First of all, I would like to express my overall gratitude to my family. I owe them a large debt of gratitude for their pray, love, support and best wishes.
In addition, as this book is an extended and updated version of my Ph.D. thesis at the University of Nottingham, which was finalised in 2019, I would also like to extend my overall gratitude to my supervisor and mentor Prof Andreas Bieler for his precious support, guidance during this long process.
Furthermore, I am particularly grateful to my dear friends Dr. Ayşe Arslan and Dr. Bilge Şahin, for their invaluable support during this project.
Finally, and most importantly, I am gratefull to my precious wife and my lifelong comrade Eren Ezgi gevher avci.