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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 15 Documents
 1   2 
Search results for , issue "Vol 18, No 1 (2021)" : 15 Documents clear
ANALISIS PENGARUH SUHU UDARA, CURAH HUJAN, KELEMBABAN UDARA DAN KECEPATAN ANGIN TERHADAP ARAH PENYEBARAN DAN AKUMULASI PARTICULATE MATTER (PM10): STUDI KASUS KOTA PEKANBARU Muhaniroh Muhaniroh; Riad Syech
Komunikasi Fisika Indonesia Vol 18, No 1 (2021)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.18.1.48-57

Abstract

Forest fires in Riau Province are the biggest contributor to air pollution that spreads to the urben area of Pekanbaru. PM10 is one of the most dangerous elements contained in forest fire smoke. This study aims to map areas that have accumulated the spread of PM10 in the city of Pekanbaru. This research has been carried out using a data interpretation methodology using data on the value of PM10, rainfall, air temperature, humidity, wind direction and wind speed in the form of monthly data from 2015 – 2019. Data processing is carried out using Microsoft office excel 2017, SPSS, surfer 17, google earth pro. The result of the analysis there is a significant effect of wearther parameters on PM10. Wind speed has a strong influence on the spread of PM10. Mapping of wind distribution patterns and distribution patters of PM10 in sub-district Limapuluh every year and the wind direction accoriding to the wrplot flower chart always goes to sub-direction Limapuluh.
PREDIKSI KADAR PARTICULATE MATTER (PM10) MENGGUNAKAN JARINGAN SYARAF TIRUAN DI KOTA PEKANBARU Wima Puspita; Defrianto Defrianto; Yan Soerbakti
Komunikasi Fisika Indonesia Vol 18, No 1 (2021)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.18.1.1-4

Abstract

This aims of this study is to predict particulate matter (PM10) levels in Pekanbaru using back propagation artificial neural networks (ANN) based on weather factors. The data used in the form of data from 2014 – 2017 as training data and 2018 data as test data. The architecture proposed is composed of 5 – 5 – 1 neurons and uses the logig-logsig-purelin functions. The training process produces a traincgb with a small MSE value and in the process of testing the PM10 prediction compared to BMKG data has an average error of 26.9062%.
INTERPRETASI LAPISAN BAWAH PERMUKAAN DENGAN MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER DAN GEOKIMIA: STUDI KASUS TPA MUARA FAJAR RUMBAI Alifia Putri Yasmin; Juandi M
Komunikasi Fisika Indonesia Vol 18, No 1 (2021)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.18.1.22-28

Abstract

The need for water daily is a big problem for people living around Muara Fajar Final Processing Place (TPA) – Rumbai. This study aims to identify the depth of subsurface structures around the Muara Fajar landfill area using the Schlumberger configuration dielectric method and determine the water quality in the community wells around the landfill site. The data obtained in the acquisition process are used to calculate the apparent resistivity value at each measurement point and analyzed quantitatively and qualitatively. Then proceed with the inversion process using the progress program so that obtained resistivity value and layer thickness at each point of measurement. The results of measurement inline 1 get a range of resistivity values ranging from 961.19 – 2.10 Ωm and line 2 of 109.31 – 31.15 Ωm. Underground water taken is residents well water in the research area as many as 5 sample points using GPS. This underground water sample will be tested with parameters such as pH, TDS, Conductivity, Salinity, and Turbidity. Underground water cannot be consumed from the results of the water quality test with the parameters mentioned at the beginning if referring to the Regulation of the Minister of Health of the Republic of Indonesia because the pH obtained in all underground water samples is < 6.5 or acidic, the value of the conductivity exceeds the quality standard, and high dominant salinity value. As for the TDS and Turbidity parameters, the values are by the quality standard.
PENGUKURAN KETINGGIAN MUKA AIR PADA LAHAN GAMBUT MEMPERGUNAKAN SENSOR ULTRASONIK HCSR-04 Novianti Novianti; Lazuardi Umar
Komunikasi Fisika Indonesia Vol 18, No 1 (2021)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.18.1.69-74

Abstract

Indonesia is a country that has an area of + 14 million hectares of peatlands. Utilization of Indonesia's peatlands is used in various sectors such as plantation and agriculture which increase income in the economic sector so the importance of peatland management. Measurement of the water level in peat is very necessary to maintain the stability of the TMA (water level) of the peat, which is 40 cm. This study uses the ultrasonic sensor HCSR-04  which has a resolution of 0.3 cm with a measurement range of 2 cm to 4 m and is coupled with the Arduino Unowhich is open source so that measurements can be carried out directly using the serial monitor on Arduino-uno. The ultrasonic sensorHCSR-04  is made on a prototype that will be used in TMA measurements both in the field and on a laboratory scale. The measurements show very accurately results with measurement errors 1.2 % with measurements from 100 – 500 mm. measurement error for water temperature  variations of  30 ºC, 35 ºC,and 40 ºC is 1.8%, 6% and than 10%.
RANCANG BANGUN SISTEM PELACAK KENDARAAN MENGGUNAKAN GPS DAN GSM BERBASIS ARDUINO NANO Muhammad Fadhurrahman; Elvan Yuniarti; Dewi lestari
Komunikasi Fisika Indonesia Vol 18, No 1 (2021)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.18.1.5-11

Abstract

Vehicle theft rates in Bekasi City are still high. Only about 22.7% cases have been successfully solved. The main problem is hard to track vehicles because too many vehicles in the city of Bekasi. The aims of this research is to design and build a vehicle tracking system using GPS, GSM, Relay, and Arduino Nano. The test was performed by measuring the length of time it takes for GPS device to locks the signal satellite, receive and send a short message to vehicle’s owner. The result was succeeded in designing and building vehicle tracking system using GPS, GSM, and Arduino Nano with a relay as a support to make the vehicle stay in an off condition and can trigger an alarm sound so it can easily to find the location of the vehicle. GPS device has an average time delay of locking a signal for 196 seconds at daylight and 72 seconds at night with accuracy for amount 95.33%. Tracker device has an average time delay for sending message to user at 13.82 seconds for different mobile’s operator and 11.60 seconds for the same mobile’s operator with accuracy for amount 70.73%.
PENENTUAN NILAI SUSEPTIBILITAS DAN UKURAN PARTIKEL MAGNETIK PASIR PATAI KATA PARIAMAN SUMATERA BARAT MENGGUNAKAN METODE BALL MILLING Annisa Alhasna Kurnia; Antonius Surbakti
Komunikasi Fisika Indonesia Vol 18, No 1 (2021)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.18.1.29-34

Abstract

Determination of magnetic properties and magnetic particle size of sand from Kata Pariaman Beach, West Sumatera have been carried out using Pasco Magnetic Probe and scanning electron microscope (SEM) method. Sand samples that have been dried beforehand are then synthesized using two stage ball milling, namely 40 hours first stage, and second stage as a function of 10, 20, 30, and 40 hours with an iron ball with a diameter of 1.5 cm. The results showed that the value of magnetic susceptibility and mass susceptibility increases as milling time increases. The magnetic and mass susceptibility values obtained included iron oxide particles such as Magnetite Fe3O4, hematite and maghemit with a value interval of 20,000 to 110,000. The results of the x-ray fluorescence (XRF) test showed the composition of Fe and Ti increased after ball milling, while other elements such as Si decrease. The results of the study particle size by SEM had a small size with increasing ball milling time from 10, 20, 30, and 40 hours.
PEMBUATAN DAN KARAKTERISASI ELEKTRODA KARBON AKTIF DARI BIOMASSA PELEPAH AREN DENGAN PERSENTASE KOH Haliza Putri; Rakhmawati Farma
Komunikasi Fisika Indonesia Vol 18, No 1 (2021)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.18.1.75-80

Abstract

Energy is one of the basic needs in the human life cycle. Energy sources that are often used are non-recyclable energy sources, so a new innovation is needed in overcoming the energy crisis problem by using renewable natural materials, one of which is efforts to make energy storage components made from activated carbon.Activated carbon is a type of carbon that has a large surface area. Activated carbon can be applied as an activated carbon electrode such as lithium ion batteries and supercapacitor. Electrode in this study were produced from sugar palm midrib biomass. The electrodes production utilized chemical activation using Kalium Hydroxyde with various percentage of 5%, 10%, and 15% which of PA-05, PA-10, and PA-15 recpectively. Aktivated carbon electrodes were prepared through a pre-carbonization, chemical activation, carbonization process using N2 gas at temperature 600 °C and followed by physical activation using CO2 gas at temperature 900 °C. Analysis using XRD for microstructure show semicrystalline structure for the activated carbon electrodes which is by the presence of peaks at angel of 2θ around 24° and 44° with respectively crystal orientation (002) and (100).
PEMETAAN SUSEPTIBILITAS MAGNETIK DAN PENENTUAN KANDUNGAN LOGAM PADA AIR GAMBUT DI KELURAHAN TUAH MADANI KECAMATAN TAMPAN PEKANBARU Siti Alisna; Salomo Sinuraya
Komunikasi Fisika Indonesia Vol 18, No 1 (2021)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.18.1.12-17

Abstract

Research on mapping the value of magnetic susceptibility and determination of metal content in peat water in Tuah Madani Village, Tampan District, Pekanbaru has been carried out. Samples were taken with each distance 50 meters to the north and east at 64 different points of 150 ml. The results of the calculation of susceptibility with the Quincke method obtained the lowest susceptibility value of 1.551 × 10-5 and the largest of 1.760 × 10-5. AAS test results and susceptibility calculations indicate that the peat water under study is paramagnetic. Mapping of magnetic susceptibility was carried out using the surfer 11 application while determining the metal content using AAS. The sample density was measured to produce values at intervals of 989,000 kg/m3 to 998,000 kg/m3. AAS test results were carried out on five samples chosen based on the value of magnetic susceptibility with the measured parameters namely Mn, Zn, Cr and Mg. Based on the standard threshold value of heavy metals as pollutants, it is known that the content of Mn, Zn, Cr and Mg. Mg in this peat water sample is still categorized as safe because it has not exceeded the standard threshold so it is suitable to be in the environment and not pollute the environment. Testing the parameters most contained in the sample are Mg.
PEMETAAN SEBARAN MATA AIR PANAS DI DAERAH OBJEK WISATA DESA PAWAN MENGGUNAKAN METODE GEOLISTRIK TAHANAN JENIS KONFIGURASI WENNER Fadli Abdillah; Usman Malik
Komunikasi Fisika Indonesia Vol 18, No 1 (2021)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.18.1.35-41

Abstract

Geothermal is one of the many natural resources that provides benefits to human such as using hot spring as a natural tourism spot. Hot spring in Pawan Village need to be researched to explore the presence of Hydrotermal. In this study, the distribution of hydrotermal that occur based on the resistivity of subsurface rocks resulting from geophysical exploration using resistivity geolelectric method with Wenner configuration. The result of this exploration were processed using Res2Dinv software to view soil layer data based on resistivity and points containe hot water aquifers. The resistivity values on the underground layer srtucture model is ≤ 10 Ohm.meter on each trajectory. The constituent layers of each track consist of hot water, clay, sand interlocking with clay, gravel sand and gravel.
INTENSITAS EFEKTIF SINYAL Wi-Fi DALAM RUANGAN TERTUTUP TERHADAP FUNGSI TERMODINAMIK Zamri Zamri; Saktioto Saktioto
Komunikasi Fisika Indonesia Vol 18, No 1 (2021)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.18.1.81-87

Abstract

Wi-Fi signal is an electromagnetic wave which in its transmission does not require an intermediary medium used in communication. But the intensity of the signal is influenced by the media it passes through. So in this article we will investigate how the signal propagation in a room is affected by the thermodynamic function. The treatment carried out is to show how the source point, namely the router and the receiver, namely the receiver, where later what is investigated is the trip to the position function, then a measurement will be carried out at that position which depends on changes in temperature and humidity in a closed room which is limited to the study. The source studied in the study was the signal strength intensity on the position, humidity and temperature functions. What is analyzed is the process of wave fluctuation at a certain time with varied data which will later be compared with other experimental results as a comparison, and will also show the signal intensity contour under normal conditions and conditions when the disturbance occurs.

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