Doctoral Dissertation of the Researcher \ Heba Salah El Din Soliman Salem will be discussed on Thursday, 14\4\2016. The Discussion committee includes Prof.Dr.Helmy Ahmed Zaky, Prof.Dr.Ismael Abd El Hafeez Radwan, Prof.Dr. Ashraf Awad Abd El Tawab, Prof.Dr.Ahmed Mohamed Amar and Prof.Dr.Mokhttar Abd El Hakim Abd El Aziz.