writing technical material, a photographic memory of the technical literature, and an insistence that there be no spelling or grammatical errors (this last quality earned him the nickname “gimlet eye”). Furthermore he didn’t allow any question marks to be missed (he would say “I think we’ve missed a little ‘buttonhook’ at the end of the penultimate sentence”).
At the time of his death, Warren had almost completed Computer-Aided Modeling of Chemically Reactive Systems (by Warren E. Stewart and Michael Caracotsios), along with accompanying software. This book provides an overview of chemical kinetics and reactor modeling, as well as an extensive description of strategies for parameter estimation based on noisy and incomplete data sets. An interactive software package is included that can perform modeling and parameter estimation calculations based on the problem details supplied by the user.
Despite his quiet demeanor and modesty, Warren received many awards for his research and teaching: Elected Fellow of the American Institute of Chemical Engineers (AIChE) (1973); Citation Classic status for Transport Phenomena (see Current Contents, 17 September 1979); Citation Classic status for “Solution of Boundary Value Problems by Orthogonal Collocation” (see Current Contents, 21 September 1981); Alpha Chi Sigma Research Award of AIChE (1981); Benjamin Smith Reynolds Award for Excellence in Teaching, University of Wisconsin College of Engineering (1981); Chemical Engineering Division Lectureship Award, American Society of Engineering Education (1983); Honorary Member of Phi Beta Kappa (1983); McFarland-Bascom Professorship (1983); Computing in Chemical Engineering Award, CAST Division of AIChE (1984); E.V. Murphree Award in Industrial and Engineering Chemistry, American Chemical Society (1989); Byron Bird Award for Outstanding Research Publication, University of Wisconsin College of Engineering (1991); and membership in the National Academy of Engineering (1992). The hallmark of Warren’s career was understated excellence in his work and unfailing kindness to students and colleagues.
He was given honorary membership in Phi Beta Kappa for his exceptional scholarship and his extensive contributions to