Uncategorized
- Tech
Technique puts more data into airwaves
A new approach that exploits the orientations of the electric and magnetic fields in radio waves may increase data flows to and from cell phones and other wireless devices by up to a factor of six.
- Math
Scheduled random walks skirt collisions
Researchers in theoretical computer science have made progress in settling the question of whether a clairvoyant scheduler can regulate the timing of moves by random walkers on a grid to keep them from ever colliding.
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Protein May Tie Obesity to Diabetes
A newly discovered protein secreted by fat cells could be the link between obesity and type II diabetes.
- Astronomy
Eerie Sounds of Space
NASA’s Cassini spacecraft, approaching Jupiter, is detecting electromagnetic waves at low radio frequencies in the thin gas of charged particles that fills the space between the sun and its planets. Converting such waves into sound makes them eerily audible. Go to: http://www.jpl.nasa.gov/cassini/acoustic/ and http://www.jpl.nasa.gov/cassini/english/press/scinews/scinews001230a.html
- Earth
Amazon basin is wetter now than in past
Sediments from the Atlantic Ocean indicate that the now lush Amazon Basin was much drier during the latest ice age.
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18898
Both definitions of “source of the Amazon” advanced by its would-be finders are capricious. They imply that a river can be a lesser stream than its tributary, which runs counter to any plausible definition of tributary. Travel up the Amazon and at every fork take the branch with greater water flow. You will eventually reach […]
- Earth
Explorers pinpoint source of the Amazon
A five-nation team of explorers has used Global Positioning System equipment to confirm that the source of the Amazon is a snowmelt-fed stream high in the Peruvian Andes.
- Chemistry
For a better smile, have some wasabi
Chemicals in the Japanese condiment wasabi could help prevent tooth decay.
- Chemistry
Where the tire meets the conveyor belt
A new, noninvasive technique could detect an impending failure in a rubber tire or conveyor belt.
- Health & Medicine
Cocaine link to heart attack bolstered
Regular cocaine use may account for one-fourth of nonfatal heart attacks in people under age 45.
- Health & Medicine
Gene mutation can spur autoimmunity
A mutation of a gene on the X chromosome can lead to a dangerous autoimmune disorder and type I diabetes.
- Astronomy
A Jovian moon lost and found
After 25 years, astronomers have relocated a tiny satellite of Jupiter.
