William Ross Ashby


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William Ross Ashby

De Wikipedia, la enciclopedia libre (20120419)

William Ross Ashby (Londres, 1903 - 1972) fue un médico y neurólogo inglés, que contribuyó decisivamente a la consolidación de la cibernética moderna y creó el primer homeostato (1951), dispositivo electrónico autorregulado por retroalimentación.

Desde las especialidades de la neurología y la psiquiatría, ofreció la reproducción de la estructura y mecanismos de funcionamiento del cerebro humano en sus obras Proyecto para un cerebro (1952) e Introducción a la cibernética (1956).”





From Wikipedia, the free encyclopedia (20120419)

“The Homeostat is one of the first devices capable of adapting itself to the environment; it exhibited behaviours such as habituation, reinforcement and learning through its ability to maintain homeostasis in a changing environment. It was built by William Ross Ashby in 1948 at Barnwood House Hospital. It was an adaptive ultrastable system, consisting of four interconnected Royal Air Force bomb control units[1] with inputs, feedback, and magnetically driven, water-filled potentiometers. It illustrated his law of requisite variety[2] — automatically adapting its configuration to stabilize the effects of any disturbances introduced into the system. It was the realization of what he had described in 1946 as an "Isomorphism making machine".


In 1949 Time described it as "the closest thing to a synthetic brain so far designed by man".[5]

In 1952, Ashby demonstrated it at the ninth Macy conference on cybernetics.[6] In the same year he published a description of the Homeostat in his influential book Design for a brain. In total, between 1946 and 1967, he wrote 38 entries about the Homeostat in his journal.”




De Wikipedia, la enciclopedia libre

Homeostasis (Del griego homo (ὅμος) que significa "similar" y estasis (στάσις) "posición", "estabilidad") es la característica de un sistema abierto o de un sistema cerrado o una conjugación entre ambos, especialmente en un organismo vivo, mediante la cual se regula el ambiente interno (metabolismo), para mantener una condición estable y constante.




Design for a Brain

W. Ross Ashby

Chapman & Hall, Londres, 1952



Design for a Brain

The origin of adaptive behaviour

W. Ross Ashby



Design for a brain

Author: Ashby, William Ross

Subject: Brain -- Physiology; Central nervous system -- Mathematical models; Neurophysiology

Publisher: New York : Wiley 1954


Design for a brain; the origin of adaptive behavior (1960)

Author: Ashby, William Ross

Subject: Calculators; Central nervous system -- Mathematical models; Behavior; Brain -- physiology

Publisher: New York, Wiley 1960



An Introduction To Cybernetics

By W. Ross Ashby




The W. Ross Ashby Digital Archive

William Ross Ashby (1903-1972) was a British pioneer in the fields of Cybernetics and Systems Theory. He is best known for the Law of Requisite Variety, for his books Design for a Brain (1952) and An Introduction to Cybernetics (1956), and for building the Homeostat.

In January 2003, Ross's daughters gave his archive materials to The British Library, London. Then, in March 2004, at the end of the W. Ross Ashby Centenary Conference, they announced that they would make Ross's Journal available on the Internet. This web site fulfills that promise, making this previously unpublished work available on-line.