Doctoral Thesis of Researcher/ Nahed Samir El Sayed Ali was discussed on Sunday, 8/8/2016. The discussion committee included: prof. Dr. Howayda sadiq abd- Hameed, Prof. Dr. Hanaa abd el Gawad, Prof. Dr. Ibtesam Muhammad Abd el Aal , Prof.Dr. Nawal Muhammad Soliman and Prof. Dr. Mahboba Sobhy abd el Aziz.