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 Application Protocol Information Base (APIB) is an on-line repository of documents for the Standard for the Exchange of Product model data (STEP, officially
The Standard for the Exchange of Product Model Data (STEP) is being developed under the auspices of the International Organization for Standardization (ISO)
To test the flammability of materials, a sample is placed on a substrate and exposed to a uniform heat flux. Measurements include sample mass and upper and
William L. Grosshandler, Jiann C. Yang, Thomas G. Cleary
The search for alternatives to halons for fire suppression applications has identified not only new compounds which have physical properties similar to the
Standard methods exist at NIST for calibrating thermal radiation detectors up to 10 kW/m2 using blackbody caviies, and up to 40kW/m2 using a monochromatic laser
Jiann C. Yang, Anthony P. Hamins, N Gorchkov, M Glover
Polymer combustion is a highly complicated process where chemical reactions may occur not only in the gas phase, but also in the condensed phase as well as at
Carbon monoxide (CO) detectors are being used increasingly in residential buildings to warn occupants about CO concentrations that could potentially cause acute
The motions of buoyant flows contained within vertical shafts are being investigated in an experimental program that will lead to a prediction of the transport
Valeri I. Babushok, T Noto, Anthony P. Hamins, Wing Tsang
The burning velocity is an important parameter which characterizes the inhibition efficiency of halon-containing additives employed as flame retardants. The
In order to integrate motion control hardware into an advanced operating system such as Microsoft Windows NT, a flexible set of device drivers delivering a wide
A key issue of integrating process planning systems with design systems and production planning systems is how to overcome barriers in data exchange and sharing
One of the major goals of fire research is to develop the capability to make realistic assessments of fire impact and risk by utilizing models. Currently the
W. S. Chien, Jiann C. Yang, M D. King, William L. Grosshandler
Due to its ozone-depleting potential, halon 1301 (CF3Br) has been banned from production under the Montreal Protocol. The research for halon replacement(s) has
This document describes user requirements for implementing STEP in a production environment for packaging applications used in the auto industry. The main
The temperature glide of zeotropic mixtures during phase change provides the opportunity to limit throttling losses of the refrigeration cycle by intracycle
Part 227 of ISO 10303, "Plant Spatial Configuration," specifies an application protocol (AP) for the exchange of spatial configuration information of process