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Faculty of Science
Physics Department
Study of Linear and Nonlinear Dust
Acoustic Waves in Saturn F-Rings
A Thesis
Submitted for the Degree of Doctor of Philosophy
in Science -Physics (Theoretical Physics)
by
Mohamed Awad Youssef Elattafi
Supervisors
Prof. Dr. S. K. El-Labany Prof. Dr. M. M. Selim
Prof. of Theoretical Physics, Prof. of Theoretical Physics,
Faculty of Science –Damietta University Faculty of Science –Damietta University
Dr. N. A. El-Bedwehy Dr. H. G. Abdelwahed
Assoc. Prof. of Applied Mathematics, Assoc. Prof. of Theoretical Physics,
Faculty of Science –Damietta University Faculty of Science –Mansoura University
(2017)