I would like to express the deepest appreciation to the MDPI Book staff who made this book project possible in the first place, namely the book series's editor Laura Wagner and the assistant editors Oliva Andereggen and Lea Schneider. Thank you for taking care so thoroughly of the concerns in the areas of lectorate and organization, and for your great patience, sensitivity and endurance throughout the process. Also, I want to thank all the peer reviewers who devoted their time and expertise to this volume. My greatest gratitude goes to the contributors of this book, without whose insights into their research work, innovative approaches and thorough analyses this book would not have become a book.