Acknowledgments

First of all, I would like to thank the authors for contributing their excellent chapters to this book. Without their contributions, this book would not have been possible. Thanks to all my friends for sharing my happiness at the start of this project and following up with their encouragement when it seemed too difficult to complete.

I would like to acknowledge and thank the most important people in my life, my grandfather, grandmother, and finally thanks to my wife. This book has been a long-cherished dream of mine which would not have been turned into reality without the support and love of these amazing people, who encouraged me despite my not giving them the proper time and attention. I am also grateful to my best friends for their blessings and unconditional love, patience and encouragement.

Dac-Nhuong Le, PhD

Deputy-Head, Faculty of Information Technology Haiphong University, Haiphong, Vietnam