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Acknowledgments I would like to dedicate this book to my loving wife, Miwa, and our sons, Yu, Sho, and Kou. Moreover, I would like to express my gratitude to the continuous support from my loving parents, my father Nobuyuki and my mother Yayoi. I would like to offer my special thanks to my mentor, Dr. Hitoshi Tsuchihashi, and my best comrades, Dr. Y. Hayashi and Mr. T. Murata. Lastly, I am deeply grateful to all the people who have helped me with the preparation of this book. xiii Acknowledgments