Ministry of Higher Education ‫الرحيم‬ ‫الرحمن‬ ‫هللا‬ ‫بسم‬ ‫وما‬ ‫ربنا‬ ‫عند‬ ‫من‬ ‫كل‬ ‫به‬ ‫أمنا‬ ‫يقولون‬ ‫العلم‬ ‫في‬ ‫(والراسخون‬ ) ‫االلباب‬ ‫أولو‬ ‫اال‬ ‫يذكر‬ ‫العظيم‬ ‫هللا‬ ‫صدق‬ / ‫عمران‬ ‫ال‬ ( 7 )

Scientific Research, Olaa Najim, Lec Jenan Atiya
Dedication To my dear parents for their understanding.To my brothers and my sisters. ii Acknowledgements Word are not enough to express how grateful I am to my supervisor, Mrs. Jenan Atiya her comments and precious guidance have been indispensably valuable .