W. Ross Ashby: System

W. Ross Ashby was British psychiatrist. Explore interesting quotes on system.
W. Ross Ashby: 52 quotes0 likes

“Duration of selection. At this point a word should be said about how long a given act of selection may take, for when actual cases are examined, the time taken may, at first estimate, seem too long for any practical achievement. The question becomes specially important when the regulator is to be developed for regulation of a very large system. Approximate calculation of the amount of selection likely to be necessary may suggest that it will take a time far surpassing the cosmological; and one may jump to the conclusion that the time taken in actually achieving the selection would have to be equally long. This is far from being the case, however.”

W. Ross Ashby

Source: An Introduction to Cybernetics (1956), Part 3: Regulation and control, p. 260

“The primary fact is that all isolated state-determined dynamic systems are selective: from whatever state they have initially, they go towards states of equilibrium. These states of equilibrium are always characterised, in their relation to the change-inducing laws of the system, by being exceptionally resistant.”

W. Ross Ashby

Source: Design for a Brain: The Origin of Adaptive Behavior (1952), p. 238

“Every stable system has the property that if displaced from a state of equilibrium and released, the subsequent movement is so matched to the initial displacement that the system is brought back to the state of equilibrium. A variety of disturbances will therefore evoke a variety of matched reactions.”

W. Ross Ashby

Source: Design for a Brain: The Origin of Adaptive Behavior (1952), p.54

“Two main lines are readily distinguished. One already well developed in the hands of von Bertalanffy and his co-workers, takes the world as we find it, examines the various systems that occur in it - zoological, physiological, and so on - and then draws up statements about the regularities that have been observed to hold. This method is essentially empirical. The second method is to start at the other end. Instead of studying first one system, then a second, then a third, and so on, it goes to the other extreme, considers the set of all conceivable systems and then reduces the set to a more reasonable size. This is the method I have recently followed.”

W. Ross Ashby

Ashby (1958) "General Systems Theory as a new Discipline". General Systems, 3 (1958). p. 1-6; cited in: Ludwig von Bertalanffy (1968) General System Theory. p. 94-95

“There comes a stage, however, as the system becomes larger and larger, when the reception of all the information is impossible by reason of its sheer bulk. Either the recording channels cannot carry all the information, or the observer, presented with it all, is overwhelmed. When this occurs, what is he to do? The answer is clear: he must give up any ambition to know the whole system. His aim must be to achieve a partial knowledge that, though partial over the whole, is none the less complete within itself, and is sufficient for his ultimate practical purpose”

W. Ross Ashby

Source: An Introduction to Cybernetics (1956), Part I: Mechanism, p. 106, as quoted in: " An Introduction to Cybernetics http://www.ecotopia.com/webpress/nurcap/cybernetics198803.htm," at ecotopia.com

“Every isolated determinate dynamic system, obeying unchanging laws, will ultimately develop some sort of organisms that are adapted to their environments.”

W. Ross Ashby

Ashby (1962), quoted in: V. Lawrence Parsegian (1972) This cybernetic world of men, machines, and earth systems'. p. 178: About the principle of self-organization

“By a state of a system is meant any well-defined condition or property that can be recognised if it occurs again. Every system will naturally have many possible states.”

W. Ross Ashby

Source: An Introduction to Cybernetics (1956), Part I: Mechanism, p. 25

“Cybernetics is likely to reveal a great number of interesting and suggestive parallelisms between machine and brain and society. And it can provide the common language by which discoveries in one branch can readily be made use of in the others… [There are] two peculiar scientific virtues of cybernetics that are worth explicit mention. One is that it offers a single vocabulary and a single set of concepts suitable for representing the most diverse types of system… The second peculiar virtue of cybernetics is that it offers a method for the scientific treatment of the system in which complexity is outstanding and too important to be ignored. Such systems are, as we well know, only too common in the biological world!”

W. Ross Ashby

Source: An Introduction to Cybernetics (1956), Part I: Mechanism, p. 4-5

“[T]he concept of “feedback”, so simple and natural in certain elementary cases, becomes artificial and of little use when the interconnexions between the parts become more complex. When there are only two parts joined so that each affects the other, the properties of the feedback give important and useful information about the properties of the whole. But when the parts rise to even as few as four, if every one affects the other three, then twenty circuits can be traced through them; and knowing the properties of all the twenty circuits does not give complete information about the system. Such complex systems cannot be treated as an interlaced set of more or less independent feedback circuits, but only as a whole.
For understanding the general principles of dynamic systems, therefore, the concept of feedback is inadequate in itself. What is important is that complex systems, richly cross-connected internally, have complex behaviours, and that these behaviours can be goal-seeking in complex patterns.”

W. Ross Ashby

Source: An Introduction to Cybernetics (1956), Part I: Mechanism, p. 54 as cited in: Margaret A. Bode (2006) Mind as Machine: A History of Cognitive Science, Volume 1. p.229