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CPHYSICS
2006
109views more  CPHYSICS 2006»
13 years 9 months ago
Comparison of time splitting and backsubstitution methods for integrating Vlasov's equation with magnetic fields
The standard approach for integrating the multidimensional Vlasov equation using grid based, conservative schemes is based on a time splitting approach. Here, we show that althoug...
H. Schmitz, R. Grauer
FGCS
2006
91views more  FGCS 2006»
13 years 9 months ago
Dynamic provisioning of LightPath services for radio astronomy applications
A demonstration at iGRID 2005 used dynamic, deterministic, and dedicated LightPath network services to link radio telescopes from around the world with computational facilities at...
Jerry Sobieski, Tom Lehman, Bijan Jabbari, Chester...
JC
2008
77views more  JC 2008»
13 years 9 months ago
A numerical algorithm for zero counting, I: Complexity and accuracy
We describe an algorithm to count the number of distinct real zeros of a polynomial (square) system f. The algorithm performs O(log(nD(f))) iterations (grid refinements) where n is...
Felipe Cucker, Teresa Krick, Gregorio Malajovich, ...
SIAMJO
2008
93views more  SIAMJO 2008»
13 years 9 months ago
Recursive Trust-Region Methods for Multiscale Nonlinear Optimization
A class of trust-region methods is presented for solving unconstrained nonlinear and possibly nonconvex discretized optimization problems, like those arising in systems governed by...
Serge Gratton, Annick Sartenaer, Philippe L. Toint
CGF
2004
89views more  CGF 2004»
13 years 9 months ago
Fast Multipath Radiosity using Hierarchical Subscenes
This paper presents an efficient acceleration technique for the global line radiosity Multipath method. In this approach, the scene is subdivided in a hierarchy of box bounded sub...
Francesc Castro, Mateu Sbert, László...