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I want to dedicate this work to my parents and sister for their continuous guidance, encouragement, prayers, love and support throughout my life. I would like to thank Anand k Chamakura, my fellow M.S. student without whose help I would still be toiling trying to solve some complex design problems. I would like to thank all my friends especially Inhyouk Song, Tinghui Xin, Kopparthi Sunitha, Yernagula Jagdish, Ripan Das and Chuang Zhang for their helpful discussions and suggestions. There aredoi:10.31390/gradschool_theses.1465 fatcat:2kyxydsb5janpe7uvysz3eyzo4