David B. Fogel, PhD, is the Chief Executive Officer of Natural Selection Inc. and was the general chairman of the 2002 IEEE World Congress on Computational Intelligence. Charles J. Robinson, DSc, PE, is Director of the University Center for Biomedical Engineering and Rehabilitation Science at Louisiana Tech University and a Senior Rehabilitation Research Career Scientist with the Shreveport, LA, Veterans Affairs Medical Center. He served as plenary chairman of the 2002 IEEE World Congress on Computational Intelligence.