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vi also need to thank Linda Cox for giving me a thorough explanation of the graduation requirements. I would like to thank Dan Carder, Ryan Barnett, and Wesley Riddle for helping with the testing during the last two hectic months of testing. I would like to thank Cliff Judy for all his help in the shop. He conveyed a wealth of practical information to me over the years, and he always allowed me to use his equipment when necessary. I would like to express my gratitude to Marylin ("Mom") Host and Gene Kopasko for their help with all my purchasing problems and blunders, and for having such great senses of humor. Marylin and Gene, if there are still receipts missing for any of my purchases, they are in the mail. I would also like to thank Richard Atkison for providing help with the automated valve control and wiring. Finally, I would like to express my appreciation to Dr. Al Hoffmanner and Eric Tekrul of Walker, Inc. for providing the stuffing cone and initial trap assembly. vii