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Displaying 4626 - 4650 of 7112

Automated Tracking of Structural Steel Members at the Construction Site

September 18, 2000
Author(s)
K M. Furlani, L E. Pfeffer
This paper presents further development and experimental testing of Comp-TRAK, a prototype system for identification and spatial tracking of structural steel components on a live construction site. Comp-TRAK is a web-based system for rapid tracking of

Wind-Induced Peak Bending Moments in Low-Rise Building Frames

August 1, 2000
Author(s)
M Gioffre, Mircea Grigoriu, M Kasperski, Emil Simiu
We present a procedure for estimating peaks of non-Gaussian processes representing fluctuating internal forces induced by wind in low-rise building frames. The procedure is designed for inclusion in computer programs that use surface pressure data bases to

A Modular Architecture for STEP

December 1, 1999
Author(s)
Allison Barnard Feeney, David M. Price
This paper presents the current direction in the architecture of STEP (STandard for the Exchange of Product model data, ISO 10303). STEP is an international standard designed to enable the exchange of product data between heterogeneous computer systems

Tip Characterization for Dimensional Nanometrology

January 1, 1999
Author(s)
John S. Villarrubia
Technological trends are increasingly requiring dimensional metrology at size scales below a micrometer. Scanning probe microscopy has unique advantages in this size regime, but width and roughness measurements must be corrected for imaging artifacts. This

Analytical/Experimental Study of Vibration of a Room-Sized Airspring-Supported Slab

March 1, 1998
Author(s)
H Amick, B Sennewald, E C. Teague, Brian R. Scace
This paper reports the results of the finite element analysis and in-situ testing of a large-scale (4 m x 10 m) pneumatically isolated concrete slab are reported. The slab was constructed as a design prototype for next generation metrology laboratories at

Vibration of a Room-Sized Airspring-Supported Slab

January 1, 1998
Author(s)
H Amick, B Sennewald, N C. Pardue, E C. Teague, Brian R. Scace
This paper reports the results of the finite element analysis and in situ testing of a large-scale (4 m x 10 m) pneumatically isolated concrete slab. The slab was constructed as a design prototype for next-generation metrology laboratories at the National

Migration Plan for Product Data Standards

February 1, 1996
Author(s)
Mary Mitchell, William Gruttke
… standards is that standards ease the migration from one computing environment to another. But what happens when the …

Radiation Scattered by Two Touching Spheres

June 20, 1994
Author(s)
Egon Marx
During the manufacture of powder metal, the size distribution of the metal spheres can be determined to some extent by the distribution of light scattered by the spheres while they are streaming by a laser beam. Micrographs show the presence of chains of

Development Plan: Configuration Management Systems and Services

January 1, 1990
Author(s)
Sanford P. Ressler, Susan Katz
This document describes a plan to establish configuration management systems and services to serve the needs of both international and national efforts. The National PDES Testbed was established at the National Institute of Standards and Technology (NIST)

MRI Birdcage RF Coil Resonance with Uncertainty and Relative Error Convergence Rates

October 4, 2017
Author(s)
Jeffrey T. Fong, Nathanael A. Heckert, James J. Filliben, Pedro V. Marcal, Robert Rainsberger, Karl F. Stupic, Stephen E. Russek
In a magnetic resonance imaging (MRI) system, it is necessary to excite the nuclei of a patient into coherent precession for imaging. This requires a coupling between the nuclei and a source of radio frequency (RF) power using a transmitter. To receive a
Displaying 4626 - 4650 of 7112
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