Denny Darmawan
Universitas Negeri Yogyakarta

Published : 12 Documents
Articles

Found 12 Documents
Search

Kajian Sistem Terfrustasi pada Bahan Antiferromagnet dengan Model Ising 2D Safitri, R. N.; Fadilah, A. R. U.; Darmawan, Denny; Sari, R. Y. A.
Jurnal Fisika dan Pembelajarannya Vol 1
Publisher : Jurnal Fisika dan Pembelajarannya

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 | 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 : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2254.022 KB)

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)

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 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)

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)

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.
PELATIHAN PRAKTIKUM IPA SD BAGI GURU-GURU SD YANG BUKAN MEMILIKI LATAR BELAKANG IPA DI KABUPATEN BANTUL Sari, R. Yosi Aprian; Darmawan, Denny; Warsono, Warsono; Ariswan, Ariswan
Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Vol 1, No 1 (2017)
Publisher : Yogyakarta State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpmmp.v1i1.12975

Abstract

Permasalahan pendidikan di Indonesia khususnya di Kabupaten Bantul salah satunya adalah kurang meratanya penyebaran guru-guru khususnya pada keahlian tertentu, misalkan guru IPA. Di satu sisi, ada tuntutan keprofesional guru-guru artinya guru adalah faktor penentu keberhasilan proses pembelajaran yang berkualitas, sehingga berhasil tidaknya pendidikan mencapai tujuan selalu dihubungkan dengan kiprah para guru. Oleh karena itu, usaha-usaha yang dilakukan dalam meningkatkan mutu pendidikan hendaknya dimulai dari peningkatan kualitas guru. Guru yang berkualitas diantaranya adalah mengetahui dan mengerti peran dan fungsinya dalam proses pembelajaran. Tapi disisi lain, guru dituntut untuk mengerti dan memahami sesuatu yang bukan latar belakangnya. Ironis memang ...Salah satu solusi terkait dengan permasalahan di atas, walaupun bukan solusi yang terbaik adalah memberikan pelatihan berupa praktikum IPA bagi guru-guru SD yang tidak memiliki latar belakang IPA. Bentuk praktikum ini menyesuaikan dengan jenis percobaan yang ada di SD, yaitu sederhana dan bisa dilakukan oleh siswa sendiri. Selain  Ada 8 jenis percobaan yang dilakukan, 6 diantaranya bersesuaian dengan materi IPA SD dan sisanya cenderung bersifat edutainment berbasis pemanfaatan limbah.Evaluasi yang dilakukan selama kegiatan PPM ini terdiri dari 2 bentuk, yaitu evaluasi kinerja yang dilakukan oleh tim PPM dan evaluasi berupa kuisioner yang diisi oleh peserta guru-guru. Dari evaluasi kinerja, peserta yang guru-guru SD sangat antusias mengikuti kegiatan pelatihan ini dengan rata-rata nilai aktivitas 83,3 masuk dalam kategori baik. Sedangkan dari kuisioner yang diberikan oleh guru-guru, pelatihan sejenis sangat diperlukan untuk menambah pengalaman dan pengetahuan khususnya praktikum IPAKata kunci: pelatihan praktikum IPA, proses pembelajaran IPA
Workshop Praktikum Sederhana Bagi Guru-Guru SD Kelas 4 Dan 5 Berbasis Pemanfaatan Limbah Di Kabupaten Sari, R. Yosi Aprian; Darmawan, Denny; Mahmudah, Rida Siti Nuraini
Jurnal Pengabdian Masyarakat MIPA dan Pendidikan MIPA Vol 2, No 2 (2018): Vol 2, No 2 (2018)
Publisher : Yogyakarta State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jpmmp.v2i2.21921

Abstract

Pembelajaran IPA tidak harus dilakukan di dalam kelas, ataupun dengan menggunakan peralatan laboratorium yang bagus dan canggih apalagi terkomputerisasi. Pembelajaran IPA bisa dilakukan di luar kelas dan dapat dilakukan berbagai bentuk kegiatan, antara lain kegiatan praktikum. Tujuan utama dari kegiatan ini adalah menyegarkan kembali jenis-jenis praktikum yang bisa dilakukan sekaligus untuk memperkuat pemahaman konsepnya. Sedangkan tujuan lainnya adalah agar guru-guru bisa berinovasi dan berimprovisasi merancang kegiatan pembelajaran anak-anak khususnya kelas 4 dan 5 terutama yang berkaitan dengan praktikum IPA.Kegiatan ini dilakukan berupa percobaan yang dilakukan secara berkelompok dan diawali dengan memberikan modul yang berisikan panduan pelaksanaan praktikum dan diakhiri penjelasan dan pemaknaan fisisnya. Kegiatan ini dilakukan di dalam kelas dan di luar kelas. Adapun jenis praktikum yang dilakukan adalah Mekanika (GLB dan GLBB), Kalor (Perubahan Wujud Benda), Gelombang, Optika (lensa dan cermin), Listrik dan Magnet, Bumi dan Alam Semesta, dan Balon Gas. Evaluasi yang dilakukan selama kegiatan ini terdiri dari 2 bentuk, yaitu evaluasi kinerja yang dilakukan oleh tim dan evaluasi berupa kuisioner yang diisi oleh peserta guru-guru. Dari evaluasi kinerja, peserta yang guru-guru SD sangat antusias mengikuti kegiatan pelatihan ini dengan rata-rata nilai aktivitas 83,30 masuk dalam kategori baik dan nilai evaluasi guru selama kegiatan berlangsung 91,46 masuk dalam katagori sangat baik. Sedangkan dari kuisioner yang diberikan oleh guru-guru, pelatihan sejenis sangat diperlukan untuk menambah pengalaman dan pengetahuan khususnya praktikum IPA khususnya dalam merancang alat praktikum sederhana yang berasal dari lingkungan sekitar. Kata kunci: praktikum IPA, proses pembelajaran IPA. Simple Experiment Workshop for Elementary School Teachers of Class 4 And 5 Based on Waste Utilization in Bantul Distric  Abstract           Science learning does not have to be done in the classroom, or by using good and sophisticated laboratory equipment let alone computerized. Science learning can be done outside the classroom and can be done various forms of activities, such as experiment activities. The main purpose of this activity is to re-type the kinds of experiment that can be done as well as to strengthen the understanding of the concept. While the other goal is for teachers to innovate and improvise the activities that are being built with the science lab.This activity is carried out with experiments conducted in groups and begins by providing a module that contains guidelines for the implementation of the practicum and the end of explanation and the physical meaning. This activity is done in the classroom and outside the classroom. The types of experiment performed are Mechanics (GLB and GLBB), Calor (Change of Being), Waves, Optics (lens and mirror), Electricity and Magnetism, Earth and Universe, and Gas Balloon.Evaluation done during the workshop consisted of 2 forms, they were performance evaluation done by the team and questionnaire for the participant. From performance evaluation, the participant got average activity score of  83,30 which is categorized as good and the evaluation of teachers during the course of 91.46 is included in the category very well. From questionnaire, the workshop is needed to add experience and knowledge in science.Keywords:  Keywords: science experiment, science instruction