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All Journal International Journal of Electrical and Computer Engineering Indonesian Journal of Geography Jurnal Ilmu Dasar POSITRON Jurnal Sains Materi Indonesia Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) JOURNAL AGRIBUSINESS Jurnal VOK@SINDO Journal of Mathematical and Fundamental Sciences Journal of Engineering and Technological Sciences JFA (Jurnal Fisika dan Aplikasinya) Jurnal Spektra JOURNAL ONLINE OF PHYSICS Science and Technology Indonesia JOIV : International Journal on Informatics Visualization Journal of Science and Applicative Technology Neutrino Jurnal Otomasi Kontrol dan Instrumentasi Jurnal Ilmu Fisika JURNAL METEOROLOGI DAN GEOFISIKA Jurnal Review Pendidikan dan Pengajaran (JRPP) Risalah Fisika Jurnal Mekanova : Mekanikal, Inovasi dan Teknologi Sainstek : Jurnal Sains dan Teknologi Community Development Journal: Jurnal Pengabdian Masyarakat Pillar of Physics: Jurnal Berkala Ilmiah Fisika PROSIDING SEMINAR NASIONAL FISIKA (E-JOURNAL) Indonesian Journal of Physics (IJP) Newton-Maxwell Journal of Physics
Mitra Djamal
Institut Teknologi Bandung
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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SENSOR MAGNETIK FLUXGATE DAN APLIKASINYA UNTUK MENGUKUR KUAT ARUS Mitra Djamal
Jurnal Sains dan Teknologi Nuklir Indonesia (Indonesian Journal of Nuclear Science and Technology) Vol 8, No 1 (2007): Februari 2007
Publisher : BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jstni.2007.8.1.2142

Abstract

SENSOR MAGNETIK FLUXGATE DAN APLIKASINYA UNTUK MENGUKUR KUAT ARUS. Secara konvensionaJ kuat arus dapat diukur dengan menghubungkan alat secara seri pada rangkaian. Cara ini memiliki kelemahan karena mengganggu aliran arus yang akan diukur. Dengan menggunakan sensor magnetik, arus dapat diukur tanpa harus mengganggu aliran arus, karena yang diukur hanya kuat medan magnet yang dihasilkan oteh arus yang akan diukur. Dalam tulisan ini akan ditunjukkan penggunaan sensor magnetik fiuxgate untuk mengukur kuat arus. Dari hasil penelitian terlihat bahwa sensor magnetik fiuxgate yang digunakan dapat mengukur kuat arus dalam daerah pengukuran yang cukup lebar dan dengan ketelitian < 2 %.
Design of Purwarupa Actuator on Car-Based Mobile Robot for the Implementation of Application Solution of Path Planning by Using Map Information Fatahah Dwi Ridhani; Mitra Djamal
Jurnal VOK@SINDO Vol 2, No 1 (2014)
Publisher : Program Pendidikan Vokasi Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (140.192 KB)

Abstract

Path planning and controlling system for car-based mobile robot was applied on a car-based mobile robot with 1/18 scale. This system controlled the car-based mobile robot to reach the target position. The path planning used static Reed-Shepp curvature. The car-based mobile robot was built by modifying R/C model car in order to be controlled by PC (Personal Computer). The additional parts were sensor system to measure the steering angle and the one to measure the steering of traction motor. This robot has been also added with simple control system so the data interchange between mobile robot and computer could be minimized. Lastly, the unit was calibrated to determine characteristics of the car-based mobile robot.
Simulation of Void Detection System using Gamma-Ray Compton Scattering Technique Mona Berlian Sari; Rahadi Wirawan; Abdul Waris; Hong Joo Kim; Mitra Djamal
Journal of Engineering and Technological Sciences Vol. 51 No. 3 (2019)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2019.51.3.5

Abstract

A simple void detection system for concrete was successfully developed using high-penetration gamma rays with Compton scattering. This research attempted to identify a void in the subsurface of a concrete volume that could not be accessed from any of the sides. Monte Carlo simulation using GEANT4 toolkit was performed to investigate the gamma-ray backscattering events. An NaI(Tl) detector was used with 60Co and 137Cs as gamma-ray sources. The void's location was successfully detected during material target scanning. Density discrepancies conduce variance of the backscattering peak produced due to the presence of a void. Compared to 60Co as the gamma-ray source, 137Cs is a better choice for application in NDT systems using Compton scattering.
Investigation of Dy3+ Ion Doped Borate Glasses and Their Potential for WLED and Laser Application Juniastel Rajagukguk; Lia Yuliantini; Fitrilawati Fitrilawati; Mitra Djamal; Jakrapong Kaewkhao
Journal of Engineering and Technological Sciences Vol. 52 No. 6 (2020)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2020.52.6.9

Abstract

In this research, Dy3+ ion-doped Na2O-PbO-ZnO-Li2O-B2O3 glasses were developed using the melt and quenching method. The addition of Dy3+ ions in the glass improved the optical properties. The XRD graph verified the amorphous of the glass sample. FTIR showed the vibration of BO3 and BO4 in the structure of the glass. The enhancement of NBOs in the structure of the glass affected the reduction of the bandgap energy of the glass. The hypersensitive transition of the present glass was found at 1270 nm (infrared region) due to electron movement from the 6H15/2 level to the 6H9/2+6F11/2 level. The strong white emission of the glasses came from 575 nm (yellow region) and 483 nm (blue region) when excited by 349 nm. The CIE 1931 chromaticity was located at (0.37;0.40) and verified the white emission of the glasses. Meanwhile, the trendline of the JO parameter was W2 > W6 > W4,indicating the high ionic character of the glass structure. The value of the calculated branching ratio and emission cross-section of Dy_1.0 glass was 0.64 and 0.90 x 10-20 cm2, respectively. From the analysis of results, the present glass has high potential for WLED and laser application.
Topography changes and thermal distribution at the Kelud crater after the 2014 Plinian eruption Wahyudi Wahyudi; Ari Setiawan; Heriansyah Putra; Herlan Darmawan; Imam Suyanto; Irwan Meilano; Irzaman irzaman; Maria Evita; Mitra Djamal; Moh Yasin; Nina Siti Aminah; Perdinan Perdinan; Retna Apsari; Wahyu Srigutomo; Wiwit Suryanto
Indonesian Journal of Geography Vol 52, No 3 (2020): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.51986

Abstract

Topography of a volcano crater can change due to endogenic processes such as deformation or eruption, or surface processes. Erosion and deposition are surface processes that may occur and gradually change the slope of the inner volcano crater. Here, we investigated erosion and deposition processes that occurred in the Kelud crater after the 2014 plinian eruption. We used high-resolution Digital Elevation Models (DEMs) and orthomosaic images derived by drone photogrammetry that acquired between September 2018 and July 2019. We obtained hundreds of aerial images which were reconstructed to obtain 3D models of Kelud’s crater by using Structure from Motion (SfM) technique. Results show erosions at alluvial fans that dominantly located at the east valleys of Kelud crater. The erosion removed the volcanic materials up to -5 m which transported and deposited close to the vicinity of the Kelud crater. The deposition process causes the increase of the Kelud crater lake up to 3 m. Moreover, we also mapped the thermal distribution of the Kelud crater lake by using low cost thermal camera. Our thermal investigation is able to identify some hotspots at the vicinity of the Kelud crater lake with range temperature of 43.7°C – 55.3°C, while the average apparent temperature of the Kelud crater lake is ~ 29°C. This high temperature area may indicate underwater active fractures that continuously release volcanic gasses which leads to convection heat transfer through Kelud’s water lake.
THE IMPLEMENTATION OF DISAGGREGATION ALGORITHM IN THE ANALYSIS OF ENERGY CONSUMPTION BASED ON THE INTERNET-OF- THINGS TECHNOLOGY Husein H; Aditya Alviori; Maman Budiman; Mitra Djamal
AGRIBUSINESS JOURNAL Vol 13, No 1 (2019): AGRIBUSINESS JOURNAL
Publisher : Departement of Agribusiness Faculty of Science and Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (537.936 KB) | DOI: 10.15408/aj.v13i1.11869

Abstract

The effort to reduce the mass energy usage without involvement of consumers is not effective. Thereby, creating a pathway for anyone of consumer to be much more involved in the energy-saving effort. The implementation of disaggregation algorithm in the analysis of energy consumption is to recognize when and which appliance has the largest energy consumption and being able to control the state of all appliances from anywhere. In this research, the principle of disaggregation is event-based and low-sampling data frequency. A KWH-meter is used to send power data to the cloud server via MQTT protocol. The cloud server gathers the energy-consumption data, analyses them and then disaggregates them. The output of the disaggregation algorithm would tell the state (on/off), the average power and the percentage of energy consumed by each appliances. The output will then be sent from the cloud server to Android Apps via MQTT protocol. Then the consumer can easily access and control the energy consumption from their smartphone after knowing it through the disaggregation algorithm.
Designing and Development of 30 KV DC Rectifier Amplifier for Polling Optimization on PVDF Thin Film Ambran Hartono; Mitra Djamal; Suparno Satira; Herman Bahar; Ramli Ramli; Dadang Dadang
Jurnal ILMU DASAR Vol 15 No 1 (2014)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (734.167 KB) | DOI: 10.19184/jid.v15i1.624

Abstract

DC high voltage amplifier is one of the important components to support of PVDF thin films polling equipment. Hardware polling is a very important tool in the characterization of PVDF thin films to increase piezoelectric properties. The existence of the problem will be difficult to obtain a high voltage DC sources of lead in the market encouraged us to design and create high-voltage DC source. In research that has been done I've been able to design and create high-voltage amplifier 30 KV DC as a producer of high electric field. To validate the performance of this high voltage DC amplifier has created further testing and measuring the output voltage. Testing is performed to determine the precision, accuracy and stability of the output voltage of the amplifier for more than 60 minutes. From the test results and output measurements performed show that the relative error of 4.5%. Tool output stability is good enough for a span of 30 minutes. This indicates that the design and manufacture of high DC voltage gain have been successful.   Keywords: DC Amplifier, Electric field, High voltage, Polling, PVDF Film
Pengukuran Medan Magnet Lemah Menggunakan Sensor Magnetik Fluxgate dengan Satu Koil Pick-Up Mitra Djamal; Rahmondia Nanda Setiadi
Journal of Mathematical and Fundamental Sciences Vol. 38 No. 2 (2006)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.sci.2006.38.2.2

Abstract

A magnetic sensor has been developed for measuring a very low magnetic field. The sensor consists of two primary coils (excitation coil) and one secondary coil (pick-up coil). Primary coil that wound at ferromagnetic core is made symmetry each other. Whereas secondary coil is wound to both of cores. Primary coil drives the core until it saturated. The generated magnetic field from excitation have the contrary direction, so if there is no external magnetic field, the magnetic field inside the secondary coil is symmetry, but if there is an external magnetic field, there will be magnetic field changes inside secondary coil. These changes will induce secondary coil, as a consequence, there will be an induction voltage that acts as signal at the ends of secondary coil. The signal is then differentiated, amplified, inserted to controlled rectifier, integrated, and amplified for the last time. From measurement results, it can be obtained that magnetic sensor can measure magnetic field in the range of measurement from -40 μT to 40 μT, with sensitivity about 346.47 mV/μT and relative error less than 4%.
The Reliability of Wireless Sensor Network on Pipeline Monitoring System Hafizh Prihtiadi; Mitra Djamal
Journal of Mathematical and Fundamental Sciences Vol. 49 No. 1 (2017)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2017.49.1.5

Abstract

The wireless sensor network (WSN) is an attractive technology, which combines embedded systems and communication networks making them more efficient and effective. Currently, WSNs have been developed for various monitoring applications. In this research, a wireless mesh network for a pipeline monitoring system was designed and developed. Sensor nodes were placed at each branch in the pipe system. Some router fails were simulated and the response of each node in the network was evaluated. Three different scenarios were examined to test the data transmission performance. The results proved that the wireless mesh network was reliable and robust. The system is able to perform link reconfiguration, automatic routing and safe data transmission from the beginning node to the end node.
Multi-wavelength Fibril Dynamics and Oscillations above Sunspot-II Wave Propagation Signature Emanuel Sungging Mumpuni; Dhani Herdiwijaya; Mitra Djamal; Thomas Djamaluddin
Journal of Mathematical and Fundamental Sciences Vol. 50 No. 3 (2018)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2018.50.3.4

Abstract

In this work, the dynamics of one particular fibril were investigated through high-resolution multi-wavelength images with high cadence obtained from the Dutch Open Telescope. Based on exceptional observation data of Active Region 10789, 13th July 2005, we investigated the alternating fibril pattern using tomography of the multi-wavelength band, consisting of the hydrogen alpha line center and also the blue wing, the calcium II H line, and the G-band. Phase difference and coherence analyses were conducted for several points along the fibril and (k, ω) analysis was conducted to understand the wave interaction and its mechanism in the propagation process. Our findings suggest short- to long-period transitions along the fibril with coherence in 10-min oscillations in the penumbra.
Co-Authors Abdul Muid Abdul Muid Abdul Waris Achmad, Fariz Aditya Alviori Ahmad Aminudin Alamta Singarimbun Ambran Hartono Aminah, Nina Siti Ari Setiawan Ashadi Amir Azizah Ghina Arifah Bergita Gela M. Saka Buchari Buchari Costrada, Aldo Novaznursyah Cut Novianti Rachmi, Cut Novianti Dadang Dadang Danang Trihatmoko, Danang Daniel Kurnia Daryono Hadi Tjahyono Dasapta Erwin Irawan, Dasapta Erwin Deddy Kurniadi Deny Juanda Puradimaja Dhani Herdiwijaya Dhani Herdiwijaya Emanuel Sungging Mumpuni Evita, Maria Fatahah Dwi Ridhani Fitrilawati Fitrilawati Freddy Haryanto H Mahfudz Hafizh Prihtiadi Harapan Marpaung Harmadi Harmadi Hendro Hendro Hendro Hendro Hendro Hendro Herlan Darmawan Herman Bahar Hong Joo Kim Hufri Hufri Husein H I Kadek Agus Sara Sawita I Made Astra Iful Amri Imam Suyanto Imam Taufiq Inggi Dwi Putri Irninthya Nanda Pratami Irwan irwan meilano Irzaman, Irzaman Ismail Rizka Pambudi Ivan Limansyah Jakrapong Kaewkhao Jayawarsa, A.A. Ketut Juneman Abraham Juniastel Rajagukguk Juniastel. R Kane, Hansel Khairurrijal Khairurrijal Kim, Hong Joo Kumalasari, Ratih Lia Yuliantini Lia Yuliantini Linus Pasasa M. Barmawi Maman Budiman Maman Budiman Maria Evita Maria Evita Maria Evita Martin Liess Martin Liess Melany Febrina Moch Tanzil Multazam Moh Yasin Mukhlizar, Mukhlizar Mukti, Rino Rakhmata Mulyaningsih, Indrya Murhaban Ni Ketut Lasmia Nina Aminah Nina Siti Aminah Nur Ismirawati, Nur Putra, Heriansyah R. N. Setiadi Rahmat Hidayat Rahmat Hidayat Rahmondia N. S Rahmondia N. Setiadi Rahmondia Nanda Ramli Ramli Ramli Ramli Rausyanfikr, Fadhil Retna Apsari Riko Rakhmat Sanjaya, Yogie Sari, Mona Berlian Sari, Mona Berlian Satria, Eko Sawita, I Kadek Agus Sara Siti Aminah, Nina Sony Wardoyo Sparisoma Viridi Suparno Satira Suprijadi Suprijadi Suprijadi Suprijadi Suryanto, Wiwit Suyatno Suyatno Suyatno, Suyatno Thomas Djamaluddin Togar Saragi Tri Siswandi Syahputra Umiatin, Umiatin Wahyu Srigutomo Wahyudi Wahyudi Widyaningrum Indrasari Wilson Jefriyanto Wirawan Wirawan Wirawan, Rahadi Yudi Nugraha Yuliantini, Lia Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yulkifli Yusaku Fujii Zaki Suud Zannuraini Zannuraini Zul Anwar