Publications

Book Chapter, Editorial Supervisor of a Book, Editor of Proceedings, etc.

  1. Masao Ohira, Kiwako Koyama, Akinori Ihara, Shinsuke Matsumoto, Yasutaka Kamei, Ken-ichi Matsumoto, A Time-Lag Analysis for Improving Communication among OSS Developers, In Kumiyo Nakakoji, Yohei Murakami, Eric McCready (Eds.), New Frontiers in Artificial Intelligence, Lecture Notes in Artificial Intelligence, LNAI6284, pp.135-146, 2010. (selected and revised paper from the Proceedings of The 3rd International Workshop on Knowledge Collaboration in Software Development (KCSD2009))
  2. Masao Ohira and Yunwen Ye, 3rd International Workshop on Supporting Knowledge Collaboration in Software Development (KCSD2009), In Kumiyo Nakakoji,Yohei Murakami,Eric McCready (Eds.), New Frontiers in Artificial Intelligence, Lecture Notes in Artificial Intelligence, LNAI6284, pp.89-90, 2010.
  3. Masao Ohira and Yunwen Ye (Eds.), Proceedings of the 3rd International Workshop on Knowledge Collaboration in Software Development (KCSD2009), The Japanese Society for Artificial Intelligence, 2009.
  4. Kumiyo Nakakoji, Masao Ohira, Akio Takashima, and Yasuhiro Yamamoto, A Computational Tool for Lifelong Learning: Experiencing Breakdowns and Understanding Situations, In Ulrich Hoppe, Amy Soller and Hiroaki Ogata (Eds.), The Role of Technology in CSCL: Studies in Technology Enhanced Collaborative Learning (Computer-Supported Collaborative Learning Series), Chapter 4, pp.47-62, Springer, 2007.
  5. Yunwen Ye and Masao Ohira (Eds.), Proceedings of the 2nd International Workshop on Supporting Knowledge Collaboration in Software Development (KCSD2006), National Institute of Informatics, 2006.
  6. Albert Endres, Dieter Rombach (authors), Noriko Yoshiki (Translator), Hajimu Iida, Naoki Ohsugi, Masao Ohira, Shinji Kusumoto, Makoto Sakai, Taira, Shinkai, Tomoko Matsumura, Akito Monden (Editorial Supervisor), A Handbook of Software and Systems Engineering: Empirical Observations, Laws and Theories [Japanese Version], Computer Age inc., Tokyo, 2005.

Invited article

  1. Masao Ohira, Yunwen Ye, Kumiyo Nakakoji, Yasuhiro Yamamoto, Knowledge Collaboration in Software Development, Journal of the Japanese Society for Artificial Intelligence, Vol.26, No.1, pp.66-78, January 2011. (in Japanese)

Journal papers

  1. Anakorn Jongyindee, Masao Ohira, Akinori Ihara, and Ken-ichi Matsumoto, Good Or Bad Committers? – A Case Study of Committer’s Activities on the Eclipse’s Bug Fixing Process,” IEICE Transactions on Information and Systems, 2012. (to appear)
  2. Passakorn Phannachitta, Akinori Ihara, Pijak Jirapiwong, Masao Ohira, and Ken-ichi Matsumoto, An Algorithm for Gradual Patch Acceptance Detection in Open Source Software Repository Mining Date of Evaluation, IEICE Transactions on Information and Systems, 2012. (to appear)
  3. Akinori Ihara, Yasutaka Kamei, Masao Ohira, Ken-ichi Matsumoto, Naoyasu Ubayashi, A Candidate Committer Prediction based on Developer Activities in Open Source Software Projects, Journal of Institute of Electronics, Information and Communication Engineers, Vol.J95-D, No.2, pp.237-249, February, 2012. (in Japanese)
  4. Akinori Ihara, Masao Ohira, Ken-ichi Matsumoto, The Current State and Issues of the Bug Fixing Process in OSS Development: An Analysis Toward Improving Time to Fix Bugs, Journal of The Infosocionomics Society, Vol.6, No.2, pp.1-12, November, 2011. (in Japanese)
  5. Yasutaka Kamei, Masao Ohira, Akinori Ihara, Kiwako Koyama, Shinsuke Matsumoto, Ken-ichi Matsumoto, Naoyasu Ubayashi, Studying the Impact of Time Difference on Global Communications among OSS Developers, Journal of The Infosocionomics Society, Vol.8, No.2, pp.13-30, November, 2011. (in Japanese)
  6. Masao Ohira, Masaki Kimura, Ken-ichi Matsumoto, Marble: a system for supporting online collaborative music creation among casual users, Journal of Human Interface Society, Vol.12, No.3, pp.21-31, August, 2010. (in Japanese)
  7. Mikio Kiura, Masao Ohira, Hidetake Uwano, Ken-ichi Matsumoto, Webjig: A Visualization System for Analyzing User Behaviors in Dynamic Web Sites, Journal of Information Processing Society of Japan, Vol.51, No.1, pp.204-215, January, 2010. [Recommended by IPSJ SIGNG] (in Japanese)
  8. Hirofumi Taki, Shuji Morisaki, Masao Ohira, Ken-ichi Matsumoto, An Analysis toward Constructing Answer Trust Metrics for Q&A Community, Journal of The Infosocionomics Society, Vol.4, No.1, pp.49-58, June, 2009. (in Japanese)
  9. Shinsuke Matsumoto, Yasutaka Kamei, Masao Ohira, Ken-ichi Matsumoto, Understanding Open Collaboration in OSS Communities, Journal of The Infosocionomics Society, Vol.3, No.2, pp.29-42, March, 2009. (in Japanese)
  10. Hidetake Uwano, Kyoko Ishida, Yuko Matsuda, Shota Fukushima, Noboru Nakamichi, Masao Ohira, Ken-ichi Matsumoto, Yasunori Okada, Evaluation of Software Usability Using Electroencephalogram – Comparison of Frequency Component between Different Software Versions, Journal of Human Interface Society, Vol.10, No.2, pp.233-242, May, 2008. (in Japanese)
  11. Akinori Tsuji, Masao Ohira, Shuji Morisaki, Ken-ichi Matsumoto, Supporting Software Requirements Elicitation as Collaboration among Heterogeneous Stakeholders, Journal of Institute of Electronics, Information and Communication Engineers, Special Issue on Intercultural Collaboration, Vol.J90-D, No.12, pp.3151-3160, December, 2007. (in Japanese)
  12. Masao Ohira, Reishi Yokomori, Makoto Sakai, Satoshi Iwamura, Eiji Ono, Taira Shinkai, Tomoyuki Yokogawa, Designing a System for Real-Time Software Development Management, Journal of Institute of Electronics, Information and Communication Engineers, Special Issue on System Development, Vol. J88-D-I, No.2, pp. 228-239, February, 2005. (in Japanese)
  13. Masao Ohira, Yasuhiro Yamamoto, Kei Kurakawa, Kumiyo Nakakoji, L-EVIDII: a Learning Environment for Supporting Project-based Collaborative Learning, Journal of Japanese Society for Information and Systems in Education, Vol.18, No.3-4 (Autumn-Winter), pp.328-339, December, 2001. (in Japanese)
  14. Kumiyo Nakakoji, Masao Ohira, Yasuhiro Yamamoto, Computational Support for Collective Creativity, Knowledge-Based Systems Journal, Elsevier Science, Vol.13, No.7-8, pp.451-458, December, 2000.
  15. Masao Ohira, Yasuhiro Yamamoto, Kumiyo Nakakoji, EVIDII: A System that Supports Mutual Understanding through Visualizing Differences of Impressions, Journal of Information Processing Society of Japan, Special Issue on Knowledge and Information Sharing, Vol.41, No.10, pp.2814-2826, October, 2000. (in Japanese)

International conference papers (refereed)

  1. Masao Ohira, Ahmed E. Hassan, Naoya Osawa, Ken-ichi Matsumoto, The impact of bug management patterns on bug fixing: a case study of  Eclipse projects, Proceedings of 28th IEEE International Conference on Software Maintenance (ICSM2012), September, 2012. (to appear)
  2. Papon Yongpisanpop, Passakorn Phannachitta, Masao Ohira and Ken-ichi Matsumoto, An adaptive search framework for supporting cooperative work in organizations, Proceedings of 10th Asia Pacific Conference on Computer Human Interaction (APCHI2012), August, 2012. (to appear)
  3. Anakorn Jongyindee, Pattara Leelaprute, Masao Ohira, and Ken-ichi Matsumoto, Lessons Learned from Collaborative Research in Software Engineering: A Student’s Perspective, In Proceedings of International Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing (SNPD 2012), pp. 494-497, August, 2012.
  4. Passakorn Phannachitta, Pijak Jirapiwong, Akinori Ihara, Masao Ohira, and Ken-ichi Matsumoto, An Analysis of Gradual Patch Application – A Better Explanation of Patch Acceptance, In Proceedings The Joint Conference of the 21th International Workshop on Software Measurement and the 6th International Conference on Software Process and Product Measurement (IWSM/MENSURA2011), pp.106-115, November, 2011.
  5. Anakorn Jongyindee, Masao Ohira, Akinori Ihara, and Ken-ichi Matsumoto, Good Or Bad Committers? A Case Study of Committers’ Cautiousness and the Consequences on the Bug Fixing Process in the Eclipse Project, In Proceedings The Joint Conference of the 21th International Workshop on Software Measurement and the 6th International Conference on Software Process and Product Measurement (IWSM/MENSURA2011), pp.116-125, November, 2011. [Best Student Paper Award]
  6. Anakorn Jongyindee, Masao Ohira, Akinori Ihara, and Ken-ichi Matsumoto, A Case Study of the Consequences from Committers’ Activities on the Bug Fixing Process in the Eclipse Project, In Proceedings The International Workshop on Empirical Software Engineering in Practice (IWESEP2011), pp.9-14, November, 2011.
  7. Passakorn Phannachitta, Pijak Jirapiwong, Akinori Ihara, Masao Ohira, and Ken-ichi Matsumoto, Understanding OSS Openness Through Relationship between Patch Acceptance and Evolution Pattern, In Proceedings The International Workshop on Empirical Software Engineering in Practice (IWESEP2011), pp.37-42, November, 2011.
  8. Soichiro Tani, Akinori Ihara, Masao Ohira, Hidetake Uwano, and Ken-ichi Matsumoto, A System for Information Integration between Development Support Systems, In Proceedings The International Workshop on Empirical Software Engineering in Practice (IWESEP2011), November, 2011.
  9. Chakkrit Tantithamthavorn, Papon Yongpisanpop, Masao Ohira, Arnon Rungsawang, and Ken-ichi Matsumoto, A Tool for Collaborative Guitar Chords Creation Based on the Concept of the Distributed Version Control, In Proceedings The International Workshop on Empirical Software Engineering in Practice (IWESEP2011), pp.43-44, November, 2011.
  10. Papon Yongpisanpop, Masao Ohira, and Kenichi Matsumoto, Adaptive Search Engine for Organization Using Crowdsourcing Techniques, In Proceedings of The 2011 International Computer Science and Engineering Conference (ICSEC2011) , September 2011. (to appear)
  11. Chakkrit Tantithamthavorn, Papon Yongpisanpop, Masao Ohira, Arnon Rungsawang, and Kenichi Matsumoto, Chordbook: A Portable Guitar Chord Song Book Using Crowdsourcing Techniques, In Proceedings of The 2011 International Computer Science and Engineering Conference (ICSEC2011), September 2011. (to appear)
  12. Masao Ohira, Hitoshi Masaki, and Ken-ichi Matsumoto, Cicro: An Interactive Visual Interface for Crowd Communication Online, In Proceedings of the 14th International Conference on Human-Computer Interaction (HCII2011), Vol.6778, pp.251-260, July 2011.
  13. Yuji Takai, Masao Ohira, and Ken-ichi Matsumoto, Effects of A Synchronized Scoring Interface on Musical Quality, In Proceedings of the 14th International Conference on Human-Computer Interaction (HCII2011), Vol.6778, pp.363-372, July 2011.
  14. Papon Yongpisanpop, Masao Ohira, and Ken-ichi Matsumoto, Community Search: A Collaborative Searching Web Application with A User Ranking System, In Proceedings of the 14th International Conference on Human-Computer Interaction (HCII2011), Vol.6778, pp.378-386, July 2011.
  15. Hitoshi Masaki, Masao Ohira, and Ken-ichi Matsumoto, A Quantitative Evaluation on the Software Use Experience with Electroencephalogram, In Proceedings of the 14th International Conference on Human-Computer Interaction (HCII2011), Vol.6770, pp.469-477, July 2011.
  16. Shoji Fujita, Masao Ohira, Akinori Ihara, and Ken-ichi Matsumoto, An Analysis of Committers Toward Improving the Patch Review Process in OSS Development, the 21st IEEE International Symposium on Software Reliability Engineering (ISSRE2010), pp.369-374, November 2010.
  17. Emad Shihab, Akinori Ihara, Yasutaka Kamei, Walid M. Ibrahim, Masao Ohira, Bram Adams, Ahmed E. Hassan, and Ken-ichi Matsumoto, Predicting Re-Opened Bugs: A Case Study on the Eclipse Project, the 17th Working Conference on Reverse Engineering (WCRE2010), pp.249-258, October 2010.
  18. Masao Ohira,Kiwako Koyama,Akinori Ihara,Shinsuke Matsumoto,Yasutaka Kamei,Ken-ichi Matsumoto, A Time-Lag Analysis for Improving Communication among OSS Developers, In Kumiyo Nakakoji,Yohei Murakami,Eric McCready (Eds.), New Frontiers in Artificial Intelligence, Lecture Notes in Artificial Intelligence, LNAI6284, pp.135-146, 2010. (selected and revised paper from the Proceedings of The 3rd International Workshop on Knowledge Collaboration in Software Development (KCSD2009))
  19. Masao Ohira, Kiwako Koyama, Akinori Ihara, Shinsuke Matsumoto, Yasutaka Kamei, and Ken-ichi Matsumoto, A Time-Lag Analysis Toward Improving the Efficiency of Communications among OSS Developers, Proceedings of The 3rd International Workshop on Knowledge Collaboration in Software Development (KCSD2009), Tokyo, Japan, pp.49-62, November 2009.
  20. Akinori Ihara, Masao Ohira, and Ken-ichi Matsumoto, Differences of Time between Modification and Re-Modification: An Analysis of A Bug Tracking System, Proceedings of The 3rd International Workshop on Knowledge Collaboration in Software Development (KCSD2009), Tokyo, Japan, pp.17-22, November 2009.
  21. Mizuki Yamamoto, Masao Ohira, Yasutaka Kamei, Shinsuke Matsumoto, and Ken-ichi Matsumoto, Temporal Changes of the Openness of An OSS Community: A Case Study of the Apache Http Server Community, Proceedings of The Fifth International Conference on Collaboration Technologies 2009 (CollabTech 2009), Sydney, Australia, pp.64-65, August 2009.
  22. Akinori Ihara, Masao Ohira, and Ken-ichi Matsumoto, An Analysis Method for Improving A Bug Modification Process in Open Source Development, Proceedings of 10th international workshop on principles of software evolution (IWPSE’09), Amsterdam,The Netherlands, pp.135-143, August 2009.
  23. Masaki Kimura, Hidetake Uwano, Masao Ohira, and Ken-ichi Matsumoto, Toward Constructing An Electroencephalogram Measurement Method for Usability Evaluation, Proceedings of 13th International Conference on Human-Computer Interaction(HCI International 2009), San Diego, CA, pp.95-104, July 2009.
  24. Yuko Matsuda, Hidetake Uwano, Masao Ohira, and Ken-ichi Matsumoto, An Analysis of Eye Movements during Browsing Multiple Search Results Pages, Proceedings of 13th International Conference on Human-Computer Interaction(HCI International 2009), San Diego, CA, pp.121-130, July 2009.
  25. Mikio Kiura, Masao Ohira, and Ken-ichi Matsumoto, Webjig: An Automated User Data Collection System for Website Usability Evaluation, Proceedings of 13th International Conference on Human-Computer Interaction(HCI International 2009), San Diego, CA, pp.277-286. July 2009.
  26. Yasutaka Kamei, Shinsuke Matsumoto, Hirotaka Maeshima, Yoji Onishi, Masao Ohira, and Ken-ichi Matsumoto, Analysis of Coordination between Developers and Users in the Apache Community, In The Fourth International Conference on Open Source Systems (OSS2008), Milan, Italy, pp.81-92, 2008.
  27. Kimiharu Ohkura, Yoji Onishi, Shinji Kawaguchi, Masao Ohira, Himu Iida, and Ken-ichi Matsumoto, A Method for Measuring OSS Projects’ Activity Based on Cluster Analysis of Email Threads, In The Fourth International Conference on Open Source Systems (OSS2008), Milan, Italy, 2008.
  28. Shinsuke Matsumoto, Yasutaka Kamei, Masao Ohira, and Ken-ichi Matsumoto, A Comparison Study on the Coordination between Developers and Users in FOSS Communities, In Socio-Technical Congruence (STC 2008) , No.CD-ROM-NO.8, Leipzig, Germany, pp.1-9, May 2008.
  29. Masao Ohira, Kumiyo Nakakoji, and Ken-ichi Matsumoto, D-SNS: A Knowledge Exchange Mechanism Using Social Network Density among Mega-Community Users, In Proceedings of Supporting the Social Side of Large Scale Software Development (CSCW2006 Workshop), Banff, Alberta, Canada, pp.39-42, November 2006.
  30. Takeshi Kakimoto, Yasutaka Kamei, Masao Ohira, and Ken-ichi Matsumoto, Social Network Analysis on Communications for Knowledge Collaboration in OSS Communities, In the 2nd International Workshop on Supporting Knowledge Collaboration in Software Development (KCSD2006), Tokyo, Japan, pp.35-41, September 2006.
  31. Susumu Kuriyama, Masao Ohira, Hiroshi Igaki, and Ken-ichi Matsumoto, A Wearable Interface for Visualizing Coauthor Networks Toward Building A Sustainable Research Community, The working conference on Advanced visual interfaces (AVI2006), Venezia, Italy, May 2006.
  32. Masao Ohira, Tetsuya Ohoka, Takeshi Kakimoto, Naoki Ohsugi, and Ken-ichi Matsumoto, Supporting Knowledge Collaboration Using Social Networks in A Large-Scale Online Community of Software Development Projects, APSEC2005 Workshop on Supporting Knowledge Collaboration in Software Development, Taipei, Taiwan, pp.835-840, December, 2005.
  33. Masao Ohira, Naoki Ohsugi, Tetsuya Ohoka, Ken-ichi Matsumoto, Accelerating cross-project knowledge collaboration using collaborative filtering and social networks, International Workshop on Mining Software Repositories (MSR2005), St. Louis, MO, pp.111-115, May, 2005.
  34. Masao Ohira and Ken-ichi Matsumoto, Analysis on Diversity and Similarity among Software Development Projects Using Empirical Project Monitor, In Proceedings of International Workshop on Computer-Supported Knowledge Collaboration, pp.8-9, July 2004. (Shanghai, China)
  35. Masao Ohira, Reishi Yokomori, Makoto Sakai, Ken-ichi Matsumoto, Katsuro Inoue, Michael Barker, Koji Torii, Empirical Project Monitor: A System for Managing Software Development Projects in Real Time, 2004 International Symposium on Empirical Software Engineering (ISESE2004), Vol.2, pp.37-38, Redondo Beach, CA, 2004.
  36. Masao Ohira, Reishi Yokomori, Makoto Sakai, Ken-ichi Matsumoto, Katsuro Inoue, Koji Torii, Empirical Project Monitor: A Tool for Mining Multiple Project Data, International Workshop on Mining Software Repositories (MSR2004), Edinburgh, Scotland, UK, pp.42-46, May, 2004.
  37. Masao Ohira, EVIDII: An Environment to Help Externalizing Implicit Ideas through Visualizing Individual Associations, Proceedings of IFIP TC.13 International Conference on Human-Computer Interaction(INTERACT’01), Japan, pp. 648-651, July, 2001.
  38. Kumiyo Nakakoji, Masao Ohira, A. Takashima, Yasuhiro Yamamoto, A Computational Tool for Lifelong Learning Through Experiencing Breakdowns and Understanding the Situations, The International Workshop on New Technologies for Collaborative Learning, Hyogo, Japan, pp.99-107, November, 2000.
  39. Kumiyo Nakakoji, Yasuhiro Yamamoto, Masao Ohira, A Framework that Supports Collective Creativity in Design using Visual Images, Creativity and Cognition’99, Loughborough, UK., ACM Press, New York, NY., pp.166-173, October, 1999.
  40. Masao Ohira, Yasuhiro Yamamoto, Kumiyo Nakakoji, An Environment for Constructing Shared Understanding through Visualizing Differences of Impressions, Proceedings of the International Symposium on Future Software Technology (ISFST-99), Nanjing, China, Software Engineers Associates, pp. 113-118, October, 1999.
  41. Masao Ohira, Yasuhiro Yamamoto, Shingo Takada, Kumiyo Nakakoji, EVIDII: An Environment that Supports Understanding Differences Among People, International Conference on Cognitive Science 99 (ICCS 99), pp. 466-471. July, 1999.

Domestic conference papers (a lot but unfortunately most of them are in Japanese.)

The information is available from Japanese page.

Workshop/Invited Talks

  1. Masao Ohira, Supporting the Cross-Project Knowledge Collaboration in Large-Scale OSS Communities, A Symposium on ITC based Industry Cluster Generation, Kyoto, March 2007.
  2. Masao Ohira, Ken-ichi Matsumoto, Analysis on Diversity and Similarity among Software Development Projects Using Empirical Project Monitor, International Workshop on Computer-Supported Knowledge Collaboration, Fudan University, Shanghai, China, July, 2004.
  3. Masao Ohira , Inter-Community Metrics (ICM): Analysis on Diversity and Similarity among OSS Projects Using EPM, 2nd DynC Project Meeting, Future University-Hakodate, Hakodate, September 13, 2004.
  4. Masao Ohira, Empirical Project Monitor and Results from 100 OSS Development Projects, International Workshop on Community-Driven Evolution of Knowledge Artifacts, University of California, Irvine, December, 2003.
  5. Masao Ohira, EVIDII – A shared communicative environment for collaborative design, International Symposium on Social Creativity, Breckenridge, Colorado, June, 2002.
  6. Masao Ohira, Toward Computational Support for Collaborative Learning in Group Meetings,International Symposium on Social Creativity and Meta-Design, Aspen, Colorado, May, 2001
Award winning papers and presentations
  1. Anakorn Jongyindee, Masao Ohira, Akinori Ihara, Ken-ichi Matsumoto, Good or Bad Committers? A Case Study of Committers’ Cautiousness and the Consequences on the Bug Fixing Process in the Eclipse Project, Proceedings of The Joint Conference of the 21th International Workshop on Software Measurement and the 6th International Conference on Software Process and Product Measurement (IWSM/MENSURA2011), pp.116-125, November, 2011. (Best Student Paper Award)
  2. Hirofumi Taki, Masao Ohira, Ken-ichi Matsumoto, A Visual Interface for Crowd Communication Online, 75th IPSJ SIGGN Meeting , No.16, pp.1-8, March 2010. (IPSJ Yamashita SIG Research Award: Hirofumi Taki)
  3. Shoji Fujita, Akinori Ihara, Masao Ohira, Ken-ichi Matsumoto, A Categorization of Committers to Support the Patch review Process in OSS Development, 2010 Annual Conference of IPSJ Kansai Division, Vol.2010, September 2010. (Best Student Award: Shoji Fujita)
  4. Akinori Ihara, Mizuki Yamamoto, Masao Ohira, Ken-ichi Matsumoto, An Awareness Support System for Improving Maintenance Activities in OSS Development, 2010 IPSJ Multimedia, Distributed, Collaboration and Mobile Symposium (DICOMO2010), pp.1620-1629, July 2010. (Best Presentation Award: Akinori Ihara)
  5. Naoya Osawa, Masaki Kimura, Papon Yongpisanpop, Yuji Takai, Masao Ohira, Ken-ichi Matsumoto, A System for Community-based Real time Collaborative Music Creation, 2010 IPSJ Multimedia, Distributed, Collaboration and Mobile Symposium (DICOMO2010), pp.1101-1107, July 2010. (Young Researcher Award: Naoya Osawa)
  6. Hirofumi Taki, Masao Ohira, Ken-ichi Matsumoto, A Visual Interface for Crowd Communication Online, 75th IPSJ SIGGN Meeting , No.16, pp.1-8, March 2010. (Best Presentation Award: Hirofumi Taki)
  7. Akinori Ihara, Masao Ohira, Ken-ichi Matsumoto, An Analysis Method for Reducing the Time to Fix Bugs in a Bug Tracking System , 2009 IPSJ Multimedia, Distributed, Collaboration and Mobile Symposium (DICOMO2010), pp.1221-1227, July 2009. (Young Researcher Award: Akinori Ihara)
  8. Mikio Kiura, Masao Ohira, Hidetake Uwano, Ken-ichi Matsumoto, Webjig: A System that Visualizes Users’ Activities on Dynamic Web Sites, 2008 IPSJ Symposium on Groupware and Network Services, Vol.2008, No.10, pp.97-102, November 2008. (Best Paper Award)
  9. Akinori Ihara, Yasutaka Kamei, Masao Ohira, Shinsuke Matsumoto, Ken-ichi Matsumoto, An Analysis of Bug Information Sharing in OSS Development, 2010 Annual Conference of IPSJ Kansai Division, Vol.2008, pp.69-72, October 2008. (Best Student Award: Akinori Ihara)
  10. Akinori Ihara, Masao Ohira, Shinsuke Matsumoto, Yasutaka Kamei, Ken-ichi Matsumoto, Social Network Analysis on an OSS Community with Multiple Sub-Communities, 2008 IPSJ Multimedia, Distributed, Collaboration and Mobile Symposium (DICOMO2010), pp.297-303, July 2008. (Best Presentation Award: Akinori Ihara)
  11. Akinori Ihara, Masao Ohira, Shinsuke Matsumoto, Yasutaka Kamei, Ken-ichi Matsumoto, Social Network Analysis on an OSS Community with Multiple Sub-Communities, 2008 IPSJ Multimedia, Distributed, Collaboration and Mobile Symposium (DICOMO2010), pp.297-303, July 2008. (Best Paper)
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