OF THE UNIVERSITY OF MINNESOTA BY

I am grateful to Prof. Krishnan Mahesh for giving me the opportunity to pursue my doctoral research under his guidance and for his constant support and encouragement. He is patient, attentive and always keen to discuss and address problems. I have learned a lot from his profound knowledge, expertise and experience. My parents Mr. Arun Kumar Verma and Mrs. Meenu Verma, and my sister Aakan-sha are a source of unconditional and constant support, and encouragement. My achieve-ments would not be possible without them. I would especially like to thank Ms. Fiona Ng for being understanding and supportive, and motivating me in my endeavors. My life in Minnesota and the graduate school experience was memorable because of my friends, some of whom are Dr. Abhijit Chakraborty, Dr. Projjwal Banerjee, Dr. Rajes Sau and Amartya S. Banerjee. I have enjoyed working with all my group members who provided helpful advice and good conversations. I would like to thank Dr. Suma