About the Editor Mohamed E. El-Hawary has been Professor and Associate Dean of Engineering at DalTech of Dalhousie University (formerly the Technical University of Nova Scotia) since 1981. He has written more than 150 technical papers, mainly in power system engineering, and is an author of three textbooks: Power Systems Analysis, Principles of Electric Machines, and Control System Engineering. He is also coauthor of two research monographs on economic operations of power systems. Dr. El-Hawary chairs the IEEE Power Engineering Society Operating Economics Subcommittee, Life Long Learning Subcommittee, and Awards and Recognitions of the System Operations and Dynamic Performance Committee. He is associate editor of Electric Machines and Power Systems and the International Journal of Electric Energy and Power Systems. Dr. El-Hawary is also a member of the Board of IEEE Press and IEEE Awards Board and serves as editor of the IEEE Press Understanding Science and Technology Series.