Many thanks to my mother, my father, and my sister who are always there for me, for their love, tremendous support and encouragement and to my husband, Ali, for his patience and love. I dedicate this work to my parents and my husband, to gratitude their love, patience and support during these years. Thanks to my precious little Sarah. I am so fortunate to have her, she is the hope in my life. I am grateful to my friends and colleagues and the department faculty and staff for making my time at Texas A&M University a great experience. I also want to extend my gratitude to the members of the Center for Study of Digital Libraries; Anna Zacchi,