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Displaying 12401 - 12425 of 17284

A Low-Cost Density Reference Phantom for Computed Tomography

January 2, 2009
Author(s)
Zachary H. Levine, Ming-Dong Li, Anthony P. Reeves, David F. Yankelevitz, Joseph J. Chen, Eliot L. Siegel, Adele P. Peskin, Diana N. Zeiger
We have characterized a commercially-available polyurethane foam which is marketed for modeling parts in the aircraft, automotive, and related industries. We find that the foam may be suitable for use as a density reference standard in the range below -700

Alloy Selection

October 16, 2008
Author(s)
C A. Handwerker, Ursula R. Kattner, Kil-Won Moon, J Bath, E -. Bradley, P Snugovsky
In this chapter, the key results and analyses leading to the choice of tin-silver-copper alloys by NEMI as the new national standard Pb-free solder system are discussed in detail. These include data on phase transformations in solders (including melting

A compact phase delay technique for increasing the amplitude of coherent population trapping resonances in open Lambda systems

August 1, 2006
Author(s)
V Shah, Svenja A. Knappe, P Schwindt, Vladislav Gerginov, John E. Kitching, Leo W. Hollberg
We propose and demonstrate a novel technique for increasing the amplitude of coherent population trapping (CPT) resonance in open Lambda systems. The technique requires no complex modifications to the conventional CPT setup and is compatible with standard

A compact phase delay technique for increasing the amplitude of coherent population trapping resonances in open Lambda systems

August 1, 2006
Author(s)
V Shah, Svenja A. Knappe, P Schwindt, Vladislav Gerginov, John E. Kitching, Leo W. Hollberg
We propose and demonstrate a novel technique for increasing the amplitude of coherent population trapping (CPT) resonance in open Lambda systems. The technique requires no complex modifications to the conventional CPT setup and is compatible with standard

IC Test Structures for Multi-Layer Interconnect Stress Determination

January 1, 2000
Author(s)
S. A. Smee, Michael Gaitan, Donald B. Novotny, Yogendra K. Joshi, David L. Blackburn
A new method for measuring strain in multi-layer IC interconnects is presented. This method utilizes process compatible micromachined test structures and is applied to the determination of longitudinal interconnect stress in a standard dual-metal-layer

Servo Level Algorithms for the NASREM Telerobot Control System Architecture

November 4, 1987
Author(s)
J Fiala, Ronald Lumia, James S. Albus
The NASA/NBS Standard Reference Model (NASREM) Telerobot Control System Architecture defines a logical computing architecture for robotics. The architecture provides a framework for integrating a variety of control techniques, and for combining
Displaying 12401 - 12425 of 17284
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