ScienceDaily Technology Headlines
for Saturday, December 18, 2010
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Total lunar eclipse and winter solstice coincide on Dec. 21 (December 17, 2010) -- With frigid temperatures already blanketing much of the United States, the arrival of the winter solstice on Dec. 21 may not be an occasion many people feel like celebrating. But a dazzling total lunar eclipse to start the day might just raise a few chilled spirits. ... > full story
The birth of time: Quantum loops describe the evolution of the Universe (December 17, 2010) -- What was the Big Bang and what happened before it? Scientists have attempted to answer the question. Within the framework of loop quantum gravity they have put forward a new theoretical model, which might prove useful for validating hypotheses about events prior to the Big Bang. This achievement is one of the few models describing the full Einstein's theory and not merely its greatly simplified version. ... > full story
Online access with a fingerprint (December 17, 2010) -- A new service makes it possible for users to maintain multiple online accounts using a scan of their fingerprint as a password. ... > full story
Looking back in time to see stars bursting into life (December 17, 2010) -- Astronomers have presented the first conclusive evidence for a dramatic surge in star birth in a newly discovered population of massive galaxies in the early universe. Their measurements confirm the idea that stars formed most rapidly about 11 billion years ago, or about three billion years after the Big Bang, and that the rate of star formation is much faster than was thought. ... > full story
An answer to green energy could be in the air (December 17, 2010) -- In Mark Moore's world, long nanotubes reach into the clouds, serving at once to tether a turbine-vehicle flying at 2,000 feet, or 10,000 feet, or 30,000 feet (610, 3,050 and 9,150 meters); and also to conduct the power that vehicle can harvest from the wind back to Earth. Aloft might be a funnel-shaped blimp with a turbine at its back; or a balloon with vanes that rotate; a truss-braced wing; a parachute; a kite. Any and all of them are ideas being considered by nascent renewable energy industry that is flexing its imagination. ... > full story
Nanotechnology: Tiny channels carry big information (December 17, 2010) -- Researchers have been able to fabricate nanochannels that are only two nanometers in size, using standard semiconductor manufacturing processes. Already they've discovered that fluid mechanics for passages this small are significantly different not only from bulk-sized channels, but even from channels that are merely 10 nanometers in size. ... > full story
Science's breakthrough of the year: The first quantum machine (December 17, 2010) -- Back in March, a group of researchers designed a gadget that moves in ways that can only be described by quantum mechanics -- the set of rules that governs the behavior of tiny things like molecules, atoms, and subatomic particles. In recognition of the conceptual ground their experiment breaks, the ingenuity behind it and its many potential applications, Science has called this discovery the most significant scientific advance of 2010. ... > full story
Cyclone lasting more than five years is detected on Saturn (December 17, 2010) -- Researchers have been monitoring a cyclone on Saturn for more than five years. This makes it the longest-lasting cyclone detected to date on any of the giant planets of the Solar System. Images from the Cassini probe were used to carry out this study. ... > full story
Holography with electrons (December 17, 2010) -- The principle of holography was discovered in 1947 by the Hungarian scientist Dennis Gábor, in connection with attempts to improve the resolution of electron microscopes. The experimental realization of the concept of holography had to wait, however, until the mid-60s. Holograms were then made using newly-discovered laser light sources, rather than with electrons. Physicists have now returned to the use of electrons in holography. A special element in their approach is that the electrons that image the object are made from the object itself using a strong laser. ... > full story
Imaging of Alfvén waves and fast ions in a fusion plasma (December 17, 2010) -- Fusion plasmas in the laboratory typically reach 100 million degrees. These high temperatures are required to ignite the hydrogen plasma and maintain the fusion burn by the production of high-energy alpha particles. One challenge for a fusion reactor is how to contain the alpha particles in the vessel long enough for the particles to efficiently heat the hydrogen plasma. One way that these alpha particles can escape the fusion chamber prematurely is by exciting high frequency Alfvén waves and riding these waves to the vessel walls, like a surfer rides a wave to the beach. ... > full story
Tennis star's hospitalization for altitude sickness (December 17, 2010) -- Former tennis champion Martina Navratilova was hospitalized for pulmonary edema -- fluid build-up in the lungs -- while climbing Mount Kilimanjaro, drawing attention to the high risk of acute mountain sickness (AMS) and high altitude pulmonary edema. ... > full story
Single quantum dot nanowire photodetectors (December 16, 2010) -- Moving a step closer toward quantum computing, researchers recently fabricated a photodetector based on a single nanowire, in which the active element is a single quantum dot with a volume of a mere 7,000 cubic nanometers. ... > full story
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