A hybrid-lighting fixture based on simulating a typical fluorescent-light fixture containing four 40W tubes has two of the tubes replaced by diffusers. The hollow diffusers have their inner surface covered with prism-like bumps that refract the light traveling down the tube into the wall, illuminating the room.
Optical light guides route sunlight into the diffusers. Illumination sensors in the fixture monitor room light level. In place of the conventional ballast is an electronics package with an active solid-state controller. This varies current and voltage to the fluorescent tubes to produce a constant total-light level to the sensor setting. If the fluorescent tubes have sufficient capacity to illuminate the room fully when no sunlight is available, the light level will always be the same to the occupant.
Inforbix is leveraging its CAD and product data access technology to power up a free iPad app that lets mobile users search and access engineering data.
Unlike his friends in engineering programs, blogger Jon Titus had little need for calculus except in a few of his college physical-chemistry labs and classes.
In the wake of the Chevy Volt fire investigations, sales are down, and General Motors' (GM) CEO Dan Akerson is blaming the downturn on a spate of bad publicity.
Thanks to embedded electronics, medical devices are getting smaller and smarter than ever. Pacemakers and implantable defibrillators are now able to call physicians. MRIs, CT scanners, and ultrasound machines are gaining mobility. And the venerable Band-Aid may soon be able to detect illnesses ranging from fevers to heart arrhythmias. On February 21, join Design News senior editor Charles Murray for a wide-ranging discussion, "Embedded Angles for Medical Products," which will explore the latest developments in medical electronics. The discussion will examine advances in medical device technology and offer an inside look at the embedded electronics behind it.
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