Overview

Networked Simulation research described here covers topics addressed jointly with the Intelligent Systems Laboratory (ISL) and research done independently in the Computer Architecture Lab (CAL). The CAL focus in Networked Simulation research addresses a fundamental issue in distributed architectures: the tradeoff between computation and communication. Existing Distributed Interactive Simulation (DIS) network protocols maintain coherence by broadcasting simulation state streams from each remote station. In this research, a novel alternative to DIS that replaces the transmitting sources with local sources is being developed, validated, and assessed by analytical and experimental means. The Concurrent Model approach reduces the communication burden to transmission of only synchronization and model-update messages. First, the necessary and sufficient conditions for the correctness of Concurrent Models in a discrete event simulation environment were established by developing Behavioral Congruence and Temporal Congruence criteria. They are being validated through experiment where Bandwidth Reduction Ratios (BRRs) of 100Smart Priority Queue adaptive data structure developed are an output of this research. Finally, our recently-developed transmission aggregation protocol called Packet Alloying presents an innovative approach to Simulation Traffic Optimization.

Sponsors

• U.S. Army Research, Development, and Engineering Command (RDECOM) [Sponsor's Site] [Award Details]
• U.S. Army Simulation Training and Instrumentation Command (STRICOM) [Sponsor's Site] [Award Details]
• Naval Air Warfare Center Training Systems Division (NAWCTSD) [Sponsor's Site] [Award Details]
• Mitsubishi Research Institute [Sponsor's Site] [Award Details]
• Lockheed Martin Information Systems [Sponsor's Site] [Award Details]
• Some sponsors co-listed with UCF Intelligent System Lab (ISL)

People

Faculty

Publications

Journal Articles

1. H. A. Bahr and R. F. DeMara, "Data Bandwidth Reduction for Embedded Simulation using Concurrent Behavior Models," submitted to Simulation on December 31, 2004.
   [abstract] [pdf] [doc] [bibtex]
2. A. J. Gonzalez, A. E. Henninger, M. Georgiopoulos, and R. F. DeMara, “Maintaining Coherence among Entities’ States in a Distributed Multi-Agent System,” submitted to IEEE Transactions on Systems, Man, and Cybernetics on March 22, 2005.
   [abstract] [pdf] [doc] [bibtex]
3. H. Fernlund, A. J. Gonzalez, R. F. DeMara, and M. Georgiopoulos, "Learning Tactical Human Behavior through Observation of a Human Actor," accepted to IEEE Transactions on Systems, Man and Cybernetics on June 3, 2005.
   [abstract] [pdf] [doc] [bibtex]
4. H. A. Bahr and R. F. DeMara, “OTBSAF Scalability on Pentium III/4 and Athlon 64/XP3000 Architectures,” in MSIAC Modeling and Simulation Journal, on February 9, 2005, Vol.6, No. 2, March, 2005, pp. 1 - 4.
   [abstract] [pdf] [doc] [bibtex]
5. J. Vargas, R. F. DeMara, A. J. Gonzalez, M. Georgiopoulos, and H. Marshall, “PDU Bundling and Replication for Reduction of Distributed Simulation Communication Traffic,” Journal of Defense Modeling and Simulation, Vol. 1, No. 3, August, 2004, pp. 171 – 183.
   [abstract] [pdf] [doc] [bibtex]
6. A. J. Gonzalez, W. J. Gerber, R. F. DeMara, and M. Georgiopoulos, “Context-driven Near-term Intention Recognition,” Journal of Defense Modeling and Simulation, Vol. 1, No. 3, August, 2004, pp. 153 – 170.
   [abstract] [pdf] [doc] [bibtex]
7. H. A. Bahr and R. F. DeMara, “Smart Priority Queue Algorithms for Self-optimizing Event Storage,” Simulation Modeling Practice and Theory, Vol. 12, No. 1, April, 2004, pp. 15 – 40.
   [abstract] [pdf] [bibtex]

Conference Proceedings

1. J. C. Leon-Barth, R. F. DeMara, A. J. Gonzalez, and M. Georgiopoulos, “Bandwidth Optimizations for Integrated Tactical and Training Networks,” in Proceedings of the Second Swedish American Workshop on Modeling and Simulation (SAWMAS’04), pp. 24 – 31, Cocoa Beach, Florida, U.S.A., February 1 – 2, 2004.
   [abstract] [pdf] [doc] [bibtex]
2. J. J. Vargas, R. F. DeMara, A. J. Gonzalez, and M. Georgiopoulos, “Bandwidth Analysis of a Simulated Computer Network Executing OTB,” in Proceedings of the Second Swedish American Workshop on Modeling and Simulation (SAWMAS’04), pp. 201 – 208, Cocoa Beach, Florida, U.S.A., February 1 – 2, 2004.
   [abstract] [pdf] [doc] [bibtex]
3. A. E. Henninger, A. J. Gonzalez, M. Georgiopoulos, and R. F. DeMara, “A Connectionist-Symbolic Approach to Modeling Agents: Neural Networks Grouped by Contexts,” in Proceedings of the Third International and Interdisciplinary Conference on Modeling and Using Context (CONTEXT’01), pp. 198 – 209, Dundee Scotland, July 26 – 29, 2001.
   [abstract] [pdf] [doc] [bibtex]
4. A. E. Henninger, A. J. Gonzalez, M. Georgiopoulos, and R. F. DeMara, “Developing and Validating Human Behavioral Models through Learning By Observation,” in Proceedings of the 2001 World Multiconference on Systemics, Cybernetics and Informatics: Concepts and Applications (Part III), Orlando, FL, U.S.A., July 22 – 25, 2001.
   [abstract] [pdf] [bibtex]
5. A. E. Henninger, A. J. Gonzalez, M. Georgiopoulos, and R. F. DeMara, “The Limitations of Static Performance Metrics for Dynamic Tasks Learned Through Observation,” in Proceedings of the Tenth Conference on Computer Generated Forces and Behavioral Representation (CGF-BR’01), pp. 147 – 154, Norfolk, Virginia, U.S.A., May 14 – 17, 2001.
   [abstract] [pdf] [doc] [bibtex]
6. A. E. Henninger, A. J. Gonzalez, M. Georgiopoulos, and R. F. DeMara, “Human Performance Models for Embedded Training: A Novel Approach to Entity State Synchronization,” in Proceedings of the 2001 Advanced Simulation Technology Conference (ASTC-2001) – Symposium on Military, Government, and Aerospace Simulation, Seattle, Washington, U.S.A., April 22 – 26, 2001.
   [abstract] [pdf] [bibtex]
7. A. E. Henninger, A. J. Gonzalez, W. Gerber, M. Georgiopoulos, and R. F. DeMara, “On the Fidelity of SAFs: Can Performance Data Help?” in Proceedings of the 2000 Interservice/Industry Training, Simulation and Education Conference (I/ITSEC-2000), pp. 147 – 154, Orlando, Florida, U.S.A., November 27 – 30, 2000.
   [abstract] [pdf] [bibtex]
8. A. Gallagher, A. J. Gonzalez, and R. F. DeMara, “Modeling Platform Behaviors Under Degraded States Using Context-Based Reasoning,” in Proceedings of the 2000 Interservice/Industry Training, Simulation and Education Conference (I/ITSEC-2000), Orlando, Florida, U.S.A., November 27 – 30, 2000.
   [abstract] [pdf] [doc] [bibtex]
9. A. E. Henninger, A. J. Gonzalez and M. Georgiopoulos, and R. F. DeMara, “Modeling Semi-Automated Forces with Neural Networks: Performance Improvement through a Modular Approach,” in Proceedings of the Ninth Conference on Computer Generated Forces and Behavioral Representation (CGF-BR’00), Orlando, Florida, U.S.A., May 16 – 18, 2000.
   [abstract] [pdf] [bibtex]
10. A. E. Henninger, W. Gerber, R. F. DeMara, M. Georgiopoulos, and A. J. Gonzalez, “Behavior Modeling Framework for Embedded Simulation,” in Proceedings of the 1998 Interservice/Industry Training, Simulation and Education Conference (I/ITSEC’98), Orlando, Florida, U.S.A., November 30 – December 3, 1998.
    [abstract] [pdf] [bibtex]
11. A. J. Gonzalez, R. F. DeMara, and M. Georgiopoulos, “Vehicle Model Generation and Optimization for Embedded Simulation,” in Proceedings of the 1998 Spring Simulation Interoperability Workshop (SIW’98), Orlando, Florida, U.S.A., March 9 – 13, 1998.
    [abstract] [pdf] [bibtex]
12. H. Bahr and R. F. DeMara, “A Concurrent Model Approach to Scaleable Distributed Interactive Simulation,” in Proceedings of the Fifteenth Workshop on the Interoperability of Distributed Interactive Simulation, pp. 215 – 222, Orlando, Florida, U.S.A., September 16 – 20, 1996.
    [abstract] [pdf] [bibtex]