This paper treats boundary conditions on black hole horizons for the full 3+1D Einstein equations. Following a number of authors, the apparent horizon is employed as the inner boundary on a space slice. It is emphasized that a further condition is necessary for the system to be well posed; the “prescribed curvature conditions” are therefore proposed to complete the coordinate conditions at the ...

In MANET, a major necessity to distribute the communication between nodes is that each node should work along with each other. This communication could face many obstacles created by adversary resulting in disconnection. To overcome this problem a new mechanism based on dynamic source routing (DSR) which could be mentioned as cooperative bait detection scheme (CBDS). It merges the favors of bot...

In this paper, we calculate the analytical solutions for radii of planar and polar spherical photon orbits around a rotating black hole that is associated with quintessential field cloud strings. This includes full treatment quintic describes on equatorial plane. Furthermore, The radial profile impact parameters studied corresponding to extreme cases are derived. For more general cases, also di...

Film cooling is widely applied as an effective way to maintain the turbine blade temperature at acceptable level. The present paper investigates overall effectiveness and flow structure by performing conjugate heat transfer simulations for flat-plate baseline cylindrical three cratered film-cooling holes. in fluid domain obtained using Shear Stress Transport turbulence model, solid conductivity...

We study the string propagation in the 2+1 black hole anti de Sitter background (2+1 BH-ADS). We find the first and second order fluctuations around the string center of mass and obtain the expression for the string mass. The string motion is stable, all fluctuations oscillate with real frequencies and are bounded, even at r = 0. We compare with the string motion in the ordinary black hole anti...

In this paper, Gaussian and elliptic high pass filters are analyzed for image sharpening qualitatively and quantatively . The filters are implemented in frequency domain using matlab software. Experiments are performed to compare the performance of both the filters ,processed images are presented. The results demonstrate that elliptic yields better results.

in this paper, gaussian and elliptic high pass filters are analyzed for image sharpening qualitatively and quantatively . the filters are implemented in frequency domain using matlab software. experiments are performed to compare the performance of both the filters ,processed images are presented. the results demonstrate that elliptic yields better results.