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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 1,782 Documents
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Biosintesis Nanopartikel ZnO Menggunakan Ekstrak Daun Tanaman Jagung (Zea Mays L.) Adeningrum, Della Arista; Rosa, Aulia; Wahyusi, Kindriari Nurma; Yogaswara, Rachmad Ramadhan
Jurnal Fisika Unand Vol 14 No 2 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.2.160-166.2025

Abstract

ZnO nanoparticles can be synthesized using the biosynthesis method using corn plant leaf extract (Zea Mays L.) as a bioreductant. The aim of this research is to examine the effect of variations in Zinc Nitrate Hexahydrate precursor concentration and calcination temperature on the yield, as well as the characterization of ZnO nanoparticles. Corn plant leaves are extracted to obtain flavonoid compounds. The resulting extract is mixed with the precursor solution then calcined to obtain ZnO nanoparticles.  The highest yield was produced in a sample with a precursor concentration of 0.1M with a calcination temperature of 300˚ C of 22.6082%. SEM-EDX results on samples with a precursor concentration of 0.3 M and a calcination temperature of 700˚C show various particle morphologies and sizes of ZnO nanoparticles, namely 91 nm; 97 nm; 109 nm; 435nm; and 973 nm, and the composition of ZnO nanoparticles consists of 76.43% Zn atomic weight and 23.57% O ​​atomic weight. at a calcination temperature of 700˚ C shows a pure ZnO sample with an element composition of 80.3% Zn atomic weight and 19.7% O atomic weight. The size of the crystal diameter for XRD analysis on samples with a precursor concentration of 0.3M with calcination temperatures of 300 ˚C and 700˚ C were 40.8564 nm and 31.7203 nm, respectively. Both samples have the same crystal system, namely hexagonal zincite.
Identifikasi Batuan Reservoir Panas Bumi di Daerah Tambang Sawah, Lebong Provinsi Bengkulu Menggunakan Data Gravitasi Satelit GGMPlus dengan Inversi 2D Hardianza, Meno; Hadi, Arif Ismul; Hilmi Zakarya
Jurnal Fisika Unand Vol 14 No 2 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.2.177-183.2025

Abstract

The Tambang Sawah geothermal field located in Lebong Regency, Bengkulu Province, is one of the geothermal energy potentials in Indonesia. The area is associated with tectonic activity in the bukit barisan mountain range which is indicated by the appearance of hot springs and fumaroles. This research uses Global Gravity Model (GGM) gravity data, in the form of Free Air Anomaly (FAA) data with a resolution of 220 metres and shuttle radar topography mission (SRTM2Gravity) as contemporary terrain correction data in the form of full scale gravity data. The FAA data was then subtracted from the full scale gravity data to obtain the complete Bouger anomaly (CBA). The CBA was subjected to spectrum analysis to determine the depth estimate and then separated to obtain regional and residual anomalies using the moving average method. There are three distribution patterns of anomaly distribution, namely low, medium and high. The results showed that on the CBA map, areas with moderate anomalies were thought to have geothermal reservoirs with densities < 2.53 g/cm3 different depths.
Suseptibilitas Magnetik, pH dan Kandungan Mineral untuk Uji Tingkat Kesuburan Tanah pada Lahan Perkebunan Kemiri di Kecamatan IX Koto Sungai Lasi Oktavia, Geby Sri Ayu; Pohan, Ahmad Fauzi
Jurnal Fisika Unand Vol 14 No 3 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.3.263-269.2025

Abstract

Research has been conducted on the value of magnetic susceptibility, pH and mineral content to test the level of soil fertility in Nagari Indudur, District IX Koto Sungai Lasi. Samples were taken at the location of candlenut plantations in two different locations that were suspected of experiencing a decrease in soil fertility. Sampling was taken at 6 points with three depth variations, 30 cm, 60 cm and 90 cm so that 36 samples were obtained. The distance between sampling points is 2 m. Magnetic susceptibility measurements using the MS2B Bartington Susceptibility Meter using two frequencies, namely 0,47 kHz LF (Low Frequency) and 4.7 kHz HF (High Frequency). At location 1, the average value obtained is 181.2089 x10-8 m3/kg, while the average χHF value obtained is 170.5870x10-8 m3/kg. At location 2 the average χLF value obtained is 487.6539x10-8 m3/kg, while the average χHF value obtained is 480.5271 x10-8 m3/kg. with an average pH in both locations of candlenut plantations is acidic. This occurs because of the excess of Si and Al elements that make the plantation soil acidic, as well as the deficiency of Magnesium (Mg) and sulfur, minerals that make candlenut plants experience a decrease in production. Besides that deposition on plantation land is also one of the triggers for soil in the plantation location to experience a decrease in soil fertility.
Evaluasi Dosis Radiasi Hambur Pemeriksaan CT Scan Thorax pada Organ Gonad dan Tiroid Magfirah, Magfirah; Adrial, Rico; Ulya, Syarifatul
Jurnal Fisika Unand Vol 14 No 1 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.1.82-88.2025

Abstract

Research has been carried out regarding the evaluation of scattered radiation dose during CT scans of the thorax on the gonads and thyroid using 30 patients with CT scans of the thorax. In this study, the radiation dose received by thorax CT Scan patients was measured using TLD-100 which was placed at 3 measurement points on the patient. The first point was placed on the thyroid using 1 TLD, the second point on the thorax using 2 TLDs, and the third point was placed on the gonads using 1 TLD. The thorax CT Scan examination used a tube voltage of 120 kV. The results showed that the DLP and CTDIvol values ​​affected the value of the effective dose received. The average values ​​of CTDIvol and DLP were 6.268 mGy and 782.196 mGy.cm and the average thorax dose was 2.495 mSv. The average CTDIvol and DLP values ​​obtained in the study did not exceed the threshold set by the BAPETEN Regulation in 2021, namely the CTDIvol and DLP values ​​were 16 mGy and 810 mGy.cm. Radiation that affects the gonads and thyroid organs is scattered radiation. The average radiation dose received on the gonads and thyroid organs was 0.121 mSv and 0.485 mSv. The average dose value received did not exceed the dose received on the thorax and the radiation dose received on the thyroid was greater than the radiation dose received on the gonads. This is because the thyroid organ is closer to the irradiation area than the gonad organ.
Prototipe Sistem Kontrol dan Monitor Tanaman Hidroponik pada Sayuran Pakcoy Berbasis Internet of Things Muhammad Fadlil; Firmawati, Nini
Jurnal Fisika Unand Vol 14 No 2 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.2.191-197.2025

Abstract

A prototype of hydroponic plant control and monitoring system for pakcoy vegetables using NodeMCU ESP8266 with notification via Telegram has been produced. This system can facilitate farmers to monitor and control hydroponic plants remotely with parameters of plant height, pH, water level of hydroponic plants. The prototype is designed using 2 HC-SR04 ultrasonic sensors, pH sensors, servo motors, NodeMCU ESP8266, and telegram applications using the Internet of Things (IoT). Tests were carried out by observing pakcoy plants for 28 days after seeding. The measurement results displayed via telegram found that the percentage error of plant height, water pH, and water level are 1.88%, 1.38%, and 6.81%, respectively, and the water tap can function when the water level on the plant is less than 5 cm.  Based on the results obtained, this system can work well.
Optimalisasi Priority Pada Organ at Risk (OAR) Kanker Nasofaring Menggunakan Teknik Intensity Modulated Radiation Therapy (IMRT) Relis, Septya Annisa; Dian Milvita; Fiqi Diyona
Jurnal Fisika Unand Vol 14 No 3 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.3.270-278.2025

Abstract

Optimization of priority on Organ At Risk (OAR) of nasopharyngeal cancer using Intensity Modulated Radiation Therapy (IMRT) technique has been conducted. The research was conducted using 5 images of nasopharyngeal cancer patients processed using Treatment Planning System (TPS) Eclipse software at Andalas University Hospital. The purpose of this study was to determine the priority value of Planning Target Volume (PTV) and OAR by analyzing the value of Conformity Index (CI), Homogeneity Index (HI) and OAR radiation dose on the Dose Volume Histogram (DVH) curve based on 6 planning variations. The planning variations used are priority values on PTV 100,110,120,130,140 and 150. Variations of priority values on OAR 40,50,60,70,80 and 90. The results of the study obtained the optimal priority value for each nasopharyngeal cancer patient's initials are S, J, SS, ED and B for PTV which is 120. On the brain stem OAR is 103, 85, 90, 103, and 85. The spinal cord OAR is 82,88,85,85, and 85. The OAR of the eye lens was 58,100,90,85 and 90. The OAR of the eye was 65,90,70,0 and 80. The OAR of the mandible was 72,100,90,99 and 80. Analysis of CI and HI values based on the International Commission on Radiation Units and Measures (ICRU) Report 62 and 83. The radiation dose to the OAR was verified based on the Quantitative Analysis of Normal Tissue Effect in the Clinic (QUANTEC) standard. The priority value obtained in this study will be a reference for medical physicists in making radiotherapy planning.
Pemetaan Zona Rawan Longsor di Kawasan Agam-Bukittinggi Berbasis Google Earth Engine Menggunakan Teknik Evaluasi Multi-Kriteria Hilalliyah, Nisful; Namigo, Elistia Liza
Jurnal Fisika Unand Vol 14 No 3 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.3.242-248.2025

Abstract

Landslide vulnerability zone mapping with Google Earth Engine (GEE) has been conducted through a multi-criteria evaluation technique that encompasses scoring, categorization, and overlay of five landslide characteristics in the Agam and Bukittinggi regions of West Sumatra. The criteria utilized are slope, rainfall, land usage, rock type, and soil type. The supervised classification technique employing a random forest classifier is utilized to generate land use categorization maps. The mapping results indicate that the Agam-Bukittinggi region is predominantly characterized by a high to very high degree of landslide susceptibility, encompassing 77,5% (1680,55 km2) of the overall research area, with a medium level of vulnerability. Regions exhibiting high to very high susceptibility to landslides including Tanjung Raya District, Matur District, Malalak District, IV Koto District, Palupuh District, Palembayan District, Tilatang Kamang District, Ampek Angkek District, Kamang Magek District, Banuhampu District, Matur District, Sungai Pua District, Candung District, Baso District and Bukittinggi City. Simultaneously, there exists a 22% risk of moderate landslides in Ampek Nagari District, Lubuk Basung, and Tanjung Mutiara Districtsis.
IDENTIFIKASI PENCEMARAN LOGAM BERAT TANAH PERMUKAAN DI SEKITAR PLTU TELUK SIRIH DENGAN METODE SUSEPTIBILITAS MAGNETIK Manalu, Githa Sortania; Afdal, Afdal
Jurnal Fisika Unand Vol 14 No 1 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.1.89-94.2025

Abstract

Magnetic susceptibility analysis of surface soil around Teluk Sirih Power Plant in Padang city has been conducted. Soil sampling was conducted at 28 points at a depth of 30 cm. The results show that the magnetic susceptibility value of surface soil range from 81.4667×10-8 m3/kg to 934.2133×10-8 m3/kg. The magnetic susceptibility value indicates that the surface soil around the PLTU is moderately to highly polluted, with several points of low pollution. The further from the PLTU, the lower the magnetic susceptibility value, indicating that the pollution comes from emissions from coal combustion at the PLTU. The further from the road, the lower the magnetic susceptibility value, indicating that there are other sources of pollution from vehicle emissions passing through the road. It also found that vegetation affects the level of soil pollution as indicated by the magnetic susceptibility value in the vegetated zone being lower than the magnetic susceptibility value in the non-vegetated zone.
Identifikasi Segmen Talamau Menggunakan Kombinasi Data Satelit GGMPlus dan Koreksi SRTM2gravity Berdasarkan Analisis Second Vertical Derivative (SVD) Khairunnisa, Widya Indah; Pohan, Ahmad Fauzi
Jurnal Fisika Unand Vol 14 No 2 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.2.198-204.2025

Abstract

The existence of the Talamau segment was only identified by the BMKG after the earthquake that occurred on Friday morning 25 February 2022 in Talamau District, West Pasaman Regency. This earthquake had a magnitude of 6.1 Mw with 201 aftershocks. This research aims to determine the characteristics of the fault types of the Talamau segment using the gravity method. The gravity method can describe subsurface geological structures based on differences in rock density known as gravity anomalies. Gravity data is taken from satellite gravity data in the form of GGMplus data and SRTM2gravity topography data. The resulting gravity anomaly value can be used to determine the characteristics of the fault type using Second Vertical Derivative (SVD) analysis. The combination of GGMplus and SRTM2gravity data provides results that can describe the existence of the Talamau segment based on differences in rock density contrast. The existence of the Talamau segment is in a moderate anomalous pattern with the constituent components namely alluvium rock, gravel sand, silt, Talamau mountain rock, inseparable volcanic rock, intrusive rock, and Kuantan formation rock. From the SVD analysis, the characteristics of the fault type of the Talamau segment are also obtained, namely strike-slip faults.  
ANALISIS AKTIVITAS SPESIFIK RADIONUKLIDA DI KAWASAN BALAI PENELITIAN TERNAK UNGGUL DAN HIJAUAN PAKAN TERNAK (BPTU-HPT) PADANG MANGATAS SUMATERA BARAT Regiska, Nadia; Milvita, Dian; Sukadana, I Gde; Effendi, Erawan; Ramadhani, Syarifah
Jurnal Fisika Unand Vol 14 No 3 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.3.255-262.2025

Abstract

Specific activity analysis of radionuclides in the area of the Research Center for Superior Livestock and Green Animal Feed (BPTU-HPT) Padang Mangatas, West Sumatra has been conducted. This study aims to determine the specific activity of natural radionuclides Ra-226, Th-232, Th-228, K-40 and U-238 based on PERKA BAPETEN NO.16 of 2013 and artificial radionuclides Cs-137 based on PERKA BAPETEN NO.16 of 2012 and determine the distribution of radionuclides based on contour maps. The measured samples consisted of 1 kg of soil at a depth of (010) cm, (10-20) cm and (20-30) cm at 6 location points, 2 kg of grass, and 2 liters of water. The study began with sample preparation, then measured for 17 hours using a calibrated gamma spectrometer. The measurement results showed the specific activity of radionuclides Ra-226, Th-232, Th-228, K-40, U-238 and Cs137 in some soil and grass samples but were not detected in water samples. The specific activity of natural radionuclides in soil and grass samples is below the maximum limit set by PERKA BAPETEN NO.16 of 2013 which is 1000 Bq/kg and Cs-137 is below the maximum limit set by PERKA BAPETEN No. 16 of 2012 which is 100 Bq/kg. The distribution of radionuclide specific activity in the BPTU-HPT Padang Mangatas area based on contour maps has a varied distribution and is significantly distributed in soil samples at a depth of (20-30) cm.

Page 172 of 179 | Total Record : 1782

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