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sexta-feira, 18 de fevereiro de 2011

Novidades

400% mais Energia Solar?
É bom!

HyperSolar concentrator could boost solar cell output by 400 percent

By Ben Coxworth

14:24 February 17, 2011

Solar cells are the most expensive part of a solar panel, so it would follow that if panels could produce the same amount of electricity with less cells, then their prices would come down. In order for panels to be able to do so using existing cell technology, however, they would need to get more light to the fewer cells that they still had. Mounting the panels on the end of vertical poles to get them closer to the sun is one possible approach, that might work in the town of Bedrock or on Gilligan’s Island. A better idea, though, is to apply a clear layer of solar concentrators to the surface of a panel – and that’s just what HyperSolar intends to do.



Importante para todas as mulheres...

Can testosterone improve cognition in older women?

By Mary Panjari

21:01 February 17, 2011

For women, the onset of midlife brings with it an array of distressing symptoms related to changes in hormone levels. The risk of dementia increases with age – particularly after the mid-60s – memory loss is a frequent complaint and quality of life is compromised as a result. Using a novel "patchless" patch method of drug delivery, researchers at the Women’s Health Research Program Monash University, Australia, have been investigating whether restoring testosterone levels in older women to those of younger women will improve brain function and ultimately protect against dementia.
http://www.gizmag.com/testosterone-improve-cognition-older-women-drug-delivery/17916/


Como me estou a parecer com os ratos à esquerda da imagem, isto interessa-me...
Researchers stumble on potential new treatment for hair loss


By Darren Quick

21:29 February 17, 2011


While conducting research into brain-gut interactions, a team led by researchers from UCLA and the Veterans Administration may have inadvertently stumbled across a new treatment for hair loss. During an investigation into the affect of stress on gastrointestinal function, the researchers believe they may have found a chemical compound that induces hair growth by blocking a stress-related hormone associated with hair loss.
http://www.gizmag.com/new-treatment-hair-loss/17919/



Um beija-flor robótico que voa por todo o lado!|


AeroVironment, the California-based company behind the largest, highest and longest flying unmanned aircraft system (UAS), the Global Observer, has now achieved a remarkable technical milestone with a much smaller aircraft. With its "Nano Hummingbird" the company has for the first time achieved controlled precision hovering and fast-forward flight of a two-wing, flapping wing aircraft that carries its own energy source and relies only on its flapping wings for propulsion and control.

The hand-made final concept demonstrator Nano Hummingbird has a wingspan of 16 cm (6.5 in) and weighs just 19 g (2/3 oz), which is less than the weight of a AA battery. Into this tiny and lightweight package the AeroVironment UAS team has managed to cram all the systems required for flight, including batteries, motors, communications systems and even a video camera.

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