Wetware

Autor: Dennis Bray
Publisher: Yale University Press
ISBN: 0300155441
File Size: 33,98 MB
Format: PDF, Kindle
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Wetware

Autor: Dennis Bray
Publisher:
ISBN: 9780300167849
File Size: 56,95 MB
Format: PDF, Kindle
Read: 2206
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How does a single-cell creature, such as an amoeba, lead such a sophisticated life? How does it hunt living prey, respond to lights, sounds, and smells, and display complex sequences of movements without the benefit of a nervous system? This book offers a startling and original answer. In clear, jargon-free language, Dennis Bray taps the findings of the new discipline of systems biology to show that the internal chemistry of living cells is a form of computation. Cells are built out of molecular circuits that perform logical operations, as electronic devices do, but with unique properties. Bray argues that the computational juice of cells provides the basis of all the distinctive properties of living systems: it allows organisms to embody in their internal structure an image of the world, and this accounts for their adaptability, responsiveness, and intelligence. In Wetware, Bray offers imaginative, wide-ranging and perceptive critiques of robotics and complexity theory, as well as many entertaining and telling anecdotes. For the general reader, the practicing scientist, and all others with an interest in the nature of life, the book is an exciting portal to some of biology’s latest discoveries and ideas.

Wetware

Autor: Dennis Bray
Publisher:
ISBN: 9780300141733
File Size: 73,24 MB
Format: PDF, ePub, Mobi
Read: 8503
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How does a single-cell creature, such as an amoeba, lead such a sophisticated life? How does it hunt living prey, respond to lights, sounds, and smells, and display complex sequences of movements without the benefit of a nervous system? This book offers a startling and original answer. In clear, jargon-free language, Dennis Bray taps the findings of the new discipline of systems biology to show that the internal chemistry of living cells is a form of computation. Cells are built out of molecular circuits that perform logical operations, as electronic devices do, but with unique properties. Bray argues that the computational juice of cells provides the basis of all the distinctive properties of living systems: it allows organisms to embody in their internal structure an image of the world, and this accounts for their adaptability, responsiveness, and intelligence. In Wetware, Bray offers imaginative, wide-ranging and perceptive critiques of robotics and complexity theory, as well as many entertaining and telling anecdotes. For the general reader, the practicing scientist, and all others with an interest in the nature of life, the book is an exciting portal to some of biology’s latest discoveries and ideas.

Reinventing Gravity

Autor: John W. Moffat
Publisher: Harper Collins
ISBN: 0061982180
File Size: 60,20 MB
Format: PDF, ePub
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Einstein's gravity theory—his general theory of relativity—has served as the basis for a series of astonishing cosmological discoveries. But what if, nonetheless, Einstein got it wrong? Since the 1930s, physicists have noticed an alarming discrepancy between the universe as we see it and the universe that Einstein's theory of relativity predicts. There just doesn't seem to be enough stuff out there for everything to hang together. Galaxies spin so fast that, based on the amount of visible matter in them, they ought to be flung to pieces, the same way a spinning yo-yo can break its string. Cosmologists tried to solve the problem by positing dark matter—a mysterious, invisible substance that surrounds galaxies, holding the visible matter in place—and particle physicists, attempting to identify the nature of the stuff, have undertaken a slew of experiments to detect it. So far, none have. Now, John W. Moffat, a physicist at the Perimeter Institute for Theoretical Physics in Waterloo, Canada, offers a different solution to the problem. The cap­stone to a storybook career—one that began with a correspondence with Einstein and a conversation with Niels Bohr—Moffat's modified gravity theory, or MOG, can model the movements of the universe without recourse to dark matter, and his work chal­lenging the constancy of the speed of light raises a stark challenge to the usual models of the first half-million years of the universe's existence. This bold new work, presenting the entirety of Moffat's hypothesis to a general readership for the first time, promises to overturn everything we thought we knew about the origins and evolution of the universe.

Principles Of Neural Design

Autor: Peter Sterling
Publisher: MIT Press
ISBN: 0262028700
File Size: 61,10 MB
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Two distinguished neuroscientists distil general principles from more than a century of scientific study, "reverse engineering" the brain to understand its design.

Buddha And The Quantum

Autor: Samuel Avery
Publisher: Sentient Publications
ISBN: 1591811066
File Size: 28,38 MB
Format: PDF, Kindle
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Hundreds of books since the "Tao of Physics" have discussed a connection between meditation and modern physics; this one clarifies what it is in both spiritual and scientific terms. Avery's brilliant model of consciousness makes difficult and subtle ideas understandable, surprising you with the implications. He shows that light is visual consciousness: the experience of cells in the retina. Light is not in space; space is in light. Knowing this, relativity and the quanta suddenly make sense.

Life S Ratchet

Autor: Peter M. Hoffmann
Publisher: Basic Books
ISBN: 0465022537
File Size: 12,72 MB
Format: PDF
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A physicist describes how life emerges from the random motion of atoms through sophisticated cellular machinery and describes the long quest to determine the true nature of life from ancient Greece to the study of modern nanotechnology. 20,000 first printing.

Chance And Necessity

Autor: Jacques Monod
Publisher:
ISBN: 9780140256468
File Size: 56,19 MB
Format: PDF, ePub, Docs
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Change and necessity is a statement of Darwinian natural selection as a process driven by chance necessity, devoid of purpose or intent.

The Birth Of The Cell

Autor: Henry Harris
Publisher: Yale University Press
ISBN: 9780300082951
File Size: 18,27 MB
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Henry Harris here provides an account of how scientists came to understand that the bodies of all living things are composed of microscopic units thta we now call cells. Harris turns to the primary literature - the original texts, scientific papers, and correspondance of medical researchers involved in the formulation of the cell doctrine - to reconstruct the events that enabled researchers to comprehend the nature and purpose of cells. Translating many of these documents into English for the first time, Harris uncovers a version of events quite different from that described in conventional science textbooks. Focusing on the scientific history of the genesis of the cell doctrine, the author also considers contemporary social and political contexts and shows how these influenced what experiments were undertaken and how the results were represented.