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\author{Hardeep Singh Rai}
\begin{document}
	I am highly grateful to Dr. , Director, Chitkara University, for providing opportunity to carry out this thesis work.
	The constant guidance and encouragement received from my supervisor Sukhjit Singh Sehra, Assistant Professor, Com-
	puter Science \& Engineering, has been of great help in carrying out the present work and is acknowledged with reverential
	thanks. Without the wise counsel and able guidance, it would have been impossible to complete the thesis in this manner.
	I would like to express thanks profusely to Dr. , Associate Professor \& Head (Computer Science \& Engineering) for
	stimulating me time to time. I would also like to thank Dr. , Head of Department (Information Technology) and to entire
	faculty, staff of Computer Science \& Engineering Department. I also thanks my friends who devoted their valuable time
	and helped me in all possible ways towards successful completion of this work.
	I am also thankful to the authors whose works I have consulted and quoted in my thesis work. Lastly, I would also like
	to thank my parents for their years of unyielding love and encouragement. I will always admire their determination and
	sacrifice during my thesis work.
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