Yuka Yamazaki and Kenji Kumasaka, "Comparative Analysis of the people's character of Japanese prefectures", 4th IEEE International Workshop on e-Activity (IEEE-IWEA2010), Yamagata Japan, August, 2010.
Yuka Yamazaki, Satoshi Itoh, Takashi Iba and Kenji Kumasaka, "Rules and Diversity of Japanese Wikipedia's Growth", Applications of Physics in Financial Analysis(APFA7), Tokyo Japan, March, 2009.
Satoshi Itoh, Yuka Yamazaki, Takashi Iba and Kenji Kumasaka, "Analyzing How Editors Write Articles in Wikipedia", Applications of Physics in Financial Analysis(APFA7), Tokyo Japan, March, 2009.
Yuka Yamazaki, Takaichi Ito, Takashi Iba and Kenji Kumasaka, "Growing Patterns of Wikipedia's Networks: Analyzing Laws and Diversity in Japanese Wikipedia", poster, International Workshop and Conference on Network Science '08(NetSci'08), Norwich UK, June 2008.
Yuka Yamazaki, Takaichi Ito, Takashi Iba and Kenji Kumasaka, "Diversities in Wikipedia's growing patterns", Fourth Joint Japan-North America Mathematical Sociology Conference, CA U.S., May 2008.
Takaichi Ito, Yuka Yamazaki and Tetsuya Onoda, "Finding "Weak-Ties" via Structuring The Manga Phenomenon Based on Readers' Cognition of Manga Artists", Fourth Joint Japan-North America Mathematical Sociology Conference, CA U.S., May 2008.