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Usman Malik
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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 13 Documents
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Search results for , issue "Vol 16, No 1 (2019)" : 13 Documents clear
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (241.098 KB) | DOI: 10.31258/jkfi.16.1.1-7

Abstract

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.
SIMULASI POLA ALIRAN FLUIDA DALAM DAERAH DENGAN BATAS TIDAK TERATUR MENGGUNAKAN METODE ELEMEN HINGGA Defrianto Defrianto; Dwi Putri Cahya Safitri
Komunikasi Fisika Indonesia Vol 16, No 1 (2019)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (337.059 KB) | DOI: 10.31258/jkfi.16.1.70-74

Abstract

Research of ideal fluid flow on irregular domain by variation mesh has been done. Laplace equation was used to model velocity potential and the gradient was used to velocity. Boundary condition for inlet was chosen to be 15 , while for outlet was 30  and Neumann boundary condition on lateral side. The developed model shows that uniform flow was happened on straight channel and free vortex on the curved one. The analytical and computational calculation has similar results, that is 23.7787  and 23.7792  The percentage of the difference is 2.8  wich is very small, therefore this method is accurate enough to model pattern of ideal fluid flow on irregular domain.
ANALISA PENGARUH GAYA ELEKTROSTATIK PADA SPEKTRUM PENCITRAAN RESONANSI MAGNETIK (MRI) DALAM JARINGAN BIOLOGI Salomo Salomo; Nova Lestari; Muhammad Hamdi
Komunikasi Fisika Indonesia Vol 16, No 1 (2019)
Publisher : Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (125.473 KB) | DOI: 10.31258/jkfi.16.1.8-11

Abstract

A study of magnetic core resonance imaging modeling of biological tissue has been carried out in analyzing the effect of electrostatic forces with computational approach. This analysis aims to look at the effect of electric and magnetic force on the spectrum of breast cancer tissue. Physical parameters were determined using the modeled wave equation with the application of mathematical wolfram software 9. Computational or modeling results obtained 6 variations of the MRI spectrum showing the peak magnitude of the electric and magnetic spectrum changes by varying the resolution and distance. This is evidenced from the maximum resolution range ie the peak of the electric field spectrum at amplitude 25 a.u is at a concentration of 5 ppm. Resolution of spectrum peak medium is at concentration of 3-4 ppm whereas minimum resolution has 4 peak spectrum that is at concentration 1-2 ppm, 2-3ppm, 3-4ppm and 4ppm. the result of MRI spektrum for distance variation resulted in spectrum change, further reduced the distance then the mri spectrum in magnetic and electric field approaching spin 1.

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