Download e-book for kindle: A Cybernetic View of Biological Growth: The Maia Hypothesis by Tony Stebbing

By Tony Stebbing

ISBN-10: 0511933819

ISBN-13: 9780511933813

ISBN-10: 0521199638

ISBN-13: 9780521199636

Maia is the tale of an concept, and its improvement right into a operating speculation, that gives a cybernetic interpretation of ways progress is managed. development on the lowest point is managed through regulating the speed of progress. entry to the output of regulate mechanisms is supplied via perturbing the turning out to be organism, after which filtering out the results to progress price. The output of the expansion regulate mechanism is then available for interpretation and modeling. Perturbation experiments were used to supply interpretations of hormesis, the neutralization of inhibitory load and bought tolerance to poisonous inhibition, and catch-up development. The account starts with an creation to cybernetics overlaying the rules of development and inhabitants bring up in animals and guy and describes this new method of entry the regulate of development tactics. This e-book is acceptable for postgraduate scholars of organic cybernetics and researchers of organic progress, endocrinology, inhabitants ecology and toxicology.

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Extra info for A Cybernetic View of Biological Growth: The Maia Hypothesis

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Clostridium perfringens multiplies even more rapidly, with a doubling time of 10 minutes. Densities may reach 10 billion per millilitre before the exponential phase of growth slows down when nutrients are depleted and the byproducts of metabolism accumulate to toxic concentrations, bringing cell division to a halt. 2). Either the pathogen itself, or the toxins produced, then rapidly overwhelm the body’s natural defences. Bubonic plague killed one person in four throughout Europe in the fourteenth century, amounting to 25 million deaths in all.

This is growth at its most spectacular and helps explain how cell numbers that start so small may grow in weeks to densities of 10 million cells per litre, to dominate the summer surface waters of great tracts of the world’s ocean. Bacteria are primitive life forms, usually multiplying even more rapidly than microalgae. They are probably the earliest life forms to colonise the planet and occur almost everywhere in their unseen myriads. In natural waters, densities of thousands per millilitre are typical; fertile soils have millions per gram, while in faeces there are billions per gram.

E. Smith in 1954 [8], and has been elaborated several times by ecologists since then. 4). A graph of r against generation time, for organisms of all sizes from micro-organisms to humans, shows a declining linear trend from the smallest to the largest. It is the smallest animals, with the shortest generation time, that have the highest relative growth rates. 4), it can be seen how the relative rate declines and generation time increases in approximate order of size. The graph of relative growth rate against generation time produces a remarkable result: the fastest-growing animals, with the shortest generation time, tend to be smaller and simpler organisms, while the slower-growing animals with longer generation times tend to be larger and more complex organisms.

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A Cybernetic View of Biological Growth: The Maia Hypothesis by Tony Stebbing

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