I would like to express my deep appreciation to my supervisor, Dr. Edward Kerr, for his continuing support during my implementation process. With his profound academic knowledge and professional working manner, Dr. Edward Kerr has given me many constructive comments and valuable suggestions, which have helped improve the quality and the progress of this work considerably.

Moreover, I also want take this opportunity to extend my gratitude to other lecturers in the course, who have equipped me with useful knowledge and skills to deal with a research of this significant size. I believe that these knowledge and skills will continue to help me in my research interest as well as professional career in the future.

Last but not least, I would like to express my sincere thanks to my family and friends for their unconditional love and support. It is their frequent encouragement during my process of implementing this dissertation that has played as the spiritual foundation and given me the strength to fulfill this challenging task and make it such a success.