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2:00 p.m.
Kim Engineering Building, Rm. 1110
For More Information:
Ted Knight
301 405 3596
teknight@umd.edu
http://www.ece.umd.edu/colloquium
Booz Allen Hamilton Distinguished Colloquium in Electrical and Computer Engineering
"John Ambrose Fleming and the Birth of Electronics"
 Dr. H. F. Dylla
Executive Director and CEO, American Institute of Physics
May 15, 2009, 2:00 p.m.
Jeong H. Kim Engineering Building, Kay Boardrooms, Rms. 1111 & 1107
ABSTRACT:
2004 marked the centenary of John Ambrose Fleming’s momentous patent on the thermionic diode that can be called the birth of electronics. The “Edison effect” was discovered in 1882; this was later shown to be the result of thermionic emission of electrons from a heated filament into a vacuum. Edison did not make any significant devices based on this discovery, and the effect was ignored for more than 8 years. In 1890 Fleming explained the effect and showed that the thermionic diode could be used as a rectifier. Fourteen years later Fleming filed his 1904 patent on the thermionic diode. It was the first public announcement of the electron tube; this revolutionized the development of radio and led to the invention of the thermionic triode by Lee de Forest in 1906. The background to these significant events in the first generation of electronics will be described.
BIOGRAPHY:
H. Frederick Dylla is the Executive Director and CEO of the American Institute of Physics (AIP), a not-for-profit umbrella organization for 10 scientific societies that publishes scientific journals and provides information-based products and services. Prior to this appointment, Dylla was with the U.S. Department of Energy's Thomas Jefferson National Accelerator Facility (Jefferson Lab) in Newport News, Virginia for 17 years while he concurrently held an Adjunct Professorship in Physics and Applied Science at the College of William and Mary. As the Chief Technology Officer and Associate Director for the Free-Electron Laser (FEL) program at Jefferson Lab, Dylla was responsible for initiating, building, and operating the world’s most powerful tunable laser system.
The author of over 190 publications, Dylla received his B.S., M.S. and Ph.D. in physics from the Massachusetts Institute of Technology. He is a Past President of the AVS (one of AIP’s ten member societies) where he was elected a Fellow in 1998 and is currently a distinguished lecturer for AVS. Dylla is also a Fellow of the American Physical Society and a founding member of its largest unit—Forum of Industrial and Applied Physics. He has been an active member in numerous local and regional technology development organizations, including appointments by the Virginia governor to two scientific commissions, and has served on many national advisory committees for the U.S. Department of Energy, Department of Defense, and the National Science Foundation.
Since becoming the Executive Director of AIP in April of 2007, Dylla has been active in promoting the importance of scientific journals for the scientific enterprise, advocating improved access to scientific information through various business models. In 2008, Dylla was elected to the Board of Directors of the International Association of Scientific, Technical and Medical publishers (STM), and to the Executive Committee of the Professional and Scholarly Publication (PSP) of the American Association of Publishers (AAP).
This Event is For: Campus • Clark School • All Students • Faculty • Corporate • Donors
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