We study stochastic dynamical systems, both continuous and discrete models models (random walk). The proposed models are applied to problems in bistability and broadcast media túrbids. The phenomenon of stochastic resonance, noise color fractals and disordered systems are other topics on which we are working. Currently, the group is also engaged in research on stock markets. Since the mid 90s, finance has been one of new fields of study for physics. In this new field of econophysics named, the group investigates the crystallization model of price dynamics and their subsequent implementation in the valuation of financial options and portfolio management.