The next time your doctor says he can look right through you, he may be speaking literally and not just figuratively, especially if your doctor is George Stetten, a biomedical engineer at the University of Pittsburgh. Although doctors sometimes use ultrasound for looking inside patients, current technology requires that the doctors look away from the patient at an ultrasound display. Stetten says the result is a displaced sense of hand-eye coordination. "The difficulty is developing a natural way to visually merge ultrasound images with the real world," says Stetten. His "sonic flashlight" uses a process called tomographic reflection. By strategically positioning an ultrasound scanner and the ultrasound display on opposite sides of a half-silvered translucent mirror, he simultaneously sees the patient and the ultrasound image in perfect alignment with the body. Stetten says that he merges the virtual image in three dimensions with the interior of the patient. This simultaneous viewing makes the ultrasound image appear to occupy the same physical space as the body being imaged. The effect relies on precise geometric relationships between the ultrasound slice scanned, the monitor displaying the slice, and the mirror. "The reflected image is optically indistinguishable from the corresponding space within the patient," explains Stetten. For more information, call (412) 624-7762.
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.