Danilo Comminiello; José C. Príncipe     

We would like to sincerely thank all the authors who have contributed to this book. They quickly understood the scope of the book and its message and embodied and enhanced these goals in their chapters. Their interest and enthusiasm for this project are critical for the success of this initiative. We took in consideration their advice and suggestions and we appreciated a lot of their efforts in providing high-quality contributions. Without them, this book would never have been possible. We would like also to deeply thank Sonnini Ruiz Yura and Katie Chan from Elsevier for their work and assistance. We also thank all those people who are not directly involved in this book but provided us with precious and invaluable advice.