Morris Chang for their contributions as my committee members.I especially would like to thank my friends and lab colleagues, in particular Minoh Kang, Jinchun Xia, and Hsin-yi Jiang, for every kind of support they brought to me during my work.I am profoundly thankful for the endless love, trust and support so unselfishly given to me from my mother, Neung-ja Oh, and my father, Woo-koo Kim.Finally, I cannot express how much I love my wife, Jiyon Im, and my daughter, Michelle Caen Kim. I am always happy with them.