Thesis Acknowledgements

My sincerest gratitudes and appreciation go to my parents for their faith and unlimited support to me.

I am also greatly thankful to Nourhan Labeeb, whom if it weren’t for her this thesis would have not been been possible.

I also owe it to Prof. Dr. Slim Abdennhader, Eng. Marlien Edward, and DFKI for giving me the chance to work on this project.

I would like to acknowledge and thank my supervisor Ralf Biedert for sharing his expertise and giving me guidance whenever possible. Also, I would like to thank Thomas Kieninger and Jane Bensch for making us feel right at home during our stay abroad.

Finally, I would like to extend my warm gratitude to my colleagues who accompanied me, some of which had agreed to being experimented numerous times — without them it would have never been the same. I would like to specially thank Dalia Badawi, Iman Mansour, Khaled Shokry, Loai Ghoraba, Menna Amer, Mohamed Emad, Mohamed Gad, and Rana Ashraf for their humongous moral support during the tough periods of my stay.