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Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics
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.
Arjuna Subject : -
Articles 154 Documents
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Synthesis and Characterization of Activated Carbon From Biomass Waste as A Microwave Absorber Material Nuras, Muhammad Ishaq; Saptari, Sitti Ahmiatri; Tjahjono, Arif; Priambodo, Danang Pamungkas; Haiqal, Amanda
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.7, 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.v7i1.41310

Abstract

Excessive use of electronic technology can result in harmful radiation and electromagnetic interference, which pose risks to human health. To address this issue, researchers developed a material designed to absorb electromagnetic waves. The study focused on synthesizing and characterizing activated carbon derived from biomass waste, including water hyacinth, melinjo seed shells, and chicken eggshells, with the goal of reducing electromagnetic wave interference. The research process involved several key steps: washing the biomass materials, followed by carbonization, activation using a 65% KOH solution, and subsequent characterization of the material. The tests revealed that the activated carbon possessed a porous structure, which is essential for its absorption capabilities. The surface areas measured were 4.378 m²/g for water hyacinth, 2.518 m²/g for melinjo seed shells, and 2.992 m²/g for chicken eggshells. These surface areas are indicative of the material's potential effectiveness. Additionally, the microwave absorption capacities of the activated carbon were recorded as -18.342 dB for water hyacinth, -13.326 dB for melinjo seed shells, and -12.484 dB for chicken eggshells. These findings suggest that the activated carbons are highly effective as microwave absorber materials, with an absorption efficiency ranging between 94% and 98%.Excessive use of electronic technology can result in harmful radiation and electromagnetic interference, which pose risks to human health. To address this issue, researchers developed a material designed to absorb electromagnetic waves. The study focused on synthesizing and characterizing activated carbon derived from biomass waste, including water hyacinth, melinjo seed shells, and chicken eggshells, with the goal of reducing electromagnetic wave interference. The research process involved several key steps: washing the biomass materials, followed by carbonization, activation using a 65% KOH solution, and subsequent characterization of the material. The tests revealed that the activated carbon possessed a porous structure, which is essential for its absorption capabilities. The surface areas measured were 4.378 m²/g for water hyacinth, 2.518 m²/g for melinjo seed shells, and 2.992 m²/g for chicken eggshells. These surface areas are indicative of the material's potential effectiveness. Additionally, the microwave absorption capacities of the activated carbon were recorded as -18.342 dB for water hyacinth, -13.326 dB for melinjo seed shells, and -12.484 dB for chicken eggshells. These findings suggest that the activated carbons are highly effective as microwave absorber materials, with an absorption efficiency ranging between 94% and 98%.
SYNTHESIS AND CHARACTERIZATION OF ACTIVATED CARBON FROM MALAPARI PRESS CAKE, MALAPARI SHELL, AND CASSAVA PEEL A'yuni, Sayida Ma'wa; Kumila, Biaunik Niski; Tjahjono, Arif
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.7, 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.v7i2.46256

Abstract

Activated carbon is increasingly used in various applications, prompting researchers to innovate by utilizing biomass as a source for activated carbon. This study used biomass waste from malapari press cake, malapari shell, and cassava peel. The process involved carbonizing the samples at 500°C for 2 hours, chemical activation using a 65% (w/v%) KOH solution at a 1:4 ratio, stirring with a magnetic stirrer at 120°C and 300 rpm for 2 hours, followed by physical activation at 550°C for 1 hour, and BET & SEM-EDS testing. Based on the BET test results, the surface area of the samples increased overall between pre- and post-activation. The highest increase in surface area occurred in cassava peel, which increased from 7.916 m²/g to 294.303 m²/g. Meanwhile, the malapari press cake increased from 3.122 m²/g to 11.445 m²/g, and the malapari shell increased from 12.773 m²/g to 105.320 m²/g. SEM-EDS characterization revealed that cassava peel contained the highest carbon content at 67.02%, and after activation, each sample exhibited porous surfaces, uneven textures, and various pore shapes. ImageJ software analysis showed cassava peel had the smallest pore size at 123.209 nm, compared to malapari press cake at 234.721 nm and malapari shell at 217.419 nm. These results indicate that samples with larger surface areas tend to have smaller average pore sizes.
DESIGN OF SAFETY FACTORS FOR LANDSLIDE POTENTIAL AND ANDESITE MATERIAL SLOPES GEOMETRY Haryono, Ahmad Fauzan; Razak, Supardi; Kusumaningsih, Dewi Ayu
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.7, 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.v7i2.42160

Abstract

This research was conducted because the material absorption capacity needs to be maximized, so it is necessary to make a mining slope geometry with an optimal safety factor value so that there is no potential for landslides in the research area. The method used is the morgenstern price method, this method was chosen because it has considered the stability of moments and forces.The actual slope geometry that has not been tested for safety needs to be changed. The physical and mechanical properties data collection is processed to produce a geometric model with a safety factor in accordance with applicable regulations. The actual slope geometry of the Cijurey block is 20m with a slope of 85o, 8m with a slope of 88o, 5m with a slope of 83o and 4m with a slope of 85o with a safety factor value of 1.01. A geometric change was made with a slope height of 6 m and a ladder width of 3m which was made multi-level with an overall angle of 80o having a safety factor of 1.302 which means that it has met the slope safety criteria.Keywords: safety factor, geometry, slope
ANALYSIS OF SEISMICITY AND RETURN PERIOD OF EARTHQUAKES IN SOUTH PESISIR REGENCY WEST SUMATRA PROVINCE USING THE LIKELIHOOD METHOD Husna, Azmi Asmaul; Syafriani, Syafriani; Hamdi, Hamdi; Dwiridal, Letmi
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.7, 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.v7i2.42196

Abstract

The South Pesisir area was one of the areas that was rocked by an earthquake on September 30, 2009. The earthquake that occurred caused damage and loss of life. Based on these conditions, the South Pesisir Regency area was identified as an earthquake-prone area. Therefore, it is necessary to research seismicity and return period in the regency. This research used the statistical likelihood method to determine the accumulated rock stress, seismcity and return period of eartquakes. The data used is earthquake data for the period 1934-2023 with a magnitude ≥4 SR and a depth of ≤300 km. The results of this research provided an overview of the seismicity and return period in the South Pesisir Regency. Seismicity was determined based on rock stress condition (b-value) and on the level seismic activity (a-value). Based on calculations showed that the a-value and b-value for the 20-year and 90-year intervals ranged between 6.16-10.9 and 0.953-2.17, respectively. Earthquakes return periods at intervals of 20 years and 90 years for the magnitude range 4.0-4.4 produced almost the same return period, namely less than one year. Meanwhile, earthquakes with magnitudes of 4.5-6 had recurrence periods ranging from 1 to 63 years.
Microwave Absorption Potential of La0.7[X0.95Y0.05]0.3MnO3 with Dual-Doped Sites {XY = (Ca,Ba), (Ca,Sr), and (Sr,Ba)} Apriatin, Apriatin; Saptari, Sitti Ahmiatri; Tjahjono, Arif
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.7, 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.v7i2.47935

Abstract

The technology in the field of electronic devices is currently advancing in line with the increasing usage by humans. This continuous and growing usage also increases the amount of microwave radiation generated. This leads to wave interference that can disrupt the functionality of application devices. Absorbing materials are a type of material that functions as a microwave absorber. This study engineered lanthanum manganate material, specifically La0.7[X0.95 Y0.05]0.3MnO3 {XY = (Ca,Ba), (Ca,Sr), and (Sr,Ba)}, synthesized using the sol-gel method. The X-Ray Diffraction characterization results showed that each sample has a single-phase orthorhombic structure with a space group of Pbnm (62). The Scanning Electron Microscope–Energy Dispersive Spectroscopy characterization revealed particle morphology with varying particle size distributions on a micro-scale. Based on Vibrating Sample Magnetometer results, the samples La0.7[Ca0.95Ba0.05]0.3MnO3 and La0.7[Ca0.95Sr0.05]0.3MnO3 exhibit paramagnetic properties, while La0.7[Sr0.95Ba0.05]0.3MnO3 exhibits superparamagnetic properties. Through Vector Network Analyzer characterization, it was found that lanthanum manganate doped with Ca, Ba, and Sr demonstrated high electromagnetic wave absorption capabilities, achieving an absorption rate of 97%–98% at frequencies of 10–10.5 GHz. Thus, La0.7[X0.95 Y0.05]0.3MnO3 {XY = (Ca,Ba), (Ca,Sr), and (Sr,Ba)} is a potential candidate as a microwave-absorbing material.
Physics-Guided Multi-Attribute Petrophysical Inversion for Quantifiying Acoustic Impedance and Porosity in the F3 Reservoir Rahman, Fadhlur; Haris, Abdul; Ralanarko, Dwandari; Purba, Humbang; Rulandoko, Wrahaspati; Riyadi, Praditio; Nafian, Muhammad
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.7, 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.v7i2.47186

Abstract

This study introduces a physics-guided multi-attribute inversion (PG-MAI) approach to estimate acoustic impedance and porosity from post-stack seismic data using Bayesian Ridge Regression. The method integrates ten seismic attributes—including amplitude, frequency, and geometric features—into a regularized linear regression framework with Bayesian formulation. Applied to the F3 Block in the Dutch North Sea, the workflow includes temporal upsampling, attribute extraction, and model calibration using two well logs. The inversion results demonstrate high spatial coherence and alignment with geological structures. Validation at both wells shows strong agreement between predicted and measured log values, with correlation coefficients exceeding 0.90 for both acoustic impedance and porosity. Zones of low impedance and high porosity correspond to interpreted deltaic sands and lobate geometries, reflecting the facies heterogeneity of the F3 depositional environment. These outcomes suggest that the inversion framework effectively captures lithological variability, making it valuable for reservoir delineation in similarly complex siliciclastic systems.
DAMAGE ANALYSIS OF INSULATED PIPES USING DIGITAL DETECTOR ARRAY DAN COMPUTED RADIOGRAPHY Tjahjono, Arif; Pratama, Elfriani Dita; Hanuarjie, Baskan; Saptari, Sitti Ahmiatri; Kumila, Biaunik Niski
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.8, 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.v8i1.46385

Abstract

The provision of insulation on the pipe functions to prevent heat transfer, but the provision of this insulation causes the pipe to be susceptible to damage due to oxidation. In this study, an analysis of damage to insulated pipes will be carried out using a Digital Detector Array (DDA), Computed Radiography (CR), and XRF. Based on the test results, it is known that the image quality using DDA with a voltage of 240 kV produces the most optimal contrast resolution. The results of the thickness dimension measurement using the DDA method on insulated pipes are 3.38 mm, and on insulated pipes with artificial defects are 4 mm. Compared with the CR method, the values are 3.02 mm and 3.94 mm, respectively. The smaller the difference, the more accurate. From the calculation of the ISee software, it is also known that the DDA method can detect a greater number of defects, namely 24, compared to the CR method, which has only 14. The results of the XRF test show that the insulated pipe includes low-carbon steel with a carbon content of 0.057% and 94% ferrum. This high ferrous content contributes to increased X-ray absorption, greatly affecting the images quality.
LITHOFACIES INTERPRETATION OF CORE SAMPLES IN THE TANJUNG PASIR BEACH, TELUK NAGA, TANGERANG, BANTEN Suwondo, Suwondo; Azizah, Sundus Ghaida Noor; Krisyunianto, Andi; Budiono, Agus
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.8, 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.v8i1.46849

Abstract

This research was conducted at Tanjung Pasir Beach, Teluk Naga Sub-district, Tangerang Regency, Banten. The objective of this research was to analyze the sedimentary structures, describe lithology, and determine facies in a depositional environment. This facies interpretation can be as a reservoir analogue for subsurface interpretation in the Northwest Java Basin. The research data used include surface sand samples and core samples from Tanjung Pasir Beach. The facies interpretation shows that core at location 1 is dominated by carbonaceous shale with parallel lamination structures, indicating sedimentary of lagoon environment. In contrast, core at location 2 is predominantly composed of medium- to coarse-grained sandstone facies, representing a shoreface environment.
CAFFE VISITOR COUNTER BASED ANDROID ULTRASONIC SENSOR AND BLUETOOTH Lestari, Dewi; Yuniarti, Elvan
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.8, 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.v8i1.41892

Abstract

In the cafe industry, real-time visitor monitoring is a critical challenge for operational optimization. This study develops a visitor counting system based on ultrasonic sensors and Bluetooth communication, designed for cafes in Indonesia. The ultrasonic sensor detects the presence of visitors based on distance, while the data is sent to an Android application via the HC-05 Bluetooth module. With an experimental approach, the system was tested in different scenarios (individual visitors, groups, and walking speed) to evaluate the accuracy. The results show that the sensor is able to identify visitors at a distance of ≤15 cm. Bluetooth integration ensures stable data transmission with a maximum distance of 10 meters. This system provides a cost-effective wireless solution for cafe owners, although further research is needed to overcome the drawbacks in dynamic scenarios.
HAZARD AND RISK MAPPING OF TSUNAMI DISASTER USING HLOSS METHOD CASE STUDY: IDANO GAWO DISTRICT Lubis, Lailatul Husna; Sahputra, Erry; Melati, Tia; Hanova, Yudha
Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics AL-FIZIYA JOURNAL OF MATERIALS SCIENCE, GEOPHYSICS, INSTRUMENTATION AND THEORETICAL PHYSICS VOL.8, 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.v8i1.47189

Abstract

Idano Gawo District, Nias Regency has geographical characteristics that are vulnerable to tsunami. Based on the history of the earthquake in the Nias Islands in 2005, there was a release of megathrust earthquake energy caused by disturbance of the big Aceh earthquake on December 26, 2004. This earthquake was followed by a 2-3 meter high tsunami that hit several coastal areas in the Nias Islands, so disaster mitigation is needed. Mapping tsunami hazards and risks is an important effort for effective mitigation planning, by knowing the area of danger and tsunami risk based on a 16 meter height scenario. The method used in this study is the hloss and cost distance methods. Mapping the level of tsunami hazard and risk with a height of 16 meters using Arcgis Software. For processing tsunami disaster hazard and risk data using Microsoft Excel Software. Bozihona Village is an area that has a high level of danger with a total area of 3.76 km2 and a high level of tsunami risk with a total area of 3.77 km2.

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