Physics
- Physics
Dune leapfrogging is deciphered
Some wind-propelled sand dunes can pass right through each other if their relative sizes are right, new computer simulations indicate—although the sand grains of one dune don't actually penetrate through the other dune.
- Physics
Dune leapfrogging is deciphered
Some wind-propelled sand dunes can pass right through each other if their relative sizes are right, new computer simulations indicate—although the sand grains of one dune don't actually penetrate through the other dune.
- Physics
Hints emerge of a four-quark particle
Previously observed only in twos, threes, and perhaps in fives, quarks and antiquarks in a newfound particle may have glommed together to form a never-before-seen foursome.
- Physics
Particle Interactions
The world’s leading particle physics laboratories have collaborated to provide a one-stop online resource for communicating research in the world of particle physics. Updated daily, the site provides news stories, science policy papers, conference information, and much more. An image bank contains photos and illustrations showing accelerators, detectors, particle collisions, historical events, aerial views, and […]
- Physics
Doppler Toppler: Experiment upends normal frequency shift
The expected drop in frequency of a signal from a receding source—the Doppler effect—becomes a frequency increase when a high-current electric pulse creates extraordinary electromagnetic conditions in a web of electrical components.
- Materials Science
This Won’t Hurt . . . Tiny needles deliver drugs painlessly
Microscopic needles may provide a painless alternative to syringes and patches.
- Materials Science
No Assembly Required: DNA brings carbon nanotube circuits in line
Using DNA as a scaffold, researchers have devised a simple way of creating carbon nanotube transistors—a feat that paves the way for more complex circuits made from these nanomaterials.
- Physics
Quantum Pileup: Ultracold molecules meld into oneness
Scientists have for the first time transformed molecules into an exotic state of matter called a Bose-Einstein condensate.
- Physics
Humpty-Dumpty Effect: Acoustically, people resemble large eggs
The first measurements of how people intrinsically scatter sound waves indicate that, acoustically, a human body resembles a hard ellipsoid of the same height and girth as the person.
- Materials Science
Water Repellency Goes Nano: Carpet of carbon nanotubes cleans itself
Forests of carbon nanotubes coated with Teflon yield a superhydrophobic material—the ultimate self-cleaning surface.
- Physics
New type of material that heat can’t bloat
A newfound material exhibits the desirable property of not expanding when heated over a wide temperature range, but from an apparent cause never seen before—electrons changing positions inside the new compound's crystal structure.
- Physics
Shedding Light on the Infrared
For students and teachers, this NASA-sponsored Web site offers illuminating insights into infrared light. It explains the fundamentals of infrared astronomy, using animations, images, classroom lessons and activities, games, and more. Take a look at infrared views of familiar objects, from Yellowstone’s “Old Faithful” geyser to a pot-bellied pig. Go to: http://coolcosmos.ipac.caltech.edu/
