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INDONESIA
Jurnal Fisika Unand
Published by Universitas Andalas
ISSN : 23028491     EISSN : 26862433     DOI : https://doi.org/10.25077/jfu
Core Subject : Science, Engineering,
Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics
Makalah yang dapat dipublikasikan dalam jurnal ini adalah makalah dalam bidang Fisika meliputi Fisika Atmosfir, Fisika Bumi, Fisika Intrumentasi, Fisika Material, Fisika Nuklir, Fisika Radiasi, Fisika Komputasi, Fisika Teori, Biofisika, ataupun bidang lain yang masih ada kaitannya dengan ilmu fisika.
Arjuna Subject : Fisika dan Astronomi - Fisika Nuklir dan Molekuler, dan Ooptik
Articles 13 Documents
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Search results for , issue "Vol 14 No 6 (2025)" : 13 Documents clear
Indonesia Sistem Pengukuran dan Analisis Debit Air pada Kebocoran Pipa PDAM Rumah Tangga Berbasis Internet of Things Oktarisa, Dian; Yusfi, Meqorry; Harmadi, Harmadi
Jurnal Fisika Unand Vol 14 No 6 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.6.577-584.2025

Abstract

Pipe leaks in household PDAM systems often lead to water wastage and increased bills. This research develops a measurement and analysis system for water flow in household PDAM pipe leaks based on the Internet of Things (IoT) to address this issue. The system uses water flow sensors YF-S201 connected to a NodeMCU ESP8266 to measure water flow rates. It monitors two pipe branch areas, with each branch equipped with a water flow sensor at both the inlet and outlet points. The NodeMCU ESP8266 compares the incoming and outgoing water flow rates for each branch. If the flow rates are identical between the two sensors, the pipe is deemed safe; however, any discrepancy between the flow rates indicates a potential leak. The system can identify the area and severity of the leak based on the flow rate difference and calculate the water usage cost. Data collection is performed in the morning, afternoon, and evening, with six trials at each measurement time. The trials are conducted at 5-minute intervals to measure water volume and flow rate. Testing results show an average error percentage of 2.2% compared to a measuring cup, with system accuracy reaching 97.8%. Measurement data is displayed on an LCD and sent to the Blynk app via smartphone for remote monitoring.
Analisis Nilai Dosis Radiasi yang diterima Rektum dan Kandung Kemih Pasien Kanker Serviks menggunakan Metode 2D dan 3D-CT pada Brakiterapi Fathanah, Nurul; Milvita, Dian; Diyona, Fiqi
Jurnal Fisika Unand Vol 14 No 6 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.6.526-531.2025

Abstract

Research has been conducted on the analysis of radiation doses received by the rectum and bladder of cervical cancer patients using 2D and 3D-CT methods in brachytherapy at the Radiation Oncology Installation of Andalas University Hospital. The study used data on cervical cancer patients stage IIB-IVA, as many as 10 patient data using the 2 Dimensional (2D) method and 10 patient data using the Three Dimensional Computed Tomography (3D-CT) method. Analysis was performed by comparing 2D and 3D-CT brachytherapy methods. The results showed that the average radiation dose value received by the rectum of patients using the 3D-CT method was 491.31 cGy and the 2D method was 466.13 cGy, while in the bladder the average radiation dose received by patients using the 3D-CT method was 448.39 and the 2D method was 480.30. The results showed that the average radiation dose using the 3D-CT method was greater than the 2D method, but the dose received by the rectum and bladder did not exceed the tolerance limit set by the American Brachytherapy society (ABS).
ANALISIS DOSIS RADIASI TERHADAP PARAMETER HEMATOLOGI BERDASARKAN FAKTOR DEMOGRAFI PEKERJA RADIASI DI RSUP DR. M. DJAMIL PADANG Nasution, Rihadatul Aisy Syofyani; Milvita, Dian; Adrial, Rico
Jurnal Fisika Unand Vol 14 No 6 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.6.532-539.2025

Abstract

Research on the analysis of radiation dose on hematological parameters based on demographic factors of radiation workers has been conducted at Dr. M. Djamil Hospital Padang. The study aims to analyze the impact of radiation dose on hematological parameters of radiation workers and to evaluate the role of demographic factors such as age, years of service, profession, and work unit in determining the hematological condition of workers. The study utilized secondary data on radiation dose levels of radiation workers from 2022-2023, measured using Thermoluminescence Dosimeter (TLD) badges, and secondary hematological data from the same period obtained from the results of Medical Check-Ups (MCU) of radiation workers. The relationship between radiation dose, hematological parameters (red blood cells, white blood cells, and platelets), and demographic factors was evaluated using ANOVA and Kruskal-Wallis statistical analysis tests. The results of the study showed that the radiation dose received did not significantly affect hematological parameters. However, age and work experience significantly influenced red blood cell counts. Occupation and work unit did not show a significant relationship with hematological parameters.
Implementasi Seismik Refraksi Metode Hagiwara untuk Pendeteksian Bidang Gelincir di Sempadan Sungai Daerah Perumahan Sungai Bangek Khaidir, Humaira Aryanti; Pohan, Ahmad Fauzi
Jurnal Fisika Unand Vol 14 No 6 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.6.554-560.2025

Abstract

The rapid development in the riparian zone of the Bangek River, Koto Tangah District, Padang City, has the potential to increase the risk of geological hazards such as landslides. This study aims to identify the subsurface structure and the presence of slip surfaces in the riverbank area that is being developed into a residential zone, using the Hagiwara method. Data acquisition was carried out along two survey lines, oriented perpendicular and parallel to the river, with offsets of 40 m and 30 m, respectively, employing four geophones and a 10 kg hammer as the seismic source. The interpretation results from the first survey line indicate that the subsurface consists of unsaturated sand and weathered layers, with evidence of a slip surface at a distance of 0–18 m and depths ranging from 0.7–4 m. This slip surface is located within a permeable layer with a low seismic velocity (368.955 m/s), overlain by an impermeable layer with a higher velocity (642.508 m/s). Meanwhile, the second survey line reveals a relatively homogeneous structure composed of weathered layers with varying densities. The Hagiwara interpretation identifies a slip surface along the second refractor, indicating potential slope instability within the first layer characterized by a low seismic velocity (449.165 m/s), suggesting weaker rock compaction. The information regarding the presence and depth of the slip surfaces identified in this study provides an important reference for development planning to mitigate the potential risk of landslides in the Bangek River riparian zone.
Rekonstruksi Fantom Toraks Menggunakan Nilai Densitas Hounsfield Unit sebagai Fantom Alternatif untuk Verifikasi Dosis Radiasi Diyona, Fiqi; Muttaqin, Afdhal; Rafli, Rhandyka
Jurnal Fisika Unand Vol 14 No 6 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.6.540-545.2025

Abstract

Phantoms play an essential role in medical physics, particularly for radiation dose verification, yet the high cost of commercial standard phantoms often limits their availability. This study aimed to reconstruct a thoracic phantom as a replica of the human chest cavity using simple and low-cost materials. The reconstruction process began with evaluating the density values of the selected materials: cadaver bone was used as a substitute for human bone, styrofoam for lung tissue, and plasticine for soft tissues such as muscle and fat. Density measurements showed that cadaver bone ranged from +350 HU to +1000 HU, styrofoam from –700 HU to –950 HU, and plasticine from +39 HU to +234 HU. The skeletal-based reconstruction successfully represented the anatomical alignment of thoracic organs, as confirmed by CT simulator imaging. These findings indicate that the reconstructed thoracic phantom provides a feasible and cost-effective alternative to expensive commercial phantoms and can be effectively utilized for radiation dose verification in medical physics applications.
Pengaruh Waktu Hidrotermal Terhadap Sifat Optik Nanokomposit Fe3O4@CQD (Carbon Quantum Dots) Rafsanjani, Putri Azima; Astuti, Astuti
Jurnal Fisika Unand Vol 14 No 6 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.6.561-568.2025

Abstract

This study aims to synthesize Fe₃O₄@CQD nanocomposites using a hydrothermal method with time variations to study their effects on the structural and optical properties of the material. Fe₃O₄ nanoparticles were obtained through a coprecipitation method, while CQDs were synthesized from the extract of sappan wood (Caesalpinia sappan L.) which is natural, environmentally friendly, and has the potential as a fluorescent material. The results of XRD characterization showed that Fe₃O₄ has a crystal size of 22.476 nm, while the addition of CQDs increased the crystal size of the nanocomposite. FTIR analysis confirmed the presence of typical functional groups such as Fe–O, O–H, C–H, and C=O indicating the presence of CQDs in Fe₃O₄. UV-Vis test shows that Fe₃O₄@CQD has an absorption peak in the wavelength range of 300-700 nm, while the fluorescence test shows that the emission intensity increaseswith increasing hydrothermal time, with the emission peak at a wavelength of 600–650 nm.
Sintesis Nanopartikel ZnO Menggunakan Prekursor ZnCl2 dan Polimer Penstabil Tween 80 untuk Aplikasi Tabir Surya Rozi, Anisa Nurraeni; Saragih, Horasdia
Jurnal Fisika Unand Vol 14 No 6 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.6.585-594.2025

Abstract

ZnO nanoparticles are semiconductor materials with a wide energy band gap (3.37 eV), making them excellent for use as sunscreen ingredients due to their superior ultraviolet protection properties. ZnO nanoparticles are superior to other conventional sunscreen materials because they do not cause skin irritation or allergies. The purpose of this study was to synthesize ZnO nanoparticles as a sunscreen material using Tween 80 stabilizing polymer and to comprehensively examine the effect of Tween 80 concentration on the characteristics of the resulting ZnO nanoparticle sunscreen. ZnO nanoparticles were synthesized using ZnCl2 and Tween 80 precursors with a Rotor Stator Homogenizer equipment system. Four different concentrations of Tween 80 were used to observe their effect on the characteristics of the resulting ZnO nanoparticles. The results showed that the average diameter of ZnO nanoparticles, their polydispersity index, and their zeta potential decreased as the concentration of Tween 80 used increased. Their optical transmittance was very high in the visible light spectrum and very low in the ultraviolet spectrum, especially for ZnO nanoparticles with the smallest average diameter (11.6 nm). This means that the visible light transmission and ultraviolet light absorption are excellent. In addition, the absorption edge is also very sharp. These three properties indicate that the ZnO nanoparticles produced are very suitable and have great potential for use as a sunscreen material.
Studi Komparatif Triangular dan Quadrilateral Mesh pada Inversi Geolistrik 2D Wenner-Schlumberger untuk Zona High resistivity di Terowongan 11 Padalarang Rudi Cahyadi; Widodo, Widodo
Jurnal Fisika Unand Vol 14 No 6 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.6.546-553.2025

Abstract

This study aims to compare the results of 2D electrical resistivity inversion using triangular and quadrilateral mesh types in the Wenner–Schlumberger configuration to identify high-resistivity zones at Tunnel 11, Padalarang. Data acquisition was performed using 48 electrodes with a 10 m spacing and an ARES II multichannel resistivity meter. Data inversion was conducted with the ResIPy software employing two different mesh approaches. The results show that the triangular mesh produces smoother models, better adapts to topography, and achieves lower root mean square (RMS) errors (1.09–1.12%) compared to the quadrilateral mesh (4.67–4.72%). High-resistivity zones (>60 Ωm), interpreted as andesitic basalt, were identified at depths greater than 25 meters. The extent of these zones increases from Line 2 to Line 1, which has implications for blasting or drilling strategies during tunnel construction. These findings indicate that triangular mesh is more effective for complex geological conditions.
Identification of Abrasion-Prone Areas Based on Vertical Electrical Sounding at Geotourism Beach Pasar Bawah South Bengkulu Kamila, Nur Husniatin; Suhendra, Suhendra; Halauddin, Halauddin; Ulandari, Clora; Hasugian, Basdiki; Al Akbar, M Riski; Raihana, Hana; Al Ansory, Andre Rahmat
Jurnal Fisika Unand Vol 14 No 6 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.6.569-576.2025

Abstract

This research was conducted to investigate abrasion-prone areas using the Vertical Electrical Sounding (VES) method at Pasar Bawah Manna Beach, South Bengkulu Regency. Data collection using a track length of 200 with the MAE X612-EM geoelectric tool that runs along the abrasion-prone area. Data processing using IP2WIN software and satellite images. This study aims to determine the subsurface of abrasion-prone areas and rock characteristics of abrasion. The results of this study indicate that the research location has seawater ntrusion that seeps into the aquifer with a resistivity value of (0.763 - 8.01 Ωm) and the rock formation of the research area is dominated by alluvium rocks including gravel (130 - 356. 2 Ωm), clay (14.65 Ωm), silt (16.5 -61.41 Ωm), sand (258 - 313 Ωm), sandstone (97.6 Ωm), passive gravel (1496 Ωm), and limestone (2560 Ωm). Based on satellite image data, abrasion-prone is identified from several points in the study area that have significant shoreline changes at sounding point 1 where the point from 2008 to 2023 shows that abrasion has occurred quite significantly over the past 15 years, where at Sounding point 1 abrasion occurs along ± 23 meters / year. The findings of this research are expected to provide knowledge about disaster mitigation in sustainable tourism governance.
Modifikasi Struktur Akseptor Zat Warna Tipe D-π-A Berbasis Ditiofen sebagai Sensitizer pada Sel Surya Reshiva, Reshiva; Imelda, Imelda; Syukri, Syukri; Admi, Admi; Deswita, Elvira
Jurnal Fisika Unand Vol 14 No 6 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.6.614-622.2025

Abstract

This study aims to evaluate the effect of variations in the acceptor group of dithiophen-based type D-π-A dyes that are efficiently used as sensitizers in DSSC. The calculation uses the 16W Gaussian program with Density Functional Theory (DFT) and Time Dependent-DFT (TD-DFT) methods with the B3LYP/6-31G set base. Based on the results of the study, it is known that acceptor variations can affect the shift in absorption spectrum and bandgap values. The dye AT5 is predicted to have higher efficiency to be used as a sensitizer, because it has the smallest bandgap value and has a dipole moment value, as well as a larger wavelength. The smaller the bandgap value, the absorbedyu light will shift towards the red shift, and the electron excitation process will be easier. It can be concluded that dyes with cyanide formal acceptors can improve the efficiency of D-π-A type dyes as sensitizers in DSSC.

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