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rcastro0 writes:
What looks like a CPU's heat sink worn around the wrist apparently may be able to make you feel cool even while it is hot — or warm while it is cold. As Wired reports, this termoelectric device explores human physiology and how we perceive temperature to fool our body and make us comfortable. The device is called Wristify, and a prototype has been developed: Mashable has a video. Can this be the most efficient alternative to air conditioning ever?
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rcastro0 writes:
Gizmag reports on the Sherpa, an interesting helicopter design at this year's Paris Air Show. As the article explains "Rather than driving the rotors directly, the Sherpa's engine instead powers a compressor with an air intake at the rear of the helicopter." There's no tail rotor. This approach is supposed to be more efficient, more reliable and more affordable than the traditional. A one-fifth scale model was shown to fly. Sagita, the 2008 startup behind the project, has yet to build a full scale prototype. They plan to sell a Sherpa two-seater for around US$ 200k in 3 years.
