Chaos and nonlinear dynamics: Advances and perspectives G. Károlyi, A. de Moura, M. C. Romano, M. Thiel and J. Kurths Eur. Phys. J. Special Topics, 165 (2008) 1-4 Published online: 11 December 2008 DOI: 10.1140/epjst/e2008-00843-3