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The Gecko's Foot: Bio-inspiration: Engineering New Materials from Nature (Anglais) Relié – 17 mai 2006

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Book by Forbes Peter

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Amazon.com: 12 commentaires
11 internautes sur 11 ont trouvé ce commentaire utile 
Fairly unique topic, Well-told 20 juin 2006
Par Jijnasu Forever - Publié sur Amazon.com
Format: Relié
In one of the few books ("Pulse" is another good choice) that focus on bio-inspired processes and products, Forbes explains some interesting applications inspired by lotus, desert beetles, spider silk, and a whole bunch of other examples from Nature. Each chapter focuses on one specific product or theme and hence is fairly independent of the other chapters and can be essentially read in any specific order. The discussion does sometimes may get too technical for a non-science background reader, especially some of the diagrams. However, the discussion in itself is very clear and the reader obtains a good sense of appreciation of the products being envisaged from a particular "inspiration". Excellent information. A must read.
9 internautes sur 10 ont trouvé ce commentaire utile 
Interesting topic. 15 août 2006
Par Joshua C. Williams - Publié sur Amazon.com
Format: Relié
This book is about bio-inspiration for human technology. It is a very interesting subject, but I had some problems with the execution. For example, the chapters seemed to jump arounds a bit, I didn't get a sense of "flow" from chapter to chapter. There were also some factual errors, the most noticable to me being that "helicopters don't fly in the grand canyon". Since I have done so on a tour, I know this statement to be false. Additionally, the author doesn't go very deeply into the science behind the topics he covers. I suppose he may have just been trying to keep it simple, but anyone buying this book is probably a science nerd, and a little more technical information would be welcome.
5 internautes sur 5 ont trouvé ce commentaire utile 
Interesting Subject, Odd Sentence Structures 30 novembre 2008
Par Bookmeister - Publié sur Amazon.com
Format: Relié Achat vérifié
A very interesting and engaging subject, which warrants one to take a closer look at things close by. The format is basically that of reporting the subject, which is fine, but the style is very indirect at times. You could write, "The large house on the corner is red", or you could follow this book's style and write something like, "The main structure, not withstanding its size, which would not be small, was inhabited by those preferring a red exterior and view of a street crossing". Certainly it is just a matter of style. I appreciate the fine efforts made in each chapter on this exciting field of science and technology, and you will be surprised by the applications that can be made of overlooked nature.
1 internautes sur 1 ont trouvé ce commentaire utile 
Our Earthly Classroom 5 février 2010
Par Robert A. Deyes - Publié sur Amazon.com
Format: Broché
Bio-inspiration is a relatively new field of science that is trying to replicate the phenomena and designs of nature in ways that are of benefit to man. The manner in which a gecko's foot allows it to climb glass, the way in which the wings of a butterfly sparkle in the sunlight and the complex methods of flight used by insects have all inspired technologists to emulate nature. More recently the cellular world with its molecular machines has provided a source of ideas for nano-technological design. This 'nanorealm' that is the cell has become the last frontier of natural exploration. Bioinspiration has likewise brought together disparate disciplines of science to tackle some of the major challenges of engineering and medicine - proteins that stick onto silica chips, for example, that may one day help in finding a cure for cancer.

Peter Forbes describes his book as, "the Aladdin's cave of bio-inspired materials and devices" - a 'must have' account for those interested in all things bioinspired. As he remarks, "bioinspiration has opened up a new realm of nature as surely as did the coming of the microscope or the unraveling of the structure of DNA". Yet it is the potential commercialization of a product that makes the field of bioinspiration so captivating. One of Forbes' foremost examples is the leaf of the lotus plant. With its bumpy surface and its water repellency, the lotus leaf can be easily washed free of any dirt- an effect that is now being used in the manufacture of different types of glass and metal coatings. The same effect may soon be applied to clothes as a means of preventing stains.

With its extreme elasticity and strength spider silk is another natural substance that could soon bring about the design of commercially-viable man made products. Spider silk is after all strong enough to trap flying insects without snapping or tearing- a property that has been exploited by fishermen from Papua New Guinea who use spider silk in their fishing nets. The mimicking of natural silks culminated in the invention of Nylon in 1937. But neither Nylon nor any other man made fiber to-date has come close to paralleling the strength of the natural alternatives.

Spiders spin their filamentous fibers from an initially watery solution making a composite structure that is extremely strong. The commercial potential of a synthetic spider silk-like fiber, once it is found, is all too evident. Indeed one entrepreneur has already patented a machine that mimics the mechanics of the spider's spinneret. Perhaps the first applications of any synthetic spider silk will be biomedical. But eventually they might even find use in the manufacture of satellites and space telescopes.

A synthetic material that replicates spider silk is likely to bring lucrative returns to its eventual inventor. Just as attractive for 'bioinspirationalists' are the one billion tiny bristly hairs on the sole of a gecko's foot that help it to stick very efficiently onto surfaces. The underlying secret behind the gecko's remarkable sticking capabilities is an electrostatic force called 'Van der Waals'. So strong is this force that if all the one billion hairs were to be in contact with a surface at any one time, the gecko could hold the weight of a 120 Kg man.

Many novel applications for a synthetic equivalent of the gecko's bristly foot are already being thought of including first aid plasters and insect traps. The ability of the gecko to walk upside down has even inspired one researcher to look at how a similar feat might be achieved by a robot. Other natural methods of attachment such as the strong 'DOPA Glue' used by mussels to stick to rocks and piers may likewise serve as the seeds for man made medical adhesives.

The beauty of nature often stares us in the face luring us to look deeper into the secrets of its designs. Iridescence, the eye-catching display of color that is found on the feathers of peacocks or the wings of butterflies, is caused by the reflection of light at particular wavelengths. For the butterfly wing there is an intricate cavernous labyrinth on the surface of the wing that generates this effect. This effect bears similarities to the way in which light is transmitted through fiber optic cables.

The color changing abilities of animals such as the octopus or brittle stars and the reflective and anti reflective surfaces found in nature are likewise now raising the interest of the military where camouflage is a critical consideration in defense. We find a similar beauty in the design of natural structures such as shells. The red abalone shell fish, for example, uses fifteen different proteins at different times of the shell biomineralization process to produce a structure of exquisite design.

How may we exploit the designs of nature in our own construction? The cantilever bridge that resembles the structure of animal anatomy, the 'badgir' ventilation channels used in houses in Iraq which mirror similar channels in termite mounds, glasshouses that employ the same building principles as those used in the ribbing of water-lilies, geodesic domes that have at their roots the icosehedronal structures of viruses perhaps all reveal the shape of things to come. The self assembly of a bacterial virus called lambda has likewise inspired some researchers such as Harvard's George Whitside to develop self assembling nanostructures. Others have taken to generating molecular hybrids by attaching already existing molecular machines, such as the rotating motor of an enzyme called ATP Synthetase, onto solid surfaces.

Forbes' historical musings on the use of some of these materials are an embellishment to his account. But the underlying message of his story is more profound for it tells of a world that is accessible to learning and creativity by humans. Ours is an earthly 'classroom' seemingly designed for our own learning enjoyment, and displaying an "intrinsic value" which we recognize in our ability to make detailed and accurate scientific observations. It is not only a world that has highly improbable properties but also the kind of world that, as astronomer Guillermo Gonzalez and philosopher Jay Richards observe, "an intelligent agent would have some interest in designing" (see Footnote).

Footnote: This quote taken from Guillermo Gonzalez and Jay Richards (2004), The Privileged Planet, How Our Place In The Cosmos is designed for Discovery, Regnery Publishing Inc, Washington D.C, New York, pp. 306-307
1 internautes sur 1 ont trouvé ce commentaire utile 
How Nature Influences Engineering 2 décembre 2009
Par Kindle Customer - Publié sur Amazon.com
Format: Broché
The Gecko's Foot was an interesting book about how nature has influenced engineering. From self-cleaning surfaces based on the lotus flower to photonic crystals and new ideas about molecular circuitry, this was a fascinating read. Most of the book was easy enough for me, a non-engineer, to understand. The part about optics went right over my head, no matter how much I tried to break it down into small pieces. But it was quite informative in other places. I had always wondered what spider silk is made of and how it works, so it was cool to read that I am not the only person who wondered about that and that even scientists still don't quite understand how the spider does that. I would have liked more pictures, but the ones that were there really helped explain the text. Fun book.
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