Social-network analysis using topic models. - Youngchul Cha; Junghoo Cho (SIGIR, 2012)

Incorporating popularity in topic models for social network analysis. - Youngchul Cha; Bin Bi; Chu-Cheng Hsieh; Junghoo Cho (SIGIR, 2013)

Exploration of the effect of Category Match Score in search advertising. - Youngchul Cha; Junghoo Cho; Jian Yuan; Tak W. Yan (ICDE, 2014)

A universal topic framework (UniZ) and its application in online search. - Youngchul Cha; Keng-hao Chang; Hari Bommaganti; Ye Chen; Tak W. Yan; Bin Bi; Junghoo Cho (SAC, 2015)