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INDONESIA
Indonesian Physical Review
Published by Universitas Mataram
ISSN : 26151278     EISSN : 26147904     DOI : -
Core Subject : Science, Education,
Education Physics
Indonesian Physical Review is a peer review journal which is managed and published by Physics Departement, Faculty of Mathematics and Natural Sciences, Universitas Mataram. This journal is published periodically three times a year, in January, May and September. IPR is Open Accsess for all readers and includes research developments in physics both experimentally and analytically. Focus and scope include Theoritical Physics, Computation, Material sciences, Instrumentation, Biophysics, Geophysics, and Optics.
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Articles 6 Documents
 1 
Search results for , issue "Vol. 9 No. 2 (2026)" : 6 Documents clear
DESIGN AND FIELD VALIDATION OF A PHOTOVOLTAIC-POWERED WATER FLOW MONITORING SYSTEM FOR PUBLIC UTILITIES Aruan, Nenni Mona; Wardhani, Primasari Cahya; Cundaningsih, Nurvita; Pujianti, Autia Nurul; Rahmadani, Imelda Putri Alyah
Indonesian Physical Review Vol. 9 No. 2 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i2.562

Abstract

The integration of renewable energy sources with sensor-based instrumentation offers a transformative approach to sustainable infrastructure, especially in water utility management. This study presents the development of a solar-powered autonomous water flow monitoring system deployed at the Lamongan municipal drinking-water utility (Perusahaan Daerah Air Minum; PDAM) in Indonesia. The system employs a 250 Wp photovoltaic (PV) module, coupled with an 18 V battery unit and a 10 A solar charge controller, enabling fully off-grid operation. A DC–DC buck converter maintains stable 50 V ± 2% regulation, supplying power to a calibrated flow sensor and a digital data acquisition unit, with an average power consumption of 0.5 W. Together, these components form a compact, self-sustaining instrumentation platform for real-time, continuous water flow monitoring. From the perspective of physics and instrumentation engineering, this research addresses the photovoltaic energy conversion process, electrical stability in DC power distribution, and flow signal conditioning under fluctuating solar irradiance. The flow sensor interface achieves an average accuracy of ±2% (2.08% with a coefficient of determination of 0.9984) over 1 to 20 Ls-1, supported by volumetric measurements. Long-term field operations over three months confirm stable system performance, with continuous data acquisition and negligible measurement drift, even under partial shading and low irradiance conditions. Power system monitoring indicates reliable energy autonomy with minimal interruption to sensor operation. The results demonstrate that the proposed system achieves accurate, stable, and energy-efficient real-time flow measurement without reliance on grid power. This study provides a validated instrumentation framework for renewable energy-powered sensing systems, enabling scalable deployment in smart water networks and other resource-monitoring applications.
DEEP INTRASLAB DEFORMATION OFFSHORE NORTHERN JAVA REVEALED BY TIME-DOMAIN MOMENT TENSOR (TDMT) INVERSION Fahmi, Muhammad Nurul; Indrawati, Yuni; Realita, Arie; Madlazim, Madlazim
Indonesian Physical Review Vol. 9 No. 2 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i2.564

Abstract

This study investigates deep-focus intraslab deformation offshore Northern Java by analyzing two recent major earthquakes: 6 July 2020 (  6.67) and 14 April 2023 (  6.96), occurring at centroid depths of ~500–600 km. The objective is to constrain the source mechanisms and infer the prevailing deformation regime within the subducting Indo-Australian slab. We perform time-domain moment tensor (TDMT) inversion of broadband waveforms (GE/GEOFON network) using MTTime, with standard preprocessing (instrument correction and band-pass filtering) and Green’s functions computed from the 1-D ak135 velocity model. Centroid depth is refined via a grid search that maximizes waveform variance reduction (VR). The preferred solutions show good waveform agreement (VR = 82.0% for the 2020 event and 71.6% for the 2023 event) and are consistent with Global CMT solutions (Kagan angles = 7.04° and 6.31°, respectively). Both earthquakes exhibit oblique normal faulting with a persistent dextral strike-slip component, indicating a dominantly extensional stress regime at depth, likely driven by slab pull/gravitational sinking, while the consistent trench-parallel shear suggests more complex internal slab deformation. These results provide quantitative constraints on deep intraslab kinematics beneath Java and motivate expanded event sampling for a more robust regional interpretation.
THE EFFECT OF DEPOSITION TEMPERATURE ON Cu2ZnSnS4 (CZTS) THIN FILMS GROWN BY DC MAGNETRON SPUTTERING Fianti, Fianti; Mulia, Shila Artha; Sari, Nabila Rizkina; Firdhosiyah, Siti; Astuti, Budi; Marwoto, Putut; Kim, Kyoo Ho; Amal, Muhammad Ikhlasul; Muslih, Ersan Yudhapratama
Indonesian Physical Review Vol. 9 No. 2 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i2.616

Abstract

Cu₂ZnSnS₄ thin films were successfully deposited on soda lime glass substrates using the DC Magnetron Sputtering method at a plasma power of 42 W, an argon gas pressure of 500 mTorr, and deposition temperatures ranging from 27 °C to 400 °C for 7 hours, using a Cu₂ZnSnS₄ target with 99% purity. The effect of varying temperatures was characterized by using X-ray Diffraction (XRD) to determine the film structure, Scanning Electron Microscopy with Energy Dispersive X-ray Spectroscopy (SEM-EDX) to analyze morphology and composition, and UV-Vis-NIR spectrophotometry to evaluate optical properties. Film composition showed non-stoichiometric characteristics, with elemental ranges of Cu (20.66–32.81) %, Zn (14.08–25.67) %, Sn (21.87–37.05) %, and S (25.42–31.22) %. All samples exhibited a Cu/(Zn+Sn) ratio of less than 1, indicating Cu-poor compositions typical of p-type semiconductors. XRD analysis revealed that the formation of the Cu₂ZnSnS₄ phase began at a deposition temperature of 100 °C, while stable kesterite Cu₂ZnSnS₄ crystals were obtained at 400 °C, corresponding to the (112) crystal plane. The absorption coefficients and band gap energies ranged from 10⁴ to 10⁵ cm ¹ and from 1.34 to 2.175 eV, respectively, confirming the suitability of the films for solar cell applications. SEM observations indicated that higher deposition temperature promoted more successful grain growth. Overall, higher deposition temperatures yield better Cu₂ZnSnS₄ thin films.
USE OF ELECTRICAL RESISTIVITY FOR MAPPING THE LEACHATE DISTRIBUTION IN BLANG BINTANG SANITARY LANDFILL, ACEH DISTRICT Masrurah, Zakia; Muhni, Akmal; Yanis, Muhammad; Zainal, Muzakir
Indonesian Physical Review Vol. 9 No. 2 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i2.549

Abstract

An increase in waste in urban areas, especially in landfills, can produce leachate that has the potential to pollute the environment. The Blang Bintang waste treatment facility, which uses a sanitary landfill system, is in a hilly area with complex geology dominated by andesite volcanic rocks. This study aims to identify and estimate the level of leachate contamination at the Blang Bintang landfill in Aceh using Electrical Resistivity Tomography (ERT).  Four ERT profiles were measured in the leachate treatment facility area, spanning 180 meters in length and up to 30 meters in depth. ERT data analysis using the Res2dinv software produced an accurate model with an RMS error of 10%-20%. The modeling results indicate the presence of conductive zones (5–150 Ohm.m) near the surface layers of profiles 1 and 2, suggesting leachate contamination. The electrical resistivity tomography (ERT) model further demonstrates leachate accumulation in the subsurface, which poses a potential risk to groundwater quality. In Profile 3, conductive zones (5–200 Ohm.m) are observed along the underground leachate pipeline. For Profile 4, conductive layers (15–250 Ohm.m) are attributed to seepage from the first leachate pond, indicating substantial contamination. This study provides landfill managers with valuable data on subsurface contamination that cannot be identified from surface observations. It also advances geophysical methods for environmental impact assessments.
Studi Ekman Mass Transport dan Ekman Pumping Velocity pada Kawasan Perairan Selatan Jawa – Nusa Tenggara Nindy Saitama L. Gaol; I Wayan Gede Astawa Karang; I Dewa Nyoman Nurweda Putra
Indonesian Physical Review Vol. 9 No. 2 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i2.565

Abstract

The waters south of Java to Nusa Tenggara are a critical upwelling region heavily influenced by monsoon dynamics. The interactions drive oceanographic variability, specifically Ekman Mass Transport (EMT) and Ekman Pumping Velocity (EPV), which regulate primary productivity. While previous studies have examined these dynamics, most have focused on short-term variations. To address this, this study analyzes the variability of EMT and EPV over a 22-year period (2003–2024) and their interaction with El Niño-Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD). EMT and EPV values were calculated using ECMWF wind data, SST, and chlorophyll-a data sourced from MODIS, and climate indices (Niño 3.4 and DMI), which were then analyzed using Pearson correlation. Results show that EMT and EPV peak during the Southeast Monsoon (JJA), reaching approximately 5.16 m²/s and -2.89 × 10⁻⁵ m/s, respectively. Notable anomalies occurred in 2010 and 2016; specifically, the 2010 interaction between La Niña and a negative IOD significantly suppressed upwelling. Correlation analysis reveals that SST is predominantly influenced by EPV, while chlorophyll a concentration is more closely linked to EMT. Although both ENSO and IOD modulate these dynamics, the IOD exerts a stronger influence due to the region’s proximity to the Indian Ocean. These findings provide critical insights into the oceanographic drivers of regional productivity, supporting sustainable fisheries management.
INTEGRATED SATELLITE IMAGERY AND GEOPHYSICAL METHODS IDENTIFY LANDSLIDE SUSCEPTIBILITY ZONATION IN TABBINJAI VILLAGE, SOUTH SULAWESI Amirin Kusmiran; Minarti Minarti; Alvia Auliya; Wahda Nur Aulia; Hasmia Hasmia; Nisrah Azizah; Arif Wijaya; Ramadhan Priadi
Indonesian Physical Review Vol. 9 No. 2 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i2.632

Abstract

Tabbinjai Village is susceptible to landslides due to high rainfall, steep topography, and human activities. This study aims to determine the zone of landslide vulnerability using geophysical data and satellite imagery to generate a level of landslide vulnerability map in Tabbinjai Village. The AHP (Analytical Hierarchy Process) method is used to determine the weight composition of satellite imagery data, and Seismic vulnerability and slip plane identification are geophysical methods that include the HVSR (horizontal-to-vertical spectral ratio) method and the Wenner-Schlumberger configuration, respectively. Based on the AHP method, landslide susceptibility is classified into low (60.67%), moderate (37.89%), and high (1.44%) susceptibility zones. These spatial findings are supported by the in situ seismic vulnerability index (Kg) and geoelectrical resistivity profiles, confirming the strong likelihood of slope failure in critical areas. Therefore, integrated satellite imagery and geophysical data provide a reliable reference for regional spatial planning and disaster mitigation strategies.

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