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Japanese scientists make breakthrough in space-based laser power
The Japan Aerospace Exploration Agency (JAXA) and Osaka University have been working together to develop a device which converts sunlight into laser-light with four times the efficiency of previous attempts. According to a report out of Tokyo, the team is working on Space-based solar power systems which can collect sunlight in space and convert it into laser light, which is then transmitted to Earth and used for electricity... or to power a massive Death-Ray. The project works by storing sunlight-based energy in plate made from a sintered powder of metals like chromium and neodymium. When weak laser light is shined onto the plate, the stored energy is transferred to the laser where its strength is amplified by a factor of four. In one test, a 0.5-watt laser was amplified to 180-watts by the plates. Scientists have thus far been able to garner 40-percent of the solar energy produced, and they hope to have a system ready for satellite mounting by the not-too-distant year 2030. Huzzah! [Warning: read link requires subscription]
Osaka University develops teeth-controlled iPod interface
Just in case you weren't satisfied with the smorgasbord of options you already had when looking to control your iPod alternatively, researchers at Osaka University are hoping to shut you up. Thanks to new head gear that "uses infrared sensors and a microcomputer," individuals would be able to "operate music players by clenching their teeth." Essentially, the system "receives a command when the user clenches his or her teeth for about one second," which means that you can still chew gum and whatnot without getting it all confused. In the future, the team hopes to implement the technology into more devices, allowing folks to make funny faces to flip to the next slide in a presentation, answer a phone call, or even direct a wheelchair.
Researchers using waves to write on water
Liquid-based displays are nothing new -- in a vertical orientation, at least -- but apparently it's a lot more difficult to coax a standing pool of water into forming recognizable shapes and characters. In fact, before coming up with their current design, researchers at Japan's Akishima Laboratories were only able to get poorly-formed letters to pop up once every 15 minutes in their first stab at using waves to "print" on the surface of a specially-built pool. Their second attempt, however -- developed with Professor Shigeru Naito of Osaka University -- addresses both major flaws by using formulas known as Bessel functions to cut the processing time down to between 15 and 30 seconds and form characters with straight lines. The 30-centimeter deep, kiddie pool-sized device employs 50 generators operating in unison to produce cylindrical waves that behave like pixels, giving it the ability to display the entire roman alphabet as well as a number of kanji characters. Eventually this technology could be combined with music and lighting effects to create multimedia attractions at hotels or theme parks, but until they can speed up the letter formation even more (and maybe toss in some video), we don't see any real practical applications here. Readers?[Via Pink Tentacle]
