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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 20, No 3 (2023)" : 15 Documents clear
REDUKSI BAKTERI TOTAL COLIFORM DAN ESCHERICHIA COLI PADA AIR SUMUR DENGAN MENGGUNAKAN POT KERAMIK BERBAHAN SEKAM PADI DAN ZEOLIT Masthura Masthura; Ratni Sirait; Nurul Rizki Amalia
Indonesian Physics Communication Vol 20, No 3 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.3.253-258

Abstract

Well water has been tested using ceramic pots made from clay, rice husk and zeolite which aims to determine the effect of variations in the composition of materials in ceramic pots on reducing levels of total coliform and escherichia coli, as well as to determine the effectiveness of ceramic pots in reducing these bacteria. Variations in clay, rice husk and zeolite ceramic pot materials in the samples were A (60% : 20% : 20%), B (50% : 20% : 30%), and C (40% : 20% : 20%) with a sieve size of 100 mesh which is flowed with a batch system. The process of making ceramic pots is by burning for 8 hours at a temperature of 850°C – 900°C and producing ceramic pots with a height of 18 cm and a diameter of 21 cm. Total coliform with the highest efficiency of 96,15% and Escherichia coli with the highest efficiency of 100% for 152 hours and 136 hours. While the results of the research on the ceramic membrane sample B were able to reduce total coliform and Escherichia coli with the lowest efficiency of 64,10% within 120 hours.
DESAIN KIT PEMBELAJARAN GERAK MENGGELINDING PADA BIDANG MIRING UNTUK SISWA SEKOLAH DASAR Dzulfiqar Yudha Pranata; Rusydi Balfas; Mohammad Kelfiana; Zaky Vebrian; Joseph Bagas Triambada; Rima Fitria Adiati
Indonesian Physics Communication Vol 20, No 3 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.3.283-292

Abstract

The experiment of rolling motion on an inclined plane can be related to everyday life and be an example of learning science while playing. This study aims to design a learning kit for rolling motion on an inclined plane for elementary school students. The research method used is research and development (R&D) which has been used to validate and develop products used in education. The result of this research is a rolling motion science learning kit design for elementary school students which consists of an inclined plane, test objects, and student worksheets. The objects used as test objects are solid cylinders, thin hollow cylinders, solid balls, hollow balls, and cubes. From the experiments, obtained variations in acceleration results ranging from 1.23 m/s2 to 3.27 m/s2. Based on experiments and simulations, the designed kit meets the theory of rolling motion and mechanics-dynamic analysis.
SINTESIS KARBON AKTIF BERBASIS BIOMASSA SERAT BINTARO SEBAGAI BAHAN ELEKTRODA UNTUK APLIKASI SEL SUPERKAPASITOR Aria Yunita; Rakhmawati Farma; Awitdrus Awitdrus; Irma Apriyani
Indonesian Physics Communication Vol 20, No 3 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.3.223-230

Abstract

Biomass-based activated carbon has been widely developed due to its environmental friendliness, abundant availability, porous structure, high specific surface area and good electrical conductivity. One of the ways to improve the performance of supercapacitor cells is to increase the carbonization temperature, so that in this study various carbonization temperatures were carried out at 500°C, 600°C and 700°C. The results showed that the carbonization temperature of 600°C was the optimum temperature for making SB-based activated carbon. This is indicated by the results of measuring the physical properties of SB-600 in the form of the lowest density shrinkage value which can increase porosity thereby increasing the performance of supercapacitor cells. From this study, the highest capacitance value of 213 F.g-1 was found on the SB-600. The results obtained indicate that the selection of the optimum carbonization temperature is important and can improve the performance of supercapacitor cells.
ANALISIS DAN SINTESIS BUNYI PETIKAN KALIMBA MENGGUNAKAN TRANSFORMASI FOURIER Abd Djamil Husin; Indriyanti Rahmi Setyani; Sidikrubadi Pramudito; Sitti Yani; Ardian Arif Setiawan
Indonesian Physics Communication Vol 20, No 3 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.3.259-266

Abstract

This research aims to analyze the sound produced by kalimba plates using the Fourier transformation. This research went through two stages, namely the analysis stage and the synthesis stage. The kalimba plate is plucked with variations in the applied force of 2 N to 5.5 N. The sound of the kalimba pluck is recorded using a sound sensor connected to PASCO Capstone software so that a deviation graph is produced as a function of time. The data obtained was then analyzed using Octave software. The research results show that the frequency is directly proportional to the damping coefficient value. The higher the frequency, the higher the frequency spectrum will be widened. The resulting Fourier coefficients only capture the values of the fundamental harmonic frequencies. This is because the kalimba plate has high rigidity.
PEMANFAATAN LIMBAH SERABUT KELAPA MUDA SEBAGAI ELEKTRODA KARBON SUPERKAPASITOR DENGAN VARIASI KONSENTRASI AKTIVATOR ZnCl2 Ridho Nopriansyah; Awitdrus Awitdrus
Indonesian Physics Communication Vol 20, No 3 (2023)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.20.3.301-305

Abstract

The chemical activation method is a simple and low-cost activation method that can modify the surface morphology associated with improving the electrochemical properties of supercapacitor cell electrodes. The porous carbon framework was derived from young coconut fiber biomass by optimizing the chemical activation reagent (ZnCl2). Carbon material derived from coconut fiber is a biomass for the application of supercapacitor cell electrodes through the pre-carbonization stage at 200°C for 1 hour 30 minutes, chemical activation using the activating agent ZnCl2 with various concentrations of 0.1, 0.3, and 0.5 M, the carbonization process uses gas N2 with a temperature of 600°C and physical activation using CO2 gas with a temperature of 750°C. The optimum concentration of young coconut fiber-based carbon electrodes is found at a concentration of 0.5 M, which has the highest density shrinkage percentage of 53.11%. X-ray diffraction analysis showed that the sample at a concentration of 0.5 M was amorphous with two wider diffraction angle of 2q at an angle of 24.867° and 44.556°, with the lowest Lc/La ratio of 0.3 and an average microcrystalline layer of 2.3. Analysis of electrochemical properties showed that samples at a concentration of 0.5 M has an optimum specific capacitance of 81.84 F/g in the CV.

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