Crystals grown in space may hold an important key for the improvement and development of the next generation of computers and communication systems. "Better crystals would improve LEDs, photo detectors, lasers, and wireless devices," says John Walker, a professor of mechanical and industrial engineering at the University of Illinois. He is one of several engineers and scientists working with the Marshall Space Flight Center—NASA's lead center for microgravity research in materials science that is developing alloy crystals. Alloy crystals are blends of germanium and silicon that have highly desirable thermoelectric and electro-optic properties, according to Walker. He explains that NASA, for example, is interested in the crystals for use as solar panels. "The only problem with alloy crystals is that they are so far impossible to grow on Earth because of the effects of gravity. Germanium generally sinks to the bottom of the melt in the crucible because it's three time heavier than silicon," explains Walker. He says that gravity destroys the homogeneous concentration in the crystal. "On Earth, gravity presses the liquid against the walls of the container, resulting in the formation of faults, dislocations, and contact stresses in the growing crystal." The ingredients do not separate in the absence of gravity, which is why Walker proposes growing the crystals on the International Space Station. The pencil-thin crystals would be grown in special ampules within the magnetic damping furnaces on the space station. Walker wants to reproduce them on Earth. Contact Walker at (217) 333-7979.
Time was when sports equipment was made only from common, everyday, low-tech materials. But now sports equipment has a new, high-tech ingredient that is helping players take their game to the next level.
A humanoid diving robot has recovered treasure from the wreck of French King Louis XIV's flagship, untouched for nearly 400 years. The bot not only looks somewhat human-shaped, it's also got stereoscopic humanlike vision, artificial intelligence, and haptic force feedback.
Design collaboration now includes the entire value chain. From suppliers to customers, purchasing to outside experts, the collaborative design team includes internal and external groups. The design process now stretches across the globe in multiple software formats.
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.