I would like to thank current and past men1bers of the Stillman laboratory for creating an enjoyable and stimulating environment for conducting research. I am grateful to David Stillman for all his direction, guidance, and support. I would also like to thank the members of my thesis committee, David Virshup and Betty Leibold, for their assistance in my research. Finally, special thanks to my family; although they are not here, their love, support, and encouragement are always with me.