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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 15 Documents

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Search results for , issue "Vol 15, No 2 (2018)" : 15 Documents clear

ANALISA PENGARUH FILTER WARNA DAN DAYA LAMPU FLUORESCENT TERHADAP KELAJUAN NYAMUK Gita Rahayu; Saktioto Saktioto
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

Mosquitoes are insects that can cause dangerous problems to human health. Therefore, mosquitoes need to be identified based on its motion so it can stay away from human. The purpose of this research is to investigate the effect of power and color spectrum of lamp toward mosquito speed. This research used optical method based on light beam that affected mosquitobody. This research designed a radiation system inside a glass box with thickness of 0,5 cm size (30x7x20) cm. Five mosquitoes were irradiated by light from fluorescent lamp with power 11 Watt and 26 Watt that have been filtered using red, orange, yellow, green, blue and purple color plastics. The radiation process was recorded using a digital camera about 26 minutes. The recorded video was processed using Tracker program. The Tracker program analyzedthe mosquito speed based on its displacement from one to another position. The results showed that mosquito highest speed at unfiltered light, red, blue and purple colors occurred when irradiated with 26 Watt lamp while at color of orange, yellow and green occured when irradiated with 11 Watt lamp. Mosquitoes highest speed value when irradiated by orange, yellow and green are 0,632 m/s, 0,693 m/s and 0,645 m/s. Mosquitoes lowest speed value when irradiated by blue and purple light are 0,308 m/s and 0,285 m/s. The speed of the mosquitoes when irradiated by red and unfiltered lights are 0,517 m/s and 0,541 m/s respectively. The data showed that mosquitoes moved away from light source when irradiated by unfiltered lights, red, blue and purple while mosquitoes approached the light source when irradiated by orange, yellow and green light.

FASIES KUARTER VULKANIK DAERAH PAGAR JATI DAN SEKITARNYA, KAB.BENGKULU TENGAH, BENGKULU Aditya N.P.H; Oke Aflatun; Idarwati Idarwati
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

The Jati Fence Area, Bengkulu is the fore arc basin area whose deposition is influenced by the volcanic event. The deposition event took place on a quaternary volcano that has been active in having sedimentation activities that continue. This study aims to carry out mineralogical analysis in the proximal facies deposit area with petrographic data at observation locations (LP) 14, 59, 81,108, and (ST) 14,70 which are sourced from the results of local geological mapping. In LP 81 and 14 with proximal facies have volcanic breccia lithology with compilation components which are dominated by andesitic rocks, pyroclastic matrix composition, packed packing, hard hardness, and mineralogicalcomposition which tend to have many crystals. In LP 59 and 108 proximal facies found andesite lava.

PENENTUAN STRUKTUR TANAH SEBAGAI DASAR UJI KELAYAKAN KEKUATAN BANGUNAN PERUMAHAN DI MUARO JAMBI MENGGUNAKAN METODE GEOLISTRIK KONFIGURASI DIPOLE-DIPOLE Muhammad Ikhsan; Faizar Farid; Samsidar Samsidar; Linda Handayani
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

This research describes the foundation standard in Muaro Jambi. The objective is to determine the subsurface structure as well as to determine the suitable foundation standards for residential buildings in Muaro Jambi. In this study, data collection is divided into 2 residential places, the first in the housing Arza Griya Mandiri and Griya Sungai Duren Indah housing. Each housing will be taking 3 geolistrik data with path length 160 m and datum point as much as 69 datum. The result of field data obtained in the form of voltage value and current value, this value is inputted into Microsoft Excel software and searched for obstacle value and ρa. Datum point value, space electrode, layer, and value ρa are combined and input into notepad software to be processed using Res2DINV software. The results show that the foundation has been built almost in accordance with soil structure and foundation of soil obtained from the research. A suitable soil layer to build a foundation is a rocky clay layer where in this study the depth of this layer varies from 1.71 m to 18.4 m.

ANALISIS NILAI PERCENTAGE DEPTH DOSE(PDD) TERHADAP VARIASI KEDALAMAN TARGET DAN LUAS LAPANGAN PENYINARAN MENGGUNAKAN PESAWAT LINAC-CX Dian Milvita; Alimin Mahyudin; Vinny Alvionita
Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

Percentage Depth Dose (PDD) value measurement is done by varying the target depth and field size. The study was carried out with variations in target depth of 0 cm to 30 cm with 1 cm intervals and fields size ranging from (5x5) cm2 to (39x39) cm2 with intervals (2x2) cm2. PDD is a comparison of the radiation dose at a depth to the radiation dose at the maximum depth normalized by percentage. This study was also conducted to determine the value of radiation doses received by phantoms from the PDD measurement value. This research used 2 photon energy beam that is 6 MV and 10 MV. This study uses water phantom as a substitute for patients with radiation source technique Source Surface Distance (SSD). PDD measurements were performed using a chamber ionization detector. The results obtained showed that the number of radiation doses received by fantom increased to the maximum depth (zmax). After passing zmaks, the radiation dose received by the phantom has decreased. Likewise along with the increase in the amount of radiation field, the value of radiation doses received by phantoms will also increase.

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.

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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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kfi@ejournal.unri.ac.id

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

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