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All Journal Journal of Mathematical and Fundamental Sciences Jurnal Natural
Anike N. Bowaire
Division of Theoretical High Energy Physics and Instrumentation, Faculty of Mathematics and Natural sciences, Institut Teknologi Bandung
Agriculture, Biological Sciences & Forestry Astronomy Chemistry Earth & Planetary Sciences Mathematics Physics

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Hawking Temperature of the Reissner-Nordstrom-Vaidya Black Hole T. Triyanta; Anike N. Bowaire
Journal of Mathematical and Fundamental Sciences Vol. 45 No. 2 (2013)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2013.45.2.2

Abstract

We have derived the Hawking temperature of the Reissner-Nordstrom-Vaidya black hole by the use of both the radial null geodesic and the complex path methods. We have obtained that the mass dependence of the temperature in the Reissner-Nordstrom-Vaidya black hole is not as simple as that in the Schwarzschild black hole, but still we regain the conclusion, as in the case of the Schwarzschild black hole, that a higher Hawking temperature corresponds to a lower mass of a black hole.
INVERSI DATA VERTICAL ELECTRICAL SOUNDING (VES) KONFIGURASI SCHLUMBERGER DI KAMPUNG NAMBON KABUPATEN JAYAPURA MENGGUKAN METODE FIXED-WIDTH THICKNESS DAN METROPOLIS SIMULATED ANNEALING Anike Bowaire; Zakaria Victor Kareth
Jurnal Natural Vol. 19 No. 1 (2023): Jurnal Natural
Publisher : FMIPA Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jn.v19i1.215

Abstract

A Research of inversion of Vertical Electrical Sounding (VES) data of Schlumberger configuration using combination of Simulated Annealing (SA) dan Fixed-Width Thickness methods has been carried out. The fixed-width thickness method was used to objectively determine the number of subsurface layers. The SA method was used because it is stable and the initial model does not have to be at proximity of the actual solution. The inversion results on synthetic data of 3 and 4 layers show a good fit between the sintetik data and inverted model. In addition to the number of layers, the fixed-width thickness method also provides information on the range of depth and resistivity values for each layer whit can be used as input for inversion. The inversion results on synthetic data containing 20% noise indicating that the model and data have a good fit. The level of fit of the method depends on the number of model parameters and the error tolerance. The inversion results on field data in Nambon village, Jayapura district, show that there are 5 subsurface layers. The geological interpretation of these five layers is that the first layer is the top soil layer which is weathered limestone, clay and sand. The second, fourth and fifth layers are limestone of the Jayapura formation (Qpj) with a resistivity range between 923 – 5881 Ωm. The third layer is karst, which may contain groundwater, formed in the limestone of the Jayapura formation.
Co-Authors T. Triyanta Zakaria Victor Kareth