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Displaying 29801 - 29825 of 73929

Fabry-Perot Metrology for Displacements up to 50 mm

October 16, 2008
Author(s)
John R. Lawall
A system designed to apply Fabry-Perot interferometry to the measurement of displacements is described. Two adjacent modes of a Fabry-Perot cavity are probed, and both the absolute optical frequencies and their difference are used to determine

Fastener Quality Act of 1990; Public Law 101-592

October 16, 2008
Author(s)
Charles D. Ehrlich
The OSS' Technical Standards Activities Program (TSAP) manages responsibilities assigned to NIST under the Fastener Quality Act (FQA) of 1990. Fasteners are a $6 billion U.S. industry critical to the automobile, aerospace, construction, chemical and

Ferdinand Rudolph Hassler (1770-1843) : A Twenty Year Retrospective, 1987-2007

October 16, 2008
Author(s)
H Hassler, Charles A. Burroughs
This publication will bring together remarks, papers, and photographs associated with various Hassler-related events held in Philadelphia and the Washington Metropolitan Area over the past twenty years. Starting with the 180th anniversary in 1987 of the

Field Testing Hopper Scales

October 16, 2008
Author(s)
R C. Suiter
The testing of hopper scales seems to be intimidating to many field inspectors. They dread the task of doing a substitution test or a strain load test; there is often confusion about the difference between the two types of tests, how the error is

Finite Element Modeling of Hybrid Polymer Composite Beams

October 16, 2008
Author(s)
Hai C. Tang, Tze J. Chuang, Tinh Nguyen, Joannie W. Chin, Hanchang F. Wu
Fiber-reinforced polymeric composites provide lightweight, high strength, and corrosive resistance to severe environmental exposures. These composites have been extensively used in aerospace and military application over the last three decades and are

Fluorescence Anistropy Measurements of Oriented Polymers

October 16, 2008
Author(s)
Anthony J. Bur, S C. Roth
Fluorescence anistropy area scans of sheet and film specimens have been carried out using a fiber optic sensor that contains polarizing optical elements. Measurements on polyethylene terephthalate food packaging, which contains the fluorescent dye

Forum Report: Permissive Metric Only Labeling

October 16, 2008
Author(s)
Kenneth S. Butcher
Report on the Forum on Metric-only Labeling held on November 7, 2002, in Washington, DC. The National Institute of Standards and Technology and the National Conference on Weights and Measures sponsored this forum to initiate a joint effort to eliminate

Fourier Instrumentation for Radiation Thermometry

October 16, 2008
Author(s)
F J. Dunmore
A miniature Fourier transform spectrometer (MFTS) has been tested as a device for remotely measuring the temperature of a high-stability/emissivity blackbody. The commercially manufactured device is based on the novel design of a polarizing Wollaston prism

Fractographic Failure Analysis of a Broken Tooth Following Larnygoscopy

October 16, 2008
Author(s)
Janet Quinn, L W. Schultheis
ckground: A tooth broken subsequent to laryngoscopy was fractographically analyzed. The science of fractography involves examination of fracture surfaces to determine information such as failure causes, crack progressions, and stress configurations.Case

Fracture Modes in Brittle Coatings With Large Interlayer Modulus Mismatch

October 16, 2008
Author(s)
Herzl Chai, Brian R. Lawn, S Wuttiphan
Fracture modes in a model glass/polymer coating/substrate system indented with hard spheres are investigated. The large modulus mismatch between the glass and polymer results in distinctive transverse fracture modes in the brittle coating: exaggerated

Fracture of Silicate Glasses: Ductile or Brittle?

October 16, 2008
Author(s)
J -. Guin, Sheldon M. Wiederhorn
Atomic force microscopy is used to investigate the possibility of crack tip cavitation during crack growth in silicate glasses. Matching areas on both surfaces of a crack were mapped and then compared for soda-lime silicate glass and for silica glass. For
Displaying 29801 - 29825 of 73929
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