Magnetic levitation. Magnetic levitation, maglev, or magnetic suspension is a method by which an object is suspended with no support other than magnetic fields.
Magnetic pressure is used to counteract the effects of the gravitational and any other accelerations. Earnshaw's theorem proves that using only ferromagnetic or paramagnetic materials it is impossible to stably levitate against gravity; however, servomechanisms, the use of diamagnetic materials, superconduction, or systems involving eddy currents allow to achieve that. In some cases the lifting force is provided by magnetic levitation, but there is a mechanical support bearing little load that provides stability. This is termed pseudo-levitation. Japanese Scientists Create Touchable Holograms // Current. To Our Faithful Current.com Users: Current's run has ended after eight exciting years on air and online.
The Current TV staff has appreciated your interest, support, participation and unflagging loyalty over the years. Your contributions helped make Current.com a vibrant place for discussing thousands of interesting stories, and your continued viewership motivated us to keep innovating and find new ways to reflect the voice of the people. We now welcome the on-air and digital presence of Al Jazeera America, a new news network committed to reporting on and investigating real stories affecting the lives of everyday Americans in every corner of the country. Predator takes visual object tracking to new heights – Computer Chips & Hardware Technology.
Cameras have slowly made their way into the portable gadgets we all carry around with us and not having a camera in a new device is viewed as a missing feature.
It’s got to the point now where the latest smartphones even have two cameras so as to make for better video chat. But while the prevalence and quality of the cameras has gone up, the software still lags behind in terms of being able to identify and track objects in any real-time or captured footage. That is about to change due to the work of Czech student Zdeneki Kalai. Working on his Ph.D at the University of Surrey he has created a new visual object tracking algorithm called Predator that blows away everything that has come before it in the consumer-space at least. This algorithm not only tracks, it learns the more it gets used.
Gadgets & TopTech
Dennis Hong: My seven species of robot. Aggressive Maneuvers for Autonomous Quadrotor Flight. High-Speed Robot Hand. The Gadget Guide.