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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 14 Documents
 1   2 
Search results for , issue "Vol 14 No 2 (2025)" : 14 Documents clear
Sistem Monitoring Kualitas Udara Jarak Jauh Berbasis Sensor MQ-2, MQ-6 dan Sensor DHT11 Iqbal, Muhammad; Puspita, Nabilla Putri; Rasyid, Rahmad; Yusfi, Meqorry
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.14.2.137-144.2025

Abstract

Air quality is influenced by activities that produce gas from natural and human sources, so monitoring gas levels is important to prevent health threats. The goal is to create a natural gas monitoring tool that is efficient (easy to use) and can be accessed from a smartphone. The tool designed uses MQ-2 and MQ-6 sensors for detecting gas levels and DHT11 sensors for temperature and humidity. Data is sent in real-time on the smartphone via the Blynk application with the nRF24L01+ module. The results showed that the system worked well in monitoring butane, methane, temperature, and humidity. The highest error value on the MQ-2 sensor is 24.375%. Methane gas measurements using the MQ-6 sensor show the highest error value of 11.06%. The nRF24L01+ module successfully sends data to the receiver and activates the Light Emitting Diode (LED) and buzzer when the value exceeds the set limit. This module can send data up to a distance of 1000 meters without Line-of-Sight (LOS) obstructions and has a reduced distance of up to 600 meters in the presence of Non-Line-of-Sight (NLOS) obstructions. The Blynk application successfully displays data measuring gas levels, temperature and humidity.
Pengaruh Konsentrasi Larutan Asam Sitrat terhadap Sifat Elektroda Lapisan Ganda pada Pengukuran Spektroskopi Impedansi Adelia, Kadek Ayu Cintya; Kurniati, Ety; Kustyanto, Deny
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.14.2.131-136.2025

Abstract

Research on biological materials using dielectric materials has been widely conducted, but currently there are not many studies using electrolyte materials/solutions. The purpose of this study is to determine the relationship between solution concentration and solution impedance value, as well as the relationship between frequency and solution impedance value. This study uses the electrochemical impedance spectroscopy (EIS) technique in Citric Acid (C6H8O7) solution. The results of the study obtained indicate that the impedance value is a complex number with a real part (Z') and an imaginary part (Z''). The impedance value (Z') can be distinguished well in the frequency range of 100 Hz - 1 kHz with a concentration variation of 17.10-5 M -85.10-5 M. At low frequencies, the effect of concentration on the impedance value (Z') cannot be distinguished well, but at high frequencies, the effect of solution concentration on the impedance value can be distinguished well. In the frequency range >100 kHz, the impedance value cannot be distinguished well because the device becomes less sensitive to changes in frequency. This study shows that electrochemical impedance spectroscopy can be used to study the effects of concentration and frequency on the properties of double layers in citric acid solutions.
Rancang Bangun Sistem Pemantauan Pergeseran dan Kelembapan Tanah Berbasis Telemetri Nurrokhnim, Muh. Hamzah Tsalis; Andi, Andi; Rakhmadi, Frida Agung
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.14.2.110-116.2025

Abstract

A monitoring system for soil movement and moisture using MPU6050 accelerometer sensor and soil moisture sensor has been designed. Changes in acceleration and humidity around the sensor cause changes in the capacitance value of each sensor. The change in capacitance from each sensor is then processed by the microcontroller contained in the Arduino UNO R3 with the Arduino IDE programming language to produce acceleration and humidity data. Data is sent via Radio signal contained in the nRF24L01+ module every 1.2 seconds. The test results show a precision value for acceleration of 95.24% on the X axis, 95.11% on the Y axis, 99.86% on the Z axis and a precision value for humidity measurement of 100%. The test results show that the soil movement and moisture monitoring system can work well and the data sent via radio waves is successful and applicable.
SISTEM MONITORING KEKERUHAN AIR MENGGUNAKAN SENSOR TURBIDITY DAN TRANCEIVER LORA EBYTE E220 PADA PENYEDIAAN AIR MINUM DAN SANITASI MASYARAKAT (PAMSIMAS) Jannah, Wardatul; 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.14.2.103-109.2025

Abstract

water turbidity monitoring system has been created using a turbidity sensor and LoRa Ebyte E220 transceiver for the provision of drinking water and community sanitation (PAMSIMAS). The tool designed in this research uses two LoRa Ebyte E220 transceivers, one functions as a transmitter (sender), and the other functions as a receiver (receiver). The sending unit is equipped with a SEN0189 turbidity sensor to detect water turbidity levels, as well as a NodeMCU ESP8266 as a data processor and sender. The receiving unit is equipped with a NodeMCU ESP8266 as a data processor, an LCD to display the results of monitoring turbidity levels, and a buzzer as an alarm that sounds if the water turbidity exceeds a certain threshold. The webserver used is ThingSpeak. The research results show that the system is capable of transmitting water turbidity level data through the air by the Ebyte E220 LoRa transceiver. The SEN0189turbidity sensor system has an average error percentage of 7.6%. This error can be caused by several factors, including the sensor's sensitivity to changes in light intensity, variations in impurity particles in the water, and the sensor's inability to distinguish the types of particles present in the water. LoRa transceivers can transmit data when there is a barrier up to 800 m, while without a barrier it reaches 2000 m. The values obtained from the sensors are displayed on the LCD and ThingSpeak.
Litologi Daerah Rawan Banjir Di Desa Batik Nau Dengan Menggunakan Metode Vertical Electric Sounding (VES) Barasa, Habel; Suhendra, Suhendra; Gustan, Nesti Fazeza; Halauddin, Halauddin
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.14.2.117-123.2025

Abstract

This study was conducted to determine the type of rock lithology in Batik Nau village to see its effect on flooding during the rainy season. The study was conducted using the Schlumberger Configuration with the Vertical Electrical Sounding (VES) method at 30 sounding points. VES data collection in this study used the X612-EM MULTI-CHANNEL RESISTIVIMETER. Furthermore, to obtain a 1D log image, Progress 3.0 software was used and then analyzed to be interpreted against the geological map of the research area. The rock porosity value was obtained using the Achi formula using Microsoft Excel software. The results of the interpretation that most of the Batik Nau Village area is dominated by Clay and Napal rocks, both rocks have very low average porosity values ​​so that they are saturated with water. Rock lithology that cannot absorb water perfectly or is in a state of saturation makes this area prone to flooding during the rainy season.
Sintesis dan Karakterisasi Silika Sekam Padi sebagai Material Self-Cleaning Elsandika, Gabriela; Dirgantara, Made; Beladona, Siti Unvaresi Misonia; Pasaribu, Marvin Horale
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.14.2.124-130.2025

Abstract

This study aimed to valorize rice husk waste by extracting silica and developing a self-cleaning surface coating. Silica was successfully extracted from rice husk ash via an alkaline reflux method followed by acid precipitation. The extracted silica exhibited an amorphous structure with a high purity of 96.7%, as confirmed by X-ray diffraction (XRD) and X-ray fluorescence (XRF) analysis. Subsequent modification with Trimethylchlorosilane (TMCS) significantly enhanced the hydrophobicity of the silica, resulting in a contact angle of 99.84° with water. The synthesized silica-based material demonstrates promising potential as a self-cleaning surface coating, offering improved durability and ease of maintenance.
Optimasi Parameter PID Pada Sistem Kontrol Suhu Alat Roasting Biji Kopi Dewi Anggraeni; Saputra, Aditya Ilham; Sakti, Setyawan Purnomo
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.14.2.145-151.2025

Abstract

Coffee is an important commodity for Indonesia. This huge potential must be utilized optimally. One of the important stages in processing coffee beans is the process of roasting coffee beans. This research focuses on optimizing PID control parameters on coffee bean roasting equipment. The main stages in determining PID control parameters are carried out using MATLAB's PID Tuner and also the process of improving the parameter values. From this research it can be concluded that the PID parameters to improve the temperature control performance of coffee roasting equipment, in the temperature ranges of 210 °C, 215 °C, 220 °C, 225 °C, and 230 °C indicate that the PID parameters have been improved (Kp = 5, Ki = 0.017, and Kd = 2) has better performance compared to parameters obtained directly from PID Tuner Matlab (Kp = 33.4, Ki = 1, and Kd = 4.74). Parameters that have gone through the refinement process show a fairly fast rise time (123 seconds), small overshoot (2.8 °C) and no significant oscillations occur in the system. Thus, it can be concluded that the use of refined PID parameters is more optimal for controlling temperature in coffee bean roasting equipment, because it produces a better system response. By improving the PID parameter values, it is hoped that it can produce roasted coffee beans with accurate variations in maturity levels, so that users can determine the desired taste and aroma characteristics of coffee based on the maturity level.
Efek Penambahan Plutonium pada Sel Bahan Bakar MOX terhadap Performa Reaktor GFR 250MWth Muhammad Aldi Kurniawan; Menik Ariani; Monado, Fiber; Johan, Akmal; Kaban, Hadir
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.14.2.152-159.2025

Abstract

A fast-type reactor that operates on high-speed neutrons, GFR (Gas-cooled Fast Reactor) can produce various fissile materials and fertilizers. This production capability is very beneficial for the stability of nuclear fuel in the reactor core, especially reactors that use closed cycles such as GFR. Plutonium (Pu) from the residue from burning reactors such as PWR or LWR can be used as a mixed fuel to increase fissile nuclides in MOX fuel. MOX (Mixed Oxide) is a mixture of uranium (U) and plutonium (Pu) in certain amounts. The composition of plutonium (Pu) in MOX greatly influences the level of fuel combustion in the core at the start of operation. The research aims to vary the percentage of plutonium (Pu) to enable design adjustments to maximize fuel use efficiency. Simulations were conducted computationally to determine the performance of each percentage of Pu used in MOX. Depletion calculations were carried out for 10 years using the OpenMC code and ENDF/B VIII.0 nuclear data. The research results show that the best design performance is at a Pu percentage of 11% which is determined based on the range of effective multiplication factor (keff ) values and excess reactivity and is in line with expectations.
Analisis Reaktivitas Thorium Molten Salt Reactor 500 Berdasarkan Skenario Penggunaan Control Rod Menggunakan OpenMC Eza Pelita Zebua, Fajri; Handayani Irka, Feriska; Raflis, Helen; Fardela, Ramacos; Fitriyani, Dian
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.14.2.167-176.2025

Abstract

Neutron calculation simulation with the TMSR-500 conceptual reactor model was carried out for the development of reactivity control in the reactor. The control of reactivity is regulated by the use of a control rod for the shutdown rod and a regulating rod on the reactor. The simulation was carried out using OpenMC computational code and the nuclear data ENDF/B-VII.1. The reactivity value is calculated based on the use scenario of the control rod for each reactor operating condition set with a reactivity margin limit of ≤ 5% dk/k to control reactivity during operation and ≤ 0,5% dk/k during shutdown. The simulation of reactivity control during operation was calculated based on the use scenario of 0% Gd2O3-100% graphite, 25% Gd2O3-75% graphite, 50% Gd2O3-50% graphite, 75% Gd2O3-25% graphite, and 100% Gd2O3-0% graphite. Then, in the shutdown condition, the scenario is set with the use of control rods by Gd2O3 and graphite. The simulation results show that the reactor has an excess reactivity of >5% dk/k. The Control Safety Device (CSD) simulation is able to suppress reactivity ≤ 5% dk/k, but the flux distribution is unevenly distributed. The results of the calculation on the optimization the reactor by the fuel radius with the scenario of using a control rod of 25% graphite-75% Gd2O3 succeeded in controlling the reactivity with a margin of 1,0111±0,00013 (0,108% dk/k). Based on the research, the criticality level of the TMSR 500 is determined by the optimization of the fuel radius and the reactivity can be controlled based on the use scenario of the control rod.
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.

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