Achieving and completing my dissertation would not have been possible without the support and guidance of many people. First, I would like to express my sincere appreciation to my dissertation advisor, Dr. Woody Kim, for all of his support, supervision, excellent guidance, inspiration, and friendship throughout the dissertation process. I also wish to note my deep appreciation and respect to Dr. Jerrold Leong, my dissertation chair, who devoted himself to my academic process. He has always given me kindness and encouragement. The members of my dissertation committee, Dr. Radesh Palakuthi and Dr. William D. Warde, have generously given their suggestions and overwhelmingly positive comments on my dissertation. This dissertation could not have...