Implementation of New Services to Support Ubiquitous Computing for Campus Life. - Tack-Don Han; Cheolho Cheong; Jae-Won Ahn; Jong-Young Kim; Hyung-Min Yoon; Chang-Su Lee; Hyon-Gu Shin; Young-Jin Lee; Hyoung-Min Yook; Myoung-Hoon Jeon; Jung Soo Choi; Joo-Hyeon Lee; et al. (WSTFEUS, 2004)

Implementation of New Services to Support Ubiquitous Computing for Town Life. - Tack-Don Han; Cheolho Cheong; Hyung-Min Yoon; Jong-Young Kim; Seong-Hun Jeong; Young-Seung Ryu; Bum-Seok Kang; Hyun-Kyung Kim; Seok-Won Lee; Vason P. Srini; Joo-Hyeon Lee; Young-Woo Sohn; et al. (SEUS, 2005)

Tag Interface For Pervasive Computing - Paper Tag Interface using Imae Code. - Dong-Chul Kim; Jonghoon Seo; Cheolho Cheong; Tack-Don Han (SIGMAP, 2006)

Usability Evaluation of Designed Image Code Interface for Mobile Computing Environment. - Cheolho Cheong; Dong-Chul Kim; Tack-Don Han (HCI (2), 2007)

A Usability Test of Exchanging Context in a Conference Room Via Mobile Device Interactions. - Do-Yoon Kim; Seungchul Shin; Cheolho Cheong; Tack-Don Han (HCI (1), 2007)

Pictorial Image Code: A Color Vision-based Automatic Identification Interface for Mobile Computing Environments. - Cheolho Cheong; Tack-Don Han; Jae-Yun Kim; Taek-Jean Kim; Keechoon Lee; Sang-Yong Lee; Akio Itoh; Yasumoto Asada; Christopher Craney (HotMobile, 2007)

Fast Contour-Tracing Algorithm Based on a Pixel-Following Method for Image Sensors. - Jonghoon Seo; Seungho Chae; Jinwook Shim; Dong-Chul Kim; Cheolho Cheong; Tack-Don Han (Sensors, 2016)