With the challenges our society faces concerning energy and the environment, it is particularly vital to develop a more rational use of our resources, both renewable and non-renewable. A sustainable use of the available resources is only possible if engineers can rely on coherent indicators, among which the exergy efficiency is bound to play a major role.

The Human brain is only 100,000 years old. Yet, this newly evolved organ endows us with unique creative capabilities beyond all other living creatures, including the gift to understand itself. As our very survival and success in life depends on utilizing our brain’s power, intense efforts have begun worldwide to understand the brain, reverse-engineer it and even augment its capacity.