Garuda - Garba Rujukan Digital

p-Index From 2021 - 2026

2.663

P-Index

This Author published in this journals

All Journal Jurnal Fisika dan Pembelajarannya Jurnal Penelitian Saintek Jurnal Sains Dasar Widyariset JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards) INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Jurnal Geofisika Jurnal Teras Fisika : Teori, Modeling, dan Aplikasi Fisika Widyariset PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Makara Journal of Science Progressive Physics Journal Jurnal Psikologi Poseidon: Jurnal Ilmiah Psikologi dan Psikologi Kemaritiman Jurnal Ilmu Fisika dan Terapannya (JIFTA) Wahana Fisika : Jurnal Fisika dan Terapannya

Denny Darmawan

Jurusan Pendidikan Fisika, FMIPA, Universitas Negeri Yogyakarta

Author-ID : 250021

Aerospace Engineering Humanities Astronomy Automotive Engineering 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 Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Neuroscience Physics Social Sciences Other

Published : 56 Documents Claim Missing Document

Claim Missing Document

Articles

1 2 3 4 5

Model Development of NIÑO 3.4 and Indian Ocean Dipole (IOD) Anomalies Teleconnection Saputra, Antonni; Hermawan, Eddy; Darmawan, Denny
Jurnal Sains Dasar Vol 7, No 2 (2018): October 2018
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jsd.v7i2.38551

The purpose of this research is to develop the teleconnection model of Niño 3.4 and IOD anomalies which can be used as reference to explain precipitation anomalies. El-Niño and IOD cycles are shown as the warming process of sea surface temperatures where for El-Niño is in the Pacific Ocean and IOD is in the Indian Ocean and each of them forms a cycle over a certain period of time. The method used to determine the dominant oscillation of the teleconnection of Niño 3.4 and IOD anomalies is Power Spectral Density (PSD), and to model the teleconnection of Niño 3.4 and IOD anomalies is ARIMA (Autoregressive Integrated Moving Average). The data used are Niño 3.4 index which is one type of index for El-Niño and IOD index. The results are Power Spectral Density (PSD) graphs for the teleconnection of Niño 3.4 and IOD anomalies which oscillates around 5 years. By the ARIMA method, the approximate model for the data of teleconnection of Niño 3.4 and IOD is ARIMA (1,1,2) with equation of Zt = 1.516 Zt-1 - 0.516 Zt-2 - 0.256 at-1 + 0.021 at-2.

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

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.

Kajian Sistem Terfrustasi pada Bahan Antiferromagnet dengan Model Ising 2D R. N. Safitri; A. R. U. Fadilah; Denny Darmawan; R. Y. A. Sari
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)

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.

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 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

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

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

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

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

Analisa Resiko Bahaya Seismik Berdasarkan Parameter Ketebalan Lapisan Sedimen dan Faktor Amplifikasi di Kecamatan Prambanan dan Gantiwarno Nugroho Budi Wibowo; Denny Darmawan; Zahroh Utami; Siti Patimah
Jurnal Sains Dasar Vol 7, No 2 (2018): October 2018
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jsd.v7i2.38553

Kecamatan Prambanan dan Gantiwarno merupakan wilayah yang terdampak gempabumi Yogyakarta 2006. Kedua kecamatan tersebut memiliki resiko bahaya seismik. Resiko bahaya seismik dapat dikaji dengan pendekatan ketebalan lapisan sedimen dan faktor amplifikasi. Kedua parameter tersebut dapat mempengaruhi penguatan gelombang seismik. Tujuan penelitian ini untuk mengetahui faktor amplifikasi, ketebalan lapisan sedimen dan potensi resiko bahaya seismik di Kecamatan Prambanan dan Gantiwarno. Penelitian ini menggunakan 30 data mikrotremor yang dianalisis dengan metode HVSR dan elipticity curve. Hasil penelitian menunjukkan bahwa frekuensi predominan di Kecamatan Prambanan dan Gantiwarno bervariasi dari 0,7 – 9,5 Hz. Faktor amplifikasi di Kecamatan Prambanan dan Gantiwarno bervariasi dari 0,5 – 8,7. Ketebalan lapisan sedimen di Kecamatan Prambanan dan Gantiwarno bervariasi dari 4,24 – 114,45 m. Mikrozonasi resiko bahaya seismik tinggi pada Kecamatan Prambanan berada di Desa Sanggrahan dan Cucukan, sedangkan pada Kecamatan Gantiwarno berada di Desa Sawit dan Ngandong.

Simulasi Aliran Fluida Yang Disertai Pertukaran Panas Menggunakan Metode Finite Volume Particle (FVP) Rida SN Mahmudah; Denny Darmawan; Koji Morita
Jurnal Sains Dasar Vol 6, No 2 (2017): October 2017
Publisher : Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta

Pertukaran panas yang melibatkan perubahan fasa pada fluida mengalir merupakan fenomena penting dalam bidang sains dan rekayasa. Beberapa metode komputasi dinamika fluida telah dikembangkan untuk mensimulasikan fenomena ini, baik yang berbasis kisi maupun tanpa kisi. Penelitian ini bertujuan untuk membuat simulasi aliran fluida yang disertai aliran panas dengan menggunakan metode Finite Volume Particle (FVP). Mula-mula, dibuat kode simulasi pertukaran panas yang disebabkan oleh konduksi pada rongga persegi dan memvalidasi hasilnya dengan solusi analitis konduksi panas 1D. Dari proses validasi ini, diketahui bahwa hasil simulasi dan solusi analitis menunjukkan kesesuaian yang sangat baik. Kode yang sudah divalidasi ini kemudian dikembangkan untuk mensimulasikan pertukaran panas yang disebabkan oleh aliran fluida (konveksi). Hasil dari simulasi konveksi ini dibandingkan secara kualitatif dengan referensi dan menunjukkan hasil yang memuaskan. Dengan demikian, pada penelitian ini telah dihasilkan kode simulasi pertukaran panas karena konduksi dan konveksi dengan metode FVP yang telah tervalidasi dengan baik. FLUID FLOWS SIMULATION WITH HEAT TRANSFER USING FINITE VOLUME PARTICLE (FVP) METHODHeat transfer involving phase change on flowing fluids is an important phenomena in science and engineering. Several methods on computational fluid dynamics has been developed to simulate this phenomena, either with mesh and/or meshless-based methods. This research is aimed to build a simulation code to simulate fluid flows with heat transfer using Finite Volume Particle (FVP) method. First, a simulation code simulating heat transfer due to conduction in a square cavity was built, and the results were validated with analytical solution of 1D heat conduction. This validation results showed a reasonably good agreement between simulation result and analytical solution. This validated code then was improved to simulate heat transfer due to fluid flows (convection). Results from this convection simulation was compared qualitatively with reference and showed good agreement. Therefor, this research has resulted in simulation code of heat transfer due to conduction and convection with FVP method and has been fairly validated.Key words: fluid flow simulation, heat transfer, finite volume particle method

Co-Authors A. R. U. Fadilah Achmad Maulana Achsan Adisti, Adisti Agung Purnomo Ahmad Awaluddin Noer Ahmad Bayhaqi Ahmad Bayhaqi Aini Rahmatun Ummi Fadlilah Alfarisa, Suhufa Anak Agung Gede Sugianthara Arif Sudrajat Ariswan Ariswan Arya, Lutfi Aziz, Khafidh Nur Bambang Ruwanto Bambang Ruwanto, Bambang Bambang Ruwantro Desi Novi Dayana Eddy Hermawan Fitrianingtyas, Rahmawati Gofur Dyah Ayu Gilang Petiwi Heningtyas Heningtyas Heningtyas Heningtyas Ika Kurnaiwati Ika Kurniawati Ika Maulita Ilham Adi Panuntun Imdadu Rohman Kautsar Fadlih Akbar Kautsar Fadlih Akbar Khafidh Nur Aziz Khafidh Nur Aziz Khikmah Muliati Khikmah Muliati Koji Morita Laatifah, Laatifah Laila Katriani Lestari Tri Eva Maharani, Laras Anindita Meita Aulia Sari Meita Aulia Saru Merizka Marsyelina Mifta Arunahul Janah Mithra Mustofa, Nisrina Hasna Noor Rika Safitri Norma Ayu Rahmawati Nugroho Budi Wibowo Nugroho Budi Wibowo Nugroho Budi Wibowo Nugroho Budi Wibowo Nugroho Budi Wibowo Nugroho Budi Wibowo NUGROHO BUDI WIBOWO NUGROHO BUDI WIBOWO Nur Aziz, Khafidh Nur Hikmah NUR INTAN PERMATASARI NUR INTAN PERMATASARI Nurhayati Nurhayati Nurrohman Aryo Seno Petiwi, Gofur Dyah Ayu Gilang Phisca Maulana Zaky Ichsany Prihastiwi Fifi Purnama Aditya R. A. Adipurno R. N. Safitri R. Y. A. Sari Restu Widiatmono Rida Siti NM Rida Siti Nur’aini Mahmudah Rifka Addawiyah Rike Nainitania Risti, Fidel Rizal Aditya Saputra, Antonni Sardjono Sardjono Siti Fatimah Siti Patimah Suparno Suparno Ulfa Fadhilah Umi Habibah Warsono Warsono Wibowo Nugroho Budi Widiyansari, Roma Wipsar Sunu Brams Dwandaru Yohanes Sardjono Yosaphat Sumardi Yosaphat Sumardi Yosi Aprian Sari Yuni Setiawati Zahroh Utami Zainfa, Aqheela Aphrodita

Title

Found 56 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 56 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 56 Documents
Search