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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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RANCANG BANGUN ALAT PENGERING SISTEM ISOLATOR BERLAPIS PAPAN BATU KERIKIL SEBAGAI PENYIMPAN PANAS Juandi M; Ismawan Ismawan; Usman Malik
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

Research on the design of a dryer with an insylation system made of pebble and board for heat storage. This research as conducted using experimental method by making a dryer using biomass energy sources . The objectives of the study were to measurins the heat rate lost from each side of the dryer, the heat energy generated from the combustion of the coconut shell the moisture content of drying wet clothing, the efficiency of the drying time The results showed the design of a dryer with an insylation system made of pebble and board for heat storage works well. The temperature inside the room is ranges from (40-68°C). The total rate of heat energy lost in the 10th minute is 6,527.54 J/s and continued to decrease to 60th minute by 3263.77 J/s. The heat energy rate resulting from the combustion of coconut shells at 10th mins is 10520 J/s and continued to decrease to 60th minute by 1753.33 J/s. Reduced moisture content of wet clothes reached 2.439% at 60 minutes. Efficiency of drying time reaches 85.7%. The efficiency of the average biomass energy source is 90%.

PENGARUH TEMPERATUR AKTIVASI FISIKA TERHADAP KINERJA SUPERKAKASITOR BERBASIS ELEKTRODA KARBON DARI AMPAS SAGU Erman Taer; Zikri Alrifani; Rika Taslim
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

The manufacture of activated carbon based on sago pulp as a super-capacitor cell electrode has been successfully performed. Preparation of activated carbon begins with heating of drying raw materials in the sun and followed by oven drying, pre-carbonization, milling, sieving, chemical activation with 2 M concentration KOH solution, pellet printing, carbonization at 600° C using N2 gas followed by physics activation with temperature variation of 700° C; 750° C; 800° C; 850° C; 900° C using water vapor and polishing of pellets are some of the steps that are followed. Carbon electrode density values for each sample of AC 700, AC 750, AC 800, AC 850, and AC 900 are 0,790 g/cm3, 0,791 g/cm3, 0,795 g/cm3, 0,760 g/cm3, dan 0,754 g/cm3. The SEM results show the shape of the particles formed unoccupied. EDX test results show the percentage of carbon reaches 90.13%. The measurement of electrochemical properties performed by cyclic voltammetry method yielded an optimum specific capacitance of 106 F/g obtained at a temperature of 750° C.

PENGUKURAN KUAT ARUS PADA KAWAT DENGAN MENGGUNAKAN SENSOR MEDAN MAGNET Rahmondia Nanda; Usman Malik; Lazuardi Lazuardi
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

Pengukuran kuat arus secara konvensional dilakukan dengan menggunakan alat ukur yang dipasang seri dengan rangkaian. Tetapi dengan metode sensor magnet, alat ukur kuat arus tidak perlu masuk ke dalam sistem rangkaian. Dengan mendeteksi medan magnet yang terdapat di sekeliling kawat berarus tersebut, besar arus yang mengalir di dalamnya dapat diketahui. Dengan menggunakan hukum ampere yang menyatakan bahwa disekeliling kawat penghantar terdapat medan magnet yang arahnya sesuai dengan kaidah tangan kanan, medan magnet sebanding dengan besar arus yang menghasilkannya, sehingga sensor arus ini merupakan salah satu aplikasi dari sensor magnet. Dalam makalah ini akan dijelaskan prinsip dasar menggunakan sensor medan magnet dalam pengukuran kuat arus.

ANALISIS SUSEPTIBILITAS MAGNETIK TANAH LAPISAN ATAS SEBAGAI INDIKATOR BENCANA LONGSOR DI BUKIT SULA KECAMATAN TALAWI KOTA SAWAHLUNTO Arif Budiman; Dwi Puryanti; Febri Naldi
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

Landslide is a disaster that can harm properties and souls. Losses due to landslide can be minimized if there are known signs of landslide.. In this research, the landslide indicator is known through the analysis of the magnetic susceptibility of topsoil. This research is a case study conducted at Bukit Sula, Talawi District, Sawahlunto City.Soil samples were taken from two locations in Sula Hill, which are vegetated location (location A) and unvegetated location (location B). This research’s samples took with downward vertical of each 100 m was taken with a space range of 5 m, so that is obtained 21 sampling points at each of these locations. Measurement of magnetic susceptibility value using Bartington Magnetic Susceptibility Meter measured at two frequencies, namely low frequency of 0.465 kHz (χLF) and high frequency of 4.65 kHz (χHF). At location A the obtained average value of χLF is 804.05×10-8 m3kg-1while the average value of χHF is 804.25×10-8 m3kg-1. At location B the obtained average value of χLF is 9.85×10-8 m3kg-1, while the average value of χHF is 9.64×10-8 m3kg-1. XRF test result showed that magnetic minerals in samples at both locations a hematit (Fe2O3). Based on the comparison of susceptibility value and concentration of hematite and quartz minerals between sample of location A and location B, it can be said that location B has been eroded. Based on the presence of superparamagnetic grain, the samples taken from location B have finer grains than the samples at location A. Scanning Electron Microscope (SEM) also shows that sample B has finer grains than the sample B. These are because location B is an area without vegetation, causing rain drop directly into the soil and can decrease the level of soil grain attachment. Therefore, location B more likely occurred landslide than location A.

PREPARASI PARTIKEL MAGNETIK DARI PASIR BESI PANTAI BATANG KAPAS SUMATERA BARAT MENGGUNAKAN METODE BALL MILLING Tahayati Ichsan; Salomo Salomo; Erwin Erwin; Usman Malik
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

Preparation of micro magnetic particle and its magnetic propertis from iron sand beach of Batang Kapas west Sumatera using Ball Milling method has been done. Prior to the Ball Milling process, the samples were processed by iron sand separator (ISS) in order to separate between magnetic particles and non magnetic one. Next, the concentrates from ISS were crushed by Ball Milling method as a function of time namely 20, 40, and 60 hours. For separation between magnetic particles and non magnetic one, then NdFeB magnet was utilized. The results showed that the magnetic degree of the sample is about 0,5%. Measurements of magnetic induction solenoids were carried out using a Magnetic Probe Pasco PS -2162 as a function of current (2, 4, 6, 8 and 10) A and a functions of distance (1, 2, 3, 4, and 5) mm. Then the total magnetic induction of the solenoid (solenoid with sample core and concentrate) was measured as a function of an electric current for a fixed distance of 1 mm. The calculation results showed that magnetic susceptibility and mass susceptibility increase with Ball Milling time from (3376,400-7765,130). This value is within the interval of 46-80000 which is the interval of Ilmenite mineral (FeTiO3; Antiferromagnetik). The increase in magnetic susceptibility and mass susceptibility of samples processed by Ball Milling is thought to be due to the increasing number of magnetic particles in the sample.

INTERPRETASI AKUSTIK IMPEDANSI (AI) MENGGUNAKAN DATA SEISMIK DAN DATA SUMUR UNTUK MENENTUKAN ZONA PROSPEK HIDROKARBON Hanum Eko Hapsari; Intan Lestari; Samsidar Samsidar
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

Research has been conducted to determine the prospect of hydrocarbon zones using the interpretation of acoustic impedance (AI) seismic method in Field X, South Sumatra Basin, Jambi Province. The purpose of this study was to determine the AI value on the distribution map of AI values for hydrocarbon prospect zones in Field X. In this study the data used were 3D seismic data with PSTM (Post-Stack Time Migration) type, and well data. Data processing using Hampson and Russell (HRS) software used in the mining and petroleum fields has a function for subsurface modeling below the ground surface of reservoir characterization. Well data will be linked to seismic data so that the well data will be in the actual position. The distribution of hydrocarbon prospect zones in PEV-1 well can be seen first in crossplot analysis at a depth of 1760-1798 m with AI cutoff value indicated as sandstone ranging from 8450 (m s)*(g/cc) and above, with a high correlation value 0.818 time shift 0 ms. Picking horizon is carried out to determine the target zone layer and its continuity laterally on seismic volume so that a model based can be done as an initial subsurface description below the soil surface at PEV-1 well. Then the next step is a post-stack analysis based model to find out how much the error value of the target zone prediction with certain parameters through the PEV-1 well data. So with a correlation value of 0.936429 and an error value of 0.35227 in the post-stack analysis model based, AI inversion in the PEV-1 well layer which is the target zone of the hydrocarbon prospect is indicated by the range of 8450 (m/s)*(g/cc) which is indicated as sandstone.

ANALISIS KOMPENSASI DISPERSI MENGGUNAKAN PENGUAT RAMAN PADA JARINGAN WDM (WAVELENGTH DIVISION MULTIPLEXING) DALAM KOMUNIKASI SERAT OPTIK Roby Ikhsan; Romi Fadli Syahputra; Saktioto Saktioto
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

The discovery of optical fiber cause widespread revolution of communication system. Optical fiber communication has excellency on data transmission speed, security, flexibility, and broadly bandwidth. The applying of WDM network can broaden the bandwidth so that the transmission performance becomes more splendid. Although some factors such as dispersion, attenuation, and scattering can hinder the performance of fiber optic on sending data. Moreover dispersion can wreck data and spread pulse as it travels alongs fiber so that causing interference. There is some methods of dispersion compensation. In this paper, Fiber Raman Amplifier is used on WDM network to strengthen signal which is sent to detector. This research utilize simulation approachment with various bandwidth and length fiber. The results show lowest BER value and highest Q-factor at bandwidth frequency of 30 GHz and fiber length of 20 km.

SINTESIS BAHAN PIEZOELEKTRIK xBZT-BCT MENGGUNAKAN METODE MOLTEN SALT DAN KARAKTERISASINYA Helga Dwi Fahyuan; Oky Lidya Kumala; Nasri Mz
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

The research of synthesized xBZT-BCT piezoelectric material have been carried out by using molten salt method. Piezoelectric material is a material that can generate electrical voltage when given voltage or mechanical strain. This material has the potential to be a good piezoelectric material. In this study, the method used is molten salt. Molten salt utilizes molten salt to speed up chemical reactions during the heating process. The xBZT-BCT material was synthesized with variations of composition 0.48, 0.5, and 0.52 mol and sintering temperature is 850 ° C. The crystalline structure generated by 0.48BZT-BCT sintering temperature of 850 ° C is tetragonal-rhombohedral., respectively. The Morphotropic Phase Boundary area is present in a composition of 0.5 mol.

STRATEGI PENANGGULANGAN KEBAKARAN PADA LAHAN GAMBUT DENGAN MENGGUNAKAN PENDEKATAN EKO-TEKNOLOGI PADA MASYARAKAT PETANI DI DESA RIMBO PANJANG KECAMATAN TAMBANG KABUPATEN KAMPAR PROVINSI RIAU Saktioto Saktioto; Defrianto Defrianto; Riad Syech; Syahril Syahril; Joko Risanto
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

People who care about the environment always reject the use of peat land for large-scale plantation areas, because this can cause an increase in carbon gas and can even cause damage to peat land in Rimbo Panjang Village, Tambang District, Kampar Regency. that there was an event of a land fire which almost hit the residential area in Rimbo Panjang village, Kec. Kampar District Mine on February 24, 2015. That there are complaints from the community in Rimbo Panjang village, Kec. Kampar Regency Mine about environmental conditions or smog. The implementation of Eco-Technology can protect the environment of peatlands to maintain sustainability and avoid fire from peatlands and regulate groundwater management on peatlands.

PENGARUH WAKTU PERENDAMAN TiO2 DALAM LARUTAN EKSTRAK ANTOSIANIN BUNGA ROSELLA PADA KINERJA DYE SENSITIZED SOLAR CELL (DSSC) Rafika Andari; Dona Abrini
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

The use of solar panels is still quite expensive in the making, for it needs to be developed solar panels are cheap based DSSC (Dye Sensitized Solar Cell). The use of DSSC is very good developed in Indonesia which is famous for its biological richness. This study used rosella flowers as photosensitizer obtained from the extraction process in the form of maceration for 24 hours. The components used to construct a DSSC outline can be divided into four parts, namely substrate, dye, semiconductor titanium dioxide (TiO2), and electrolyte. In this research the Ti O2 layer was immersed in a solution of rosella flower extract with different time variations, ie 1 hour, 2 hours, and 3 hours. Light sources used are sunlight and 150 watt halogen lamps. It was found that at 3 hours of immersion using the sunlight source was the best result of maximally current (Imax) 0.3 mA, maximum voltage (V) 582,4 mV and its efficiency 0,258%. The results obtained were lower when the DSSC was given a halogen light source, i.e. Maximum current (Imax) 0.08 mA, maximal voltage (Vmax) 125,6 mV and its efficiency 0,167%. The greater the intensity of the light illumination the greater the output power of the DSSC.The use of solar panels is still quite expensive in the making, for it needs to be developed solar panels are cheap based DSSC (Dye Sensitized Solar Cell). The use of DSSC is very good developed in Indonesia which is famous for its biological richness. This study used rosella flowers as photosensitizer obtained from the extraction process in the form of maceration for 24 hours. The components used to construct a DSSC outline can be divided into four parts, namely substrate, dye, semiconductor titanium dioxide (TiO2), and electrolyte. In this research the TiO2 layer was immersed in a solution of rosella flower extract with different time variations, ie 1 hour, 2 hours, and 3 hours. Light sources used are sunlight and 150 watt halogen lamps. It was found that at 3 hours of immersion using the sunlight source was the best result of maximally current (Imax) 0.3 mA, maximum voltage (Vmax) 582,4 mV and its efficiency 0,258%. The results obtained were lower when the DSSC was given a halogen light source, i.e. Maximum current (Imax) 0.08 mA, maximal voltage (Vmax) 125,6 mV and its efficiency 0,167%. The greater the intensity of the light illumination the greater the output power of the DSSC.

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Usman Malik

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usman.malik@lecturer.unri.ac.id

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