Dr. Igor A. Karnovsky, Ph.D.,is a specialist in structural analysis, theory of vibration and optimal control of vibration. He has over 50 years of experience in research, teaching, and consulting in this field. He is the author of many scientific papers, and six books in Structural Dynamics and Structural Analysis, published with McGraw Hill and Springer in 2001-2016. He also holds a number of vibration-control-related patents. Olga Lebed,.M.Sc. is a specialist in mechanics of materialsand structural analysis. She has more than 10 years of experience in teaching engineering courses, and more than 20 years of industry experience working in the fields of engineering and computer programming in 3D modelling. She is co-author of four books in Structural Dynamics and Structural Analysis published with McGraw Hill and Springer in 2001-2010.