cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Indonesian Physical Review
Contact Email
ipr.journal@unram.ac.id
Phone
-
Journal Mail Official
lilyangraini@unram.ac.id
Editorial Address
-
Location
Kota mataram,
Nusa tenggara barat
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.
Arjuna Subject : -
Articles 254 Documents
 22   23   24   25   26 
AFTERSHOCK CHARACTERISTICS OF THE 2018 PALU EARTHQUAKE: IMPLICATIONS FOR SUPERSHEAR RUPTURE SEGMENT Muzli Muzli; Karen H Lythgoe; Rayhan Irfan Hielmy; Rahmat Triyono; Shengji Wei
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.v9i2.666

Abstract

A temporary nodal array was deployed shortly after the Mw 7.5 Palu earthquake in September 2018 to record the aftershocks. Here, we present high-resolution aftershock locations and moment tensors, obtained from the temporary array combined with permanent broadband stations. The results are used to define the fault geometry and seismogenic depth. We find that there are very few aftershocks along a long, straight section of the Palu-Koro fault, which ruptured at supershear speed. Aftershocks tend to cluster north and south of this straight section. Secondary strike-slip faults to the south and east of the main fault were triggered. Additionally, we record an earthquake swarm occurring in the Adang volcanic zone, which began approximately 1 month after the mainshock. Given the smaller number and lower magnitude of aftershocks, we suggest that supershear ruptures pose a lower seismic hazard than corresponding subshear earthquakes. However, the strong shaking from a supershear rupture may pose other hazards, such as disastrous liquefaction. Lastly, we suggest that the ability to deploy short-period nodal arrays rapidly makes them a powerful tool for aftershock studies.
SENSITIVITY OF THE PARAMETRIZED POST NEWTONIAN PARAMETER γPPN TO COSMOLOGICAL MODELS IN STRONG GRAVITATIONAL LENSING Yasmin Mufidanisa; Agustina Widiyani; Azrul Sulaiman Karim Pohan; Ikah Ning Prasetiowati Permanasari; Annisa Novia Indra Putri
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.v9i2.680

Abstract

The parametrized post-Newtonian (PPN) parameter γ measures spacetime curvature per unit gravitational potential, with general relativity (GR) predicting γ = 1 exactly. Strong gravitational lensing at galactic scales offers a cosmological-scale avenue for estimating γ beyond solar system experiments; however, such estimates depend sensitively on angular diameter distances, which in turn depend on the assumed cosmological model. We perform a controlled sensitivity analysis using 40 Sloan Lens ACS (SLACS) strong lensing systems with catalogue SIE Einstein masses MEin fixed under a fiducial ΛCDM cosmology, while varying the background model across ΛCDM, wCDM, Dynamical Dark Energy (DDE), and Early Dark Energy (EDE), all adopting Planck 2018 parameters. Angular diameter distances are computed by numerically integrating the model-specific expansion function E(z), so that any variation in recovered γPPN reflects cosmological distance geometry rather than a gravitational signal. ΛCDM, wCDM, and DDE yield effectively degenerate estimates: mean γ ≈ 1.08 ± 0.020, with inter-model spread of only ~0.5–0.7%. EDE yields a systematically lower mean γ = 0.903 ± 0.019, approximately 16.3% below ΛCDM and below the GR prediction of unity. This shift arises because EDE elevates H(z) near matter-radiation equality (z ~ 3000), compressing angular diameter distances by ~10% relative to ΛCDM; since the γ estimator scales as DL × DS / DLS, this compression propagates into a downward shift in recovered γ. The total inter-model range of ~17% substantially exceeds statistical uncertainties in targeted lensing studies, establishing cosmological model selection as a leading systematic in lensing-based γ measurements. EDE in particular introduces a distinctive geometric signature not captured by late-time dark energy parameterizations. Because MEin is fixed under ΛCDM, these findings should not be interpreted as evidence for or against GR, but as a geometric sensitivity analysis within a specific set of modeling assumptions.
MICROWAVE-ASSISTED GREEN SYNTHESIS OF CARBON DOTS DERIVED FROM MELON PEEL WASTE AS AN ECO-FRIENDLY FLUORESCENT SENSOR FOR Fe³⁺ CONTAMINATION Rahmat Firman Septiyanto; Azfa Restu Putra; Yudi Guntara
Indonesian Physical Review Vol. 9 No. 3 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i3.594

Abstract

This research successfully demonstrates the valorization of melon peel waste into fluorescent carbon dots (CDs) using a straightforward microwave-assisted synthesis method. The synthesized CDs were comprehensively characterized, revealing optimal optical properties for sensing applications. Ultraviolet-visible spectroscopy revealed characteristic absorption peaks at 260 nm and 305 nm, corresponding to the carbon core and surface functional groups, respectively. Furthermore, photoluminescence spectroscopy under 245 nm excitation showed a strong blue emission peak at 453 nm. The practical utility of these nanoparticles was confirmed through their application as a fluorescent sensor for Fe³⁺ ions. The interaction resulted in significant fluorescence quenching and a distinct blue shift of the emission peak to 448 nm, indicating high sensitivity and a strong quenching response, leading to a ~67% decrease in emission intensity. These findings confirm that melon peel-derived CDs are a promising, eco-friendly material for developing effective probes for detecting heavy metals in environmental monitoring.
PETROGRAPHIC CHARACTERIZATION OF BASALTIC ROCKS FROM THE BREUEH VOLCANIC FORMATION, BREUEH ISLAND, INDONESIA Akmal Muhni; Alfi Syahrin; Lia Fitria Rahmatillah; Dewi Sartika; Dina Gunarsih; Amsir Amsir; Dian Darisma
Indonesian Physical Review Vol. 9 No. 3 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i3.644

Abstract

The Breueh Volcanic Formation on Breueh Island, Aceh Besar District, is part of the outer arc volcanic zone related to subduction between the Indo-Australian and Eurasian plates. In addition, the volcanic rocks exposed on Breueh Island provide important geological information for understanding the volcanic history, tectonic processes, and magmatic evolution in the outer arc region of Aceh.  This study aims to determine the rock classification using optical petrography, and to evaluate its possible relationship to the regional tectonic setting. Petrographic analysis was performed on three basaltic rock samples collected from outcrops in the east–southeast area of the formation. Thin sections were examined under a polarizing microscope at Geological Engineering Laboratory Syiah Kuala University, and modal mineral percentages were quantified using the point-counting method with JMicroVision software. The analyzed rocks display massive to amygdaloidal textures, with amygdales filled by zeolite and celadonite. Petrographic observations show that the rocks are dominated by plagioclase (40.17–43%), pyroxene (3.58–20.17%), and opaque minerals (1–2.92%) as major constituents, with minor alkali feldspar (<6.5%), minor quartz (<2.33%), and olivine (~0.5%). Based on the IUGS/Streckeisen classification, all samples are classified as basalt. The occurrence of zeolite and celadonite indicates low-temperature hydrothermal alteration. The dominance of mafic minerals is consistent with basaltic magma typical of subduction-related volcanic settings. Overall, the petrographic characteristics suggest that the basaltic rocks are consistent with magma generated in a subduction-related outer arc volcanic environment.
Analisis Perbandingan Temporal Convolutional Network dan Long Short-Term Memory untuk Pemeliharaan Prediktif Catu Daya Automatic Weather Station Marzuki Sinambela; Rifqi Daffa Ul haq; Dibyo Susanto; Agustina Rachmawardani
Indonesian Physical Review Vol. 9 No. 3 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i3.544

Abstract

Reliable power supply units are essential for Automatic Weather Stations (AWS) to maintain continuous data collection. However, traditional maintenance schedules often fail to prevent sudden equipment downtime. While machine learning can enable predictive maintenance, standard standalone models typically struggle to capture both immediate short-term anomalies and slow, long-term degradation. To address this gap, this study aims to evaluate and propose a hybrid Temporal Convolutional Network (TCN) and Long Short-Term Memory (LSTM) architecture specifically designed for AWS power supply forecasting. Using empirical time-series data, we monitored five operational parameters at 10-minute intervals from September 2023 to November 2024. Correlation analysis established battery temperature as a primary health indicator due to its strong inverse relationship with voltage (r = –0.87). Comparative evaluations demonstrated that while individual TCN and LSTM models exhibited architectural trade-offs, the proposed hybrid TCN-LSTM model achieved the highest predictive accuracy (R² = 0.9497; MAPE = 0.05%). The findings confirm that integrating these networks effectively balances rapid anomaly detection with stable long-term trend forecasting. Practically, this hybrid model can be integrated into AWS telemetry systems as a robust diagnostic tool, providing automated early warnings to prevent critical power failures.
FIRST-PRINCIPLES STUDY OF Sn-DOPING EFFECTS ON THE ELECTRONIC AND OPTICAL PROPERTIES OF ZnO Rini Anggraini Pakpahan; Suryanti Suraja Pulungan
Indonesian Physical Review Vol. 9 No. 3 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i3.618

Abstract

In this work, the effects of substitutional Sn doping on the electronic and optical properties of ZnO were investigated using first-principles Density Functional Theory (DFT) calculations within the Generalized Gradient Approximation of Perdew–Burke–Ernzerhof (GGA-PBE). A 2 × 2 × 2 wurtzite ZnO supercell was employed, where Sn atoms substituted Zn atoms at concentrations of 6.25, 12.50, and 18.75% on Zn sites. Structural optimization was first carried out to obtain the relaxed atomic configurations before evaluating the electronic and optical responses of the doped systems. The calculated PBE band gap decreases from 0.82 eV for pure ZnO to 0.71, 0.55, and 0.38 eV, respectively, indicating a significant modification of the electronic structure after doping. Density of states (DOS) analysis indicates that Sn-derived electronic states emerge near the conduction-band region, leading to modifications of the band-edge structure and enhanced electronic transitions. Optical calculations further reveal increased low-energy absorption and a shift of the optical response toward the visible-light region after Sn incorporation, suggesting improved light-harvesting capability. Although the absolute band-gap values are underestimated compared with experiment, the observed trend provides meaningful insight into the role of Sn concentration in tuning ZnO properties. These results demonstrate that substitutional Sn doping is an effective strategy for tuning the electronic and optical properties of ZnO and improving its potential for visible-light optoelectronic and photovoltaic applications.
DEVELOPMENT OF A SIMPLE LABORATORY-SCALE LANDSLIDE SIMULATION SYSTEM USING A SHAKING TABLE AND ARTIFICIAL RAINFALL Elfi Yuliza; Muhammad Khafid Fauzi; Riska Ekawita; Refrizon Refrizon
Indonesian Physical Review Vol. 9 No. 3 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i3.636

Abstract

A landslide mitigation system is essential to reduce the potential risks of disasters. Historical records of both localized and widespread landslide events indicate that the development of sensor-based early warning systems is an effective approach. The design of such systems requires an understanding of landslide characteristics and sensor response to physical changes in soil. Therefore, this study developed a laboratory-scale landslide simulation model to investigate landslide behaviors. The model incorporates two primary triggering factors, namely vibration and A landslide mitigation system is essential to reduce the potential risks of disasters. Historical records of both localized and widespread landslide events indicate that the development of sensor-based early warning systems is an effective mitigation approach. The design of such systems requires an understanding of landslide characteristics and sensor responses to physical changes in soil. Therefore, this study developed a simple laboratory-scale landslide simulation system integrating a shaking table, an artificial rainfall, and a sensor system. The novelty of this work lies in integrating two different triggering factors, vibration through a shaking table and rainfall, using artificial rainfall. Two different materials, laterite and soil, were used to obtain ground movement characteristics. The results indicate that each material responded differently to the applied triggering factors. Laterite soil with clayey characteristics became soft and exhibited plasticity behavior under wet conditions and hardened under dry conditions. Consequently, vibration-induced movement in zones with weak soil bonding, while the addition of water primarily caused fluid flow associated with rainfall. In contrast, for sand samples, both vibration and artificial rainfall reduced pore size and enhanced soil bonding. However, an optimal pore size was observed, as excessive saturation led to fractures and collapse. Excess water also promotes fluid flow and liquefaction. Furthermore, the sensor system effectively detected and responded to the observed changes during the experimental procedure.
DESIGN OF A PORTABLE COLORIMETRIC SYSTEM BASED ON THE COLOR SENSOR TCS3200 (GY-31) FOR DETECTING THE CONCENTRATION OF METHYLENE BLUE IN SOLUTIONS Lalu Teguh Permana; Muhandis Siddiq; Husin Alatas; Erus Rustami
Indonesian Physical Review Vol. 9 No. 3 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i3.648

Abstract

A low-cost colorimetric system based on an Arduino microcontroller and a TCS3200 (GY-31) RGB sensor was investigated to estimate the concentration of methylene blue (MB) in aqueous solutions. Measurements were conducted using a transmission-mode optical configuration, in which a white-light source passes through a cuvette with a fixed optical path length, and the transmitted light is detected as a frequency output. The frequency signal was used as a relative indicator of light intensity, and absorbance was calculated from the ratio of transmitted to reference frequency. Calibration was performed over a concentration range of 0.1–20 ppm, and the results were compared with those obtained using a UV–Vis spectrophotometer. The system showed an approximately linear response to MB concentration with a coefficient of determination (R²) of 0.9807. An average relative error of 18% was observed in the validation results, with limits of detection (LOD) and quantification (LOQ) of 3.95 ppm and 13.17 ppm, respectively. The relatively high LOQ is primarily due to the broadband RGB detection characteristics and signal variability of the low-cost sensor system, which limit sensitivity at low concentrations. Repeated measurements yielded a coefficient of variation below 3%, indicating acceptable short-term repeatability. These results demonstrate the feasibility of the proposed low-cost system for preliminary screening or indicative assessment of MB concentration, particularly at levels near regulatory limits. Further improvements in optical stabilization, spectral selectivity, and calibration procedures are required to enhance sensitivity and accuracy for broader analytical applications.
OPTICAL, CORROSION, AND ELECTROCHEMICAL ANALYSIS OF GRAPHITE–TURMERIC EXTRACT FORMULATIONS FOR ZINC IN 3.5 wt.% NaCl SOLUTION Romi Fadli Syahputra; Neneng Fitrya; Delovita Ginting; Fauzan Fahturrahman; Salsabila Marcela; Aas Wiranda; Salsabillah Ratih Putri; Putri Fitri Handayani; Bunga Meyzia; Zulkarnain Zulkarnain
Indonesian Physical Review Vol. 9 No. 3 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i3.649

Abstract

The development of environmentally friendly corrosion protection materials is important for protecting metallic components exposed to saline environments. In this work, graphite–curcuminoids hybrid formulations based on curcuminoids extracted from Curcuma longa and graphite (IGC) were evaluated for corrosion protection of zinc in 3.5 wt.% NaCl solution. Optical properties were characterized by UV–Vis spectroscopy, while corrosion behavior was assessed using linear sweep voltammetry and Tafel polarization analysis. The incorporation of graphite modified the absorption characteristics of curcuminoids and slightly reduced the optical band gap from 2.65 eV (curcuminoids) and 2.85 eV (graphite) to 2.59–2.62 eV for the hybrid formulations. Among the investigated compositions, IGC1 exhibited the best performance, reducing the corrosion rate from 0.1175 to 0.0408 mm/y and achieving an inhibition efficiency of 65.3%. In contrast, IGC2 showed a higher corrosion rate of 0.1863 mm/y, indicating that excessive graphite loading adversely affected the protective performance. The results indicate that the corrosion behavior of graphite–curcuminoids hybrid formulations is highly dependent on composition. These findings demonstrate the potential of graphite–curcuminoids hybrids as environmentally friendly corrosion inhibitors for zinc in saline water media.
THREE-DIMENSIONAL RESISTIVITY MODELING OF THE HYDROTHERMAL FLOW SYSTEM IN TANJUNG SAKTI PUMI REGION, INDONESIA Marven Saputra; Suhendra Suhendra; Refrizon Refrizon; Florenzy Ernica 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.v9i2.653

Abstract

Tanjung Sakti Pumi Subdistrict, Lahat Regency, South Sumatra Province, is characterized by surface geothermal manifestations, particularly hot springs associated with a hydrothermal system. This study aims to evaluate hydrothermal potential and subsurface fluid-flow patterns by analyzing resistivity variations using the Schlumberger Vertical Electrical Sounding (VES) method. An integrated interpretation combining one-dimensional (1D), two-dimensional (2D), and three-dimensional (3D) resistivity modeling was applied to improve subsurface characterization. The results reveal low-resistivity zones (< 6 Ωm), interpreted as clay-rich hydrothermal alteration layers (clay cap), while deeper, moderate-to-high-resistivity zones are associated with potential geothermal reservoirs. This multi-dimensional approach enhances the delineation of lateral and vertical continuity of conductive zones, providing a more comprehensive understanding of structurally controlled hydrothermal systems in the study area. The findings demonstrate the effectiveness of integrated resistivity modeling for preliminary geothermal exploration and offer important insights into subsurface geothermal structures in Tanjung Sakti Pumi.

Page 25 of 26 | Total Record : 254

 22   23   24   25   26 

Filter by Year

2018 2026


Reset
Filter By Issues
All Issue Vol. 9 No. 3 (2026) Vol. 9 No. 2 (2026) Vol. 9 No. 1 (2026) Vol. 8 No. 3 (2025) Vol. 8 No. 2 (2025) Vol. 8 No. 1 (2025) Vol. 7 No. 3 (2024) Vol. 7 No. 2 (2024) Vol. 7 No. 1 (2024) Vol. 6 No. 3 (2023) Vol. 6 No. 2 (2023) Vol. 6 No. 1 (2023) Vol. 5 No. 3 (2022) Vol. 5 No. 2 (2022) Vol. 5 No. 1 (2022) Vol. 4 No. 3 (2021) Vol. 4 No. 2 (2021) Vol. 4 No. 1 (2021) Vol. 3 No. 3 (2020) Vol. 3 No. 2 (2020) Vol. 3 No. 1 (2020) Vol. 2 No. 3 (2019) Vol. 2 No. 2 (2019) Vol 2, No 1 (2019) Vol. 1 No. 1 (2018) More Issue