An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Mean values, traditionally used as a location parameter in the analysis of intercomparisons, are known to lack stability against the effect of outliers. It is...
This paper describes an improved method for computing Fresnel integrals with an accuracy better than 1X10 -9, based on a known approximate formula for a...
M Levenson, D L. Banks, K Eberhardt, L M. Gill, William F. Guthrie, Hung-Kung Liu, M Vangel, James H. Yen, Nien F. Zhang
The problem of determining a consensus value and its uncertainty from the results of multiple methods or laboratories is discussed. Desirable criteria of a...
Tolerance design is the process of deriving a description of geometric tolerance specifications for a product from a given set of desired properties of the...
Igor Vayshenker, Shao Yang, Xiaoyu X. Li, Thomas Scott, Christopher L. Cromer
We describe a system for measuring the response nonlinearity of optical fiber power meters and detectors over a wide power dynamic range at telecommunication...
An axially-layered cylindrical dielectric resonator comprised of substrate and thin film is placed into a parallel plate waveguide and operated in axi-symmetric...
This paper presents an overview of a neutral reference architecture for integrating distributed manufacturing simulation systems with each other, with other...
The National Institute of Standards and Technology (NIST) is collaborating with vendors, users, and university researchers to develop a virtual manufacturing...
[For the latest information on vulnerabilities, see the National Vulnerability Database, nvd.nist.gov]The NIST computer security division has created a...
Jeffrey W. Gilman, Takashi Kashiwagi, A B. Morgan, Richard H. Harris Jr., L D. Brassell, Mark R. VanLandingham, C L. Jackson
We recently found that polymer layered-silicate (clay) nanocomposites have the unique combination of reduced flammability and improved physical properties...
William D. Walton, Nelson P. Bryner, Nora H. Jason
As part of an ongoing effort to update and sharpen the National Fire Research Agenda, the U.S. Fire Administration in cooperation with the Building and Fire...
William D. Walton, Nelson P. Bryner, Daniel M. Madrzykowski, James R. Lawson, Nora H. Jason
As part of an ongoing effort to update and sharpen the National Fire Research Agenda, the U.S. Fire Administration in cooperation with the Building and Fire...
D W. Stroup, Laurean A. DeLauter, J Lee, G Roadarmel
Rate of heat release is a critical parameter for evaluation of the fire properties of a material. The Large Fire Research Facility at the National Institute of...
Measured overall Nusselt numbers were determined for R22, R290, R290/600a, and R32/152a undergoing evaporation and condensation in a brazed plate heat exchanger...
Beginning with expressions for the vector potential, the equations for calculating the magnetic flux density from up to three rectangular loops of wire in the...
An auto-focusing method is described and practically applied to an optical disc test-bed. In this application, an optical microscope was used to create clear...
Walter S. Liggett Jr, Samuel R. Low III, David J. Pitchure, Jun-Feng Song
To determine the capability of a system for Rockwell C scale hardness, one must make test measurements, which can be planned and interpreted as explained in...
This paper describes a simple numerical integration method for diffraction integrals which is based on elementary geometrical considerations of the manner in...
A new formulation is presented for the thermodynamic properties of refrigerant 143a (1,1,1-trifluoroethane, CH 3-CF 3) based upon available experimental data...
Systems of manufacturing software are often constructed by integrating pre-existing software components. Accurate specification of the component interactions in...
In accordance with a notice published in the Federal Register, a workshop was conducted on June 23, 2000, at the National Institute of Standards and Technology...
This report summarizes the FY1999 technical activities of TechnologyServices, National Institute of Standards and Technology. These activitiesare in the areas...
This document presents an activity model that identifies the functions involved in the ship repair and conversion industry, and the information flows required...
This document specifies a framework of communication data in a supply chain system, which is viewed as a virtual enterprise. First presented is a requirement...
This paper describes the process-flow model as proposed for use in the Internet Commerce for manufacturing (ICM), a project of the National Advanced...
A considerable amount of work has been done in order to determine the atomic weight of bromine and the oft-repeated comparison of the atomic weights of silver...
Kenneth A. Snyder, Chiara C. Ferraris, Nicos Martys, Edward Garboczi
The suitability of using the initial current from the rapid chloride test (ASTM C 1202) to determine specimen conductivity is tested using impedance...
[For the latest information on vulnerabilities, see the National Vulnerability Database, nvd.nist.gov] It seems that every week, computer security organizations...