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Displaying 49551 - 49575 of 74175

Equivalent Circuit Models for Coaxial OSLT Standards

December 1, 1999
Author(s)
Donald C. DeGroot, K. L. Reed, Jeffrey Jargon
We use a general description of transmission lines to develop analytic descriptions for offset OSLT (Open-Short-Load-Thru) standards used to calibrate vector network analyzers.

Exposure Parameters During Studies with ELF Magnetic and Electric Fields

December 1, 1999
Author(s)
Martin Misakian
Following a brief introduction to terminology that describes power frequency and other extremely low frequency [ELF] magnetic and electric fields, a short survey is given of methods for simulating and characterizing in a laboratory setting fields

Giving a Boost to Atoms

December 1, 1999
Author(s)
Kristian Helmerson
Matter waves can now be amplified in the same way that a laser amplifies light. Such matter-wave amplifiers will be essential for future developments in atom optics.

High Temperature Deformation of Silicon Nitride

December 1, 1999
Author(s)
Sheldon M. Wiederhorn
Three mechanisms for the creep of silicon nitride are discussed with regard to the microstructural variables that control creep. During the initial stages of creep, the amorphous silicate layer that coats all grains of silicon nitride is displaced from

High-Speed Resonant Cavity Enhanced Photodiodes

December 1, 1999
Author(s)
M. S. {Umlat}nl{umlat}, E. Vzbay, E. Towe, Richard Mirin, David H. Christensen
We have demonstrated RCE Schottky phodiodes with GaAs absorption regions in AlGaAs/AlAs microcavities (3).

Hydrodynamic Excitations for a Trapped Fermi Gas

December 1, 1999
Author(s)
G M. Bruun, Charles W. Clark
We discuss collective excitations of a trapped dilute Fermi gas within a hydrodynamic approximation. Analytical results are derived for both high- and low -temperature limits and are applied to 40K and 6Li systems of current experimental interest. We
Displaying 49551 - 49575 of 74175
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