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Displaying 37851 - 37875 of 74120

NIST time and frequency radio stations: WWV, WWVH, and WWVB

January 1, 2005
Author(s)
Glenn Nelson, Michael A. Lombardi, Windell Oskay
The National Institute of Standards and Technology (NIST) provides standard time and frequency information through three radio broadcast stations that are routinely used by millions of customers. The stations, WWV and WWVB, located in Fort Collins

Non-Linear Charge Transport in Polythiophene Under High AC Field

January 1, 2005
Author(s)
Jan Obrzut, Tatiana Psurek, C. K. Chiang, Dean DeLongchamp
Complex impedance and conductivity were measured for regioregular poly(3-hexylthiophene) (P3HT) at alternating current (AC) voltages using a waveform technique. The waveforms were Fourier transformed from time domain to frequency domain and analyzed at

Office of Microelectronics Programs - Programs, Activities, and Accomplishments

January 1, 2005
Author(s)
Stephen Knight, Joaquin (. Martinez, Michele L. Buckley
The microelectronics industry supplies vital components to the electronics industry and to the U.S. economy, enabling rapid improvements in productivity and in new high technology growth industries such as electronic commerce and biotechnology. That

On Higher Order Corrections for Propagating Uncertainties

January 1, 2005
Author(s)
Chih-Ming Wang, Hariharan K. Iyer
The ISO Guide to the Expression of Uncertainty in Measurement (GUM) recommends the use of a first-order Taylor series expansion for propagating errors and uncertainties. The GUM also suggests the use of a second-order Taylor series approximation for

Optical Anisotropy of Sheared Carbon-Nanotube Suspensions

January 1, 2005
Author(s)
D J. Fry, B Langhorst, H W. Kim, E A. Grulke, Haonan Wang, Erik K. Hobbie
We measure the anisotropy of sheared carbon nanotube suspensions for a range of concentration, aspect ratio, and strain rate using a variety of methods. Our measurements highlight the importance of hydrodynamic interactions, with scaling over a broad range
Displaying 37851 - 37875 of 74120
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