A collaboration of University of Pennsylvania chemists and engineers has performed multi-scale modeling of ferroelectric domain walls and provided a new theory of behavior for domain-wall motion, the “sliding wall” that ...
General Physics
Oct 10, 2007
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A stem cells’ immediate neighborhood, a specialized environment also known as the stem cell niche, provides crucial support needed for stem cell maintenance. But nothing lasts forever, found scientists at the Salk Institute ...
Oct 10, 2007
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A new study by Kevin Pope of Geo Eco Arc Research and John Terrell of The Field Museum adds insight into the migration of anatomically modern humans out of Africa and into Asia less than 100,000 years before present (BP).
Oct 10, 2007
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A new, rapid and cheap way of estimating the potential risk posed to human health by volcanic ash has been devised by a Durham University expert.
Environment
Oct 10, 2007
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Software under development at Ohio State University is helping scientists operate big-budget research instruments -- such as high-powered microscopes and telescopes -- over the Internet, more safely and efficiently than was ...
Software
Oct 10, 2007
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The protein Oct4 plays a major role in embryonic stem cells, acting as a master regulator of the genes that keep the cells in an undifferentiated state. Unsurprisingly, researchers studying adult stem cells have long suspected ...
Oct 10, 2007
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Among scientists, it is widely believed that there is no such thing as an aether – a medium pervading all space that allows light waves to propagate, similar to how sound needs air or water – but a part of its spirit ...
A recent analysis of images from NASA's Cassini spacecraft provides conclusive evidence that the jets of fine, icy particles spraying from Saturn's moon Enceladus originate from the hottest spots on the moon's "tiger stripe" ...
Space Exploration
Oct 10, 2007
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NASA's Dawn spacecraft successfully completed the first test of its ion propulsion system over the weekend. The system is vital to the success of Dawn's 8-year, 1.6 billion-mile (3-billion-kilometer) journey to asteroid Vesta ...
Space Exploration
Oct 10, 2007
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Scientists at the U.S. Department of Energy's Brookhaven National Laboratory have developed a method for correlating the results of microscopic imaging techniques in a way that could lead to improved understanding, diagnosis, ...
General Physics
Oct 10, 2007
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