David Q. Liu is an Associate Professor of Computer Science at Purdue University Fort Wayne and a Senior Research Scientist at the Purdue Rosen Center for Advanced Computing, Indiana, USA. He obtained his Ph.D. in Computer Science and Engineering from The Ohio State University, Columbus, Ohio, USA. Before joining academia, he worked as a principal software engineer and research scientist at Motorola, IBM, Lucent Technologies, and various start-up companies in Ohio and Massachusetts, USA.