Affiliation: | 1. Dept of Digital Media, Myongji University, 34 Geobukgol-ro, Seodaemun-gu, Seoul 120-728, Republic of Korea;2. Dept of Communication, State University of New York at Buffalo, Buffalo, NY 14260-1020, United States;3. Dept of Communication, State University of New York at Buffalo, Baldy Hall, #359, Buffalo, NY 14260-1020, United States;4. Dept of Interaction Science, Sungkyunkwan University, 25-2 Sungkyunkwan-ro, Jongro-gu, Seoul 110-745, Republic of Korea |