Professor Karl Gschneidner is an Ames Laboratory senior metallurgist and Iowa State University professor who may help bring about new technology for cooling home refrigerators, air conditioning units, and electronics. He works with the Astronautic Corporation of America (Milwaukee, WI) as part of an agreement with Ames Laboratory developing a new refrigerator that uses gadolinium, a ferromagnetic material. The metal heats when exposed to a magnetic field and cools when the field is removed. "A key difference between vapor cycle refrigerators and magnetic refrigerators is the amount of energy loss incurred during the refrigeration cycle," according to Gschneidner. "In current vapor-cycle refrigerators, energy loss during compression and expansion is significant," he notes. "There is virtually no energy loss during magnetizing and demagnetizing in magnetic refrigerators." The new refrigerator has a rare-earth permanent magnet and a wheel with segments coated with the gadolinium. The wheel passes through a gap in the magnet where a concentrated magnetic field heats it up. Circulating water draws the heat from the metal, but the material cools further as a result of the magnetocaloric effect. A second stream of circulating water is cooled by the gadolinium and circulated through the refrigerator's cooling coils. For more information, contact Gshneidner at (515) 294-7931 or go to www.iastate.edu.
These new 3D-printing technologies and printers include some that are truly boundary-breaking: a sophisticated new sub-$10,000, 10-plus materials bioprinter, the first industrial-strength silicone 3D-printing service, and a clever twist on 3D printing and thermoforming for making high-quality realistic models.
Ear-based heart-rate monitoring gained momentum recently, as sensor maker Valencell Inc. announced it has licensed its biometric earpiece technology to Samsung Electronics Co. Ltd for use in so-called “hearable devices.”
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.