I am a professor at Department of Computer Science, Western Kentucky University. I got a Ph.D in Computer Science from the University of Georgia under the supervision of Dr. Canfield. I also obtained a B.S from Nankai University, China, also in Computer Science. Before I entered the Ph.D program in Department of Computer Science here, I was a graduate student in Graduate School, Chinese Academy of Sciences. From August, 2000 to February, 2002, I worked for Cisco Systems, Inc in the LocalDirector Group.