosand filter, reverse osmosis and ultraviolet disinfectionis got predicate as drinkable water with met the test standards microbiological, chemical andphysical. Keywords: biosand filter, reverse osmosis, ultraviolet, drinking water BERKALA FISIKA 2013-08-01 09:11:11 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/5261 BERKALA FISIKA; Vol 16, No 3 (2013): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3045 2012-04-07T12:48:21Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Pengaruh Format Soal Dalam Bentuk Animasi Terhadap Validitas Dan Reliabilitas Tes Pemahaman Konsep Pembiasan Cahaya Suhandi, Andi Jurusan Pendidikan Fisika FPMIPA UPI Samsudin, Achmad Jurusan Pendidikan Teknik Mesin FPTK UPI Setyawan, Agus Jurusan Pendidikan Teknik Mesin FPTK UPI This research was conducted to investigate the influence of question format in the form of animation to the validity and reliability tests of understanding the concept of light refraction. For the sake of it has constructed a test of understanding the concept of the refraction of light in an animation format by replacing static pictures and descriptions of the phenomenon of refraction of light propagation in a static format (paper and pencil test) with computer animation. Second test version, the version animated and static versions then tested to 100 students from three high schools in Bandung, which has received the learning material of light refraction. The second test version of the test results are then analyzed to determine the validity and reliability respectively. To see the influence of a test version of the level of validity and reliability, then compare the level of validity and reliability of both versions of this test. The results showed that both the level of validity and reliability tests in levels higher than the animated version of the test in the static version. Level of validity for the second consecutive test version 0.89 (very high) for an animated version and 0.71 (high) for the static version, whereas the level of reliability, 0.92 (very high) for an animated version and 0.78 (high ) for the static version. These results show obvious evidence of the influence of question format in the form of animation on the level of validity and reliability tests of understanding the concept of habituation of light. Keywords: Animation Test Version, Test Version Static, validity, reliability, refraction of light BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3045 BERKALA FISIKA; Vol 13, No 2 (2010): Berkala Fisika, Edisi Khusus eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2884 2012-03-29T15:28:20Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Rancang Bangun Sistem Pengaturan Suhu Ruang Inkubator Bayi Berbasis Microcontroller AT89S51 Sugito, Heri Laboratorium Elektronika dan Instrumentasi Jurusan Fisika FMIPA Undip Semarang Suryono, Suryono Laboratorium Elektronika dan Instrumentasi Jurusan Fisika FMIPA Undip Semarang A room temperature adjustment system for infant incubator has created using electrical sources phase controlling. This device used  to create environment temperature which is normal and stabile, as in mother’s uterus. The main component of room temperature of infant incubator adjustment which uses electrical sources phase controlling is 100 watt fluorescent hot source, temperature sensor LM 35, ADC 0804, microcontroller AT89S51, DAC 0808, Op-Amp LM 741, Phase detector (IC TCA 785), optical isolator (optocoupler), SCR, Pulse transformator, Coding 74LS47 and seven segment display. The temperature sensor, LM 35, perform data acquisition to room temperature of infant incubator. Furthermore, it strengthened and transformed by ADC 0804 to be digital data and read by microcontroller AT89S51. Reading value compared to accepted value, reading difference use for remove phase activator IC TCA 785 through DAC 0808. IC TCA as phase adjuster through trigger SCR TIC 106, it used to obtain temperature variation in heater lamp. The result is setting poin value with reading value have been as according with extinct indicator of lamp at infant incubator room.   Keywords: infant incubator, temperature, phase control, microcontroller. BERKALA FISIKA 2012-03-29 09:48:12 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2884 BERKALA FISIKA; Vol 12, No 2 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/47903 2022-07-28T09:43:10Z berkala_fisika:ART

nmb a2200000Iu 4500 "220727 2022 eng " 1410-9662 dc UJI KARAKTERISTIK SENSOR SUHU DAN KELEMBABAN MULTI- CHANNEL MENGGUNAKAN PLATFORM INTERNET OF THINGS (IOT) Rustami, Erus Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, IPB University Adiati, Rima Fitria Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, IPB University Zuhri, Mahfuddin Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, IPB University Setiawan, Ardian Arif Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, IPB University sensor suhu, sensor kelembaban, IoT, ThingSpeak, WeMos D1 board controller. Telah  berhasil  dilakukan  uji  kinerja  empat  jenis  sensor  suhu  dan  kelembaban  yang  tersedia  di pasaran,  yaitu  DHT22,  BME280,  SHT31  dan  DS18B20.    Sensor  tersebut  dihubungkan  dengan WeMos  D1  R1  ESP8266  yang  bertugas  untuk  mengelola  dan  mengirimkan  data  ke  platform internet  of  things  (IoT)  ThingSpeak.  Pengiriman  data  menggunakan  protokol  message  queue telemetry transport (MQTT) yang berdaya rendah (low-power) dan dapat diandalkan (reliable). Laman web ThingSpeak menampilkan grafik suhu dan kelembaban masing-masing sensor. Data suhu dan kelembaban tersebut dibandingkan dengan thermohygrometer sebagai referensi. Hasil pengujian menunjukkan bahwa sensor mampu mendeteksi perubahan suhu ruangan dengan nilai pembacaan  yang  tidak  berbeda  jauh  dengan  referensi.  Secara  umum,  semua  sensor  bekerja dengan  cukup  baik  yang  ditandai  dengan  koefisien  determinasi  yang  cukup  tinggi  pada  kurva kalibrasi yaitu lebih dari 0,94 untuk suhu dan 0,96 untuk kelembaban. BERKALA FISIKA 2022-07-27 01:07:20 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/47903 BERKALA FISIKA; Vol 25, No 2 (2022): Berkala Fisika eng Copyright (c) 2022 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/6578 2014-03-21T15:24:26Z berkala_fisika:RA

nmb a2200000Iu 4500 "140101 2014 eng " 1410-9662 dc Analisis Produksi Ozon dalam Reaktor Dielectric Barrier Discharge Plasma (DBDP) Terkait Panjang Reaktor dan Laju Alir Udara Serta Pemanfaatannya untuk Menjaga Kualitas Asam Amino Ikan Teke, Sosiawati Program Studi Magister Ilmu Fisika, Universitas Diponegoro Semarang Nur, Muhammad Jurusan Fisika, Universitas Diponegoro Semarang Winarni, Tri A Jurusan Teknologi Hasil Perikanan, Universitas Diponegoro Semarang Characterization of the reactor Dielectric Barrier Discharge Plasma (DBDP) has performed as a generator of ozone (O3) and as sources of input air. Ozone was measured on a variation of the voltage (4-8 kV) with the speed of air flow of 0,5, 1, 1, 3, 4, 5, 6, 8 and 10 L/min. Plasma reactor was used as ozone generators with spiral-cylinder configuration. Spiral electrodes were made of copper wire diameter of 1,2 mm,  coil length 50  mm  and diameter cylindrical electrodes while 10,3 mm of cooper sheets with thickness 0,25 mm. Dielectric material used is pyrex with diameter 2 cm and 1,1  mm for its thickness. The AC voltage was used as plasma generators with frequency of 16 kHz. This Research used plasma reactor with three  length variations that are 5, 10 and 15 cm . Results showed voltage, the length reactor and air flow rate input  affects the ozone concentration.  Ozone concentration increased while increasing voltage,  the length of  reactor  and the flow rate used is small. Amino acids  quality  in short bodied mackerel (Rastrelliger sp.) fed ozone for  12 days of storage showed that ozone could maintain the quality of short bodied mackerel amino acids . Key Words: Spiral-cylinder Electrodes, Ozone Concentrations BERKALA FISIKA 2014-03-21 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/6578 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 1 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3062 2012-04-07T08:46:02Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Simulasi Pengisian Tangki Cairan dengan Banyak Variabel Edi Widodo, Catur Jurusan Fisika FMIPA Universitas Diponegoro A program for determination of the height of liquid in the container has been done with Python programming language version 4.2. Program was simulated by  position of the height of the liquid dependent on  the time. Program was constuct by mean finite difference equation in object oriented programming Python. Object simulation is container with given radius and infinitif height and has two crane that is liquid enter crane and liquid leaves crane. Input parameter is radius of container, radius of enter crane, radius of leaves crane, and  flow rate of enter crane. Output is  height level of liquid. The result of simulation indicated the terminal velosity is dependent or radius of enter crane, radius of leaves crane, and  flow rate of enter crane BERKALA FISIKA 2012-04-06 10:17:27 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3062 BERKALA FISIKA; Vol 10, No 2 (2007): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2713 2012-03-29T14:40:10Z berkala_fisika:RA

nmb a2200000Iu 4500 "120329 2012 eng " 1410-9662 dc Rancang Bangun Deteksi Alkohol Pada Urine Dengan Sensor TGS 2620 Berbasis Mikrokontroler AT89S51 Sutanto, Heri Haryowati, Anggraeni Dwi Jurusan Fisika Universitas Diponegoro Arifin, Zainal Jurusan Fisika Universitas Diponegoro The design of alcohol detection in urine using sensors TGS 2620 microcontroller AT89S51 has been done. This device is made with a system that is simple and affordable prices so that it can be used for police and medical laboratories. Alcohol detection in urine is done by using sensors TGS 2620, ADC and the microcontroller. Measured values of the sensor are converted by the ADC and then processed microcontroller to be processed and sent to a computer with RS 232 modules. From the results of engineering manufacture alcohol detection devices in urine obtained test results showing that an increase in the value of sensor output voltage (VRL) at the time the sensor detects the presence of alcohol and research results of alcohol in urine is shown with captions positive or negative urine samples and the percentage content of alcohol .   Keywords: Alcohol, Urine, Sensors TGS 2620, Microcontroller AT89S51. BERKALA FISIKA 2012-03-29 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2713 BERKALA FISIKA; Vol 13, No 3 (2010): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/60741 2023-12-17T10:05:13Z berkala_fisika:ART

nmb a2200000Iu 4500 "231217 2023 eng " 1410-9662 dc PEMBELAJARAN IoT MENGGUNAKAN APLIKASI TELEGRAM DAN BLYNK BAGI SISWA JURUSAN IPA SMA NEGERI I NGUTER Khuriati, Ainie Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Samsudewa, Daud Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Yuwono, Teguh Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Leksana, Muhammad Alwan Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Aqsaraya, Muhammad Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Blynk, mikrokontroler, SMA Negeri I Nguter, Telegram Dalam  era  revolusi  industri  4.0,  pembelajaran  tentang  Internet  of  Things  (IoT)  memberikan  pengetahuan  tambahan  yang  cukup    penting  bagi  siswa  untuk  menghadapi  tantangan perkembangan teknologi dan informasi. Akan tetapi, tidak semua SMA memiliki sarana dan SDM yang  memadai  untuk  pembelajaran  ini.  Untuk  menjawab  permasalahan  ini,  tim  Pengabdian Masyarakat  interaksi  dosen  dan  mahasiswa  KKN  Tim  II  tahun  2023  melakukan  upaya  dalam bentuk  pengenalan  dan  pelatihan  guna  meningkatkan  pengetahuan  siswa  SMA  Negeri  I  Nguter tentang IoT menggunakan aplikasi Telegram dan Blynk. Pelatihan ini diberikan kepada siswa kelas 12 dari 3 kelas IPA. Masing-masing kelas  dipandu oleh dua orang mentor. Antusiasme para siswa untuk  mendapatkan  pengetahuan  tentang  materi  pelatihan  cukup  tinggi,  sehingga  tujuan pengabdian dapat tercapai. BERKALA FISIKA 2023-12-17 10:05:13 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/60741 BERKALA FISIKA; Vol 26, No 2 (2023): Berkala Fisika eng Copyright (c) 2023 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/8882 2015-08-01T18:12:55Z berkala_fisika:RA

nmb a2200000Iu 4500 "140701 2014 eng " 1410-9662 dc PENGARUH PENAMBAHAN MINYAK GORENG HEWANI PADA MINYAK SAWIT TERHADAP PERUBAHAN SUDUT POLARISASI Kaltsum, Ummi Program Studi Pendidikan Fisika, FPMIPA Universitas PGRI Semarang Idrus, Hadiyati Program Studi Pendidikan Fisika, FPMIPA Universitas PGRI Semarang Firdausi, K. Sofjan Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Semarang The use of animal oil for various purposes by the people has inspired this study. The purpose of the study was to distinguish the mixture of cooking oil palm and variety of animal oil (chicken oil, beef oil, and pork oil). The composition of the mixture of palm oil and animal oil is 3:1 mL, respectively. The light source used were He-Ne laser of 1 mW (λ = 633 nm) and IR lamp of 250 watt (λ = 750-800 nm). Measurements were made based on changes in the natural polarization angle (0 kV) and electrooptics (6 kV). The result showed that the natural polarization angle changes and electrooptics of  mixture of palm oil and animal oil greater than pure palm oil, both at He-Ne laser and IR light. This is consistent with the results of the titration test, peroxide value and free fatty acids (FFA) oil mixture was greater than pure palm oil. Change in the polarization angle represents the presence of saturated fatty acids. Animal oils have saturated fatty acid content greater than palm oil, so the polarization angle changes of oil mixture is greater than polarization angle changes of pure palm oil. Keywords: animal frying oil, palm oil, polarization angle BERKALA FISIKA 2015-08-01 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/8882 BERKALA FISIKA; 2014: Berkala Fisika Vol. 17 No. 3 Tahun 2014 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3078 2012-04-07T12:31:22Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Optimasi Elektroda Pada Sistem Pembangkit Plasma Non Termik untuk Meningkatkan Kuantitas Benih Mangrove Azam, Much. Lab Fisika Atom dan Inti , Fisika FMIPA UNDIP Hidayanto, Eko Lab Fisika Atom dan Inti , Fisika FMIPA UNDIP The Mangrove is the tropics  nature resources that has two aspects, economics and ecology. This plant can be  iradiated   by the corona discharge. It is need to radiate mangrove seed with nitrogen and analize it’s  growt.  For that have need optimations of the electrode on the non thermics plasma generator system  in order to get the effective and the efficient radiations.  The steps of the research are : analize system, make a prototype, test the prototype with simulations, compare  the simulations result with the experiment result and analize the results. From the research can get conclution that: 1) had been succes to make prototype of  the mangrove plant reproduction  system by the corona discharge plasma technology with the point-plant electrode, 2) the simulations result show that  electrical fields shall increase if the distance from electrode has been  decreases, or the voltage of electrode has been  incresed, or the distance among electrode has been decreased  or  the value of the electrode radius.has been opotimum, 3) the result of simulations show that the current density  shall  decrease if distance among electrode has been decreased, 4)for the same distance electrode, the electricel fields of the experiment results  is bigger than the simulations result, because the value of permeability and permittivity medium on the simulation is using the  value of    the vaccum  space.     Key words : the non thermics plasma, iradition, Mangrove BERKALA FISIKA 2012-04-06 10:20:46 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3078 BERKALA FISIKA; Vol 9, No 4 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2799 2012-03-29T12:03:46Z berkala_fisika:RA

nmb a2200000Iu 4500 "120329 2012 eng " 1410-9662 dc RANCANG BANGUN PENGENDALI MOTOR STEPPER UNTUK DETEKSI JUMLAH OBYEK PUTAR DENGAN MENGGUNAKAN KOMPUTER Sumariyah, Sumariyah Laboratorium Elektronika Dan Instrumentasi Fisika FMIPA UNDIP Sudarmanto, Agus Tadris Fisika Fakultas Tarbiyah IAIN Walisongo Semarang Gunadi, Isnain Laboratorium Elektronika Dan Instrumentasi Fisika FMIPA UNDIP It has been designed a mechanical equipment what could moving rotate each 45° and moving up and down betake to sensor hole, that be drive by two stepper motors. The operation of both stepper motors use Turbo Pascal language programming 5.5 version. The mechanical equipment could be operated in a automatically that is for moved the object rotate each 45° then the object betake down aim sensor hole and execute detection the object so after detected then the object move ascend aim first position. Result of using this mechanical equipment was have appearing result from detection object be automatically that is amounting to eight objects.   Keyword : PC, stepper motors, object rotate. BERKALA FISIKA 2012-03-29 06:14:46 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2799 BERKALA FISIKA; Vol 14, No 1 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/75312 2025-07-01T01:08:35Z berkala_fisika:ART

nmb a2200000Iu 4500 "250630 2025 eng " 1410-9662 dc ANALISIS MODULATION TRANSFER FUNCTION (MTF) DAN CONTRAST-TO-NOISE RATIO (CNR) CITRA CT SCAN UNTUK OPTIMASI KUALITAS CITRA Azhara, Mutiara Fatimah Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Dewang, Syamsir Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Rosyidah, Ulfah Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Astuty, Sri Dewi Laboratorium Fisika Medik dan Biofisika, Departemen Fisika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Hasanuddin, Indonesia Somad, Bannu Abdul Instalasi Radiologi, RSUD Haji Makassar, Indonesia IndoQT, Resolusi Kontras Tinggi, Resolusi Kontras Rendah. Salah satu parameter utama dalam kualitas citra CT scan untuk penegakan diagnosa adalah   resolusi kontras tinggi, yang dinyatakan dengan Modulation Transfer Function (MTF) dan resolusi kontras rendah, yang dinyatakan dalam contrast-to-noise ratio (CNR). MTF dan CNR menjadi kriteria penting untuk membandingkan protokol dosis tinggi dan dosis rendah, yang bergantung pada karakteristik obyek target. MTF mengkarakterisasi tingkat keburaman pada domain frekuensi sedangkan CNR mengkuantifikasi detektabilitas objek-objek kontras rendah. Penelitian ini menggunakan fantom American Association of Medical Physicists in Medicine (AAPM) sebagai obyek dengan variasi arus tabung dan tebal irisan. Citra dianalisis dengan software Radiant DICOM dan IndoQCT. Pengukuran dilakukan dengan dua variasi yaitu arus tabung 100, 130 dan 150 mA pada tegangan tabung 80 kV dan tebal irisan 2,5 mm. Sedangkan untuk variasi tebal irisan 1,25, 3,75, dan 5 mm pada tegangan tabung 80 kV dan arus tabung 125 mA. Hasil penelitian menunjukkan nilai MTF10 masing-masing variasi arus tabung berturut-turut 0,7 line/mm; 0,7 line/mm; dan 0,8 line/mm. Nilai MTF masing-masing variasi tebal irisan sama yaitu 0,7 line/mm. Nilai CNR pada variasi arus tabung sebesar 2,548; 3,016; dan 3,482 serta pada variasi tebal irisan diperoleh 2,308; 2,613; dan 2,735. Semakin besar nilai arus tabung dan tebal irisan, maka nilai MTF semakin tinggi demikian pula untuk nilai CNR. BERKALA FISIKA 2025-06-30 09:08:52 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/75312 BERKALA FISIKA; Vol 28, No 1 (2025): Berkala Fisika eng Copyright (c) 2025 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/9669 2015-12-08T10:02:51Z berkala_fisika:RA

nmb a2200000Iu 4500 "150401 2015 eng " 1410-9662 dc STUDI APLIKASI EFEK FOTOKATALIS ZnO:Ag DIKOMBINASI OZON PADA PROSES PENCUCIAN CABAI Sutanto, Heri Jurusan Fisika, Universitas Diponegoro, Semarang Arifin, Zaenal Jurusan Fisika, Universitas Diponegoro, Semarang Wibowo, Singgih Jurusan Fisika, Universitas Diponegoro, Semarang Hidayanto, Eko Jurusan Fisika, Universitas Diponegoro, Semarang Photocatalyst, ozone, chilies. In this study, we have done evaluation of photocatalyst and ozone effect on chilies. The photocatalyst thin film was made by Ag doped zinc oxide (ZnO). The film was evaluated by X-ray diffractometer (XRD), Scanning Electron Microscopy (SEM) and UV-Vis for crystall stucture, morphology and optical band gap analysis. XRD result showed that the film has hexagonal wurtzite structure with crystallite size about 19.93 nm. From SEM result, morphology of film was not homogen and there were a lot of pores. From UV-Vis measurement, we could calculate the optical band gap of film about 3.081 eV.  The chilies that used is hot peppers. They were washed by water from ZnO:Ag photocatalyst and ozone treatment. Time for water treatment was adjusted for 0, 15, 30 and 45 min. We have done monitoring on loss of mass of the chilies. The result showed that  15 min sample showed better result than other sample. In this sample, the chilies had smallest change of loss mass in 13 day observation. Keywords : Photocatalyst, ozone, chilies. BERKALA FISIKA 2015-12-08 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/9669 BERKALA FISIKA; 2015: Berkala Fisika Vol. 18 No. 2 Tahun 2015 eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/3095 2012-04-07T12:38:22Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Penghitungan Rasio Intensitas Ca (II) 396,8 nm dan Ca (I) 422,6 nm pada Sampel Tasbih Asli dan Imitasi menggunakan Metode Laser Induced Shock wave plasma (LISPS) Khumaeni, Ali Laboratorium Riset, Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan alam,Universitas Diponegoro, Kampus Tembalang, Semarang, 50275, Indonesia Setia Budi, Wahyu Laboratorium Riset, Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan alam,Universitas Diponegoro, Kampus Tembalang, Semarang, 50275, Indonesia Firdausi, K. Sofjan Laboratorium Riset, Jurusan Fisika, Fakultas Matematika dan Ilmu Pengetahuan alam,Universitas Diponegoro, Kampus Tembalang, Semarang, 50275, Indonesia Spectral analysis of elemental bead samples has been done using Laser Induced Schock Wave Plasma (LISPS). This experiment is aim to distinguish between bead samples from fresh white coral and its artificial from hardwood through determination of spectral intensity of Ca(II) 396,8 nm and Ca(I) 422,6 nm. The samples are held by 10 torr and induced by NdYAG Laser 1064 nm in wavelength. Results show that the original and artificial samples can be distinguished from ratio of intensity at 1,68 : 0,80 both for white coral and its artificial from hardwood through determination of spectral intensity of Ca (II) 396,8 nm dan Ca (I) 422,6 nm respectively. BERKALA FISIKA 2012-04-06 10:20:23 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/3095 BERKALA FISIKA; Vol 9, No 2 (2006): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2895 2012-03-29T15:40:30Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Aplikasi Plasma Lucutan Berpenghalang Dielektrik pada Peningkatan Kualitas Air dengan Mengalirkan Air secara Langsung dalam Reaktor Berkonfigurasi Elektroda Spiral-Silinder Muhlisin, Zaenul Laboratorium Riset Nuklir dan Atom Jurusan Fisika Fakultas MIPA UNDIP Oktiyana, Wulandary Laboratorium Riset Nuklir dan Atom Jurusan Fisika Fakultas MIPA UNDIP Nur, Muhammad Laboratorium Riset Nuklir dan Atom Jurusan Fisika Fakultas MIPA UNDIP A dielectric barrier discharge plasma reactor has been realized and characterized with air source as a working gas. Ozone and dissolved ozone concentration were measured at various voltages (4 to 8 kV), treatment time ( 1 to 5 minutes), water flow rate 4.167 l/min and different air flow rates (1.5 and 2.5 l/min). And the other hand, for understand the ability of ozone to improve water quality, dissolved oxygen has been measured at various voltage (3.6 to 5.2 kV) and after treatment time (until 90 minutes). Spiral electrode is made by copper wire with circumference length 500 mm and diameters 1 mm, while cylindrical electrode is made from aluminum foil with 450 mm in length. Aluminum foil is stuck at inner wall of PVC tube with 500 mm in length and diameter 1.25 inch. Pyrex is used as dielectric material, with length 500 mm, inner diameter 10 mm and thickness 1 mm The result show ozone is produced have maximum concentration 15.613 ppm and dissolved ozone have maximum concentration 10.305 ppm. As a whole ozone concentration higher than dissolved ozone concentration. Both of ozone and dissolved ozone concentration increases by increase of the voltage applied, increases by increase treatment time and increases by decrease of the gas flow rate inside the reactor. Command dissolved oxygen increases with the increase of the high voltage applied and increases after dissociation ozone in water. Key Words : spiral cylindrical electrode, dielectric barrier discharge, the ozone concentration, the dissolved ozone concentration, dissolved oxygen BERKALA FISIKA 2012-03-29 09:57:34 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2895 BERKALA FISIKA; Vol 12, No 3 (2009): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/23479 2019-06-25T13:50:25Z berkala_fisika:RA

nmb a2200000Iu 4500 "190529 2019 eng " 1410-9662 dc KARAKTERISASI REAKTOR PLASMA BERARUS NEGATIF DENGAN KONFIGURASI ELEKTRODA TITIK-BIDANG DAN PENERAPANNYA PADA KAIN POLYESTER RAJUT GREY Hasan, Siti Nurjannah Departemen Fisika, Fakultas Sains dan Matematika Universitas Diponegoro Muhlisin, Zaenul Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro Triadyaksa, Pandji Departemen Fisika Fakultas Sains dan Matematika Universitas Diponegoro Arianto, Fajar Departemen Fisika Fakultas Sains dan Matematika Universitas Diponegoro Plasma corona, multi-point field, ion mobility, polyester fabric, textile treatment, the meeting properties of fabric. Research on characterisations of plasma reactor with negative current of square-point electrode configuration and its application on grey polyester knit fabric has been carried out. The objectives of this reseach were obtaining characterisation of negative plasma reactor, either with or without sample of the polyester knit fabric, getting ion mobility value, gaining the characterisation of irradiated polyester knit fabric of grey, and obtaining SEM results indicating the morphological changes of the fabric. A Plasma-Electrode Point Plasma reactor which is connected to a high-voltage DC power plant was used in this study. The size of pointfield electrodes was 15 x 15 cm2 with a 1.6 cm needle. The size of the grey knit polyester fabric used was 10 x 10 cm2. Variations in distance between electrodes were 1.5 cm, 1.8 cm, 2.1 cm 2.4 cm, 2.7 cm, 3.0 cm, and 3.3 cm. The results have shown that if the voltage increases, then the current value increses. The voltage which is needed to produce a lower current values is that the presence of a polyester knit fabric of grey. The highest voltage and current values witout sample can be found at a distance of 3.3 cm with a current value of 2.5 mA at a voltage of 3.027 kV, compared with presence of a sample, a current value of 1.6 mA at a voltage of 3.445 kV. The greater distance of the electrode, the smaller ion of the mobility is achieved. Based on the results of the water drop test showed that the longer the irradiation of the cloth, the faster duration of absorption. This is indicated by a distance of 2.4 cm in the duration of 5 minutes obtained the absorption time of 2.15 seconds while in the duration of 35 minutes obtained 1.47 seconds. In the SEM test, it is used 2 cloths where the first cloth used as a control or not subjected to plasma that has little damage where as the second fabric is subjected to plasma treatment with the time of irradiation is about 20 minutes that have damage or peeling on the surface of polyester knit fabrics grey. Keywords: Plasma corona, multi-point field, ion mobility, polyester fabric, textile treatment, the meeting properties of fabric. BERKALA FISIKA 2019-05-29 10:45:06 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/23479 BERKALA FISIKA; Vol 22, No 1 (2019): Berkala Fisika Vol. 22 No. 1 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4973 2013-05-27T11:15:31Z berkala_fisika:RA

nmb a2200000Iu 4500 "111001 2011 eng " 1410-9662 dc KOMPARASI KUALITAS CITRA HASIL REKONSTRUKSI METODE ALGEBRAIC RECONSTRUCTION TECHNIQUE (ART) ADITIF DAN MULTIPLIKATIF (MART) PADA CT SCAN Anam, Choirul Jurusan Fisika, FMIPA, Universitas Diponegoro, Semarang Firdausi, K Sofjan Jurusan Fisika, FMIPA, Universitas Diponegoro, Semarang AbstractImage recontruction for CT scan by the methods of additive ART and muliplicative ART (MART) have been carried out using Malab software. The object used is Sheep-Logan phantomwith matrix size 50x50,  used a paralel beam and  angle interval 10, 50, 10,respectively. It is obtained that additive ART produces many artifacts, while MART producesfewer artifacts. Additive ART produces a contras between objects and background with relativelyhigh, while MART produces relatively lower contrast. It is obtained that in the additive ART,interval angle affects the quality of image. This does not happen to MART. So, the MARTreconstruct CT image faster, because it can be obtained relatively good image despite the angleinterval is large. Keywords: Image reconstruction, Additive ART, Multiplicative ART (MART) BERKALA FISIKA 2013-05-25 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4973 BERKALA FISIKA; Vol 14, No 4 (2011): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/2933 2012-03-30T15:02:59Z berkala_fisika:RA

nmb a2200000Iu 4500 1410-9662 dc Rancang Bangun Sensor Pergeseran Tanah Digital Suryono, Suryono Lab. Instrumentasi dan Elektronika Jurusan Fisika FMIPA UNDIP Semarang The Research has been produced digital displacement field sensor system.  This system can be applied on displacement level monitoring of building, bridge, dike  and so forth. This developed system work serial digitally so that It can be connected to computer for many purpose. The field Displacement sensor use sliding potentiometer and  a 10 bit Analog to Digital Converter (ADC) at microcontroller. The value of field displacement is sent digitally as multi byte serial  data through UART serial communication protocol. The acquired data read to computer through COM1 with Borland Delphi 7.0 program. The research A system which can measure field displacement has been  acquired from this research. The system has 1 mm resolution specification with the range of measurement up to 57 meters. From the  sensor’s output  has been acquired the output of the system with has the equation  y = 0,990x + 0,154 with the linear correlation  0,998. Keyword : Displacement, digital, serial BERKALA FISIKA 2012-03-30 14:12:23 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/2933 BERKALA FISIKA; Vol 11, No 4 (2008): Berkala Fisika eng Copyright (c)

oai:ojs.ejournal.undip.ac.id:article/27253 2020-06-08T13:09:22Z berkala_fisika:ART

nmb a2200000Iu 4500 "191212 2019 eng " 1410-9662 dc KRISTALINITAS DAN UKURAN NANOPARTIKEL ZnO YANG DIKALSINASI PADA TEMPERATUR 100oC dan 200oC Hernowo, Alfian Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang Nurhasanah, Iis Departemen Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro, Semarang zinc oxide, nanoparticles, precipitation, crystal structure, crystallinity The purpose of this researh is to analyze a crystalinity and size of zinc oxide (ZnO) nanoparticles. ZnO nanoparticles were synthesized using precipitation method followed by ultrasonic radiation. Precipitation products were calcined at temperature of 100oC and 200oC. ZnO nanoparticles were characterized using X-Ray Diffractometer (XRD) and Scanning Electron Microscope (SEM). The XRD pattern showed formation of ZnO nanoparticles with wurtzite hexagonal structure. ZnO nanoparticles with crystalinity higher than 50% was obtained at calcination temperature of 200oC. ZnO nanoparticles composed by a collection of crystallites that form spherical particle with size in the range 150–250 nm. Keywords: zinc oxide, nanoparticles, precipitation, crystal structure, crystallinity BERKALA FISIKA 2019-12-12 08:25:35 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/27253 BERKALA FISIKA; Vol 22, No 4 (2019): Berkala Fisika Vol. 22 No. 4 Tahun 2019 eng Copyright (c) 2019 BERKALA FISIKA

oai:ojs.ejournal.undip.ac.id:article/4989 2013-05-27T16:02:58Z berkala_fisika:RA

nmb a2200000Iu 4500 "120701 2012 eng " 1410-9662 dc PEMBUATAN KOMPOSIT SERAT SERABUT KELAPA DAN RESIN FENOL FORMADEHIDE SEBAGAI MATERIAL PEREDAM AKUSTIK Kartikaratri, Yohana Maya Laboratorium Material, Jurusan Fisika, Fakultas Sains dan Matematika Universitas Diponegoro Subagio, Agus Laboratorium Material, Jurusan Fisika, Fakultas Sains dan Matematika Universitas Diponegoro Widyandari, Hendri Laboratorium Material, Jurusan Fisika, Fakultas Sains dan Matematika Universitas Diponegoro The sound pollution due to noise is a one clasical problem in Indonesia. Theloudness can be reduced using the accoustic absorber. The composites of coconut fiberhas potential application as an environmental friendly accoustic absorber which is usingan agriculture waste. We reported the preparation of composite of coconut fiber as amatrix material and fenol formaldehide served as binder (coconut fiber/FF composite).The  immersion of coconut fibers  in the NaOH solution of 2% for 4 hours were caried outpriorly for improving the strengthness.The absorption coefficient (α) of the preparedcoconut fiber/FF composite was observed using two microphone impedance tube method(ISO 10534 – 2 dan ASTM E1050 – 08.   The value of tested absorption coefficient (α) allof composites samples have fulfilled the requirement. Requirement of acoustic absorbervalue of α is more than 0,15; and all of composites samples fulfilled the requirement onfrequency 752 Hz - 6400Hz.  Keyword : absorption coefficient, acoustic absorber, composite, coconut fiber, fenolformaldehid. BERKALA FISIKA 2013-05-27 00:00:00 application/pdf https://ejournal.undip.ac.id/index.php/berkala_fisika/article/view/4989 BERKALA FISIKA; Vol 15, No 3 (2012): Berkala Fisika eng Copyright (c)