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Usman Malik
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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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APLIKASI UJI COBA SKALA LABORATORIUM IMPLEMENTASI PROTOTYPE ALAT INOVASI TEKNOLOGI PASCA PANEN BERBASIS BIOMASSA UNTUK DETEKSI TEMPERATURE DENGAN SISTEM INTERNET OF THINGS Melyna Handayani; Juandi Muhammad
Komunikasi Fisika Indonesia Vol 19, No 2 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.2.69-74

Abstract

Digital technology in the form of a drying oven is used for the drying process of a sample biomass fuel. There are 2 types of biomass used, namely Coconut Shell and Acacia tree branches. The biomass is used as fuel for the drying process in the drying oven. This study aims to analyze a change in temperature, humidity and heat with various mass variations in coconut shells and acacia tree branches. Mass variations used are 1000 gr, 1500 gr, 2000 gr, 2500 gr, and 3500 gr. The research process begins by burning biomass from the first mass variation to the last mass variation. Furthermore, in the process of burning biomass, the resulting data is accessed via the internet of things seen from a website. The results of the data have a time span of 5 minutes for each observation of temperature and humidity. The data results are the comparison of time with internal temperature on coconut shells with the highest temperature of 93.7°C with a long burning time of 440 minutes, while on wood twigs the highest temperature is 93.7°C and the time required for the combustion process is 445 minutes. The best heat produced in coconut shell of 3500 gr with a maximum heat of 377.43 Joules at an internal temperature of 61.8°C for 45 minutes. Acacia tree branches have the best calorific value with a mass of 1000 gr, it’s maximum heat of 288.82 Joules at 37.7°C for 10 minutes.
ANALISA DISTRIBUSI AIR BAWAH TANAH DI KELURAHAN TANGKERANG LABUAI MENGGUNAKAN METODE COOPER-JACOBS DAN GEOLISTRIK KONFIGURASI SCHLUMBERGER Suryadi Simbolon; Usman Malik
Komunikasi Fisika Indonesia Vol 19, No 2 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.2.108-112

Abstract

Groundwater, one part of water resources is the most needed by humans for life. The availability of ground water and the increasing population growth in Tangkerang Labuai Village reguire the use of clean water. This study aims to determine the rock layers that makes up the soil and soil aquifers and the quality of groundwater. For the soil layer, it user the Schlumberger configuration geoelectric method,for the aquifer test, uses the Jacobs step drawdown method to determine the decrease of groundwater level is time. For air quality uses radians where the pH, TDS, turbidity values describe the resistivity value. The results of the research based on data processing on a 90 m long track,ground water is found at a depth of 7-10 m with a resistivity value of 114 m, which is categorized as granite, sand, gravel, alluvium constituent layers with a resistivity value of < 1000 m or the aquifer is partially connected due to the presence of a porous rock layerhaving small pores. To test the aquifer in the well based on the relatively small decrease in groundwater, namely 0.2 and 0.1 cm with a discharge of 0.43 liter/second with a transmissivity value of 971.901 m2/day, categorized as free or connected aquifer. Groundwater could not be consumed from the results as as stated to the regulation of the Minister of Health of the Republic of Indonesia number 492 of 2010, because the pH obtained was < 6.5 or acidic nature and categorized as partially connected aquifers because the more acid of water is formal, the higher the resistivity value is obtained.
PEROVSKITE SOLAR CELLS YANG STABIL UDARA DAN EFISIEN MENGGUNAKAN NANOSTRUKTUR ZnO SEBAGAI ELEKTRON TRANSPORT MATERIAL Herna Herna; Farhan Lutfi; Ebigail Nur Tabita Tambunan; Yessi Meinarti; Ari Sulistyo Rini
Komunikasi Fisika Indonesia Vol 19, No 2 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.2.75-82

Abstract

The latest generation of photovoltaic cells are perovskite-based solar cells that can be fabricated through a simple and affordable process using high-efficiency solar power. This review also present zinc oxide (ZnO) adopted as an electron transport material (ETM) layer in the planar perovskitesolar cells due to its simple shynthesis and excellent electrical properties. ZnO ETM in conventional perovskite. Doping Aluminium (Al) with ZnO (AZO) was used the organic cation (CH3NH+3) of perovskite. The AZO ETM  was prepared by spin coating technique with AZO sol-gel   0, 0.5, 1, 1.5, 2, 2.5 and 3% Al doping. The perovskite solar cells with AZO ETM above 1.5% Al doping exhibits better and stable the performance cells because doing so can encourage the charge transporting and match the band energy with MAPl3 compared to pure ZnO.
PENGARUH DOPING MANGAN TERHADAP KOMPOSISI DAN SIFAT KRISTALINITAS PARTIKEL OKSIDA BESI PASIR ALAM SUNGAI ROKAN DIPREPARASI DENGAN METODE BALL MILLING Rahman Kurniawan; Salomo Salomo; Erwin Erwin; Defrianto Defrianto
Komunikasi Fisika Indonesia Vol 19, No 2 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.2.113-118

Abstract

The composition, crystallinity and magnetic susceptibility of nanoparticles in natural sand of the Rokan River, Riau Province have been investigated. After the iron sand separator (ISS) process, the natural sand samples were separated using NdFeB magnets to separate iron oxide particles and other non-ferrous oxides. For 70 hours, the NdFeB product was prepared using the ball milling method to produce BM products. The BM products were ball milled for 30 hours with a manganese doping concentration of 0 wt.%; 5 wt.%, and 10 wt.% produced DM 0, DM 5 and DM 10 products. Magnetic susceptibility values increased based on the values of B0 and BT measured using Pasco Magnetic Probe PS-2162. The results of XRD analysis of DM products contain a hematite phase (α-Fe2O3) which has a hexagonal structure. The crystal size increased along with the increasing concentration of Manganese from 25.494 nm; 25,542 nm to 25.669 nm. The results of XRF analysis of DM products on Fe elements decreased in percentage with increasing Manganese concentration from 18.083%; 15.407% to 12.947%. Other chemical elements such as Si, Al, K, P, Ti, Ca, Ti, Cr, Zn, V and Pb also decreased.
ANALISIS HASIL KALIBRASI ALAT PHOTOTHERAPY MERK GEA MEDICAL TYPE XHZ-90 Yeni Pertiwi; Nur Hadziqoh; M Andriza Mustofa
Komunikasi Fisika Indonesia Vol 19, No 2 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.2.83-90

Abstract

Babies born prematurely always increase every year. For this reason, it is necessary to take proper care so that the baby remains in good health. One of the treatments for premature babies is phototherapy to reduce bilirubin levels in the baby's body. In order for the phototherapy process to run as expected, of course the phototherapy equipment used in the treatment must be of good quality and quality. For this reason, quality assurance and phototherapy equipment need to be carried out through a calibration process. In this study, calibration of the GEA medical type XHZ-90 phototherapy tool was carried out. Calibration is carried out by following the standard reference work method from the Ministry of Health in 2018. Calibration is carried out by checking the physical and function of the equipment which gains a weight of 10%, electrical safety inspection of the appliance with a weight gain of 36%, and measuring the performance of the instrument, namely spectral irradiance with a weight gain of 50%. . So that the total weight gain can be 96% and it can be concluded that this tool is functioning properly and within the tolerance limits of use. The uncertainty value in the measurement of spectral irradiance takes into account the sources of uncertainty types A and B. The combined uncertainty calculation from several sources for the measurement of spectral irradiance is 1.116. This value has met the uncertainty tolerance limit value of ≥ 4.
STUDI TERMODINAMIKA PENUMBUHAN LAPISAN TIPIS Ga2Te3 Yanuar Hamzah; Ariswan Ariswan
Komunikasi Fisika Indonesia Vol 19, No 3 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.3.128-135

Abstract

Understanding the thermodynamic properties of Ga2Te3  material is a basic concept in material applications. Ga2Te3  material has attracted the attention of many researchers,  especially its application in photodetector devices, light-emitting diodes, nano-electronics, and lithium storage materials. Therefore, this research studied the Ga-Te system thermodynamically optimized crystal temperature using F*A*C*T software. The availability of thermodynamic data from this study may be helpful in the experiments. A thin layer of Ga2Te3 fabricates using the closed space vapor transport method.  A thin layer of Ga2Te3 characterizes by x-ray diffraction and energy dispersive spectroscopy (EDX). The thin layer of Ga2Te3 resulting from deposition is cubic structured crystalline, and its composition is stoichiometric. The results of the thermodynamic study of the deposit of the thin film Ga2Te3 explain a thorough understanding of the formation mechanism of the reactions that occur in the closed space vapor transport method in the vertical reactor.
EFEKTIFITAS TINGKAT PENCAHAYAAN ALAMI DAN PENCAHAYAAN CAMPURAN PADA RUANG PERKULIAHAN DI UIN SUMATERA UTARA Mulkan Iskandar Nasution; Zubair Aman Daulay; Rini Rahmadani Tampubolon
Komunikasi Fisika Indonesia Vol 19, No 3 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.3.169-175

Abstract

Lighting is part of the main factor in a building design, because it affects the activities of user in the room. The purpose of this study is knowing the level of illumination level in the classroom of the Faculty of Science and Technology, UIN North Sumatra. The study was conducted by measuring the level of natural lighting, mixed lighting levels and optimization of mixed lighting levels in classrooms 306 and 308 with reference to SNI 6197-2011 which is 350 lux. Size of classroom 306 length 8.70 m, width 8 m, height 2.80 m, while classroom 308 length 8.40 m, width 8.12 m, height 2.80 m. The natural lighting source comes from the sun (window openings), while the mixed lighting source comes from the sun (window openings) plus 36 Watt TL lamps. The measurement of lighting levels is carried out using the GM1040C luxmeter measuring instrument with 25 measurement points in accordance with the SNI 7062-2019. The measurement results for natural lighting levels, namely 161.38 lux and 206.9 lux, are not in accordance with the lighting standard, which is 350 lux, while for mixed lighting, namely 720 lux and 975 lux and optimization of mixed lighting, namely 406.68 lux, 405.72 lux and 479.28 lux and 472.44 lux are in accordance with the lighting standard of 350 lux.
ANALISIS PENGARUH INTRUSI AIR LAUT TERHADAP AIR TANAH MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER DI KELURAHAN TANJUNG KAPAL Usman Malik; Anjas Priandani
Komunikasi Fisika Indonesia Vol 19, No 3 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.3.146-153

Abstract

The effect of seawater intrusion on groundwater has been carried out in Tanjung Kapal Village, Rupat District by using the geoelectric method of the Schlumberger configuration. This study aims to determine the resistivity value, layer depth, thickness of the groundwater layer, determine the effect of seawater intrusion on groundwater and determine the water quality of residents' wells in Tanjung Kapal Village. This study took 5 samples and tested for pH and salinity parameters to determine water quality. The results of the research on line 1 had a resistivity value range between 1.13 - 0.04 Ωm depth of 0.70 - 36 m and the line 2 had a resistivity value range between 11.07 - 0.10 Ωm depth of 3.12 - 42 m. On line 1 is affected by seawater intrusion in layer 2 which has a resistivity value of 0.60 Ωm with a depth of 0.70 – 3.42 m. Line 2 is affected by seawater intrusion in layer 3 which has a resistivity value of 3.53 Ωm with a depth of 7.22 – 13.42 m. The influence of seawater intrusion causes the groundwater around the site to have brackish due to the relatively low salt content. Water quality based on pH parameters of 20% is not in accordance with quality standards and salinity parameters of 100% brackish water.
PERANCANGAN SISTEM MONITORING DAN CONTROLLING SMART HOME BERBASIS INTERNET OF THINGS Abdul Hakim Prima Yuniarto; Yuni Lestiyanti; Aflah Nurcholis; Feriawan Feriawan; Recha Nofillah
Komunikasi Fisika Indonesia Vol 19, No 3 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.3.176-182

Abstract

The design of the Internet of Things-based Smart Home monitoring and control system has been successfully carried out. This design aims to control and monitor electronic equipment in the classrooms of the ITS NU Pekalongan lecture building. The design begins with designing a microcontroller consisting of NodeMCU ESP8266 and relays that are connected to electronic equipment. Monitoring and controlling is done through the telegram bot on the telegram messenger application. The system is connected via the internet network, so it can be accessed anywhere and anytime. System testing is done by testing the functions of all the buttons on the telegram bot interface and calculating the response time to determine the delay of the system. Based on the test results, all buttons on the Smart Home system function and run properly without any errors or errors that occur. In measuring response time, the Smart Home system runs smoothly with relatively sort delay times.
PENGARUH DOPING TEMBAGA TERHADAP SUSEPTIBILITAS MAGNETIK DAN KOMPOSISI SERTA SIFAT KRISTALINITAS PASIR ALAM SUNGAI ROKAN DIPREPARASI DENGAN METODE BALL MILLING Salomo Salomo; Nanda Rizki Yosefi
Komunikasi Fisika Indonesia Vol 19, No 3 (2022)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.19.3.154-160

Abstract

The effect of copper doping on magnetic susceptibility and composition and crystallinity properties of Rokan River natural sand has been investigated. Before going through the ball milling (BM) process, the natural sand has been processed using an iron sand separator (ISS) and neodynium iron boron (NdFeb) magnets to separate magnetic and non-magnetic particles, so the result is called an ISS product. The ISS product is crushed through a BM process for 70 hours, and the result is called BM 1 product. Furthermore, BM 1 is divided into 3 parts and then doped with copper (Cu) with a concentration of 0 gr; 5 gr; and 10 gr using BM for 30 hours and are called BM 2A, BM 2B, and BM 2C products, respectively. BM 2A, BM 2B, and BM 2C products were identified and characterized using x-ray flourescence (XRF) and x-ray diffraction (XRD). XRF identification results showed that the composition of copper elements increased from 0.015% to 37.874%. Meanwhile, Fe elements decreased and other elements such as Al, Si, P, K, Ti, V, Cr, Ca and Mn as well. The XRD test results for BM 2A, BM 2B, and BM 2C products produced a hematite (Fe2O3) phase with a hexagonal crystal structure. The crystal size was calculated using the Scherrer Equation where the average crystal size decreased by 26,137 nm; 25,501 nm; and 25.270 nm.

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