Context-aware photo selection for promoting photo consumption on a mobile phone. - Youngwoo Yoon; Yuri Ahn; Geehyuk Lee; Sungmoo Hong; Minjeong Kim (Mobile HCI, 2008)

An LED display using active reflectors and free-space optical transmission. - Geehyuk Lee; Yuri Ahn (SIGGRAPH Posters, 2008)