Terry Blumenthal is not a medical device designer, but he has an important message for engineers who design defibrillators. The Wake Forest University psychologist is working with cardiologist Charles Swerdlow to find ways of reducing the painful electric shock administered by defibrillators when they activate. "We considered using weaker electric shocks, but that didn't work," says Swerdlow. "Then we tried changing the shape of the waveform, but that has not yet been successful," he explains. They eventually found that when a painless electric "pre-pulse" precedes a painful electric shock, the pre-pulse seems to reduce the body's startle response and minimize pain. "The pre-pulse interrupts everything, including the subsequent processing of pain," says Blumenthal. "It diminishes the neural circuits' ability to respond to subsequent painful stimulus," he says. Testing the hypothesis involved delivering 150V shocks to volunteers, who then rated the shock's painfulness with and without pre-pulses. Although volunteers received the same shock, the painfulness was rated lower with the pre-pulse. "There may be a variety of ways to integrate these finding into other applications using sound, sight, and other modalities," says Blumenthal. For more information, e-mail firstname.lastname@example.org.
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.