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WILSON, Robert Charles - Traduit de l'anglais par Gilles Goullet
Vortex
2012 Editions Denoël, collection "Lunes d'encre" - 2012 - In-8, broché, couverture illustrée - 341 pages
Reference : 97235
Bon état - Menus frottements sur la couverture
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5 book(s) with the same title
On the Vibrations of a Vortex Ring, and the Action upon each other of Two Vortices in a Perfect Fluid. Communicated by Lord Rayleigh. Received November 16, - Read December 8, 1881.
(London, Harrison and Sons, 1883). 4to. No wrappers as extracted from ""Philosophical Transactions"" 1883. Vol. 173 - Part II. Pp. 493-521, textillustrations. Fine and clean.
First appearance of Thomson's second paper on the Vortex Atom. In 1882 he had won a prize with the subject ""a general investigation of the action upon each other of two closed vortices in a perfect incompressible fluid""The first attempt to construct a physical model of an atom was made by Lord Kelvin in 1867. The main point was that in an ideal fluid, a vortex line is always composed of the same particles, it remains unbroken, so it is ring-like.""In fact, the investigations of vortices, trying to match their properties with those of atoms, led to a much better understanding of the hydrodynamics of vortices - the constancy of the circulation around a vortex, for example, is known as Kelvin's law. In 1882 another Thomson, J. J., won a prize for an essay on vortex atoms, and how they might interact chemically. After that, though, interest began to wane - Kelvin himself began to doubt that his model really had much to do with atoms, and when the electron was discovered by J. J. in 1897, and was clearly a component of all atoms, different kinds of non-vortex atomic models evolved.""(Michael Fowler).
Bath-Tub Vortex. - [THE CORIOLIS EFFECT ON A BATHTUB VORTEX]
London, Macmillian, 1962. Royal8vo. Bound in contemporary half calf with gilt lettering to spine. In ""Nature"", Vol. 196, October - December. Stamp to pasted down front end-paper and title-page. A fine copy. Pp. 1080-1. [Entire colume: LII, 1346 pp.].
First appearance of Shapiro's famous paper in which he sought to describe a bathtub vortex with the Coriolis Effect. This eventually gave birth to the urban myth that a toilet vortex always will have a counter clockwise flow in the Northern Hemisphere. The Coriolis effect on a micro level is still disputed and has never been satisfyingly confirmed or rejected. Scientists were aware that Earth's rotation alters the trajectory of objects in motion. This phenomenon causes low-pressure weather systems to twist counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. The Coriolis effect, as it's known, had long been well documented as the cause of hurricanes and tornadoes. But despite previous attempts, no one had shown that the effect-first described in 1835 by the French engineer and mathematician Gustave-Gaspard Coriolis-works on very small scales as well. Though in theory it should influence bathwater's exit through a drain, the Coriolis effect was thought to be too small to see.""For his experiment, Shapiro used a circular, flat-bottomed tub with a centered drain hole three-eighths of an inch in diameter to which he attached a 20-foot length of hose, plugged with a stopper at the end. He filled the tank six inches deep with clean, room-temperature water. Small variations-air movement, a temperature change, a surface disturbance-create buoyancy currents that overshadow the Coriolis effect. So Shapiro did much tinkering to cancel out these possible sources of interference-covering the tank with a sheet of plastic to keep out air currents, for example, and carefully controlling the room's temperature. He also filled the tank by swirling water in clockwise, so that if the water drained counterclockwise, the direction would not have been influenced by how the tank was filled.After 24 hours of letting the water settle, Shapiro carefully pulled the plug from the end of the hose, gently placing above the drain a small float made of two crossed slivers of wood an inch long. It took about 20 minutes for the tub to drain completely. For the first 12 to 15 minutes, the float remained motionless. Then it began to rotate almost imperceptibly, counterclockwise, reaching a peak speed of approximately one revolution every three to four seconds. Proving that the Coriolis effect can be detected in a bathtub-size tank, albeit under carefully controlled conditions, was a remarkable achievement. At MIT's latitude of 42°, the effect was ""only thirty-millionths that of gravity, which is so small that it will be overcome by filling and even temperature differences and water impurities,"" reported one of many newspapers and periodicals covering the experiment. Shapiro's results were published in Nature and verified by colleagues who used his technique to demonstrate a clockwise flow in the Southern Hemisphere. The findings fascinated a curious public of all ages. Shapiro would also become known for explaining and improving the aerodynamics of golf ball dimples, as well as for helping to develop the intra-aortic balloon for heart patients and devices to treat blood clots, asthma, emphysema, and glaucoma. But for more than a decade after the bathtub test, he would receive letters and newspaper clippings from all over the world about what was dubbed the ""bathtub vortex"" controversy. "" (MIT Technology Review).
Bath-Tub Vortex. - [THE CORIOLIS EFFECT ON A BATHTUB VORTEX]
London, Macmillian, 1962. Royal8vo. Bound in contemporary full cloth with two black title label to spine. In ""Nature"", Vol. 196, October - December. Library labels to end paper and one library stamp to title page. Light soiling to extremities, internally fine and clean. Pp. 1080-1. [Entire colume: LII, 1346 pp.].
First appearance of Shapiro's famous paper in which he sought to describe a bathtub vortex with the Coriolis Effect. This eventually gave birth to the urban myth that a toilet vortex always will have a counter clockwise flow in the Northern Hemisphere. The Coriolis effect on a micro level is still disputed and has never been satisfyingly confirmed or rejected. Scientists were aware that Earth's rotation alters the trajectory of objects in motion. This phenomenon causes low-pressure weather systems to twist counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. The Coriolis effect, as it's known, had long been well documented as the cause of hurricanes and tornadoes. But despite previous attempts, no one had shown that the effect-first described in 1835 by the French engineer and mathematician Gustave-Gaspard Coriolis-works on very small scales as well. Though in theory it should influence bathwater's exit through a drain, the Coriolis effect was thought to be too small to see.""For his experiment, Shapiro used a circular, flat-bottomed tub with a centered drain hole three-eighths of an inch in diameter to which he attached a 20-foot length of hose, plugged with a stopper at the end. He filled the tank six inches deep with clean, room-temperature water. Small variations-air movement, a temperature change, a surface disturbance-create buoyancy currents that overshadow the Coriolis effect. So Shapiro did much tinkering to cancel out these possible sources of interference-covering the tank with a sheet of plastic to keep out air currents, for example, and carefully controlling the room's temperature. He also filled the tank by swirling water in clockwise, so that if the water drained counterclockwise, the direction would not have been influenced by how the tank was filled.After 24 hours of letting the water settle, Shapiro carefully pulled the plug from the end of the hose, gently placing above the drain a small float made of two crossed slivers of wood an inch long. It took about 20 minutes for the tub to drain completely. For the first 12 to 15 minutes, the float remained motionless. Then it began to rotate almost imperceptibly, counterclockwise, reaching a peak speed of approximately one revolution every three to four seconds. Proving that the Coriolis effect can be detected in a bathtub-size tank, albeit under carefully controlled conditions, was a remarkable achievement. At MIT's latitude of 42°, the effect was ""only thirty-millionths that of gravity, which is so small that it will be overcome by filling and even temperature differences and water impurities,"" reported one of many newspapers and periodicals covering the experiment. Shapiro's results were published in Nature and verified by colleagues who used his technique to demonstrate a clockwise flow in the Southern Hemisphere. The findings fascinated a curious public of all ages. Shapiro would also become known for explaining and improving the aerodynamics of golf ball dimples, as well as for helping to develop the intra-aortic balloon for heart patients and devices to treat blood clots, asthma, emphysema, and glaucoma. But for more than a decade after the bathtub test, he would receive letters and newspaper clippings from all over the world about what was dubbed the ""bathtub vortex"" controversy. "" (MIT Technology Review).
Kamandi n6 La Bête du vortex
AREDIT 1982 1982. Kamandi N°6: La Bête du Vortex/ Aredit 1982 E-D
Très bon état
Jan de Fast Dans la gueule du vortex fleuvre noir
1975 1975. Jan de Fast : Dans la gueule du vortex /Fleuvre noir 1975 LBN18
Bon état
