Clark School Home UMD

News Story

Baras gives invited plenary lecture at MED2011

Baras gives invited plenary lecture at MED2011

Professor John Baras (ECE/ISR) gave the invited plenary lecture at the 19th Mediterranean Conference on Control and Automation, (MED2011) in Corfu, Greece, June 22.

The MED conference series, through its technical program, provides a unique opportunity for the academic and industrial communities to address new challenges, share solutions and discuss future research directions. A broad range of topics is covered, following current trends of combining control/systems theory with software/communication technologies. For up-to-date information on MED’11, as well as previous conferences in this series, please visit:

Baras spoke on “Cooperative Networked Systems: Multiple Graphs, Coalitional Games, New Probabilistic Models.” The theme of his talk was the challenges and opportunities for the development of new foundational principles and methodologies for the emerging discipline of networked systems.

In his lecture, Baras considered networked systems from various domains including control, communications, sensing, sociology, economics and biology. He described a general model he has developed for such systems that involves several interacting dynamic multigraphs, and identified three fundamental research challenges underlying these systems. He then introduced the framework of constrained coalitional games and showed that it captures in a fundamental way the basic tradeoff of benefits vs. cost of collaboration, in networked systems.

Baras demonstrated that various simple models of constrained coalitional games can explain network formation and the emergence or not of collaboration. He then proceeded to investigate the interrelationship between the collaboration and communication graphs in networked control systems and the role of the communication topology, among the collaborating agents, in improving the performance of distributed algorithms on graphs, such as convergence speed. He showed that Small World graphs emerge as a good tradeoff between performance and efficiency in consensus problems, where the latter serves as a prototypical coordination problem.

Baras then discussed extensions to expander graphs and presented several results on designing communication topologies for collaborative control, some inspired from biology. Finally, he took a fresh look at the probability and information models that can support the analysis and synthesis of distributed, networked multi-agent systems operating with at least partial asynchrony. He demonstrated that such systems cannot support probability models based on Kolmogorov-type models including cartesian products of the same. The probabilities needed have to be built on a logic model that is based on observables and on the geometry of subspaces of finite dimensional Hilbert spaces rather than the logic of subsets of sets.

Baras showed that with new probability models and the associated information models, several difficult problems in distributed inference and control of networked systems become convex optimization problems.

Related Articles:
John Baras gives invited lecture at workshop on control of CPS systems
John Baras gives distinguished lectures in China
John Baras named Fellow of Society for Industrial and Applied Mathematics
Ph.D. student Anup Menon is finalist for IEEE CDC best paper award
Baras, Somasundaram, Jain, and Tabatabaee issued U.S. Patent 8,325,746
Baras Recognized with Two Greatest Economic Impact Awards
Alumna Mingyan Liu promoted to full professor; wins best paper award
Baras delivers distinguished lecture at the University of Michigan
Baras Gives Keynote at GE Symposium
Baras is PI for $1M NIST cooperative agreement

June 22, 2011

Prev   Next

Current Headlines

Lithium-ion battery research profiled in DOE newsletter

Ephremides receives NSF grant to bridge wireless network theories

UMD Researchers Bridge Gap between Microelectronics, Biological Systems

Ephremides Wins IEEE MILCOM Lifetime Acheivement Award

Jonathan Simon and UMB's Elliot Hong win Research and Innovation Seed Grant

2014 Dean's Student Research Awards Announced

Anyone have recipes for blue marlin?

Munday, Hu and Collaborators’ Research on Inside Cover of Advanced Energy Materials

News Resources

Return to Newsroom
Search News
Archived News

Events Resources

Events Calendar

Additional Resources

UM Newsdesk
Faculty Experts