Add to ORKGI want to give my thankfulness to those who have supported me during my two-year study at the Manship School at Louisiana State University. I would not have had this thesis done without them. First, I would like to show my gratitude to Dr. Renita Coleman. Her fun and humorous personality makes writing thesis such a joyful task. She is not only a great teacher but also a wonderful friend. I would also like to thank my other committee members, Dr. Xigen Li and Dr. Ralph Izard. Dr. Li always encouraged me to have persistent research toward the truth. His advice has given me so much support throughout my master’s studies. Dr. Izard is also my graduate advisor. He has offered me so much help on my study as well as my life. His kindness has made ...