About the Author: Grady Hanrahan, PhD, received his doctorate in environmental analytical chemistry from the University of Plymouth, England. Dr. Hanrahan is currently the John Stauffer Endowed Professor of Analytical Chemistry at California Lutheran University with research interests in the use of modern chemometric methods in the design and development of environmental and bioanalytical instrumentation. He is also exploring the use of neural and evolutionary computational techniques for solving complex chemical problems. Frank A. Gomez, PhD, received his BS in chemistry from California State University, Los Angeles (CSULA), and his PhD in chemistry from UCLA, where he was a NIH Predoctoral Fellow. From 1991-1994, he was a Damon Runyon-Walter Winchell Cancer Research Fund Postdoctoral Fellow in the department of chemistry at Harvard University. He is a professor of chemistry at CSULA and is a visiting associate at Caltech in the Applied Physics department.