I would like to express sincere thanks and gratitude to my family for assisting and supporting me as I have worked to establish a second and new education, career and life in Norway. I particularly thank my husband, Jøran Rudi, for his unfailing encouragement and for sharing his technical expertise. I am especially grateful for the positive support I received from my advisor, Einar Petterson, and am thankful for his valuable advice, friendship and assistance.