Publications*

2013

A Flexible Approach to Modeling Unpredictable Events in MDPs.
Stefan J. Witwicki, Francisco S. Melo, Jesús Capitán Fernández, and Matthijs T.J. Spaan. In Proceedings of the 23rd International Conference on Automated Planning and Scheduling, (ICAPS-2013). Rome, Italy. June 2013. To appear.

2012

Query-POMDP: POMDP-based Communication in Multiagent Systems.
Francisco S. Melo, Matthijs Spaan, and Stefan Witwicki. In Multiagent Systems, Lecture Notes in Artificial Intelligence 7541, Springer, pp. 189-204, 2012.

Decentralized Multiagent Planning for Balance Control in Smart-Grids.
Francisco S. Melo, Alberto Sardinha, Stefan Witwicki, Laura Ramirez-Elizondo, and Matthijs Spaan. In Proceedings of the International Workshop on Information Technology for Energy Applications (IT4ENERGY-2012). Lisbon, Portugal. September 2012.

Influence-Based Abstraction for Multiagent Systems.
Frans A. Oliehoek, Stefan J. Witwicki, and Leslie P. Kaelbling. In Proceedings of the Twenty-Sixth AAAI Conference (AAAI-2012), pages 1422-1428. Toronto, Canada. July 2012.

Heuristic Search of Multiagent Influence Space.
Stefan J. Witwicki, Frans A. Oliehoek, and Leslie P. Kaelbling. In Proceedings of the Eleventh International Conference on Autonomous Agents and Multiagent Systems (AAMAS-2012), pages 973-980. Valencia, Spain. June 2012.

Planning and Evaluating Multiagent Influences Under Reward Uncertainty (Extended Abstract).
Stefan Witwicki, Inn-Tung Chen, Edmund Durfee, and Satinder Singh. In Proceedings of the Eleventh International Conference on Autonomous Agents and Multiagent Systems (AAMAS-2012), pages 1277-1278. Valencia, Spain. June 2012.

Exploiting Sparse Interactions for Optimizing Communication in Dec-MDPs.
Francisco Melo, Matthijs Spaan, and Stefan Witwicki. In Proceedings of the Workshop on Multiagent Sequential Decision Making Under Uncertainty (MSDM-2012) at AAMAS, pages 40--47. Valencia, Spain. June 2012.

2011

Heuristic Search of Multiagent Influence Space.
Frans A. Oliehoek, Stefan J. Witwicki, and Leslie P. Kaelbling. In Proceedingst of the European Workshop on Multi-agent Systems (EUMAS-2011). Maastricht, the Netherlands. November 2011. (An updated version of this paper appears in AAMAS-2012, as listed above.)

Towards a Unifying Characterization for Quantifying Weak Coupling in Dec-POMDPs.
Stefan J. Witwicki and Edmund H. Durfee. In Proceedings of the Tenth International Conference on Autonomous Agents and Multiagent Systems (AAMAS-2011), pages 29-36. Taipei, Taiwan. May 2011. Nominated for Best Student Paper Award.

Abstracting Influences for Efficient Multiagent Coordination Under Uncertainty.
Stefan J. Witwicki. Ph.D. Thesis, University of Michigan, Ann Arbor, Michigan, USA. January 2011.

2010

Influence-Based Policy Abstraction for Weakly-Coupled Dec-POMDPs.
Stefan J. Witwicki and Edmund H. Durfee. In Proceedings of the 20th International Conference on Automated Planning and Scheduling (ICAPS-2010), pages 185-192. Toronto, Canada. May 2010.

From Policies to Influences: A Framework For Nonlocal Abstraction In Transition-Dependent Dec-POMDP Agents (Extended Abstract).
Stefan J. Witwicki and Edmund H. Durfee. In Proceedings of the Ninth International Conference on Autonomous Agents and Multiagent Systems (AAMAS-2010). Toronto, Ontario. May 2010.

Influence-based Policy Abstraction for Weakly-Coupled Dec-POMDPs.
Stefan J. Witwicki and Edmund H. Durfee. In Proceedings of the 5th Worshop on Multi-agent Sequential Decision-Making in Uncertain Domains (MSDM-2010) at AAMAS, pages 7-14. Toronto, Ontario. May 2010. (An updated version of this paper appears in ICAPS-2010, as listed above.)

2009

Flexible Approximation of Structured Interactions in Decentralized Markov Decision Processes (Extended Abstract).
Stefan J. Witwicki and Edmund H. Durfee. In Proceedings of the Eighth International Conference on Autonomous Agents and Multiagent Systems (AAMAS-2009), pages 1251-1252. Budapest, Hungary. May 2009. (A longer version of this paper appears in MSDM-2009, as listed below.)

Commitment-Based Service Coordination.
Stefan J. Witwicki and Edmund H. Durfee. International Journal of Agent-Oriented Software Engineering (IJAOSE), 3(1), pages 59-87. 2009.

Commitment Abstraction for Efficient Planning and Coordination in Stochastic Multiagent Systems (Extended Abstract).
Stefan J. Witwicki. In Proceedings of the AAMAS-2009 Doctoral Mentoring Symposium, pages 19-20. Budapest, Hungary. May 2009.

Flexible Approximation of Structured Interactions in Decentralized Markov Decision Processes.
Stefan J. Witwicki and Edmund H. Durfee. In Proceedings of the 4th Worshop on Multi-agent Sequential Decision-Making in Uncertain Domains (MSDM-2009) at AAMAS, pages 65-72. Budapest, Hungary. May 2009.

2008 and earlier

Commitment-Based Service Coordination.
Stefan J. Witwicki and Edmund H. Durfee. In Proceedings of the International Workshop on Service Oriented Computing: Agents, Semantics, and Engineering (SOCASE-2008), pages 134-148, 2008. A journal version of this paper was published in 2009 in IJAOSE, as listed above.

Commitment-Driven Distributed Joint Policy Search.
Stefan J. Witwicki and Edmund H. Durfee. In Proceedings of the Sixth International Conference on Autonomous Agents and Multiagent Systems (AAMAS-2007), pages 480-487. Honolulu, Hawaii. May 2007.

Cooperating Unmanned Vehicles.
Robert W. Chalmers, Dave H. Scheidt, Todd M. Neighoff, Stefan J. Witwicki, and Robert J. Bamberger. In Proceedings of the American Institute of Aeronautics and Astronautics (AIAA) 1st Intelligent Systems Technical Conference. AIAA-2004-6252. Chicago, IL. September 2004.



*Notes:
1. I have included papers that appear in workshops with unpublished proceedings.
2. I present the above materials to ensure timely dissemination of scholarly and technical work. Copyright and all rights in the papers are retained by authors and by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. These works may not be reposted without the explicit permission of the copyright holder.