Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics is a journal of physics that published by Departement of Physics, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta. The aim of the journal is to disseminate the researches done by researchers both from Indonesian and overseas. This journal focused on physics field including Materials Sciences, Geophysics, Instrumentation Physics, and Theoretical Physics. AL-FIZIYA is also dedicated to preserving the transmission of knowledge of science. The journal welcomes contributions from scholars around the world in the physics field, both in English and Bahasa.
Articles
154 Documents
<![CDATA[Water Level Detection System based on Arduino and LabVIEW for Flood Monitors using Virtual Instrumentation ]]>
<![CDATA[Sabar Sabar]]>;
<![CDATA[Dewi Maulidah Nur Anjani]]>;
<![CDATA[Sastra Kusuma Wijaya]]>
<![CDATA[ Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.4 ]]>
Publisher : <![CDATA[Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta ]]>
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DOI: 10.15408/fiziya.v4i1.19808
<![CDATA[This virtual instrumentation system based on Arduino and LabVIEW aims to detect the water level using a water level sensor. The water level sensor used to measure the water level is the Funduino type. This sensor and the buzzer module are connected to the Arduino Uno to transmit data to LabVIEW. When the water has reached a certain height, this sensor will detect the water level. When the water has reached the set point, this sensor will sound a buzzer as a sign that the water is full. Based on the experimental results, it is found that the tension value affects the volume of the experiment site. Where the greater the volume used will produce a large voltage, and vice versa. Furthermore, the graph results obtained that are still away from the linearity of a regression function with a value of y = 0.0079x + 1.8561 and R² = 0.4298.]]>
<![CDATA[Paramagnetic and Diamagnetic Susceptibility of Infinite Quantum Well ]]>
<![CDATA[Adam Badra Cahaya]]>
<![CDATA[ Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.3 ]]>
Publisher : <![CDATA[Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta ]]>
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DOI: 10.15408/fiziya.v3i2.18119
<![CDATA[Paramagnetism and diamagnetism of a material characterized by its magnetic susceptibility. When a material is exposed to an external magnetic field, magnetic susceptibility is defined as the ratio of the induced magnetization and the magnetic field. A paramagnetic material has magnetic susceptibility with positive sign. On the other hand, a diamagnetic material has magnetic susceptibility with negative sign. Atomically, paramagnetic materials consist of atoms that has orbital with unpaired electrons. Theoretical study of paramagnetic susceptibility and diamagnetic susceptibility are well described by Pauli paramagnetism and Landau diamagnetism, respectively. Although paramagnetism and diamagnetism are among the simplest magnetic properties of material that are studied in basic physics, theoretical derivations of Pauli paramagnetic and Landau diamagnetic susceptibility require second quantization formalism of quantum mechanics. We aim to discuss the paramagnetic and diamagnetic susceptibilities for simple three-dimensional quantum well using first quantization formalism.]]>
<![CDATA[Investigation of Thermal Properties of Half-Heusler Alloy FeVZ (Z= As, P, Sb) within Density Functional Theory ]]>
<![CDATA[Anugrah Azhar]]>
<![CDATA[ Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.4 ]]>
Publisher : <![CDATA[Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta ]]>
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DOI: 10.15408/fiziya.v4i1.19615
<![CDATA[The figure of merit (ZT) holds an important role in thermoelectric material that indicates the efficiency of thermoelectric (TE) devices. The higher ZT value, the higher efficiency would be obtained of TE devices. One of the sub-class materials that has high potential application for thermoelectric material is half-Heusler (HH) alloy. In order to investigate the ZT value of HH conduct simulation using to investigate the ZT value of HH alloy FeVZ (Z= As, P, Sb) by using density-functional theory (DFT). Our research results show that FeVAs has higher ZT values than FeVP and FeVSb in the range temperature of 150-900 K. All of those compounds still have good ZT value around ~0.7 even in the temperature regime of 900 K, and shows a good trend for p-type thermoelectric materials.]]>
<![CDATA[Solusi Metrik Kerr-Newman Untuk Dimensi Ruang-waktu 3+1 Dengan Invariansi Rotasi Anisotropik ]]>
<![CDATA[Iqbal Lafifa Zulfa]]>;
<![CDATA[Rangga Prasetya Alamsyah]]>;
<![CDATA[Arine Fitriani]]>
<![CDATA[ Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.3 ]]>
Publisher : <![CDATA[Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta ]]>
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DOI: 10.15408/fiziya.v3i2.18600
<![CDATA[Metrik Kerr-Newman merupakan solusi umum dari persamaan medan Einstein dengan mengasumsikan metrik ruang waktu melengkung akibat keberadaan objek masif bermassa dan bermuatan, serta memiliki simetri anisotropik akibat rotasi. Metrik Kerr-Newman untuk dimensi ruang-waktu 3+1 diformulasikan pertama kali oleh Ezra Newman. Algoritma umum untuk memformulasikan metrik ini yaitu dengan menggunakan persamaan medan Einstein secara eksplisit, yang meliputi kalkulasi koneksi affine, tensor Ricci hingga tensor energi-momentum. Dimana, formulasi ini tidaklah sederhana. Untuk menyederhanakan formulasi metrik Kerr-Newman untuk dimensi ruang-waktu 3+1, pada artikel ini dilakukan formulasi dengan algoritma alternatif tanpa menggunakan persamaan medan Einstein secara eksplisit. Kemudian, karena algoritma alternatif ini tidak menggunakan persamaan medan Einstein secara eksplisit dan supaya memperoleh solusi metrik Kerr-Newman secara utuh, maka digunakan prinsip limitasi properti metrik Kerr-Newman untuk membawa persamaan medan Einstein secara implisit. Berdasarkan prinsip limitasi properti metrik Kerr-Newman, dilakukan rekayasa matematis atas fungsi temporal serta fungsi radial dari metrik Reissner-Nordstrom dan metrik ruang-waktu datar dari sistem simetri anisotropik akibat rotasi, yang diturunkan dari transformasi koordinat elipsoid oblate. Dan meski formalisme dengan algoritma alternatif ini relatif sederhana, solusi metrik Kerr-Newman untuk dimensi ruang-waktu 3+1 pada artikel ini serupa dengan hasil formalisme dengan algoritma umum.]]>
<![CDATA[2D Forward Modeling Geothermal System Gravity Data in South Solok Region, West Sumatra ]]>
<![CDATA[Muhammad Nafian]]>;
<![CDATA[Belista Gunawan]]>;
<![CDATA[Nanda Ridki Permana]]>
<![CDATA[ Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.4 ]]>
Publisher : <![CDATA[Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta ]]>
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DOI: 10.15408/fiziya.v4i1.20235
<![CDATA[Indonesia has the greatest potential for geothermal energy in the world. Geothermal has an important role as an alternative fuel because it is a renewable energy source, but its use has not been maximized. One of the areas that have the greatest potential for geothermal energy in South Solok, West Sumatra. Therefore, this study was conducted to determine the geothermal system in the South Solok area, West Sumatra by using the gravity method. The gravity data processing stage requires some software to get the CBA value(Complete Bouguer Anomaly), map contours of the CBA. Anomaly separation with the butterworth filter method, determination of residual anomaly slice points, and 2D modeling of geothermal systems. Based on modeling, the qualitative interpretation interprets the Complete Bouguer Anomaly map which is suspected as a geothermal prospect area is a low anomaly ranging from 7.9 mgal - 9.4 mgal which is marked in dark blue. Meanwhile, quantitative interpretation produces modeling of the AB and CD slicing with a total of four layers. This layer consists of clay rock as a cap rock, sandstone as a reservoir, granite as a heated rock as a heat source, and the last layer in the form of magma as a heat source. The anomaly modeling of these two sections is dominated by granite rock with a density value of 2500 kg/m3 for the AB section and 2550 kg/m3 for the CD section.]]>
<![CDATA[ANALISIS DATA INDUCED POLARIZATION DALAM MENDUGA ZONA MINERALISASI LOGAM DAERAH GODEAN, KABUPATEN SLEMAN DIY ]]>
<![CDATA[Chandra Agus Rivananta]]>;
<![CDATA[Refita Khumayroh]]>
<![CDATA[ Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.3 ]]>
Publisher : <![CDATA[Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta ]]>
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DOI: 10.15408/fiziya.v3i2.18159
<![CDATA[Keberadaan logam tersebar di dalam batuan dan biasa terikat dengan mineral bijih dan unsur kimia lainnya. Keberadaan mineral itu sendiri berhubungan dengan naiknya larutan hidrotermal dipermukaan melalui celah-celah batuan kemudian terendapkan. Pengendapan mineral yang terjadi di celah/rekahan/rongga batuan menyebabkan keberadaan mineral logam tersebar dan tidak terkonsentrasi di satu titik. Metode geofisika yang mampu memberi gambaran bawah permukaan mengenai keberadaan mineral logam di dalam batuan yaitu Metode Induksi Polarisasi (IP) kawasan waktu dengan menggunakan konfigurasi dipole-dipole. Metode IP mengamati polarisasi yang terjadi pada batuan yang mengandung mineral logam ketika batuan di aliri arus listrik. Hasil pengolahan data IP berupa penampang 2D dengan parameter yang terukur yaitu nilai chargeabilitas dan nilai resistivitas merupakan parameter untuk menentukan keberadaan zona mineralisasi logam. High chargeabilitas yang didukung dengan low resistivitas mengindikasikan adanya zona mineralisasi logam di daerah tersebut. Pada daerah penelitian, pada lintasan 1 nilai resistivitas yang terukur yaitu 9,84 Ωm – 1803 Ωm (Penampang pertama) dan nilai chargeabilitas yang terukur adalah 0 ms – 140 ms (Penampang kedua). Pada lintasan 2 nilai resistivitas yang terukur yaitu 12,5 Ωm – 743 Ωm (Penampang pertama) dan nilai chargeabilitas yang terukur adalah 0,0013 ms – 52,3 ms (Penampang kedua). Daerah penelitian terdapat zona mineralisasi pirit dominan dengan kadar sulfida Cu-Pb-Zn sangat rendah]]>
<![CDATA[Design and Build Underwater Robot Control System Based on PID (Proportional Integral Derivative)) ]]>
<![CDATA[Rista .]]>;
<![CDATA[Elvan Yuniarti]]>;
<![CDATA[Dewi Lestari]]>
<![CDATA[ Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Vol.4, N ]]>
Publisher : <![CDATA[Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta ]]>
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DOI: 10.15408/fiziya.v4i2.23173
<![CDATA[Indonesia has wide waters and in it there is very abundant fishery potential such as various species of freshwater and other aquatic biota. The large role of Indonesian waters certainly needs to be supported by a monitoring system that is able to control and monitor conditions underwater, like underwater robot. In this research, the design of an underwater robot based on PID (Proportional Integral Derivative). Robot stability is controlled using PID with feedback from IMU MPU6050 for tilt angle control and feedback from MS5803 pressure sensor for depth position control. This underwater robot is requipped with six DC motors, four DC motors are used to drive the robot in a horizontal direction (forward, backward and turn). In addition, the robot is also equipped with two lamps for lighting the robot. In this research, the underwater robot can maintain stability when given PID parameter values are 0.001 for Kproll, 0.001 for Kiroll, 1 for Kdroll, 0.001 for Kppitch, 0.001 for Kipitch, 1 for Kdpitch, 5 for Kpdepth, 1 for Kidepth and 1 Kddepth.]]>
<![CDATA[Mapping of Peak Ground Acceleration(PGA) using The Kawashumi Model for Sumatera ]]>
<![CDATA[Tati Zera]]>;
<![CDATA[Tati Zera]]>
<![CDATA[ Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Vol.4, N ]]>
Publisher : <![CDATA[Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta ]]>
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DOI: 10.15408/fiziya.v4i2.23282
<![CDATA[The position of the west coast of the island of Sumatra, which is the meeting point of the Eurasian and Indo-Australian plates, has high seismicity due to its tectonic activity. This high level of seismicity indicates that many earthquakes have an effect on ground motion. This study calculates and analyzes the maximum ground motion acceleration (Peak Ground Acceleration - PGA) as the effect of destructive earthquakes in Sumatra for 100 years from January 1, 1920 - December 31, 2020, based on the Kawashumi model. The calculation results give PGA values in the range of 388,190 – 4008,210 gal with a maximum value of 4199.45 gals at 3,295oN, 95,982oE caused by the 9.1 M earthquake on Andaman Island on December 24, 2004. While the minimum PGA value is 314.9 gals located at 4.438oLS - 101.367oBT caused by the Bengkulu 8.4 M earthquake. This calculation results in a map showing a high PGA pattern in the northern part of Sumatra and decreasing towards the south. This shows that destructive earthquakes that occur in the northern part of Sumatra Island pose a greater risk of ground movement compared to destructive earthquakes that occur in the southern part of Sumatra Island. This PGA pattern is different from several previous studies]]>
<![CDATA[Assessment of Number of Layers on Tensile and Bend Strength of HB 500 and ST 42 Dissimilar Weldments ]]>
<![CDATA[Cut Fitria]]>;
<![CDATA[Arif Tjahjono]]>;
<![CDATA[Iwan Setiawan]]>
<![CDATA[ Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Vol.4, N ]]>
Publisher : <![CDATA[Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta ]]>
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DOI: 10.15408/fiziya.v4i2.22575
<![CDATA[The joining of several materials with different characteristics has been widely carriedout for industrial progress, especially to obtain material characteristics that are superior to theprevious one. One of the most common joining techniques is welding. This research wasconducted to determine the weldability of different steels with the number of layers varyingbetween 3 and 4 layers. The object of this research is the welded connection of HB 500 wear-resistant steel plate with ST 42 construction steel plate where the thickness of each material is 10mm. Welding with the Gas Metal Arc Welding (GMAW) method employes ER 70 S filler metal ineach layer and currents from 90 A to 180 A at each connection. Tensile and bending tests werecarried out as a characterization of the weld area to determine its mechanical properties. Theresults show a significant effect of the number of layers on the quality of the connection. Theoptimum value is formed in the number of infill layers as much as 4 layers with tensile strengthof 448.37 - 473.292 MPa, yield stress of 305.767 - 317.493 MPa, elongation of 33.8 - 34.56%, andable to bend under load 874,498 - 919,544 MPa with angle formed are 85.414° on the root and86.14° on the face.]]>
<![CDATA[Improved Steepest Descent Method using Modified Bessel Function K_(1/4 ) for Gamma Function Evaluation ]]>
<![CDATA[Adam Badra Cahaya]]>
<![CDATA[ Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Vol.4, N ]]>
Publisher : <![CDATA[Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta ]]>
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DOI: 10.15408/fiziya.v4i2.21843
<![CDATA[Steepest descent method employs a Gaussian function when approximating an integral of a function. In this article we improve the approximation by using function in the form of . As an example, we approximate the value of gamma function to provide improved approximation for Stirling formula that is often used for estimating factorial of a large number.]]>
