Publisher's Synopsis
The biggest thanks are due to my supervisor Dr. Vivek Kumar Sharma; he until the end of time supported my technical endeavours and was, and will be, the resource of encouragement for my research as well as for my life. His nonstop belief in my effort and his important viewpoint were very constructive in the course of this learning.
I would like to thank Dr. Harish Sharma for his incessant support, interesting discussions and helping me right the way through all the phases of the doctoral research work. I would like to thank Prof. Shiv Kumar for his valuable suggestions. I have to show gratitude the Jagannath University for the support of my studies as well as for the organization.
I would also like to thank my parents and my son Toshan. Their regular support and adore, and knowing that they are for all time there for me in every circumstances makes my life, a lot easier. What is more, my parents taught me the ethics and the love for a scholarly confront that I have now, for this I am also to a great extent thankful to them.
I would like to express my gratitude and love to my wife Rajani whose dedication, love, and assistance made this work possible. She has been the best partner in my journey to the research work.
On a final note, I would like to express appreciation to all the people who directly or indirectly supported me; furthermore, their company and friendship lit some shady and easier said than done moments in the path of my research.
