The IEEE Spectrum Online magazine has a detailed article
about the state of prosthetics for amputees. The perception is that the state of the art for replacement limbs has advanced greatly, but the reality is somewhat different. The article's author lost his arm in Iraq and is now working on development of prosthetic limbs as part of a free software (and hardware) project. "The MyOpen project on the Open Prosthetics site is working on ways to create a product that can serve both a niche and a mass market. MyOpen, an open-hardware signal-processing board that will be compatible with APLs arm, will also serve as a universal controller for video games. We want creative people to get their hands on this device and push it to the limits. We want this device to enhance the experience of playing video games, and in doing so, push prosthetics innovation into the 21st century.
" (Thanks to Evgeny Stambulchik)
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