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Displaying 46951 - 46975 of 73985

Tensile Creep in the Next Generation Silicon Nitride

January 1, 2001
Author(s)
F Lofaj, Sheldon M. Wiederhorn, Gabrielle G. Long, P R. Jemian
The tensile creep behavior of a Lu-containing silicon nitride (SN 281) was characterized in the temperature range of 1350oC to 1550oC for test periods up to 10000h. For the same test conditions, the minimum strain rates were several orders of magnitude

Textile Composites: Modeling Strategies

January 1, 2001
Author(s)
S V. Lomov, G Huysmans, Y Luo, Richard~undefined~undefined~undefined~undefined~undefined Parnas, A Prodromou, I Verpoest, Frederick R. Phelan Jr.
Textile materials are characterised by the distinct hierarchy of structure, which should be represented by a model of textile geometry and mechanical behaviour. In spite of a profound investigation of textile materials and a number of theoretical models

Textile Composites: Modelling Strategies

January 1, 2001
Author(s)
S V. Lomov, G Huysmans, Y Luo, Richard~undefined~undefined~undefined~undefined~undefined Parnas, A Prodromou, I Verpoest, Frederick R. Phelan Jr.

The Ampere and Electrical Standards

January 1, 2001
Author(s)
Randolph Elmquist, Marvin E. Cage, Yi-hua D. Tang, Anne-Marie Jeffery, Joseph R. Kinard Jr., Ronald F. Dziuba, Nile M. Oldham, Edwin R. Williams
This paper describes some of the major contributions to metrology and physics made by the NIST Electricity Division, which has existed since 1901. It was one of the six original divisions of the National Bureau of Standards. The Electricity Division

The Application of Optical Coherence Tomography to Problems in Polymer Matrix Composites

January 1, 2001
Author(s)
Joy Dunkers, Frederick R. Phelan Jr., D P. Sanders, M J. Everett, William H. Green, Donald L. Hunston, Richard~undefined~undefined~undefined~undefined~undefined Parnas
The Composites Group at the National Institute of Standards and Technology has found optical coherence tomography (OCT) to be a powerful tool for non-destructive characterization of polymer matrix composites. Composites often exhibit superior properties to

The Atom Laser

January 1, 2001
Author(s)
Edward W. Hagley, Lu Deng, William D. Phillips, K Burnett, Charles W. Clark

The Boundary Lubrication Properties of Model Esters

January 1, 2001
Author(s)
P M. McGuiggan
The friction of three chemically distinct esters was measured in order to determine how molecular architecture influences friction. The friction coefficients of mica surfaces separated by a thin film (

The Candela and Photometric and Radiometric Measurements

January 1, 2001
Author(s)
Albert C. Parr
The national measurement system for photometric and radiometric quantities is presently based upon techniques and a measurement chain that make these quantities traceable to a high accuracy cryogenic radiometer. The redefinition of the candela in 1979

The Effect of Pb Contamination on the Solidification Behavior of Sn-Bi Solders

January 1, 2001
Author(s)
Kil-Won Moon, William J. Boettinger, Ursula R. Kattner, C A. Handwerker, D J. Lee
This paper presents experimental results and theoretical calculations to evaluate the effects of Pb contamination on the solidification behavior of Sn-x mass Bi alloys (x = 5, 10, and 58 mass %). The pasty (mushy) range, the type of solidification path

The g Factor of the Bound Electron in Hydrogenlike Carbon

January 1, 2001
Author(s)
H Haeffner, N Hermanspahn, H -. Kluge, G Marx, W Quint, S Stahl, T Valenzuela, G Verdu, G Werth
The experimental determination of the magnetic moment of the bound electron in hydrogen-like ions is an important test of the theory of quantum electrodynamics in strong Coulomb fields. It represents a clean test of pure QED effects because it is not very

The GAMS 4 Flat Crystal Facility

January 1, 2001
Author(s)
Ernest G. Kessler, Jr, Maynard S. Dewey, R Deslattes, Albert Henins, H G. B{omlat}rner, M Jentschel, H Lehmann

The GAMS4 Flat Crystal Facility

January 1, 2001
Author(s)
Ernest G. Kessler, Maynard S. Dewey, R Deslattes, Albert Henins, H G. Borner, M Jentschel, H Lehmann
A high-resolution flat crystal gamma-ray facility, GAMS4, has been constructed at the high flux reactor at the Institut Laue-Langevin (ILL), Grenoble, France. The facility is located at the exit of a through-tube equipped to place sources in a neutron flux
Displaying 46951 - 46975 of 73985
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