News tagged with concentric rings
Silicon photonic crystals key to optical cloaking
Jun 25, 2008 |
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In computer simulations, the researchers have demonstrated an approximate cloaking effect created by concentric rings of silicon photonic crystals. The mathematical proof brings scientists a step closer to a practical solution ...
Search results for concentric rings
'Invisibility cloak' could protect against earthquakes
Jul 20, 2009 |
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(PhysOrg.com) -- Research at the University of Liverpool has shown it is possible to develop an 'invisibility cloak' to protect buildings from earthquakes.
'Gecko vision': Key to the multifocal contact lens of the future?
May 07, 2009 |
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Nocturnal geckos are among the very few living creatures able to see colors at night, and scientists' discovery of series of distinct concentric zones may lead to insight into better cameras and contact lenses.
Cassini Reveals New Ring Quirks, Shadows During Saturn Equinox
Space & Earth / Space Exploration
Sep 21, 2009 |
4.6 / 5 (9) |
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(PhysOrg.com) -- NASA scientists are marveling over the extent of ruffles and dust clouds revealed in the rings of Saturn during the planet's equinox last month. Scientists once thought the rings were almost ...
Australia's climate: Drought and flooding in annual rings of tropical trees
Space & Earth / Earth Sciences
Jun 11, 2009 |
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Annual rings are acclaimed in representing natural climate archives. For the temperate latitudes it is known that the growth of these annual rings depend mainly on temperature and precipitation. In the tropics, however, ...
Saturn's Crazy Christmas Tilt
Space & Earth / Space Exploration
Dec 22, 2008 |
3.7 / 5 (3) |
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You look through the telescope. Blink. Shake your head and look again. The planet you expected to see in the eyepiece is not the one that's actually there. Too much eggnog? No, it's just Saturn's crazy Christmas ...
Ghostly 'Spokes' Puff Out From Saturn's Ring's (w/ Video)
Space & Earth / Space Exploration
Nov 16, 2009 |
4.5 / 5 (6) |
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(PhysOrg.com) -- Massive, bright clouds of tiny ice particles hover above the darkened rings of Saturn in an image captured by the Cassini spacecraft on Sept. 22, 2009, around the time of Saturn's equinox. ...
Study of 'Persistent Currents' Finally Verifies Theory
Apr 28, 2009 |
4.7 / 5 (23) |
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(PhysOrg.com) -- Approximately 20 years ago, scientists discovered that is is possible for an electric current to flow endlessly in a ring made of a normal metal. One might think that such an 'old' finding ...
New model of a nuclear pore complex is based on crystal structure of its key component
Biology /
Jan 16, 2008 |
3.3 / 5 (3) |
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Everything that goes in and out of a cell’s nucleus must pass through one of its nuclear pores. In the second nuclear pore study to come out of Rockefeller University in as many months, researchers have determined the crystal ...
Small optical force can budge nanoscale objects
Nov 17, 2009 |
4.8 / 5 (13) |
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(PhysOrg.com) -- Engineering researchers have used a very tiny beam of light with as little as 1 milliwatt of power to move a silicon structure up to 12 nanometers.
Cave's climate clues show ancient empires declined during dry spell
Space & Earth / Earth Sciences
Dec 04, 2008 |
4.3 / 5 (34) |
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(PhysOrg.com) -- The decline of the Roman and Byzantine empires in the Eastern Mediterranean more than 1,400 years ago may have been driven by unfavorable climate changes.
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