Jieun Sung is a doctoral student of Telecommunication, Information Studies, and Media in Michigan State University. She is presently working in the Usability/Accessibility Research and Consulting at MSU as a research assistant. She frequently presented at conference, and published papers related with social media usage (e.g., social network game, Twitter, etc), new media usage (e.g., mobile contents usage, mobile interactivity, mobile advertising adoption, etc) and usability (e.g., emotional usability, mobile usability, etc). Her major research areas are usability & accessibility, interactivity, new media usage and effect, new media adoption and, in a bigger picture, HCI.