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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 1,782 Documents
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Analisis Keluaran Berkas Radiasi Sinar-X pada Pesawat Linear Accelerator (LINAC) Berdasarkan TRS 398 IAEA di RSUD Arifin Achmad Provinsi Riau Cahyaningtyas, Saphira Indah; Anggraini, Rista Mutia; Fendriani, Yoza
Jurnal Fisika Unand Vol 13 No 2 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.2.282-289.2024

Abstract

Telah dilakukan penelitian tentang analisis keluaran berkas radiasi sinar-X pada pesawat Linear Accelerator (Linac). Analisis ini bertujuan untuk mengetahui keluaran berkas radiasi pada pesawat Linac menunjukkan nilai 1 cGy atau sama dengan 1 MU, yang diperoleh dari analisis ionisasi chamber, suhu, tekanan, efek polaritas, dan rekombinasi ion. Penelitian ini dilakukan menggunakan energi foton sebesar 6 MV dan energi elektron dengan variasi (4, 6, 8, 10, 12, dan 15) MeV. Luas lapangan yang digunakan yaitu 10 cm x 10 cm serta source to surface distance (SSD) 100 cm. Hasil analisis menunjukkan berkas energi foton 6 MV didapatkan nilai keluaran per 1 MU sebesar 1,0046 cGy/MU dengan deviasi 0,46%. Sedangkan pada berkas elektron energi 4 MeV sebesar 1,0112 cGy/MU dengan deviasi 1,12%, energi 6 MeV sebesar 1,0064 cGy/MU dengan deviasi 0,64%, energi 8 MeV sebesar 0,9991 cGy/MU dengan deviasi 0,09%, energi 10 MeV sebesar 0,9987 cGy/MU dengan  deviasi 0,13%, energi 12 MeV sebesar 0,9978 dengan deviasi 0,22% dan energi 15 MeV sebesar 1,0013 cGy/MU dengan deviasi 0,13%. Dalam hal ini keluaran berkas radiasi sinar-X pada pesawat Linac (Linear Accelerator) di RSUD Arifin Achmad Provinsi Riau telah sesuai dengan standar TRS 398 IAEA dengan rentang deviasi pengukuran yaitu ±3%.
Analisis Korelasi Umur, Massa Tubuh dan Faktor Eksposi Terhadap Entrance Surface Air Kerma pada Pemeriksaan Thorax di Rumah Sakit Universitas Andalas Sari, Suci Indah; Milvita, Dian; Fardela, Ramacos; Pratama, Ida Bagus Gede Putra; S, Amel Oktavia
Jurnal Fisika Unand Vol 13 No 5 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.5.602-609.2024

Abstract

Research has been conducted on the correlation analysis of age, body mass, and exposure factors to Entrance Surface Air Kerma (ESAK) in the Radiology Installation of Andalas University Hospital. The study was conducted by collecting data on adult thorax examination patients over 15 years of age and body mass (60 ± 10) kg in Posterior-Anterior (PA) and Anterior-Posterior (AP) projections for ± 5 months. Patient data used in PA projections are 107 patient data with the Automatic Exposure Control (AEC) method, 9 patient data with manual methods and 10 AP projection patient data with manual methods. Analysis was conducted using the Pearson correlation test. The results showed that body mass and exposure factors have a very strong relationship with ESAK as indicated by r = 0.805 to 0.990. As body mass and exposure factor increase, the average ESAK received by patients will increase, while age has a weak relationship with ESAK as shown by r = -0,246 to 0,227.
Sistem Monitoring Suhu dan Kadar Air pada Mesin Pengering Padi Berbasis Internet of Things Syaifurrahman, Syaifurrahman; Hiendro, Ayong; Aula, Abqori
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.13.4.483-489.2024

Abstract

Paddy drying is an activity to remove the excess of water content within paddy to achieve a better rice quality during the grinding process. Farmers often determine water level based on experience, such as biting the rice, if the skin breaks, it means the rice is ready to be grinded. This research examines a monitoring system on a paddy drying machine in order to obtain a higher quality paddy to be made into rice. On the machine, there is a hearing element to raise the temperature of the drying tank. The rise of the temperature of the drying tank must be monitored to maintain that the temperature is always within the pre-determined threshold. The monitoring system uses DHT11 and SEN0308 sensors connected to ESP32 module as data processing center, before being displayed on an LCD indicator or a smart phone. Accuracy Test results for sensors show both sensor readings are above 90%. The temperature and water level data of the paddy during the drying process can be seen live on an LCD indicator or a smart phone as an accurate information.
Indeks Kerentanan Seismik Menggunakan Data Mikrotremor untuk Daerah Perbukitan dan Pemukiman di Bukit Nobita Kota Padang Anjelina, Fani; Pohan, Ahmad Fauzi
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.13.4.511-517.2024

Abstract

Research on the seismic vulnerability index on Nobita Hill, Padang City uses the microtremor method. The study was conducted in two areas, namely hilly and residential areas around Nobita Hill. Measurements were carried out using a geophone with three components, a north-south horizontal component, an east-west horizontal component and an up-down vertical component at 7 points in hilly areas and 9 points in residential areas with a recording duration of 30 minutes. The measurement results were then processed using the Horizontal Vertical Spectral Ratio (HVSR) method using Geopsy software and mapped using Surfer 11. The research results show that the Nobita Hill area and the settlements around the hill are not vulnerable to seismicity because both research areas have a small category of seismic vulnerability index. This is characterized by dominant frequency values in the hills ranging from 0.633 - 0.935 Hz, amplification from 0.905 - 1.306, and seismic vulnerability index from 1.234 - 2.622. In residential areas, dominant frequency values were found ranging from 0.645 - 2.983 Hz, amplification from 1.109 - 1.316, and seismic vulnerability index from 0.438 - 1.974. This indicates that both studies are safe in the event of an earthquake. 
Rancang Bangun Alat Ukur Kadar Air dan Keasaman untuk Mengetahui Kualitas Madu Berbasis Mikrokontroler Saputra, Taufik; Firmawati, Nini
Jurnal Fisika Unand Vol 13 No 6 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.6.749-755.2024

Abstract

Honey is a naturally sweet substance produced by honeybees from the nectar of flowers. The composition of honey is so complex that the benefits of honey in the pharmaceutical, food, beverage and aesthetic industries are enormous. One of the quality parameters of honey is the level of moisture and acidity. This research aims to analyse the quality of honey based on moisture content and acidity. To test this, a tool is needed that can detect moisture content and acidity in honey. The design of a tool to measure moisture content and acidity to determine the quality of honey using capacitive soil moisture sensor and pH sensor has been made. The testing of the tool is done with 3 variations of honey samples available in the market. The test results of 3 honey samples with the designed tool were compared with the pH meter and Brix refractometer. The percentage error obtained in testing the designed tool is 12.5% for moisture content and 3.89% for acidity. Based on the research results, it is found that the designed tool can read the value of water content and acidity in each honey sample.
SUSEPTIBILITAS MAGNETIK TANAH SEBAGAI INDIKATOR TANAH LONGSOR DI DAERAH MALAMPAH KABUPATEN PASAMAN Fitriah, Rahmatul; Afdal, Afdal
Jurnal Fisika Unand Vol 13 No 5 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.5.697-703.2024

Abstract

Soil magnetic susceptibility values have been measured in the Malampah area of Pasaman Regency using the rock magnetism method. Samples were taken from two areas where landslides had occurred and two areas where landslides had not occurred. Samples were taken at the top, middle, and bottom with 5 cm, 25 cm, and 50 cm depth variations. Measurement of soil magnetic susceptibility value was conducted using Bartington Susceptibility Meter MS2B. The results showed that the magnetic susceptibility value at low frequency (ꭓLF) at each sampling point is higher than the high-frequency magnetic susceptibility value (ꭓHF). Indicating that the research location contains superparamagnetic grains. From the range of ꭓLF values obtained, it is estimated that the magnetic minerals that control the samples are paramagnetic and ferromagnetic and the mineral type is estimated to be ilmenite (FeTiO3). Areas where landslides have occurred have a higher ꭓFD (%) value than areas where landslides have not occurred. The higher the ꭓFD (%) value, the more superparamagnetic grains will be in the sample. Superparamagnetic grains are smooth and easily absorb water. Adding soil mass due to water causes the soil to move quickly when on a slope.
Sintesis Reduced Graphene Oxide dari Limbah Biomassa Serabut Kelapa Sawit dengan Metode Microwave Kristanti, Dona Avrilia; Marzuqi, Muhammad Hilmi; Putriana, Ima; Suprihatin, Suprihatin; Fauziyah, Nur Aini
Jurnal Fisika Unand Vol 13 No 3 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.3.392-398.2024

Abstract

Pada penelitian ini membahas tentang pembuatan Reduced Graphene Oxide (rGO) dengan memanfaatkan limbah serabut kelapa sawit dari Aceh. Serabut kelapa sawit termasuk biomassa lignoselulosa berupa serat yang memiliki komponen utama selulosa 59,6%, lignin 28,5%, protein kasar 3,6%, lemak 1,9%, abu 5,6% dan impurities 8%. Metode yang digunakan dalam preparasi rGO adalah metode microwave. Sampel yang telah mendapat perlakuan microwave kemudian dikarakterisasi menggunakan XRD dan SEM untuk mengetahui fasa amorf dan morfologi dari sampel. Pada analisis XRD diperoleh hasil bahwa reduce graphene oxide memiliki fase amorf yang lebih dominan. Kemudian, pada analisis SEM diperoleh hasil bahwa GO dan rGO memiliki perbedaan morfologi pada permukaan sampel, dimana rGO memiliki bentuk lembaran yang lebih tipis daripada GO. Pada penelitian ini dapat diambil kesimpulan bahwa sintesis rGO yang telah dilakukan menggunakan serabut kelapa sawit dengan metode microwave belum sepenuhnya berhasil, dimana masih terdapat kandungan Graphene Oxide (GO) yang tidak tereduksi sempurna menjadi Reduced Graphene Oxide (rGO).
Identifikasi Bidang Gelincir Menggunakan Metode Geolistrik Resistivitas Konfigurasi Wenner-Schlumberger (Studi kasus: Puncak Panorama Mandeh Nagari Setara Nanggalo, Kabupaten Pesisir Selatan) Salsabila, Salsabila; Afdal, Afdal
Jurnal Fisika Unand Vol 13 No 3 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.3.365-371.2024

Abstract

Telah dilakukan penelitian untuk mengidentifikasi bidang gelincir di Kawasan Puncak Panorama Mandeh, Kabupaten Pesisir Selatan menggunakan Metode Geolistrik Resistivitas Konfigurasi Wenner-Schlumberger. Pengambilan data dilakukan pada 2 lintasan dengan panjang masing-masing lintasan 80 m dengan spasi elektroda terpendek 5 m dan terpanjang 80 m. Daerah penelitian ini merupakan jalan alternatif yang menghubungkan antara Kota Padang dan Kabupaten Pesisir Selatan dengan topografi berbukit-bukit dan memiliki potensi terjadi gerakan tanah tinggi (PGTT). Pemodelan dilakukan menggunakan software Res2DInv untuk menampilkan model penampang dua dimensi lapisan di bawah permukaan berdasarkan nilai resistivitas. Hasil penelitian memperlihatkan bahwa bidang gelincir pada masing-masing lintasan merupakan batu serpih. Bidang gelincir pada Lintasan 1 berada pada kedalaman 3,75 m – 15,90 m dan ketebalan diperkirakan 3 meter. Sedangkan pada Lintasan 2 berada pada kedalaman 4,00 m – 9,26 m dan perkiraan ketebalan 3 m.
Pengaruh pH dan CTAB (Cetyl Trimethyl Ammonium Bromida) terhadap Morfologi Silika Iqbal, Mohammad; Dewa, Krisna Kumara; Dyah, Meiska; Suprihatin, Suprihatin; Fauziyah, Nur Aini
Jurnal Fisika Unand Vol 13 No 3 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.3.433-438.2024

Abstract

Pada penelitian ini membahas terkait pengaruh penambahan pH dan CTAB (Cetyl Trimethyl Ammonium Bromida) terhadap morfologi silika dari abu vulkanik. Abu vulkanik memiliki kandungan silika yang cukup tinggi. Metode yang digunakan dalam pembuatan silika adalah kopresipitasi. Kemudian, silika dilakukan analisis XRD, SEM, dan FIIR untuk mengetahui fase, morfologi pada sampel, dan gugus fungsi. Pada analisis XRD diperoleh hasil bahwa silika memiliki fase amorf yang lebih dominan. Dikarenakan material awal yang digunakan merupakan abu vulkanik yang berbentuk amorf sehingga silika (SiO2) yang dihasilkan juga akan berbentuk amorf. Pada analisis SEM terhadap silika (SiO2) menunjukkan morfologi permukaan pada sampel, dimana silika (SiO2) memiliki bentuk mesoporous. Hasil dari penelitian ini mendapatkan ukuran partikel terkecil yaitu 27,3174 nm sedangkan yang terbesar yaitu 103,5214 nm. pH dan Cetyl Trimethyl Ammonium Bromida (CTAB) berpengaruh terhadap struktur kristal dan ukuran partikel silika yang didapatkan. Sedangkan pada analisis FTIR ditandai dengan adanya gugus fungsi  Si – O – Si dengan rentang panjang gelombang 1000 – 1115 cm-1 .
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. 

Page 165 of 179 | Total Record : 1782

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