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INDONESIA
Komunikasi Fisika Indonesia
Published by Universitas Riau
ISSN : 14122960     EISSN : 2579521X     DOI : 10.31258/jkfi
Core Subject : Science, Engineering,
Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics
KFI mempublikasikan artikel hasil penelitian dan review pada bidang fisika, namun tidak terbatas, yang meliputi fisika murni, geofisika, plasma, optik dan fotonik, instrumentasi, dan elektronika, dan fisika terapan (aplikasi fisika).
Arjuna Subject : Fisika dan Astronomi - Fisika dan Astronomi (Lain-Lain)
Articles 15 Documents
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Search results for , issue "Vol 21, No 1 (2024)" : 15 Documents clear
Comparison of measuring the noise level of glass wool soundproofing material using a sound level meter and the KY-037 noise measuring instrument Indah Pratiwi Tanjung; Masthura Masthura; Nazaruddin Nasution
Indonesian Physics Communication Vol 21, No 1 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.1.25-32

Abstract

The problem that people often face, both at home and in public places, is noise that disturbs concentration and comfort. Noise can be measured by sound level measurement, namely by measuring the intensity or loudness of sound in hertz and sound waves in decibels (dB). Then noise can be reduced by materials that can absorb sound, one of which is glass wool. The purpose of this research is to make a noise-measuring instrument, find out the effectiveness of damping materials, and compare the results of measuring noise levels. The measuring instrument for noise in this study is the sound level meter (SLM) using a KY-037 sound sensor programmed with Arduino Uno as a microcontroller. The results of noise measurements using a factory standard SLM and noise measurement tool KY-037 obtained an average factory standard SLM measurement of 72.23 dB and the average measurement of the KY-037 noise meter is 67.67 dB. From the measurement results with the two tools, the difference in comparison is 4.56 dB with a percent deviation of 6,33%. Then the results of testing the glasswool sound-dampening material with a comparison of the two measuring devices obtained that each sound intensity absorption was 17.9 – 28.5 dB and the effectiveness of the reduction was 21.8% – 34.9%.
An internet of things-based monitoring system for agricultural land suitability for oil palm planting Amriansyah Simatupang; Mulkan Iskandar Nasution; Muhammad Nuh
Indonesian Physics Communication Vol 21, No 1 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.1.51-58

Abstract

Oil palm is the most productive type of plant in producing vegetable oil. The development of the industrial revolution led to an explosion in demand for vegetable oil so palm oil was a major contributor to the country's foreign exchange. Indonesia is one of the countries with the largest oil palm plantations in the world. However, the yields produced are still not optimal due to several factors, namely the condition of soil pH, soil moisture, and the surrounding temperature. Soil contains nutrients such as nitrogen (N), potassium (K), and phosphorus (P) which oil palm plants need in certain amounts to grow. To find out the quality of the soil, several methods are carried out by taking a soil sample and using a soil pH meter, however, this method requires a long time and the measurement is only limited to measuring soil pH. This research produced a system for detecting soil pH, soil moisture, and temperature around the soil on an IoT-based land that will be planted with oil palm, as the controller is NodeMCU ESP32. This tool displays soil pH, soil moisture, and air temperature on the LCD screen and the Blynk application page so that it can be accessed anytime and anywhere. This will make it easier for oil palm farmers to obtain accurate information before planting oil palm on vacant land. After testing and data collection, the soil pH sensor has a good correlation with an error rate of 1.71%, soil moisture of 1.23%, and air temperature of 4.04%. So that this sensor can be implemented on vacant land before planting oil palm.
Fabrication of carbon electrodes from young coconut fiber by varying the carnonization temperature as a supercapacitor application Sri Ulina Karo Sekali; Awitdrus Awitdrus
Indonesian Physics Communication Vol 21, No 1 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.1.63-66

Abstract

Supercapacitors are electrochemical energy storage devices that can provide a higher energy density than conventional dielectric capacitors. The most important component of a supercapacitor cell is the electrodes. In this study, the supercapacitor cell electrodes used are based on young coconut fiber with carbonization temperature variations of 500°C, 600°C, and 700°C. The pre-carbonization process is operated using a temperature of 200°C for 90 minutes, chemical activation using an activating agent ZnCl2 0.5 M, carbonization using N2 gas at various temperatures, and physical activation using CO2 gas at 800°C. The highest density value is the CNL-600 sample with a density loss percentage value of 50.96%. Analysis of electrochemical properties showed that samples with a carbonization temperature of 600°C had the highest specific capacitance values, namely 190.3 F/g using method of the cyclic voltammetry. This shows that the best sample is the sample with a carbonization temperature of 600°C.
What substances do we inhale? - Air quality measurement using an Android-based application Endang Surahman; Eko Sujarwanto; Irwan Muhammad Ridwan
Indonesian Physics Communication Vol 21, No 1 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.1.7-12

Abstract

Measurement of pollutants in the air is important because it’s related to health issues and environmental sustainability. This study aims to measure the concentration of pollutants in the air and learn in the environmental physics course. Measurements were carried out in 108 places with various characters in West Java Province i.e. factories, public facilities, highways, and residential. Measurements were made using the BreezoMeter application to measure the concentration of O3, CO, SO2, NO2, PM2.5, and PM10. In general, the results show that air quality is in a good category based on the air pollutant standard index. Although the air quality is in a good category in general, some places have the air quality in the unhealthy category. By knowing air quality, it is hoped that people will be more concerned about environmental sustainability and health.
Morphology test of activated charcoal from oil palm fronds with H2SO4 and NaOH activators Debby Marantika; Masthura Masthura; Ratni Sirait
Indonesian Physics Communication Vol 21, No 1 (2024)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.21.1.59-62

Abstract

Activated charcoal has been investigated by utilizing oil palm fronds using the addition of H2SO4 and NaOH activators. The purpose of this study was to determine the microstructure of the effect of activated charcoal using H2SO4 and NaOH activator at a carbonization temperature of 500°C for 60 minutes. The method used in this research is a method with a quantitative approach. The characterization used was scanning electron microscopy to determine the surface morphology of activated charcoal. The results of the tests carried out for the H2SO4 and NaOH activators showed that the best results were found in the NaOH activator which had larger pores than the H2SO4 activator, with a particle diameter size range of 0.432 – 1.564 µm which was analyzed using software Digimizer.

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