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Showing posts with label scitech. Show all posts
Showing posts with label scitech. Show all posts

Tuesday, July 20, 2010

One Step Closer to a Death Ray!!!

Laser cannon that can take down an airplane unveiled

Finally, we are living in a world where gigantic lasers can shoot down planes. It's been a sci-fi dream for ages, but now, Raytheon has a functioning anti-aircraft laser that can actually take planes out of the sky.

Dubbed the Laser Close-In Weapon System, Raytheon recently unveiled the new laser at an airshow in England. Using a 50 kilowatt beam, it's been tested against unmanned aircraft with great success. You wouldn't want to be targeted by this thing, that's for sure.

It's currently being incorporated into the Navy's anti-missile defense system by the company, so it's likely that we'll start seeing laser-based warfare in the very near future.

Via Fast Company


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Sunday, August 16, 2009

New flat flexible speakers might even help you catch planes & trains


A groundbreaking new loudspeaker, less than 0.25mm thick, has been developed by University of Warwick engineers, it's flat, flexible, could be hung on a wall like a picture, and its particular method of sound generation could make public announcements in places like passenger terminals clearer, crisper, and easier to hear. Lightweight and inexpensive to manufacture, the speakers are slim and flexible: they could be concealed inside ceiling tiles or car interiors, or printed with a design and hung on the wall like a picture.

Pioneered by University of Warwick spin-out company, Warwick Audio Technologies' the 'Flat, Flexible Loudspeaker' (FFL) is ideal for public spaces where it delivers planar directional sound waves, which project further than sound from conventional speakers.

Steve Couchman, CEO of Warwick Audio Technologies, believes it could entirely replace the speakers currently used in homes and in cars, as well as in public address systems used in passenger terminals and shopping centres.

He says: "We believe this is a truly innovative technology. Its size and flexibility means it can be used in all sorts of areas where space is at a premium. Audio visual companies are investigating its use as point of sale posters for smart audio messaging and car manufacturers are particularly interested in it for its light weight and thinness, which means it can be incorporated into the headlining of cars, rather than lower down in the interior."

All speakers work by converting an electric signal into sound. Usually, the signal is used to generate a varying magnetic field, which in turn vibrates a mechanical cone, so producing the sound.
Warwick Audio Technology's FFL technology is a carefully designed assembly of thin, conducting and insulating, materials resulting in the development of a flexible laminate, which when excited by an electrical signal will vibrate and produce sound.

The speaker laminate operates as a perfect piston resonator. The entire diaphragm therefore radiates in phase, forming an area source. The wave front emitted by the vibrating surface is phase coherent, producing a plane wave with very high directivity and very accurate sound imaging.

"Another great application would be in PA systems for public spaces," says Steve. "The sound produced by FFLs can be directed straight at its intended audience. The sound volume and quality does not deteriorate as it does in conventional speakers, which means that public announcements in passenger terminals, for example, could be clearer, crisper, and easier to hear."



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Tuesday, August 11, 2009

Fountain of Youth in a Wine Rx?


iStock

60 Minutes January 25, 2009

The Studies

“Resveratrol Improves Health and Survival of Mice on a High-Calorie Diet,” Nature, 2009

The Hype

Morley Safer interviewed the founders of Sirtris, a company planning a pill form of resveratrol, a compound found in red wine. He ended up doing a lot of cheerleading. Among the untested claims the show let slide: that a pill could forestall diseases in our 50s, 60s and 70s, and that it works using the body’s natural defenses against Alzheimer’s, cancer and diabetes.

The Subtler Truth

Though it’s often a paragon of journalistic rigor, 60 Minutes has a record of falling short on health issues. Its breathless 13-minute coverage of resveratrol, which has been tested mostly on mice and yeast, presented no opposing view and was tempered only by a single (and damning) statistic: “9 out of 10 drugs that look good in mice ultimately fail in human trials.” Says Gary Schwitzer, a professor at the University of Minnesota and founder of journalism watchdog site HealthNewsReview.org, “The job they’ve done on health and medical-science stories makes me watch the rest of their stories with greater scrutiny. Sometimes journalists become enamored and fawning about the progress of science. They check their skepticism at the door.”

The Bottom Line

There seems to be some sort of connection between heart health and red wine, but it’s not clear that resveratrol is why. And considering that plenty of animal tests don’t credit resveratrol, one has to wonder at all the puffery. When it comes to surprising health claims, even the much-vaunted 60 Minutes needs to be viewed with a critical eye.

Conclusion

I think that even if it doesn't do anything maybe if I believe in it I will have a placebo affect. Hey its worth a try. If you want to buy the supplement they have it at GNC or Amazon and its not expensive.



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