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Researchers at the Massachusetts Institute of Technology designed a low-cost prosthetic knee that mimics normal walking motion. The MIT team's prototype generates a torque profile similar to that of able-bodied knees, using only simple mechanical elements like springs and dampers. The team is testing...

A strong, lightweight metal foam created by a North Carolina State University researcher absorbs the energy of high-impact collisions and effectively blocks X-rays, gamma rays, and neutron radiation. The device offers new shielding possibilities for use in CT scanners.

A new technology developed at Duke University uses metamaterials and compressive sensing to determine the direction of a sound and extract it from the surrounding background noise. Once miniaturized, the device could have applications in hearing aids, cochlear implants, and ultrasound medical sensors.

An implant built by Stanford University engineers produces light to stimulate nerves of the brain, spinal cord, or limbs in mice. The technology is powered wirelessly, using the mouse's own body to transfer energy. Scientists will use the new optogenetic nerve stimulation methods to investigate a...

Recently, an online discussion board broached the subject of FDA approval for a diagnostic app that might be able to predict when a patient’s condition would relapse. The question postulated whether there was a way to circumvent FDA approval by launching the app in another country and making it available online. And, if...