ACKNOWLEDGEMENTS

1
ACKNOWLEDGEMENT I wish to express my gratitude
and thanks to Prof. Dr. Nabawia El-Ramly for
her kind supervision, feeding me with up-to-
the- minute information on their latest and
greatest papers and books, and her helping in
more critical situations during the search time.
A special word of gratitude as expressed to
Prof. Dr Hany Harb for suggesting this research
point, sincere guidness, offering facility and
his valuable advice. I would like to thank Dr.
Abd-Elaziz El-Shrbiny for helping me in
collecting the background of the research and his
good review. Thanks to my family (specially my
wife) for its support encouragement, patience,
and love. Even after long days of hard work, she
still accepts my crankiness. She is my world.
Thanks for my late father and mother who hoped
to see me in this situation. Finally, I would
like to thank my professors and all friends in
my department specially Omar Essa and Said Basl.