cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Usman Malik
Contact Email
 usman.malik@lecturer.unri.ac.id
Phone
+62811756227
Journal Mail Official
kfi@ejournal.unri.ac.id
Editorial Address
Jurusan FMIPA Universitas Riau Kampus Bina Widya Km 12,5 Simpang Baru Pekanbaru
Location
Kota pekanbaru,
Riau
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
 20   21   22   23   24 
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%.
PENGARUH PENAMBAHAN LOGAM TRANSISI NIKEL TERHADAP SIFAT FISIS NANOROD ZnO Sumarti Sumarti; Iwantono Iwantono; Awitdrus Awitdrus
Komunikasi Fisika Indonesia Vol 17, No 3 (2020)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.17.3.155-159

Abstract

Nickel-doped ZnO nanostructures have been successfully grown using seed mediated hydrothermal method. The growth of ZnO nanostructures has been done by concentration of the Ni-doped solution, is 8 mM with the growth temperature of  90°C in 7 hours. The grown ZnO nanostructures were characterized by using UV-Vis Spectroscopy, FESEM, and XRD. The UV-Vis spectra of the samples showed that the ZnO nanorod is hexagonal in shape with a strong absorption occured in the wavelength range of 300-380 nm. The FESEM images showed that geometrical shape of Ni-doped ZnO nanostructures are nanorod with a hexagonal and nanoflower faced shapes. XRD patterns observed show five diffraction peaks at 2θ: 32,09°; 34,76°; 36,65°; 47,95° and 56,97° for Ni doped ZnO nanostructures with crystal orientation of (100), (002), (101), (102) and (110) respectively. The strongest line was found in the crystal plane of (101).
MENENTUKAN KUALITAS AIR BAWAH TANAH DISEKITAR SPBU RIMBO PANJANG KAMPAR DENGAN MENGGUNAKAN METODE GEOLISTRIK DAN GEOKIMIA Fia Firdahlia; Juandi Muhammad
Komunikasi Fisika Indonesia Vol 18, No 2 (2021)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.18.2.93-98

Abstract

Pertumbuhan industri yang sangat pesat di Desa Rimbo Panjang memberikan dampak negatif terhadap lingkungan. Industri SPBU dapat menimbulkan dampak pada pencemaran air bawah tanah karena peristiwa kebocoran pada penampungan  maupun tumpahan. Tingkat pencemaran air akan beresiko lebih besar karena di daerah Rimbo Panjang berlitologi gambut. Metode yang dilakukan adalah survei geolistrik aturan Schlumberger dengan dua lintasan sedangkan untuk menentukan kualitas air bawah tanah digunakan metode geokimia dengan menganalisis parameter kekeruhan, pH, TDS, konduktivitas dan salinitas. Hasil yang  diperoleh dari geolistrik menunjukkan bahwa Desa Rimbo Panjang memiliki lima lapis dengan akuifer berada di lapisan ke lima pada lintasan satu dan lapisan ke tiga pada lintasan dua. Sedangkan nilai parameter kimia, nilai kekeruhan, TDS, konduktivitas dan salinitas tergolong baik namun parameter pH tergolong asam. Sehingga dapat dikatakan bahwa kualitas air di Desa Rimbo Panjang masih belum layak dikonsumsi karena litologi yang gambut dan kegiatan di SPBU tidak berdampak pada lingkungan.
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.
PENGARUH VARIASI SUDUT DATANG DAN SUDUT TANGKAP CAHAYA PADA NILAI KONTRAS CITRA SPEKEL BERAS BERBASIS GUI MATLAB Mahardika Mega Utama; Wiwis Sasmitaninghidayah
Komunikasi Fisika Indonesia Vol 17, No 3 (2020)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.17.3.120-126

Abstract

Rice is the staple food of Indonesian. Rice quality is a factor that needs attention because it is related to consumer health.Checking the quality of rice using digital images can be applied because it is non-invasive, so the rice will be more hygienic. The method of utilizing digital images that can be used for checking the quality of rice is LSCI (Laser Speckel Imaging). This method uses a speckle image, that contrast value is analyzedusingImageJ or MATLAB software. To obtain the optimum speckle image contrast value, the arrival angle (laser angle) and capture angle (camera angle) must be adjusted properly. Obtained angle values that produce the optimum speckle image contrast, are at the arrival angle 40o and capture angle 30o at 60o data capture position. The average of the optimum contrast value is 1.2617 a.u. To simplify the speckle image processing, a speckle image contrast analysis application based on the GUI MATLAB was created. Obtained the measurement accuracy from the application is ranged from 99,99 % to 100.00%.
INTEGRASI CHIRPING DAN APODISASI BAHAN TOPAS UNTUK PENINGKATAN KINERJA SENSOR SERAT KISI BRAGG Khaikal Ramadhan; Saktioto Saktioto
Komunikasi Fisika Indonesia Vol 18, No 2 (2021)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.18.2.111-123

Abstract

Penemuan fiber Bragg grating (FBG) merupakan tonggak awal perkembangan teknologi serat optik, seperti pada komunikasi optik hingga pemantauan struktur kesehatan material sebagai sensor. Untuk komunikasi optik komponen FBG mampu memfilter sinyal-sinyal tertentu. Dalam sensor optik FBG memiliki sensitivitas yang tinggi kebal terhadap interferensi gelombang elektromagnetik, ukuran yang kecil dan tahan terhadap konidis lingkungan yang ekstrim. Sensitivitas sensor FBG diperoleh dari pergeseran puncak panjang gelombang Bragg tiap besaran suhu dan regangan. Walaupun demikian kinerja sensor FBG dapat ditingkatkan dengan merekayasa distribusi indeks bias pada kisi dengan fungsi apodisasi dan chirp. Apodisasi merupakan salah satu teknik dalam meningkatkan kinerja sensor FBG dengan menghilangkan noise, mempersempit full wave half maximum, menurunkan lobus samping dari lobus utama dan memperbaiki factor riak spektrum. Selain apodisasi fungsi chirp juga berpengaruh terhadap sensitivitas sensor dan distribusi indeks bias pada kisi. Eksperimen numerik dilakukan dalam merancang komponen FBG sebagai sensor dengan menggunakan apodisasi Gaussian dan bahan Topas cyclic olefin copolymer untuk beberapa fungsi chirp. Diperoleh hasil bahwa FBG Topas apodisasi Gaussian untuk semua fungsi chirp sebagai sensor regangan memiliki sensitivitas yang sama yaitu 0.84 pm/µstrain sementara untuk sensor suhu diperoleh sensitivitas tertinggi pada cubic root chirp 13,82857 pm/°C diikuti oleh square chirp 13,74286 pm/°C, Quadratic chirp 13,71429 pm/°C dan Linear Chirp 13,4 pm/°C pergeseran panjang gelombang Bragg lebih besar untuk 1 °C daripada untuk 1 µstrain.
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.
IDENTIFIKASI AIR TANAH DI PERUMAHAN GRAHA MUSTAMINDO PERMAI 3 MENGGUNAKAN METODE GEOLISTRIK RESISTIVITAS KONFIGURASI SCHLUMBERGER Teta Emi Sapitri; Usman Malik
Komunikasi Fisika Indonesia Vol 17, No 3 (2020)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jkfi.17.3.150-154

Abstract

Identification of groundwater at Graha Mustamindo Permai 3 Housing Complex, Rimba Panjang Village, District Tambang, Kampar Regency, Riau Province has been done. The method used in this study is the geoelectric method with Schlumberger configuration. Identification of the aquifer layer was carried out on 2 tracking lines with a length of 100 meters. Measurement data were processed using software Progress. The results of data processing of track 1 and 2 show a maximum depth of 35 meters. The results of aquifer interpretation on track 1 are at depth of (3.90–11,13) meters with a resistivity value of 246.51 Ω.m. Track 2 is at a depth of (7.43–14.66) meters with a resistivity value of 142.15 Ω.m. Soil water samples were tested for pH parameters. All water samples have acid levels with an average pH of 5. So that it can cause rust an inner surface of water pipe resulting smelly water therefore the water cannot be consumed by the people.

Page 22 of 39 | Total Record : 390

 20   21   22   23   24 

Filter by Year

2011 2025


Reset
Filter By Issues
All Issue Vol 22, No 2 (2025) Vol 22, No 1 (2025) Vol 21, No 3 (2024) Vol 21, No 2 (2024) Vol 21, No 1 (2024) Vol 20, No 3 (2023) Vol 20, No 2 (2023) Vol 20, No 1 (2023) Vol 19, No 3 (2022) Vol 19, No 2 (2022) Vol 19, No 1 (2022) Vol 18, No 3 (2021) Vol 18, No 2 (2021) Vol 18, No 1 (2021) Vol 17, No 3 (2020) Vol 17, No 2 (2020) Vol 17, No 1 (2020) Vol 16, No 2 (2019) Vol 16, No 1 (2019) Vol 15, No 2 (2018) Vol 15, No 1 (2018) Vol 14, No 2 (2017) Vol 14, No 1 (2017) Vol 13, No 13 (2016) Vol 13, No 12 (2016) Vol 13, No 12 (2016) Vol 12, No 11 (2015) Vol 12, No 10 (2015) Vol 11, No 9 (2014) Vol 11, No 8 (2014) Vol 10, No 7 (2013) Vol 10, No 6 (2013) Vol 9, No 04 (2012) Vol 9, No 5 (2012) Vol 8, No 3 (2011) More Issue