Sabtu, 20 November 2010

ScienceDaily Technology Headlines

for Saturday, November 20, 2010

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First successful salivary stone removal with robotics (November 19, 2010) -- Doctors report the first use of a surgical robot guided by a miniature salivary endoscope to remove a 20mm salivary stone and repair the salivary duct of a patient. Giant stones have traditionally required complete removal of the salivary gland. This technique not only saves the salivary gland, but reduces blood loss, scarring, and hospital stay. ... > full story

Physicists study behavior of enzyme linked to Alzheimer's, cancer (November 19, 2010) -- Physicists are using complex computer simulations to illuminate the workings of a crucial protein that, when malfunctioning, may cause Alzheimer's and cancer. Their hope is to one day contribute to developing medication that not only can precisely recognize and target a key that causes Alzheimer's or cancer inside a crowded cell, but also then switch a sick cell like that back to its healthy form of interaction at a molecular level. ... > full story

Most powerful supercomputers rated for capabilities using tough new system (November 19, 2010) -- Nine supercomputers have been tested, validated and ranked by the new "Graph500" challenge. The machines were tested for their ability to solve complex problems involving random-appearing graphs, rather than for their speed in solving a basic numerical problem, today's popular method for ranking top systems. ... > full story

Enigma of missing stars in local group of galaxies may be solved (November 19, 2010) -- In the local group of galaxies that includes the Andromeda Nebula and our Milky Way, there are about 100 billion stars. According to astronomers' calculations, there should be many more. Now, physicists may have found an explanation for this discrepancy. ... > full story

Chemicals' study pinpoints threat to workers' lungs (November 19, 2010) -- Tiny particles used in a range of everyday products from computers to shampoo can adversely affect the lungs in very different ways, a study has shown. Research suggests that industrial manufacturers using nanoparticles should be aware of the risks that different types of nanoparticles pose to workers who handle them. ... > full story

Controlling cursors with thoughts: Faster, simpler, and more accurately; advance helps people regulate their own brain response, with therapeutic implications (November 19, 2010) -- Using a new brain-computer training approach, 14 volunteers learned in only six minutes how to move a screen cursor with their thoughts. Near-instant feedback helped the people quickly master some of their own brain responses. ... > full story

Surprise link between weird quantum phenomena: Heisenberg uncertainty principle sets limits on Einstein's 'spooky action at a distance' (November 19, 2010) -- Researchers have uncovered a fundamental link between two defining properties of quantum mechanics. This link constitutes a dramatic breakthrough in our understanding of nature. Non-locality, also described as "spooky action at a distance," is in fact limited by the uncertainty principle. ... > full story

Spacecraft flew through 'snowstorm' on encounter with comet Hartley 2 (November 19, 2010) -- On its recent trip by comet Hartley 2, the Deep Impact spacecraft took the first pictures of, and flew through, a storm of fluffy particles of water ice being spewed out by carbon dioxide jets coming from the rough ends of the comet. The resulting images and data shed new light on the nature and composition of comets. ... > full story

US falls behind other nations in reducing traffic fatalities and injuries (November 19, 2010) -- The United States is missing significant opportunities to reduce traffic fatalities and injuries, and could save lives by implementing a more rigorous, comprehensive program that adopts successful safety practices from other countries, says a new report. ... > full story

Well-known molecule may be behind alcohol's benefits to heart health (November 19, 2010) -- Many studies support the assertion that moderate drinking is beneficial when it comes to cardiovascular health, and for the first time scientists have discovered that a well-known molecule, called notch, may be behind alcohol's protective effects. Down the road, this finding could help scientists create a new treatment for heart disease that mimics the beneficial influence of modest alcohol consumption. ... > full story

Pushing black-hole mergers to the extreme: Scientists achieve 100:1 mass ratio in simulation (November 19, 2010) -- Scientists have simulated, for the first time, the merger of two black holes of vastly different sizes, with one mass 100 times larger than the other. This extreme mass ratio of 100:1 breaks a barrier in the fields of numerical relativity and gravitational wave astronomy. ... > full story

Where's George? Researchers follow the money to define communities in US (November 19, 2010) -- When travel was local, borders and communities were easy to define, but now our connectivity is more complex. Researchers have taken a look at human mobility and redrawn the borders within the United States, showing the country's most connected areas. Some of the borders in this new map are familiar, but many are not. They used data generated by, a website that tracks dollar bills spent across the country. ... > full story

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