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Supardiyono
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SIMULASI PENDEKATAN FIXED RANDOM WALK DALAM ANALISIS DISTRIBUSI POTENSIAL LISTRIK PADA PELAT BERHINGGA Supardiyono, ; Gagus Ketut Sunnardianto,
Matematika dan Sains Vol 16, No 1 (2009)
Publisher : Matematika dan Sains

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The electric potential distribution was needed to determine the electrical field intensity and total charge in the condensator. This paper discussed the simulation of fixed random walk to analyze the electric potential distribution at unlimited plate using the matlab 7.1 program. The Procedure were carried out as follow: drawing configuration of two dimensional plate, determining the boundary condition, grid, and the sum random walk. Accuracy of the Monte Carlo method in fixed random walk approach were determined by the sum random walk (N), grid (Ä), and right of model system. The results obtained from the fixed random walk simulation closed with the analytic result. The presence of electrical potential value in interior plate area showed just there was one probably potential distribution for specific requisite limit of configuration.
ANALISIS DATA SEISMOGRAM YANG DIREKAM DI STASIUN XMI Arizza Darwis J., ; Supardiyono,
Matematika dan Sains Vol 16, No 2 (2009)
Publisher : Matematika dan Sains

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The aims of research is to verify the earth crustal model through seismogram analysis of earthquake at the Sunda strain at 19 July 2006 10:57:36.8 UTC and to know the depth of upper layer (km), wave speed P (Vp), wave S (Vs) and medium density (Rho). Seismogram data was take from one station (XMI.AU) around epicenter which has distance of 436.4950 km from earthquake centre. The all data were analyzed using waveform 3 component and invertion method. The results of research showed that correlation and varian of reduction between observation seismogram and syntetic of earth crustal model producing as much as 91% and 82,67 %, respectively. The depth of first, second, thirth, fourth, and five layers were 1 km, 1 km, 3 km, 11 km and 17 km, respectively. The value of correlation and reduction varian resulted were better than the other earth crustal model. It showed that the earth crustal model used at around XMI station has high validity.
Co-Authors Arizza Darwis J. Gagus Ketut Sunnardianto