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Displaying 44076 - 44100 of 73779

Large-Scale Metrology - An Update

January 1, 2002
Author(s)
William T. Estler, K L. Edmundson, G Peggs, D H. Parker
Developments in large-scale engineering metrology since the 1978 report of Puttock are reviewed. Advances in optical technology and fast, low-cost computation have led to wide-spread use of laser trackers and digital photogrammetry for general-purpose

LIQUID AGENT TRANSPORT AROUND SOLID OBSTACLES

January 1, 2002
Author(s)
Cary Presser, J F. Widmann, G Papadopoulos
The focus of this effort is to investigate the dispersal of liquid fire suppression agents around solid obstacles, and obtain a better understanding of the physical processes of droplet transport in cluttered spaces. An experimental investigation is

Mass Absorption Coefficient of Tungsten, 1606-2100 eV

January 1, 2002
Author(s)
Zachary H. Levine, S Grantham, I McNulty
The transmission of soft x-rays with photon energies from 1606 eV to 2106 eV was measured for tungsten using thin film samples and a synchrotron source. This region includes the M IV and M V edges. The two tungsten films had thicknesses of 107.7 10 nm and

Measurement and Control of Metal Flow-Rate in a Gas-Metal Atomizer

January 1, 2002
Author(s)
Stephen D. Ridder
Research at NIST on the production of metal powder by gas atomization has focused on the development of sensors for use in PC based control systems. The ultimate goal is an inexpensive, robust means to automate the process that will improve powder quality

Measurement of Heat Conduction through Metal Spheres

January 1, 2002
Author(s)
Michael A. Lewis, Ray Radebaugh
This paper describes the results of the measurements of heat conduction through a bed of packed metal spheres. Spheres were packed in a fiberglass-epoxy cylinder, 24.4 mm in diameter and 55 mm in length. The cold end of the packed bed was cooled by a
Displaying 44076 - 44100 of 73779
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