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Search Publications

NIST Authors in Bold

Displaying 44801 - 44825 of 73697

Using the Virtual Cybernetic Building Testbed and FDD Test Shell for FDD Tool Development

October 1, 2001
Author(s)
Steven T. Bushby, Natascha S. Milesi-Ferretti, Cheol D. Park, Michael A. Galler
vances in building automation technology have taken place for a variety of building services including heating, ventilating, and air conditioning (HVAC) control systems, lighting control systems, access control systems, and fire detection systems. In spite

Using X-Ray Topography to Study Fracture of Single-Crystal Ceramics

October 1, 2001
Author(s)
David R. Black, Robert S. Polvani, George D. Quinn
X-ray topography provides a unique view of the surfaces of single-crystal samples, both before and after fracture. The diffraction topograph, which is sensitive to local strain and/or crystallographic orientation, can be used to inspect samples prior to

Using X-Ray Topography to Study Fracture of Single-Crystal Ceramics

October 1, 2001
Author(s)
Robert S. Polvani, D Black
X-ray topography provides a unique view of the surfaces of single-crystal samples, both before and after fracture. The diffraction topograph, which is sensitive to local strain and/or crystallographic orientation, can be used to inspect samples prior to

Wavelet Transform Approach to the Analysis of Specular X-Ray Reflectivity Curves

October 1, 2001
Author(s)
I R. Prudnikov, R J. Matyi, R Deslattes
A method for analyzing X-ray reflectivity curves from multilayered structures with interfacial roughness using a wavelet transform approach has been developed. By using this approach, we have been able (1) to extract the contribution of a particular rough

X-Ray Reflectivity and FTIR Measurements of N2 Plasma Effects on the Density Profile of Hydrogen Silsesquioxane Thin Films

October 1, 2001
Author(s)
V. J. Lee, C G. Chao, Eric K. Lin, Wen-Li Wu, B M. Fanconi, J K. Lan, Y L. Cheng, H C. Liou, Y L. Wang, M S. Feng
Non-destructive, specular X-ray reflectivity (SXR) measurements were used to investigate N2 plasma effects on the density depth profile of hydrogen silsesquioxane (HSQ) thin films. The SXR data indicate that the density profile of an HSQ film without

The 2000 Material Research Society (MRS) Fall Meeting Report

September 27, 2001
Author(s)
Winnie K. Wong-Ng
Keeping with tradition, the 2000 MRS annual meeting again took place in Boston Copely Plaza from November 27 to December 1. The 2000 meeting was well organized and well attended, with a total of 4600 attendees representing industrial, academic, and

The Philosophy of Information Retrieval Evaluation

September 24, 2001
Author(s)
Ellen M. Voorhees
Evaluation conferences such as TREC, CLEF, and NTCIR are modern examples of the Cranfield evaluation paradigm. In the Cranfield paradigm, researchers perform experiments on test collections to compare the relative effectiveness of different retrieval

Sub-dekahertz spectroscopy of 199 Hg +

September 21, 2001
Author(s)
J. C. Bergquist, R J. Rafac, B. A. Young, James A. Beall, Wayne M. Itano, David J. Wineland
Using a laser that is frequency locked to a Fabry-Perot etalon of high finesse and stability, we probe the 5d 106s 2S = (F=0, m f=0) 5d 96s 2 2 d5/2 (F=2, m f=0) electric-quadrupole transition of a single laser-cooled 199Hg + ion stored in a cryogenic

Large Eddy Simulation of Wood Combustion

September 19, 2001
Author(s)
Simo A. Hostikka, Kevin B. McGrattan
The purpose of this work is to study the coupling of the one-dimensional pyrolysis model to the computational fluid dynamics model for fire simulation. The large eddy simulation of the gas phase flow is combined with the combustion model using flame sheet

Acoustic Measurements in Gases, Chapter 10

September 15, 2001
Author(s)
Michael R. Moldover, Keith A. Gillis, John J. Hurly, J B. Mehl, J Wilhelm
Cylindrical acoustic resonators developed at the National Institute of Standards and Technology (NIST) are routinely used to measure the speed of sound in gases with uncertainties of 0.01% or less. The pressure dependence of the data is fitted with model

Speed of Sound as a Thermodynamic Property of Fluids

September 15, 2001
Author(s)
Daniel G. Friend
In this chapter, we review the principles of sound propagation in fluid systems. From a study of the hydrodynamic equations, sound propagation is shown to be a wave phenomenon. The speed of sound then can be derieved at any state point from a knowledge of

Microdisplay Metrology Research at NIST

September 14, 2001
Author(s)
Paul A. Boynton
Measuring the optical characteristics of a microdisplay produces challenges to traditional display metrology. When using light-measuring devices to measure scenes having high contrasts or wide color variations, the instruments suffer the effects of veiling

Development of Combustion and Radiation Models for Large Scale Fire Simulation

September 13, 2001
Author(s)
Kevin B. McGrattan, J E. Floyd, Glenn P. Forney, Simo A. Hostikka, Howard R. Baum
In cooperation with the fire protection engineering community, a numerical fire model, Fire DynamicsSimulator (FDS), is being developed at NIST to study fire behavior and to evaluate theperformance of fire protection systems in buildings. Version 1 of FDS
Displaying 44801 - 44825 of 73697
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