Arden Ruttan

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This work has been supported by NSF CDA 9617541, by the Ohio Board of Regents Research Challenge and by Kent State University. 1 Department of Mathematics and Computer Science, Kent State University, Kent, OH 44242, 2 Department of Mathematics and Computer Science, Kent State University, Kent, OH 44242, 3 Physics(More)
When Apriori was first introduced as an algorithm for discovering association rules in a database of market basket data, the problem of generating the candidate set of the large set was a bottleneck in Apriori’s performance, both in space and computational requirements. At first, many unsuccessful attempts were made to improve the generation of a candidate(More)
We examine the scalability and performance of a legacy liquid crystal code on a PC (Beowulf) cluster consisting of 16 dualprocessor Pentium III/450s. This code was originally designed for use on a Unix workstation cluster of less than 8 machines. In particular, we examine the effectiveness of using potentially more efficient techniques such as non-blocking(More)
Using a cluster of computers to run distributed applications imposes a heavy demand on the communication network. In order to improve the communication performance of distributed applications written in MPI, which in turn communicate via TCP, the high speed network must take advangtage of RFC 1323. This paper presents test results to show the increase in(More)
Parallel and high performance computing has enabled great strides to be made in advancing science and solving large problems. However, this progress is limited by the lack of needed tools and the difficulty of programming and running parallel applications. Specifically, there is a lack of needed steering and visualization tools, which can be easily(More)
We will describe a finite difference code for computing equilibrium configurations, of the order-parameter tensor field for nematic liquid crystals, in rectangular regions, by minimization of the Landau-de Gennes Free Energy functional. The implementation of the free energy functional described here includes magnetic fields, quadratic gradient terms, and(More)
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