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An Introduction to Cybernetics, by W. Ross Ashby
Get Free Ebook An Introduction to Cybernetics, by W. Ross Ashby
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Product details
Paperback: 306 pages
Publisher: Martino Fine Books (January 25, 2015)
Language: English
ISBN-10: 9781614277651
ISBN-13: 978-1614277651
ASIN: 1614277656
Product Dimensions:
6.1 x 0.7 x 9.2 inches
Shipping Weight: 1 pounds (View shipping rates and policies)
Average Customer Review:
4.0 out of 5 stars
15 customer reviews
Amazon Best Sellers Rank:
#592,963 in Books (See Top 100 in Books)
Just scanning the table of contents makes me excited! A good introduction to cybernetics.But the actual thrust of this review is to reassure other buyers that the production woes reported by other buyers appear to be solved. The print is legible, pagination is in order, and this is a legit reprint.You can buy this book without those basic worries.Enjoy!
This book is so mind blowing that i bought 2, so i can give one as a gift to a mathematician i know.Really, Cybernetics is so amazing that probably will be the reason that someone will save the world. Probably a few politicians should read this.
More math than I thought. I was looking for and easier read. But did get an idea about requsite variety that was helpful to my studies.
perfect condition, for a class
A fundamental book for systems engineers and control engineers. It sets the principles of our current understanding of robotics or other areas of cybernetics.
This print is extremely poor quality, do not be fooled by the "High Quality" tags on the cover page. I cannot even read the text. Since I'm not in the US i have trouble returning the item to Amazon. So just leaving this comment for everyone else to be aware.
Many books have been written on the topic of control system theory. After reading a number of such books I can say without reservation Dr. Ashby's is the best treatment of the subject, bar none. His perspective is unique and wholly comprehensive.To elaborate let me say that one of the goals of any introductory text is to provide a general overview of the subject matter in as clear and concise of manner as possible. Dr. Ashby does one better. Not only does he accomplish this aim, but while doing so he manages to develop a theoretical and technical foundation of understanding that goes right to the bedrock of eternity itself.For instance one of the most primitive but arcane concepts in all physics is entropy. I personally spent decades trying to reduce entropy to a simple understanding but was always confounded by the "entropy is a measure related to heat engines, but also related to disorder," rhetoric. After all, pragmatically what do heat engines and scrambled eggs have in common? I sure wasn't able to connect the dots in any kind of intelligent way. Moreover it seemed no one else could either. After reading dozens of various books on the matter the explanations of the authors always fell short of offering the simple enlightenment I sought. However, in "Intro to Cybernetics" Dr. Ashby not only explores entropy in a way that is drop-dead simple (the entropy factor is overshadowed by a general principle which governs more than a reservoir of heat energy), but he goes on to show how information and control principles are the flip-side of the entropy principle. Tersely, the entropy principle is abstractly about variety or choice (reflected in Boltzmann's S=kLogW), while information and control is about selection and constraint.Everyone has experience with this model. Consider that laundry taken from a dryer and cast on a bed can potentially fall into a multiplicity of different arrangements. But it is only after a cybernetic mechanism uses certain rules of selection to apply some measure of constraint that the state of the laundry converges to an orderly stack. Also consider that a car moving along a roadway literally has innumerable trajectories it can follow at any point along the path. However cars typically arrive safely at their destinations thanks to a control mechanism which uses sophisticated selection rules to apply constraint to the vehicle so as to avoid disastrous outcomes. Moreover, The unique selections of genes and genetic activity in the metabolisms of various organisms act to constrain the ordering of raw matter to the specific types of structures and behaviors these things possess. This too is an example of how information and control mechanisms limit the possible arrangements of matter to a very narrow subset, i.e. a dog, a cat, etc.In fact, Dr. Ashby is able to show how this abstract model of variety vs. constraint literally expands so as to overshadow everything going on under the sun, from the very simple to the highly sophisticated. Nobody explains this model better than W. Ross Ashby. In fact, I don't know of anyone who's talked about the subject in this manner. For this, I think Dr. Ashby was a true visionary, and surely one of the great minds of science in the twentieth century.An Introduction to Cybernetics is clearly a classic work equivalent to Newton's Principia Mathematica. Everyone with an interest in science and engineering should read it. Some formal training in science and engineering is probably a necessary prerequisite for getting the most from it.
Ashby's revelations are so profound that it's almost a disservice to refer to this as a book. Those revelations will not come easily. Ashby develops a very precise vocabulary and it is essential for understanding to learn and remember their meaning. It is this new vocabulary that makes it possible to see the world in a different light.The impact of those revelations affected my abilities enough that in graduate school cybernetics was made part of the curriculum and later in a business environment the company's middle-management was required to take a course on the subject.Cybernetics (I prefer Informational Mechanics) is a math similar to geometry except that instead of dealing with shapes and space it deals with change, complex change.One particularly important aspect of that subject might be labeled the mechanics of human communication. In a nutshell Ashby shows how concepts from Shannon's Information Theory are applicable to human reasoning and communication. Again understanding those concepts is a life altering experience, but not easy.Learning informational mechanics is a little like learning algebra. You have to understand the fundamentals for it to be useful.I first read the book in 1957. Fifty-five years later I still refer to it.There are a number of copycat books that in essence parrot Ashby's vocabulary. They are relatively useless.
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