Yoshiyuki Takeda, Ph.D.
Assistant Professor,
Institute of Engineering Innovation,
The University of Tokyo

Research Interest
Information Retrieval, Cross-Language Information Access, Web Mining, Structurization of Knowledge based on Network Analysis, Regional Innovation System

Education
Received B.S. in Eng. from Toyohashi University of Technology in March 2000.
Received M.S. in Eng. from Toyohashi University of Technology in March 2002.
Received Ph.D. in Eng. from Toyohashi University of Technology in March 2005.

Experience
January 2000--February 2000:
Design, building of search engine in Multimedia and Communications Technology Group, Systems and Electronics Research and Development Center, Sumitomo Electric Industries, LTD. (Internship)
November 2002--February 2003:
21th COE(Center Of Excellence) Researcher in the Department of Engineering, Toyohashi University of Technology.
April 2003--June 2003:
Design, building of indexing/search system in Satoshi Sekine's Laboratory in New York University.
August 2003--September 2003:
Design, building of indexing/search system in Satoshi Sekine's Laboratory in New York University.
April 2005--November 2005
Research and Education in Toyohashi University.
November 2005--March 2006
Research Associate, Research and Education in Tokyo University.
April 2007--:
Assistant Professor, Research and Education in Tokyo University.

Projects
July 2000--November 2001:
Mito Software Souzo Jigyo, Information-technology Promotion Agency, Japan in 2000,
Development: Automatic Keyword Extraction System from Untrodden Text Collection,
Developer: Kyoji Umemura (Eiko Yamamoto, Yoshiyuki Takeda, and Michiko Tanaka).
May 2000--March 2001:
NTCIR Workshop 2,
Participating Member: Kyoji Umemura, Yoshiyuki Takeda, Michiko Tanaka, Lin Feng, Eiko Yamamoto.
April 2001--November 2002:
Mito Software Souzo Jigyo, Information-technology Promotion Agency, Japan in 2001,
Development: The System for Building Thesaurus from Untrodden Text Collection,
Developer: Kyoji Umemura, Eiko Yamamoto, Yoshiyuki Takeda, Aki Sanada, Kenji Suzuki, Takashi Funatomi.
September 2001--October 2002:
NTCIR Workshop 3,
Participating Member: Yoshiyuki Takeda, Kyoji Umemura, Eiko Yamamoto.

Selected Publications and Papers
Naoki Shibata, Yuya Kajikawa, Yoshiyuki Takeda, Katsumori Matsushima. Detecting Emerging Research Fronts Based on Topological Measures in Citation Networks of Scientific Publications Technovation, in press.

Masahiro Hashimoto, Yuya Kajikawa, Yoshiyuki Takeda, Naoki Shibata, Sakata Ichiro, Matsushima Katsumori. A study on the Roles and Functions for the Japanese Research Universities in Regional Innovation Networks. the Intellectual Property Association of Japan, in press. (In Japanese)

Yoshiyuki Takeda, Shiho Mae, Yuya Kajikawa, Katsumori Matsushima. Nanobiotechnology as an emerging research domain from nanotechnology: A bibliographic approach.　Scientometrics, in press.

Yuya Kajikawa and Yoshiyuki Takeda. Structure of research on biomass and bio-fuels: A citation-based approach. Technological Forecasting and Social Change, in press.

Yoshiyuki Takeda, Yuya Kajikawa. A bibliometric approach to optics to detect emerging research domains and intellectual bases.　Scientometrics, in press.

Yuya Kajikawa, Junta Yoshikawa, Yoshiyuki Takeda, Katsumori Matsushima. Tracking emerging technologies in energy research: toward a roadmap for sustainable energy. Technological Forecasting and Social Change, in press.

Yoshiyuki Takeda, Yuya Kajikawa, Ichiro Sakata, Katsumori Matsushima. An analysis of geographical agglomeration and modularized industrial networks in a regional cluster: A case study at Yamagata prefecture in Japan. Technovation, Vol. 28, No. 8, pp. 531-539, August 2008.

Ichiro Sakata, Yuya Kajikawa, Yoshiyuki Takeda, Masahiro Hashimoto, Katsumori Matsushima. An Analysis of Industrial Networks in a Regional Cluster: A Case Study of the Food and Tourist Industries at Okinawa Prefecture Development Engineering, Vol. 14, pp. 23-36, June 2008.

Yuya Kajikawa, Junko Ohno, Yoshiyuki Takeda, Katsumori Matsushima, Hiroshi Komiyama. Creating an academic landscape of sustainability science: an analysis of the citation network. Sustainability Science, Vol. 2, No. 2, pp. 221-231, October 2007.

Ichiro Sakata, Yuya Kajikawa, Yoshiyuki Takeda, Masahiro Hashimoto, Naoki Shibata, Katsumori Matsushima. Network Dynamics in the twelve Regional Clusters. RIETI Discussion Paper, Series 07-J-023, pp. 1-41, May 2007.

Ichiro Sakata, Yuya Kajikawa, Yoshiyuki Takeda, Naoki Shibata, Masahiro Hashimoto, Katsumori Matsushima. Structural Analysis of the Hokkaido Agri-Bio Network. Development Engineering, Vol. 13, pp.31-43, June 2007. (In Japanese)

Kenta Nagamachi, Yoshiyuki Takeda, Kyoji Umemura. A Keyword Extraction Method by Document Expansion. Journal of Natural Langage Processing, Vol. 14, no. 1, pp. 67-86, January 2007. (In Japanese)

Ichiro Sakata, Yuya Kajikawa, Yoshiyuki Takeda, Naoki Shibata, Masahiro Hashimoto, Katsumori Matsushima. Regional Knowledge Networks of Corporations, Universities and Public Institutions. RIETI Discussion Paper, Series 06-J-055, pp. 1-28, October 2006. (In Japanese)

Yoshiyuki Takeda, Kyoji Umemura, and Eiko Yamamoto. Determining indexing strings with statistical analysis. IEICE Transactions on Information and Systems, Vol. E86-D, No. 9, pp. 1781-1787, September 2003.

Eiko Yamamoto, Yoshiyuki Takeda, and Kyoji Umemura. An ir similarity measure which is tolerant for morphological variation. Journal of Natural Langage Processing, Vol. 10, No. 1, pp. 63-80, January 2003. (In Japanese)

Yoshiyuki Takeda and Kyoji Umemura. Document frequency analysis which realizes keyword extraction. Mathematical Linguistics, Vol. 23, No. 2, pp. 65-90, September 2001. (In Japanese)