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segunda-feira, 5 de julho de 2010

Notícias do mundo da tecnologia

Novos Aviões Supersónicos, sem o Estrondo característico do Concorde: 
NASA: Fixing what Yeager broke 
By Rebecca Boyle

Posted 07.01.2010 at 3:32 pm
A Boomless Sonic Jet Lockheed Martin Corp. designed this supersonic aircraft, which aims to reduce the potentially damaging sonic booms that prevented the Concorde from being flown over land in the U.S. NASA

True to its aeronautic roots, NASA is evaluating a new generation of supersonic airplane designs to see whether they can reduce sonic-boom levels.

Boeing and Lockheed Martin have submitted futuristic concepts that look similar to the Concorde, but aim to muffle the annoying and potentially damaging sonic boom problem.

Airplanes flying faster than sound create a cone of pressurized air molecules that extends to the ground, as NASA explains. The shockwave is noisy, but it can also cause structural damage, and in the Concorde's case, the U.S. wasn't having it. The supersonic jet never flew over land in the U.S.; sonic flights are restricted to military and research aircraft.

The new designs could make over-land travel possible, however, by using special engine or tail designs that reduce the shockwave effect. 
Boeing Boomless Jet: Boeing's concept places the engines on top of the wings, adding an extra sound barrier.  NASA via Wired


...E para breve, o primeiro ROBOT na Lua:

Friday, July 02, 2010

Humanoid Robots on the Moon in 1,000 Days?

A curious NASA mission, known as Project M, could send a robot to the moon, soon.
By Brittany Sauser

Despite President Obama's new budget proposal to scrap moon-landing plans NASA is pushing forward with a new lunar-based mission, dubbed Project M.

According to the agency, "the proposition is simple: land an operational humanoid robot on the moon in 1,000 days."

NASA made a big splash earlier this year when it unveiled a humanoid robot called Robonaut2 in partnership with GM. At the time, Rob Ambrose, chief of the Software, Robotics and Simulation Division at NASA, told Technology Review that the agency wanted to use the robot for a number of different missions, starting with visits the International Space Station. The proposed Project M, which oddly hasn't been discussed much by NASA officials, seems to be part of this plan. The agency is also testing a prototype lunar lander to launch the robot at Armadillo Aerospace located near Dallas, TX. NasaWatch.com reports that the agency plans to land something on the moon in 2013.
 
http://www.technologyreview.com/blog/deltav/25412/

...E para ùltimo, esperança para os Diabéticos, um Pâncreas artificial, criado dentro do Paciente:

Building a Substitute Pancreas for Diabetics

A startup hopes implanted insulin-producing cells will free diabetics from insulin injections.
By Emily Singer
Implants containing specially wrapped insulin-producing cells derived from embryonic stem cells can regulate blood sugar in mice for several months, according to research presented this month at the International Society for Stem Cell Research conference in San Francisco. San Diego-based ViaCyte (formerly Novocell), which is developing the implant as a treatment for type 1 diabetes, is now beginning the safety testing required for approval from the U.S. Food and Drug Administration before human testing can start.

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