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Main Deliverables
(not including presentations)

U.S. Dept. of Energy,
ASA/EIA Fellowship Program
Accelerating NEMS Convergence Using Theoretical and Numerical Methods, Summer 2001
  1. S. A. Gabriel, J.A. Faria, S. Kietnithiamorn, 2001. "Accelerating NEMS Convergence Using Theoretical & Numerical Methods," ASA/EIA Research Fellow Program Final Report, University of Maryland Account # 01431647, September 6.
    [Project report, available by request]
National Science Foundation (DMS, Award #0106880) Computational Methods for Equilibrium Problems with Micro-Level Data, 09/01/2001-08/31/2005
  1. R. Egging, S. A. Gabriel. "Examining Market Power in the European Natural Gas Market", October 2004, Energy Policy, in press.
  2. S. A. Gabriel, J. Zhuang, S. Kiet. 2005. "A Large-Scale Complementarity Model of the North American Natural Gas Market", Energy Economics, 27, 639-665.
  3. S. A. Gabriel, J.-F. Zhuang, S. Kiet. 2004 "A Nash-Cournot Model for the North American Natural Gas Market," IAEE Conference Proceedings, Zurich, Switzerland, September.
  4. S. A. Gabriel, S. Kiet, J. Zhuang. "A Competitive Equilibrium Model for the Natural Gas Market Based on a Mixed Complementarity Formulation", Operations Research, in press, zip file of gams code and sample data
District of Columbia Water and Sewer Authority

Optimization of Distribution of Malodorous Products, 01/01/2003-12/31/2003, 10/01/2003-09/30/2004, 01/01/2005-09/30/2005,

  (separate contracts)
  1. S. A. Gabriel, R. García-Bertrand, P. Sahakij, A. Conejo, 2006. "A Practical Approach in Approximating Bilinear Functions in Mathematical Programming Problems by Using Schur's Decomposition and SOS Type 2 Variables," Journal of the Operational Research Society, 57, 995-1004. [1 application in wastewater treatment]
  2. S.A. Gabriel, P. Sahakij, M. Ramirez, C. Peot, 2007. "A Multiobjective Optimization Model for Processing and Distributing Biosolids to Reuse Fields," Journal of the Operational Research Society, 58, 850-864.
  3. P. Sahakij, S.A. Gabriel, M. Ramirez, C. Peot, "Multi-objective Optimization Models for Distributing Biosolids to Reuse Fields: A Case Study for the Blue Plains Wastewater Treatment Plant," December 2007, in review.
District of Columbia Water and Sewer Authority

Statistical Modeling of Biosolids Odor Levels, 10/01/2003-09/30/2004, 10/01/2004-09/30/2005,

  (separate contracts)
  1. S. A. Gabriel, S.Vilalai, S.C. Arispe, H. Kim, L.L. McConnell, A. Torrents, C. Peot, M. Ramirez. 2005 " Prediction of Dimethyl Disulfide Levels from Biosolids Using Statistical Modeling," J. Environ. Sci. Health, Part A 40(11), 2009-2025.
  2. S. A. Gabriel, S. Vilalai, C. Peot, M. Ramirez, 2006" Statistical Modeling to Forecast Odor Levels of Biosolids Applied to Reuse Sites," ASCE Journal of Environmental Engineering 132(5), 479-488.
  3. S.A. Gabriel, S. Vilalai, P. Sahakij, M. Ramirez, C. Peot, "Models for Improving Management of Biosolids Odors at Wastewater Treatment Plants Taking Into Account Uncertain Factors," June 2008, in review.
National Science Foundation (DMS, Award #0408943) Methods and Models for Stochastic Energy Market Equilibria
  1. J. Zhuang, S.A. Gabriel, "A Complementarity Model for Solving Stochastic Natural Gas Market Equilibria," January 2006, in review.
  2. S.A. Gabriel, J. Zhuang, R. Egging, “Solving Stochastic Complementarity Problems in Energy Market Modeling Using Scenario Reduction,” November 2006, in review.
  3. R. Egging, S.A. Gabriel, F.Holz, J. Zhuang, "A Complementarity Model for the European Natural Gas Market," November 2006, in review.
National Science Foundation (co-PI, S. Gabriel 20%, PI, S. Milner, co-PIs, C. Davis, M. Shayman)
(CNS, Award #0435206)
PROWIN: Broadband Optical/ RF Wireless Networks with Topology and Diversity Control
  1. Y. Shim, S.A. Gabriel, A. Desai, P. Sahakij, S. Milner, "A Fast Heuristic Method for Minimizing Traffic Congestion on Reconfigurable Ring Topologies," September 2005, Journal of the Operational Research Society, accepted.
  2. S.A. Gabriel, Y. Shim, J. Llorca, , S. Milner, "A Multiobjective Optimization Model for Dynamic Reconfiguration of Ring Topologies with Stochastic Load," October 2006, Networks and Spatial Economics, in press.

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