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Twisted Radio Beams Could Untangle the Airwaves 183

Urchin writes "The radio frequency spectrum available for wireless communication is becoming increasingly crowded thanks to new wireless technology. A solution to the shrinking space might be to put a spin on radio beams during their transmission, to produce a twisted beam, according to Swedish physicists. In theory, huge amounts of data could be sent in the pitch of the twist, which is distinct from the amplitude and frequency of radio waves — the features used at the moment to send information."

Comment Re:Motorcycle (Score 1) 887

Absolutely - I ride a "push bike" to work for at least half of my commutes. And for those of us on bicycles, the "local smog" element of the motorcycle is disturbing, since we are breathing in everything they are putting out. When even a fairly modern motorcycle or scooter goes by, the amount of pollutants coming out of the tailpipe is clearly more than a car, based upon the nose & lung test.

Comment Re:Motorcycle (Score 2, Interesting) 887

It's a shame that his motorcycle most likely puts out more emissions than that SUV.

"Are motorcycles a less-polluting alternative to cars? No, in fact, motorcycles produce more harmful emissions per mile than a car or even a large SUV. The current federal motorcycle standard for hydrocarbon emissions is about 90 times the hydrocarbon standard for today's passenger cars."

From: http://www.epa.gov/OMS/regs/roadbike/420f03046.pdf


Volvo Introduces a Collision-Proof Car 743

carazoo.com sends along a story on Volvo's upcoming crash-proof car. The company will introduce a concept car based on the S60 this month at the Detroit Auto Show, looking ahead a few years to the goal that by 2020 "no one should be killed or injured in a Volvo car." The concept car will have forward-looking radar as a proximity sensor, and the ability to brake if a collision is imminent. When the car senses a collision, a light flashes on the windscreen display along with an audible warning. If the driver doesn't act, the car will brake automatically.

Comment Re:Put your money where your mouth is (Score 1) 376

I have searched and searched for a DVD recorder that has HDMI output that provides the true HD (720/1080) signal to the TV. Every one I have seen first down converts to 480, and then provides that signal out. If there is one out there that doesn't do this, can someone please post a link? Thanks!

Submission Protecting IM from the NSA, a Canadian's view 3

holden writes: "Ian Goldberg, leading security researcher, professor at the university of waterloo, cypherpunk and co-creator of the Off-the-Record Messaging (OTR) protocol recently gave a talk on protecting your IM conversations. He discusses OTR and its importance in today's world with warrant-less wire tapping and all that bad stuff. With OTR users benefit from being able to have truly private conversations over IM, by using encryption to obtain authentication, deniability, and perfect forward secrecy, while working within their existing IM infrastructure. With the recent NSA wiretapping activities and increasing Big Brother presence, security and OTR are increasingly important. An avi of the talk is available by http as well as by bittorrent and a bunch of other formats."

Submission LCD and Plasma TVs Found Highly Reliable->

Ant writes: "Yahoo! News report that liquid crystal displa (LCD) and plasma televisions (TVs) require few repairs during the first three years of use, and buyers would be wasting their money during the holiday shopping season if they bought extended warranties on the highly reliable devices, Consumer Reports found in a study released Friday. The consumer review firm's Annual Product Reliability Survey, featured in the upcoming December 2007 issue, found that the flat panel sets overall had a 3% repair rate. Rear-projection TVs, on the other hand, were found to be much more repair prone than its two rivals... Seen on Gizmodo and Blue's News."
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