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We consider two nonlinear methods for generating uniform pseudo-random numbers in (0, 1), namely quadratic congruential generator and inversive congruential generator. The combinations of the Van der Corput sequence with the considered nonlinear generators are proposed. We simplify the mixed sequences by a restriction of the b-adic representation of the points. We study numerically the b-adic diaphony...
Currently, we are developing an agent based infrastructure for resource management in Grids. In the past our attention was focused on high-level processes involved in agents selecting a team to join or a team to execute a job. In this note we consider how the proposed agent-based system can interact with an actual Grid middleware. As our initial target we have selected the Globus middleware. Here,...
The protein folding problem is a fundamental problem in computational molecular biology and biochemical physics. The high resolution 3D structure of a protein is the key to the understanding and manipulating of its biochemical and cellular functions. All information necessary to fold a protein to its native structure is contained in its amino-acid sequence. Even under simplified models, the problem...
Currently, we are developing an agent-team based infrastructure for resource brokering and management in Grids. In this note we consider how team is supervised and how mirroring can be applied to improve chances of its long-term persistence.
It was shown that block-circulant preconditioners applied to a conjugate gradient method used to solve structured sparse linear systems arising from 2D or 3D elliptic problems have good numerical properties and a potential for high parallel efficiency. In this paper, the convergence rate and the parallel performance of a circulant block-factorization based preconditioner applied to a 3D problem are...
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