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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 221 Documents
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SEA-LEVEL VARIABILITY IN THE JAVA SEA LINKED TO MONSOON FORCING AND CLIMATE TELECONNECTIONS (2009–2024) Nugraheni, Imma Redha; Lestari, Tri Anggun; Kristianto, Aries; Avrionesti, Avrionesti; Rejeki, Hasti Amrih; Wijaya, Yusuf Jati
Indonesian Physical Review Vol. 8 No. 3 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i3.571

Abstract

The Java Sea is a shallow, strait-connected shelf where seasonal monsoon forcing and climate modes can strongly modulate sea level, yet their sectoral expressions remain under-resolved. Altimetric observations from 2009–2024 (DUACS) are analyzed and validated against a network of Indonesian tide gauges and partition the basin into western (W-JS), central (C-JS), and eastern (E-JS) sectors. After detrending, the seasonal cycle is diagnosed via amplitude and phase metrics and quantifies interannual teleconnections using lead–lag cross-correlations (−12 to +12 months) between sea-level anomaly (SLA) and the Dipole Mode Index (DMI) and Southern Oscillation Index (SOI), with confidence intervals. DUACS reproduces tide-gauge variability with high skill (median correlation ≈ 0.82; RMSE 5–11 cm; small negative biases), supporting its use as a basin proxy. Seasonally, SLA peaks in DJF, weakens in MAM, reaches a pronounced minimum in JJA, and recovers in SON, with marked zonal heterogeneity: E-JS exhibits the strongest annual range (~18 cm) versus W-/C-JS (~12–13 cm). The seasonal phase is non-synchronous (W-JS maxima in May–June; E-JS in December–January), while C-JS behaves as a transition zone. Interannually, IOD impacts are near-synchronous and negative (lag-0, r ~ −0.41 to −0.47 across sectors), whereas ENSO peaks at short positive lags (SOI leads by ~1 month; r ~ 0.45–0.53), implying higher sea level during La Niña and lower during El Niño. These sign-and-lag relationships, combined with tide and surge information, have the potential to inform seasonal outlooks for ports and low-lying coastal areas of Java.
SUBSURFACE SOIL CHARACTERISATION USING VERTICAL ELECTRICAL SOUNDING FOR SUPPORTING INFRASTRUCTURE DEVELOPMENT AT SYIAH KUALA UNIVERSITY Amsir, Amsir; Masrurah, Zakia; Aflah, Nurul; Pramana, Agus Hari; Baramsyah, Haqul
Indonesian Physical Review Vol. 9 No. 1 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i1.529

Abstract

This study characterises the subsurface soil properties in the western sector of Syiah Kuala University, specifically the Kopelma Darussalam area, using Vertical Electrical Sounding (VES) with a Schlumberger configuration. Nine measurement points were deployed to obtain resistivity profiles supporting infrastructure development planning. The results indicate that the surface layer (0–15 m) exhibits high resistivity (12.0–270.2 Ωm), suggesting dry sandy material with high permeability and sufficient bearing capacity. Below 15–30 m, resistivity decreases (1.9–26.5 Ωm), indicating a water-saturated layer potentially functioning as an aquifer, which has implications for soil stability. The deepest layers (>30 m) show low resistivity (<5 Ωm), reflecting low-permeability materials less suitable for heavy construction, though some high-resistivity anomalies suggest dense sandstone formations suitable for foundations. These findings provide preliminary geotechnical zoning insights, aiding developers in selecting appropriate foundation locations, improving construction safety, and ensuring long-term infrastructure stability at University Syiah Kuala.
Optimasi Formulasi Pewarna Alami Vegetasi Rawa untuk DSSC Menggunakan Simplex Lattice Design Azra, Muhammad Rizki; Tamrin, Tamrin; Hower, Haisen
Indonesian Physical Review Vol. 9 No. 1 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i1.528

Abstract

Dye-sensitized solar cells (DSSC) are third-generation photovoltaic devices capable of using natural pigments as photosensitizers. This study aims to optimize the efficiency of DSSC by using formulations of a combination of natural dyes extracted from swamp vegetation: water hyacinth (Eichhornia crassipes), senduduk fruit (Melastoma malabathricum), and primrose willow (Ludwigia peruviana). These dyes, which are rich in chlorophyll, anthocyanins, and carotenoids, respectively, were formulated in different volume combinations using the Simplex Lattice Design (SLD) method. The experimental results show that the mixture of natural dyes can expand the absorption range of visible light wavelengths and enhance the performance of DSSC. The optimal dye combination, consisting of 1.827 mL water hyacinth and 3.173 mL senduduk fruit, yielded an efficiency of 0.050% with a desirability score of 1. This study highlights the potential of swamp vegetation as a sustainable and low-cost alternative for DSSC applications and demonstrates the effective use of statistical modeling to optimize dye formulations.
SYNTHESIS OF NANOHYDROXYAPATITE FROM BUKIT JIMBARAN LIMESTONE Amerta, Gede Arya; Mardana, Ida Bagus Putu; Yasa, Putu
Indonesian Physical Review Vol. 9 No. 1 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i1.548

Abstract

The global demand for biocompatible biomimetic materials drives the development of nanohydroxyapatite (HAp) for biomedical applications. This study aims to synthesize nanohydroxyapatite (Ca₁₀(PO₄)₆(OH)₂) from Bukit Jimbaran limestone, Bali, through a precipitation method. XRF analysis shows that the limestone contains 99.62% CaO, which is the main source of calcium. FTIR results detect the presence of phosphate (PO₄³⁻), carbonate (CO₃²⁻), calcium oxide (CaO), and hydroxyl (OH⁻) groups, confirming the formation of the typical HAp structure. The XRD diffraction pattern showed good agreement with JCPDS 09-0432, with major peaks on the (211), (112), and (300) planes, lattice parameters a = b = 9.45 Å and c = 6.85 Å, an average crystallite size of 8.70 nm, and a crystallinity of 92.88%. SEM-EDX analysis revealed agglomerated particle morphology, with a Ca content of 32.0 wt.% and a P content of 14.0 wt.%. The high crystallinity and very small crystallite size confirm the potential of this synthesized HAp to enhance bioactivity and accelerate bone integration, making Jimbaran limestone HP a strong candidate in the biomedical sector.
CHARACTERIZATION OF GEOTHERMAL POTENTIAL USING 2D MAGNETOTELLURIC INVERSION AT TELAGA TUJUH WARNA, LEBONG REGENCY, BENGKULU PROVINCE, INDONESIA Maesaroh, Rina Maesaroh; Farid, Muchammad; Refrizon, Refrizon; Sumajaya, Erlan; Al Ansory, Andre Rahmat; Naldo, Asrol
Indonesian Physical Review Vol. 8 No. 3 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i3.478

Abstract

The Telaga Tujuh Warna area in Lebong Regency exhibits geothermal manifestations such as hot water, mud craters, and fumaroles. This research aims to characterize the geothermal potential using 2D Magnetotelluric (MT) inversion. Measurements were conducted with the ADU-07e Magnetotelluric device, involving a 16-hour measurement period. Data collection followed the sounding principle with three frequency levels: high (4096 Hz), medium (1024 Hz), and low (128 Hz), spaced approximately 500 meters apart. Analysis confirms the consistency between 1D and 2D resistivity models, generating a resistivity distribution cross-section. Key findings include: (1) a low-resistivity cap layer (20–40 Ω-m) at approximately 1 km depth; (2) a medium-resistivity reservoir (40–160 Ω-m) at depths of 1–2 km; (3) a high-resistivity geothermal resource (>300 Ω-m) at depths of 1–2.5 km; and (4) a zone with very low resistivity values (2–16 Ω-m) at depths less than 1 km, potentially indicating a fumarole emitting hot water vapor and gas through rock fractures. These findings aim to advance geothermal exploration in Lebong Regency and support Indonesia's renewable energy objectives.
INTEGRATED GEOPHYSICAL AND GEOTECHNICAL ANALYSIS TO SUBSURFACE LITHOLOGY OVERVIEW AT ITERA DORMITORY SITE, LAMPUNG, INDONESIA Santoso, Nono Agus; Irwanto, Prastowo Adhi; Syuhada, Syahidus
Indonesian Physical Review Vol. 8 No. 3 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i3.488

Abstract

The Student Dormitory is a gathering place for most new students at ITERA. For disaster mitigation, it is necessary to conduct geophysical and geotechnical surveys. Geophysical and geotechnical surveys are conducted to describe the subsurface lithology. The purpose of this study is to identify the subsurface of the Dormitory building so that it can be determined which buildings have the potential for geological hazards. The methods used are geomagnetic, geoelectric and geotechnical methods. The results obtained are that High and low magnetic anomalies are related to the thickness of the lithology. This is also justified by the results of geoelectric using resistivity cross-sections. The thickness of this lithology is related to the level of building security. TB4 has the highest security based on magnetic and geoelectric data. Meanwhile, TB1 has the lowest security based on subsurface conditions.
ASSESSING CISANTI LAKE SEDIMENTS AS ENVIRONMENTAL QUALITY INDICATORS IN THE UPSTREAM OF THE CITARUM RIVER Fitriani, Dini; Agustine, Eleonora; Hajar Kirana, Kartika; Meliani, Tiara Ayu; Rofifah, Sinthia Anis; Chicilia, Novia; Muhammad, Irfan Handi; Rostika Noviyanti, Atiek; Tamuntuan, Gerald Hendrik
Indonesian Physical Review Vol. 8 No. 3 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i3.490

Abstract

Environmental conditions in aquatic ecosystems could change due to the entry of additional materials, such as heavy metals and magnetic minerals. These materials, referred to as anthropogenic materials, could be derived from human activities. The presence of the materials could affect the magnetic properties and heavy metals content of river water and sediments. We have analyzed magnetic susceptibility and heavy metal concentration in sediments collected from Cisanti Lake. Cisanti Lake is known as “zero kilometers” of the Citarum River. Using the level of heavy metals in sediments, we calculated and evaluated pollution indices in the form of Contamination Factor (CF), Geoaccumulation Index (Igeo), and Pollution Load Index (PLI). The results showed that the magnetic susceptibility of sediments (𝜒𝐿𝐹) was in the range of 317.2 - 2274.9 (× 10-8) m3kg-1, inferring the dominance of ferrimagnetic minerals in sediments. Based on bivariate analysis of 𝜒𝐿𝐹 and the calculated frequency-dependent magnetic susceptibility or cFD (%), domain states of magnetic minerals are clustered at stable single domain (SSD)/multidomain (MD). Pollution indices of CF and Igeo showed that all sample points were contaminated by Cu at a considerable level.  Moderate to significant contamination occurred in the studied area according to the PLI analysis. The positive strong correlation between 𝜒𝐿𝐹 and PLI suggests that magnetic susceptibility serves as a proxy indicator of contamination. 
INTEGRATING HIGH-RESOLUTION GRAVITY GRADIENTS AND 3D INVERSION MODELING TO DELINEATE MINERAL RESOURCES IN THE LEWA DISTRICT, EAST SUMBA, INDONESIA Raja, Aprianus; Tanesib, Jehunias; Lapono, Laura A. S.; Lewerissa, Richard
Indonesian Physical Review Vol. 8 No. 3 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i3.501

Abstract

Research in Lewa District, East Sumba Regency, Indonesia, aimed to identify mineral potential and clarify subsurface geological structures through gravity gradient analysis and 3D inversion modeling. This approach addresses the limitations of field gravity data in the study area. The gravity gradient method was chosen to delineate geological structure boundaries (such as formation contacts and faults) compared to conventional gravity methods and for processing global satellite data (GGMplus and EGM2008 derivatives of ERTM 2160) with limited measured data. Gravity gradient analysis, including vertical, horizontal gradient, and tilt angle, was applied to Complete Bouguer Anomaly data using 2D Fourier transformation. Gravity field correction in Lewa showed positive anomalies from volcanic basement rocks. The gradient analysis sharpened boundaries of anomalies linked to geological structures. Zero contours of vertical gradient and tilt angle defined structural boundaries, while peaks of horizontal gradient and tilt angle indicated metallic mineral sources. 3D gravity inversion modeling (density 2.22–2.97 g/cm³) showed rock intrusions at 215 meters depth, interpreted as key to mineralization formation. The 2D sections (A-A', B-B', C-C') contain Masu Formation volcanic rocks, with fault zones filled by Waikabubak Formation sedimentary rocks and silicified rocks from magma intrusion alteration. Fault systems were identified through vertical gradient extremes, representing contact formation. Highly positive contour values on the tilt angle map confirm the influence of the volcanic basement rock. Metal mineralization is closely related to tectonic activity and alteration from massive igneous intrusion. The integration of gravity gradient analysis and 3D inversion modeling has proven to be effective in mapping geological structures and identifying mineral prospects using limited data. These findings provide insights into the subsurface geology of Lewa and provide a basis for further mineral exploration in East Sumba.
TWISTED INTRAMOLECULAR CHARGE TRANSFER IN STYRYLPENTAFLUOROPHENYL AMINOPYRENE: A DFT AND TDDFT STUDY OF SOLVENT EFFECTS AND MOLECULAR TWISTING DYNAMICS Maftuhin, Wafa; Walter, Michael
Indonesian Physical Review Vol. 9 No. 1 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i1.543

Abstract

Twisted intramolecular charge transfer is a key feature of donor–acceptor chromophores, significantly influencing their photophysical behavior. These processes are also central to the design of sensing and optoelectronic materials. In this study, we examine styrylpentafluorophenyl aminopyrene, which links a rigid pentafluorostyryl acceptor to a flexible N, N-dimethylaniline donor. Using density functional theory (DFT) and time-dependent DFT, we optimized ground and excited-state structures, mapped torsional energy surfaces, and explored solvent effects within a dielectric continuum model. The calculations indicate that the pentafluorostyryl unit remains locked in conjugation, while donor twisting through the dimethylaniline group drives the formation of a twisted intramolecular charge transfer (TICT) state. This mechanism reproduces observed solvent-independent absorption and solvent-sensitive fluorescence shifts of about 0.5 eV in polar media. The results place styrylpentafluorophenyl aminopyrene among donor-controlled twisted intramolecular charge transfer systems, while also highlighting how the structural asymmetry of a rigid acceptor and a flexible donor creates a single relaxation pathway. Such design principles can help guide the tuning of charge-transfer emission in functional dyes and related optoelectronic applications. In contrast to previously studied systems, styrylpentafluorophenyl aminopyrene reveals a distinctly donor-controlled mechanism reinforced by a rigid acceptor, establishing a new theoretical basis for predicting twisted intramolecular charge transfer behavior in asymmetric donor–acceptor chromophores.
RADIOLOGICAL CHARACTERISTICS OF 3D-PRINTED PETG AND TPU AT DIFFERENT INFILL PERCENTAGES FOR BREAST CANCER RADIOTHERAPY BOLUS Abrar, Luthfia Aqila; Sri Herwiningsih; Johan Andoyo Effendi Noor; Faisal Ahlan Rizaldi; Fatimah Kunti Hentihu
Indonesian Physical Review Vol. 9 No. 1 (2026)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v9i1.531

Abstract

Skin-sparing effect causes the radiation dose at a certain depth to be higher than at the skin surface. A tissue-equivalent material namely bolus is required to increase the radiation dose to the skin surface. Conventional bolus is widely used, it poorly conforms to irregular surface, leading to air gaps and compromising dose distribution accuracy. The three-dimensional (3D) printing technology enables the fabrication of 3D-printed boluses to minimize the air gap in conventional bolus applications. In addition, 3D printing is allowed to modify its infill percentage and infill patterns, minimizing both printing time and material usage but resulting in different radiological and dosimetric characteristics. Therefore, it is crucial to evaluate the radiological characteristics of 3D-printed bolus before its application in breast cancer radiotherapy. In this study, the radiological characteristics of 3D-printed Polyethylene Terephthalate Glycol (PETG) and Thermoplastic Polyurethane (TPU) boluses at different infill percentages have been evaluated. This research utilized eight plate-shaped 3D-printed bolus samples with dimensions of 12 cm × 12 cm × 1 cm, at the infill percentages of 20%, 40%, 60%, and 80%. Each bolus sample was scanned using a CT-Simulator to determine its Hounsfield Unit (HU) values and linear attenuation coefficients. The obtained HU values were compared with the HU values of human tissues. The results indicate that both 3D-printed PETG and TPU boluses demonstrate similar equivalency to adipose tissue. Consequently, based on radiological evaluation, PETG and TPU materials are suitable for use in fabricating 3D-printed bolus for breast cancer radiotherapy application.  

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