About Me

I am a postdoctoral researcher at the Intelligent Agents and Synthetic Characters Group (GAIPS) of INESC-ID and Instituto Superior Técnico, in the Technical University of Lisbon. The focus of my research is on developing principled techniques for coordinating the decisions of interacting intelligent agents (e.g., robots, web service agents, or unmanned vehicles). I am active in the AAMAS (Autonomous Agents and Multiagent Systems) and AAAI research communities, where I have served on a number of related program and review committees and have been co-organizing the annual Workshop on Multiagent Sequential Decision Making Under Uncertainty (MSDM) since 2011.

Prior to beginning my postdoc, I completed my PhD (2011) at the University of Michigan AI Lab, under the supervision of my advisor Ed Durfee. My dissertation, which formalized influence-based policy abstraction for planning in cooperative weakly-coupled multiagent system, yielded a runner-up for the best student paper at AAMAS 2011, a dissertation award nomination, and a number of publications in prestigious conferences and journals. Before my doctoral work, I enjoyed a brief hiatus from academia, conducting applied research at JHU/APL with David Scheidt and Bob Chalmers. And looking back even further, I obtained my bachelor's (2002) and master's (2003) degrees from Cornell University, where I worked with professors Bart Selman, Carla Gomes, and Rich Caruana.

UPDATE: I have moved to EPFL, where I am applying planning and reasoning to teams of miniature mobile robots. More updates coming as soon as I find time. Contact me for further info.

Research Interests

Artificial Intelligence, Planning and Reasoning under Uncertainty, Multiagent Coordination, Sequential Decision Making, Game Thoery, Machine Learning, Robot Control, Smartgrids

Upcoming Events

I am co-organizing the 8th annual Workshop on Multiagent Sequential Decision Making Under Uncertainty (MSDM-2013), to be held in conjunction with AAMAS 2013 in St. Paul, Minnesota, USA, on May 7. Please visit our webpage for further information, and to submit your recent work.

Active Projects

I am presently applying my research to an Intelligent Surveillance System, in collaboration with Roboticists, Computer Vision Experts, and Portugal's eminent video-surveillance company.

See a list of all my past, present, and future projects here.

[MAIS-S]
Recommended Publications

Heuristic Search of Multiagent Influence Space.
Stefan J. Witwicki, Frans A. Oliehoek, and Leslie P. Kaelbling. In Proceedings of the 11 International Conference on Autonomous Agents and Multiagent Systems (AAMAS-2012), pages 973--980. Valencia, Spain. June 2012.

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.

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 Schedubling (ICAPS-2010), pages 185-192. Toronto, Canada. May 2010.

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.

See my full list of publications here.