How do you weigh yourself when there's no gravity keeping you down? Well, you can calculate your mass by sitting on an oscillating spring and comparing its standing frequency to your riding frequency (NASA's current method), or you could rig up a Kinect sensor to tell you when you're getting fat. Carmelo Velardo, a Eurocom computer scientist in Alphes-Maritimes, France, is developing the latter option. Working with colleagues at the Italian Institute of Technology's Center for Human Space Robotics, Velardo paired the Kinect sensor's 3D modeling
