cnn.com: By Mike Steere

Would you still watch your favorite television program if you had to cycle for an hour before you could view it?

Couch potatoes will be horrified, but fresh advances in human-powered technology — where users power appliances through their own motion — could one day see a ‘workout-to-watch’ scenario become reality.

Human power is rapidly gaining in popularity worldwide as businesses seek ‘greener’ methods of operating. [ read more ]

cnn.com: By Stephanie Busari

From sensors in workout gear that monitor sweating while you run at the gym, to underwear that aims to detect cancer cells, the contents of our wardrobes have been quietly undergoing a revolution. Over the past decade, there has been a rise in the number of ways that technology is being incorporated into items of our clothing.

Trials of smart clothes that can repel insects and mask nasty odours such as cigarette smoke have proved successful and are already being marketed.
[ read more ]

technologyreview.com: By Brittany Sauser

A large-scale tidal-power unit has started up in Northern Ireland.

The world’s first commercial tidal-power system has been connected to the National Grid in Northern Ireland. Built by the British tidal-energy company Marine Current Technologies (MCT), the 1.2-megawatt system consists of two submerged turbines that are harvesting energy from Strangford Lough’s tidal currents. The company expects that once the system, called SeaGen, is fully operational, it will be able to provide electricity to approximately one thousand homes.

The system is currently being tested and has briefly generated 150 kilowatts of power into the grid. But it has also damaged one of its rotors due to a failure in the control system when the rotor began turning too fast. Although the problem was a minor setback, the unit is not expected to start running continuously and at full capacity until November, says Peter Fraenkel, the technical director at MCT. [ read more ]

technologyreview.com: By Prachi Patel-Predd

Materials that change temperature in response to electric fields could keep computers–and kitchen fridges–cool.

Thin films of a new polymer developed at Penn State change temperature in response to changing electric fields. The Penn State researchers, who reported the new material in Science last week, say that it could lead to new technologies for cooling computer chips and to environmentally friendly refrigerators.

Changing the electric field rearranges the polymer’s atoms, changing its temperature; this is called the electrocaloric effect. In a cooling device, a voltage would be applied to the material, which would then be brought in contact with whatever it’s intended to cool. The material would heat up, passing its energy to a heat sink or releasing it into the atmosphere. Reducing the electric field would bring the polymer back to a low temperature so that it could be reused. [ read more ]

technologyreview.com: By Alexandra M. Goho

Frances Arnold is designing better enzymes for making biofuels from cellulose.

In December, President Bush signed the Energy Independence and Security Act of 2007, which calls for U.S. production of renewable fuels to reach 36 billion gallons a year–nearly five times current levels–by 2022. Of that total, cellulosic biofuels derived from sources such as agricultural waste, wood chips, and prairie grasses are supposed to account for 16 billion gallons. If the mandates are met, gasoline consumption should decline significantly, reducing both greenhouse-gas emissions and imports of foreign oil. [ read more ]

technologyreview.com: By Jennifer Chu

Physicist Marin Soljacic is working toward a world of wireless electricity.

In the late 19th century, the realization that electricity could be coaxed to light up a bulb prompted a mad dash to determine the best way to distribute it. At the head of the pack was inventor Nikola Tesla, who had a grand scheme to beam elec­tricity around the world. Having difficulty imagining a vast infrastructure of wires extending into every city, building, and room, Tesla figured that wireless was the way to go. He drew up plans for a tower, about 57 meters tall, that he claimed would transmit power to points kilometers away, and even started to build one on Long Island. Though his team did some tests, funding ran out before the tower was completed. The promise of airborne power faded rapidly as the industrial world proved willing to wire up. [ read more ]

technologyreview.com: By Robert F. Service

Alex Zettl’s tiny radios, built from nanotubes, could improve everything from cell phones to medical diagnostics.

If you own a sleek iPod Nano, you’ve got nothing on Alex Zettl. The physicist at the University of California, Berkeley, and his colleagues have come up with a nanoscale radio, in which the key circuitry consists of a single carbon nanotube.

Any wireless device, from cell phones to environmental sensors, could benefit from nanoradios. Smaller electronic component­s, such as tuners, would reduce power consumption and extend battery life. Nanoradios could also steer wireless communications into entirely new realms, including tiny devices that navigate the bloodstream to release drugs on command. [ read more ]

portfolio.com: by Dave Demerjian

A jet engine developed by Pratt & Whitney could revolutionize the aviation industry.

One of the biggest names in aviation has developed a jet engine that is more efficient, less polluting and cheaper to use than almost everything else in the sky, and it could revolutionize an industry facing skyrocketing fuel prices and mounting pressure to clean up its act.

Pratt & Whitney has spent the better part of two decades developing the geared turbofan engine that burns 12 to 15 percent less fuel than other jet engines and cuts carbon dioxide emissions by 1,500 tons per plane per year. It’s being called one of the most exciting developments commercial aviation has seen in years, and it was a hot topic at the Eco-Aviation Conference, where the aviation industry spent two days charting the course to a greener future. [ read more ]

wired.com: By Chuck Squatriglia

All new cars will have some degree of hybridization by 2020, by which point battery technology will be ubiquitous and vehicles will communicate with one another and the road to make driving safer and easier.

That vision of the future is laid out in “Automotive 2020: Clarity Beyond the Chaos,” (.pdf) by the IBM Institute for Business Value. The report, based on interviews with 125 auto industry executives in 15 countries, says the industry is on the cusp of revolutionary changes that will see environmental sustainability and technological innovation become top priorities as automakers respond to consumer demands for more efficient cars that don’t sacrifice performance, comfort or reliability. [ read more ]

cnn.com: By Michael V. Copeland

Building the world’s first electric supercar was never going to be easy - even without the hubris, infighting, and mismanagement that nearly sent Tesla spinning off the road.

For Martin Eberhard, there were many obstacles on the path to building the ultimate electric sports car. There was the scientific challenge of creating a lithium ion battery pack stable enough to power a 2,650-pound vehicle. There was the belief that Americans would stick with their gas-guzzlers, no matter what the price of oil. And there was, of course, the considerable resistance in the venture capital community to funding heavy industry.

But for Eberhard, the ultimate indignity came in early June of this year. Just days before he was finally supposed to take possession of his Tesla Roadster, a gray beauty with orange racing stripes that he had devoted the past five years of his life to building, a technician who had been driving it on the 101 freeway relayed some bad news.

[ read more ]