The transistor of the future may not rely on decreased size, but on a radical change in operation. The device: a quantum mechanical transistor created at Sandia National Laboratories. The transistor corresponds to turning on a light bulb--without closing a switch. With the device, electrons "tunnel" from path to path through a barrier that, according to classical physics, is impenetrable. The process resembles the way cars use a tunnel to reach a location, without having to drive over an impossibly high summit. "We have demonstrated real circuits that work and are easily fabricated," reports Jerry Simmons, leader of the Sandia development team. In the device, two gallium arsenide layers, each only 150 angstroms thick, are separated by a 125-angstrom, aluminum-gallium arsenide barrier. The tiny thickness of the barrier causes the electrons to behave like waves, which can poke into the barrier. The device may run at a trillion operations a second, roughly 10 times the speed of the fastest transistor circuits currently in use. Actual speed has not yet been measured, says Simmons, because it is "not easy to measure such high speeds, which are near the limits of measurements with conventional equipment." E-mail jsimmon@sandia..
We looked at a number of sources to determine this year's greenest cars, from KBB to automotive trade magazines to environmental organizations. These 14 cars emerged as being great at either stretching fuel or reducing carbon footprint.
Healthcare might seem to be an unlikely target application for the Internet of Things technology, but recent developments show small ways that big-data is going to make an impact on patient care moving into the future.
As energy efficiency becomes more and more a concern for makers of electronics devices, researchers are coming up with new ways to harvest energy from sound vibration, footsteps, and even electromagnetic fields in the air.
A quick look into the merger of two powerhouse 3D printing OEMs and the new leader in rapid prototyping solutions, Stratasys. The industrial revolution is now led by 3D printing and engineers are given the opportunity to fully maximize their design capabilities, reduce their time-to-market and functionally test prototypes cheaper, faster and easier. Bruce Bradshaw, Director of Marketing in North America, will explore the large product offering and variety of materials that will help CAD designers articulate their product design with actual, physical prototypes. This broadcast will dive deep into technical information including application specific stories from real world customers and their experiences with 3D printing. 3D Printing is