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.
The freezing point of tin (231.928 degrees C) is a defining fixed point of the International Temperature Scale of 1990 (ITS-90). Realization of this freezing
A primary objective of any process of photography, electronic publishing, or printing is to reproduce all colors as perfectly as possible. A good starting point
Geoffrey B. McFadden, Sam R. Coriell, R F. Sekerka
In previous work, we found approximate solutions for paraboloids having perturbations with four-fold axial symmetry in order to model dendritic growth in cubic
An equation determining the steady-state profile of a liquid meniscus advancing or receding across a heated plate is derived. The effects of liquid evaporation
The development and maintenance of an economy's standards and conformance technical infrastructure is critical to its economic health. By increasing the
Magdalena Navarro, Sally Bruce, B. Carol Johnson, A V. Murthy, Robert D. Saunders
Blackbody sources with nearly unity emittance that are in equilibrium with a pure freezing metal such as gold, silver, or copper are used as primary standard
This report documents the selection of material, the certification procedure and its control, and the analysis of measurement uncertainty for a family of new
Anthony D. Putorti Jr., T D. Belsinger, W H. Twilley
In order to characterize the water spray from a standard orifice,pendent spray sprinkler, measurements were made using an optical array probe droplet analyzer
Although a host of technologies exists to detect and prevent attacks against computers, a human must coordinate responding to a successful network penetration
James A. St Pierre, Curtis H. Parks, Bryan C. Waltrip
This report provides an overview of a recent workshop held at NIST in Gaithersburg, July 15-17, 1999, on Electronic Commerce of Component Information. The
The Carderock Division of the Naval Surface Warfare Center is developing the Automated Paint Application, Containment, and Treatment System (APACTS) to apply
This document provides comprehensive information about the LEIDIR prototype automatic hypertext generation system, developed by the National Institute of
This report outlines an experimental plan designed to quantify the effect of elevated temperature on the mechanical properties of high-strength concrete. The
Jiann C. Yang, Anthony P. Hamins, Michelle K. Donnelly
A series of low gravity experiments were conducted to investigate the combustion of supported thermoplastic polymer spheres under varying ambient conditions
The NIST / ACI / ASTM Workshop on Modelling Service Life and Life-Cycle Cost of Steel-Reinforced Concrete was focused on possibilities for developing and
Passive energy dissipation devices are used to reduce the damaging effects of earthquakes. These devices can absorb a portion of the earthquake-induced energy
This report discusses a simple test method for image-based biometric verification systems. A fingerprint based computer login system is used as an example of
This investigation compared the performance of R22 to the performance of propane (R290) and zeotropic mixtures of HFC's and hydrocarbons in a water-to-water
Andrew D. Koffman, T. M. Souders, Gerard N. Stenbakken, Hans Engler
This user's guide will assist software users in the understanding of the theory and procedures underlying the High-dimensional Empirical Linear Prediction (HELP
This is the fifty-ninth issue of a quarterly publication providing information on the technical work of the National Institute of Standards and Technology
Established in 1994, the National Semiconductor Metrology Program (NSMP) narrows the ever-present gap between the kind of metrology the semiconductor industry
The manufacture of the halons widely used in fire extinguishing systems was banned in 1994 due to their deleterious effect on stratospheric ozone. Since the
This paper outlines general physical and computational issues associated with performing numerical simulation of fire suppression. Fire suppression encompasses
Jiann C. Yang, Michelle K. Donnelly, William L. Grosshandler, N C. Prive
Mosl or the current methods for fire suppression efficiency screening (e.2.. cup burners) are designed for evaluating gaseous fire suppression agents. Potential