Topical Group on Statistical and Non Linear Physics Real Sociedad Espa�ola de Física imagen1 Structure of the beta-amiliod protein, responsible of degenerative diseases of the nervous system such as Parkinson and sclerosis. imagen2 Vectorial and scalar topological defects in the vector complex Ginzburg-Landau equation. Vectorial defects are surrounded by large domains while scalar defects accumulate at domain borders. imagen3 Exitable chemical reaction in a fluid stirred by a chaotic open flow. The figure shows the activator spatial distribution from a computer simulation of the process. When leaving the system, the substance traces filaments on top of the 'unstable manifold of the chaotic saddle', a fractal region produced by the fluid flow. imagen4 Complex networks allow us to represent the interactions in a complex system. For the brain functional network displayed in the figure, nodes represent small voxels of the brain, while the links indicate when two voxels are related functionally.  

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