In partial fulfillment of the Requirements for the Degree of

Master of Science

will present his dissertation defense

This project involved re-development of a Fortran 90 system for calculating 3-D seismic coherency using a semblance-based algorithm. The modified version focused on parallel execution on the newly installed Beowulf cluster at the University of Houston Allied Geophysical Laboratories (AGL). After incorporating message-passing capabilities of the Message Passing Interface (MPI), the parallel version carries out computation on one, several, or all processors of the cluster simultaneously. Also, we developed scripts to gather and merge results from multiple nodes of the cluster. The MPI program uses the same input formats as its sequential predecessor and has been shown to produce correct results. The new version significantly reduces execution time when multiple processors are used, from approximately 48 percent (two processors) up to 89 percent (fifteen processors) compared to running on a single processor. We concentrate discussions on design and implementation issues of parallel programs on Beowulf clusters.

Date: Friday, March 2, 2001

Time: 2:30 PM

Place: 550-PGH

Faculty, students, and the general public are invited.

Thesis Advisor: Dr. Olin Johnson