Uncategorized
- Physics
Scaling energy barriers to save data
Researchers demonstrate a promising new way to make semiconductor-based memory that doesn't erase when the power goes off.
- Physics
Spectral atom rings in
Electron waves can generate a phantom atom when a real atom is placed at the right spot inside an elliptical quantum corral, or loop of atoms, arranged on a surface.
- Humans
From the August 13, 1932, issue
ONLY HALF OF LIGHTNING FLASH IS SEEN BY OBSERVERS Not many years ago, a thunderstorm often meant that the supply of electricity would be interrupted. But now, lightning does not cause power line failures nearly as frequently as it used to; it has been tamed by engineers. Laboratory artificial power lines that duplicate actual conditions […]
- Health & Medicine
One more reason to worry
A single dose of the AIDS drug nevirapine, given to mothers to help prevent them from infecting their children during birth, may be enough to prod the virus to develop drug resistance.
- Health & Medicine
HIV may date back to the 1930s
Genetic analysis of the AIDS virus suggests it first infected humans in the first third of the 20th century.
- Health & Medicine
AIDS drugs may cause bone loss
Using X rays to measure bone density in HIV-infected men, researchers find a possible link between bone loss and long-term use of protease inhibitors.
- Math
Prepping for Calculus
The “Calculus Page” Web site provides links to a variety of resources for calculus students and teachers, from problem sets with step-by-step solutions to tips on preparing for exams. Linked sites offer online tutorials and courses, sample exams, animated examples, mathematical software, and information on calculus competitions and the history of calculus. Go to: http://www.calculus.org/
- Astronomy
Revved-Up Universe
Astronomers are busy testing the seemingly bizarre notion that the expansion of the universe is accelerating.
- Physics
Ultracold molecules form inside superatom
The formation of molecules within an ultracold gas of atoms called a Bose-Einstein condensate could be a step toward fluids in which molecules share the same quantum state.
- Animals
Flight puts the fight back into crickets
Researchers are just discovering what gamblers in China have known for centuries—flying can make a losing cricket fight again.
- Chemistry
Stopping batteries from starting fires
A new flame-retardant substance could make rechargeable lithium-ion batteries practical for powering electric vehicles.
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Sleepyheads’ brains veer from restful path
Unusual patterns of brain activity appear in sleep-deprived volunteers trying to solve verbal and mathematical problems.
