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NIST Authors in Bold

Displaying 40901 - 40925 of 74225

Papers from 1991-2003 Halon Options Technical Working Conferences (HOTWC)

September 1, 2003
Author(s)
Richard G. Gann, Star R. Burgess, Paul A. Reneke
As a result of the 1987 Montreal Protocol on Substances that Deplete the Ozone Layer and the 1990 U.S. Clean Air Act, there began a movement toward phaseout of the use of the halon fire suppressants. The HOTWC was initiated as a forum for such contributory

Phototransduction: Crystal Clear

September 1, 2003
Author(s)
K D. Ridge, N G. Abdulaev, M Sousa, K Palczewski
Advances in the structure determination of proteins involved in vertebrate phototransduction suggest that this will be the first G protein-coupled receptor-mediated signaling pathway for which a complete molecular description is available. This review

Progress in Primary Acoustic Thermometry at NIST: 273 K to 505 K

September 1, 2003
Author(s)
Gregory F. Strouse, Dana R. Defibaugh, Michael R. Moldover, Dean C. Ripple
The NIST Acoustic Thermometer determines the thermodynamic temperature by measuring the speed of sound of argon in a spherical cavity. We obtained the thermodynamic temperature of three fixed points on the Interna-tionalTemperature Scale of 1990: the

Radiolytic Reactions of Monochloramine in Aqueous Solutions

September 1, 2003
Author(s)
G A. Poskrebyshev, Robert E. Huie, Pedatsur Neta
Monochloramine reacts with hydrated electrons very rapidly, k(NH 2CI + e aq-) = (2.2 0.2) x 10 10 L mol -1, to produce oNH 2 radicals. It reacts with oOH radicals more slowly, k(NH 2Cl + oOH) = (5.2 0.6) x 10 8 L mol -1 s -1, to produce oNHCl radicals

Reciprocity Law Experiments in Polymeric Photodegradation: A Critical Review

September 1, 2003
Author(s)
Jonathan W. Martin, Joannie W. Chin, Tinh Nguyen
celerating the photodegradation of polymeric materials is of great interest in weathering research. One way of achieving acceleration is by exposing polymeric materials to a high radiant flux, but questions have arisen as to whether high radiant flux

Refractive Index Study of Al x Ga 1-x N Films Grown on Sapphire Substrates

September 1, 2003
Author(s)
Norman Sanford, Larry Robins, Albert Davydov, Alexander J. Shapiro, Denis V. Tsvetkov, Vladimir A. Dmitriev, Stacia Keller, Umesh Mishra, Steven P. DenBaars
A prism coupling method was used to measure the ordinary (italic}n o) and extraordinary (italic}n e) refractive indices of Al xGa 1-xN films, grown by hydride vapor phase epitaxy (HVPE) and metalorganic chemical vapor deposition (MOCVD) on sapphire, at

Response of a Silicon Photodiode to Pulsed Radiation

September 1, 2003
Author(s)
Robert E. Vest, Steven E. Grantham
Both the integrated-charge and peak-voltage responsivity of a 1 cm2 Si photodiode optimized for the extreme ultraviolet have been measured with 532 nm wavelength pulsed radiation. The peak power of the optical pulse is varied from 35 mW to 24 kW with a

Simplified System for Creating a Bose-Einstein Condensate

September 1, 2003
Author(s)
H J. Lewandowski, D M. Harber, D Whitaker, Eric A. Cornell
We designed and constructed a simplified experimental system to create a Bose-Einstein condensate in 87Rb. Our system has several novel features including a mechanical atom transfer mechanism and a hybrid Ioffe-Pritchard magnetic trap. The apparatus has

Stability of fiber Bragg grating wavelength calibration references

September 1, 2003
Author(s)
Shellee D. Dyer, Jonathan D. Kofler, Robert J. Espejo, Shelley M. Etzel
We discuss the key considerations necessary to create stable fiber Bragg grating (FBG) wavelength references. We describe two high-accuracy measurements to characterize the gratings, and we demonstrate gratings with wavelength stability better than 1 pm

Structural Signatures of Varification in Hard Core Fluids

September 1, 2003
Author(s)
S K. Kumar, Jack F. Douglas, Francis W. Starr, S Garde
We investigate the capacities of local measures of free volume in liquids to predict basic aspects of the fluids state- the formation of a liquid from a gas, complex 'caged' fluid dynamics and vitrification. Specifically, we investigate the capacity of the

Submillimeter-Wavelength Plasma Chemical Diagnostics for Semiconductor Manufacturing

September 1, 2003
Author(s)
Eric C. Benck, G Y. Golubiatnikow, Gerald T. Fraser, B Ji, S A. Motika, E J. Karwacki
Submillimeter-wavelength, linear-absorption spectroscopy has been applied to the chemical diagnostics of a reactive-ion etching plasma in a modified capacitively coupled Gaseous Electronics Conference (GEC) reactor. Approximately 1 mW of narrow-band (

Techniques for Primary Acoustic Thermometry to 800 K

September 1, 2003
Author(s)
Dean C. Ripple, Dana R. Defibaugh, Michael R. Moldover, Gregory F. Strouse
The NIST Primary Acoustic Thermometer will measure the difference between the International TemperatureScale of 1990 and the Kelvin Thermodynamic Scale throughout the range 273 K to 800 K with uncertainties of only afew millikelvins. The acoustic

Temperature and Flux Scales for Heat-Flux Sensor Calibration

September 1, 2003
Author(s)
A V. Murthy, D P. DeWitt, Benjamin K. Tsai, Gerald T. Fraser, Robert D. Saunders
Methodologies for calibrating heat-flux sensors designed for direct measurement of heat-transfer at a surface are presented. These sensors, extensively used in fire-test methods and aerospace applications, vary in range from a few kW/m 2 to in excess of

Temperature Metrology and Its Impact on Industry

September 1, 2003
Author(s)
Hratch G. Semerjian, Ellyn S. Beary
Temperature measurement represents one of the most frequently and broadly used measurements, with a majority of products manufactured having temperature measurement devices as an esential component. The accuracy and precision of these temperature
Displaying 40901 - 40925 of 74225
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