Detection of Unusually Crowded Places through Micro-Blogging Sites. - Tatsuya Fujisaka; Ryong Lee; Kazutoshi Sumiya (AINA Workshops, 2010)

Monitoring Geo-social Activities through Micro-blogging Sites. - Tatsuya Fujisaka; Ryong Lee; Kazutoshi Sumiya (DASFAA Workshops, 2010)

Discovery of user behavior patterns from geo-tagged micro-blogs. - Tatsuya Fujisaka; Ryong Lee; Kazutoshi Sumiya (ICUIMC, 2010)

Exploring urban characteristics using movement history of mass mobile microbloggers. - Tatsuya Fujisaka; Ryong Lee; Kazutoshi Sumiya (HotMobile, 2010)

Discovering Atypical Property Values for Object Searches on the Web. - Tatsuya Fujisaka; Takayuki Yumoto; Kazutoshi Sumiya (WISM (2), 2011)