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Search Publications

NIST Authors in Bold

Displaying 51551 - 51575 of 73697

Mission Structure for an Unmanned Vehicle

September 1, 1998
Author(s)
A Meystel, Yigal Moscovitz, Elena R. Messina
The 4-D/Real-Time Control Systems Architecture (4- D/RCS) defines a hierarchical decomposition for intelligent systems, with corresponding command and control pathways. In order to design the vehicle¿s behavior generation functions, we developed a set of

Multiple Small-Angle Neutron Scattering

September 1, 1998
Author(s)
Gabrielle G. Long, Susan Krueger, Andrew J. Allen
Over the past decade, a multiple small-angle neutron scattering (MSANS) formalism has been developed to enable researchers to derive microstructural parameters from multiply-scattered small-angle neutron data. The MSANS formalism is particularly useful in

Optical Characterization of Diffuser-Input Standard Irradiance Meters

September 1, 1998
Author(s)
George P. Eppeldauer, M Racz, Thomas C. Larason
Standard quality irradiance meters have been developed at the National Institute of Standards and Technology (NIST) to realize detector based spectral irradiance scale. The design criteria and the optical and radiometric characterization of diffuser-input

Parallel Kinematic Machine Research at NIST: Past, Present, and Future

September 1, 1998
Author(s)
Albert J. Wavering
Unchained from the confines of controller limitations, the industrial application of parallel kinematic machines in manufacturing is beginning to emerge. The launch of commercially available hexapod machine tools at the 1994 International Manufacturing

Refrigerants for the 21st Century / ASHRAE/NIST Refrigerants Conference

September 1, 1998
Author(s)
Piotr A. Domanski
The goal of the 1997 ASHRAE/NIST Refrigerants Conference was to review available air-conditioning and refrigeration options in response to ozone depletion, global warming, and technology advances. The two-day program consisted of 16 invited comprehensive

Simulations of the Thermal Conductivity in the Vicinity of the Critical Point

September 1, 1998
Author(s)
D J. Searles, D J. Evans, Howard J. Hanley, S Murad
Isothermal-isobaric nonequilibrium molecular dynamics and Green-Kubo simulations are developed and used to calculate the thermal conductivity of an 864 particle Lennard-Jones fluid, with one simulation for 6912 particles, in the vicinity of the critical

Solute Trapping and Solute Drag in a Phase-Field Model of Rapid Solidification

September 1, 1998
Author(s)
N A. Ahmad, A A. Wheeler, William J. Boettinger, Geoffrey B. McFadden
During rapid solidification, solute may be incorporated into the solid phase at a concentration significantly different than that predicted by equilibrium thermodynamics. This process, known as solute trapping, leads to a progressive reduction in the

Sprinkler, Smoke and Heat Vent, Draft Curtain Interaction: Large Scale Experiments and Model Development. International Fire Sprinkler-Smoke and Heat Vent-Draft Curtain Fire Test Project (NISTIR 6196-1)

September 1, 1998
Author(s)
Kevin B. McGrattan, Anthony P. Hamins, D W. Stroup
The International Sprinkler, Smoke and Heat Vent, Draft Curtain Fire Test Project organized by the National Fire Protection Research Coundation (NFPRF) has brought together a group of industrial sponsors to study the interaction of sprinklers with roof

Standards for the Rapid Prototyping Industry

September 1, 1998
Author(s)
Kevin K. Jurrens
This discussion paper proposes that development of formalized standards for the rapid prototyping (RP) industry will help enable the continued growth and further advancement of RP technologies. Appropriate standards can provide common methods for measuring

Summary of the Structural Performance of Single-Family, Wood-Frame Housing

September 1, 1998
Author(s)
Charles W. Yancey, Geraldine Cheok, Fahim H. Sadek, B Mohraz
A review of the structural performance of single-family, wood-frame houses is presented. The performance of these structures in selected earthquakes and hurricanes is summarized. In general, wood-frame houses performed well with relatively few instances of

The 1996 North American Interagency Intercomparison of Ultraviolet Monitoring Spectroradiometers

September 1, 1998
Author(s)
E A. Thompson, B. Carol Johnson, P Disterhoft, D Wardle, E Wu, J Ehramjian, J Tusson, T Mestechkina, M Beaubian, J Gibson, D Hayes, J DeLuisi, E A. Early, W Mou
Concern over stratospheric ozone depletion has prompted several government agencies in North America to establish networks of spectroradiometers for monitoring solar ultraviolet irradiance at the surface of the Earth. To assess the ability of

The NIST Design/Process Planning Integration Project

September 1, 1998
Author(s)
Walter W. Nederbragt, Robert Allen, Shaw C. Feng, Serge Kaing, Ram D. Sriram, Yuyun Zhang
This paper presents a description of the National Institute of Standards and Technology (NIST) Design/Process Planning Integration (DPPI) Project, which addresses the need for improving communications between design and process planning activities
Displaying 51551 - 51575 of 73697
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