The first paper in this volume aims to create an instantiation of evolution by natural selection in the computational medium. The second discusses the application of white noise analysis to the retinal physiology. The last paper illustrates the use of white noise analysis for biologists.

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.