This dissertation is dedicated to my family who make my existence complete: Jolene, my wife, for her patience, love, and support; Aaron and Jeff, my sons, who make me laugh; Lauren and Katie, my daughter-in laws, for their loving kindness; Jack, my grandson, who reminds me how precious life truly is; and In loving memory of my parents (Rodney and Shirley Backlin) and in-laws (Gordon and Lois Thompson).