University Service:

• Physics Department Budget Council Advisory Committee, 1999-2002
  
  
  
• Director, The Center for Nonlinear Dynamics, University of Texas, 1985-
  
  
  
• Harrington Graduate Student Fellowship Committe, 2000-
  
  
  
• Committee to Review Dean of College of Natural Sciences, 1999-2000
  
  
  
• Provost Search Committee, University of Texas at Austin, 1997-1998
  
  
  
• Consultative Committee for Vice President for Research, 1994
  
  
  
• Chair Search Committee, Computational and Applied Mathematics Program, 1993-1997
  
  
  
• University Consortium for Atmospheric Research (UCAR) Committee, 1991-1993
  
  

• Physics Department Budget Council Advisory Committee, 1986-1992
  
  
  

Service Outside of the University:

• Member, SIAM J. D. Crawford Prize Committee, 2000-2001
  
  
  
• Member of the Nominating Committee of the National Academy of Sciences, 2000
  
  
  
• Member of the Scientific Committee of International Center for Complex Systems, 2000
  
  
  
• National Advisory Board, Research Resource for Complex Physiologic Signals, 2000-2005
  
  
  
• Electorate Nominating Committee, Section on Physics (B), American Association for the
  Advancement of Science, 2000-2003
  
  

• Advisory Board, SIAM Activity Group on Dynamical Systems, 1999-2001
  
  
  
• Divisional Editor (Fluid Dynamics), Physical Review Letters, 1999-2001
  
  
  
• International Advisory Committee of the VII Latin American Workshop on Nonlinear Phenomena
  Cocoyoc, Mexico, 2001
  
  
  
• International Advisory Committee for 21st IUPAP International Conference on Statistical Physics
  Cancun, July 2001
  
  
  
• Member, Los Alamos National Laboratory Center for Nonlinear Studies, Program Review Committee 1998
  
  
  
• Member, Advisory Board, Society of Amateur Scientists, 1997-1999
  
  
  
• Editorial Board, Nonlinear Science Series, Cambridge University Press, 1988-
  
  
  
• Associate Editor, Physics of Fluids, 1990-1992
  
  

• Editorial Board, Chaos, An Interdisciplinary Journal of Nonlinear Science (AIP), 1991-1995
  
  
  
• Editor, Physica D-Nonlinear Dynamics (North-Holland), 1982-1986
  
  
  
• American Physical Society
  
  
  
  
  • Division Councillor, Fluid Dynamics, 2003-2006
    

  • Executive Board, 1993-1994
    
    
  • Membership Committee, 1993-1995 (Chairman-1995)
    
    
  • Councilor-at-Large, 1991-1994
    
    
  • Member of the Executive Committee, Division of Fluid Dynamics, 1983-1986
    
    
  • Fluid Dynamics Prize Committee, 1986, 1996
    
    
  • Otto Laporte Award Committee, 1988-89 (Chairman, 1989)
    

  
  
  
• Vice-Chairman, Society for Industrial and Applied Mathematics Activity Group on
  Dynamical Systems, 1990 – 1991
  
  
  
• Member, Advisory Board for the Warwick Nonlinear Systems Laboratory, 1986-1989
  
  
  
• Member, Science Board of the Santa Fe Institute, 1987-1996
  
  
  
• Member, Editorial Board of the Santa Fe Institute, 1991-1997
  
  
  
• Member, External Advisory Board, Center for Interdisciplinary Complex Systems,
  University of Arizona, 1987-1989
  
  
  
• Co-organizer, US-Japan Conference on Turbulence and Plasmas, Austin, 7-11 December 1987
  
  
  
• Co-organizer, Dynamics Days, Houston, 5-8 January 1988 and 4-7 January 1989;
  

  Austin, 3-6 January 1990; Houston, 6-9 January 1991; Austin, 8-11 January 1992;
  
  Houston, 4-7 January 1995; Houston, 3-6 January, 1996 (principal organizer of the Austin meetings)
  
  
  

• Co-organizer, Workshop on Computation of Nonlinear Flows and Instabilities,
  Austin, 24-25 March 1989
  
  
  
• Co-organizer, Waves and Patterns in Chemical and Biological Excitable Media, Pushchino,
  USSR, May 1990