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GAMS Presentations

83rd Working Group Meeting Real World Optimization, November 19-20, 2009, Workshop 'Mathematical Optimization in Transportation -Airline, Public Transport, Railway-', Bad Honnef, Germany
- Michael Bussieck; Column Generation in GAMS - Extending the GAMS Branch-and-Cut-and-Heuristic (BCH) Facility

INFORMS 2009, INFORMing the Globe, October 11th-14th 2009, San Diego, CA
- Michael Bussieck; Lutz Westermann; Pre-Conference GAMS Workshop at INFORMS 2009:
  - Module GAMS - General Algebraic Modeling System
  - Module GAMS - Transportation Model
- Steven Dirkse; GDXMRW: Exchanging Data Between GAMS and Matlab
- Lutz Westermann; Rapid application prototyping with GAMS and Demo Library
- Alexander Meeraus; GAMS - Features you might not know about
- Michael Bussieck; GAMS Branch-and-cut and Heuristic Facility
- Paul van der Eijk; GAMS Data Exchange (GDX) Tools and Utilities
- Erwin Kalvelagen; Data and Software Interoperability with GAMS: A User Perspective

23rd European Conference on Operational Research, July 5th-8th 2009, University of Siegen, Germany
- Michael Bussieck; Jan-Hendrik Jagla; Pre-Conference GAMS Workshop at EURO 2009:
  - Module GAMS - General Algebraic Modeling System
  - Module GAMS - Transportation Model
- Franz Nelissen; Using Utility Computing to provide Mathematical Programming Resources.
- Alexander Meeraus; GAMS – Features you might not know about.
- Michael Bussieck; Stochastic Optimization: Recent Enhancements in Algebraic Modeling Systems.
- Lutz Westermann; Rapid application prototyping with GAMS and Demo Library.
- Jan-Hendrik Jagla; Formulating and solving non-standard model types using gams/emp.

INFORMS Computing Society 2009, January 11th-13th 2009, Charleston, SC
- Steven Dirkse; GAMSWorld and the growing demand for reproducible computational experiments

INFORMS 2008, OR goes to Washington, October 12th-15th 2008, Washington, DC
- Michael Bussieck; Jan-Hendrik Jagla; Lutz Westermann; Pre-Conference GAMS Workshop:
  - Module GAMS - General Algebraic Modeling System
  - Module GAMS - Sudoku and Workshop Library
- Steven Dirkse; GAMS Development Corporation - Rapid Application Prototyping with GAMS and Demo Library.
- Session: "Using COIN-OR via GAMS"
  - Alexander Meeraus; Open-source Quality Assurance and Performance Analysis Tools.
  - Michael Bussieck; GAMS Branch-and-Cut & Heuristic Facility.
  - Stefan Vigerske; Hooking Your Solver to GAMS.
- Steven Dirkse; Holger Heitsch; Scenario Tree Generation for Stochastic Programming Models using GAMS/SCENRED.

Operations Research and Global Business, September 3rd-5th 2008, University of Augsburg, Germany
- Michael Bussieck; Jan-Hendrik Jagla; Lutz Westermann; Pre-Conference GAMS Workshop at OR 2008:
  - Module GAMS - General Algebraic Modeling System
  - Module GAMS - Model Development - Using CHP as an example and Workshop Library
  - Module GAMS - Grid Computing
- Jan-Hendrik Jagla; Michael Ferris; Alex Meeraus; GAMS' Extended Mathematical Programming Framework.
- Franz Nelissen; Is Utility Computing suitable for providing Mathematical Programming Resources?.

IFORS 2008, Operational Research: developing communities, managing the connections amongst them. July 2008, Sandton, South Africa
- Jan-Hendrik Jagla; Lutz Westermann; Pre-Conference GAMS Workshop at IFORS 2008:
  - Module GAMS - General Algebraic Modeling System
  - Module Model Development - Using CHP as an example and Workshop Library
- Lutz Westermann; Michael Bussieck; Global Optimization with GAMS.
- Jan-Hendrik Jagla; Michael Ferris; Alex Meeraus; Extended Mathematical Programming in GAMS.
- Jan-Hendrik Jagla; Lutz Westermann; Recent Enhancements in GAMS.

APMOD 2008, Bratislava, Slovak Republic
- Alexander Meeraus; Franz Nelissen (Preconference Workshop): GAMS - An Introduction
- Franz Nelissen: Is Utility Computing suitable for providing Mathematical Programming Resources?

80th GOR Practice Meeting, Optimization in Manufacturing Execution Systems, April 2008, Ladenburg, Germany
- Jan-Hendrik Jagla; Manufacturing - Is there a Role for Algebraic Modeling Systems?.

INFORMS November 2007, Preconference Workshop, Seattle, WA
- Jan-Hendrik Jagla; Lutz Westermann; GAMS Workshop at INFORMS:
  - Module Introduction
  - Module Transportation Model
  - Module Interfacing with other Applications
  - Module Grid Computing
  - Module Benchmarking

INFORMS November 2007, Session: "Software Demonstration", Seattle, WA
- Steven Dirkse; Rapid Application Prototyping using GAMS.

INFORMS November 2007, Session: "Optimizing Your Optimizer", Seattle, WA
- Michael Bussieck, Steven Dirkse, Jan-H. Jagla, Alex Meeraus; Interactions between Modeling Systems and Advanced Solvers.

INFORMS November 2007, Session: "ICS 10th Anniversary Celebration and Quiz Show", Seattle, WA
- Steven Dirkse; Panel Discussion and Quiz Show.

INFORMS November 2007, Session: "Interfacing to Coin-OR", Seattle, WA
- Michael Bussieck, Steven Dirkse, Stefan Vigerske; COIN-OR/GAMSlinks: Hooking Your Solver to GAMS.
- Steven Dirkse; Solver Panel: Solver Independence

GOR Workshop October 2007, Global Optimization, Bad Honnef, Germany
- Michael Bussieck, Steven Dirkse, Alex Meeraus; Global Optimization with GAMS.

OR September 2007, Pre-Conference Workshop, Saarbrücken, Germany
- Jan-H. Jagla, Lutz Westermann; OR2007 GAMS Workshop.

OR September 2007, Session: "Continuous Optimization, COIN-OR: Open Source Software for Operations Research", Saarbrücken, Germany
- Stefan Vigerske, Michael Bussieck; Interfacing COIN-OR solvers by GAMS.

OR September 2007, Session: "Continuous Optimization, Modern Algorithms and Software for Continuous Optimization", Saarbrücken, Germany
- Lutz Westermann, Michael Bussieck; Global Optimization with GAMS.
- Jan-H. Jagla, Michael Bussieck; GAMS Recent Enhancements.

OR September 2007, Session: "Finance, Banking and Insurance, Applications in Finance", Saarbrücken, Germany
- Franz Nelißen; Grid Computing in Finance using an Algebraic Modeling System.

INFORMS Intl July 2007, Session: "Benchmarking Solvers: Who, What, When, Why, How, How Much?", Puerto Rico
- Steven Dirkse; Preliminary Remarks.

INFORMS Intl July 2007, Session: "Software Seminars", Puerto Rico
- Steven Dirkse, Alex Meeraus; Rapid Application Prototyping with GAMS; System with workshop library.

INFORMS Intl July 2007, Session: "Using Modeling Languages with COIN-OR", Puerto Rico
- Steven Dirkse; Quality Assurance, Performance Analysis, and the GAMS/COIN-OR Solvers.

EURO July 2007, Session: "Preconference Workshop", Prague, Czech Republic
- Jan-H. Jagla; GAMS - Workshop.

EURO July 2007, Session: "Mixed Integer Programming: The State-of-the-Art", Prague, Czech Republic
- Michael Bussieck, Jan-H. Jagla, Stefan Vigerske; Performance of COIN-OR Solvers for the Solution of MINLPs Using GAMS.

EURO July 2007, Session: "COIN-OR: Open Source Software for OR II", Prague, Czech Republic
- Michael Bussieck, Jan-H. Jagla, Stefan Vigerske; Hooking Your Solver to GAMS.

EURO July 2007, Session: "Software Presentation", Prague, Czech Republic
- Jan-H. Jagla; Rapid Development of Optimization-based Decision Support Applications.

78th GOR Meeting, Stochastic Optimization in the Energy Industry, April 2007, Aachen, Germany
- Michael R. Bussieck; Stochastic Optimization: Solvers and Tools.

Annual Review Meeting, Center for Advanced Process Decision Making (CAPD) March 2007, CMU Pittsburgh, PA
- Jan-H. Jagla, Lutz Westermann; GAMS: Productivity - Performance - Reliability.

INFORMS November 2006, Preconference Workshop, Pittsburgh, PA
- Steven Dirkse; Michael Bussieck; GAMS Workshop at INFORMS.

INFORMS November 2006, Session: "Software Demonstration", Pittsburgh, PA
- Steven Dirkse; Michael Bussieck; Rapid Application Prototyping using GAMS.

INFORMS November 2006, Session: "Alan S. Manne (1925-2005): Innovative Energy, Environment and Operations Modeler", Pittsburgh, PA
- Thomas Rutherford; Alan S. Manne: Innovative Approaches to Climate Policy Design.

INFORMS November 2006, Session: "High Throughput Optimization", Pittsburgh, PA
- Michael Ferris; Thomas Rutherford; Decomposition and High Throughput Solution of Equilibrium Problems.

INFORMS November 2006, Session: "The Science of (Optimizing) Better", Pittsburgh, PA
- Steven Dirkse; Michael Bussieck; Armin Pruessner; Performance Analysis of Grid-Enabled GAMS.

INFORMS November 2006, Session: "Cyberinfrastructure and Integer Programming", Pittsburgh, PA
- Michael Ferris; Michael Bussieck; Solving Difficult Mixed-Integer Programming Problems Using GAMS and Condor.

OR September 2006, Pre-Conference Workshop, Karlsruhe, Germany
- Michael R. Bussieck, Franz Nelißen; OR2006 GAMS Workshop.

OR September 2006, Session: Software Presentation, Karlsruhe, Germany
- Franz Nelißen; Rapid Application Prototyping with GAMS.

OR September 2006, Session: Stochastic Programming, Karlsruhe, Germany
- Franz Nelißen; Portfolio Optimization: A Technical Perspective.

OR September 2006, Session: Optimization Tools in Progress, Karlsruhe, Germany
- Michael R. Bussieck, Michael C. Ferris; Solving Difficult MIP Problems using GAMS and Condor.

EURO July 2006, Stream: Software for OR/MS, Reykjavik, Iceland
- Michael R. Bussieck, Michael C. Ferris; Solving Difficult MIP Problems using GAMS and Condor.

APMOD June 2006, Session: OR Software; New Developments, Madrid, Spain
- Franz Nelißen; Rapid Application Prototyping using GAMS.

CORS/OPTIMIZATION DAYS May 2006, Montreal, Canada
- Alex Meeraus, Michael C. Ferris; High Throughput Computing and Sampling Issues for Optimization in Radiotherapy.

INFORMS November 2005, Session "Software Demo", San Francisco, CA
- Michael Bussieck, Steven Dirkse; Rapid Application Development & Grid Computing Using GAMS. Also see the accompanying handout.

INFORMS November 2005, Session "INFORMS Computing Society/ Heuristic Search", San Francisco, CA
- Monique Guignard, Michael Bussieck, Alexander Meeraus, Fred O'Brien, Siqun Wang; A Student-centric Class and Exam Scheduling System at West Point.

GOR Workshop October 2005, "Optimization under Uncertainty", Bad Honnef, Germany
- Franz Nelißen; Optimization under Uncertainty using GAMS: Success Stories and some Frustrations
- Alex Meeraus, Thomas F. Rutherford; Mixed Complementarity Formulations of Stochastic Equilibrium Models with Recourse

ICS January 2005, Session "Network Services and Communication Standards", Annapolis, MD
- Steven P. Dirkse; Linking GAMS to Solvers using the COIN-OR Open Solver Interface

ICS January 2005, Session "SolverSession II - Integer/Combinatorial", Annapolis, MD
- Ignacio E. Grossmann; Computational Experience Solving Disjunctive Programming Problems with LOGMIP

ICS January 2005, Session "Quality", Annapolis, MD
- Armin Pruessner; Software Quality Assurance for Mathematical Modeling Systems

Workshop on Integer Programming and Continuous Optimization, November 2004, Chemnitz, Germany
- Marc C. Steinbach; NLP Reformulation of MINLP under Nonlinear Network Dynamics.
- Sven Leyffer; A Survey of Mixed Integer Nonlinear Optimization.
- Alexander Martin; Approximation of non-linear functions in mixed integer programming.
- Mohit Tawarmalani; Convexification and Global Optimization of Nonlinear Programs.

INFORMS October 2004, Session "COIN-OR: Open-Source Software for OR", Denver
- Michael Bussieck, Steven Dirkse; Linking GAMS to Solvers Using COIN-OSI.

INFORMS October 2004, Session "Software Presentations", Denver
- Armin Pruessner, Alexander Meeraus; GAMS: A High Performance Modeling System for Large-Scale Modeling Applications. Also see the accompanying handout.

GOR Workshop on "Mathematical Optimization Services in Europe", October 2004, Bad Honnef, Germany
- Michael Bussieck, Franz Nelißen; Models and Their Roles

GOR/NGB Joint Conference September 2004, Tilburg, The Netherlands
- Stephan Eidt, Franz Nelißen; Quality Assurance and Algebraic Modeling Systems

CORS/INFORMS Joint International Meeting May 2004, Banff, Canada
- Leon Lasdon; Global Optimization and the GAMS Branch-and-Cut Facility

INFORMS October 2003, Session "Optimization Software - The State of the Art", Atlanta
- Armin Pruessner; Conic Programming in GAMS

INFORMS October 2003, Session "Global Optimization Software in GAMS: Performance and Applications", Atlanta
- Leon Lasdon; OQNLP/GAMS: A Multi-start Approach to Global Optimization
- János D. Pintér; GAMS/LGO Solver Engine for Global and Convex Optimization
- Nick Sahinidis, Mohit Tawarmalani; Global Optimization with GAMS/BARON
- Michael Bussieck, Leon Lasdon, Nick Sahinidis,János D. Pintér; Global Optimization with GAMS - Applications and Performance

INFORMS October 2003, Session "Optimization Modeling in Practice I"
- Steven Dirkse; Applications of MPEC Models

INFORMS October 2003, Session "Optimization Modeling and Techniques"
- Alex Meeraus; Rapid Implementation of Branch-and-Cut with Heuristics using GAMS

Workshop on Optimization/Modeling/Applications - 15 Years GAMS Development - 60 Years Alex Meeraus; September 2003, Washington, DC
- David Kendrick; Themes from GAMS in Computational Economics
- Jan Bisschop; Is there a Future for Modeling Systems
- Bruce McCarl; GAMS as a Tool for Applied Analysis: Significance, and the Future
- Arne Drud; Replaceable Solvers in GAMS
- Alex Meeraus; Past, Present, and Future
- Lloyd Kelly; The Risks, They Just Keep On Coming
- Sherman Robinson; Computable General Equilibrium (CGE) Modeling in GAMS: History and Current State of the Art
- Michael C. Ferris; Optimization of Gamma Knife Radiosurgery
- Alan Manne; Integrated Assessment for Global Climate Change

GAMS Global Optimization Workshop, September 2003, Washington, DC
- Nick V. Sahinidis; Global Optimization with Baron
- János D. Pintér; Global Optimization with GAMS/LGO: Introduction, Usage, and Applications
- Leon S. Lasdon; OQNLP: a Scatter Search Multistart Approach for Solving Constrained Non-Linear Global Optimization Problems
- John Chinneck; MProbe: Mathematical Program Probe

GOTI2003 September, Argonne, IL
- Steven Dirkse; Challenges in Bringing Global Optimization to the Marketplace

OR2003 September, Heidelberg, Germany
- Franz Nelissen; Mathematical Optimization in Finance: Closing the gap

ISMP August 2003, Copenhagen, Denmark, Session "NLP software - state of the art I"
- Arne S. Drud; Detecting Unboundedness in Practical Nonlinear Models
- Steven P. Dirkse; Mathematical Programs with Equilibrium Constraints: Automatic Reformulation and Solution via Constrained Optimization
- Michael R. Bussieck, Leon S. Lasdon, János D. Pintér, Nick V. Sahinidis; Global Optimization with GAMS - Applications and Performance

ISMP August 2003, Copenhagen, Denmark, Session "NLP software - state of the art II"
- Armin Pruessner, Hans D. Mittelmann; Automated Performance Analysis in the Evaluation of Nonlinear Programming Solvers

IEEE Bologna Power Tech, June 2003
- Nicole Gröwe-Kuska, Holger Heitsch, Werner Römisch; Scenario Reduction and Scenario Tree Construction for Power Management Problems;

GOR Workshop on Modeling Languages April 23-25 2003, Bad Honnef
- Josef Kallrath; Introduction: Models, Model Building, and Mathematical Optimization - The Importance of Modeling Languages for Solving Real-World Problems
- Hermann Schichl; Modeling Languages and Global Optimization
- Sofiane Oussedik; ILOG OPL Studio - Technical Overview
- Jan Bisschop; AIMMS - An All-Round Development Environment
- Robert Fourer, David Gay; AMPL - A Modeling Language for Mathematical Programming
- M.R. Bussieck, A. Meeraus; GAMS - General Algebraic Modeling System
- Bob Daniel; XPRESS - Mosel with an additional handout
- Klaus Schittkowski; PCOMP - A Modeling Language for Nonlinear Programs with Automatic Differentiation

INFORMS November 2002, Session "Benchmarking & Performance Testing of Optimization Software"
- Armin Pruessner; Automated Performance Testing and Analysis
- Hans D. Mittelmann; Benchmarking Large-Scale Optimization Software
- Arne S. Drud; Testing and Tuning a new Solver Version using Performance Tests

INFORMS November 2002, Session "Advances in Algebraic Modeling"
- Alex Meeraus; Who Needs the GAMS World?
- Arne S. Drud; Novel Problem Types and Algorithms
- Thomas Rutherford; Economic Equilibrium Analysis with GAMS/MPSGE
- Hans D. Mittelmann; An Online Forum for Performance Testing

INFORMS November 2002, Session "New Initiatives in Global Optimization"
- Michael R. Bussieck, Steven P. Dirkse, Alexander Meeraus, Armin Pruessner; Quality Assurance and Global Optimization; (PAVER results for the Example)

Cocos'02 (Global Constrained Optimization and Constraint Satisfaction), October 2002, France
- Nick Sahinidis; Global Optimization and Constraint Satisfaction: The Branch-and-Reduce Approach
- Michael R. Bussieck, Arne S. Drud, Alexander Meeraus; Quality Assurance and Global Optimization; (PAVER results for Example 2)

ExxonMobil Optimization and Logistics Mini-Symposium, Annandale, NJ, August 2002
- Michael R. Bussieck, Alexander Meeraus; General Algebraic Modeling System: GAMS

ESCAPE-12 (European Symposium on Computer Aided Process Engineering), 26 - 29 May 2002, The Hague, The Netherlands
- Y. Ota, K. Namatame, H. Hamataka, K. Nakagawa and H. Abe (Japan), A. Cervantes, I.B. Tjoa and F. Valli (USA); Award Winning Presentation: Optimization of Naphtha Feedstock Blending for Integrated Olefins-Aromatics Plant Production Scheduling

SIAM Optimization Meeting, May 2002, Toronto
- Arne S. Drud; On the Use of Second Order Information in GAMS/CONOPT3

INFORMS November 2001, Session "Quadratic Assignment & Related Problems"
- Michael R. Bussieck, Monique Guignard, Siqun Wang; Modeling with Quadratic Constraints to Improve Exam Timetabling Solutions

OR 2001, Section "Energy and Environment", Prof. Dr. Rüdiger Schultz, Gerhard-Mercator-University of Duisburg, Dr. Wilfried Pohl, RWE Systems AG
- Gary A. Goldstein, Ad Seebregts; Energy/Environmental Modeling with the Markal Family of Models
- Gary A. Goldstein, Uwe Remme, Ulrich Schellmann, Christoph Schlenzig; MESAP/Times-Advanced Decision Support for Energy and Environmental Planning
OR 2001, Section "Continuous Optimization", Prof. Dr. Friedrich Juhnke, Otto-von-Guericke-University of Magdeburg, Prof. Dr. Florian Jarre, Heinrich-Heine-University of Düsseldorf
- Michael R. Bussieck, Arne Drud; SBB: A New Solver for Mixed Integer Nonlinear Programming
- Arne Drud; Solving NLP Models in a Branch & Bound Context
- Steven Dirkse, Michael C. Ferris; Solving NLP Models as Complementary Problems
- Michael R. Bussieck, Alexander Meeraus; Global Optimization Initiative
- Michael C. Ferris, Jeffrey Horn; Automatic Conversion of Nonlinear Programs to Complementary Problems
- Michael C. Ferris, Meta Voelker; Slice Models in GAMS
OR 2001, Section "Discrete and Combinatorial Optimization", Prof. Dr. Alexander Martin, Technical University of Darmstadt, Prof. Dr. Peter Brucker, University of Osnabrück
- Alexander Meeraus, Frederick P. O'Brien; Class Scheduling at the USMA at West Point
- Michael R. Bussieck, Frederick P. O'Brien; Term End Exam Scheduling
- Michael C. Ferris, David M. Shepard; Optimization of Gamma Knife Radiosurgery
INFORMS May 2001, "Optimizing the Extended Enterprise in the New Economy"
- José Vicente Caixeta-Filho, Jan Maarten van Swaay-Neto, Antonio de Pádua Wagemaker; Optimization of the Production Planning and Trade of Lily Flowers at Jan de Wit Co.
INFORMS Fall 2000, Session "Recent Advances in Nonlinear Mixed Integer Optimization"
- Ignacio E. Grossmann, Aldo Vecchietti; Recent Developments in Disjunctive Programming
- Michael R. Bussieck, Arne Drud; SBB: A New Solver for Mixed Integer Nonlinear Programming
- Mohit Tawarmalani, Nickolaos V. Sahinidis; Mixed Integer Nonlinear Programs; Theory, Algorithms and Applications
INFORMS Fall 2000, Session "Optimization and Modeling for Human Experts"
- Fred O'Brien, Michael R. Bussieck, Alexander Meeraus; Academic Scheduling at United States Military Academy West Point, NY
- David M. Shepard, Michael C. Ferris; Computerized Treatment Planning for Stereotactic Radiosurgery
- Michael R. Bussieck, Lloyd R. Kelly; Blending Data, Models and Human Expertise
INFORMS Fall 2000, Session "Novel Applications in the Energy Industry"
- Gary Goldstein; Assessing Energy/Economy/Environment Interaction Using the MARKAL Family of Models
- Lloyd R. Kelly; The Utility Fuel Economics - National Power Model Forecasting System
- Josef H. Bogensperger; Weekly Asset Portfolio Management in a Hydro-Thermal Power System
ICCP 1999, Madison
- Steven Dirkse; Complementarity at GAMS Development
SP 1998, Vancouver, Canada
- Steven Dirkse; Stochastic Programming using GAMS