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All Journal International Journal of Electrical and Computer Engineering Jurnal Fisika Unand Indonesian Journal of Physics (IJP)
Aminah, Nina Siti
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Astronomy Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Physics

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Development of twig dryness sensor for internet of things-based peatland fire early detection system Muid, Abdul; Aminah, Nina Siti; Budiman, Maman; Djamal, Mitra
International Journal of Electrical and Computer Engineering (IJECE) Vol 15, No 2: April 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v15i2.pp1532-1543

Abstract

Peatland fires are a severe threat to the global environment. Existing peatland fire early detection systems commonly detect parameters such as air temperature, humidity, gas, smoke, and fire. This paper proposes a new peatland fire early detection method using the twig moisture content parameter. This method utilizes the most significant parameter approach for fire vulnerability compared to current peatland fire early detection systems. In particular, we developed an internet of things (IoT)-based twig dryness sensor to realize a field-applicable system. We propose a twig dryness sensor using the resistive sensing method, which employs a needle electrode to measure twig moisture content. Using the twig dryness sensor, three classifications of flammability were obtained, namely very difficult (moisture above 30%), difficult (moisture between 5%-30%) and easy (moisture less than 5%). This device utilizes readily available compact and portable materials. This instrumentation is digitally controlled with a low- power consumption microcontroller and long range (LoRa) transmitter, providing a long-life battery and long-range data transmission. Sensor data visualization is presented as twig dryness values and categorized according to fire vulnerability levels. The proposed system provides real-time and sustainable measurement.
Pengembangan Prototipe Alat Pengukur Medan Magnet Menggunakan Sensor Magnetik 49E Nur, Rechan Zahrotun; Aminah, Nina Siti; Aimon, Akfiny Hasdi
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.13.4.573-578.2024

Abstract

The magnetic field is an interesting physical phenomenon and found in everyday life. Many currents technological developments are applications of the magnetic field concept, such as electronics, electric motors, fast trains, and others. In this research, a prototype for measuring magnetic fields was developed with a physics instrumentation system. This prototype can be used for experimental measurements of magnetic fields for physics lecture in the school. It was found that a magnetic field measurement tool could be made using a physics instrumentation system. So, this tool can be used as an experimental medium for measuring the magnitude of the magnetic field in permanent magnet and wires carrying electric current. The prototype was consisted a 49E magnetic sensor. It is hoped that the prototype can replace the Gaussmeter or Teslameter which are relatively expensive. The prototype magnetic field measuring instrument was calibrated by comparing the magnetic field strength measured by the 49E sensor with the Lutron GU-3001 Gaussmeter. Measurements are observed at the centre of the object and parallel to the position of the measuring instrument. The results of the measurements show that the average magnetic field strength on the Gaussmeter and 49E sensor is 246.7 μT and 487.3 μT for permanent magnet and 51.2 μT and 96.9 μT for coiled wires.
The The Analyse of Barton Pendulum for Application of Resonance Experiment for Senior High School Student ALBAB, ALFI NUR; Evita, Maria; Aminah, Nina Siti; Irvianto, Berlian Oka
Indonesian Journal of Physics Vol 36 No 1 (2025): Vol 36 No 1 2025
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itb.ijp.2025.36.1.5

Abstract

While pendulums have been around for thousands of years and have even been successfully incorporated into high school curricula, they are still minimally used in Physics experiments on resonance materials. In this study, we designed the Barton Pendulum as a simple laboratory kit operated by teachers and easily observed by students. The pendulum system consists of a series of objects and a small ball connected and suspended with a carbolic string. The small ball here is none other than the trigger that makes all objects oscillate. As an observation material, the length of the string for each object is made different (40 cm, 29.8 cm, 20 cm, 9.5 cm, 6.7 cm). The period of each object in the system is observed using a stopwatch so that the oscillation frequency of each object is known. The object that resonates with the ball is the object that has the same length as the length of the hanging string of the ball, which means that this object has the same natural frequency as the frequency of the ball. The phase difference between the object and the trigger is also observed. The phase difference is equal to rad for objects with a string length equal to the length of the trigger string, and the phase difference is equal to π rad for objects with a string length longer than the length of the trigger.
Co-Authors Abdul Muid Aimon, Akfiny Hasdi Albab, Alfi Nur Evita, Maria Irvianto, Berlian Oka Maman Budiman Mitra Djamal Nur, Rechan Zahrotun