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 58751 - 58775 of 74192

Reciprocity Relations in Waveguide Junctions

July 1, 1993
Author(s)
Dylan F. Williams, Roger Marks
The Lorentz reciprocity condition is applied to junctions composed of reciprocal media which connect uniform but otherwise arbitrary waveguides. An expression relating the forward and reverse transmission coefficients is derived and factored into two terms

Specifications for an Application Protocol Development Environment

July 1, 1993
Author(s)
Steve Clark, Allison Barnard Feeney, James E. Fowler
The National PDES Testbed project at NIST is focused on the development and implementation of the emerging international Standards for the Exchange of Product model data (STEP). One subproject within the Testbed is the effort to establish an Applications

The Language of Tolerances

July 1, 1993
Author(s)
Ted Hopp
Dimensional tolerancing is a language used to communicate product specifications. Effective communication using this language relies on there being a common, shared meaning for tolerances. By this measure, the language relies on there being a common

Uncertainty Intervals for Polarized Beam Scattering Asymmetry Statistics

July 1, 1993
Author(s)
Kevin Coakley, Jabez J. McClelland, Michael H. Kelley, Robert Celotta
In many scattering experiments, the quantity of most direct physical interest is a measure of the difference between two closely related scattering signals, each generated by a Poisson scattering process. This difference is often expressed in terms of an

The Use of Vision and Touch Sensors for Dimensional Inspection Tasks

June 2, 1993
Author(s)
M Nashman
The purpose of dimensional inspection is to verify the geometry of a manufactured part. A machined part is either accepted or rejected based upon the sensed errors between the object and its specified geometry as defined in a CAD (Computer Aided Design)

A Tribometer for Measurements in Hostile Environments

June 1, 1993
Author(s)
Andrew Slifka, J Chaudhuri, R Compos, James D. Siegwarth
A tribometer at the National Institute of Standards and Technology in Boulder, Colorado is used to measure the coefficient of friction and the wear rate for various specimens in a controlled atmosphere of oxygen or non-corrosive gas. The wide range of

AP Validation Workshop

June 1, 1993
Author(s)
Mary Mitchell
During the course of the ISO/IPO meeting held in Seattle, Washington, in April of 1992, a one-day workshop was held on AP validation requirements and procedures. Included in this workshop were representatives from all approved AP projects and planning

Computer-Aided Manufacturing System Engineering

June 1, 1993
Author(s)
Charles R. McLean
A new type of computer-aided engineering environment is envisioned which will improve the productivity of manufacturing/industrial engineers. This environment would be used by engineers to design and implement future manufacturing systems and subsystems

Dimensional Inspection Planning Based on STEP and DMIS

June 1, 1993
Author(s)
Shaw C. Feng
An international standard on product data representation and exchange for dimensional inspection planning is being developed. This paper provides a review of fundamental technology enabling the standard development and describes the current status of an
Displaying 58751 - 58775 of 74192
Was this page helpful?