الفهرس 
Objectives of the studyOnly 14 pages are availabe for public view
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Abstract
ithout the support and encouragement of many special people, a Frolect of this size cannot be undertaken. The credit for success in my doctorai studies belongs to my supervision committee. Professors, Shawky Khater and Zakaria El-Sadik guided . me f~i?ri?a: . 12i. tlal.; ui-;structured idea through a coii~pleted dissertatj.on. The valuable suygestions of professor Dan Palmon Speclal thankc for Professors, Mohamed Adel El-Haniy and Ibrahem EL-Sebai for their acceptance to participate in the defense committee. ’The encouragements and comments of Professor Samir EL-Gazzar are appreciated. The helpful of my colleagues, Dr. Hadeya ELHaskash,3r. Modather Abou EL-Khair, Dr. Talaat Abdelazim, and Mr. Ivlohanured El-Fierinawy, during coll-ecting required data are very appreciated. r-2 - - r~n~.i.~.i-\l-c rd c ;f appreciation is due to the staff of Kutgers, Dand, Li~rarya t Newark zampus. Also, the support 2nd cooperation of the computer center staff at Newark campus are appreciated.