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All Journal Jurnal Sains Dasar INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Teras Fisika : Teori, Modeling, dan Aplikasi Fisika Jurnal Ilmu Fisika dan Terapannya (JIFTA) Wahana Fisika : Jurnal Fisika dan Terapannya
Denny Darmawan
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Astronomy Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Mathematics Physics

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A study of frustrated system in 2 dimensional triangular lattice antiferromagnet using the Ising model Noor Rika Safitri; Aini Rahmatun Ummi Fadlilah; Denny Darmawan; Yosi Aprian Sari
Jurnal Sains Dasar Vol 2, No 2 (2013): October 2013
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jsd.v2i2.3294

Abstract

Abstract This research was aimed to simulate the ground state and magnetization of antiferromagnet under the influence of temperature and competing interaction. The effect of competing interaction to phase transition was also investigated. The competition occurred between the nearest neighbour interaction and the next nearest neighbour interaction in the triangular lattice. The simulation was done using the 2 dimensions Ising model with Monte Carlo method combined with Metropolis algorithm. The results showed that the ground state energy increased significantly at the critical temperature (Neel’s temperature). When the competing interaction increased, the ground state energy of the lowest temperature decreased. Based on the magnetization, due to the increase of the competing interactions, the phase transitionfrom antiferromagnet to paramagnet occurred at a higher Neel’s temperature.   Key words: antiferromagnet, Ising model, competing interaction, Neel’s temperature
SIMULATION ANALYSIS OF THE TOTALLY ASYMETRIC SIMPLE EXCLUSION PROCESS TO DETERMINE THE PROFIL OF THE ONE-BODY CORRELATION FUNCTION, TWO-BODY CORRELATION FUNCTION, AND THREE-BODY CORRELATION FUNCTION AROUND THE ENDS OF THE LATTICE WITH LATTICE NUMBER VARIATION R. A. Adipurno; Wipsar Sunu Brams Dwandaru; Denny Darmawan; Bambang Ruwanto
Jurnal Sains Dasar Vol 4, No 1 (2015): April 2015
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (82.298 KB) | DOI: 10.21831/jsd.v4i1.8427

Abstract

This study aimed to determine the behavior of one-body, two-body, and three-body correlation functions of the model dynamics TASEP with sequential updating rules and open boundary conditions on vehicular traffic around the end of the traffic light. The study began with the determination of algorithm to model the dynamics of TASEP and coding, with the variation of the input rate (α) , the output rate (β), and the number of  lattice sites (N). Then the program  run with specific time limit (t) and number of  systems (M). The value of the one-body correlation function determines the average occupancy of particles in lattice site-i at time t. Two-body correlation function determines the average occupancy of particle at site-i when there is another particle occupying the nearest neighbor lattice, i+1, at time t. Three-body correlation function determines the average occupancy of particles to occupy lattice site-i when there are other particles occupying the nearest and next nearest neighbor lattice sites, i+1 and i+2, at time t. The value of the one-body correlation function turns out to be larger than the value of the two-body correlation function. The value of the two-body correlation function is larger than the value of the three-body correlation function for all phases. The correlation between a vehicle to another vehicle will be even greater. Keywords:     TASEP, sequential updating, n-body correlation function
Temperature control system for infant incubator using DS18B20 sensor Laila Katriani; Arif Setiawan; Denny Darmawan
Jurnal Sains Dasar Vol 3, No 2 (2014): October 2014
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2307.043 KB) | DOI: 10.21831/jsd.v3i2.4098

Abstract

A temperature control system for infant incubator using DS18B20 had been built. The dimension of the incubator was 45 x 35 x 35 cm3 and it used 200 W incandescent lamp as an heater element. The system was automated using ATMEGA328P and Triac as an actuator. It succeeded in keeping the incubator temperature at (36.5 ± 0.1) °C. It took around 10 minutes to reach the working temperature of 36.5 °C from room temperature of 26 °C.   Key words: temperature control system, infant incubator, DS18B20
DEVELOPMENT OF UV-BOX CONTROL SYTEM PROTOTYPE FOR STERILIZATION MEDIA USING PHOTODIODE SENSOR Laila Katriani; Denny Darmawan; Ahmad Awaluddin Noer
Jurnal Sains Dasar Vol 4, No 1 (2015): April 2015
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1210.81 KB) | DOI: 10.21831/jsd.v4i1.8444

Abstract

This research aims to design a UV box control system as sterilization media using photodiode sensor. The study began in June until November 2014. The study was conducted at the Laboratory of Electronics and Instrumentation, Department of Physics Education, State University of Yogyakarta. The design of the UV box control system consists of two stages, namely, the design of the hardware and software design. Hardware design consists of a power supply design, sensor design,  comparator design, and a buzzer. Based on the results of tests that have been done shows the power supply voltage of 4.86 volts, the reference voltage of 3.76 volts, the comparator output voltage when low of 0.12 volts, the comparator output voltage when high of 3.0 volts. Keywords: UV-Box, Sterilization Media, photodiode
Microtremor characteristics and analysis of seismicity on Opak fault lines, Bantul district, Yogyakarta Merizka Marsyelina; Nugroho Budi Wibowo; Denny Darmawan
Jurnal Sains Dasar Vol 3, No 1 (2014): April 2014
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2254.022 KB) | DOI: 10.21831/jsd.v3i1.2800

Abstract

This research aimed to determine the microtremor characteristics and seismicity analysis around Opak’s fault in  Jetis subdistrict, Imogiri subdistrict,  Pundong  subdistrict, and Kretek subdistrict. This research using HVSR (Horizontal to Vertical Spectral Ratio) method, spectrum analysis, TFA analysis and maximum likelyhood method. The primary microtremor’sdata was taken from 9 points and thesecondary data from 32 point using grid 3 km spacing. The data record the natural waves or seismic signals at each measurement points. The processed data thus characterize the structrure of the soil and rock layers. For seismicity of analysis earthquake data since 2006-2014 from BMKG were used. The results indicate microtremor characteristics around the fault Opak according to the parameter map predominant frequency modeling result, map predominant period modeling result, map amplification factor modeling result, map Vs30 modeling result, curve H/V, curve spectrum and curve TFA which is divided into three zones. Seismicity analysis showed that earthquake around Opakfault earthquake has magnitude between  0,4 to 3,2,  has a depthof 10 km to 20 km, and has a  b-value of 0,44 to 0,76.   Key words: HVSR method, TFA analysis, spectrum analysis, maximum likelihood method, microtremor characteristics, b-value, Opak fault
Electromagnetics Properties of Non-Relativistic Deuteron in Ground State R. Yosi Aprian Sari; Denny Darmawan
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 6, No 01 (2016): IJAP VOLUME 06 ISSUE 01 YEAR 2016
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v6i01.1802

Abstract

Proton-neutron interaction that makes up deuteron is a mixture state of ????13 dan ????13, which are each associated with a state ????=0, ????=1 and ????=2, ????=1. In the proton-neutron interaction, there are particle exchanges of medium range (1 fm≤????≤2 fm) i.e. scalar meson exchange and the long range (????>2 fm) i.e. one pion exchange. The electromagnetic properties of non-relativistic deuteron in the ground state can be found from the coupled differential equation, such as magnetic dipole moment, 〈????D〉=0.856521???????? and electrical quadrupole moment, 〈????D〉=0.00291396 b.
Identifikasi daerah rawan tanah longsor menggunakan metode geolistrik di desa Karangtengah kecamatan Imogiri kabupaten Bantul Denny Darmawan; Phisca Maulana Zaky Ichsany
Jurnal Teras Fisika: Teori, Modeling, dan Aplikasi Fisika Vol 6 No 1 (2023): Jurnal Teras Fisika: Teori, Modeling, dan Aplikasi Fisika
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jtf.2023.6.1.7952

Abstract

Tujuan penelitian ini adalah mengetahui nilai resistivitas lapisan tanah dan struktur bawah permukaan di daerah rawan tanah longsor. Penelitian ini menggunakan metode geolistrik konfigurasi dipole-dipole di daerah rawan tanah longsor Desa Karangtengah, Kecamatan Imogiri, Kabupaten Bantul dengan koordinat daerah penelitian 7,9430° LS sampai 7,9401° LS dan 110,3962° BT sampai 110,3939° BT. Pengambilan data menggunakan resistivitymeter merek Syscal. Panjang setiap lintasan yaitu 200 meter dengan jarak tiap elektroda 10 meter. Struktur bawah permukaan daerah penelitian terdiri dari material lempung dengan nilai resistivitas dari 3,39 Ωm sampai dengan 58,3 Ωm dan material batu pasir dengan nilai resistivitas dari 58,4 Ωm sampai dengan 319,89 Ωm. Hasil penelitian menunjukkan bahwa material lempung mendominasi daerah tersebut, sehingga ketika terjadi hujan dengan intensitas tinggi dapat berpotensi longsor karena kemiringan lereng lebih dari 40°. Bidang gelincir daerah penelitian belum terlihat hingga kedalaman 21,8 meter, sehingga diperkirakan bidang gelincir berada di kedalaman lebih dari 21,8 meter.
ANALISIS LITOLOGI LAPISAN SEDIMEN BERDASARKAN METODE HVSR DAN DATA BOR DI KAWASAN JALUR SESAR OPAK ANALYSIS OF SEDIMENT LAYER LITHOLOGY BASED ON HVSR METHOD AND BOREHOLE DATA IN OPAK FAULT LINES AREA Arif Sudrajat; Nugroho Budi Wibowo; Denny Darmawan
Jurnal Ilmu Fisika dan Terapannya (JIFTA) Vol 6, No 2 (2017): Jurnal Fisika
Publisher : Prodi Fisika, Departemen Pendidikan Fisika

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Abstract

AbstrakTelah dilakukan penelitian tentang analisis litologi lapisan sedimen di kawasan jalur Sesar Opak.Penelitian ini bertujuan untuk mengetahui variasi kedalaman lapisan sedimen dan memetakan zona rawan gempa berdasarkan metode HVSR dan data bor di kawasan jalur Sesar Opak. Penelitian ini dilakukan di wilayah jalur Sesar Opak yang berada di daerah Bantul hingga Prambanan pada koordinat geografis 7,7580 LS – 7,9390 LS dan 110,3460 BT – 110,5320 BT dengan 86 titik penelitian. Data mikrotremor dianalisis menggunakan metode Horizontal to Vertical Spectral Ratio (HVSR) untuk mendapatkan nilai frekuensi predominan dan faktor amplifikasi pada setiap titik penelitian.Hasil analisis mikrotremor digunakan untuk menentukan ketebalan lapisan sedimen dan divalidasi menggunakan data bor di wilayah tersebut yang didapatkan dari Disperindagkop Bidang Pertambangan dan Energi Provinsi D.I. Yogyakarta untuk mendapatkan litologi lapisan sedimen wilayah penelitian. Hasil penelitian ini menunjukkan wilayah yang memiliki nilai ketebalan sedimen relatif tebal yakni 73,75 m sampai dengan 135,37 m berada di sebelah barat jalur Sesar Opak, bagian utara di wilayah Kalasan, Depok, Berbah bagian barat dan utara, Prambanan bagian barat, Piyungan bagian barat daya, Banguntapan dan Kotagede, Pleret bagian barat dan sebagian kecil Pleret bagian timur serta beberapa daerah lain yakni wilayah Kretek dan Pundong. Wilayah lain seperti Jetis, Imogiri, Panggang, Bambanglipuro, sebagian daerah Sewon, Piyungan bagian utara dan Prambanan bagian selatan cenderung memiliki ketebalan sedimen yang lebih tipis antara 3,7 m sampai 69,3 m. Daerah penelitian yang memiliki resiko rawan terhadap gempa bumi berada di Zona I (Bambanglipuro, Pundong dan Kretek) dan Zona IV (Kalasan, Depok, Berbah, Kotagede, Banguntapan, dan sebagian wilayah Prambanan) dengan ketebalan lapisan sedimen yang tebal (73,75 m sampai 135,37 m). Sedangkan daerah yang memiliki resiko rawan gempa bumi relatif lebih kecil berada di Zona II (Imogiri, Jetis dan sebagian daerah Pleret) dan Zona III (Sebagian daerah Prambanan dan Piyungan) dengan ketebalan lapisan sedimen tipis (3,7 m sampai 69,3 m).Kata kunci: Sesar Opak , HVSR, mikrotremorAbstractThe research about analysis of sediment layer lithology in Opak fault lines had been finished. The aim of this study was to identify variation of sediment layers lithology and mapping the earthquake-prone zones based methods HVSR and borehole data in the area of Opak fault lines. The area of this research was in the area of Opak fault lines which located in Bantul until Prambanan at geographical coordinates 7.7580 LS - 110.3460 LS and 7.9390 BT - 110.5320BT using 86 research points. The microtremor signals analyzed using Horizontal to Vertical Spectral Ratio (HVSR) to get the predominan frequency and amplification factors at each point. The result of microtremor analysis was used to determine the value of sediment thickness (H) and was validated using borehole in the area to get sediment layers lithology of the research area. The results of this research indicate that area with thick sediment layer thickness is 73,75 m to 135,37 m was in west side of Opak fault lines, northen part of Kalasan, Depok, western part and northen part of Berbah, western part of Prambanan, southwestern part of Piyungan, Banguntapan and Kotagede, western part of Pleret and small region in eastern part of Pleret and others area like Kretek and Pundong. The other areas like Jetis, Imogiri, Panggang, Bambanglipuro, partially Sewon, northen part of Piyungan and southern part of Prambanan have thinner sediment thickness between 3,7 m to 69,3 m. The area of research which have risk-prone to earthquakes was in Zone I (Bambanglipuro, Pundong and Kretek) and Zone IV (Kalasan, Depok, Berbah, Kotagede, Banguntapan, and part of Prambanan) with thick sediment layer thickness (73, 75 m to 135.37 m). While the risk-prone area which have relatively smaller earthquakes was in Zone II (Imogiri, Djetis and parts Pleret) and Zone III (some part of Prambanan and Piyungan) with thin sediment layer thickness (3.7 m to 69.3 m).Keywords: Opak fault lines, HVSR, microtremor signals
PENENTUAN FORMULA EMPIRIS PERCEPATAN TANAH MAKSIMUM DI DAERAH ISTIMEWA YOGYAKARTA Imdadu Rohman; Denny Darmawan; Nugroho Budi Wibowo
Jurnal Ilmu Fisika dan Terapannya (JIFTA) Vol 9, No 1 (2022): Jurnal Fisika
Publisher : Prodi Fisika, Departemen Pendidikan Fisika

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Abstract

Telah dilakukan penelitian tentang formula empiris percepatan tanah maksimum (PGA) di Daerah Istimewa Yogyakarta. Penelitian ini bertujuan untuk menentukan formula empiris PGA untuk wilayah Yogyakarta dan membuat peta persebaran nilai PGA dari suatu kejadian gempabumi menggunakan formula empiris yang telah diperoleh. Pada penelitian ini, penentuan formula empiris PGA dilakukan dengan memodifikasi formula empiris umum Costa (1998) menggunakan data dari accelerograph stasiun seismik JUII Yogyakarta. Dari rekaman accelerograph tersebut dicari parameter yang sesuai dengan beberapa event gempa pada tahun 2019. Melalui analisis regresi linier maka formula empiris PGA untuk wilayah Yogyakarta dapat diperoleh. Hasil penelitian menunjukan bahwa formula empiris untuk wilayah Yogyakarta adalah: . Dibandingakan dengan beberapa formula empiris yang sudah ada sebelumnya, formula empiris ini relatif lebih baik dan mendekati hasil PGA observasi dengan tingkat korelasi yang kuat sebesar 0,95 dan tingkat error yang kecil sebesar 0,32. Pemetaan nilai PGA berdasarkan formula empiris yang telah diperoleh pada penelitian ini untuk event gempabumi 9 Juli 2019 menghasilkan persebaran nilai PGA pada rentang 0,5 – 2,6 gal dengan pola persebaran nilai PGA yang berbanding lurus dengan jarak ke sumber gempabumi. Kata kunci: PGA, formula empiris, gempabumi
ANALISIS DOSIS PADA PENYEMBUHAN KANKER PAYUDARA DENGAN BORON NEUTRON CAPTURE THERAPY (BNCT) MENGGUNAKAN MCNP X THE DOSAGE ANALYSIS ON BREAST CANCER HEALING WITH BORON NEUTRON CAPTURE THERAPY (BNCT) BY USING MCNP X Norma Ayu Rahmawati; Yohanes Sardjono; Denny Darmawan
Jurnal Ilmu Fisika dan Terapannya (JIFTA) Vol 6, No 2 (2017): Jurnal Fisika
Publisher : Prodi Fisika, Departemen Pendidikan Fisika

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AbstrakTujuan penelitian ini adalah (1) untuk mengetahui pengaruh konsentrasi boron-10 terhadap laju dosis untuk pengobatan kanker payudara dan(2) untuk mengetahui pengaruh konsentrasi boron-10 terhadap lamanya waktu iradiasi pada terapi kanker payudara. Penentuan besar laju dosis dan waktu iradisipada BNCT dilakukan dengan metode simulasi MCNPX. Metode simulasi ini dilakukan dengan membuat pendekatan geometri untuk organ payudara yang didalamnya terdapat kanker dengan diameter kanker 3 cm. Kanker diinjeksi dengan menggunakan Boron-10 dengan variasi 20μg/g – 45μg/g. Kemudian kanker diiradiasi dengan menggunakan sinar alfa dengan energi termal dan epitermal. Hasil keluaran dari MCNPX berupa fluks neutron yang diolah secara matematik untuk laju dosis dan waktu iradiasi yang diinginkan. Hasil penelitian menunjukkan bahwa diketahui laju dosis pada jaringan kanker untuk dosis boron 20 μg/g Kanker adalah 0,0531 Gy/detik dengan waktu iradiasi 941,16 detik atau 15,7 menit, 25 μg/g Kanker adalah 0,0756 Gy/detik dengan waktu iradiasi 661,75 detik atau 11 menit, 30 μg/g Kanker adalah 0,0867 Gy/detik dengan waktu iradiasi 576,82 detik atau 9,6 menit dan 35 μg/g Kanker adalah 0,098 Gy/detik dengan waktu iradiasi 510,44 detik atau 8,5 menit, 40 μg/g Kanker adalah 0,109 Gy/detik dengan waktu iradiasi 458,67 detik atau 7,6 menit dan 45 μg/g Kanker adalah 0,12 Gy/detik dengan waktu iradiasi 415,60 detik atau 6,9  menit.Hasiltersebutdibuatgrafikdenganfiting linear sehinggadapatditarikkesimpulanbahwasemakin besar konsentrasi Boron-10 yang diinjeksikan maka laju dosis semakin tinggi secara linear  dan untuk waktu iradiasi semakin menurun secara linear untuk pengobatan kanker payudara. Kata-kata kunci : BNCT, kanker payudara, MCNPXAbstractThe purpose of this research wasto determine (1) to determine the effect of the concentration of boron-10 dose rate for breast cancer treatment(2) to determine the effect of the concentration of boron-10 on the length of time of irradiation in the treatment of breast cancer.The determination of accepted total radiation dosage rate and theduration of cancer therapy irradiationusedsimulation with MCNPX program. This simulation method is done by creating a geometric approach to the organ in which there are breast cancer with a diameter of 3 cm cancer. Cancer injected using Boron-10 with a variation of 20μg / g - 45μg / g. Then cancer is irradiated with alpha rays with energy using thermal and epithermal. The output of the neutron flux MCNPX be treated mathematically for the dose rate and irradiation time desired. The result of this research indicate that the dosage rate on cancer tissue for boron dosage of 20 μg/g of Kanker is 0.0531 Gy/second with the duration of 941.16 second or 15.7 minutes, 25 μg/g of Kanker is 0,0756 Gy/second with the duration of irradiation is  661,75 second or 11 minutes, 30 μg/g of Kanker is 0,0867 Gy/second with  duration of irradiation is 576,82 second or 9,6 minutes and 35 μg/g of Kanker is 0,098 Gy/second with  duration of irradiation is 510,44 second or 8,5 minutes, 40 μg/g of Kanker is 0,109 Gy/second with  duration of irradiation is 458,67 second or 7,6 minutes and 45 μg/g of Kanker is 0,12 Gy/second with  duration of irradiation 415,60 second or 6,9  minutes.These results was graphed with linear fittings sehinggadapat drawn the conclusion that the greater the concentration of Boron-10 is injected, the higher the dose rate and linear manner for irradiation time decreases linearly for the treatment of breast cancer. Key words : BNCT, breast cancer, MCNPX
Co-Authors Achmad Maulana Achsan Ahmad Awaluddin Noer Aini Rahmatun Ummi Fadlilah Anak Agung Gede Sugianthara Arif Sudrajat Bambang Ruwanto Heningtyas Heningtyas Ika Kurnaiwati Ika Kurniawati Ilham Adi Panuntun Imdadu Rohman Khafidh Nur Aziz Laila Katriani Meita Aulia Sari Meita Aulia Saru Merizka Marsyelina Mifta Arunahul Janah Noor Rika Safitri Norma Ayu Rahmawati Nugroho Budi Wibowo Phisca Maulana Zaky Ichsany R. A. Adipurno R. Yosi Aprian Sari Restu Widiatmono Rifka Addawiyah Rike Nainitania Sardjono Sardjono Ulfa Fadhilah Umi Habibah Wipsar Sunu Brams Dwandaru Yohanes Sardjono Yosaphat Sumardi Yosi Aprian Sari Yuni Setiawati