Researchers from the National Institute of Standards and Technology (NIST) and the National Renewable Energy Laboratory (NREL) have reported a way to measure the amount of laser light needed to shift the electrons in a type of quantum dot between two discrete states—a low energy, ground state and a higher energy, excited state. Quantum dots may be able to serve as the ones and zeros in a quantum computer, once physicists have the ability to turn them "on" and "off". NIST's and NREL's new technique measures the dipole moment directly by enclosing the dots in a cavity, a dimming laser light pulse passing over them repeatedly. This in turn helps measure the dipole moment, indicating how easy the dots are to excite. For details, go to http://nist.gov.
Independent science safety company Underwriters Laboratories is providing new guidance for manufacturers about how to follow the latest IEC standards for implementing safety features in programmable logic controllers.
Automakers are adding greater digital capabilities to their design and engineering activities to promote collaboration among staff and suppliers, input consumer feedback, shorten product development cycles, and meet evolving end-use needs.
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