Prof. Denis Butusov is a Head of Computer-Aided Engineering Dept. at the St. Petersburg Electrotechnical University, Russia, where he is also a Head of Youth Research Institute. He has published extensively in nonlinear systems simulation, specifically numerical methods, geometrical integration, memristive circuits, discrete chaotic maps, and a wide variety of applications, including chaotic sensors, nonlinear systems identification, power systems, robotics and chaos-based cryptography. Dr. Butusov and his collaborators are the authors of the controllable symmetry concept in numerical simulations of nonlinear systems. He serves as Associate Editor for the Journal of Control, Automation and Electrical Systems.