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- 2009 - Program Committee, The IFMBE/IMIA 6th International Workshop on Biosignal Interpretation (2009)
- 2008 - Program Committee, Conference on Complexity and Nonlinear Dynamics in the SPIE International Symposium on Smart Materials, Nano- and Micro-Smart Systems (2008)
- 2008 - Associate Editor, IEEE Transactions on Biomedical Engineering (2008-)
- 2007 - Program Committee, SPIE Conference on Complexity II in International Symposium on Microelectronics, MEMS, and Nanotechnology (2007)
- 2007 - Scientific Program Committee, The 19th International Conference on Noise and Fluctuations (2007)
- 2007 - Conference Vice Chair, The 19th International Conference on Noise and Fluctuations (2007)
- 2006 - Program Committee, SPIE Conference on Complexity and Nonlinear Dynamics in International Symposium on Smart Materials, Nano- and Micro-Smart Systems (2006)
- 2006 - Guest Editor, Methods of Information in Medicine, Special Issue on Biosignal Interpretation (2006)
- 2006 - Program Committee Chair, The IFMBE/IMIA 5th International Workshop on Biosignal Interpretation (2006)
- 2005 - Program Committee, SPIE Conference on Complex Systems in International Symposium on Microelectronics, MEMS, and Nanotechnology (2005)
- 2005 - Scientific Program Committee, The 18th International Conference on Noise and Fluctuations (2005)
- 2002 - 2004 Physiology Section Editor, International Journal of Sport and Health Sciences (2002-2004)
- 2004 - Guest Editor, IEEE Transactions on Biomedical Engineering, Special Issue on Recent Advances on Heart Rate Variability Signal Processing and Interpretation (2004)
- 2004 - International Advisory Committee, International Conference on Noise and Fluctuations (2004 --)
- 2004 - Scientific Committee, The Second SPIE Conference on Fluctuations and Noise in Biological, Biophysical, and Biomedical Systems (2004)
- 2003 - Scientific Committee, The First SPIE Conference on Fluctuations and Noise in Biological, Biophysical, and Biomedical Systems (2003)
- 2002 - International Program Committee, The IFMBE/IMIA 4th International Workshop on Biosignal Interpretation (2002)
- 1999 - International Program Committee, The IFMBE/IMIA 3rd International Workshop on Biosignal Interpretation (1999)
- 1997 - Scientific Committee, The 16th International Society of Biomechanics (1997)
- 1996 - Executive Committee, The IFMBE/IMIA 2rd International Workshop on Biosignal Interpretation (1996)