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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 390 Documents
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PENGARUH PENAMBAHAN ADITIF DAUN JAGUNG (Zea mays L.) TERHADAP SIFAT FISIS DAN MEKANIK KERAMIK ALUMINA Ayu Dwi Retno; Ety Jumiati; Ridwan Yusuf Lubis
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.20.3.275-278

Abstract

Research has been carried out on the manufacture of alumina ceramics. This study aims to determine the effect of the addition of corn leaf additives on the physical and mechanical properties of alumina ceramics. Variations in the composition of alumina and corn leaf ash are: 95% : 5%; 90% : 10%; and 85% : 15%. The process of making these ceramics uses the die prissing method, and uses variations in firing temperature, namely 1300°C  and 1400°C for 1 hour, and is printed using a 3 × 3 × 1 cm3 mold. the characterization of the tests carried out included physical properties, namely density and porosity and mechanical properties, namely hardness.  The  results of the data obtained from  measuring  the  density  at 1300°C are 2.11 – 2.18 g/cm3 and at 1400°C they are 2.13 – 2.20 g/cm3, the porosity at 1300°C is 25.82% – 27.25% and 1400°C temperature of 25.36% – 26.89%, and 1300°C temperature hardness test of 59.641 MPa – 67.055 MPa and 1400°C temperature of 61.926 MPa – 70.958 MPa.
PEMODELAN GENERATOR PLASMA HIDROGEN FREKUENSI GELOMBANG MIKRO TEKANAN ATMOSFIR Reeky Fardinata; Saktioto Saktioto; Rakhmawati Farma
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.20.3.205-214

Abstract

The model used in this work is a two-dimensional fluid plasma model coupled with Maxwell equations at atmospheric pressure. The model was created by applying different plasma torch parameters using the finite element approach. Three separate stages of the numerical modeling were used to show how the increase in electron density increases with time. It may be inferred from the molecular ion distribution features that the torch's quartz tube's port, which is larger than the tube's center, is where the molecular ions are primarily disseminated. Reduced pressure and the calculated distance from the port to the center of the quartz tube result in a drop in the density ratio of molecular ions to electrons. The research on microwave plasma properties revealed that atmospheric pressure is important for modeling and developing plasma sources, particularly for the conversion of carbon dioxide.
SIFAT OPTIK NANOMATERIAL ZnO DOPING NIOBIUM BERDASARKAN WAKTU SINTESIS Iwantono Iwantono; Muhammad Pauji; Puji Nurrahmawati; Nashiha Chalvis Syahra
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.20.3.243-246

Abstract

This research was conducted to fabricate dye sensitized solar cell based on ZnO nanomaterial. Efforts to see the optical properties of niobium-doped ZnO are through UV-Vis characterization. Niobium-doped ZnO nanomaterials with growth time variations of 6, 8, and 10 hours have been successfully synthesized using hydrothermal methods. Samples resulting from synthesis were characterized using UV-Vis spectroscopy along with its energy gap. Samples with a synthesis time variation of 6 hours had higher absorbance absorption and a low energy gap of 3.09 eV.
ANALISIS UJI FISIS BRIKET AROMATERAPI BERBAHAN SERAI DAN SERBUK KAYU DENGAN PEREKAT PINUS MERKUSII Ervina Putri Wulandari; Ety Jumiati; Miftahul Husnah
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.20.3.247-252

Abstract

Aromatherapy briquettes have been made as an alternative fuel made from lemon grass, sawdust and pine resin. Composition variations between lemongrass and sawdust (meranti) in samples A (30% : 70%), B (40% : 60%), C (50% : 50%) with 60% pine resin adhesive with drying time 7 days. Physical test parameters carried out: density, moisture content, and heat. The test results showed that the optimum aromatherapy briquettes were sample C which had a density value of 0.954 g/cm3, a moisture content of 7.81% and a calorific value of 8640 cal/g. The value of water content and heating value complies with SNI 01-6235-2000.
PERANCANGAN SISTEM MONITORING DAN KONTROL KUALITAS AIR BERBASIS IoT PADA KOLAM IKAN AIR TAWAR Riski Muhammad Natsir Nasution; Nazaruddin Nasution; Mulkan Iskandar Nasution
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.20.3.279-282

Abstract

Research has been carried out on designing an IoT-based water quality monitoring and control system in freshwater fish ponds, which aims to produce a tool that is able to monitor and control water quality remotely in freshwater fish ponds, to find out how the tool works in monitoring and controlling water quality over long distances in freshwater fish ponds. This research was conducted by connecting several components, namely using Arduino Mega 2560, WiFi expansion shield, pH sensor, turbidity sensor, DS18B20 sensor, ultrasonic sensor HC-SR04, and two DC pumps. Each sensor is compared with the actual measuring instrument and has an average percentage of error, the pH sensor is compared three times, namely the pH buffer solution of 4.01 with an average error of 2.1%, in the pH 6.86 buffer solution the average error is 0.4 %, and in aquadest solution the average error is 0.7%, the turbidity sensor has an average error of 1.6%, and the DS18B20 sensor has an average error of 0.4%. It can be concluded that the designed tool has been successfully made, and works well, for monitoring it is displayed on the LCD and in the Blynk application, for controlling water can be done through the Blynk application by turning on and off the pump that has been made.
PREDIKSI INDEKS NITROGEN DIOKISDA (NO2) MENGGUNAKAN MODEL NEURALPROPHET STUDI KASUS DKI JAKARTA Jhon Paul Estomihi Togatorop; Risang Bayu Firdaush; Yosafat Donni Haryanto
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.20.3.215-222

Abstract

Nitrogen dioxide gas (NO2) is one of the air quality parameters that can delay nerve recovery after a stroke. DKI Jakarta as the Capital City of the State of Indonesia continues to experience an increase in population which is marked by an increase in the number of motorized vehicles and infrastructure development. Air quality prediction, especially NO2, is important as an anticipatory step in detecting air pollution, especially if the measuring instrument is damaged. This study uses standard air pollutant index (ISPU) data as a time series from 2018 – 2021 to predict the NO2 index in 2022 using the NeuralProphet model. The NeuralProphet model which was designed with parameters of 1000 epochs, learning rate of 0.10, proportion validation of 0.10, and daily frequency produced MAE and RMSE models from the training data of 5.426610 and 7.977689. MAE validation and validation RMSE from the proportion of 0.10 tasting data were 27.762064 and 35.434227. The prediction of the NO2 index for 365 days resulting from the NeuralProphet model shows that the NO2 index experiences an increasing trend which is influenced by seasonal events both annually and weekly. Affecting annual seasons, such as national holidays and monsoon rain patterns. The national holidays in question, such as New Year’s Day, Lunar New Year’s Day, and Christmas Day, trigger an increase in traffic flow. The peak of the NO2 index occurred in February and December, while the NO2 index weakened as it entering October.
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.

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