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Standard quality irradiance meters have been developed at the National Institute of Standards and Technology (NIST) to realize detector based spectral...
Unchained from the confines of controller limitations, the industrial application of parallel kinematic machines in manufacturing is beginning to emerge. The...
The National Institute of Standards and Technology (NIST) has been using the Real-time Control System (RCS) Reference Model Architecture for building control...
What is intelligence? Where did it come from? What is its fundamental nature? What are its elemental constituents? Can it be created artificially? If so how...
A desirable basic behavior of a group of autonomous vehicles while in motion is to keep a predefined formation. Normally units are trained to move in formation...
Samuel R. Low III, Walter S. Liggett Jr, David J. Pitchure
Rockwell hardness test blocks, whether standardized at the primary national laboratory level or by secondary commercial laboratories, have been certified...
The first release of the International Standard STEP (ISO 10303)was made in 1994. It permits the exchange between dissimilar Computer-Aided Design (CAD) systems...
Walter W. Nederbragt, Robert Allen, Shaw C. Feng, Serge Kaing, Ram D. Sriram, Yuyun Zhang
This paper presents a description of the National Institute of Standards and Technology (NIST) Design/Process Planning Integration (DPPI) Project, which...
Robert Allen, Srinivas Nidamarthi, P V. Rao, Richard L. Rhorer, Ram D. Sriram, E C. Teague
We report on our experience using the Virtual Reality Markup Language (VRML) to collaborate on the design and manufacture of an artifact transport system (ATS)...
Error sources in gage block mechanical comparisons can range from classical textbook examples (thermal gradients, correct temperature value, and correct master...
The National Institute of Standards and Technology (NIST) has been developing the \Real-Time Control Sys- tems (RCS)" software for more than two decades and us-...
This discussion paper proposes that development of formalized standards for the rapid prototyping (RP) industry will help enable the continued growth and...
A variety of different kinds of photomask critical dimension (CD) metrology tools are available today to help meet current and future metrology challenges...
Theodore D. Doiron, Dennis S. Everett, Bryon S. Faust, Eric S. Stanfield, John R. Stoup
The current definition of length of a gage block is a very clever attempt to evade the systematic errors associated with the wringing layer thickness and...
The 4-D/Real-Time Control Systems Architecture (4- D/RCS) defines a hierarchical decomposition for intelligent systems, with corresponding command and control...
This paper presents a method for determining the location of geometric elements that compose the external features of referencing fixtures. Since in most...
This paper concerns the informational requirements of layered manufacturing (LM). The most common industrial use of LM today is for rapid prototyping, but we...
This paper presents a novel design for a practical tactilesensing mechanical fixture. The fixture consists of two tactilesensing surfaces, a cylindrical surface...
This paper presents a case study in the use of the Internet as a medium for exchange of information and delivery of computer-aided design and computer-aided...
One of the most elusive measurement elements in gage block interferometry is the correction for the phase change on reflection. Techniques used to quantify this...
We have found conceptual problems with the far-field formula 1 for mode field diameter First, the formulation is incomplete in that it ignores the obliquity...
We have developed a biased perturbation method for calculating the index profiles of single-mode fibers from either near-field or far-field data. Unlike other...
Multimode fiber bandwidth is currently measured using an overfilled launch condition. Such a launch is achieved by uniformly exciting the core and launching...
Paul A. Williams, A. J. Barlow, C. Mackechnie, John B. Schlager
A common characteristic of current methods for measuring polarization-mode dispersion (PMD) is the need for a broad optical bandwidth. With the increasing use...
Gale A. Holmes, R C. Peterson, Donald L. Hunston, Walter G. McDonough
Most ductile polymers exhibit nonlinear viscoelastic behavior above 1% strain. In structural applications where matrix deformation may play and important role...
Two Josephson Array Voltage Standard Systems using different calibration algorithms are operated at the National Institute of Standards and Technology. A manual...