Strange nonchaotic attractor in a dynamical system under periodic   forcing
  We observe the occurrence of a strange nonchaotic attractor in a periodically driven two-dimensional map, formerly proposed as a neuron model and a sequence generator. We characterize this attractor through the study of the Lyapunov exponents, fractal dimension, autocorrelation function and power spectrum. The strange nonchaotic attractor in this model is a typical behavior, occupying a finite range of the parameter space. 
Andre S. Cassol (1), Fabio L.S. Veiga (1) and Marcelo H.R.   Tragtenberg(1,2) ((1) Departamento de Fisica da UFSC, Brasil; (...