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All Journal IAES International Journal of Artificial Intelligence (IJ-AI) RADIASI: Jurnal Berkala Pendidikan Fisika Lontar Komputer: Jurnal Ilmiah Teknologi Informasi BERKALA FISIKA Jurnal Ilmu Lingkungan Jurnal Sains dan Teknologi Jurnal Ilmiah Teknik Elektro Komputer dan Informatika (JITEKI) JURNAL FISIKA Jurnal Teknologi Informasi dan Ilmu Komputer Journal of Mathematical and Fundamental Sciences JUITA : Jurnal Informatika International Journal of Advances in Intelligent Informatics JFA (Jurnal Fisika dan Aplikasinya) Khazanah Informatika: Jurnal Ilmu Komputer dan Informatika Jurnal Fisika FLUX JOIN (Jurnal Online Informatika) Science and Technology Indonesia JOIV : International Journal on Informatics Visualization Jurnal RESTI (Rekayasa Sistem dan Teknologi Informasi) Indonesian Journal of Physics and Nuclear Applications Jurnal Penelitian Pendidikan IPA (JPPIPA) INDONESIAN JOURNAL OF APPLIED PHYSICS BAREKENG: Jurnal Ilmu Matematika dan Terapan Indonesian Journal of Chemistry JTAM (Jurnal Teori dan Aplikasi Matematika) Zero : Jurnal Sains, Matematika, dan Terapan Jurnal Nasional Pendidikan Teknik Informatika (JANAPATI) MAJAMATH: Jurnal Matematika dan Pendidikan Matematika ComTech: Computer, Mathematics and Engineering Applications Jurnal Linguistik Komputasional Jurnal Abdi Insani Indonesian Journal of Electrical Engineering and Computer Science Jurnal Sains dan Edukasi Sains Jurasik (Jurnal Riset Sistem Informasi dan Teknik Informatika) SPEKTA (Jurnal Pengabdian Kepada Masyarakat : Teknologi dan Aplikasi) Jurnal Teknik Informatika (JUTIF) Journal of Science and Science Education Advance Sustainable Science, Engineering and Technology (ASSET) International Journal of Community Service Proceeding ISETH (International Summit on Science, Technology, and Humanity) Prosiding University Research Colloquium Jurnal Informatika: Jurnal Pengembangan IT SJME (Supremum Journal of Mathematics Education) Lontar Komputer: Jurnal Ilmiah Teknologi Informasi

Suryasatriya Trihandaru

Universitas Kristen Satya Wacana

Author-ID : 405650

Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Transportation Other

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Solusi Model Aliran Gas Dalam Pipa pada Kondisi Line Packing Menggunakan Skema Richtmyer Harry Budiharjo Sulistyarso; Suryasatriya Trihandaru; Leksono Mucharam; Septoratno Siregar; Ivanky Saputra; Sinatra Canggih
Journal of Mathematical and Fundamental Sciences Vol. 36 No. 2 (2004)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.sci.2004.36.2.5

Line packing is a process storing gas in pipeline by increasing inlet gas flow rate while outlet gas flow rate is kept constant. This difference of gas flow rate causes the gas flow in pipeline being transient. Line packing process is intended to guarantee gas supply when trouble occurs. In this paper, a transient model with boundary condition is solved numerically using Richtmyer scheme, because stability analysis showed that Richtmyer scheme is better than other explicit schemes. In the case presented, it is shown that Richtmyer scheme sufficiently agrees with the real data in gas pipeline transmission, which is in many cases unsteady-state.

Effects of air pressure changes on gamma linear attenuation coefficient in the air Wandi Wantoro; Suryasatriya Trihandaru; Alvama Pattiserlihun
Journal of Science and Science Education Vol 1 No 2 (2017): JoSSE Vol. 1 No. 2 (November 2017)
Publisher : Faculty of Science and Mathematics, Universitas Kristen Satya Wacana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24246/josse.v1i2p55-61

The measurements of gamma linear attenuation coefficient in the air at variance air pressure has been done. The measurements were performed to determine the effects of air pressure changes on gamma linear attenuation coefficient in the air. The measurements were used Co-60 as the gamma radiation source and LND 72 Geiger-Muller as the radiation detector in a room with 18oC room temperature and 68% air humidity. The linear attenuation coefficient value was calculated according to Lambert-Beer law. From the measurement, we obtained the attenuated gamma intensity in the air at air pressure variation. The unattenuated gamma intensity was determined by making a linear fit function of the attenuated gamma intensity data. From the calculation, It was found that the value of gamma linear attenuation coefficient in the air increases with the increasing of air pressure.

Perancangan Pengukuran Akurasi Jarak Menggunakan Phantom Silicone Pada Kontrol Kualitas Ultrasonografi dengan Teknik Komputasi Dwi Pangestuti; Giner Maslebu; Suryasatriya Trihandaru
Jurnal Sains dan Edukasi Sains Vol 2 No 1 (2019): Jurnal Sains dan Edukasi Sains
Publisher : Faculty of Science and Mathematics, Universitas Kristen Satya Wacana, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24246/juses.v2i1p36-41

Penelitian ini bertujuan untuk melakukan uji kualitas USG dengan melakukan komputasi perhitungan jarak pada citra USG dan melakukan analisis pengukuran jarak menggunakan phantom silicone. Perancangan dan implementasi penelitian menggunakan metode pengolahan citra digital untuk melakukan komputasi dan melakukan pengukuran. Nilai citra dilakukan variasi frekuensi dan depth (kedalaman). Variasi depth (kedalaman) rata rata jarak real pada phantom adalah objek 1 sebesar 1 cm dari permukaan, objek 2 sebesar 2 cm dari permukaan, objek 3 sebesar 3 cm dari permukaan dan setelah dilakukan perhitungan menggunakan komputasi didapatkan hasil jarak sebenarnya objek dari permukaan. Pada frekuensi 3.5 MHz, kedalaman visualisasi maksimum pada objek 1 tersebut didapatkan nilai jarak rata rata komputasi sebesar 1.0039 cm dengan nilai deviasi 0.0814 sehingga nilai kesalahan jarak real sebesar 0.39%. Nilai kedalaman visualisasi objek 2 didapatkan hasil jarak rata rata komputasi sebesar 1.4897 cm dengan nilai deviasi sebesar 0.0099 sehingga nilai kesalahan jarak real sebesar 25.51%. Nilai visualisasi kedalaman Objek 3 yang memiliki jarak rata-rata komputasi sebesar 3.3336 cm dengan nilai deviasi 0.1191 sehingga nilai kesalahan jarak real sebesar 11.12%. Pada frekuensi tetap 4.5 MHz, kedalaman visualisasi maksimum pada objek 1 tersebut didapatkan nilai jarak rata rata komputasi sebesar 0.9931 cm dengan nilai deviasi 0.05 sehingga nilai kesalahan jarak real sebesar 0.69%. Nilai kedalaman visualisasi objek 2 didapatkan hasil jarak rata rata komputasi sebesar 1.6584 cm dengan nilai deviasi sebesar 0.0573 sehingga nilai kesalahan jarak real sebesar 17.08%. Nilai visualisasi kedalaman Objek 3 yang memiliki jarak rata-rata komputasi sebesar 3.4943 cm dengan nilai deviasi 0.0741 sehingga nilai kesalahan jarak real sebesar 16.47%. Dari semua hasil komponen uji menunjukkan perhitungan jarak pada citra pesawat USG bisa dilakukan dengan menggunakan perangkat lunak computer.

Desain Beam Shaping Assembly (BSA) berbasis D-D Neutron Generator 2,45 MeV untuk Uji Fasilitas BNCT Desman P. Gulo; Suryasatriya T.; Slamet Santosa; Y. Sardjono
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 5, No 02 (2015): IJAP Volume 05 Issue 02 Year 2015
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v5i02.280

Boron Neutron Capture Therapy (BNCT) is one of the cancer treatments that are being developed in nowadays. In order to support BNCT treatment for cancer that exists in underneath skin like breast cancer, the facility needs a generator that is able to produce epithermal neutron. One of the generator that is able to produce neutron is D-D neutron generator with 2.45 MeV energy. Based on the calculation of this paper, we found that the total production of neutron per second (neutron yield) from Neutron Generator (NG) by PSTA-BATAN Yogyakarta is 2.55×1011 n/s. The energy and flux that we found is in the range of quick neutron. Thus, it needs to be moderated to the level of epithermal neutron which is located in the interval energy of 1 eV to 10 KeV with 109 n/cm2s flux. This number is the recommendation standard from IAEA. Beam Shaping Assembly (BSA) is needed in order to moderate the quick neutron to the level of epithermal neutron. One part of BSA that has the responsibility in moderating the quick neutron to epithermal neutron is the moderator. The substance of moderator used in this paper is MgF2 and A1F3. The thickness of moderator has been set in in such a way by using MCNPX software in order to fulfill the standard of IAEA. As the result of optimizing BSA moderator, the data obtain epithermal flux with the total number of 4.64×108 n/cm2/s for both of moderators with the thickness of moderator up to 15 cm. At the end of this research, the number of epithermal flux does not follow the standard of IAEA. This is because the flux neutron that is being produced by NG is relatively small. In conclusion, the NG from PSTA-BATAN Yogyakarta is not ready to be used for the BNCT treatment facility for the underneath skin cancer like breast cancer.

COORDINATION STATE AND AGGREGATION PROCESS OF BACTERIOCHLOROPHYLL A AND ITS DERIVATIVES : STUDY ON ACETONE-WATER AND METHANOL-WATER SOLVENTS Heriyanto Heriyanto; Suryasatriya Trihandaru; Leenawaty Limantara
Indonesian Journal of Chemistry Vol 9, No 1 (2009)
Publisher : Universitas Gadjah Mada

Research on bacteriochlorophyll (BChl) a and its derivatives had been conducted to determine the coordination state and the aggregation process in acetone-water and methanol-water. The results showed that there were mainly two absorption peaks in BChl a and its derivatives, namely: Qx and Qy that were very sensitive to coordination state and aggregation process. The coordination state of pigment could be determined based on Qx absorption peak that was influenced by solvents. In addition, the donor number (DN) and taft parameters (β and π*) from each sovents could also be used to determine the coordination state. One or two of axial coordination toward center metal of BChl a and its derivatives have to be filled by donor electron as a foreign nucleophile. Mg-BChl was exist as five-coordinate complexes in acetone but as six-coordinate complexes in methanol. Five-coordinate complexes of Zn-BChl was occurred either in acetone or methanol. Cu-BChl was exist as four-coordinate complexes in acetone but altered to five-coordinate complexes in methanol. The agregation process was influenced by the existence of water added in pigment solution. The order of Mg-BChl a and its derivatives abilities to form new aggregate in acetone-water and methanol-water, in regard of water-addition percentage was as follow: Cu-BChl > Zn-BChl > Mg-BChl. Methanol was the solvent that could form aggregate of Mg-BChl and its derivatives at lower water-addition percentage compared to acetone.

Determination of Stevioside and Rebaudioside A in Stevia rebaudiana Bertoni Leaves Using near Infrared Spectroscopy and Multivariate Data Analysis Yohanes Martono; Suryasatriya Trihandaru; Ferdy Semuel Rondonuwu
Indonesian Journal of Chemistry Vol 18, No 4 (2018)
Publisher : Universitas Gadjah Mada

Rebaudioside A and stevioside are abundant steviol glycoside contained in Stevia rebaudiana leaves. These components are widely used as a natural sweetener. The objective of this study was to develop rapid determination method of stevioside, and rebaudioside A in S. rebaudiana leaves using near infrared trans-reflectance spectroscopy (NIRS) combined with multivariate analysis. The reference method used was HPLC. A prediction model was developed using partial least square (PLS) regression. Calibration parameters were calculated based on a calibration set of various stevioside, rebaudioside A from 23 samples. Performance of PLS model was assessed in term of optimum determination coefficient (R2), and minimum root mean square error of cross-validation (RMSEV). Validation of PLS model was performed using cross-validation and leave one out calibration of PLS component. Rebaudioside A has well PLS model in wavenumber region of 4100–5100 cm-1, and stevioside determination using difference wavenumber region of 4760-5016 cm-1. PLS model for total (sum of stevioside and rebaudioside A content) was exploited in wavenumber region of 4568-4928 cm-1. NIRS in combination with multivariate data analysis of PLSR can be applied as a rapid method for determining rebaudioside A and the total amount of steviol glycosides in S. rebaudiana leaves.

Susceptible Vaccine Infected Removed (SVIR) Model for COVID-19 Cases in Indonesia Hanna Arini Parhusip; Suryasatriya Trihandaru; Bernadus Aryo Adhi Wicaksono; Denny Indrajaya; Yohanes Sardjono; Om Prakash Vyas
Science and Technology Indonesia Vol. 7 No. 3 (2022): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Analysis of data on COVID-19 cases in Indonesia is shown by using the Susceptible Vaccine Infected Removed (SVIR) in this article. In the previous research, cases in the period March-May 2021 were studied, and the reproduction number was computed based on the Susceptible Infected Removed (SIR) model. The prediction did not agree with the real data. Therefore the objective of this article is to improve the model by adding the vaccine variable leading to the new model called the SVIR model as the novelty of this article. The used data are collected from COVID-19 cases of the Indonesian population published by the Indonesian government from March 2020-April 2022. However, the vaccinated persons with COVID-19 cases have been recorded since January 2022. Therefore the models rely on the period January 2021-March 2022, where the parameters in the SIR and SVIR models are determined in this period. The method used is discretizing the models into linear systems, and these systems are solved by Ordinary Least Square (OLS) for time-dependent parameters. It is assumed that the birth rate and death rate in the considered period are constant. Additionally, individuals who have recovered from COVID-19 will not be infected again, and vaccination is not necessarily twice. Furthermore, individuals who have been vaccinated will not be infected with the COVID-19 virus. The SVIR model has captured 3 waves of COVID-19 cases that are appropriate to the real situation in Indonesia from January 2021-March 2022. Additionally, the reproduction numbers as functions of time have been generated. The fluctuations of reproduction numbers agree with the real data. For further research, different regions such as districts in Java and other islands will also be analyzed as the implication of this research.

Kajian Metode Analisa Data Goal Seek (Microsoft Excel) untuk Penyelesaian Persamaan Schrödinger Dalam Menentukan Kuantisasi Energi Dibawah Pengaruh Potensial Lennard-Jones Wahyu Kurniawan; Suryasatriya Trihandaru; Alvama Pattiserlihun
Jurnal Fisika Vol 5, No 2 (2015)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v5i2.7423

Penyelesaian persamaan Schrödinger dengan berbagai model potensial merupakan konsep dasar yang harus dipahami dengan baik oleh mahasiswa ketika belajar mekanika kuantum. Hal ini sangat penting dilakukan dengan tujuan memberikan gambaran perilaku zarah dibawah pengaruh potensial tersebut dimana solusi pemecahannya berupa fungsi gelombang yang memuat informasi penting tentang perilaku gelombang yang ditunjukkan dengan energi terikatnya. Seperti penelitian yang telah dilakukan sebelumnya, pada penelitian ini kasus yang ingin diteliti adalah model potensial Lennard-Jones dengan menggunakan metode analisa goal seek yang tersedia pada Microsoft excel. Persamaannya dijabarkan dengan metode Euler terlebih dahulu dan syarat batas ditentukan agar ketelitian hasil diperoleh. Agar perhitungan goal seek dapat dilakukan maka harus diubah dari besaran fisis menjadi besaran yang tidak berdimensi dimana parameter tersebut adalah v yang didefinisikan sebagai dan nilai yang akan menunjukkan kuantisasi energi. Parameter v ini menunjukkan keklasikan suatu sistem. Hasil yang diperoleh adalah bahwa dengan memasukkan parameter kontrol nilai v tertentu, telah diperoleh beberapa keadaan energi dengan batas zkiri dan zkanan tertentu. Ketika masukan parameter v yang diberikan semakin besar keadaan energinya pun lebih rapat (ditunjukkan energy state yang diperoleh semakin banyak) dibandingkan bila masukan v-nya lebih kecil. Penelitian ini bermanfaat untuk menyederhanakan kasus potensial yang lebih rumit, dimana solusinya dapat diperoleh dengan mudah dan konsep kuantisasi energi akibat model potensial L-J dapat dipahami secara utuh.

Media Pembelajaran Alat Ukur Koefisien Gesek Kinetis dengan Tetikus Nirkabel Alvama Pattiserlihun; Suryasatriya Trihandaru; Inti Mustika
Jurnal Fisika Vol 7, No 1 (2017)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jf.v7i1.13365

Media pembelajaran adalah salah satu hal yang sangat dibutuhkan untuk membantu memantapkan konsep (maha)siswa, tidak terkecuali untuk pematangan konsep Fisika khususnya tentang koefisien gesek kinetis. Penelitian ini bertujuan untuk membuat media pembelajaran sederhana terkait materi koefisien gesek kinetis, mengukur koefisien gesek kinetis menggunakan media tetikus nirkabel dengan optimasi parameter dari data GLBB serta mencari nilai sudut kritis pada gerak benda di bidang miring. Penelitian ini dilakukan dengan menggunakan papan yang kemiringannya bisa diatur, tetikus nirkabel, komputer dan software Matlab. Pengambilan data dilakukan sebanyak 40 kali dan hasilnya kemudian di uji menggunakan t- test. Didapatkan bahwa rata- rata nilai koefisien gesek untuk ketiga sudut tak terbedakan sebesar 0,41 dengan simpangan baku 0,03. Dimana sudut kritis yang diperoleh adalah sebesar 22,29o.

Simulasi Komputasi Lokasi dan Orientasi Kanker pada ORNL-MIRD Abigail Geofani Boham; Suyasatriya Trihandaru; Andreas Setiawan
Prosiding University Research Colloquium Proceeding of The 11th University Research Colloquium 2020: Bidang Sains dan Teknologi
Publisher : Konsorsium Lembaga Penelitian dan Pengabdian kepada Masyarakat Perguruan Tinggi Muhammadiyah 'Aisyiyah (PTMA) Koordinator Wilayah Jawa Tengah - DIY

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2662.79 KB)

Treatment Planning System (TPS) harus dilakukan sebelum fraksi radioterapi. Dalam tahap ini dilakukan simulasi untuk pendistribusian dosis radiasi, salah satunya adalah pemodelan computational phantom ORNL- MIRD (Oak Ridge National Laboratory- Medical Internal Radiation Dose) model manusia, yang paling sering digunakan pada kebutuhan simulasi Monte Carlo. Terkadang simulasi letak dan orientasi kanker sering diabaikan pada saat penginputan file kode MCNP dalam perhitungan Monte Carlo, yang mempengaruhi sudut penyinaran dan juga efisiensi waktu TPS. Penelitian ini bertujuan untuk mesimulasikan orientasi dan lokasi kanker pada simulasi ORNL-MIRD yang diasumsikan sebagai bentuk ellipsoid tunggal terhadap jantung. Dengan melakukan pendekatan geometri ellipsoid, maka didapatkan suatu formula baru dimana konstanta di dalamnya merupakan kebutuhan file kode MCNP. Formula baru ini mengandung nilai rotasi dan translasi dari ellipsoid yang diasumsikan merupakan bentuk geometri dari kanker. Sebagai uji simulasi diaplikasikan pada phantom ORNL-MIRD, dihasilkan konstanta Surface Card mnemonic GQ pada kode MCNP untuk kebutuhan simulasi sebesar A = 0.036; B = 0.0044; C = 0.0019; D = 0; E = 0; F = 0.0028; G = -1.5445; H = 0; I = -1.1154; J = 215.3605 dalam pixel dengan jarak titik pusat kanker ke jantung adalah (x,y) adalah sebesar 95.566, 216.689 dan orientasi sebesar -59.680 rad .

Co-Authors Abigail Geofani Boham Adi Setiawan Adita Sutresno Adrianus Herry Heriadi Adrianus Herry Heriadi Alvama Pattiserlihun Alvama Pattiserlihun Alvama Pattiserlihun Ambat, Jordi Enal Andreas Setiawan Ariany Mahastanti, Linda Bambang Susanto Bambang Susanto Bernadus Aryo Adhi Wicaksono Carolina Febe Ronicha Putri Daniel Eliazar Latumaerissa Denny Indrajaya Denny Indrajaya Desman P. Gulo Dian Widiyanto Chandra Didit Budi Nugroho Djoko Hartanto Djoko Hartanto Dwi Pangestuti Fachrurrozi Fachrurrozi Fachrurrozi Ferdy S. Rondonuwu Ferdy Semuel Rondonuwu Ferri Rusady Saputra Giner Maslebu Goni, Abdiel Wilyar Haay, Happy Alyzhya Hanna Arini Parhusip Hanna Arini Parhusip Harendza, David Hariadi, Adrianus Herry Harry Budiharjo Sulistyarso Heriadi, Adrianus Herry Heriyanto Heriyanto Indrajaya, Denny Inti Mustika Ivanky Saputra Jane Labadin Johanes Dian Kurniawan Johanes Dian Kurniawan Johanes Dian Kurniawan Karina Bianca Lewerissa Kristoko Dwi Hartomo Kurniawan, Johanes Dian Laurentius Kuncoro Probo Saputra, Laurentius Kuncoro Probo Lea, Lea Leenawaty Limantara Leksono Mucharam Lilik Linawati Linda Ariany Mahastanti Made Rai Suci Shanti Nurani Ayub Mohamad Hidayatullah Muninggar, Puput Retno Natalia Diyaning Gulita Om Prakash Vyas Parung, Ratu Anggriani Tangke Petrus Priyo Santosa Prayitno, Gunawan Puspasari, Magdalena Dwi Rahmawanto, Setya Budi Riana Amalia Rony, Zahara Tussoleha Santosa, Petrus Priyo Sari, Devina Intan Sebastian, Danny Septoratno Siregar Silamai Tya Mariani Famani Sinatra Canggih Siti Fatimah Slamet Santosa Slamet Santosa Sri Yulianto Joko Prasetyo Susetyo, Yosia Adi Sutarto Wijono Utari, Galuh Retno Victory Immanuel Ratar Wahyu Kurniawan Wahyu Kurniawan Wandi Wantoro wendelina anggriani Winarto, Eduardus Albert Y. Sardjono Yayi Suryo Prabandari Yenusi, Yuni naomi Yohanes Martono Yohanes Sardjono Yohanes Sardjono Yohanes Sardjono Yohanes Sardjono, Yohanes Yohannes Sardjono Yuliawan, Kristia

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