Kaluza-Klein Gravity - Written by J. M. Overduin & P. S. Wesson. Abstract: We review higher-dimensional unified theories from the general relativity, rather than the particle physics side. Three distinct approaches to the subject are identified and contrasted: compactified, projective and noncompactified. We discuss the cosmological and astrophysical implications of extra dimensions, and conclude that none of the three approaches can be ruled out on observational grounds at the present time.
Space-Time-Matter: Modern Kaluza-Klein Theory - Written by Paul S. Wesson. Preface: Einstein endorsed the view of Kaluza, that gravity could be combined with electromagnetism if the dimensionality of the world is extended from 4 to 5. Klein applied this idea to quantum theory, laying a basis for the various modem versions of string theory. Recently, work by a group of researchers has resulted in a coherent formulation of 5D relativity, in which matter in 4D is induced by geometry in 5D. This theory is based on an unrestricted group of 5D coordinate transformations that leads to new solutions and agreement with the classical tests of relativity. This book collects together the main technical results on 5D relativity, and shows how far we can realize Einstein's vision of physics as geometry.
A Mathematical Theory of Communication - Written by C. E. Shannon, know as the "father" of information theory. This fundamental paper reunite and expand various important concepts about information in massages that are communicated in a channel. Those concepts and ideas are important not only to build communication systems, but also to design computation systemas to receive, process and transmit informations. This theory of information is also useful to understand and aspect of the cognitive and neural systems, including artificial neural networks and the natural nervous system.