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All Journal Buletin Udayana Mengabdi Bumi Lestari Jurnal Sains Materi Indonesia Jurnal Neutrino Journal of Mathematical and Fundamental Sciences BULETIN FISIKA Jurnal Fisika Indonesia
Ni Nyoman Rupiasih
Department Of Physics, Faculty Of Mathematics And Natural Sciences, University Of Udayana
Agriculture, Biological Sciences & Forestry Humanities Astronomy Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Mathematics Physics

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Pengolahan Film Radiografi Secara Otomatis Menggunakan Automatic X-Ray Film Processor Model Jp-33 Zoucella Andre Afani; Ni Nyoman Rupiasih
BULETIN FISIKA Vol 18 No 2 (2017): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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A research on the process of forming an image on a radiographic film and processing techniques automatically has been done. The study was conducted using an X-ray plane Toshiba E 7239, Fil AGFA Healtcare HV Septestraat 27B2640 Mortsel and an automatic film processing "Automatic X-Ray Film Processor Model JP-33". The experimental results showed that the principle of automatic film processing is the same as the principle of film processing manually, except in automatic film processing there is no rinsing stage. Automatic film processing can save time and costs; also it can reduce the possibility of errors due to human factors.
PENGARUH PERLAKUAN MIKROGRAVITASI PADA BIJI CABAI RAWIT TERHADAP LAJU PERTUMBUHAN TANAMAN CABAI RAWIT (CAPSICUM FRUTESCENS L.) Ni Luh Yuni Pramita Utami; Ni Nyoman Rupiasih; I Wayan Supardi
BULETIN FISIKA Vol 18 No 1 (2017): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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The study has been done on the effect of microgravity on cayenne pepper seed (Capsicum frutescens L.) on the growth rate and percentage of live of cayenne pepper plant. Microgravity is simulated by 2-D clinostat with the rotation speed of 2.7 rpm (1.22 × 10-4 g). The microgravity treatments werevariatewith time, known for 12 h (S1), 24 h (S2), and 48 h (S3).The seeds that have been clinorotated were planted in normal gravity environment, 1 g. Plant height and percentage of life measurements were carried out every dayduring the vegetative phase of plant of 0-40 days. The results showed that microgravity treatment on seeds gives positive effect on the growth rate of the cayenne pepper plant.
The effect of various disturbances on the seeds on the content of chlorophyll a, chlorophyll b, carotenoids, and biomass of cayenne pepper Seedlings Ni Nyoman Rupiasih; Ni Kadek Gita Hari Yanti; Made Sumadiyasa; I.B.S. Manuaba
BULETIN FISIKA Vol 19 No 1 (2018): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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Study on the effect of various disturbances on the cayenne pepper seeds (Capsicum Frutescens L.) to the content of chlorophyll a, chlorophyll b, carotenoids, and biomass of the plants in the germination period have been done. The disturbances given include UV-C irradiation for 1 hour (S1), microgravity for 12 hours (S2), for 24 hours (S3), and for 48 hours (S4), as well as combined disturbances that are UV-C irradiation for 1 hour followed by microgravity for 12 hours (S5), for 24 hours (S6), and for 48 hours (S7). As comparison, it has been used seeds without treatment called control (S0). The microgravity environment was created using a 2-D clinostat with a rotational speed of 2.7 rpm (1.2 x 10-4 g). All samples were grown in normal gravity (1 g) environment. Observations were made during the vegetative phase until the plant was 40 days old. Measurements of chlorophyll a, chlorophyll b, carotenoids, and biomass were performed at the plants were 10, 20, and 40 days old. The results showed that disturbances which given on the seeds gave positive effects on the content of chlorophyll a, chlorophyll b, carotenoids, and biomass of the plants. The impacts depend on the duration of the disturbances given.
PERANCANGAN DAN PEMBUATAN SISTEM PENGENDALI ROBOT DENGAN MENGGUNAKAN ISYARAT PUPIL MATA I Wayan Supardi; Fahim Mamduh; N. Nyoman Rupiasih; Pt Widyatmika
BULETIN FISIKA Vol 13 No 1 (2012): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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It has designed and constructed a robot control system using positions eye pupil cues with motion detection method. The method detects changes in image as a process of movement. The image of the eye pupil was captured by a webcam and subsequently converted into a gray scale. To determine the direction of motion of the prototype robot, has been used the rules of segmentation e.g. the division of area of the image obtained. In every area of an image or segmentation unit will be set to a detector, and if there is movement in that area will be reported in the percentage of movement. Percentage value of the segmentation cells is fed to the parallel port so the prototype robot can move forward, turn right, turn left, and stop.
PENGARUH LAMA PENYINARAN UV-C PADA BIJI CABAI RAWIT(CAPSICUM FRUSTESCENT L) TERHADAP LAJU PERTUMBUHAN TANAMAN, KADAR KLOROFIL-A DAN KERAPATAN STOMATA DAUN SERTA KADAR KAPSAISIN BUAH CABAI RAWIT R.A Restia Pranagari; Ni Nyoman Rupiasih; Hery Suyanto
BULETIN FISIKA Vol 15 No 2 (2014): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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While irradiation of UV-C light has an effect on plant height, plant growth until the generative phase,chlorophyll-a content, stomatal density and concentration capsaicin chilies. Sample treatment on seeds /seedlings to ultraviolet C radiation (UV-C) respectively for 5 minutes, 15 minutes, 25 minutes, 30 minutes,35 minutes, 50 minutes, 1 hour, 2 hours, 6 hours, 8 hours, 24 hours and 48 hours. The results showed thatthe effect of ultraviolet-C irradiation on seed negative effect on the inhibition of germination of thevegetative phase. While the generative phase, the plant that gets the least amount of UV radiation dosestunted. Ultraviolet radiation on seed very negative effect on the levels of chlorophyll-a. Chlorophyll-alevels were at least 5 minutes in sample treatment (S1). Stomatal density of cayenne pepper plant seedstreated with UV-C irradiation had a greater stomatal density than the untreated plants. Capsaicin levelswhich are most numerous in the old bean chili with UV-C irradiation 2 hours (S8) is an average of 755.17mg / L each of chilies.
STUDI MEMBRAN KITOSAN DARI KULIT LOBSTER BAMBU SEBAGAI MEMBRAN FILTRASI Ni Nyoman Putri Windari; Ni Nyoman Rupiasih; Made Sumadiyasa
BULETIN FISIKA Vol 17 No 1 (2016): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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The study of the extraction and characterization of chitosan from skin waste of Bamboo Lobster (Panulirus versicolor) has been done. Chitosan is extracted using conventional method, namely the initial process: cleaning and drying (pretreatment), demineralization, deproteination, and deacetylation. The chitosan obtained has been used to prepare chitosan membrane 2% with acetic acid 1% as solvent. The membrane prepared by phase inversion method withprecipitation through solvent evaporation. The prepared membranes were characterized by FTIR spectrophotometer, Nova 1200e by BJH method and filtration method. The results obtained that degree of deacetylation (DD) of chitosan is 70.016%. The thickness of the membrane is 0.361 mm. The FTIR spectra show that functional groups obtained are -NH, -CH, C=O, C-O and -CN. From BJH method obtained that the pore radius is 1.69 nm and pore density is 8.95 x 105pores/m3. From the filtration method obtained that at each pressure, 80-85 kPa and 90-100 kPa, the PWF values are 381.232 and 454.545 L/m2.h, respectively.
EFEK LAMA PAPARAN RADIASI UV-C TERHADAP KARAKTERISTIK I-V MEMBRAN KITOSAN Putu Erika Winasri; Ni Nyoman Rupiasih; Made Sumadiyasa
BULETIN FISIKA Vol 15 No 1 (2014): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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An investigation of the effects of UV exposure particularly UV-C to the characteristics of the currentvoltage(I-V) of chitosan membrane 2% has been done. The electrolyte solution was NaCl withvarious concentration of 0.1 mM and 10 mM, time exposure 10, 20, 40 and 60 minutes, and theincreasing currents from 19 -24 ?A with increment of 0.5 ?A. Transport process is done by using amodel cell membrane consist of 2 chambers. The voltage difference of membrane is measured using acalomel electrode. In this study, chitosan membranes were exposure to UV radiation for 0-60 minutes.The I-V characterization is done by the current clamp method. The solution used is NaCl solution withthe concentration ratio of the both chambers (C1:C2) was 0.1 mM : 0.1 mM and the given currentswere from 19 -24 ?A with increment of 0.5 ?A. From the observations obtained, the I-V characteristicgraphs showed Ohmic's region, it has not showed limiting current density and overlimiting currentregion. The I-V characteristic graphs also shows that ion transport in NaCl solution (voltage can bemeasured) in the chitosan membrane system occurred at a certain current value. The increased oftime exposures resulted in a decrease of conductance of chitosan membrane to ions in NaCl solution.
PENGARUH KONSENTRASI DAN ION VALENSI LARUTAN TERHADAP RAPAT ARUS DIFUSI ION PADA MEMBRAN KITOSAN Umi Hariyani; Ni Nyoman Rupiasih; I Gde Antha Kasmawan
BULETIN FISIKA Vol 14 No 2 (2013): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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An investigation of the effect of concentration and ion valence of solution on the current density on biopolymer chitosan membrane has been done. The study aimed to determine the current-voltage characteristics of chitosan membrane especially for ion diffusion. Membrane used was chitosan membrane with matrix of 2%, and the electrolyte solution was NaCl (ionic valence+1) and CaCl2 (ionic valence+2), with various concentration of 0.1 mM, 1mM, 10mM, 100mM and 1000mM. Transport process is done by using a model cell membrane consisting of 2 rooms. The voltage difference of membrane is measured using “a calomel electrode of Activon AEP Single Jnct 12x120 mm”. From the observations obtained, the higher concentration difference in the both rooms and the greater value of ion valence, the current density of ionic diffusion increased, especially at the highest concentration difference e.g. 1000 mM: 0.1 mM, the diffusion force generated was large enough.
STUDI SINTESIS NANOPARTIKEL PERAK DENGAN METODE BIOLOGI MENGGUNAKAN TANAMAN SAMBILOTO (Andrographis paniculata Ness) Septiana Ribka Purnomo; Ni Nyoman Rupiasih; Made Sumadiyasa
BULETIN FISIKA Vol 18 No 1 (2017): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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This study is report about the synthesis of silver nanoparticles (AgNP) using biological method (biosynthesis) using sambiloto plant extracts (Andrographis paniculata Ness). Plant part used is the leaves and extract process is done with demineralized water (aqua-dm). The synthesis is done at a ratio of AgNO3 solution with sambiloto extract solution is 10 µl : 10 ml. Characterization techniques that have been made include UV-Vis spectrophotometer, X-ray diffraction (XRD) and Transmission Electron Microscope (TEM). The results showed that silver nanoparticles formed has absorbance of SPR (surface plasmon resonance) peak at a wavelength of about 423 nm. XRD characterization of the structure obtained FCC (face center cubic) with a lattice parameter is 4.031 Å, diffraction peaks at 2q = 38,18o, 45,81o and 64,87o each corresponding to the (h k l) of (1 1 1), (2 0 0) and (2 2 0) respectively. TEM characterization obtained that the particle size distribution is 10 – 30 nm.
Analysis Dosage of Boron in BNCT with Simulation Method Using PHITS (Particle and Heavy Ion Transport Code System) Program Laura Laudensia Senly Jalut; Ni Nyoman Rupiasih; Yohanes Sardjono
BULETIN FISIKA Vol 21 No 1 (2020): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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Abstrak – Cancer is a dangerous disease which is one of the main causes of death in the world, which is 8.8 million deaths in 2015. A new method has been developed for the treatment of cancer with small side effects, Boron Neutron Capture Therapy (BNCT). BNCT is based on the ability of non-radioactive isotopes Boron-10 to capture thermal neutrons. Boron is the main key of the BNCT process wherein, radiation of cancer cells can be carried out selectively if the cancer contains high concentrations of boron. Boron doses in cancer cells cannot be measured directly, therefore artificial network methods are used to compute doses computationally, namely the Monte Carlo method with the Particle and Heavy Ion Transport Code System (PHITS) program. Boron dose used was 10, 20 and 30 ?g/g. It was found that the greater the boron dose the greater the number of neutrons absorbed. The results showed that the largest absorption dose occurred in the Gross Tumor Volume (GTV) area of ??7.7076E-10 Gy/cm2. Key words: Cancer, BNCT, Dose of Boron, PHITS.
Co-Authors Angelia Bella Kusumaningtyas Decky Danuarta Fernanda Dewa Ayu Sukma Pranastia Dewa Ayu Sukma Pranastia Dewi Handayani Fahim Mamduh Hery Suyanto I B Sujana Manuaba I G. A. Widagda I Gde Antha Kasmawan I Gusti Agung Ayu Ratnawati I Ketut Putra I Made Hendra Hadinata I Made Oka Guna Antara I Wayan Supardi I. W. Sumarjaya I.B.S. Manuaba I.W. Sumarjaya Ida Ayu Putu Inten Gayatri Ida Wisnu Sari James Sibarani K N Suarbawa Komang Dharmawan Laura Laudensia Senly Jalut M. Joni Made Sumadiyasa Maria Yulni Imas Maulida Nirwana Islami Ni Kadek Gita Hari Yanti Ni Kadek Gita Hari Yanti Ni Luh Yuni Pramita Utami Ni Made Rasmini Ni Nyoman Putri Windari Ni Wayan Eri Sandriani Ni Wayan Eri Sandriani Nyoman Wendri Nyoman Wndri P. B. Vidyasagar P. Suardana Pt Widyatmika Putu Erika Winasri Putu Ika Paramitha Putri R.A Restia Pranagari Ratih Wulandari Ria Yuliani S. S. Jagtap Septiana Ribka Purnomo Umi Hariyani Wolfharditia Oktaviana Nita Yan Ramona Yohanes Sardjono Yosefa Yakunda Tandu Zoucella Andre Afani