ACKNOWLEDGEMENTSAs individuals, we are often molded and shaped by special people who touch our lives and instill value, morality, drive and determination into the fabric of our being.Such individuals often teach us how to be resilient and learn how to find ways to overcome adversity and life's challenges. In this regard, I would like to thank my mother, Millicent for the fortitude, drive, determination and values she instilled in me.These are the qualities that have enabled me to overcome life's challenges and accomplish this goal. I would also like to thank my daughter Kendra for being the bright ray of light that kept me focused on achieving this goal. Special thanks to Annette for her encouragement, and tremendous support.I would also like to thank my advisor, Dr. Radesh Palakurthi for his unwavering support, guidance, assistance, and words of encouragement and most importantly for being an excellent mentor. I would also like to thank the members of my dissertation