Ping Yan was a Ph.D. candidate in the Department of Management Information Systems at the University of Arizona; she graduated in 2010. She received her B.S. in computer science from the University of Science and Technology of China, Hefei, China, and her M.S. in computer science from Chinese University of Hong Kong, Hong Kong, China. She has been working on spatial-temporal data analysis and its application in public health informatics and marketing.