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Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics

al-fiziya
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Published by Universitas Islam Negeri Syarif Hidayatullah Jakarta

ISSN : 26210215 EISSN : 2621489X DOI : -

Core Subject : Science, Engineering,

Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology 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.

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Articles 154 Documents

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Correlation between Scattering Matrix, Return Loss and Interface Reflection Loss in Nicolson Rose Wear Approximation Wakid Ali Muntoha; Adam Badra Cahaya; Azwar Manaf
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.5, N
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v5i2.22353

The phenomenon behind the absorption of electromagnetic waves by absorbingmaterials is resonance phenomenon. When there is a similarity between the value of theimpedance of electromagnetic waves in the air and the impedance of the material, theabsorption of energy by the material is maximized. The phenomenon is measured using anauxiliary instrument, namely the Vector Network Analyzer. This instrument is very effective forcalculating the absorption value of electromagnetic waves. However, the Vector NetworkAnalyzer instrument which is mostly available in Indonesian research institutions cannot directlydisplay the reflection loss of the electromagnetic wave absorbing material. An effective methodthat is effective for calculating the absorption in electromagnetic wave absorbing material isNicolson Rose Wear method. In this article, we design a computational tool based on NicolsonRose Wear approximation to calculate the reflection loss values from scattering matrix andcomparing it with return loss, which is often mistook as reflection loss.

Water Level Detection System based on Arduino and LabVIEW for Flood Monitors using Virtual Instrumentation Sabar Sabar; Dewi Maulidah Nur Anjani; Sastra Kusuma Wijaya
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 : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v4i1.19808

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.

Perancangan Sistem Kontrol Otomatis Berbasis Web Menggunakan Raspberry Pi 3 pada Smarthome Wais Al Qorni; Anugrah Azhar; Elvan Yuniarti
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.1
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v1i2.9501

Biasanya manusia mengontrol perangkat elektronik rumah dengan cara manual tetapi dengan penerapan rumah cerdas maka perangkat elektronik dapat dikontrol dengan menggunakan satu pengontrol pusat saja. Berdasarkan hal tersebut maka diperlukan sebuah mini pc yaitu sebuah perangkat komputer kecil atau mini. Mini pc yang digunakan adalah Raspberry pi, dengan Raspberry Pi yang menerapkan teknologi jaringan wireless dan wire yang dihubungkan dengan teknologi smartphone yang saat ini menjadi reward dalam perkembangan dunia teknologi. Tujuan penelitian ini adalah mendapatkan kemudahan dalam mengontrol perangkat elektronik yang ada didalam rumah dengan cara pengontrolan terpusat pada sebuah smartphone android. Sistem yang dirancang untuk mengontrol aktif dan non-aktif. perangkat seperti lampu, kipas angin, dan televisi ini dirancang dengan menggunakan LXTerminal pada raspbian, bahasa Python dan Android Studio sebagai sarana untuk membuat perangkat lunaknya. Pengujian dilakukan dengan menampilkan beberapa menu pada display aplikasi disertai dengan meletakkan seluruh perangkat keras yang sudah disusun dengan baik. Hasil pengujian menunjukkan bahwa perangkat elektronik seperti lampu, kipas angin, dan televisi berhasil dilakukan pengontrolannya (aktif dan non-aktif).,

Testing the Bending Strength of Carbon Fiber Composites using the vacuum infusion and vacuum bagging method on the UAV Skywalker 1900 Fuselage Material Chandra Febriyanto; Ferry Setiawan; Ikbal Rizki Putra
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.6, N
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v6iI.30562

The purpose of this study was to determine the bending strength of carbon fiber composite materials with lycal epoxy resin on the Skywalker 1900 UAV. Composites will be made for test specimens with carbon fiber combined with lycal resin using vacuum infusion printing and vacuum bagging methods. From these two methods a sample of specimens will be made for testing using a bending test using the three point bending method to determine the bending strength value of the fuselage material. As for another test, namely microphotos, the process of observing this microstructure can find out how the shape, size, and distribution of second phase particles have an important role in knowing the properties of the material itself. The results of the test specimens were compared between vacuum infusion printing and vacuum bagging and then the best value was sought between the two methods. The results were obtained after testing where the two methods of printing and micro-photos obtained the best results in vacuum bagging. In the vacuum bagging process, the highest value was found in specimen b2 with a bending stress value of 1201.90Mpa and the lowest yield was found in specimen i1 with a bending stress value of 1017.74Mpa. Then the micro photo test can be seen in the vacuum bagging printing process, the penetration of the resin in bagging to the fiber is better.

Sintesis dan Analisis Struktur Material Aktif Katoda LiFe0,7Mn0,2Ni0,1PO4 Betty Haifa Sarwono; Sitti Ahmiatri Saptari; Bambang Prihandoko
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.1
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v1i1.8998

Abstrak. Sebuah sintesis material katoda LiFe0,7Mn0,2Ni0,1PO4 dengan metode solid-state telah selesai dilakukan. Bahan dasar yang digunakan adalah LiOH.H2O, α-Fe2O3, MnO2, Ni dan H3PO4. Bahan yang digunakan ada yang berasal dari bahan baku lokal yaitu α-Fe2O3 dan MnO2 dan sisanya menggunakan bahan import dari china. Pada penelitian ini digunakan variasi waktu sintering yaitu 4 jam, 6 jam,8 jam dan total 10 jam dengan temperatur 800oC. Karakterisasi dilakukan dengan menggunakan pengujian Difraktometer Sinar-X (XRD). Analisis data XRD dilakukan dengan menggunakan perangkat lunak PDXL Rigaku. Hasil analisis menunjukkan bahwa sintering pada temperatur 800oC selama total 10 jam menghasilkan fasa LiFe0,7Mn0,2Ni0,1PO4 yang satu fasa. Dan co-doping Mn dan Ni berhasil didoping pada LiFePO4. Abstract. Synthesis Cathode material, LiFe0,7Mn0,2Ni0,1PO4, has been synthesized by the solid-state method. Basic materials that used in this research are LiOH.H2O, α-Fe2O3, MnO2, Ni, and H3PO4. Several basic materials that used in this research obtained from the local raw material such as α-Fe2O3 and MnO2, and the remaining materials obtained by importing from China. Sintering time in this research are varied from 4 hours, 6 hours, 8 hours, and 10 hours, and all varied time are treated at 800°C. The characterization that used in this research is X-Ray Diffractometer (XRD). XRD data are analyzed using PDXL Rigaku software. The results of this research show that sintering at 800°C during total time 10 hours yields LiFe0,7Mn0,2Ni0,1PO4 in one phase. Co-doping Mn and Ni had been successfully doped in LiFePO4.

Analysis of Subsurface Structure of Sembalun Geothermal Prospect Area, East Lombok with 2D and 3D Gravity Modeling Nanda Ridki Permana; Belista Gunawan; Muhammad Nafian
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.5, N
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v5i2.24943

Abstract. The existence of Indonesian geothermal is estimated to be spread in 331 locations, one of which is Sembalun, East Lombok Regency. Therefore, this study was conducted to analyze the subsurface structure of geothermal prospect areas in the area using gravity methods. Gravity data used is satellite data as much as 4275 measurement points that have been corrected free air (FAA). The data processing stage resulted in a Complete Bouguer Anomaly (CBA) map with low anomaly values to be the target of research ranging from 58.9 – 115.7 mGal located in the east (Sembalun-Bumbung) and northeast (Sembalun-Lawang). The prospect of geothermal is controlled by the Talaga fault and Pusuk fault on the caldera floor (Sembalun-Lawang). In addition, the Tanakiabang fault and the Orok fault are near the manifestation of Sebau Hot Springs and on the Caldera floor (Sembalun-Bumbung). The results of 2D modeling correlated with 3D modeling conducted inversions showed geothermal sources are estimated to have a density of 2.68 gr/cc – 3 gr/cc consisting of hornblende andesite lava rocks with a depth of >2500, reservoir layer in the form of sand that has a density of 1.4 gr/cc - 1.72 gr/cc with a depth of 700 - 1200 m and a layer of a hood in the form of alluvium rocks that have a density of 1.8 gr/cc - 2.2 gr/cc with a depth of 0 - 500 m.

Investigation of Thermal Properties of Half-Heusler Alloy FeVZ (Z= As, P, Sb) within Density Functional Theory Anugrah Azhar
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 : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v4i1.19615

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.

Design and Control Underwater Robot Based on Smartphone Lamin Rene Loua; Dewi Lestari; Elvan Yuniarti; Rista ‎‎‎‎‎‎‎‎‎‎‎‎‎‎‎‎‎‎‎‎
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.6, N
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v6iI.32368

Underwater robot is a type of robot specially designed and configured to operate underwater, especially in seas, rivers, and lakes. The main purpose of underwater robots is to perform various tasks and missions underwater, which are often difficult or dangerous for humans to carry out. The method used to design the underwater robot is with a smartphone control system. The robot can move according to the user's commands by being connected through a internet network, allowing the robot and smartphone to be interconnected. This underwater robot is equipped with a camera and two lamps, and the images captured by the camera are displayed on a personal computer. Meanwhile, the lights are controlled by the user using a smartphone. The research results show that the underwater robot can be controlled to a depth of 0.5 meters with an average button press speed of 1 second in floating conditions and 2.9 seconds at a depth of 15 centimeters. The application of this robot can take photos, display good images, and monitor activities underwater. In addition, the captured image from underwater robot are also good and the image produced are clearly visible both on land and in the water.

Analisa Gangguan Medan Magnet Kereta Api Listrik terhadap Pengamatan Geomagnet Syamsul Hidayat Lubis; Sutrisno Sutrisno; Litanya Oktonovrilna
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics | Vol.1
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v1i2.9502

Peristiwa gangguan medan magnet yang dihasilkan oleh kereta api listrik DC (Direct Current) tidak hanya berasal dari arus motor traksi, namun juga dari arus kebocoran ke tanah, hal ini menjadi permasalahan besar bagi pengamatan geomagnet dan penelitian elektromagnet lainnya. Perhitungan secara teoritis yang memungkinkan adanya pendekatan kuantitatif dari dampak magnetik dari kereta api listrik DC termasuk arus bocor ke tanah dapat di jelaskan pada penelitian ini. Validitas dari model teoritis dapat diverifikasi dengan perngamatan langsung di titik lokasi dari stasiun Tangerang sampai dengan stasiun Duri. Pengamatan gangguan medan magnet kereta api listrik ini menggunakan sensor magnet tipe LEMI – 018 MAGNETOMETER yang berada pada stasiun pengamatan Geofisika klas 1 BMKG (Badan Meteorologi Klimatologi dan Geofisika) kota Tangerang. Perhitungan numerik menggunakan metode ARIMA (Auto Regression Moving Average) pada software MATLAB mengindikasikan tingkat gangguan maksimum sebesar 27 nT pada komponen F. Titik koordinat sensor, posisi gardu listrik dengan kereta, dan arus traksi serta arus kebocoran ke bumi menjadi faktor penting dalam penelitian ini

SOIL VULNERABILITY ASSESSMENT USING THE HORIZONTAL AND VERTICAL SPECTRUM RATIO (HVSR) METHOD OF AMBIENT NOISE WAVES, EAST JAVA ,INDOSEIA eka nurjanah wulandari; Moh Iqbal Tawaka;
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.5, N
Publisher : Physics Study Programme, Faculty of Science and Technology UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/fiziya.v5i2.17226

The local site effect determines the risk level of an earthquake. East Java has a high level of seismicity. One of the earthquake mitigation efforts is to estimate the dynamic characteristics of grounf using microtremors. The purpose of this study was to determine the natural frequency distribution, amplification factor, and seismic vulnerability index. Seismic signals are obtained from stationary and temporal seimograph records from 100 measurement locations installed in the East Java and Madura regions. This study uses the horizontal and vertical spectrum ratio (HVSR) curve analysis method popularized by Nakamura (2000). The results of the study showed that the seismic vulnerability index varied from 0.25 to 54.2. Areas that have a high level of earthquake risk include Bangkalan, Gresik, Jombang, Lumajang, Malang, Mojokerto, Pasuruan, Ponorogo, Sampang. Sidoarjo, and Surabaya. Based on the history of destructive earthquakes, this area has experienced earthquake intensity ranging from III - IX MMI.

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