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INDONESIA
INDONESIAN JOURNAL OF APPLIED PHYSICS
Published by Universitas Sebelas Maret
ISSN : 20890133     EISSN : 24776416     DOI : -
Core Subject : Science,
Astronomy Energy Materials Science & Nanotechnology Physics
Indonesia Journal of Apllied Physics provides rapid publication of short reports and important research in all fields of physics. Indonesia Journal of Apllied Physics publishes articles that are of significance in their respective fields whilst also contributing to the disclipline of physics as a whole. Articles should be submitted to the Editorial Office of Indonesia Journal of Apllied Physics through this site. Further information on submission is also available at this site
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Articles 267 Documents
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Simulasi Rekonstruksi Citra Pada Sensor Brain ECVT (Electrical Capacitance Volume Tomography) dengan Metode ILBP (Iterative Linear Back Projection) Nita Handayani; Kharisma Fajar H; Freddy Haryanto; Siti Nurul K; Marlin R Baidillah; Warsito P Taruno
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 6, No 02 (2016): IJAP Volume 06 Issue 02 Year 2016
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v6i02.1480

Abstract

The purpose of this study is to simulate the sensor 32-channel Brain ECVT image reconstruction using ILBP (Iterative Linear Back Projection) methods. ECVT is a dynamic volume imaging technique that utilizes non-linear difference of electric field distribution to determine the distribution of permittivity in the sensing area. ECVT has measured the capacitance of data as a result of changes in the permittivity distribution between the electrode pairs. ECVT device consists of three main parts: helmet-shaped sensors, DAS (Data Acquisition System), PC for display and image reconstruction process. Simulation of sensor design using COMSOL Multiphysics 3.5 software, while the process of image reconstruction and analysis of the results using Matlab software 2009a. The principle of ECVT includes two stages of data collection capacitance of electrodes (forward problem) and image reconstruction from the measured capacitance (inverse problem). In the study, the simulation of image reconstruction was done by varying the object position, the number of objects and charge density of the object. From the simulation results showed that the reconstructed image with ILBP method is influenced by several parameters: the object's position in the sensor,charge density value of the object, an alpha value and the number of iterations was selected.
Exploration of Iron Sand at The Eastern Coast Area of Binangun in Cilacap Regency Using Magnetic Survey Sehah Allasimy; Sukmaji Anom Raharjo; Iska Andriyanto
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): IJAP Volume 07 ISSUE 02 YEAR 2017
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v7i2.13700

Abstract

Exploration of the spread of iron sand on the eastern coastal of Binangun District in Cilacap Regency has been conducted using the magnetic surveys. The magnetic data acquisition was conducted in April 2017. The total magnetic field data obtained is processed, so that can be obtained the local magnetic anomaly data. The modeling of the local magnetic anomaly data is performed on the trajectory of AB that extending from the position point of 109,274698° E and 7.686620° S to 109.2296195° E and 7.689099° S so that obtained various model of the subsurface anomalous objects. Interpretation on the subsurface anomalous objects is done to estimate the types of rocks and their formations based on the magnetic susceptibility value of each object which supported by the geological information of the research area. Based on the interpretation results to be obtained two layers of subsurface rocks that can be estimated as the iron sand that coexists with silt dan clay derived from the alluvium formation. The first rock has a length of 1238.2 meters, a depth of 1.709 – 20.513 meters, and a magnetic susceptibility value of 0.0183 cgs unit. The second rock has a length of 643.055 meters, a depth of 16.524 – 34.188 meters, and a magnetic susceptibility value of 0.0174 cgs unit. The results of this research are also supported by the results of geoelectric data interpretation, where the iron sand that coexists with silt and clay is found at a depth of 9.42 – 19.48 meters with a resistivity value of 52.99 Ωm at Geo-1 point; and a depth of 10.56 – 22.20 meters with resistivity value of 49,03 Ωm at Geo-2 point. Based on the results of of this research, the eastern coastal area of Binangun District is estimated to contain potentially iron ore and economically is a prospect for exploitation.
Front Matter Vol 07 No 02 2017 Mohtar Yunianto
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 2 (2017): IJAP Volume 07 ISSUE 02 YEAR 2017
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v7i2.19972

Abstract

The Application of Thermochromic Liquid Crystal in Temperature Distribution Measurement of Human’s Palm Hand Flaviana F; Risti Suryantari
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 5, No 01 (2015): IJAP Volume 05 Issue 01 Year 2015
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v5i01.272

Abstract

Temperature is one of the most important parameters that represent human’s health condition. Some conventional measurements have not been fully accurate, concise, and precise, so Thermochromic Liquid Crystal (TLC) material is required, that based on its structure of molecule characteristics has respond for alteration of local temperature that indicated by color gradation.The purpose of this research is to perform and to learn the application of TLC-based measurement system in the palm of human’s hands. The benefit of this study is the result of that subject’s temperature mapping provides some opportunities for patients with painful diabetic neuropathy, which lead to ulceration in their foot or hand. The method has been developed using TLC system based on Flaviana’s research in 2012 and with specific setting, hardware and software, in order to acquire image(s). This system utilizes an image processing method, hue of the image is used as parameter, based on mathematical morphology operation.
Bedrock identification using refraction seismic method in establishment location of Hospital Education Sebelas Maret University Murteza Nur Isnani Rahmawati; Budi Legowo; Artono Dwijo Sutomo
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 01 (2014): IJAP Volume 04 Issue 01 Year 2014
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i01.1162

Abstract

A research of refraction methods in estabilishment location Hospital Education Sebelas Maret University has been done on October 31 2012 with P.A.S.I Seismograph Mod. 16S24 seismic refraction instruments with 24 geophone. This research in order to determine the depth of bedrock in the estabilishment location hospital education Sebelas Maret University. In this data acquisition, the travel time data was a distance function. Processing and interpretation data used Intercept Time Method. Intercept Time Method used value of intercept time concept from travel time curve. This interpretation which resulted P wave velocities and layer rocks thickness in three line which scattered in area of survey. The result was that we were able to obtain bedrock having the depth of 4 meters until 9 meters and heaving spreading velocity 1079 m/s – 1182 m/s is interpreted as talus deposits, sandstone, clay, loam, loess, sand and gravel.
Metode Elektrooptis sebagai Pendeteksi Radikal Bebas dan Prospek untuk Evaluasi Total Mutu Minyak Goreng K Sofjan Firdausi; Heri Sugito; Ria Amitasari; Sri Murni
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 3, No 01 (2013): IJAP VOLUME 03 ISSUE 01 YEAR 2013
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v3i01.1218

Abstract

One main problem of standard methods for determination of frying oil quality is various parameter of indicators with their various wide of methods or equipments. In this research we proposed a new method for determination of oil quality using single electrooptics parameter to replace previous indicators. The samples used in the experiment were various conditions of palm oils from the same brand. The level of oil quality was proposed by the value of 2, which represents as the relative number of free radicals produced in the sample. The change of polarization was measured by the value of as the samples were induced by an external electric field using high voltage dc power supply. At room temperature of 28 C electrooptics method seems capable to detect free radicals and to distinguish all kinds of palm oils. This method has an opportunity to provide a single parameter of oil quality and an evaluator of halal or authentic food from fats.
Penerapan Metode Geolistrik Untuk Identifikasi Pola Penyebaran Zona Asin Di Bledug Kuwu, Grobogan, Jawa Tengah Darman D; Cari C; Darsono D
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 2, No 02 (2012): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v2i02.1298

Abstract

Geoelectrical is one of geophysics methods which is used to investigate the early stage in the shallow exploration. The research is conducted at Bledug Kuwu with Schlumberger configuration method containing the two points of potential electrodes and the two points of electrical current electrodes. The equipment used in this research are OYO model 2119C, GPS, meter roll, cable as current and potential electrodes. The purpose of the research is to identify the spreading pattern of salty zone at Bledug Kuwu. The distribution pattern of salty zone is characterized by thickness of 1.55 to 71.9 meters and rangeresistivity of 0.055 to 0.460 Ωm. At west of large Bledug, the salty zone is detected at the depth of 5.0 to 10.0 meters and 30.0 to 50.0 meters. Meanwhile at east of large Bledug, the salty zone is detected at the depth of 5.0 to 15.0 meters and 40.0 to 60.0 meters. The salty zone spread from north to south at both west and east of large Bledug with resistivity of 0.05 to 0.50 Ωm at depth of 5.0 to 50.0 meters.
Pengamatan In-Situ Tekanan dan Temperatur pada Pembentukan MgH2/Ni melalui Metode Reactive Mechanical Alloying (RMA) untuk Aplikasi Material Penyimpan Hidrogen Erfan Handoko; Aditia Pradipta; Bambang Soegijono; Zulkarnain Jalil
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 4, No 02 (2014): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v4i02.4982

Abstract

The observation on reactive mechanical alloying (RMA) process had been done to form MgH2 material with adding Ni nanoparticles as catalist for hydrogen storage material applications. Pressure and temperature of material forming were recorded by microcontroller set for 30 minutes. Mg with adding Ni 5 wt % was milled by High Energy Ball Mill (HEBM) at H2 atmosphere in 1 atm of pressure. The measurement results showed that the pressure had been changed and temperature also changes up to 38oC. This process proves that the alloying betwen Mg and H2 had been formed. The X-ray diffraction pattern identify MgH2 phase. SEM image showed the morphology of MgH2 particles.
Penyelidikan Zona Longsor dengan Metode Resistivitas dan Analisis Stabilitas Lereng untuk Mitigasi Bencana Tanah Longsor Muwardi Sutasoma; Adi Susilo; Eko Andi Suryo
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 7, No 1 (2017): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v7i1.8784

Abstract

Research using geoelectric resistivity dipole-dipole configuration and slope stability analysis has been done in the area Jawar, District Dampit to find out the sliding plane landslide, landslide direction and factor of safety. Tracks Retrieval of data by the method of geoelectric resistivity as much as 5 tracks with the direction of the southeast to the northwest three tracks with a length of 100 m - 200 m and southwest to northeast as many as two passes with a length of 200-300 m. While the slope stability analysis performed topographic map data retrieval and data collection sondir and boring. Based on the analysis of the lithology of the study area using resistivity geoelectric method shows three layers of soil is clay (the top layer), tuff (middle layer) and basalt and lava (bottom layer). sliding plane landslide area is in the boundary between the layers of clay and tuff (a depth of 10.5 m). Based on the results of data processing of 3D resistivity geoelectric, landslide direction is southeast. Safety factor value of the security research area based slope stability analysis is 1.015. This value indicates that this area is prone to landslides.
Back Matter Vol 06 No 01 2016 MOhtar Yunianto
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 6, No 01 (2016): April
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v6i01.19962

Abstract

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