I would like to thank my advisor, Dr. Denise Schmidt-Crawford, for many reasons. She has always been nice to me during the years I have been in my program. I am very grateful for her valuable time and expertise as well as her valuable and detailed feedback when I write research papers, conference proposals, thesis, and more. I have always felt very lucky to have her as my teacher, mentor, and advisor. She did not only become a major professor asking me about my thesis and research, but also asked about my life, baby, and husband along this long journey. It has always been great to feel her warm support with me and my family. I think there is no way to express my gratitude and appreciation for her. I could not have imagined having a better advisor and mentor. Thank you very much Dr. Crawford.