Acknowledgements

I would like to express my appreciation to Prof. Bruce Land who permitted me to perform this project and organized everything including the permission for computer resources. I would also like to give a special thank to Dr. Chirs Pelkie who helped me to use computer resources. Also, I really appreciate my company (Mitsubishi Electric Corp.) who gave me the chance to study computer science in Cornell University. Finally, I express my special thanks to my wife and son.