ii DEDICATION To My Parents

Michigan-Dearborn. Prof. Su dedicated much of his precious time in giving guidance and provide leadership for this work. He always kept a good track of the progress by arranging weekly and monthly group meetings. His helpful advices, corrections and guidance helped steered me in the right the direction and finished this work successfully. I would also like to thank my fellow lab colleagues. They are always encouraging and helpful. It was an wonderful experience to work with them as a team. I thank all the teachers who have passed me knowledge and equipped me with the essential skills to accomplish this task. Finally, I must express my very profound gratitude to my parents who has consistently provided me with unconditional support and encouragement.