My nephew Laddan Acknowledgements

First and foremost, I would like to thank my advisor Dr.Shirish K.Shevade for his constant support and encouragement. I gratefully recollect all the hardships he underwent to read my 'legible handwritten ' results and the patience he had to make me understand the concepts. It was great learning experience under him. I would also like to thank Prof Matthew Jacob.T for his continued guidance throughout my stint at IISc. I will be mistaken if I miss to thank Prof.R.Govindarajan who upheld all my demands that I took to him however small or big they are. I would like to thank Naimisha, Joth, Sivagama Sundari, Garima whose company made my life here enjoyable one. A special mention about Shijesta who helped me in every regard right from the beginning of my life at IISc and about Sreepathi for his help with Linux and allied stu®, amidst their busy schedule. I would also like to extend my sincere gratefulness to all my SSL labmates for making this work really computational with their maintained patience when my processes occupied their CPU, delaying their work. I am also grateful to o±ce people like Sekhar and Mallika without whom none of the formal procedures would have been completed. Last but not least, I owe a lot to my parents and my Sis, who wonderfully handled my fragility durin