- IEEE Congress on Evolutionary Computation 2009
- GECCO 2009 (Genetic & Evolutionary Computation Conference)
- 6th International Workshop on Hybrid Metaheuristics (HM 2009)
- 4th International Conference on Learning and Intelligent Optimization (LION4)
- IEEE Swarm Intelligence Symposium 2009 as part of the IEEE Symposium Series on Computational Intelligence
- Workshop on Visual Languages and Logic
- Workshop on Hybrid Metaheuristics and Their Applications under the auspices of ISDA’09
- 5th International Workshop on Hybrid Metaheuristics (HM 2008)
- ANTS 2008, 6th International Workshop on Ant Colony Optimization and Swarm Intelligence
- Diagrams 2008
- IEEE Symposium on Visual Languages and Human-Centric Computing 2008
- Simulated Evolution and Learning: SEAL 2008
- IEEE Congress on Evolutionary Computation (CEC 2007)
- Constraint Programming for Graphical Applications (CPGA 2007)
- IEEE Swarm Intelligence Symposium 2007 as part of the IEEE Symposium Series on Computational Intelligence
- GECCO 2007 (Genetic & Evolutionary Computation Conference)
- 4th International Workshop on Hybrid Metaheuristics (HM 2007)
- IEEE Symposium on Visual Languages and Human-Centric Computing 2007
- Workshop on Visual Languages and Logic
- IEEE Congress on Evolutionary Computation (CEC 2006) as part of the IEEE World Congress on Computational Intelligence
- ANTS 2006, 5th International Workshop on Ant Colony Optimization and Swarm Intelligence
- GECCO 2006 (Genetic & Evolutionary Computation Conference)
- AAAI 2006 Conference on Artificial Intelligence
- 3rd International Workshop on Hybrid Meta-Heuristics 2006
- IEEE Symposium on Visual Languages and Human-Centric Computing 2006
- Diagrams 2006
- GECCO 2005 (Genetic & Evolutionary Computation Conference)
- IEEE Congress on Evolutionary Computation (CEC 2005), Special Stream on Evolutionary Clustering
- FLAIRS 2005 – Special Track on Constraint Solving
- 2nd International Workshop on Hybrid Meta-Heuristics 2005
- Constraint Solving and Language Processing – CSLP 2005
- IEEE Symposium on Visual Languages and Human-Centric Computing 2004: Visual Languages and Formal Methods
- Diagrams 2004
- International Conference on Graph Transformation 2004
- 12th International World-Wide Web Conference 2003
- IEEE Symposium on Visual Languages and Formal Methods 2003
- Diagrams 2002 (program co-chair)
- (2nd International Conference on Theory and Application of Diagrams, April 18-20, 2002 Callaway Gardens, Georgia, USA)
- GTVM 02 (Int. Workshop on Graph Transformation and Visual Modeling Techniques)
- First European Workshop on Diagrammatics and Design
- IEEE Symposia on Human-Centric Computing 2001
- Diagrams 2000 (publicity chair)
- 2nd Workshop on Rule-Based Constraint Reasoning and Programming
- VL 2000 (IEEE Symposium on Visual Languages 2000)
- VL 99 (IEEE Symposium on Visual Languages 99), Track on Theories of Visual Languages (co-chair)
- FRVDR 98 AAAI Fall Symposium homepage (Formalizing Reasoning with Visual and Diagrammatic Representations 98) (co-chair)
- TVL 97 Workshop (Theory of Visual Languages 97) (co-chair)
- TVL 96 Workshop (Theory of Visual Languages 96) (co-chair)