Bolesaaw K. Szymanski

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Data grids provide geographically distributed resources for large-scale data-intensive applications that generate large data sets. However, ensuring efficient and fast access to such huge and widely distributed data is hindered by the high latencies of the Internet. To address these problems we introduce a set of replication management services and(More)
An adaptive technique for a partial diierential system automatically adjusts a computational mesh or varies the order of a numerical procedure to obtain a solution satisfying prescribed accuracy criteria in an optimal fashion. We describe data structures for distributed storage of nite element mesh data as well as software for mesh adaptation, load(More)
Nowadays, almost all text corpora, such as blogs, emails and RSS feeds, are a collection of text streams. The traditional vector space model (VSM), or bag-of-words representation, cannot capture the temporal aspect of these text streams. So far, only a few bursty features have been proposed to create text representations with temporal modeling for the text(More)
Conservation laws are solved by a local Galerkin nite element procedure with adap-tive space-time mesh reenement and explicit time integration. The Courant stability condition is used to select smaller time steps on smaller elements of the mesh, thereby greatly increasing eeciency relative to methods having a single global time step. Processor load(More)
Conservation laws are solved by a local Galerkin nite element procedure with adaptive space-time mesh reenement and explicit time integration. A distributed octree structure representing a spatial decomposition of the domain is used for mesh generation, and later may be used to correct for processor load imbalances introduced at adaptive enrichment steps. A(More)
This paper describes predictive load balancing schemes designed for use with parallel adaptive finite element methods. We provide an overview of data structures suitable for distributed storage of finite element mesh data as well as software designed for mesh adaptation and load balancing. During the course of a parallel computation, processor load(More)
Various research applications using the adaptive solution of partial diierential equations and parallel discrete event simulation as well as the investigation of object oriented programming paradigms are described. This work utilizes the IBM SP2 at Rensselaer's Scientiic Computation Research Center (SCOREC). The software is designed using C, C++ and Fortran(More)
In this paper a grid computing simulation platform, is implemented based on the OSCI TLM-2.0 standard. TLM-2.0 standard, offered as a layer on top of the System library, is becoming a key solution in system level design. The concurrency facility of TLM-2.0 on one side, and its ease of use on the other side, makes it an ideal choice for modeling and(More)
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