**Acknowledgements**

The author would like to thank his esteemed colleagues, Professors Charles Lee and Sam Behseta at California State University in Fullerton, Ms. Navneet Mezcciani and Mr. Garick Lue-chung at The Aerospace Corporation for their continuous support. He also wants to express his deep appreciation to his wife, Thu-Hang Nguyen, for her constant moral support during the process of writing this chapter.
