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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
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 Astronomy Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Earth & Planetary Sciences Education Energy Environmental Science Materials Science & Nanotechnology Mathematics Physics

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Respon Berbagai Bentuk, Ukuran dan Bahan Elektroda Pada Pengayaan Elektrolisis Tritium dalam Sampel Air Hidayanto, Eko; Tjahaja, Poppy Intan; Arif, Idam
BERKALA FISIKA Vol 12, No 3 (2009): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

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
Redaksional Berkala Fisika Hidayanto, Eko
BERKALA FISIKA 2014: Berkala Fisika Vol. 17 No. 1 Tahun 2014
Publisher : BERKALA FISIKA

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Vol 17 No.1 2014
Aplikasi Portable Brix Meter untuk Pengukuran Indeks Bias Hidayanto, Eko; Rofiq, Abdul; Sugito, Heri
BERKALA FISIKA Vol 13, No 4 (2010): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

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
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; Wardaya, Susila; Budi, Wahyu Setia; Hidayanto, Eko
BERKALA FISIKA 2015: Berkala Fisika Vol. 18 No. 1 Tahun 2015
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Abstract

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.
Petunjuk Penulisan Berkala Fisika Hidayanto, Eko
BERKALA FISIKA 2014: Berkala Fisika Vol. 17 No. 1 Tahun 2014
Publisher : BERKALA FISIKA

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Abstract

Vol 17 No.1 2014
Penentuan Kandungan Unsur Aluminium, Mangan dan Silikon dalam Air Sungai Code Terhadap Waktu Sampling dengan Metode AANC Hanim, Alfia; Azam, Much.; Hidayanto, Eko; Nuraini, Elin
BERKALA FISIKA Vol 10, No 1 (2007): Berkala Fisika
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Abstract

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
DISTRIBUSI DOSIS PHOTON MENGGUNAKAN TEKNIK 3DCRT DAN IMRT PADA RADIASI WHOLE PELVIC KARSINOMA SERVIKS Suhartono, Bambang Haris; Setia Budi, Wahyu; Hidayanto, Eko
BERKALA FISIKA 2014: Berkala Fisika Vol. 17 No. 4 Tahun 2014
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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
SINTESIS LAPISAN TIPIS SENG OKSIDA DIDOPING PERAK (ZnO:Ag) DAN APLIKASINYA UNTUK PENDEGRADASI POLUTAN ORGANIK AIR Sutanto, Heri; Nurhasanah, Iis; Hidayanto, Eko
BERKALA FISIKA 2015: Berkala Fisika Vol. 18 No. 4 Tahun 2015
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Abstract

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
STUDI APLIKASI EFEK FOTOKATALIS ZnO:Ag DIKOMBINASI OZON PADA PROSES PENCUCIAN CABAI Sutanto, Heri; Arifin, Zaenal; Wibowo, Singgih; Hidayanto, Eko
BERKALA FISIKA 2015: Berkala Fisika Vol. 18 No. 2 Tahun 2015
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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.
PEMBUATAN LAPISAN FOTOKATALIS ZINC OXIDE (ZnO) DENGAN TEKNIK SPRAY COATING DAN APLIKASINYA PADA PENGERING JAGUNG Hidayanto, Eko; Sutanto, Heri; Firdausi, K Sofjan; Arifin, Zaenal
BERKALA FISIKA Vol 16, No 4 (2013): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

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
Co-Authors Abdul Rofiq Achmad Chalid Afif Afrio Rika. R Agus Joko Prasetyo Agus Romadhon Agus Subagio Ahmad Pradana Alfia Hanim Ali Khumaeni Ana Aprilia Annisa Tenri Maya 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 Dewi A. Insiano 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 Iva Nistiyanti Jhonwesly Manik Josepa ND Simanjuntak Jun Kawai K Sofjan Firdausi Lamtiyah Ikha Indriyana M Rizqi Aditya Rahman Mariatul Khiftiyah Miftahul Aziz Mohammad Haekal Mohd Hanafi Ali Muahamad Irsal Much. Azam Muchammad Azam, Muchammad Muhammad Irwanto Muhammad Nur Muharam Budi Laksono, Muharam Budi 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 Singgih Wibowo Sri Murni Susila Wardaya, Susila Takashi Yamamoto Teruo Tanabe Tiffany Rahma Novestiana Tina Melinda Tri Windarti Tunggul Drajat Mulatomo Ukhti Lailun Nisa Very Richardina Wahyu Setia Budi Wahyu Tri Cahyanto Yoyon Wahyono Yoyon Wahyono Zaenal Arifin