Current Position

Assistant Professor
Business Information Systems Laboratory
Department of Multimedia Engineering
Graduate School of Information Science and Technology
Osaka University

Research Topic

Machine Learning and Optimization Algorithms for Sustainable System Management

Application
  • Optimization of Virtual Machine Scheduling
  • Anomaly Detection in Large-scale and Complex Network
  • Operation Optimization of Data Centers with Distributed Energy
  • Supply Chain Management based on catastrophic risks

Contact

E-mail: samejima_at_ist.osaka-u.ac.jp
(Please change "_at_ " to @)

Education

  • Bachelor of Engineering from Osaka University in March 2005
  • Master of Information Science from Osaka University in March 2007
  • Ph. D. of Information Science from Osaka University in September 2008

Work Experience

  • Systems Development Laboratory, Hitachi, Ltd. (April 2007 - May 2009)
    engaged in researches on knowledge sharing for project managements.
  • Dept. of Multimedia Engineering, Graduate School of Information Science and Technologies, Osaka University (June 2009-)
  • Visiting Scholar, International Institute for Applied Systems Analysis, Austria (July - October, 2010)
  • Visiting Researcher, University of Freiburg, Germany (April 2014 - March 2015)

Activity

Professional Affiliations

  • IEEE
  • The Institute of Electrical Engineers of Japan (IEEJ)
  • Information Processing Society of Japan (IPSJ)
  • The society of project management

Professional Services

  • The 2017 9th International Conference on Graphic and Image Processing (ICGIP 2017), Publicity Chair (Oct. 2017)
  • The 2017 IEEE International Conference on Systems, Man, and Cybernetics (SMC2017),
    Special Session Chair on "Industrial Control Systems Safety, Security and Reliability" (Oct. 2017)
  • The 2016 IEEE International Conference on Systems, Man, and Cybernetics (SMC2016),
    Special Session Chair on "Advanced Methods and Applications for Increasing Control Systems Reliability, Safety and Security" (Oct. 2016)
  • The 1st IIAI International Conference on Enterprise Architecture and Information Systems (EAIS 2016), Conference Chair (Jul. 2016)
  • The 2015 IEEE International Conference on Systems, Man, and Cybernetics (SMC2015),
    Special Session Chair on "Risk Management of Information and Control Systems" (Oct. 2015)
  • International Workshop on Systems Safety and Security (IWSSS2015), Committee Chair (Jun. 2015).
  • International Workshop on Systems Safety and Security (IWSSS2014), Workshop Chair (Oct. 2014)
  • The 1st Asian Conference on Information Systems (ACIS 2012), Vice Program Co-Chairs(Dec. 2012)
  • The 4th Japan-China Joint Symposium on Information Systems (JCIS 2011), Publicity Co-Chairs(Apr. 2011)
  • 8th IEEE International Conference on Industrial Informatics (INDIN 2010), Local Arrangement Co-Chairs(Jul. 2010)
  • The 3rd Japan-China Joint Symposium on Information Systems (JCIS 2010), Publicity Co-Chairs(Apr. 2010)

Program Committee member

  • 18th IEEE/ACIS Int. Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing (SNPD 2017)
  • International Workshop on Systems Safety and Security (IWSSS2016)
  • 8ht International Conference on Knowledge Management and Information Sharing (KMIS2016)
  • The Eleventh International Conference on Knowledge, Information and Creativity Support Systems (KICSS2016)
  • The 5th Asian Conference on Information Systems (ACIS 2016)
  • 17th IEEE/ACIS Int. Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing (SNPD 2016)
  • The Tenth International Conference on Knowledge, Information and Creativity Support Systems (KICSS2015)
  • The 4th Asian Conference on Information Systems (ACIS 2015)
  • 7ht International Conference on Knowledge Management and Information Sharing (KMIS2015)
  • International Workshop on Systems Safety and Security (IWSSS2015)
  • 16th IEEE/ACIS Int. Conference on Software Engineering, Artificial Intelligence, Networking and Parallel/Distributed Computing (SNPD 2015)
  • The 3rd Asian Conference on Information Systems (ACIS 2014)
  • 6ht International Conference on Knowledge Engineering and Ontology Development (KEOD2014)
  • International Workshop on Systems Safety and Security (IWSSS2014)
  • 5ht International Conference on Knowledge Engineering and Ontology Development (KEOD2013)
  • International Workshop on Systems Safety and Security for Automotive, Passengers and Goods Protection (IWSSS2013)
  • The First Asian Conference on Information Systems (ACIS 2012)
  • 2012 IEEE International Conference on Fuzzy Systems (FUZZ-IEEE 2012)
  • Japan-Cambodia Joint Symposium on Information Systems and Communication Technology (JCAICT 2011)
  • The 4th Japan-China Joint Symposium on Information Systems (JCIS 2011)
  • 8th IEEE International Conference on Industrial Informatics (INDIN 2010)
  • The 3rd Japan-China Joint Symposium on Information Systems (JCIS 2010)

Academic committee work

  • Secretary, Program Committee in The Institute of Electrical Engineers of Japan (IEEJ), 2013–2015.
  • Secretary, Editorial Committee in The Institute of Electrical Engineers of Japan (IEEJ), 2013–2015.
  • Member, Technical Committee on System Safety and Security in IEEE Systems, Man and Cybernetics Society, 2013–2014.
  • Secretary, Technical Committee on Information Systems in The Institute of Electrical Engineers of Japan (IEEJ), 2011–2013.
  • Assistant Secretary, Technical Committee on Information Systems in The Institute of Electrical Engineers of Japan (IEEJ), 2010–2011.

Award

  • 2010年 The 3rd Japan-China Joint Symposium on Information Systems (JCIS 2010), Best Paper Award
  1. H.T. Minh, M. Samejima, N. Komoda, "Power and Performance estimation for Fine-grained Server Power Capping via Controlling Heterogeneous Applications", ACM Trans. on Management Information Systems (accepted)
  2. M. Otsuki, M. Akiyoshi, M. Samejima, "Identification Method of Improvements in User Operations on Project Manager Skill-Up Simulator", IEEE Access (accepted)
  3. M. Mori, R. Kobayashi, M. Samejima, N. Komoda, "Risk-Cost Optimization for Procurement Planning in Multi-tier Supply Chain by Pareto Local Search with Relaxed Acceptance Criterion", European Journal of Operational Research (accepted)
  4. M. Samejima, D. Hisakane, N. Komoda, "Automatic annotation method on learners' opinions in case method discussion", Interactive Technology and Smart Education, Vol.12, No.2, pp.90-99 (2015.6)
  5. M. Samejima, R. Sasaki, "Chance-constrained Programming Method of IT Risk Countermeasures for Social Consensus Making", IEEE Trans. on Systems, Man, and Cybernetics: Systems, Vol.45, No.5, pp.725-733 (2015.5)
  6. M. Mori, R. Kobayashi, M. Samejima, N. Komoda, "Cost-benefit Analysis of Decentralized Ordering on Multi-tier Supply Chain by Risk Simulator", Studies in Informatics and Control, Vol.23, No.3, pp.229-239 (2014.9)
  7. M. Samejima, H. Ohno, M. Akiyoshi, N. Komoda, M. Yoshino, "An Anomaly Detection Method on Web-based System by Trend Analysis with Autoregressive Model," IEEJ Transactions on Electronics, Information and Systems, Vol.134, No.6, pp.814-820 (2014.6)
  8. Y. Sakumichi, M. Akiyoshi, M. Samejima, H. Oka, "Detection of FAQs Matching Inquiry E-mails by Automatic Generation of Characteristic Word Groups from Past Inquiry E-mails", Electronics and Communications in Japan, Vol.97, No.3, pp.38-44 (2014.3)
  9. M. Samejima, Y. Imanara, "An awareness system of risk control action by constrained clustering on project reports", IADIS Int. Journal on Computer Science and Information Systems, Vol.8, No.1, pp.130-141 (2014.2)
  10. Y. Tsuda, M. Samejima, M. Akiyoshi, N. Komoda, M. Yoshino, "An Anomaly Detection Method for Individual Services on a Web-Based System by Selection of Dummy Variables in Multiple Regression", Electronics and Communications in Japan, Vol.97, Vol.2, pp.9-16 (2014.2)
  11. M. Samejima, Y. Saito, M. Akiyoshi, H. Oka, "A Predictive Search Method for FAQ-based Question Answering System", Int. Journal of Artificial Intelligence, pp.103-114 (2013.10)
  12. M. Samejima, M. Akiyoshi, "An Interpolation Method of Uncertain Landmarks for Improving Accuracy of Simulation on Qualitative and Quantitative Hybrid Model", IEEJ Trans. on Electrical and Electronic Engineering, Vol.8, No.1, pp.56-62 (2013.1)
  13. M. Samejima, Y. Morita, M. Akiyoshi, "High-speed generation of goal-oriented scenarios using bidirectional combination of effect propagation on a qualitative and quantitative hybrid model", Electronics and Communications in Japan, Vol.95, No.12, pp.10-20 (2012.12)
  14. M. Samejima, K. Negoro, K. Mitsukuni, M. Akiyoshi, "A method of finding business risk factors using the characteristics of probability distributions of effect ratios on qualitative and quantitative hybrid simulation", Electronics and Communications in Japan, Vol.95, No.3, pp.55-65 (2012.3)
  15. R. Sasaki, S. Sugimoto, H. Yajima, H. Masuda, H. Yoshiura, M. Samejima, "Proposal for a Social-MRC: Social Consensus Formation Support System Concerning IT Risk Countermeasures", Int. Journal of Information Processing and Management, Vol.2, No.2, pp.48-58 (2011.4)
  16. M. Samejima, M. Akiyoshi, K. Mitsukuni, N. Komoda, "Business scenario evaluation using Monte Carlo simulation on qualitative and quantitative hybrid model", Electrical Engineering in Japan, Vol.170, No.3, pp.9-18 (2010.2)
  17. M. Samejima, M. Gen, T. Nakazaki, M. Akiyoshi, N. Komoda, "An extraction method of time-series numerical data from press releases by using co-occurrence conditions of numbers and time stamps related to target business keywords", Electronics and Communications in Japan, Vol.93, No.3, pp.61-69 (2010.3)
  1. M. Samejima，N. Satoh, “A Risk Screening System by Network Diagram Recognition for Information Security Audit”, in E. Pricop, G. Stamatescu (Eds.), “Recent Advances in System Safety and Security”, Studies in Systems, Decision and Control, Springer-Verlag, Vol. 62, pp.201-210 (2016.5)
  2. M. Samejima, “Topic Analysis of Case Reports in Tourism towards Collaborative Tourism Planning Support”, in T. Matsuo, K. Hashimoto, H. Iwamoto (Eds.), "Tourism Informatics", Series of Intelligent Systems Reference Library, Springer-Verlag, Vol.90, pp.1-14 (2015.9)
  3. K. Hamada, M. Akiyoshi, M. Samejima, "Reference Operation Generation Method on Project Manager Skill-up Simulator", in A. Fred, et al. (Eds.), "Knowledge Discovery, Knowledge Engineering and Knowledge Management", Series of Communications in Computer and Information Science, Springer-Verlag, Vol.415, pp.297-307 (2013.12)
  4. M. Samejima, M. Akiyoshi, H. Oka, "A Help Desk Support System based on Relationship between Inquiries and Responses", in T. Matsuo and R. C.-Palacios (Eds.), "Electronic Business and Marketing: New Trends on Its Process and Applications", Series of Studies in Computational Intelligence, Springer-Verlag, Vol.484, pp.43-66 (2013.4)
  1. M. Samejima, Y. Matsushita, "Fast General Norm Approximation via Iteratively Reweighted Least Squares", in Proc. of ACCV 2016 International Workshops on e-Heritage, pp.207-221 (2016)
  2. M. Samejima, "Simulation-based Process of Consensus Building on Procurement Plan under Disruption Risk in Multi-tier Supply Chain", 2016 5th IIAI International Congress on Advanced Applied Informatics, pp. 904-907 (2016.7.10-14, Kumamoto)
  3. M. Samejima, M. Akiyoshi, "A Knowledge Extraction System from Manager’s Operation Sequences in System Development Project", 2016 5th IIAI International Congress on Advanced Applied Informatics, pp. 1084-1087 (2016.7.10-14, Kumamoto)
  4. H.T. Minh, M. Samejima, "Modeling Green-aware Job Scheduling Problem in Decentralized Data Centers", 2016 5th IIAI International Congress on Advanced Applied Informatics, pp. 1093-1096 (2016.7.10-14, Kumamoto)
  5. H.T. Minh, M. Samejima, "An Evaluation of Job Scheduling based on Distributed Energy Generation in Decentralized Data Centers", in Proc. of 2015 IEEE Int. Conf. on Systems, Man & Cybernetics (SMC 2015), pp.1172-1177 (2015.10.9-12, Hong Kong)
  6. M. Samejima, "A Fault Localization Framework for Dynamically Provisioned Virtual Machines", in Proc. of 2015 IEEE Int. Conf. on Systems, Man & Cybernetics (SMC 2015), pp.1184-1188 (2015.10.9-12, Hong Kong)
  7. Y. Fukuzawa, M. Samejima, H. Ujita, "Survey on Risk Management Based on Information Security Psychology", in Proc. of 17th Int. Conf. on Human-Computer Interaction (HCI International 2015) , pp.396-408 (2015.8.2-7, Los Angeles, CA, USA)
  8. M. Samejima, D. Hisakane, N. Komoda, "Automatic Annotation on Opinions in Case Method Discussion by Support Vector Machine", in Proc. of 8th IADIS Int. Conf. on Information Systems 2015 (IS 2015), pp.129-136 (2015.3.14-16, Madeira, Portugal)
  9. M. Mori, R. Kobayashi, M. Samejima, N. Komoda, "Risk-Cost Optimization Method of Procurement Planning in Multi-tier Supply Chain", in Proc. of the Third Asian Conf. on Information Systems (ACIS 2014), pp.48-55 (2014.12.1-3, Nha Trang, Viet Nam)
  10. H.T. Minh, M. Samejima, N. Komoda, "A Restraint Usage Estimation Method of Server Resource for Peak Shaving in Data Center by Piecewise Linear Regression", in Proc. of the Third Asian Conf. on Information Systems (ACIS 2014), pp.41-47 (2014.12.1-3, Nha Trang, Viet Nam)
  11. R. Kobayashi, K. Sato, M. Samejima, N. Komoda, "A Prediction-based Scheduling Method for Dynamic Placement of Virtual Machines in Data Center", in Proc. of 13th Int. Conf. on Applications of Computer Engineering (ACE’14), pp.19-24 (2014.10.30-11.1, Lisbon, Portugal)
  12. D. Hisakane, M. Otsuki, M. Samejima, N. Komoda, "A Tutoring Rule Selection Method for Case-based e-Learning by Multi-Class Support Vector Machine", in Proc. of 6th Int. Conf. on Knowledge Management & Information Sharing (KMIS 2014), pp.126-132 (2014.10.21-24, Rome, Italy)
  13. D. Hisakane, M. Samejima, "A Visualization System of Discussion Structure in Case Method Learning", in Proc. of 6th Int. Conf. on Knowledge Management & Information Sharing (KMIS 2014), pp.119-125 (2014.10.21-24, Rome, Italy)
  14. M. Mori, R. Kobayashi, M. Samejima, N. Komoda, "Analysis of Risk Mitigation by Decentralized Ordering in Multi-tier Supply Chain", in Proc. of 2014 IEEE Int. Symposium on Industrial Electronics (ISIE 2014), pp.1093-1098 (2014.6.1-4, Istanbul, Turkey)
  15. M. Samejima, H.T. Minh, N. Komoda, "Flexible Peak Shaving in Data Center by Suppression of Application Resource Usage", in Proc. of 16th Int. Conf. on Enterprise Information Systems (ICEIS2014), pp.355-360 (2014.4.27-30, Lisbon, Portugal)
  16. K. Sato, M. Samejima, R. Sasaki, "Chance-constrained Programming Method by Constraints Aggregation for Social Consensus Making on IT Risk Countermeasure", in Proc. of 2013 IEEE Int. Conf. on Systems, Man & Cybernetics (SMC 2013), pp.4789-4793 (2013.10.13-16, Manchester, UK)
  17. M. Otsuki, M. Samejima, "An Intelligent Tutoring System for Case-Based e-Learning on Project Management", in Proc. of 2013 IEEE Int. Conf. on Systems, Man & Cybernetics (SMC 2013), pp.3471-3476 (2013.10.13-16, Manchester, UK)
  18. M. Samejima, K. Hamada, "A Change Detection Method of Arguing Points by Factor Analysis for Case Method Support", in Proc. of 2013 IEEE Int. Conf. on Systems, Man & Cybernetics (SMC 2013), pp.2849-2853 (2013.10.13-16, Manchester, UK)
  19. M. Samejima, "Case-Based Support System for Collaborative Tourism Planning", in Proc. of 4th Int. Conf. on E-Service and Knowledge Management (ESKM 2013), pp.21-25 (2013.8.31-9.4, Matsue, Japan)
  20. R. Kobayashi, M. Mori, M. Samejima, N. Komoda, "An interactive evaluation method of decentralized procurement plan by multi-objective genetic algorithm", in Proc. of 10th Int. Conf. on e-Business (ICE-B 2013), pp.361-368 (2013.7.29-31, Reykjavik, Iceland)
  21. K. Sato, M. Samejima, N. Komoda, "Dynamic optimization of virtual machine placement by resource usage prediction", in Proc. of 11th IEEE Int. Conf. on Industrial Informatics (INDIN 2013), pp.86-91 (2013.7.29-31, Bochum, Germany)
  22. M. Mori, R. Kobayashi, M. Samejima, N. Komoda, "An evaluation method of reduced procurement risks by decentralized ordering in supply chain", in Proc. of 11th IEEE Int. Conf. on Industrial Informatics (INDIN 2013), pp.80-85 (2013.7.29-31, Bochum, Germany)
  23. T. Hirashima, M. Samejima, "A Hybrid Risk Evaluation Method of Information System Development Project by Quantification Method II and Co-occurrence Words Matching", in Proc. of IADIS Int. Conf. Information Systems Post-implementation and Change Management 2013 (in 2013 MCCSIS), pp.47-51 (2013.7.22-24, Prague, Czech Republic)
  24. M. Samejima, Y. Imanara, "An extraction method of risk control action from project reports by constrained clustering", in Proc. of IADIS Int. Conf. Information Systems Post-implementation and Change Management 2013 (in 2013 MCCSIS), pp.11-18 (2013.7.22-24, Prague, Czech Republic)
  25. H. Oono, M. Samejima, M. Akiyoshi, N. Komoda, "An anomaly detection method on Web-based system by certification of structural change on autoregressive model", in Proc. of 1st Asian Conf. on Information Systems (ACIS 2012), pp.86-90 (2012.12.6-8, Siem Reap, Cambodia)
  26. M. Samejima, R. Sasaki, "Approximation Method for Chance-Constrained Programming of Social Consensus Formation Concerning IT Risk Countermeasure", in Proc. of 2012 IEEE Int. Conf. on Systems, Man & Cybernetics (SMC 2012), pp.2751-2755 (2012.10.14-17, Seoul, Korea)
  27. Y. Tsuda, N.T. Nguyen, M. Samejima, M. Akiyoshi, N. Komoda, M. Yoshino, "An Anomaly Detection Method for Individual Service on Web-based System by Selection of Dummy Variables in Multiple Regression", in Proc. of 2012 IEEE Int. Conf. on Systems, Man & Cybernetics (SMC 2012), pp.1873-1877 (2012.10.14-17, Seoul, Korea)
  28. M. Samejima, H. Yajima, "IT Risk Management Framework for Business Continuity by Change Analysis of Information System", in Proc. of 2012 IEEE Int. Conf. on Systems, Man & Cybernetics (SMC 2012), pp.1670-1674 (2012.10.14-17, Seoul, Korea)
  29. R. Miyaji, D. Nakajima, M. Samejima, M. Akiyoshi, H. Morihisa, "An Identification Method of Lacking Information by Clue Phrases in Plan Document for Project Risk Management", in Proc. of 2012 IEEE Int. Conf. on Systems, Man & Cybernetics (SMC 2012), pp.1240-1244 (2012.10.14-17, Seoul, Korea)
  30. Y. Imanara, D. Nakajima, M. Samejima, M. Akiyoshi, H. Morihisa, "An Identification Method of Risks in Project Plan Document by Automatic Acquisition of Risk Expression", in Proc. of 2012 IEEE Int. Conf. on Systems, Man & Cybernetics (SMC 2012), pp.1235-1239 (2012.10.14-17, Seoul, Korea)
  31. M. Akiyoshi, M. Samejima, N. Komoda, "A Project Manager Skill-up Simulator Towards Problem Solving-based learning", in Proc. of 4th Int. Conf. on Knowledge Management & Information Sharing (KMIS 2012), pp.190-195 (2012.10.4-7, Barcelona, Spain)
  32. M. Otsuki, M. Akiyoshi, M. Samejima, "An Improvement Method of User Operations using Decision Tree on Project Manager Skill-up Simulator", in Proc. of 4th Int. Conf. on Knowledge Management & Information Sharing (KMIS 2012), pp.158-163 (2012.10.4-7, Barcelona, Spain)
  33. K. Hamada, M. Akiyoshi, M. Samejima, "A Generation Method of Reference Operation using Reinforcement Learning on Project Manager Skill-up Simulator", in Proc. of 4th Int. Conf. on Knowledge Management & Information Sharing (KMIS 2012), pp.15-20 (2012.10.4-7, Barcelona, Spain)
  34. K. Sato, M. Samejima, M. Akiyoshi, N. Komoda, "A Scheduling Method of Air Conditioner Operation using Workers Daily Action Plan towards Energy Saving and Comfort at Office", in Proc. of 2012 Int. Conf. on Emerging Technology & Factory Automation (ETFA 2012), pp.(2012.9.17-21, Krakow, Poland)
  35. Y. Tsuda, M. Akiyoshi, M. Samejima, H. Oka, "A classification method of inquiry E-mails for describing FAQ with automatic setting mechanism of Judgment threshold values", in Proc. of 2012 Int. Conf. on Enterprise Information Systems (ICEIS 2012), Vol.3, pp.199-205 (2012.6.28-7.1, Wrolaw, Poland)
  36. K. Hamada, M. Akiyoshi, M. Samejima, H. Oiso, "A classification method of open-ended questionnaires using category-based dictionary from sampled documents", in Proc. of 2012 Int. Conf. on Enterprise Information Systems (ICEIS 2012), Vol.3, pp.193-198 (2012.6.28-7.1, Wrolaw, Poland)
  37. M. Samejima, Y. Saito, M. Akiyoshi, H. Oka, "A Predictive Search Method of FAQ Corresponding to a User’s Incomplete Inquiry by Statistical Model of Important Words Co-occurrence", in Proc. of 5th Int. Symposium on Distributed Computing and Artificial Intelligence (DCAI 2012), pp.9-16 (2012.3.28-30, Salamanca, Spain)
  38. D. Nakajima, Y. Mitsui, M. Samejima, M. Akiyoshi, "An Information Extraction Method from Different Structural Web Sites by Word Distances Between a User Instantiated Label and Similar Entity", in Proc. of 11th IEEE ICDM Workshop on Data Mining for Service (DMS 2011), pp.1177-1182 (2011.12.11, Vancouver, Canada)
  39. M. Samejima, "Risk Management Technologies in Information Systems", in Proc. of 2nd Int. Symposium on Applied Informatics, pp.13-14 (2011.8.9, Kaminoyama, Yamagata, Japan) (Invited Speech)
  40. M. Samejima, Y. Morita, M. Akiyoshi, "A high-speed generation of goal-oriented scenarios using combination of bidirectional propagation on qualitative and quantitative hybrid model", in Proc. of the 9th IEEE Int. Conf. on Industrial Informatics (INDIN 2011), pp.57-62 (2011.7.26-29, Lisbon, Portugal)
  41. Y. Sakumichi, M. Akiyoshi, M. Samejima, H. Oka, "A Detection Method of FAQ Matching Inquiry E-mails by Automatic Generation of Characteristic Word Groups on Past Inquiry E-mails", in Proc. of the 9th IEEE Int. Conf. on Industrial Informatics (INDIN 2011), pp.53-56 (2011.7.26-29, Lisbon, Portugal)
  42. K. Iwai, M. Akiyoshi, M. Samejima, H. Morihisa, "A situation-dependent scenario generation framework for project management skill-up simulator", in Proc. of 6th Int. Conf. on Software and Data Technologies (ICSOFT2011), pp.408-412 (2011.7.18-21, Seville, Spain)
  43. Y. Imanara, K. Itakura, M. Samejima, M. Akiyoshi, "An identification method of related group threads for a recent bug thread by peak characteristics of similarities", in Proc. of 6th Int. Conf. on Software and Data Technologies (ICSOFT2011), pp.179-184 (2011.7.18-21, Seville, Spain)
  44. M. Akiyoshi, J.J.C.K. Li, M. Samejima, N. Komoda, "Concept-based clustering for open-sourced software(OSS) development forum threads", in Proc. of the 7th Int. Conf. on Web Information Systems and Technologies (WEBIST 2011), pp.690-695 (2011.5.6-9, Noordwijkerhout, The Netherlands)
  45. Y. Imanara, K. Itakura, M. Samejima, M. Akiyoshi, "A detection system of dependent relationships among bug report threads", in Proc. of the 4th Japan-China Joint Symposium on Information Systems (JCIS2011), pp.65-68 (2011.4.14-17, Nanchang, China)
  46. D. Nakajima, K. Kawaratani, M. Samejima, M. Akiyoshi, "High-speed Solver of Combinatorial Problem of Risk-reducing Plans by Approximately Bounding on Branch and Bound", in Proc. of the 1st Japan-Cambodia Joint Symposium on Information Systems and Communication Technology (JCAICT2011), pp.39-43 (2011.1.6-8, Phnom Penh, Cambodia)
  47. K. Itakura, M. Samejima, M. Akiyoshi, R. Sasaki, "A Consensus Support System for Deciding a Combination of Risk-reducing Plans under Uncertain Parameters", in Proc. of 2010 IEEE Int. Conf. on Systems, Man, and Cybernetics (SMC 2010), pp.2083-2087 (2010.10.10-13, Istanbul, Turky)
  48. M. Samejima, M. Akiyoshi, N. Komoda, R. Sasaki, "Social Consensus Making Support System by Qualitative and Quantitative Hybrid Simulation", in Proc. of 2010 IEEE Int. Conf. on Systems, Man, and Cybernetics (SMC 2010), pp.896-901 (2010.10.10-13, Istanbul, Turky)
  49. K. Kawaratani, K. Itakura, M. Samejima, M. Akiyoshi, "High-Speed Decision Method of Combination of Risk-reducing Plans using Branch and Bound", in Proc. of the 8th IEEE Int. Conf. on Industrial Informatics (INDIN 2010), pp.379-383 (2010.7.13-16, Osaka, Japan)
  50. D. Nakajima, M. Samejima, M. Akiyoshi, N. Komoda, "A Prioritization Method of Adjusting Parameters for Making Consensus on Combination of Risk-Reducing Plans by Mutual Effect Analysis", in Proc. of the 8th IEEE Int. Conf. on Industrial Informatics (INDIN 2010), pp.326-330 (2010.7.13-16, Osaka, Japan)
  51. M. Samejima, M. Akiyoshi, N. Komoda, "An Accuracy Improvement Method of Simulation on Qualitative and Quantitative Hybrid Model with Uncertain Landmarks", in Proc. of the 3rd Japan-China Joint Symposium on Information Systems, pp.11-16 (2010.4.22-24, Beijing, China)
  52. M. Samejima, G. Shida, M. Akiyoshi, N. Komoda, "A Search Method of Inputs to Target Outputs on Qualitative and Quantitative Hybrid Simulation using Neighbor Selection by Sensitivity Analysis", in Proc. of the 7th Int. Symposium on Intelligent Systems and Informatics (SISY 2009), pp.209-214 (2009.9.25-26, Subotica, Serbia)
  53. M. Samejima, G. Shida, M. Akiyoshi, N. Komoda, "User Interface for Sensitivity Analysis on Qualitative and Quantitative Hybrid Simulation", in Proc. of the 2009 Int. Conf. on Multimedia, Information Technology and its Applications (MITA2009), pp.124-127 (2009.8.19-21, Sakai, Japan)
  54. Y. Uchida, M. Samejima, Y. Hoshi, K. Hatsuda, K. Tatebe, "An Approach of Knowledge Sharing via Empirical Knowledge in Project Management", in Proc. of Int. Conf. on Project Management (ProMAC 2008), pp.1448-1453 (2008.9.15-18, Anchorage, AK, USA)
  55. M. Akiyoshi, M. Samejima, "Hybrid Simulation with Qualitative and Quantitative Integrated Model under Uncertain Business Environment", in Abstracts of IFIP/IIASA/GAMM Workshop on Coping with Uncertainty (CwU), p.1 (2007.12.10-12, Laxenburg, Austria)
  56. M. Samejima, M. Akiyoshi, K. Mitsukuni, N. Komoda, "Business scenario design support by qualitative-quantitative hybrid simulation", in Proc. of The IEEE Int. Conf. on e-Technology, e-Commerce, and e-Services (EEE'07) and the IEEE Int. Conf. on Electronic Commerce (CEC’07), pp.401-408 (2007.7.23-25, Tokyo, Japan)
  57. M. Samejima, K. Negoro, M. Akiyoshi, N. Komoda, K. Mitsukuni, "Hybrid Simulation on Qualitative and Quantitative Integrated Model using Monte Carlo Method", 2007 Summer Computer Simulation Conf. (SCSC 2007), in CD-Rom (2007.7.15-18, San Diego, CA, USA)
  58. M. Samejima, Y. Shimizu, M. Akiyoshi, N. Komoda, "SWOT Analysis Support Tool for Verification of Business strategy", in Proc. of IEEE Int. Conf. on Computational Cybernetics.(IEEE-ICCC2006), pp.167-170 (2006.8.20-22, Tallin, Estonia)
  59. M. Samejima, S. Tamura, Y. Ikkai, N. Komoda, H. Goshima, T. Mori, "A scheduling method in multi-item production adjusting to urgent orders based on job modifiability", in Proc. of 10th IEEE Int. Conf. on Emerging Technologies and Factory Automation (ETFA'2005), Vol.I, pp.1107-1112 (2005.9.19-22, Catania, Italy)

Lecture