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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 40 Documents
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Search results for , issue "Vol 13 No 4 (2024)" : 40 Documents clear
Identifikasi Pencemaran Air Sungai Batang Tebo di Kabupaten Bungo Berdasarkan Parameter Fisis dan Kimia Janah, Raudahtul; Afdal, Afdal
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.490-496.2024

Abstract

This research aims to determine the level of water pollution in the Batang Tebo River in Bungo Regency based on physical and chemical properties. The chemical parameters calculated are pH and concentration of heavy metals Hg, Pb, and Cu. The physical parameters calculated are TDS, TSS, temperature, and turbidity. All parameters except TSS, turbidity, and heavy metal concentrations were measured in the field. The level of river water pollution is analyzed using the Pollution Index (IP). The research results show that the Batang Tebo River water in Bungo Regency is classified as lightly polluted, with an IP value of 4.12. Physical parameters that have exceeded quality standards are a TSS value of 343 mg/L and a turbidity value of 69.60 NTU. In contrast, those that have not exceeded quality standards are temperature values of 29ºC, TDS values of 23 ppm, and electrical conductivity values of 47 µS/cm. Chemical parameters that have exceeded the quality standards, namely the concentration of the heavy metal mercury of 0.0023 mg/L, while those that have not exceeded the quality standards, namely the pH value of 6.58, the concentration of the heavy metal lead is ˂0.005 mg/L, and the concentration of the heavy metal copper is ˂0.018 mg/L. 
Analisis Korelasi Usia, Massa Tubuh, mAs, dan Dosis Efektif Terhadap CTDIvol dan DLP pada Pemeriksaan CT-Scan Pasien Dewasa Dewanti, Wafi Muthia; Milvita, Dian; Fardela, Ramacos; Pratama, Ida Bagus Gede Putra; Herlinda, Sri
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.579-586.2024

Abstract

A research study has been conducted on the correlation analysis of age, body mass, mAs, and effective dose with Computed Tomography Dose Index Volume (CTDIvol) and Dose Length Product (DLP) in CT-Scan examinations at the Radiology Department of Dr. M. Djamil Padang General Hospital. The research utilized data from adult patients aged 15 years and above with a standard body mass (60 ± 10) kg in non-contrast CT scans of the head, chest, and abdomen, with a total of 586 patients collected over a period of 3 months. The analysis was conducted using Pearson correlation test. The research results indicate that the effective dose has a very high correlation with DLP, with a coefficient of 1 and mAs has a very high correlation with CTDIvol and DLP, with a coefficient of 0,9. Body mass has a relatively high correlation with CTDIvol and DLP, ranging from 0,4 to 0,7 except in head examinations. Age has a moderately significant correlation with CTDIvol and DLP, ranging from 0,1 to 0,5.
Pemodelan Struktur Lapisan Bawah Permukaan Berdasarkan Tahanan Jenis di Dusun Rombo Desa Saukang Kecamatan Sinjai Timur Kabupaten Sinjai Provinsi Sulawesi Selatan Rifanzha, Aqil Naufaldy; Lanto, Muh Said; Minarti, Minarti
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.564-572.2024

Abstract

Research has been carried out which aims to model the structure of the subsurface layers in Rombo Hamlet, Saukang Village, East Sinjai District, in Sinjai Regency. This research uses the resistivity geoelectric method of the Wenner-Schlumberger configuration. The number of measurement paths consists of five tracks, each 150 m. The geology of the research location includes the Walanae Formation, which consists of sandstones, conglomerates, tuffs, siltstones, claystones, limestones, and marls. The results of the study allegedly show that the subsurface structure consists of several layers with interpretations in the form of groundwater aquifers, sandstones, and claystones. The first track shows a resistivity value of 0.753 Ωm to 3.22 Ωm where there are free aquifers at a depth of 1.25 meters to 24.0 meters, the second track has free aquifers and confined aquifers with resistivity values of 0.976 Ωm to 3.75 Ωm which are at a depth of 1.25 meters to 28.7 meters, the third track shows a resistivity value of 0.643 Ω to 2.46 Ωm there are free and confined aquifers that spread at depths of 15.9 meters to 28.7 meters, the fourth line has free aquifers and aquifers The depressed aquifer which has a resistivity value of 1.83 Ωm to 6.27 Ωm is at a depth of 5.19 meters to 28.7 meters, while on the fifth line at a depth of 1.25 meters to 28.7 meters there are free aquifers and confined aquifers which have resistivity value of 0.801 Ωm to 4.10 Ωm.
Analisis Komponen Angin Zonal dan Meridional Sebagai Penentu Awal Musim di Wilayah Tana Toraja Utami, Herniella Tiara; Arsyad, Muhammad; Husain, Husain
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.549-556.2024

Abstract

The determination of the onset of season typically utilizes the rainfall distribution pattern during the climatological period in the form of a bar graph. However, according to previous research, the prediction of the onset of the season can also use the components of Zonal and Meridional winds. There hasn't been much research related to the onset of season in Tana Toraja; therefore, this study aims to determine the profile of Zonal and Meridional winds at the 850 mb level and their relation to the onset of season in Tana Toraja during the climatology period from 1998 to 2022 (25 years) as well as during El Niño and La Niña events. Reference data for this analysis is sourced from daily precipitation records from the Toraja Meteorological Station and daily Zonal and Meridional wind array model data from the European Centre for Medium-Range Weather Forecasts (ECMWF). The collected data is then visualized through maps and graphs, followed by spatial and descriptive analysis for the klimatologi period, El Niño, and La Niña events. The analysis findings reveal that the rainfall pattern in Tana Toraja is significantly influenced by monsoonal winds, particularly characterized by the prevalence of westerly Zonal winds during the rainy season. The onset of the rainy season typically occurs in early July, with the peak of the rainy season usually observed from mid-March to mid-April. Zonal winds during El Niño and La Niña events notably impact rainfall accumulation in the Tana Toraja region, resulting in variations in the strength of Zonal and Meridional winds.
Penentuan Aktivitas Radionuklida Alam pada Pemandian Air Panas Gunung Panjang dan Gunung Pancar di Kabupaten Bogor Jawa Barat Zulfa, Naela Amalia; Adrial, Rico; Makmur, Murdahayu; Yahya, Mohamad Nur; Putra, Deddy Irawan Permana; Priasetyono, Yogi
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.541-548.2024

Abstract

Research has been conducted on the determination activity of natural radionuclides at hot springs in Bogor Regency, West Java. This study aimed to determine the concentration value of natural radionuclide activity in hot springs. This study used water samples taken from water samples taken from water in two different hot spring locations, namely in Gunung Panjang Hot Spring and Gunung Panjang Hot Spring. Activity concentrations were measured using an HPGe gamma spectrometer for radionuclides 238U, 232Th, and 40K. Activity concentrations for radionuclide 238U ranged from (0.13 ± 0.01) to (33.82 ± 0.24) Bq/L, for 232Th ranged from (0.08 ± 0.01) to (100.30 ± 0.01) Bq/L and 40K ranged from (0.18 ± 0.01) to (416.84 ± 0.09) Bq/L. The concentration values of 238U, 232Th, and 40K are still below the specified threshold. The activity concentration limit of radionuclides recommended by PERKA BAPETEN No. 9 Year 2009 on Intervention Against Exposure from Technologically Enhanced Naturally Occurring Radioactive Material is 1000 Bq/L for 238U and 232Th and 10,000 Bq/L for 40K.
Analisis Hubungan Suhu, Kelembapan Dan Curah Hujan Di Tana Toraja Dengan Fenomena Perubahan Iklim Pabontongan, Santonius Sandi; Palloan, Pariabti; Susanto, Agus
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.557-563.2024

Abstract

The impact of climate change has emerged as a strategic issue threatening the national interests and environment, particularly in the context of Tana Toraja in the tropical region of Indonesia. The process of climate change, influenced by both natural factors and human activities, has led to a global increase in temperatures and climate anomalies. The risks of natural disasters, especially those related to rainfall such as floods, landslides, and the spread of diseases, are on the rise. The Indonesian government needs to design region development strategies with low greenhouse gas emissions and control deforestation. This study employs a qualitative descriptive method and utilizes data from the Pongtiku Toraja Meteorological Station from 2000 to 2019 to analyze the patterns of climate change and the impact of the El-Nino Southern Oscillation (ENSO) in Tana Toraja. The research findings indicate a decrease in the annual average air temperature, an increase in air humidity, and a shift in rainfall patterns towards an equatorial climate type. The impact of ENSO on air temperature, humidity, and rainfall is variable. Predictions suggest a decrease in rainfall, but combined analyses show an average increase of 4.5% per year until 2029. This conclusion provides a holistic overview of climate dynamics in Tana Toraja, crucial for understanding and planning adaptation for the future.
Potensi Ekstrak Kulit Buah Naga Merah (Hylocereus polyrhizus) sebagai Bioreduktor Untuk Biosintesis Nanopartikel Putri, Hawa Aritma Sunarko; Oktarini, Rahmi; Islamiyah, Syuaibatul; Redjeki, Sri; Yogaswara, Rachmad Ramadhan
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.497-503.2024

Abstract

One type of antioxidant that is usually found in plants such as fruit, skin, leaves, and others is flavonoids. In addition, flavonoids can be used for the formation of nanoparticles (NPs) as a bioreductor. The purpose of this study was to examine the utilization of red dragon fruit peel extract as a bioreductor in the synthesis of zinc oxide nanoparticles from zinc nitrate precursors using the biosynthesis method. Red dragon fruit peel was macerated to obtain flavonoids. Zinc nitrate was used as a precursor to make ZnO NPs. UV-VIS spectrophotometric analysis showed that the total flavonoids contained in the extract were 5.6 x 10-4 mg QE/g. By FTIR test, ZnO nanoparticles are known to contain OH groups characterized by a peak in the 3374.10 cm-1 region. XRD results show that ZnO nanoparticles have a hexagonal wurtzite shape. SEM-EDX results show that the ZnO nanoparticles formed have a size of 157-174 nm and contain the constituent composition of 69.41% zinc and 29.35% oxygen. ZnO nanoparticles have anticancer effects that can be used in anticancer drugs, which can efficiently suppress synergistic cytoxicity in leukemia cell lines under UV irradiation. 
Pemetaan Zona Rawan Banjir di Kabupaten Luwu Utara Menggunakan Metode Analytic Hierarchy Process (AHP) yang Terintegrasi dalam Sistem Informasi Geografis (SIG) Simangunsong, Tiardo; Subaer, Subaer; Palloan, Pariabti
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.525-534.2024

Abstract

Research has been conducted to map flood-prone zones in North Luwu Regency by considering rainfall parameters, soil type, slope, land use, geology, drainage density, road density distance and elevation. The method used in this research is the Analytical Hierarchy Process (AHP) method integrated with Geographic Information Systems (GIS). The purpose of this research is to determine how much each parameter contributes to flood risk and visualize the results in the form of flood-prone maps. The results in this study show that rainfall has the biggest cause of flood risk at 0.30, followed by slope 0.20, land use 0.13, elevation at 0.12, drainage density 0.09, geology 0.07, soil type 0.05, and distance between roads at 0.04. All parameters that have been analyzed, then weighted overlay into a flood-prone map. The mapping results show that North Luwu Regency has a moderate level of flood risk, with an area coverage of 3.813 km2 or 50,78% of the total area. As for the vulnerable level category, it covers an area of 17,48 km2 or 23,28%, and for the moderately vulnerable zone level category it covers an area of 1.939 km2 or 25,82% of the total area. 
Pengaruh Filter Lowpass Terhadap Kualitas Citra CT-Scan Paru-Paru Ulga, Sofhia; Muttaqin, Afdhal; Fitriyani, Dian
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.587-593.2024

Abstract

A low pass filter can be employed to enhance the quality of lung CT-Scan images by smoothing sharp transitions and reducing noise present in the images. The aim of this research is to implement a low pass filter by applying different weight values. The kernel weights applied in filtering using a low pass filter are 1/6, 1/9, 1/10, and 1/16. This study is a quantitative research employing 102 images. The findings of this study reveal that applying low pass filters with different kernel weights yields varying image qualities. Based on the quality tests of Mean Squared Error (MSE) and Peak Signal to Noise Ratio (PSNR), it was found that the kernel weight of 1/6 produces images with excellent quality at 17,65%, good quality at 28,93%, and fair quality at 53,92%. Meanwhile, with a kernel weight of the 1/9, 36,36% of the images were found to have good quality, while 64% exhibited lower quality. The application of a low pass filter with a kernel weight of 1/10 resulted in 39% of the images being of good quality and 61% of the images being of lower quality. At the kernel weight of 1/16, 2% of the images were obtained with excellent quality, 40% with good quality, and 58% with lower quality. Based on the MSE and PSNR test values, it was found that applying a kernel weight of 1/6 resulted in better image quality compared to applying other kernel weights. From the overall result, it was found that the application of a low pass filter was not suitable for improving the quality of CT-Scan images of the lung, so other methods could be applied to improve the quality of the images.
Studi Pengaruh Ketebalan Elektroda Karbon Aktif dari Kulit Buah Kakao terhadap Kinerja Elektrokimia Superkapasitor Dunnas, Irsya; Nasution, Widi Mulia; Muldarisnur, Mulda; Yetri, Yuli
Jurnal Fisika Unand Vol 13 No 4 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.4.594-601.2024

Abstract

Sintesis karbon aktif dari kulit kakao dengan variasi ketebalan elektroda 0,4; 0,5; dan 0,6 mm bertujuan untuk melihat pengaruhnya terhadap kinerja superkapasitor. Tebal elektroda yang berbeda diberi kode sampel yaitu tebal 0,4 mm dengan kode CC-0,4; tebal 0,5 dengan kode CC-0,5 mm dan tebal 0,6 mm dengan kode CC-0,6. Pembuatan elektroda karbon dari kulit kakao dilakukan dalam beberapa tahap yaitu pengeringan organik, prakarbonasi, aktivasi kimia menggunakan aktivator KOH 0,4 M dan pencetakan pelet menggunakan press hidrolik dengan tekanan 8 ton. Pelet yang telah dicetak dikarbonasi menggunakan gas N2 pada suhu 600 ⁰C dan aktivasi fisika menggunakan gas CO2 pada suhu 700 °C. Sifat elektrokimia dari sel superkapasitor ditinjau melalui sistem dua elektroda dalam elektrolit 1 M KOH. elektroda karbon aktif optimum yang diperoleh pada sampel CC-0,5 dengan kapasitansi spesifik yang tinggi  mencapai 366,67 F/g pada rapat arus 1,0 A/g. Rapat energi maksimum yang didapatkan sebesar 660 Wh/Kg pada rapat daya optimum 2378,39 W/Kg. Potensi kulit kakao sebagai sumber karbon aktif dengan ketebalan 0,5 mm menunjukan kinerja perangkat penyimpanan energi elektrokimia superkapasitor yang tinggi dan stabil dengan ketahanan bahan yang baik.

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