Brad Clement

My JPL homepage: http://www-aig.jpl.nasa.gov/public/home/bclement Resume: clement-resume.pdf Curriculum Vitae: clement-cv.pdf Background I grew up in Atlanta, got my bachelor's in Computer Engineering at Georgia Tech while working at IBM as a coop, and then worked as a software research engineer for Matsushita Electric Works (National/Panasonic) for two years in Osaka, Japan before joining the CSE Ph.D. program at The University of Michigan.   I defended my Ph.D. thesis 12/17/01 and am currently working for the Artificial Intelligence Group at the Jet Propulsion Laboratory.

Research

I'm interested in artificial intelligence in general but specifically in multiagent coordination, situated planning and execution, distributed systems, and AI in games.

With guidance from my advisor, Ed Durfee, I looked at ways to coordinate a group of agents that have separately developed hierarchical plan libraries.  --Visit our team's page on Multilevel Coordination Mechanisms for Real-Time Autonomous Agents.

Check out some examples of plan coordination in a NEO (noncombative evacuation operation) domain. These examples are visualized using a discrete event simulator developed as part of a testbed for the DARPA CoABS project.

Before this, my research was focused on improving task management in a multiagent system called TAIPE for the  SSA (Ship System Automation) project.  Here's the report for my oral qualification exam:

• Task Management in TAIPE: Scheduling High-Level Tasks among Cooperative Agents (postscript)

Publications:

Some papers made available here are subject to copyright terms. You may browse or print a personal copy, however commercial use without the permission of the publisher is prohibited.

Journal Article

• Bradley J. Clement, Edmund H. Durfee, Anthony C. Barrett. Abstract Reasoning for Planning and Coordination. Journal of Artificial Intelligence Research, Volume 28, 453--515, 2007. (PDF, HTML)

Highly Refereed Conferences

• Steven R. Schaffer, Bradley J. Clement, Steve A. Chien. Probabilistic Reasoning for Plan Robustness. Proceedings of the Nineteenth International Joint Conference on Artificial Intelligence, 2005.
• Bradley J. Clement, Mark D. Johnston. The Deep Space Network Scheduling Problem. Proceedings of the Seventeenth Innovative Applications of Artificial Intelligence Conference, 2005.
• Bradley J. Clement, Anthony C. Barrett. Continual Coordination through Shared Activities. To appear in the Proceedings of the Second International Conference on Autonomous Agents and Multi-Agent Systems, 2003. (PDF)
• Bradley J. Clement, Anthony C. Barrett, Gregg R. Rabideau, Edmund H. Durfee. Using Abstraction in Planning and Scheduling. Proceedings of the Sixth European Conference on Planning, 2001. (postscript--© Springer-Verlag, errata, powerpoint presentation)
• Bradley J. Clement, Anthony C. Barrett, Gregg R. Rabideau, Edmund H. Durfee. Using Abstraction to Coordinate Multiple Robotic Spacecraft. Proceedings of the IEEE/RSJ International Conference on Intelligent Robots and Systems, 2001. (PDF, powerpoint presentation)
• Bradley J. Clement, Edmund H. Durfee. Theory for Coordinating Concurrent Hierarchical Planning Agents Using Summary Information. Proceedings of the Sixteenth National Conference on Artificial Intelligence, 495-502, 1999. (postscript, extended report, powerpoint presentation)
• Bradley J. Clement, Edmund H. Durfee. Top-Down Search for Coordinating the Hierarchical Plans of Multiple Agents. Proceedings of the Third International Conference on Autonomous Agents, 252-259, 1999. (postscript, powerpoint presentation ACM Copyright Notice )
• Bradley J. Clement, Edmund H. Durfee. Scheduling High-Level Tasks among Cooperative Agents. Proceedings of the Third International Conference on Multi-Agent Systems, pp. 96-103, 1998.  (postscript for non-commercial use; postscript of a more lengthy version; powerpoint presentation)

• Bradley J. Clement, Steven R. Schaffer. Exploiting C-TÆMS Models for Policy Search. Proceedings of the ICAPS 2008 Workshop on Multiagent Planning, 2008. (PDF, powerpoint presentation)
CL#08-2535
• Bradley J. Clement, Mark D. Johnston, Steven R. Schafer, Danny Tran. Experience with a Constraint and Preference Language for DSN Communications Scheduling, Proceedings of the International Symposium on Artificial Intelligence and Robotic for Space (iSAIRAS), 2008. (PDF, powerpoint presentation)
CL#07-4487
• Bradley J. Clement, Mark D. Johnston. Design of a Deep Space Scheduling System. Proceedings of the 5th International Workshop on Planning and Scheduling for Space, October, 2006. (PDF, powerpoint presentation)
• Bradley J. Clement, Anthony C. Barrett. Space Applications for Distributed Constraint Reasoning. IJCAI Workshop on Distributed Constraint Reasoning.. Edinburgh, Scotland, 2005.
CL#05-1409
• Johnston, M. D. and B. J. Clement (2005). Automating Deep Space Network Scheduling and Conflict Resolution. ISAIRAS 2005, Munich, Germany. (PDF)
CL#05-1739
• Bradley J. Clement, Anthony C. Barrett, Steven R. Schaffer. Argumentation for Coordinating Shared Activities. Proceedings of the 4th International NASA Workshop on Planning and Scheduling for Space, 2004. (PDF, powerpoint presentation)
• Bradley J. Clement, Steven R. Schaffer. Distributed Network Scheduling. Proceedings of the 4th International NASA Workshop on Planning and Scheduling for Space, 2004. (PDF, poster)
• Steven R. Schaffer, Steve A. Chien, Bradley J. Clement. Probabilistic Reasoning for Robust Plan Execution. Proceedings of the 4th International NASA Workshop on Planning and Scheduling for Space, 2004.
• Bradley J. Clement, Anthony C. Barrett. Continual Coordination of Spacecraft through Shared Activities. Proceedings of the 3rd International NASA Workshop on Planning and Scheduling for Space, 2002. (PDF, poster slides)
• Hyuckchul Jung, Milind Tambe, Anthony Barrett, Bradley Clement. Enabling Efficient Conflict Resolution in Multiple Spacecraft Missions via DCSP. Proceedings of the 3rd International NASA Workshop on Planning and Scheduling for Space, 2002. (download)
• Bradley J. Clement, Anthony C. Barrett. Coordination Challenges for Autonomous Spacecraft. AAMAS-02 workshop notes on Toward an Application Science: MAS Problem Spaces and Their Implications to Achieving Globally Coherent Behavior, 2002. (PDF, powerpoint presentation)
• Bradley J. Clement, Anthony C. Barrett. Continual Coordination of Shared Activities.. AAAI-02 workshop notes on Planning with and for Multiagent Systems, 2002. (postscript, powerpoint presentation)
• Jeffrey S. Cox, Bradley C. Clement, Pradeep M. Pappachan, and Edmund H. Durfee. Integrating Multiagent Coordination with Reactive Plan Execution. Proceedings of the ACM Conference on Autonomous Agents (Agents-01), 149-150, 2001. (extended abstract)
• Bradley Clement and Anthony Barrett. Using Abstraction in Multi-Rover Scheduling. Proceedings of The 6th International Symposium on Artificial Intelligence, Robotics and Automation in Space, 2001. (postscript)
• Bradley J. Clement, Edmund H. Durfee. Exploiting Domain Knowledge with a Concurrent Hierarchical Planner. AIPS Workshop on Analysing and Exploiting Domain Knowledge for Efficient Planning, Working Notes, 57-62, 2000. (postscript, powerpoint presentation)
• Bradley J. Clement, Edmund H. Durfee. Performance of Coordinating Concurrent Hierarchical Planning Agents Using Summary Information. Proceedings of the Seventh International Workshop on Agent Theories, Architectures, and Languages, 202-216, 2000. (postscript--© Springer-Verlag, powerpoint presentation)
• Bradley J. Clement, Edmund H. Durfee. Performance of Coordinating Concurrent Hierarchical Planning Agents Using Summary Information. Proceedings of the Fourth International Conference on MultiAgent Systems, 2000. (postscript, poster slides)
• Bradley J. Clement, Edmund H. Durfee. Identifying and Resolving Conflicts among Agents with Hierarchical Plans. AAAI Workshop on Negotiation: Settling Conflicts and Identifying Opportunities, Technical Report WS-99-12, 6-11, 1999. (postscript, powerpoint presentation)

• Doran Chakraborty, Sabyasachi Saha, Sandip Sen, Bradley J. Clement. Negotiating Monitoring Task Allocation for Orbiters. Distributed Computing and Networking, Series: Lecture Notes in Computer Science, Vol. 4308, Springer, 2006. (abstract)
• Bradley J. Clement, Anthony C. Barrett. Coordination Challenges for Autonomous Spacecraft. in Thomas Wagner (Editor), An Application Science for Multi-Agent Systems, Series: Multiagent Systems, Artificial Societies, and Simulated Organizations, Vol. 10, Springer-Verlag, 2004.
• Bradley J. Clement, Edmund H. Durfee. Performance of Coordinating Concurrent Hierarchical Planning Agents Using Summary Information. in Cristiano Castelfranchi, Yves Lesperance (Eds.), Intelligent Agents VII: Agent Theories Architectures and Languages, 213-227, Springer-Verlag Lecture Notes in AI, 2001. (PDF--© Springer-Verlag)

Dissertation

• Bradley J. Clement. Abstract Reasoning for Multiagent Coordination and Planning. University of Michigan, Ann Arbor, 2002.(PDF 1.3MB, postscript 6.4MB, presentation 2.3MB).

Classes

Some classes I've taken at UMich and some of the projects:
 

Course	Project
EECS 591: Distributed Systems	Hierarchical Group Communication for Spatial Multi-Player Games
EECS 545: Machine Learning	Learning Markov Model Representations of Harmonic Progressions in Music
EECS 595: Natural Language Processing	Learning Stochastic Context-Free Grammar Representations of Harmonic Progressions in Music
EECS 592: Advanced AI	An Approach to Real Time Coordination of Distributed Search Applied to Natural Language Processing
EECS 584: Advanced Database Systems	Synthetic Data for Database Testing
EECS 543: Knowledge-Based Systems
EECS 542: Vision Processing	Registration using ICP
EECS 470: Computer Architecture	Logic design of a 32-bit PowerPC microprocessor
PSYCH 808: Cognitive Modeling	Learning Distributed Representations of Abstract Letter Identities

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