John Bird is the former Head of Applied Electronics in the Faculty of Technology at Highbury College, Portsmouth, UK. More recently, he has combined freelance lecturing at the University of Portsmouth with Examiner responsibilities for Advanced Mathematics with City and Guilds and examining for the International Baccalaureate Organisation. He is the author of over 135 textbooks on engineering and mathematical subjects with worldwide sales of over one million copies. He is a chartered engineer, a chartered mathematician, a chartered scientist and a Fellow of three professional institutions and is currently lecturing at the Defence School of Marine Engineering in the Defence College of Technical Training at H.M.S. Sultan, Gosport, Hampshire, UK, one of the largest technical training establishments in Europe. Carl Ross gained his first degree in Naval Architecture from King’s College, Durham University, his PhD in Structural Engineering from the Victoria University of Manchester, and was awarded his DSc in Ocean Engineering from the CNAA, London. His research in the field of engineering led to advances in the design of submarine pressure hulls. His publications and guest lectures to date exceed some 300 papers, books, etc., and he was Professor of Structural Dynamics at the University of Portsmouth, UK. Carl Ross’s websites have an enormous content on science, technology and education.