Roller coaster superconductivity discoveredAugust 18, 2010
This graphic shows the crystal structure of three-layered bismuth oxide. Credit: Xiao-Jia ChenSuperconductors are more than 150 times more efficient at carrying electricity than copper wires. However, to attain the superconducting state, these materials have to be cooled below an extremely low, so-called transition temperature, at which point normal electrical resistance disappears. Developing superconductors with higher transition temperatures is one of physics' greatest quests.
Credit Card with a Computer Inside
A smarter credit card could mean new security features and other functionality.By Tom Simonite
A programmable credit card can display useful information, offer added security features, and even act as several different cards by rewriting its own magnetic strip.Two types of programmable credit cards were unveiled this week at the DEMO conference in Santa Clara, California, by Dynamics, a startup based in Pittsburgh that's been developing the technology in stealth mode for three years. The company raised $5.7 million of funding last year.
Aumentando a capacidade das Baterias em Lítio:
Doubling Lithium-Ion Battery Storage
Portable electronics could run 40 percent longer using a new type of anode.By Katherine Bourzac
Battery startup Amprius says it has developed batteries capable of storing twice as much energy as anything on the market today, thanks to nanostructured silicon electrodes. The company says it is partnering with several as-yet unnamed major consumer electronics manufacturers to bring the batteries to market by early 2012. The batteries will allow portable electronics to run 40 percent longer without a recharge.
Make Clothes Out of a Can With Spray-On Fabric