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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 1,804 Documents
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Analisis Spatiotemporal Dinamika Garis Pantai Dan Pemetaan Zona Bahaya Tsunami Di Kota Padang Menggunakan Penginderaan Jauh dan Sistem Informasi Geografis Musra, Faizah; Namigo, Elistia Liza
Jurnal Fisika Unand Vol 15 No 2 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.2.132-139.2026

Abstract

The city of Padang is one of Indonesia's coastal areas that is highly vulnerable to tsunamis due to its location directly facing the Mentawai–Sumatra megathrust subduction zone. This study aims to analyze coastal dynamics using multitemporal satellite imagery and examine its relationship with tsunami hazard zoning based on the physical characteristics of the area. The methodology includes digitizing the coastline for 2013 and 2025, analyzing the rate of coastline change using the Digital Shoreline Analysis System (DSAS), and combining spatial parameters such as elevation, slope, distance from the coastline, and proximity to rivers to produce a tsunami hazard zone map. Overlay analysis indicates that areas with low elevation, gentle slopes, and proximity to river mouths and coastlines fall into the category of high tsunami vulnerability. The results of the study show spatial variations in coastal dynamics in Padang City, with significant abrasion observed in Koto Tangah District (-1.754 m/year) and Padang Selatan (-1.051 m/year), while notable accretion was recorded in Bungus Teluk Kabung (+1.470 m/year). This study proves that the integration of remote sensing data and Geographic Information Systems (GIS) provides a comprehensive spatial framework to support coastal disaster mitigation efforts and risk-based spatial planning.
Analisis Efektivitas Filtrasi Sederhana terhadap Kualitas Fisik-Kimia Air Sumur Bor dan Sungai Kahayan untuk Mitigasi Dampak Lingkungan Iashania, Yunida; Agustiani , Reni; Fridtriyanda, Asri; Waruwu, Valentinus; Enzelina Silaban, Yunita
Jurnal Fisika Unand Vol 15 No 2 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.2.140-146.2026

Abstract

The purpose of this study was to determine the effectiveness of the filter before and after filtration so that the water complies with water quality standards. The research method used a quantitative method with a field and laboratory experimental approach to test changes in air quality after going through a filtration process using a simple system designed. Based on research obtained from the laboratory, there was an increase in the effectiveness of well water quality of 95.65%, dissolved manganese (mn) of 83.87%, the color looked clearer with an increase of 68.47%, dissolved iron (Fe) of 14.63%, air acidity (pH) of 7.16%, nitrite (NO2) of 1.43%. While for river water the TSS value was 40.82%, dissolved oxygen (DO) of 121.03%, chemical oxygen demand (COD) of 14.16%, biological oxygen demand (BOD) of 12.82% and an increase in pH of 4.17%. The filter designed in this study is effective for use in water wells because it is able to filter and improve the quality of groundwater because it complies with water quality standards, namely PP No. 22 of 2021, while for river water it is still less effective in addressing air quality, especially in TSS and BOD values.
Optimalisasi Potensi Limbah Alat Gelas sebagai Adsorben Limbah Logam Berat Fe, Cd, Pb dan Mn Skala Laboratorium Gusthia, Melisa Weno; Nurmi, Fatiyah Aghni Yati; Rahmatunisa, Sefina; Muldarisnur, Mulda
Jurnal Fisika Unand Vol 15 No 2 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.2.125-131.2026

Abstract

Chemical laboratory activities produce liquid waste containing hazardous materials, including heavy metals such as Fe, Cd, Pb, and Mn, which have the potential to pollute the environment if not managed properly. This study aims to optimize the use of laboratory glassware waste as an environmentally friendly alternative adsorbent to reduce heavy metal levels in laboratory-scale liquid waste. The research stages include collecting glassware waste from various laboratories, grinding, sieving, and activating the adsorbent through chemical treatment (HNO₃ and HCl-HNO₃), drying, calcination, and adding NaOH to open the adsorbent pores. Material characterization was carried out using SEM, FTIR, and BET to observe the morphology and surface area of the pores. Initial results showed that the three-stage activation was able to improve the quality of the adsorbent pores so that it was ready for use in the adsorption process. In the next stage, heavy metal adsorption tests were carried out with variations in time and mass of the adsorbent, then analyzed using Flame AAS and re-characterized with SEM-EDX, FTIR, and BET. The results using FTIR can be proven that the adsorbent contains SiO2 compounds that have the potential to have pores due to the structure of the compound. The results of the BET characterization obtained a surface area value of 0, which proves that the adsorbent has a very small pore size, also called micropores. The results of Flame AAS measurements show that the adsorbent is able to adsorb heavy metals with an adsorption percentage above 85%.
Identification Of Subsurface Lithological Units Using Electrical Resistivity Modelling In A Landslide-Prone Area Of Dlingo, Bantul, Yogyakarta Rahmawati Fitrianingtyas; Amri, Chairul; Khafidh Nur Aziz; Hilma Lutfiana; Rial Dwi Martasari; Uli Ulfa
Jurnal Fisika Unand Vol 15 No 2 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.2.155-163.2026

Abstract

The Dlingo area in Bantul Regency, Yogyakarta, is characterized by steep slopes and volcanic deposits that contribute to high landslide susceptibility, as evidenced by destructive events in 2021. This study aims to characterize subsurface conditions controlling slope instability using electrical resistivity modeling. Geoelectric data were acquired using the Wenner configuration along four survey lines, consisting of three slope-parallel profiles and one slope-perpendicular profile, each 225 m long with 15 m electrode spacing. Apparent resistivity data were processed and inverted using Res2Dinv to generate two-dimensional (2D) resistivity sections. The results consistently reveal three principal resistivity zones across all profiles: (1) a high-resistivity unit (approximately 33,9–642 Ωm) interpreted as relatively compact to slightly weathered tuff, (2) a moderate-resistivity layer (1.79–33.9 Ωm) corresponding to weathered volcanic deposits, and (3) a low-resistivity zone (<1.79 Ωm) interpreted as water-saturated or highly conductive material developed along the lower slope. The recurrent resistivity contrast between the weathered layer and the underlying conductive zone suggests a hydrogeological boundary that may facilitate pore-water accumulation and contribute to slope instability. These findings provide a geophysically constrained conceptual model of subsurface controls on slope instability in volcanic terrains.
Stabilisasi Sterik Polimer Non-Ionik Tween 80 pada Nanopartikel Senyawa Bioaktif Buah Kapulaga Saragih, Horasdia
Jurnal Fisika Unand Vol 15 No 2 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.2.164-173.2026

Abstract

The bioactive compounds in cardamom fruit are highly beneficial to health, as they possess anticancer, antioxidant, antibacterial, anti-inflammatory, and antibiotic properties. Therefore, they have great potential to be developed as oral medicines in the future. However, they are highly hydrophobic and consequently insoluble in water. This poses an obstacle to their development. To overcome this problem, bioactive compounds from cardamom fruit have been synthesized into nanometer-sized particles (13.13-19.75 nm) and encapsulated with the nonionic polymer surfactant Tween 80. The results show that Tween 80 surfactant not only acts as an encapsulant for nanoparticles so that they can be dispersed in an aqueous medium, but also acts as a steric stabilizer so that the nanoparticles can remain stable for a long time. Four concentrations of bioactive compounds from cardamom fruit were used, namely: 6, 8, 10, and 12 mg to observe their effect on size stability. All nanoparticles produced from the four concentrations had excellent size stability.
Development of an Integrated Artificial Intelligence Model for Bottle Inspection Using Geometric Feature Extraction and ROI-Based Statistical Analysis Dewi Anggraeni; Santoso, Rikho Adi; Naba, Agus; Sakti, Setyawan Purnomo; Rianto, Sugeng
Jurnal Fisika Unand Vol 15 No 2 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.2.147-154.2026

Abstract

In the era of Industry 4.0, the demand for manufacturing systems that are fast, precise, and efficient has become increasingly urgent. This drives the adoption of artificial intelligence (AI) technologies as a promising solution, including in the field of automatic bottle sorting. However, many industries still use manual bottle sorting systems, which often have significant drawbacks. This study presents an integrated artificial intelligence (AI)-based inspection model for automated bottle inspection in the context of smart manufacturing. The proposed approach integrates geometric feature extraction with region-of-interest (ROI)-based statistical image analysis to improve classification accuracy and robustness. Geometric features extracted from bottle contours are combined with optimized ROI selection to enhance feature relevance prior to classification using a Random Forest algorithm. The dataset consists of four bottle types: plastic, glass, cans, and cardboard, captured under controlled imaging conditions. Experimental results show that the proposed integrated method achieves classification accuracy ranging from 96% to 97.72%. The findings confirm that ROI optimization significantly influences statistical feature characteristics and improves overall model performance. This integrated framework is suitable for implementation in automated visual inspection systems supporting Industry 4.0 applications.
Analisis Struktur Hidroksiapatit Berbasis Cangkang Telur Ayam dengan Variasi Suhu Kalsinasi Permatasari, Ayunda Wulan; Nailul Hasan; Nur Aini Fauziyah; Allif Rosyidy Hilmi
Jurnal Fisika Unand Vol 15 No 2 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.2.188-196.2026

Abstract

The purpose of this study is to understand how color changes occur during the calcination heating process at different temperatures in the formation of hydroxyapatite. The synthesis process began with the calcination of CaCO_3 to CaO at temperatures of 800°C, 900°C, and 1000°C for four hours, followed by the formation of hydroxyapatite thru the calcination process of eggshell samples at temperatures of 800°C and 1000°C for 3 hours. To determine the hydroxyapatite content in the sample, characterization was performed using XRD diffraction patterns to identify the phase. XRD analysis was conducted using match2 software. Morphological analysis of hydroxyapatite was performed using SEM characterization. The analysis results indicate that there are still impurities present at temperatures of 800-800°C. The higher the calcination temperature, the greater the purity of the resulting hydroxyapatite.
Penentuan Konsentrasi Radionuklida Alam Di Kawasan Terdampak Banjir Lahar Dingin Gunung Marapi Sumatera Barat Afriani, Novi; Fardela, Ramacos; Iskandar, Dadong; Kusdiana; Wahyudi
Jurnal Fisika Unand Vol 15 No 2 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.2.197-203.2026

Abstract

Research has been carried out to determine the activity concentrations of radionuclides Ra-226 (Radium-226), Th-232 (Thorium-232), and K-40 (Potassium-40) in the Bukik Batabuah area, West Sumatra. The main objective of this research was to compare radionuclide levels in soils affected by cold lava floods with those exposed only to volcanic ash, and to assess whether the cold lava flow contributed to increased radionuclide concentrations. Measurements were performed using an HPGe (High Purity Germanium) gamma spectrometer. Soil samples were collected from six locations impacted by the cold lava flow and from three locations affected by ash from the Mount Marapi eruption. The results indicated that Ra-226, Th-232, and K-40 were detected in all samples. The average activity concentrations in soil affected by the cold lava flow were 14.92 ± 0.62 Bq/kg for Ra-226, 18.37 ± 0.83 Bq/kg for Th-232, and 342.15 ± 7.85 Bq/kg for K-40. In contrast, soils not affected by the cold lava flow showed average values of 10.99 ± 0.62 Bq/kg for Ra-226, 22.34 ± 1.03 Bq/kg for Th232, and 191.68 ± 5.06 Bq/kg for K-40. A t-test statistical analysis indicated significant differences between the two groups of samples. Based on PERKA BAPETEN No. 9 of 2009, the measured activity concentrations in soils around the foothills of Mount Marapi remain below the regulatory limits established by BAPETEN.
Effect of Electrokinetic Remediation on the Distribution and Concentration of Lead (Pb) in Ex-Mining Land of PT Semen Baturaja Tbk Komariah, Rahma Nur; Alfajrin, Achmad Chalid Afif; Aisyara, Arien; Halid, Muhammad Akmal; Simatupang, Lamtongam; Ghifari, Hamzah Daffa; Prasetia, Hendra; Widiatama, Angga Jati; Sabar, Sabar; Pesma, Rhahmi Adni; Hendrawan, Rezki Naufan; Hastito, Fadli
Jurnal Fisika Unand Vol 15 No 2 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.2.211-220.2026

Abstract

Mining activities can lead to the accumulation of heavy metals in soil, particularly lead (Pb), which poses risks to ecosystems and human health. PT Semen Baturaja Tbk has implemented revegetation as a post-mining reclamation strategy, but the success rate remains low, potentially due to high Pb concentrations in the soil. This study investigates the effectiveness of electrokinetic remediation in mobilizing Pb ions in ex-mining soil using aluminum electrodes under a 20 V direct current over treatment durations of 24 and 48 hours. Soil moisture was maintained at 900 ml, and Pb concentrations were measured using X-Ray Fluorescence (XRF). The results indicate that Pb²⁺ ions migrated towards the cathode, with a significant accumulation observed after 48 hours. However, an increase in Pb concentration near the anode was also detected, likely due to Pb oxidation at the anode plate, leading to remobilization of Pb into the soil. These findings highlight both the potential and limitations of electrokinetic remediation for in-situ heavy metal removal in post-mining land reclamation.
Evaluasi Kinerja LINAC Clinac CX Menggunakan Parameter PDD dan Profile Dose pada Lapangan Radiasi Simetri dan Asimetri di Rumah Sakit Universitas Andalas Zahara, Susi; Adrial, Rico; Milvita, Dian; Diyona, Fiqi
Jurnal Fisika Unand Vol 15 No 2 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.2.229-235.2026

Abstract

This study aims to obtain Quality Control information on the quality of the photon beam and radiation field used for the maximum depth value (Zmak) from the results of Percentage Depth Dose measurements as well as the symmetry and flatness values ​​from the results of profile dose measurements using symmetric and asymmetric radiation fields of (10x10) cm2 and (15x15) cm2 with AAPM TG-40 standards. The results of Quality Control carried out on the LINAC show that the greater the photon beam energy and the area of ​​the field given, the greater the maximum depth value (Zmak) obtained. In the profile dose measurement, the largest symmetry value was obtained in the 1 cm offset section of 2.8% for 6 MV energy using the (10x10) cm2 field and the largest flatness value in the 3 cm off-set section of 1.9% while for 10 MV energy the largest symmetry value in the 3 cm off-set section was 4.3% and the largest flatness value in the 1 cm off-set section was 2.3%. In the field area (15x15) cm2, the largest symmetry values ​​of 6 MV and 10 MV energy were obtained at the 3 cm off-set section of 3.7% and 4.3%, and the largest flatness values ​​of 6 MV and 10 MV energy were found at the 3 cm off-set section of 2.3% and 2.1%. Therefore, the symmetry and asymmetry fields (1 cm off-set) on the LINAC are reliable enough to be used in cancer therapy treatment.

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