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Sahrul Hidayat
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INDONESIA
Jurnal Ilmu dan Inovasi Fisika
Published by Universitas Padjadjaran
ISSN : 25490516     EISSN : 25497014     DOI : http://dx.doi.org/10.24198/jiif
Core Subject : Science, Social, Engineering,
Computer Science & IT Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology
JIIF (Jurnal Ilmu dan Inovasi Fisika) is a scientific journal that contains research results covering theoretical, simulation and modeling studies, experiments, engineering and exploration in the field of Physics and its Applications.
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 197 Documents
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Forward Modeling and Seismic Wave Inversion for Amplification Analysis in The Java Subduction Zone Using Python Yudha, Pradipta Kusuma; Yulianto, Agus
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 10, No 2 (2026)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v10i2.70212

Abstract

This study aims to analyze seismic wave propagation and amplification in the Java subduction zone using a numerical modeling approach. The method integrates forward modeling and seismic inversion within a two-dimensional finite difference framework to simulate wave behavior in heterogeneous subsurface conditions. Secondary data, including seismic velocity, density, and earthquake parameters, are used to construct the subsurface model. The results show that seismic wave propagation is strongly influenced by variations in subsurface properties. High amplification occurs in regions characterized by low shear-wave velocity and thick sediment layers. Quantitatively, amplification exceeds 2.0 in areas with shear-wave velocity below 2000 m/s, while regions with higher velocity (>3000 m/s) exhibit lower amplification values. The application of multi-parameter inversion improves the resolution of subsurface structures and enhances model accuracy. The spatial distribution of amplification identifies zones that are more susceptible to strong ground motion, confirming the dominant role of subsurface heterogeneity in controlling seismic response. This study provides a quantitative and dynamic framework for understanding seismic wave behavior and offers a robust basis for seismic hazard assessment and earthquake risk mitigation in the Java subduction zone 
Zonasi Kerentanan Likuifaksi Berbasis Liquefaction Potential Index (LPI) di Kecamatan Seberang Musi, Kabupaten Kepahiang Qotrunnada, Mutia; Mase, Lindung Zalbuin; Supriani, Fepy; Azzahra, Raisya; Lubis, Aminah Rahmadhani; Misliniyati, Rena; Amri, Khairul
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 10, No 2 (2026)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v10i2.70698

Abstract

This study aims to evaluate and map earthquake-induced liquefaction potential in Kandang and Temdak Villages, Seberang Musi District, Kepahiang Regency. The analysis integrates geotechnical and seismic parameters, including peak ground acceleration, shear wave velocity, earthquake intensity, and soil vulnerability index. The results indicate that the study area is dominated by high ground acceleration and strong to very strong shaking intensity, which act as the main triggering factors of liquefaction. The evaluation of subsurface conditions shows that liquefaction potential mainly occurs in shallow layers composed of loose and saturated soils, while deeper layers tend to be more stable. The liquefaction potential index values vary significantly, ranging from low to very high across different locations. The highest value reaches 76.04, indicating very high liquefaction potential, while the lowest value is approximately 4.45, indicating lower potential. These findings suggest that the thickness and dominance of vulnerable layers at shallow to intermediate depths are the main factors controlling liquefaction potential. Overall, the applied approach provides a representative assessment for identifying liquefaction-prone zones and supports earthquake risk mitigation planning in the study area.
Effect of Annealing Temperature on ZnO Properties for CO2 Reduction Fitrilawati, Fitri; Junita, Tri Komala; Mori, Ersika; Rayhan, Abel; Hendrawan, Kayla Putri; Aprilia, Annisa; Faizal, Ferry
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 10, No 2 (2026)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v10i2.70746

Abstract

Zinc Oxide (ZnO), is a widely researched material for Carbon Capture applications due to its large surface area and adequate band gap. In this study, ZnO was synthesized using the sol-gel method with various annealing conditions, namely without annealing and annealing at 150°C, 300°C, and 450°C. The annealing process is carried out under inert conditions using a flow of nitrogen gas (N₂) to study the possibility of the appearance of defects in the ZnO material related to the process. XRD measurements showed that the size of ZnO crystals increased and there was a more regular structure as the annealing temperature increased. FTIR measurement results show the intensity of vibrational peaks that tend to be narrowed and more defined. SEM measurement results show a more defined morphology with a more uniform and fine particle size in ZnO annealed at 300°C and 450°C, thus affecting the atomic composition. EDS results show that the percentage of atomic O in ZnO decreases, indicating the presence of oxygen vacancies. ZnO that has a large crystal size has a band gap value that tends to decrease (red shift) so that it can slow down the recombination process and can increase its photocatalytic activity. Cylic Voltammetry (CV) test results from with ZnO as electrode, showed that ZnO annealed at high temperatures caused an increase in current density and a more negative potential change
Systematic Literature Review: Utilization of Agricultural Waste as Raw Material for Renewable Energy Biobriquettes Ilahiyah, Fitratul; Ruyani, Aceng; Firdaus, Muhammad Lutfi
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 10, No 2 (2026)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v10i2.68470

Abstract

The global energy crisis and environmental degradation caused by fossil fuel consumption have driven the search for sustainable alternative energy sources. Agricultural waste, which is abundant and often underutilized, has significant potential as raw material for biobriquettes in renewable energy production. This Systematic Literature Review (SLR) aims to comprehensively analyze research related to the utilization of agricultural waste as biobriquette feedstock during the period 2012-2025. The PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) method was used to screen 200 articles from Web of Science, Scopus, and Google Scholar databases, with 40 articles meeting the inclusion criteria. The review results show that agricultural wastes such as rice husks, corn cobs, bagasse, and coconut shells have competitive calorific values (3.000-7.000 cal/g) meeting solid fuel standards. Factors affecting biobriquette quality include raw material type, binder type (tapioca, molasses, clay), compaction pressure (100-1,000 kg/cm²), and particle size. Indonesia, with agricultural waste production reaching 136 million tons per year, has biomass energy potential of 49.810 MW. Biobriquette development not only offers effective waste management solutions but also contributes to greenhouse gas emission reductions of up to 335.679 tons CO₂-eq per 100,000 tons of biobriquettes. This SLR identifies research gaps and provides recommendations for developing more efficient and sustainable biobriquette technology.
Analysis of Air Preheater Effectiveness using The Number Transfer Unit (NTU) Method Before and After Overhaul of Unit 2 of The West Java Palabuhan Ratu PLTU Fitriyani, Elsa; Nurhilal, Otong; Setianto, Setianto
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 10, No 2 (2026)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v10i2.71545

Abstract

The air preheater (APH) is a heat exchanger component that plays a crucial role in improving boiler combustion efficiency through the reuse of hot exhaust gases. Continuous use of the APH at the Jabar 2 Palabuhan Ratu PLTU can lead to a decline in performance, characterized by reduced heat transfer effectiveness. To restore APH performance, an overhaul was performed, including cleaning and replacing the elements. The analysis was based on actual operating data by comparing pre- and post-overhaul conditions at nearly equivalent loads using the NTU-effectiveness method, as well as calculating the effect of O₂-based air leakage. The results showed that the overhaul improved the APH's performance. Under pre-overhaul conditions with a load of 333.86 MW, the effectiveness value was 85.04%, increasing to 87.72% at a load of 329.75 MW after the overhaul. At a load of 336.98 MW, the effectiveness increased from 85.68% to 87.30% at a load of 346 MW after the overhaul. At a load of 284.33 MW, the effectiveness increased from 85.82% to 87.10% at a load of 282.99 MW after the overhaul. Furthermore, the air leakage value decreased from 13.54% to 11.47% after the overhaul.
Analisis Directional Coupler dengan Inti Polimer Optical Fiber dan Cladding Polymethyl Metacrylate: Simulasi dan Eksperimen Khoiru Insan, Shiva Maulana; Yulianti, Ian; Dharma Putra, Ngurah Made
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 10, No 2 (2026)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v10i2.71469

Abstract

Analisa Directional Coupler dengan inti Polimer Optical Fiber Dan Cladding Polymethyl Metacrylate melalui simulasi dan eksperimen. Proses simulasi melalui penentuan parameter fisis seperti indeks bias core dan cladding,  cahaya (merah 550 nm), geometri (cladding panel persegi berdimensi 0.2×2×4 cm, dan core 2 silinder identik berdiameter 0.1 cm sejajar membujur di tengah cladding), material (core menggunakan POF  dan Cladding PMMA), diakhiri analisa hasil. Eksperimen melalui Proses fabrikasi dari persiapan bahan, pengupasan POF, dan pemotongan PMMA menjadi dimensi 0.2×2×(2/3/4) cm (variasi panjang), digali lubang mambujur berdimensi 0.2×0.1 cm  di tengah untuk meletakan inti POF. Karakterisasi menggunakan led (merah 550 nm) sebagai light transmitter, photo transistor sebagai transducer, dan multimeter untuk pengukuran. Proses simulasi menghasilkan citra propagsi cahaya merah dalam directional coupler, dan eksperimen mendapatkan nilai coupling factor dari directional coupler. Melalui penelitian ini diketahui citra pola perambatan , titik-titik cahaya mencapai peak dan low serta potensi interferensi dalam directional coupler berdimensi besar. Juga potensi coupler untuk dirangkai dan difabrikasi menjadi perangkat fotonik sederhana dengan empat kabel yang dapat divariasikan. Kesimpulan penelitian menekankan perlunya penelitian lebih lanjut untuk mendapatkan coupling factor yang sesuai kebutuhan, meningkatkan kemudahan penggunaan dan kualitas coupler dalam aplikasi praktis seperti sistem komunikasi optik dan sensor optik.
Two-Dimensional Resistivity Structure and Deep Aquifer Characterization in the Haruman Volcanic Area, West Java, Indonesia: An Audio Magnetotelluric Investigation Harja, Asep
JIIF (Jurnal Ilmu dan Inovasi Fisika) Vol 10, No 2 (2026)
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jiif.v10i2.72186

Abstract

Groundwater availability in volcanic terrains is strongly controlled by lithological heterogeneity, structural discontinuities, and the hydraulic characteristics of volcanic deposits. The western slope of Mount Haruman, located within the southern recharge area of the Bandung–Soreang Groundwater Basin, represents an important groundwater catchment in West Java, Indonesia. Previous hydrogeophysical investigations using DC resistivity successfully identified shallow unconfined aquifers at depths less than 40 m; however, the geometry and continuity of deeper groundwater systems remain poorly understood. This study employs the Audio Magnetotelluric (AMT) method to delineate the distribution of deep aquifers beneath the Haruman volcanic complex. Six AMT stations were acquired using a Phoenix MTU-5A system. Time-series data were processed through robust remote-reference techniques, transformed into the frequency domain, and inverted using one-dimensional Occam inversion and two-dimensional inversion implemented in WinGLink software. The resulting resistivity models reveal significant lateral and vertical variations associated with volcanic lithological sequences. Low- to moderate-resistivity zones are interpreted as permeable volcanic tuffs and fractured volcanic rocks saturated by groundwater, whereas high-resistivity bodies correspond to compact lava flows and volcanic breccias acting as aquifuges. The interpreted deep aquifer system extends considerably deeper than previously reported shallow groundwater systems, indicating multiple groundwater-bearing horizons within the volcanic sequence. These findings demonstrate that AMT provides an effective approach for imaging deep groundwater systems in complex volcanic environments and contributes valuable information for sustainable groundwater exploration and conservation within the Bandung Groundwater Basin.

Page 20 of 20 | Total Record : 197

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