Grid technologies promise to improve the way we think about e-learning allowing wide-scale learning resources sharing in heterogeneous and geographically distributed environments consenting, in this way, the implementation of distributed learning spaces where different organizations and individuals are able to cooperate in pursuing similar and complementary learning and training objectives. But...

This paper describes the concept of optimistic grid computing. This allows applications to synchronize more loosely and better tolerate the dynamic and heterogeneous bandwidths and latencies that are seen in grid environments. Based on the observed performance of a world-wide grid testbed, we estimate target operating regions for grid applications. Mesh generation is the primary test applicatio...

In this paper we present a new interface for geometry description. This interface is based on four intersection routines. It allows to use geometry description without explicit boundary description, for example using characteristic functions and boolean operations. This seams to be useful especially for time dependent geometries. We show how to create and change this geometry description, and h...

Science Applications International Corporation (SAIC) has developed a novel hazardous dispersion model with support from the Defense Special Weapons Agency. The Operational Multiscale Environment model with Grid Adaptivity (OMEGA) is based on an unstructured prismatic grid. OMEGA has the capability to adapt its grid statically as well as dynamically. The grid can adapt to a set of user defined ...

Grid computing is the key technology of next generation Internet. A promising way of solving the problem of resource allocation in a grid environment is a procedure based upon resource pricing. In Grid Computing Environment, it is very important how to allocate resources for achieving the goal of high effective utilization of resources. This paper targets the problem of resource allocation on t...

A novel approach to unstructured quadrilateral mesh generation for planar domains is presented. Away from irregular vertices, the resulting meshes have the properties of nearly conformal grids. The technique is based on a theoretical relation between the present problem, and the inverse Poisson (IP) problem with point sources. An IP algorithm is described, which constructs a point-source distri...

A new approach to triangular mesh generation based on the molecular dynamics method is proposed. Mesh nodes are considered as interacting particles. After the node placement by molecular dynamics simulation, well-shaped triangles or tetrahedra can be created after connecting the nodes by Delaunay triangulation or tetrahedrization. Some examples are considered in order to illustrate themethod’s ...

In most highly developed electrical power system, there are several difficulties related from generation to distribution. Usually, power generation is located at remote area from the load center. Long transmission and distribution lines have to be constructed and maintained to meet required reliability, power quality and economic point of views. Reliable, cheap, efficient conductor is required ...