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Smart lights, nonstick implants and 100th birthday of electronics at science & technology meeting

BR> II. SOLVING STICKINESS IN HEART IMPLANTS
III. 100TH ANNIVERSARY OF ELECTRONICS
IV. CHEMICAL "DEFECT ENGINEERING"
V. NOVEL QUASICRYSTAL FRICTION PROPERTIES VI. MODULATING THE CELLULAR ENVIRONMENT
VII. IRON DOTS FOR RELIABLE DATA STORAGE
VIII. ENZYMES ON SWITCHABLE SURFACES

I. SMART LIGHTS
Fred Schubert of Rensselaer Polytechnic Institute (EFSchubert@rpi.edu) will present a new light-emitting-diode (LED) structure, incorporating what is called a "high-reflectivity omni-directional reflector." The new reflector, made of three layers (a semiconductor, a dielectric and a metal) loses five times less light than a reflector made solely of metal. Schubert also reports that green, red and blue LEDs combined have the potential to be about 20% more efficient than the traditional phosphorus-based white LEDs currently in use. Schubert's tri-chromatic lights are twice as efficient as incandescent lights (32 lumens/watt, compared to 16 lumens/watt) and could be made four times as efficient. "We will see a huge transformation in the field of lighting, including the availability of smart lights which will be able to adapt to certain requirements and environments," Schubert said. "I expect great advances from this field." (Paper WL-WEM9, Wednesday, November 17, 2004, 11:00 AM, Room 304B)

II. SOLVING STICKINESS IN HEART IMPLANTS
Proteins tend to stick to surfaces. In the case of a medical stent or heart implant, the protein fibrinogen, which initiates clotting, sticks to the surface of the plastic implant. Then fibrinogen attracts platelets, which continue the clotting process and can clog up the implant. So one way to stop the clotting, reported by Thomas Horbett of the University of Washington in Seattle (horbett@uweb.engr.washington.edu) is to stop the fibrinog
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Contact: Ben Stein
bstein@aip.org
301-209-3091
American Institute of Physics
27-Sep-2004


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