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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 7 Documents
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Search results for , issue "Vol. 5 No. 2 (2022)" : 7 Documents clear
IDENTIFICATION OF ROCK CHARACTERISTICS USING XRF, XRD, AND SEM TESTS ON API ALAM IN PAMEKASAN Joni, Idon; Vikki Ariyanto, Sandy
Indonesian Physical Review Vol. 5 No. 2 (2022)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v5i2.138

Abstract

Research has been conducted into the nature of geothermal rocks in Pamekasan. This place is located in Tlanakan Pamekasan. This study aims to determine the composition of mineral compounds in the soil so that fire can burst out from the soil and the soil does not melt. Three steps can be done with simple refinement and filtering methods, namely X-Ray Fluorescence (XRF), X-ray diffraction (XRD), and Scanning Electron Microscope (SEM). The results of XRF analysis show the element of Api Alam 1 is Ca 66.2%, Api Alam 2 is Si 37.4%, and in hot springs, is Si 39.6%. The XRD results show that mineral qualitatively in Api Alam 1 was in the form of CaCO3 compound at 60.1% and SiO2 at 39.9%, while in Api Alam 2, hot water sources were in the form of SiO2 compound (>90%). SEM Results on Api Alam 1 show that the sample is almost homogeneous (the distribution of CaCO3 and SiO2 is uneven), the presence of slab-shaped clumps that identify the presence of varying grain size, and with high porosity, which indicates that the sample is partially amorphous in structure, in Api Alam 2. The Hot springs show irregular aggregations and poor homogeneity of the sample. The size of the three samples is ten μm or 10.000 nm, while PSA results showed an average size of Api Alam 1 was 509.7 nm, Api Alam 2 was 891.3 nm, and Hot Springs was 468.3 nm.
CHARACTERIZATION OF (Mg0.5ZN0.5)TiO3 CERAMICS AS MATERIAL CANDIDATES FOR DIELECTRIC RESONATOR AT MICROWAVE FREQUENCY Mugni Muammar, Asep; Ulfah Ermawati, Frida
Indonesian Physical Review Vol. 5 No. 2 (2022)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v5i2.142

Abstract

MgTiO3 ceramic is one of the dielectric materials used as a signal generator (dielectric resonator) in microwave telecommunication devices. This research is intended to explore the possibility of a new composition of MgTiO3-based ceramic, i.e. (Mg0.5Zn0.5)TiO3 (abbreviated MZT05) as a dielectric resonator material. The aim was to characterize the resonant frequency of the ceramics on the microwaves (measured using spectrum analyzer), and the results were correlated to structure (X-Ray Diffraction, XRD), microstructure (Scanning Electron Microscope, SEM), and bulk density data (Archimedes method) of the ceramics. The work was begun by compacting the MZT05 crystalline powder in a cylindrical shape with a diameter of 5 mm using a uniaxial die press to produce tablets. The tablets were sintered at 1300 ºC with variations holding times of 6, 8, and 10 h to produce ceramics. The structural data revealed that the MgTiO3 phase was identified as the main ceramics, i.e. (96.32-98.70) %molar. The bulk density increased with increasing sinter holding time, from 2.75 g/cm3 (6 h), 2.84 g/cm3 (8 h) to 2.99 g/cm3 (10 h) due to the increase in grain size diameter from 919.75 nm (6 h), 1090.62 nm (8 h) to 1180.72 nm (10 h) accompanied by a decrease in the size of the pore diameter from 924.14 nm (6 h), 917.05 nm (8 h) to 800.22 nm (10 h). The ceramics produced resonant frequencies of 5.07–5.08 GHz, which implies that the ceramics are proven to be potential candidates for dielectric resonator materials at microwave frequencies, especially at 5.07-5.08 GHz. The varying sinter holding time seems not to influence the resonant frequency of the ceramics because the variation holding times produce similar resonant frequencies.
FABRICATION OF PVA/TiO2 NANOFIBERS BY ELECTROSPINNING METHOD AS PHOTOCATALYTIC DEGRADATIO Aulia Aska Mei, Sisy Anggelina; Hari Kusumawati, Diah
Indonesian Physical Review Vol. 5 No. 2 (2022)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v5i2.145

Abstract

The nanofiber fabrication process was optimized to determine the effect of stress variations on the morphology and diameter of the nanofibers produced for the absorption of methylene blue dye in water. PVA/TiO2 nanofibers were made using the electrospinning method. The nanofiber fabrication process begins by dissolving 10% PVA with the addition of 0.05 g of TiO2 nanoparticles, the collector tip distance is 15 cm with varying voltages of 12, 15, and 18 kV. PVA/TiO2 nanofiber characterization was carried out using FTIR, SEM, EDS, and UV-Vis Spectrophotometer. The results showed success in forming PVA/TiO2 nanofibers. The nanofibers show a fibrous structures with a diameter of 252 nm for PVA and 237 nm for PVA/TiO2 with a uniform surface and contained TiO2 nanoparticles scattered within the nanofibers. The photocatalytic testing within 5 hours shows that PVA nanofibers can degrade up to 39.29% of the methylene blue dye, while TiO2 powder is up to 55.48%. Hence, the PVA/TiO2 nanofibers can degrade the dye up to 97.02%. The results of good transparency on the UV-Vis Spectrophotometer test are shown in the visible light region caused by the uniform distribution of TiO2 nanoparticles in the nanofiber.
DIMENSIONALITY AND GEOELECTRICAL STRIKE OF MAGNETOTELLURIC DATA USING TENSOR IMPEDANCE IN “X-AREA” EAST NUSA TENGGARA, INDONESIA Heidar, Ismail; Yatini, Y; Asep, Sugianto
Indonesian Physical Review Vol. 5 No. 2 (2022)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v5i2.147

Abstract

Geothermal exploration was conducted using the magnetotelluric method in “X-area” East Nusa Tenggara, Indonesia, to obtain the potential area and subsurface structure information. Dimensionality analysis and rotation by tensor impedance were conducted to determine the data character and regional geoelectrical strike direction of the 9-point measurement. Skew and polar diagrams were produced to estimate dimensionality inversion and azimuth rotating MT data as geoelectrical strike research areas. The result shows that the domination of skews greater than 0.3 indicates 1-D and 2-D data character. The data was validated by polar diagram analysis at 10-2 Hz to 103 Hz frequency to find 2-D characters and 2D modeling. The geoelectrical strike analysis obtained MT data rotation shows the research area with regional strike N 107° E as an azimuth for rotating nine sites’ MT data. The result of modeling by data analysis shows no ambiguity model, lowest RMS grade, and matches with the geological condition of the research area.
ANALYSIS OF THE SIGNAL TO NOISE RATIO IN USE OF 15% KVP RULE METHOD IN THE RADIOGRAPHY EXAMINATION SUPINE AP CHEST Sutoro, Shinta Gunawati; Irsal, Muhammad; Budiati, Tri Asih; Yansyah, Andri
Indonesian Physical Review Vol. 5 No. 2 (2022)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v5i2.141

Abstract

The exposure factor is one of the important parameters in optimizing the radiographic examination. This study aimed to analyze the value of the Signal To Noise Ratio (SNR) against the use of the 15% kV rule method in the examination of Chest AP Supine. Descriptive quantitative research method conducted in the laboratory of the Department of diagnostic imaging and radiotherapy, Health Polytechnic of the Ministry of Health, Jakarta 2, using computer radiography, X-rays, piranha radiation detectors, and anthropomorphic phantoms, with statistical analysis of the Pearson test to determine the level of relationship between SNR and Exposure Index (EI). Against the 15% kV rule method, then the one-way ANOVA test to determine the effect of the 15% method on changes in value. The results of the Pearson test obtained a p-value of 0.820 with a strong relationship between SNR and EI against the 15% kV method. Therefore, using an exposure factor of 15% kV rule method makes it possible to control the SNR and EI values. The one way ANOVA test has a p-value of 0.943, so there is no significant difference in the SNR value to changes in the exposure factor with the 15% kV rule method so that the optimization of the exposure factor with the 15% kV rule method can reduce the radiation dose while maintaining the image quality radiographic
THICKNESS OPTIMIZATION OF ORGANIC SOLAR CELL BY OPTICAL AND 1D DRIFT-DIFFUSION ELECTRICAL MODELING Hidayat, Anjar Taufik
Indonesian Physical Review Vol. 5 No. 2 (2022)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v5i2.149

Abstract

Finding the best thickness combination of the active layer and the interlayer of organic solar cells is essential to optimizing and producing an efficient device. In this research, the thickness combination was graphed by two scan steps, i.e., the major scan (50 nm - interval) followed by the minor scan (10 nm - interval). The solar cell device was modeled by optical and 1D drift-diffusion modeling in the gvdm simulation software with P3HT: PCBM as the active layer and three different materials for the hole-selective layer (interlayer). The best power conversion efficiencies were 5.21, 4.14, and 5.22% when PEDOT: PSS, V2O5, and Spiro-OMeTAD were interlayer materials. The effective thickness for every interlayer material is 10 nm, while the effective thickness of the active layer is 220 nm (for PEDOT: PSS and Spiro-OMeTAD devices) and 230 nm (for V2O5 device). As a result, each device gives higher power conversion efficiency than that from the original setting of the software. Furthermore, this study's highest power conversion efficiency was higher than previously reported. These results suggest that scanning a more extensive range of layer thickness combinations is necessary to find the highest power conversion efficiency possible for every organic solar cell device
COMPARISON OF INFRARED AND OPTOCOUPLER SENSORS PERFORMANCE FOR LAB-SCALE RPM MEASUREMENT SYSTEM Afifah Amatullah, Elin Nur; Ekawita, Riska; Yuliza, Elfi
Indonesian Physical Review Vol. 5 No. 2 (2022)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v5i2.150

Abstract

In utilizing various alternative energy, generators are used to convert alternative energy into electrical energy, for example, biomass, wind, and hydroelectricity. Generally, the measurements made on the generators are rotational speed measurements in the form of revolutions per minute (RPM). In developing lab-scale alternative power sources, the availability of generators with complete quality and specifications is still minimal, including RPM capacity. Therefore, the measurement which can read the RPM accurately, digitally, and automatically is needed. However, the measurement tools available are still manual, not automatic, and prone to parallax errors. Hence, a digital and automatic RPM measurement was developed in this study. Two different sensors were used to develop digital RPM based on a microcontroller. The stages obtained started with electronic system development, calibration, and testing of lab-scale renewable energy systems. The measurement can be read from the infrared and optocoupler sensors on the Archimedes turbine. The measurement results showed that the use of the Optocoupler sensor is more accurate than the infrared sensor. This is based on the data obtained from calibration and testing results on the Archimedes turbine. This RPM measurement is digital and real-time.

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