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Displaying 55276 - 55300 of 74337

Internal Friction and Elastic Constants of Sintered Titanium

December 1, 1996
Author(s)
H M. Ledbetter, Martin Dunn, Sudook A. Kim
Using a Marx-oscillator standing-wave resonance method, we measured the internal friction {quaternary}^-1^ of sintered titanium containing up to 26 volume-percent voids (c). The surprising {quaternary} 1 versus-c curve shape, an exponential increased, lead

Mechanical Properties of Aluminum Nitride Substrates

December 1, 1996
Author(s)
Jay S. Wallace, Lin-Sien H. Lum
Aluminum nitride (AlN),because of its high thermal conductivity, is seeing increased use for heat management applications of semiconductor devices. With the likelihood of large mechanical stresses, both during fabrication as well as in service, mechanical

Modeling and Measurements of Soot and Species in a Laminar Diffusion Flame.

December 1, 1996
Author(s)
I. M. Kennedy, C Yam, D. C. Rapp, R J. Santoro, Wing Tsang
A model of laminar, soot-laden ethene diffusion flames has been developed and compared with measurements in nonsooting and sooting flames. Concentrations of stable gas-phase species were measured with mass spectrometry; laser-induced fluorescence was used

Optimal Frequency Measurements with Maximally Correlated States

December 1, 1996
Author(s)
John J. Bollinger, Wayne M. Itano, David J. Wineland, D J. Heinzen
We show how maximally correlated states of N two-level particles can be used in spectroscopy to yield a frequency uncertainty equal to (NT)-1, where T is the time of a single measurement. From the time-energy uncertainty relation we show that this is the

Representation of Axes for Geometric Fitting

December 1, 1996
Author(s)
Ted Hopp
We review methods for representing geometric axes in three dimensions and discuss why these methods have undesirable properties for geometric fitting applications. We then describe a new representation that seems better suited for use in problems of
Displaying 55276 - 55300 of 74337
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