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NIST Authors in Bold

Displaying 50151 - 50175 of 73697

Modeling of Bare and Aspirated Thermocouples in Compartment Fires

April 1, 1999
Author(s)
L G. Blevins, William M. Pitts
As part of an effort to characterize the uncertainties associated with temperature measurements in fire environments, models of bare bead single-shielded aspirated, and double-shielded aspirated thermocouples were developed and used to study the effects of

Narrow-Line Doppler Cooling of Strontium to the Recoil Limit

April 1, 1999
Author(s)
K R. Vogel, Tim P. Dinneen, Alan Gallagher, J L. Hall
Experimental results on narrow line cooling line cooling of strontium atoms are presented. Doppler cooling is performed on the 1S o- 3P 1 intercombination transition at 689 nm resulting in temperatures near the recoil limit in a one-dimensional (1-D)

New Steam Properties Are Coming

April 1, 1999
Author(s)
J Bellows, J B. Sewell, Daniel G. Friend, Allan H. Harvey, Johanna Levelt Sengers, William T. Parry, Jan V. Sengers, H J. White
The IFC-67 Formulation for Industrial Use for the thermodynamic properties of water and steam (familiar to many from its implementation in the ASME Steam Tables) has served as the international steam property standard for contractual and design

NIST International and Academic Activities for FY 1997/1998

April 1, 1999
Author(s)
M F. McCurley
The Office of International and Academic Affairs (OIAA) is responsible for the coordination of all international and academic activities at the National Institute of Standards and Technology (NIST). This report details international and academic activities

NIST Research Toward Construction Site Integration and Automation

April 1, 1999
Author(s)
William C. Stone, K A. Reed, P Chang, L E. Pfeffer, Adam S. Jacoff
Current uses of computers in construction include design, planning, scheduling, and cost estimating. Much more could be achieved on a fully computer integrated construction site. This paper describes initial work at NIST toward construction site

Pendular States of Highly Vibrationally Excited Molecules

April 1, 1999
Author(s)
J Ortigoso, Gerald T. Fraser, Brooks H. Pate
The behavior of coherent field-induced hybrids of field-free rotor states (pendular states) is studied in energy regions where intramolecular vibrational energy redistribution phenomena are important, is studied. The energy region corresponding to the 4Ņ 1

Performance Measurement of Remote ATM Clusters

April 1, 1999
Author(s)
C Martin, Alan Mink, Wayne J. Salamon, Michael D. Indovina, M M. Courson
We investigate the configuration and performance of remote commodity computing clusters. This is the dynamic pooling of separate clusters into a single large remote cluster via existing LANs or even the Internet. We discuss the configuration and setup of

Polycapillary X-Ray Optic Spectral Gain and Transmission

April 1, 1999
Author(s)
J E. Gormley, Eric B. Steel, Q Xiao, Terrence J. Jach
Polycapillary x-ray optics are gaining increased attention as their transmission characteristics and manufacturing difficulties are better understood. This paper reports experimental results obtained with an optic that was designed for use with both Mo KΑ

Primary Acoustic Thermometer for Use Up to 800 K

April 1, 1999
Author(s)
Dean C. Ripple, Dana R. Defibaugh, Keith A. Gillis, Michael R. Moldover
Primary acoustic thermometers determine the thermodynamic temperature of a monatomic gas from measurements of the speed of sound in the gas. Here, we describe the design and construction of an acoustic thermometer designed to operate at temperatures up to

Primary Acoustic Thermometry From 217 K to 303 K

April 1, 1999
Author(s)
Michael R. Moldover, S J. Boyes, A R. Goodwin, Christopher W. Meyer
We report new values for the difference (T T 90) between Kelvin thermodynamic temperatures T and ITS-90, the International Temperature Scale of 1990. The new data span the range 217 K {less then or equal to} T 303 K with standard uncertainties of 0.6 mK. A

Programmable 1 V DC Voltage Standard

April 1, 1999
Author(s)
Charles J. Burroughs, Samuel Benz, Clark A. Hamilton, Todd E. Harvey
We have developed a Josephson voltage standard that produces intrinsically stable voltages that are programmable of 32 768 SNS (superconductor-normal-superconductor) Josephson junctions. The output can source or sink up to 2 mA and thus has high noise
Displaying 50151 - 50175 of 73697
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