Most Professional Activities

• Founding (now Emeritus)  Member of the IFIP Working Group  1.3 Foundations of Systems Specification
• Member of the Steering Committee of:
• International Conference on Graph Transformation     ICGT
• Former Member of the Steering Committee of:
• International Workshop on Algebraic Development Techniques     WADT 1997-2017
• Conference on Algebra and Coalgebra in Computer Science     CALCO 2005-2016
• Member of the (current or recent) Program Committee of:
• 6^th International Conference on Graph TransformationICGT 2017   ( 2016    2015 (Co-Chair) -2014    2012 - 2010 - 2008 - 2006 - 2004 (chair) - 2002)
• co-chair Doctoral Symposium at STAF 2016 DS@STAF16  
• 22^nd International Workshop on Algebraic Development Techniques WADT 2014   (2012 - 2010 - 2008 - 2006 - 2004 - 2002 - 2001 - 1999 - 1998 - 1997 (chair) -
• 11^thWorkshop on Graph Transformations and Visual Modeling Techniques GTVMT 2012   ( 2011 - 2010 - 2009 - 2008 - 2007 - 2006)
• 8^thPespectives of Systems Informatics   PSI2011     (2009 - 2006 - 2003 - 2001)
• 2^nd Intern. Workshop on Visual Formalisms for Patterns VFfP2010     ( 2009 )
• International Conference on Model Transformation ICMT2010     ( 2009 )
• 14^th ACM Symposium on Access Control Models and Technologies SACMAT2009     ( 2008 - 2007 - 2006 - 2005 )
• 2^nd Internat. Workshop on Applications of Graph Transformations with Industrial Relevance AGTIVE2003     ( 1999)
• 24^th Internat. Workshop on Graph Theoretic Concepts in Comp. Sci.     WG'98
• 6^th Internat. Workshop on Theory and Applications of Graph Transformations     TAGT 98
• 6^th Internat. Symposium on Design and Implementation of Symbolic Computation Systems     DISCO 90