Engineers at Johns Hopkins University's Department of Electrical and Computer Engineering are developing a new way of manufacturing microchips. Unlike the microchips in most computers that use thin slices of silicon as the semiconducting material, the new chip design uses layers of silicon on slices of synthetic sapphire. The sapphire is an insulator. And it allows light to pass through it. Andreas G. Andreou is a professor at the lab where the research is done. "We've developed a very fast way of getting data on and off a chip without using wire," says Andreou. His team uses light beams in place of metal wire. Electrical signals are transformed into light pulses and then beamed through the transparent sapphire substrate via a laser. At its destination, the light enters the high-speed optical receiver circuit that transforms the stream of photons into a stream of electrons that continue their journey through wiring connected to other computer components. Using optical signals, Andreou believes that a signal could move 100 times faster than it does along a metal wire. The opto-electric interface also requires less power because the substrate is an insulating material, not a semiconducting material. Thus, it reduces the power dissipation that commonly occurs in microprocessors when signals travel through wires that have capacitance. "Without peristaltic capacitance, it's much faster to send signals at the speed of light," says Andreou. For more information, go to http://www.jhu.edu.
A middle school team from Rochester, Mich., has again nabbed the grand prize in the annual international Future City Competition, which drew students from 37 regions of the United States, as well as from England and China.
The word “smart” is becoming the dumbest word around. It has been applied to almost every device and system in our homes. In addition to smartphones and smart meters, we now hear about smart clothing and smart shoes, smart lights, smart homes, smart buildings, and every trendy city today has its smart city project. Just because it has a computer inside and is connected to the Web, does not mean it is smart.
Are you being paid enough? Do you want a better job? According to a recent survey Manpower released just before Engineers Week, employers and engineers don't see eye-to-eye about the state of US engineers' skills and experience.
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