Ronald D. Ziemian, PhD, PE, professor of civil engineering at Bucknell University, was the recipient of the 2006 AISC Special Achievement Award and the 1992 ASCE Norman Medal for his work in advancing the use of nonlinear analysis in the stability design of steel structures. He is the coauthor of Matrix Structural Analysis, Second Edition (also from Wiley), chairs the SSRC Executive Committee and the AISC Task Committee 10 on Frame Stability, and further serves on the AISC and Aluminum Association specification committees.