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All Journal International Journal of Advances in Applied Sciences Reaktor BERKALA FISIKA SAINS DAN MATEMATIKA YOUNGSTER PHYSICS JOURNAL Edumatsains Journal of Physics and Its Applications Indonesian Journal of Electrical Engineering and Computer Science Jurnal Pengabdian West Science
Eko Hidayanto
Departemen Fisika, Fakultas Sains Dan Matematika Universitas Diponegoro Jl. Prof. Soedarto, SH, Tembalang, Semarang Telp./Fax. (024)74680822/(024) 74680822
Agriculture, Biological Sciences & Forestry Humanities Astronomy Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Environmental Science Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences

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Journal : YOUNGSTER PHYSICS JOURNAL

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PENENTUAN INDEKS BIAS DARI KONSENTRASI SUKROSA (C12H22O11) PADA BEBERAPA SARI BUAH MENGGUNAKAN PORTABLE BRIXMETER Tiffany Rahma Novestiana; Eko Hidayanto
Youngster Physics Journal Vol 4, No 2 (2015): Youngster Physics Journal April 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

One of the determination of the quality of the juice is concentration. Concentration can determine the value of the refractive index with a refractive index with a Abbe Refractometer. This experiment was determined the value of the refractive index of branded fruit juices using Portable Brixmeter was to get correlation between refractive index and concentration and correlation between concentration and length of measurement, and quality of fruit juice using Portable Brixmeter. The research was conducted by dilution and observation of length time measurement of fruit juice concentration. Data were analized by approach linier charts for dilution, while the length of time measurement of juice concentration with quadratic approach of polynomial. The amount of sucrose liquid concentration is comparable with its refractive index. Correlation between liquid concentration of C sucrose with refractive index n in pure sucrose (ns):0,0018C+ 1,3270 for fruit juice of guava, orange, apple, and soursop respectively (nja):0,0013C+1,3336; (nje):0,0014C+1,3334; (na):0,0015C+1,3329 and (nsi):0,0014C+1,3331. According to the length measurement of the concentration, the longer of time measurement decreased the concentration value. Concentration equation contained fruit juice taste guava, orange, apple, and soursop respectively: (Cja):-0.0016t2+0.0199t+13.365; (Cje):- 0.0062t2+0.0916t+11.444; (Ca):-0.0024t2-0.0016t+12.472 and  (Csi):-0.0032t2+0.0015t+12.158. Keywords: refractive index, sucrose concentration, portable brixmeter, fruit juice.
Produksi gas hydrogen menggunakan metode elektrolisis dari elektrolit air dan air laut dengan penambahan katalis NaOH Yoyon Wahyono; Heri Sutanto; Eko Hidayanto
Youngster Physics Journal Vol 6, No 4 (2017): Youngster Physics Journal Oktober 2017
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

This study deals with the production of hydrogen gas (H2) using electrolysis method. H2 gas is a source of Renewable Energy (EBT).This research was conducted to determine the amount of concentration (ppm) and purity (% vol) of H2 gasses produced by electrolysis method. The purify and concentration of H2 gasses was determined using gas analyzer and MQ sensor 8 respectively. The results showed that the production of H2 gas with the highest concentration was obtained in aqueous electrolysis DM + NaCl + NaOH with a 12 volt voltage 4500 ppm. Production of H2 gas in aqua DM electrolysis, aqua DM + NaCl, and aqua DM + NaOH no detectable pollutant gas such as CO, CO2, HC, NO.Keywords: Electrolysis, Energy, Hydrogen gas, Catalyst.
PENGARUH PERUBAHAN FAKTOR EKSPOSI TERHADAP NILAI CT NUMBER Tina Melinda; Eko Hidayanto; Zaenal Arifin
Youngster Physics Journal Vol 3, No 3 (2014): Youngster Physics Journal Juli 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

CT Number valuehad been conducted with various of exposurefactoronCT. Testingwas conducted to test the CTNumber value changeswith varioues of exposure factorsthencompare it withthe recommendedtolerance. Testing was doneby usingsome objectthere arewater phantom, plasticwaterphantom, chickenblood, chicken (breast part) andchickenbone(thigh). Performedwithtwoscanning, axialandhelicalscanning methods. Various of exposurefactors used the voltage 80 kVp to 140kVp, current100 mA  to 180mAandexposure time0.6 second to 2second. Collimatorwith alargeselection and slice thickness 5mm.            From the test resultshave known thatchangesof the exposurefactorswill affectedCTNumber value. CT Number value obtain from the test results by using water phantom -2,50 HU until -4,99 HU, plastic water phantom -6,99 HU until +6,99 HU, blood +31,01 HU until +36,70 HU, chiken (soft tissue) +48,33 HU until +66,61 HU and bone +800,15 HU until +1188,28 HU.Thevalue is stillwell withinthe recommendedtolerancesareforwater phantom andplasticwaterphantom0±7HU, blood+30 HU to+45HU, soft tissue+37 HUto+300 HU andbone+700HUto+3000 HU.Keywords: CTNumber, exposure factors, plasticwaterphantom, axial scanning andhelicalscanning
ANALISA KURVA PERCENTAGE DEPTH DOSE (PDD) DAN PROFILE DOSE UNTUK LAPANGAN RADIASI SIMETRI DAN ASIMETRI PADA LINEAR ACCELERATOR (LINAC) 6 DAN 10 MV Mariatul Khiftiyah; Eko Hidayanto; Zaenal Arifin
Youngster Physics Journal Vol 3, No 4 (2014): Youngster Physics Journal Oktober 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

External radiotheraphy uses either symmetry or asymmetry radiation field. Percentage Depth Dose (PPD) and Dose Profile on either symmetry or asymmetry radiation field is an important parameter in conducting external therapy that is to analyze the result of parameters used for measurement, whether it is adjusted according to the specified tolerance limit. If the field size 10 X 10 cm2 is still in specified tolerance limit or it has been exceeding the limit.The techique used to collect the data was comparing whether dose distribution taken on the surface of either symmetry or asymmetry radiation field with maximum depth gained from Percentage Depth Dose (PPD) measurement and in the depth of 2 cm. By using device Linear Accelerator (LINAC) energy foton 6 and 10 MV in the radiation field with condition field no off-set and off-set 1 cm, off-set 3 cm and off-set 5 cm with Source Surface Distance (SSD) value 100 cm and in radiation field 10 X 10 cm2.The measurement result showed a change depth on Percentage Depth Dose (PPD) value in the off-set of radiation field 5 cm, on both kinds of energy caused by beam hardening, with value of symmetry and flatness 1.43% and 9.28%, for energy 6 MV and 2.2%, 6.59% for energy 10 MV. There was a change in file profile that caused declining value of flatness, and symmetry. Dose distribution because of this asymmetry radiation field should be concerned in clinical for application of asymmetry radiation field usage. Keywords: Percentage Depth Dose (PDD), Profile Dose, Symmetry, Asymmetry, flatness.
ANALISIS DISTRIBUSI COMPUTED TOMOGRAPHY DOSE INDEX (CTDI) PADA BODY PHANTOM Nur Paramita Nira Mulyono; Eko Hidayanto; Zaenal Arifin; Choirul Anam
Youngster Physics Journal Vol 3, No 4 (2014): Youngster Physics Journal Oktober 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Measurement of Computed Tomography Dose Index (CTDI) Distribution in Body Phantom has been done in Dr. Karyadi’s Hospital. The purpose of this research were to find out value of CTDI in the five holes in body phantom and to determine relation between slice thickness and CTDI. This research used CT Dose Profiler in helical CT and CT Dose Profile Analyzer Software. This measurement applied protocol of abdomen with tube voltage 120 kV, time rotation 200 mAs, pitch 1, scan length 160 mm, and scan time 5, 07 second. Measurement was applied variation of detector position in the five holes (center, top perifer, right perifer, bottom perifer, and left perifer) and slice thickness   1 mm, 2 mm, and  3 mm. Average CTDI value in five holes of body phantom has range about 11,97 mGy until         13,17 mGy. There are slight differences among all of five holes. It show that dose ditribution in the center and perofer of body phantom tend to be homogeneous. The fluctuation of CTDI values for 1 mm, 2 mm, and 3 mm slice thickness has nocertain pattern or trend. CTDI values have slight differences among the thickness. The measurement show that   1 mm, 2 mm, and 3 mm slice thickness has 0,5 mGy difference to CTDI value. Keyword: CTDI, five holes, body phantom, slice thickness
ANALISIS PROFIL BERKAS RADIASI LINEAR ACCELERATOR 6MV PADA PENGGUNAAN VIRTUAL WEDGE DENGAN GAFCHROMIC FILM Arisa Dwi Sakti; Eko Hidayanto; Heri Sutanto; Sanggam Ramantisan
Youngster Physics Journal Vol 4, No 3 (2015): Youngster Physics Journal Juli 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

Analysis of the radiation beam profile linear accelerator 6mV on the use of virtual wedge with gafchromic film done as a virtual wedge calibration on the linear accelerator . Virtual wedge calibration was originally done using ionization chamber detector, but its use is not efficient because for one-time calibration with an area of 10 x 10 cm2 field takes 10 times the exposure with the results of 10 data transform one dose profile curve . It takes a dosimeter that can capture the entire virtual dose results wedge with one exposure is gafchromic films with an area that can be customized . This research was conducted with a virtual wedge on the Siemens PRIMUS linear accelerator , scanner Epson Stylus 10000 XL , Solid Water Phantom , Matlab Program and Excel Program. This research begin to find the corelation between radiation beam and pixel value on gafchromic film with field size 1x 1 cm2. This corelation in used to find profile dose of virtual wedge from gafchromic film with field size 1 x 11 cm2. Variation fof gafchromic film is in this angle on 150, 300, and 450, opening jaws in Y1and Y2and teh last variation of half beam position in (-10 until 0),(-5 until 5) and (0 until 10). This research find that in higher beam dose, make the darkness film but lowerpixel value.ther are 2 corection in jaws position Y2 half beam (-10 until 0)300 and jaws position Y2 half beam (0 until1 0) 450. No one of ymetrisity value higher than 3% appropriate with AAPM TG-47.Keyword: virtual wedge, profil dosis, gafchromicf film, half beam
PENENTUAN AKTIVITAS 60CO DAN 137CS PADA SAMPEL UNKNOWN DENGAN MENGGUNAKAN DETEKTOR HPGe Miftahul Aziz; Eko Hidayanto; Diah Dwiana Lestari
Youngster Physics Journal Vol 4, No 2 (2015): Youngster Physics Journal April 2015
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

The measurement of radioactivity 60Co and 137Cs in the unknown sample were conducted to determine activity value using HPGe detector. Calibration of energy, calibration efficiency, making the efficiency of the curve calibration, and validation methods are the determination of sample source activity. Calibration of energy and efficiency using standard sources QCRB 1186 and 152Eu. Enumeration carried out using two detectors with efficiencies of 25% and 35%, respectively at a distance of 17 cm and 24 cm. Efficiency curve created using the excel program. Determination of activity is carried out by chopping Co and Cs in the unknown sample at the same position as the standard source for 3600 seconds. Method validation is done by calculating the activity of standard source QCRB 1186 and 152Eu. Method validation using standard source 152Eu at a distance of 17 cm provide a bias of 1,4% - 3,6% and at a distance of 24 cm provide a bias of 0,3% - 4,6%. Determination of activity the unknown sample against reference value at a distance of 17 cm (Co 1173 keV: 16125 Bq and 16716 Bq; Co 1332 keV: 16526 Bq and 16287 Bq; Cs 662 keV: 16526 Bq and 16287 Bq) and at distance of 24 cm (Co 1173 keV: 15289 Bq and 16533 Bq; Co 1332 keV: 15477 Bq and 16481 Bq; Cs 662 keV: 37226 Bq and 38540 Bq). Keywords: Activity, 60Co, 137Cs, Calibration efficiency, Method Validation
PENGUKURAN TINGKAT RADIOAKTIVITAS 210Pb DAN 40K PADA TEMBAKAU ROKOK SERTA ESTIMASI DOSIS EFEKTIF YANG DITERIMA DARI MEROKOK Achmad Chalid Afif; Eko Hidayanto; Zaenal Arifin; Poppy Intan Tjahaja; Putu Sukmabuana
Youngster Physics Journal Vol 3, No 4 (2014): Youngster Physics Journal Oktober 2014
Publisher : Jurusan Fisika, Fakultas Sains dan Matematika, Universitas Diponegoro

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Abstract

The radioactivity in tobacco leaves assessment collected from 14 popular brand in Indonesia. Cigarette was studied in order to find activity concentration of 210Pb and 40K in a cigarette sample, and the effective dose induced to smokers from cigarette tobacco due to the naturally occurring radionuclides, such as 210Pb and 40K. It was concluded that the activity consentration of radioisotope 210Pb varied from 2,22 Bq/kgto 5,56 Bq/kg with average 3,968 ± 1.042 Bq/kg, 210Pb originated from the air and was deposited onto the tobacco leaves and trapped by trichomes, while for 40K from 8,89 Bq/kgto 15,56Bq/kg with average11,75 ± 1,782 Bq/kg.40K in the tobacco leaves was due to root uptake either from soil or fertilizer. The annual effective dose do to inhalation for adults smokers for 210Pb from 16,47 µSv/year to 41,18 µSv/year with average 29,42 ± 7,772 µSv/year. This dose must be compared with the average worldwide exposure to natural radiation source 2,4 mSv/year and especially the part due to inhalation which is 1,26 mSv/year.Keywords: Radioactivity, tobacco leaves, effective dose, smoking
Co-Authors Abdul Rofiq Achmad Chalid Afif Afrio Rika. R Agitiya, Jeremia Yohana Agus Joko Prasetyo Agus Romadhon Agus Subagio Ahmad Pradana Alfia Hanim Ali Khumaeni Ali, Mohd Hanafi Ana Aprilia Anugrah Rahma Ari Wiganti Ardian Handoko Ari Bawono P Ari Bawono Putranto Ariij Naufal Arisa Dwi Sakti Astri Suppa Supratman Bambang Haris Suhartono, Bambang Haris Budi Muhammad AR Candra Ancila Choirul Anam AM Diponegoro Cintaniagitas, Najla Fadia Diah Dwiana Lestari Duandini, Ega Elin Nuraini Elvira Rizqi Widyanti Erna Mariani Etika, Eva Anggun Evi Setiawati Galih Puspa Saraswati Galih Puspa Saraswati Gani Gunawan Gede Wiratma Jaya H Hadiyanto Hella Arofah Heri Sugito Heri Sutanto Hidayatullah Hidayatullah I. Istadi Idam Arif Iis Nurhasanah Indras Marhaendrajaya Insiano, Dewi A. Iva Nistiyanti Jhonwesly Manik Jonathan, Felix Josepa ND Simanjuntak Jun Kawai K Sofjan Firdausi Karnoto . Lamtiyah Ikha Indriyana M Rizqi Aditya Rahman Maghfiroh, Ummi Lailatul Mariatul Khiftiyah Maya, Annisa Tenri Miftahul Aziz Mohammad Haekal Muahamad Irsal Much. Azam Muchammad Azam, Muchammad Muhammad Irwanto Muhammad Nur Muharam Budi Laksono, Muharam Budi Mulatomo, Tunggul Drajat Naufal, Ariij Nur Paramita Nira Mulyono Nurul Hikmantiyah Nurulita, Syaphira Faza Pandji Triadyaksa Poppy Intan Tjahaja Poppy Intan Tjahaja Puput Khusnaiatul Putri Parmitasari Putu Sukmabuana Rafli Filano Rahmawati Hidayah Rini Shintawati Salimatul Litasova Sanggam Ramantisan Sanggam Ramantisan Sanggam Ramantisan Santi Yuli Astuti Septo Pawelas Arso Singgih Wibowo Sri Murni Susila Wardaya, Susila Takashi Yamamoto Teruo Tanabe Tiffany Rahma Novestiana Tina Melinda Tri Windarti Ukhti Lailun Nisa Very Richardina Wahyu Setia Budi Wahyu Tri Cahyanto Wahyuddin Wahyuddin Yoyon Wahyono Yoyon Wahyono Zaenal Arifin