Acknowledgement

I would like to thank those who have made this dissertation possible.

Thank you to my advisory committee: Dr Anjali Sharma, (primary advisor) and Ar. Venus Kashyup (internal advisor) at Indira Gandhi Delhi Technical University whose patience, guidance and encouragement were invaluable.

This research paper has been an experience of learning regarding a subject that has fascinated me for quite a long time.it has been a result of labour, help and support from large number of people. The success and final outcome of the research required a lot of guidance and assistance and guidance from many people and I am fortunate enough to have got all this to complete my dissertation.

I take this opportunity to express my profound gratitude to Ar. Venus Kashyup for exemplary guidance, monitoring and all support and also for providing me the required bookand research papers required for theoretical research. Thank you to my parents who were not only supportive but at times, almost insistent on supporting my work, to my friends and office colleagues who helped me in conducting my BUS survey. And last, but most certainly not least, the dissertation committee for encouraging and allowing me the time to complete this work.