U.S. flag

An official website of the United States government

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.

Search Publications

NIST Authors in Bold

Displaying 3351 - 3375 of 7109

Time Dependent Driving Forces and the Kinetics of Tricalcium Silicate Hydration

April 22, 2015
Author(s)
Jeffrey W. Bullard, George W. Scherer, Jeffrey J. Thomas
Simulations of tricalcium silicate (C3S) hydration using a kinetic cellular automaton program, HydratiCA, indicate that the net rate depends both on C3S dissolution and on hydration product growth. Neither process can be considered the sole rate

Figure metrology for x-ray focusing mirrors with Fresnel holograms and photon sieves

June 20, 2014
Author(s)
Ulf Griesmann, Johannes A. Soons, Quandou (. Wang, Lahsen Assoufid
We report on interferometric measurements of the figure error of an ultra-precise mirror with the shape of an elliptical toroid for the diffraction limited focusing of hard x-rays from an undulator x-ray source. We describe measurement configurations using

CYCLE D Version 4.0: Theoretical Vapor Compression Cycle Design Program

June 23, 2009
Author(s)
J S. Brown, Piotr A. Domanski
This paper presents Version 4.0 of the CYCLE_D: NIST Vapor Compression Cycle Design Program. The model can simulate a basic subcritical or transcritical refrigeration cycle, both with or without a liquidline/ suction-line heat exchanger. In addition, the

Cyber Security Metrics and Measures

March 2, 2009
Author(s)
Paul E. Black, Karen A. Scarfone, Murugiah P. Souppaya
Metrics are tools to facilitate decision making and improve performance and accountability. Measures are quantifiable, observable, and objective data supporting metrics. Operators can use metrics to apply corrective actions and improve performance

Introducing "Insecure IT"

January 20, 2009
Author(s)
David R. Kuhn, Hart Rossman, Simon Liu
This article introduces a new department for IT Professional that will cover security in IT systems, ranging from desktops to global e-commerce networks. Our goal is to offer ideas to improve IT security, both by looking at ways it can go wrong as well as

The Refprop Database for the Thermophysical Properties of Refrigerants

September 14, 2003
Author(s)
Mark O. McLinden, Eric W. Lemmon, Marcia L. Huber
Property databases are widely used for the design and analysis of refrigeration systems. Version 7 of the NIST REFPROP Reference Fluid Thermodynamic and Transport Properties) database is described. Compared with previous versions, the database includes

Issues Related to Spray Combustion Modeling Validation

January 1, 2001
Author(s)
J F. Widmann, Cary Presser
Validation of CFD predictions for spray combustion application has been a challenging task due to difficulties in both modeling and experimental measurements. However, validation is considered to be an essential exercise for the success of CFD tools in the
Displaying 3351 - 3375 of 7109
Was this page helpful?