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Usman Malik
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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 10 Documents
 1 
Search results for , issue "Vol 19, No 3 (2022)" : 10 Documents clear
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.
SISTEM MONITORING KEBAKARAN HUTAN BERBASIS INTERNET OF THINGS (IoT) Jesi Pebralia; Rustan Rustan; Rizqa Raaiqa Bintana; Iful Amri
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.19.3.183-189

Abstract

In this study, a forest fire monitoring system based on IoT has been developed where the parameters used include temperature, wind speed, air humidity, and hotspots. These physical parameters are measured in real time using sensors installed in locations prone to forest fires. The sensor measurement data sent and processed by the Arduino Uno microcontroller and sent to the server using the Internet of Things (IoT). The forest fire monitoring system developed has a high level of accuracy, where the temperature sensor has an accuracy of 99.9%, the air humidity sensor has an accuracy of 97.85%, and the wind speed sensor has an accuracy of 90.70%. The hotspot detection system also has good performance, where the sensor can detect the presence of hotspot in real time. The development of an IoT system for monitoring four forest fire parameters was made using the Blynk application. The system can work well where data from the four forest fire parameters can be monitored in real time via computer devices or via smartphones.
POTENSI NANOPARTIKEL PERAK HASIL BIOSINTESIS MENGGUNAKAN EKSTRAK KULIT SENTUL SEBAGAI PENDETEKSI LOGAM MERKURI Ari Sulistyo Rini; Anggrid Fitrisia; Yolanda Rati
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.19.3.190-194

Abstract

Silver (Ag) nanoparticles have recently been widely applied due to its high surface plasmon resonance (SPR) properties compared to other metals. In this present work, Ag nanoparticles were prepared through a green synthesis technique that uses sentul peel extracts as a reducing agent. Ag nanoparticles were prepared by reacting AgNO3 and the extract at the volume ratios of 4:1, 3:2, and 1:1. These solutions were heated at 80°C for 30 minutes to form colloidal silver nanoparticles. The optical properties of Ag nanoparticles were characterized using UV-Vis and FTIR spectroscopy. Furthermore, Ag nanoparticles were tested as an indicator of mercury metal detection in term of colorimetric. The UV-Vis absorbance peak of Ag nanoparticles was obtained at wavelengths of 409 nm, 408 nm, and 402 nm. The FTIR spectrum showed the presence of four functional groups, namely, C≡C, C=O, HC≡CH, and O-H. The optimum sample of Ag nanoparticles in the detection of metallic mercury is the 4:1 sample because it shows a significant colour change.
ANALISIS BOD, COD, DAN TSS PADA LIMBAH INDUSTRI MINYAK SAWIT DENGAN METODE FILTRASI MENGGUNAKAN KARBON AKTIF TEMPURUNG BIJI KARET Ety Jumiati; Abdul Halim Daulay; Siti Rahma Daulay
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.19.3.136-140

Abstract

This research has carried out the quality of palm oil wastewater before filtration, after filtration, and the most optimal variation. In this study using activated carbon seed shell, zeolite, and silica sand with sample variation A: (60%:20%:20%) , B: (50%:25%:25%), and C: (40% :30%:30%). Tests in this study include: (BOD, COD and TSS). The results of testing the palm oil industrial waste before the filtration process did not meet the RI Minister of Environment Regulation No. 5 tahun  2014, while after the filtration process it met the requirements of the RI Minister of Environment Regulation No. 5 tahun 2014, and the most optimal variation in this test was sample A with value 60% activated carbon.
ANALISIS UJI KIMIA KESADAHAN DAN BESI PADA AIR SUNGAI HULU BANGKO DENGAN MEDIA FILTRASI KARBON AKTIF KULIT KACANG TANAH Ety Jumiati; Abdul Halim Daulay; Putri Indah Sari
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.19.3.141-145

Abstract

The filtering of river water has been carried out with the aim of knowing the edvantages of the river water upstream of Bangko before the filtration process is carried out, after the filtrations proces is caried out, and to determine the most optimum variation. In this study using the composition of activated carbon of peanut shells, silica sand, manganese, and zeolite with sample variations A (30% : 30% : 20% : 20%), B (35% : 25% : 20% : 20%), and C (40% : 20% : 20% : 20%). In this study, the chemical test parameters were: (hardness, and iron). The results of testing the river water before the filtration process has not met the PERMENKES RI No. 32 of 2017. Meanwhile, after the river water filtration process has met the clian waters standard based on the PERMENKES RI No. 32 of 2017. And the optimum variation is sample C with an activated carbon value of 40%.
KAJIAN PEMANFAATAN METODE SEVERE HAIL INDEX SECARA SPASIAL UNTUK DETEKSI KEJADIAN HUJAN ES DI JAWA BARAT I Made Agus Satya
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.19.3.161-168

Abstract

Hail is precipitation that is detrimental to the community, occurs in a short time, and is very local. It becomes a challenge to detect and give early warning. One method known to detect hail is the severe hail index (SHI) and its derivative product, the probability of severe hail (POSH). Utilize weather radar, the method detects by taking the value of the kinetic energy flux of hail by calculating the integration of the reflectivity weight and temperature flux from the freezing level to a temperature of -20ºC. This study aims to examine the spatial use of SHI and POSH methods to detect hail events in the West Java region. The results of SHI value obtained for 350 Jm-1s-1– 400 Jm-1s-1 for Depok and 280 Jm-1s-1– 320 Jm-1s-1 for Bogor, which met the threshold of average hail threshold of 373 Jm-1s-1. Then POSH obtained a 70% – 80% probability for Depok and Bogor. Meanwhile, for Bandung, the SHI value is 12 Jm-1s-1– 14 Jm-1s-1 and 0% for POSH. Concluded that hail detection utilizing SHI and POSH methods effectiveness, influenced by the distance to the radar so it requires other additional methods such as RGB Composite from satellite imagery as support. Spatial calculations can also reduce value bias and give more accurate location occurrences.

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