- Smaller Is Stronger- And Here's The Science Reason Why
As structures made of metal get smaller — as their dimensions approach the micrometer scale (millionths of a meter) or less — they get stronger. Scientists discovered this phenomenon 50 years ago while measuring the strength of tin "whiskers" a f ...
Article - News Staff - Jan 3 2008 - 10:30am
- Light From Crystals Means Next Generation LED Modules
For the past 40 years, light-emitting diodes have been successfully employed wherever small amounts of light are needed. Present-day applications include car indicators, reversing and brake lights. However, the efficiency and luminosity of LEDs have never ...
Article - News Staff - Jan 4 2008 - 11:13am
- Unleashing A Magnetic Tornado For Superconductivity
An international research team has discovered that a magnetic field can interact with the electrons in a superconductor in ways never before observed. Andrea D. Bianchi, the lead researcher from the Université de Montréal, explains in the January 11 editio ...
Article - News Staff - Jan 11 2008 - 1:05pm
- Is Hydrogen Absorption An Empirical Test Of String Theory?
Cosmologists at the University of Illinois say ancient light absorbed by neutral hydrogen atoms could be used to test certain predictions of string theory- but they'll need a gigantic array of radio telescopes to do it, somewhere in the neighborhood o ...
Article - News Staff - Jan 28 2008 - 4:57pm
- Dark Energy: Is The Theory Of Gravity Wrong?
Ten years ago, astronomers made the stunning discovery that the universe is expanding at a faster pace today than it did in the past. “Explaining why the expansion of the Universe is currently accelerating is certainly the most fascinating question in mode ...
Article - News Staff - Jan 30 2008 - 2:26pm
- Optical Atomic Clocks Use Light Oscillation To Keep Precise Time
Optical clocks might become the atomic clocks of the future. Their "pendulum", i.e. the regular oscillation process which each clock needs, is an oscillation in the range of the visible light. As its frequency is higher than that of the microwave ...
Article - News Staff - Feb 5 2008 - 8:15pm
- How Crystal Changes From Insulator To Conductor
Squeeze a crystal of manganese oxide hard enough, and it changes from an electrical insulator to a conductive metal. In a Nature Materials report, researchers use computational modeling to show why this happens. The results represent an advance in computer ...
Article - News Staff - Feb 5 2008 - 5:20pm
- Stochastic Cooling And Racing Ahead Of The Speed Of Light
When something is moving close to the speed of light, the fastest anything can move, sending ahead information in time to make mid-path flight corrections sounds impossible. Not quite, say physicists at the Relativistic Heavy Ion Collider (RHIC), a particl ...
Article - News Staff - Feb 6 2008 - 10:38am
- Listening For Black Holes
Black holes are massive gravitational fields in the universe that result from the collapse of giant stars. Because black holes absorb light, they cannot be studied using telescopes or other instruments that rely on light waves. However, scientists believe ...
Article - News Staff - Feb 8 2008 - 10:21pm
- The Mysteries Of Sandcastles Unlocked
Anyone trying to build sandcastles on the beach will need some degree of skill and imagination, but not an instruction manual. The water content is actually relatively unimportant to the mechanical properties of the sand. This observation, which is borne o ...
Article - News Staff - Feb 17 2008 - 4:30am