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Displaying 1176 - 1200 of 2125

ASME B89.4.19 Performance Evaluation Tests and Geometric Misalignments in Laser Trackers

January 30, 2009
Author(s)
Balasubramanian Muralikrishnan, Daniel S. Sawyer, Christopher J. Blackburn, Steven D. Phillips, Bruce R. Borchardt, William T. Estler
Small and unintended offsets, tilts, and eccentricity of the mechanical and optical components in laser trackers introduce systematic errors in the measured spherical coordinates (angles and range readings), and possibly in the calculated lengths of

Dimensional measurement traceability of 3D imaging data

January 19, 2009
Author(s)
Steven D. Phillips, Craig M. Shakarji, Michael Krystek, K Summerhays
This paper discusses the concept of metrological traceability to the SI unit of length, the meter. We describe how metrological traceability is realized, give a recent example of the standardization of laser trackers, and discuss progress and challenges to

Simulation-based Manufacturing Interoperability Standards and Testing

January 7, 2009
Author(s)
Guodong Shao, Swee K. Leong, Charles R. McLean
Software applications for manufacturing systems developed using software from different vendors typically cannot work together. Develop¬ment of custom integrations of manufacturing software incurs costs and delays that hurt industry productivity and

Advice from the CCL on the use of unstabilized lasers as standards of wavelength: the helium-neon laser at 633 nm

January 1, 2009
Author(s)
Jack A. Stone Jr., Jennifer Decker, Patrick Gill, Andrew Lewis, Patrick Juncar, Daniele Rovera, Miguel Villiseid
The Consultative Committee for Length has recommended that red (633 nm) unstabilized Helium-Neon lasers, operating on the 3s2¿_2p4 transition, should be included in the list of standard frequencies for realization of the meter. This article discusses

Scatterfield Optical Imaging for sub-10 nm Dimensional Metrology

January 1, 2009
Author(s)
Richard M. Silver
Recent developments in optical microscopy promise to advance optical metrology and imaging to unprecedented levels through theoretical and experimental development of a new measurement technique called "scatterfield optical imaging". ". Current metrology

NDRProfile Schema Version 1.0 User Guide

December 16, 2008
Author(s)
Joshua Lubell, Betty Harvey, Puja Goyal, Katherine C. Morris
The NDRProfile schema provides a common syntax for exchanging, managing, and reusing XML Schema naming and design rules (NDRs). NDRProfile, used by NIST's Quality of Design (QOD) application as a format for import and export of rule sets, is also useful

2nd Annual Tri-National Workshop on Standards for Nanotechnology - (NIST presentations)

December 10, 2008
Author(s)
Ronald G. Dixson, Jon R. Pratt, Vincent A. Hackley, James E. Potzick, Richard A. Allen, Ndubuisi G. Orji, Michael T. Postek, Herbert S. Bennett, Theodore V. Vorburger, Jeffrey A. Fagan, Robert L. Watters
A new era of cooperation between North American National Measurement Institutes (NMIs) was ushered by the National Research Council of Canada Institute for National Measurement Standards (NRC-INMS) on February 7, 2007 when the first Tri-National workshop

Blind estimation of general tip shape in AFM imaging

December 1, 2008
Author(s)
Fenglei Tian, Xiaoping Qian, John S. Villarrubia
The use of flared tip and bi-directional servo control in some recent atomic force microscopes (AFM) has made it possible for these advanced AFMs to image structures of general shapes with undercuts and reentrant surfaces. Since AFM images are distorted

Development Life Cycle for Semantically Coherent Data Exchange Specification

December 1, 2008
Author(s)
Boonserm Kulvatunyou, Katherine C. Morris, Simon P. Frechette
In enterprise integration, a data-exchange specification is an architectural artifact that evolves along with the business. Maintaining a coherent, data-exchange, semantic model is an important, yet non-trivial task. A coherent, semantic model of data-

Computational Parameters in Simulation of Microscope Images

November 28, 2008
Author(s)
Egon Marx, James E. Potzick
The simulation of microscope images computed from scattered fields determined using integral equations depend on a number of parameters that are not related to the scatterer or to the microscope but are choices made for the computation method. The effect

Integral Equations for 3-D Scattering: Finite Strip on a Substrate

November 28, 2008
Author(s)
Egon Marx
Singular integral equations that determine the exact fields scattered by a dielectric or conducting finite strip on a substrate are presented. The computation of the image of such a scatterer from these fields by Fourier optics methods is also shown.

A Semantic-Mediation Architecture for Interoperable Supply-Chain Applications

November 10, 2008
Author(s)
Marko Vujasinovic, Nenad Ivezic, Boonserm Kulvatunyou, Edward J. Barkmeyer Jr., Michele Missikoff, Francesco Taglino, Zuran Marjanovic, Igor Miletic
This paper presents a semantic-mediation architecture that enables standards-based interoperability between heterogeneous supply-chain applications. The architecture was implemented using a state-of-the-art semantic-mediation toolset for design-time and

An Evaluation of Description Logic for the Development of Product Models

November 10, 2008
Author(s)
Xenia Fiorentini, Sudarsan Rachuri, Hyo Won Suh, Jae H. Lee, Ram D. Sriram
The languages and logical formalisms developed by information scientists and logicians concentrate on the theory of languages and logical theorem proving. These languages, when used by domain experts to represent their domain of discourse, most often have

Proprietary Design Information and Fruit Pies

November 7, 2008
Author(s)
John A. Horst
The proliferation of proprietary design info exchange formats is causing high costs to manufacturers. The standards solution is offered as both attainable and worth the effort. A design information exchange standards development life-cycle is proposed.

Ontology-based Technologies - Technology Transfer from Bioinformatics?

November 5, 2008
Author(s)
Fabian M. Neuhaus
In the call for paper for OIC 2008 the description of the conference contains the following optimistic outlook: New approaches are required to enable greater flexibility, precision, timeliness and automation of analysis in response to rapidly evolving

User's Guide for the Quality of Design Testing Tool and the Content Checker

November 5, 2008
Author(s)
Katherine C. Morris, Simon P. Frechette, Puja Goyal, Joshua Lubell, Boonserm Kulvatunyou, Salifou Sidi Malick, Nicolas Brayard, Severin Tixier
This document describes the operation and usage of the Quality of Design and the Content Checker Testing Tools. These tools were developed at the National Institute of Standards and Technology (NIST) to support people in developing standards for the

Calibration of a Computer Assisted Orthopedic Hip Surgery Phantom

November 4, 2008
Author(s)
Daniel S. Sawyer, Nicholas G. Dagalakis, Craig M. Shakarji, Yong Sik Kim
Orthopedic surgeons have identified a need for calibration artifacts (phantoms) to establish the traceability (to the SI unit of length) of measurements performed with Computer Assisted Orthopedic Surgery (CAOS) systems. These phantoms must be lightweight

Reasoning in Manufacturing Part-Part Examples with OWL 2

October 29, 2008
Author(s)
Nenad Krdzavac, Conrad E. Bock
This report examines whether the Web Ontology Language 2 (OWL 2) is expressive enough for some common manufacturing examples involving relations between parts of composite or assembled objects (part-part relations). We specify the semantics of these

A COMPACT, COMPOUND ACTUATOR FOR THE MOLECULAR MEASURING MACHINE

October 19, 2008
Author(s)
Jing Li, Yin-Lin Shen, Jaehwa Jeong, Fredric Scire, John A. Kramar
A compact, two-stage, vertical actuator with built-in sensors has been developed for the Molecular Measuring Machine (M3) and other potential precision instrumentation applications, such as scanning probe microscopy (SPM). In this article, we describe the

Error Motions of a Non-orthogonal Rotary Axis

October 19, 2008
Author(s)
Michael L. McGlauflin, Shawn P. Moylan
Error-motions of rotating axes are one of many sources of imprecision in machining. Accurate determination of axis of rotation error motions of the rotary axes has a direct influence on the accuracy of the finished part. International and U.S. national

International photomask linewidth comparison by NIST and PTB

October 17, 2008
Author(s)
James E. Potzick, Ronald G. Dixson, Richard Quintanilha, Michael T. Stocker, Andras Vladar, Egbert Buhr, Bernd Bodermann, Wolfgang Hassler-Grohne, Harald Bosse, C.G. Frase
In preparation of the international Nano1 linewidth comparison on photomasks between 8 national metrology institutes, NIST and PTB have started a bilateral linewidth comparison in 2008, independent of and prior to the Nano1 comparison in order to test the
Displaying 1176 - 1200 of 2125