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THE SEISMIC CHARACTERISTICS OF NORTHERN PART OF KULONPROGO Ruwantro, Bambang; Sumardi, Yosaphat; Darmawan, Denny
Jurnal Penelitian Saintek Vol 21, No 1: April 2016
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2818.332 KB) | DOI: 10.21831/jps.v21i1.10548

Abstract

Microtremor signal measurements had been conducted in the northern part of Kulonprogro to obtain the seismic characteristics in the form of: the predominant frequency value, amplifi cation factor, sediment thickness, seismic vulnerability index, the maximum ground vibration acceleration, and the ground shear strain value. The measurement was conducted at 18 points within geographical coordinates of 110.10° E-110.27° E and 7.64° S-7.80° S. The signals were analyzed using Horizontal to Vertical Spectral Ratio (HVSR) method. The results show that the predominant frequency value is in the range of 2.98-13.53 Hz; amplifi cation factor is in the range of 1.6-10.1; sediment thickness is in the range of 5-60 m; seismic vulnerability index is in the range of 0.6 × 10 -6-5.8 × 10 -6 s /cm; maximum ground acceleration is in the range of 24-54 gal and ground shear strain value is in the range of 0.6 × 10 -4  – 4.4 × 10 -4.
Kajian Sistem Terfrustasi pada Bahan Antiferromagnet dengan Model Ising 2D Safitri, R. N.; Fadilah, A. R. U.; Darmawan, Denny; Sari, R. Y. A.
Jurnal Sains Fisika dan Terapannya Vol 1
Publisher : Jurnal Sains Fisika dan Terapannya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1311.176 KB)

Abstract

Penelitian ini bertujuan untuk mensimulasikan energi dasar dan magnetisasi bahan antiferromagnet dengan pengaruh suhu dan nilai kompetisi interaksi. Kompetisi interaksi terjadi antara tetangga terdekat dengan tetangga terdekat berikutnya. Penyelesaian kasus antiferromagnet berikut menggunakan model Ising dua dimensi dengan metode Monte Carlo. Hasil penelitian menunjukkan bahawa energi dasar mengalami peningkatan secara signifikan pada suhu kritis (suhu Neel). Semakin besar kompetisi interaksi, energi dasar pada suhu awal mengalami penurunan. Berdasarkan nilai magnetisasi, bahan antiferromagnet yang terfrustasi mengalami perubahan fase menjadi paramagnet ketika suhunya dinaikkan. Dengan memperbesar kompetisi interaksi, perubahan fase terjadi pada suhu Neel yang lebih tinggi.
Interpretasi Struktur Bawah Permukaan Jalur Sesar Opak Berdasarkan Model Suseptibilitas dan Second Vertical Derivative dengan Metode Geomagnet Dayana, Desi Novi; Wibowo, Nugroho Budi; Darmawan, Denny
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 8, No 02 (2018) : IJAP Volume 8 ISSUE 02 YEAR 2018
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (829.047 KB) | DOI: 10.13057/ijap.v8i2.21428

Abstract

Tujuan dari penelitian ini adalah untuk mengetahui struktur bawah permukaan jalur Sesar Opak berdasarkan model suseptibilitas dan SVD dengan metode geomagnet. Pengambilan data dilakukan menggunakan Proton Precession Magnetometer Geometric tipe G-856 dengan 77 titik pengukuran dan jarak antar titik pengukuran +2 km. Pengolahan data dilakukan melalui koreksi variasi harian, koreksi IGRF, SVD, dan reduksi ke kutub. Pemodelan dilakukan dengan menganalisis anomali medan magnet yang telah direduksi ke kutub. Hasil pemodelan solid model menunjukkan bahwa Formasi Semilir dengan nilai suseptibilitas (0 – 100) ×10-3, Formasi Merapi Muda dengan nilai suseptibilitas (0 – 2) ×10-3, dan Formasi Nglanggran dengan nilai suseptibilitas (0,6 – 70) ×10-3. Hasil pemodelan SVD dan solid model menunjukkan keberadaan Sesar Opak.
Microtremor characteristics and analysis of seismicity on Opak fault lines, Bantul district, Yogyakarta Marsyelina, Merizka; Wibowo, Nugroho Budi; Darmawan, Denny
Jurnal Sains Dasar Vol 3, No 1 (2014): Jurnal Sain Dasar
Publisher : Yogyakarta State University

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
Temperature control system for infant incubator using DS18B20 sensor Katriani, Laila; Setiawan, Arif; Darmawan, Denny
Jurnal Sains Dasar Vol 3, No 2 (2014): Jurnal Sains Dasar
Publisher : Yogyakarta State University

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
Pemodelan 2D dan 3D Metode Geomagnet untuk Interpretasi Litologi dan Analisis Patahan di Jalur Sesar Oyo Heningtyas, Heningtyas; Wibowo, Nugroho Budi; Darmawan, Denny
Jurnal Lingkungan dan Bencana Geologi Vol 10, No 3 (2019)
Publisher : Badan Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3570.083 KB) | DOI: 10.34126/jlbg.v10i3.157

Abstract

Gempa susulan setelah gempabumi Yogyakarta Tahun 2006 memiliki hiposenter bukan di sepanjang Sesar Opak tapi cenderung di sekitar unidentified fault yang berjarak 10 – 15 km sebelah timur pegunungan Gunung Kidul. Unidentified fault tersebut berkorelasi dengan keberadaan jalur Sesar Oyo. Metode geofisika yang dapat diterapkan untuk mengidentifikasi keberadaan jalur sesar adalah metode geomagnet. Penelitian ini bertujuan untuk mengetahui pola sebaran anomali medan magnet di sekitar jalur Sesar Oyo, mengetahui susunan formasi dan jalur Sesar Oyo berdasarkan pemodelan geomagnet. Pengambilan data dilakukan menggunakan PPM dengan 35 titik pengamatan dan spasi antar titik pengamatan 1,5 km. Pengolahan data dilakukan dengan koreksi variasi harian, koreksi IGRF(International Geomagnetics Reference Field), RTP (Reduction to Pole) dan Upward Continuation. Pemodelan dilakukan dengan menganalisis anomali medan magnet yang telah direduksi ke kutub dan kontinuasi ke atas dengan ketinggian 2500 m. Hasil analisa menunjukkan rentang nilai anomali medan magnet di kawasan penelitian adalah 180 nT – 660 nT, yang menunjukkan kontras keberadaan blok sesar. Hasil pemodelan 2D menunjukkan kawasan penelitian didominasi oleh 3 formasi batuan utama yaitu batubasalt-andesitik Formasi Nglanggran, batupasir Formasi Sambipitu, dan batugamping Formasi Wonosari. Hasil pemodelan 3D menunjukkan Sesar Oyo merupakan sesar geser dengan kedalaman 150 – 300 m, jalur sesar tersebut terbagi menjadi 2 segmen yaitu dengan arah N120°E sepanjang 5,8 km dan N160°E dengan panjang 2,5 km.
DEVELOPMENT OF UV-BOX CONTROL SYTEM PROTOTYPE FOR STERILIZATION MEDIA USING PHOTODIODE SENSOR Katriani, Laila; Darmawan, Denny; Noer, Ahmad Awaluddin
Jurnal Sains Dasar Vol 4, No 1 (2015): Jurnal Sains Dasar
Publisher : Yogyakarta State University

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
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 Adipurno, R. A.; Dwandaru, Wipsar Sunu Brams; Darmawan, Denny; Ruwanto, Bambang
Jurnal Sains Dasar Vol 4, No 1 (2015): Jurnal Sains Dasar
Publisher : Yogyakarta State University

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
Interpretasi Struktur Bawah Tanah pada Sistem Sungai Bribin dengan Metode Geo Aziz, Khafidh Nur; Sumardi, Yosaphat; Darmawan, Denny; Wibowo, Nugroho Budi
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.v6i01.1796

Abstract

This research was aimed to determine the distribution pattern of magnetic field anomaly and to identify the lithology of underground structure in Bribin Karst using geomagnetic method. Research location was Semanu Sub-district, Gunungkidul Regency at UTM coordinate of 464061 mT-464929 mT and 9111097 mU-9111970 mU. The data were taken using G-5 Proton Precession Magnetometer (PPM) by looping method. The result showed that the distribution pattern of the magnetic field anomaly in Karst Bribin has value of 330 nT - 530 nT and anomaly values reflecting the system of Bribin River has value of 400 nT-460 nT. The lithology of underground structure in Karst Bribin has susceptibility value of -0.069 (in SI) - 0.0661 (in SI) with depth 200 m associated with limestone, tuff, gypsum, rock salt, and minerals calcite and anhydrite and the lithology associated with the system of Bribin River has susceptibility value -0.069 (in SI) associated with gypsum, rock salt, and minerals anhydrite.
Electromagnetics Properties of Non-Relativistic Deuteron in Ground State Sari, R. Yosi Aprian; Darmawan, Denny
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 𝑆13 dan 𝐷13, which are each associated with a state 𝐿=0, 𝑆=1 and 𝐿=2, 𝑆=1. In the proton-neutron interaction, there are particle exchanges of medium range (1 fm≤𝑟≤2 fm) i.e. scalar meson exchange and the long range (𝑟>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, 〈𝜇D〉=0.856521𝜇𝑁 and electrical quadrupole moment, 〈𝑄D〉=0.00291396 b.