Semiconductor pressure sensors have limitations when used in hot environments. One of the most debilitating limitations is their susceptibility to electromagnetic interference. A new self-calibrated interfermetric intensity-based (SCIIB) sensor developed at the Virginia Tech Photonic Laboratory (VTPI) is immune to electromagnetic interference. It also resists chemical corrosion and withstands temperature above 482C—the temperature limit of sensors used in jet engines, power plants, and other hot environments. Sensors placed in a jet engine are expected to monitor sound pressure waves and warn the pilot about potential engine problems. The sensors are made using the fibers of a single crystal sapphire. The U.S. Department of Energy awarded VTPI's partner, Oak Ridge National Laboratory, with funding to collaborate on the project and commercialize the sensors. Oak Ridge National Lab has a sapphire material processing and fabrication facility. For information call (540) 231-4363.
What makes this movie stand out from the typical high school sports story is that the teenagers are undocumented immigrants, and the big game is a NASA-sponsored marine robotics competition. Like many other Hollywood movies, however, Spare Parts only tells part of the story. What the film shows -- and doesn’t show -- raises important issues affecting STEM education in the US.
Instead of sifting through huge amounts of technical data looking for answers to assembly problems, engineers can now benefit from 3M's new initiative -- 3M Assembly Solutions. The company has organized its wealth of adhesive and tape solutions into six typical application areas, making it easier to find the best products to solve their real-world assembly and bonding problems.
Load dump occurs when a discharged battery is disconnected while the alternator is generating current and other loads remain on the alternator circuit. If left alone, the electrical spikes and transients will be transmitted along the power line, leading to malfunctions in individual electronics/sensors or permanent damage to the vehicle’s electronic system. Bottom line: An uncontrolled load dump threatens the overall safety and reliability of the vehicle.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.