Sunspots mark areas on the Sun's surface where the star's magnetic field becomes so intense that a buoyant tube of magnetism literally pops through the Sun's surface. The magnetic field disrupts the outward convection of heat, resulting in dark Earth-sized splotches that are some 2,500 degrees Celsius cooler than the rest of the solar surface. Periods of high sunspot activity also usher in an increase in the number of solar flares--intense bursts of magnetic energy hurling energetic particles out from the Sun. When these flares reach the Earth's magnetic field, they can wreak havoc with electrical lines, communications satellites, and even automatic garage door openers. John H. Thomas, an astrophysicist at the University of Rochester, and Benjamin Montesinos of Madrid's Laboratory for Space Astrophysics and Fundamental Physics have developed what they say is a more realistic version of the siphon-flow model, which predicts how gas flows from sunspots into the solar atmosphere. The work could also offer insights into other astrophysical processes that involve strong magnetic fields and jets of gas, such as when stars form or die--an area that's the focus of much research. For more information, contact John H. Thomas at (716) 275-6717.
Unlike industrial robots, which suffered a slight overall slump in 2012, service robots continue to be increasingly in demand. The majority are used for defense, such as unmanned aerial vehicles (UAVs); and agriculture, such as milking robots.
Festo's BionicKangaroo combines pneumatic and electrical drive technology, plus very precise controls and condition monitoring. Like a real kangaroo, the BionicKangaroo robot harvests the kinetic energy of each takeoff and immediately uses it to power the next jump.
Design News and Digi-Key presents: Creating & Testing Your First RTOS Application Using MQX, a crash course that will look at defining a project, selecting a target processor, blocking code, defining tasks, completing code, and debugging.
These are the toys that inspired budding engineers to try out sublime designs, create miniature structures, and experiment with bizarre contraptions using sets that could be torn down and reconstructed over and over.
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.