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Komunikasi Fisika Indonesia

JKFI
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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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PEMETAAN AIR TANAH PADA LAHAN KERING DI RT 05 DESA MUARO PIJOAN MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI WENNER Eka Nurshafni; Faizar Farid; Samsidar Samsidar; Linda Handayani
Komunikasi Fisika Indonesia Vol 16, No 1 (2019)
Publisher : Universitas Riau

The Study has been done using the geoelectric wenner configuration method in Muaro Pijoan Village, District of Jambi Luar Kota, Muaro Jambi Regency. The purpose of this study were to map the resistivity and determine the ground water position in Muaro Pijoan Village. The study area is divided into 5 tracks, 2 tracks along 100 meters and 3 tracks along 200 meters. Tracks with length 100 meters has space 5 meters and the track with length 200 meters has space of 10 meters. The value obtained from the measurement is the current and potential values, the value is used to obtain the apparent resistivity. The apparent resistivity value is then inverted using Res2Dinv software into 2 dimensional form. The inversion results in 3 cross-sectional resistivity imaged with color and each color indicates a sunder ground resistivity value. Based on the rock resistivity table, ground water has a resistivity value between 30-100 Ω.m. From the cross-sectional resistivity it is found that all tracks have a potential ground water content and the location varies from 2.5 to 34.6 meters below the soil surface. The largest groundwater potential is on track 3 and the smallest is on track 5. Based on its groundwater position in Muaro Pijoan Village includes shallow groundwater.

ANALISA INTERPRETASI POLA ALIRAN AIR BAWAH TANAH KELURAHAN LABUH BARU BARAT KECAMATAN PAYUNG SEKAKI PEKANBARU MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER Krisman Krisman; Citra Siti Fatimah Julianti; Juandi M
Komunikasi Fisika Indonesia Vol 16, No 1 (2019)
Publisher : Universitas Riau

Underground water is one of the important component sources for human being. Study on interpretation of underground water flow has been carried out using Geoelectric Schlumberger Electrode Configuration in Labuh Baru Barat Village, Payung Sekaki District, Pekanbaru. The range measurement was chosen to be 240 meter. The output of measurement arecurrent and voltage. The data, then was inputed into software progress and surfer 11. The output of this computer program is a map of underground waterflow pettern and underground lithology. The results of mapping of the pattern of underground water flow indicate that the direction of water flow from North to South direction, or from Pinang street to Payung Sekaki street. The thickness of the layer start from the first layer that is 4.05 meters and 5.4 meters is a layer of silt- clay, the second layer is 13.07 meters and 14.3 meters is a layer of mud stone, the third layer is 13.07 meters and 15.2 meters is a layer of sand and alluvial and the fourth layer is 51.1 meters and 79.2 meters is layer of gravel sand.

APLIKASI PROGRAM MATLAB UNTUK ANALISA CITRA HYPERSPECTRAL PADA AKAR DARI TANAMAN KELAPA SAWIT YANG MENGALAMI KEKURANGAN AIR Mailestari Wina Yance; Minarni Minarni; Feri Candra; Herman Herman
Komunikasi Fisika Indonesia Vol 16, No 2 (2019)
Publisher : Universitas Riau

Hyperspectral images are three dimensional images which have two dimension spatial information and one dimension spectral information. Hyperspectral image processing using Matlab program is preferable because it is more adaptive for many analysis purposes. This research was aimed to construct Matlab to process and analyze the hyperspectral images of the roots of oil palm plants that have experienced water deficiency. The program was designed and constructed using a GUI . The use of a GUI aims to combine each pixel of the same line from each sample to produce a new image. The samples were roots of oil palm plants that experienced simulated water deficiency by giving different water volumes of 0 mL, 1000 mL, 2000 mL and 3000 mL (normal). The optical method used in this study is a hyperspectral imaging method which has 650 nm diode laser as the light source , spectrograph Specim Imspector V10 , and a monochrome CMOS as a detector. Reflectance intensity versus wavelength was extracted from each images and analyzed. The results showed that the Matlab GUI program that had been constructed was able to produce 1024 new images that had a pixel size of 15× 1280 from each sample. The results also show that the reflectance intensity values are higher at higher water deficiency of the oil palm roots.

PENENTUAN KOMPOSISI KIMIAWI ATMOSFER DAN TEMPERATUR EFEKTIF PADA BINTANG VEGA (α Lyr) DENGAN MENGGUNAKAN METODE SPEKTROSKOPI ABSORPSI Fitri Yuliana; Zulkarnain Zulkarnain; Hakim Luthfi Malasan
Komunikasi Fisika Indonesia Vol 16, No 2 (2019)
Publisher : Universitas Riau

The star spectrum is an information which is though to be a map of the star. The shape of the spectral line actually shows the nature of the star atmosphere, which is the only part researcher can be reached. The intensities of spectral lines will determine the chemical composition of the stars contained in the atmospheres of the stars. The approach used to determine the chemical composition and the effective temperature of the star is spectroscopy. The spectroscopy method had been done in this study using the GAO-ITB RTS telescope system which consisting of the Celestron C11 telescope, NEO-R 1000 spectrograph and CCD SBIG ST-8 camera. The object studied is Vega (α Lyr) star which has a magnitude of 0.00 that the main sequence star of the A0 spectrum class. The image data obtained then be processed using IRAF software to obtain the final spectrum graph with the y-axis representing the flux in erg cm-2s-1 and the x-axis representing the wavelength in units of Å. Furthermore, we match the absorption wavelength on the final spectrum graph to the existing wavelength of the Atomic Spectra Database (ASD) to identify the atmospheric chemical composition of the Vega star. Effective temperature can be calculated by using the Wien shifting laws by find out the maximum wavelength of the final spectrum graph. The most found element in the atmosphere of Vega star was hydrogen (H) that consist of Hε, Hδ, Hγ, Hβ, and Hα. The value of effective temperature of the Vega star is 7136 K that has difference percentage of 22.85 % from the mean temperature of A type star.

PENGARUH WAKTU AKTIVASI TERHADAP SIFAT FISIS DAN ELEKTROKIMIA SEL SUPERKAPASITOR DARI SABUT PINANG Retno Handayani; Erman Taer
Komunikasi Fisika Indonesia Vol 16, No 2 (2019)
Publisher : Universitas Riau

The Carbon electrodes made from areca husk biomass materials have been successfully prepared and characterized. Preparation of carbon electrodes start with the pre-carbonization process, destruction of pre-carbon samples by using Ball Milling and sieving carbon powder for resulting particle size of <53 µm. Pre-carbonized powder is chemically activated using a 0.5 M KOH activator and continued by pellet forming by using Hydraulic Press. The carbonization process was carried out at a temperature of 600 oC using N2 gas followed by physical activation by using CO2 gas with a temperature of 900 oC for 1.5 hours, 2 hours and 2.5 hours. Physical properties analyzed include density, morphological structure and elemental content. The electrochemical properties were analyzed using the cyclic voltammetry (CV) method. The best density analysis result after carbonization-activation is 0.664 in SP-2.5 sample. The highest specific capacitance as high as 17.9 F / g found in the SP-1.5 sample.

PENENTUAN SIFAT MAGNETIK DAN MORFOLOGI PARTIKEL MAGNETIK PASIR BESI PANTAI ARTA PARIAMAN SUMATERA BARAT Ayu Wulandhari; Erwin Erwin
Komunikasi Fisika Indonesia Vol 17, No 1 (2020)
Publisher : Universitas Riau

Telah dilakukan penelitian tentang sifat magnetik dan ukuran partikel dari pasir besi pantai Arta Pariaman Sumatera Barat menggunakan metode Ball Milling. Sampel pasir besi dipisahkan menggunakan Iron Sand Separator (ISS) sebelum dilakukannya proses penghancuran menggunakan Ball Milling dengan variasi waktu 30 jam, 60 jam, dan 90 jam, kemudian dilakukan Ball Milling lanjutan selama 30 jam pada sampel hasil Ball Milling 90 jam dengan ukuran bola yang diperkecil sebesar 0,6 cm. Untuk pemisahan antara partikel magnetik dan non-magnetik pada hasil Ball Milling menggunakan magnet batang Niodinium Iron Boron (NdFeB). Sifat magnetik seperti suseptibilitas magnetik dan suseptibilitas massa dapat diketahui dengan menggunakan sensor Pasco Magnetic Probe PS-2162 dengan kumparan solenoid 2000 lilitan, panjang 10 cm, dan diameter 3 cm, sedangkan komposisi dari pasir besi menggunakan X-Ray Fluorescence (XRF). Ukuran dan bentuk partikel magnetik ditentukan dengan Scanning Electtron Microscope (SEM). Dari penelitian ini hasil ukuran partikel yang didapat sebesar 935 nm untuk waktu Ball Milling 90 jam dan ukuran dalam rentang sebesar 519 nm untuk waktu Ball Milling 120 jam/90 jam + 30 jam, Bentuk partikel pasir besi hampir bulat untuk masing-masing waktu Ball Milling. Kandungan pasir besi sebelum dan sesudah di Ball Milling selama 120 jam yaitu 6,118% dan 67,746%. Suseptibilitas massa meningkat dari 27955,7 X 10-8 m3/kg menjadi 31478,5 X 10-8 m3/kg . Nilai ini berada dalam interval mineral Ilminite (46-80000) X 10-8 m3/kg .

FABRIKASI SENSOR SERAT OPTIK PLASTIK UNTUK DETEKSI ION LOGAM MERKURI DALAM AIR Ida Vaeruza; Kukuh Eka Kurniansyah; Faqih Darma; Ian Yulianti
Komunikasi Fisika Indonesia Vol 16, No 2 (2019)
Publisher : Universitas Riau

The presence of mercury ions is a serious threat to human health and environment. Water consumption containing mercury is very dangerous for human healt. The purpose of this work is to design a heavy metal sensor ion using plastic optical fiber to detect mercury ions in water. The sensor was fabricated by coating the optical fiber by chitosan through dip-coating technique. There are three diameter of optical fiber sensor that was fabricated, which are 1087.64 μm (sensor A), 1691.64 μm (sensor B) and 1736.33 μm (sensor C). Sensor characterization was done by connected the tip of plastic optical fiber to an LED and the other tip was connected to a photodioda. The results show that sensitivity of sample A is 0.32 mA/ppm, sample B is 0.56 mA/ppm and sample C is 0.64 mA/ppm. In terms of respone time, it is shown that thr respon time for sensor A, B and C are 22 s, 42.5 s and 86 s respectively.

PENGUKURAN NILAI INDUKTANSI PELAT ALUMINIUM BERDASARKAN VARIASI KAPASITANSI MENGGUNAKAN MODUL EVB LDC 1000 Cinryani Cinryani; Lazuardi Umar; Salomo Salomo; Maksi Ginting
Komunikasi Fisika Indonesia Vol 17, No 1 (2020)
Publisher : Universitas Riau

The method that has been done in metal thickness measurement is a plate thickness measurement method using an eddy current based sensor. Eddy current sensors can measure the thickness of non-magnetic metal layers through an inductance relationship with variations in thickness where the thickness used for Cu is 0.4 mm, 0.9 mm, 1.5 mm, 2 mm, 4 mm, while Al is used ie 0.4 mm, 0.5 mm, 1 mm, 1.2 mm, 1.5 mm, 1.8 mm, 2 mm, 2.2 mm, 4 mm, 5 mm with a single frequency of 1 Hz with a capacitance value of C0 5 pF. The inductance vs. thickness curve for aluminum and copper has an exponential relationship. The distance between the sensor and non-magnetic material is kept constant at 2 mm. Variations in the value of capacitance C0 used in the measurements are then varied to 100 pF, 200 pF, and 300 pF to see the effect of inductance on the thickness of the plate as a function of the capacitor (C) oscillation.

STUDI AWAL RANCANG BANGUN COLORIMETER MENGGUNAKAN SENSOR OPT101 BERBASIS SISTEM ANDROID DENGAN DISPLAY SMARTPHONE Habibi Putra; Yulkifli Yulkifli
Komunikasi Fisika Indonesia Vol 16, No 2 (2019)
Publisher : Universitas Riau

Colorimeter is a color measuring device that is a tool that can distinguish colors based on the value of the output produced. In this study a colorimeter device was made using the OPT101 sensor, an analog sensor based light detector. OPT101 sensor has characteristics if the intensity of light received is getting brighter, the greater the sensor output value and vice versa. Because of the characteristics of the sensor like that, this sensor can be used as a measuring instrument to determine the concentration of a food coloring agent. This study aims to look at investigating the relationship between the concentration value of a dye solution to the OPT101 sensor response value contained in the colorimeter tool. The dyes used are red (metile red) and blue (brilliant blue) with 10 different variations of concentration, with a range of 0.01% -0.1%. After the measurement experiments were carried out on the sample, the results obtained were almost the same as the theory, namely the relationship between the concentration value was inversely proportional to the value of the sensor output. The inverse relationship means that the more concentrated a dye solution is, the more the light intensity penetrates the substance or dims. So that the OPT101 sensor detects a dimmer light source, the sensor output value gets smaller, because the relationship of the sensor output value is directly proportional to the intensity of the received light. Based on the measurements that have been made, the results of sensor response values are obtained for the red sample with a range of data from 276,698 decreasing to 240,762, while for the blue sample from the range 9,828 it decreases to 8.75. The value for the blue sample is much smaller because the blue sample is much thicker than the red sample.

DETEKSI EFEK GEMPABUMI PADA IONOSFER MENGGUNAKAN DATA GNSS Anwar Santoso; Buldan Muslim; Siti Inayah Fitriyani
Komunikasi Fisika Indonesia Vol 17, No 1 (2020)
Publisher : Universitas Riau

Seismic activities such as earthquakes can cause atmospheric and infrared gravitational waves. If the earthquake happens to be strong enough (M> 6 SR), these waves can spread to the ionosphere altitude in the form of atmospheric and infrasonic gravitational waves. The monitoring system of ionospheric wave that associated with earthquakes from network of GNSS data has been much developed in Indonesia by using the sliding Fast Fourier Transform (SFFT) programfor disturbed ionospheric TEC positions. The results of previous studies, differential TEC showed irregular fluctuations in the order of several tens of seconds until to several tens of minutes with average amplitude less than 0.01 TECU. At times the ionospheric is not disturbed (regular), the amplitude can reaching greater than 0.01 TECU. As a case study, in this paper a methodological examination will be conducted on the events of Aceh earthquake on December 26, 2004 (M = 9.2 SR), Tohoku March 11, 2011 (M = 9 SR) and Yogyakarta May 27, 2006 (M = 6.2 SR).

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Contact Name Usman Malik

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Editorial Address Jurusan FMIPA Universitas Riau Kampus Bina Widya Km 12,5 Simpang Baru Pekanbaru

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Contact Name
Usman Malik

Contact Email
usman.malik@lecturer.unri.ac.id

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+62811756227

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Jurusan FMIPA Universitas Riau Kampus Bina Widya Km 12,5 Simpang Baru Pekanbaru

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