Leen Ammeraal received his MSc degree in mathematics in 1971 at Delft University of Technology while working as a programmer and technical mathematician in industry since 1960. He did research on the development of compilers at the Mathematical Centre in Amsterdam from 1972 until 1977. He then joined Hogeschool Utrecht to teach mathematics and computer science until his retirement in 1998. He has written 14 books in Dutch and 12 in English on programming and computer graphics. The latter books were published by Wiley and translated into nine other languages. After his retirement he developed and published several applications for Android devices. His home page is at http://home.kpn.nl/ammeraal.Kang Zhang is Professor and Director of Visual Computing Lab, Department of Computer Science at the University of Texas at Dallas. He received his B.Eng. in Computer Engineering from University of Electronic Science and Technology of China in 1982, Ph.D. from theUniversity of Brighton, UK, in 1990, and Executive MBA from the University of Texas at Dallas in 2011. Prior to joining UT-Dallas, he held academic positions in the UK, Australia, and China, and taught many undergraduate and graduate classes for over 26 years. Dr. Zhang's current research interests include visual languages, aesthetic computing, generative art, and software engineering; and has published over 250 papers in these areas. He has authored and edited six books. Dr Zhang is on the Editorial Boards of Journal of Big Data, The Visual Computer, Journal of Visual Languages and Computing, International Journal of Software Engineering and Knowledge Engineering, and International Journal of Advanced Intelligence. His home page is at www.utdallas.edu/~kzhang.
