Quasilinear hyperbolic systems and dissipative mechanisms

The first paper in this volume, by T. Ray, aims to create an instantiation of evolution by natural selection in the computational medium. The second, by K. Naka, discusses the application of white noise analysis to the retinal physiology. It deals with indentification of the retina mathematically, and the reader is shown the results that can be discovered only by using white noise analysis. The last paper, by T. Hilda, illustrates the use of white noise analysis for biologists. It presents the types of topics to which white noise anaysis can be applied and how to apply the theory to actual phenomena Frictional damping; globally defined classical solutions and their nonlinear diffusive phenomena; frictional damping - globally defined weak solutions and their nonlinear diffusive phenomena; relaxation; the influence of the dissipation mechanism on the qualitative behaviour of solutions; viscosity vanishing and nonlinear stability of waves