Searching Color Images by Emotional Concepts. - Sungyong Hong; Chulbum Ahn; Yunmook Nah; Lynn Choi (Human.Society@Internet, 2005)

Self-describing and Data Propagation Model for Data Distribution Service. - Chungwoo Lee; Jaeil Hwang; Joonwoo Lee; Chulbum Ahn; Bowon Suh; Dong-Hoon Shin; Yunmook Nah; Doo-Hyun Kim (SEUS, 2008)

Location-Aware Web Service by Utilizing Web Contents Including Location Information. - YongUk Kim; Chulbum Ahn; Joonwoo Lee; Yunmook Nah (SEUS, 2009)

Design of Location-Based Web Service Framework for Context-Aware Applications in Ubiquitous Environments. - Chulbum Ahn; Yunmook Nah (SUTC/UMC, 2010)