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Displaying 45901 - 45925 of 73994

The Location of Very Small Particles in Silane RF Discharge

April 1, 2001
Author(s)
K Rozsa, G Bano, Alan Gallagher
The size and location of silicon particles that grow in a pure silane, capacitively coupled RF discharge, are measured by laser light scattering. The discharge conditions were similar to those typically used to produce amorphous silicon devices, except the

The Location of Very Small Particles in Silane RF Discharges

April 1, 2001
Author(s)
K Rozsa, G Bano, Alan Gallagher
The size and location of silicon particles that grow in a pure silane, capacitively coupled rf discharge are measured by laser light scattering.The discharge conditions were similar to those typically used to produce amorphous silicon devices, except the

Thermal Conductivities of Alternatives to CFC-11 for Foam Insulation

April 1, 2001
Author(s)
Richard A. Perkins, L -. Cusco, J -. Howley, Arno R. Laesecke, S -. Matthes, M L. Ramires
The present work examines the thermal conductivities of several dilute vapors which are potential alternatives to chlorofluorocarbons (CFCs) for cellular-plastic foams. Thermal conductivity data are reported in the vapor phase, from 280 to 340 K, for

Thermodynamic and Structural Aspects of the Potential Energy Surface of Simulated Water

April 1, 2001
Author(s)
Francis W. Starr, Srikanth Sastry, E LaNave, A Scala, H E. Stanley, F Sciortino
Relations between the thermodynamics and dynamics of supercooled liquids approaching the glass transition have been propposed over many years. This connections is most obvious at low temperatures where the motion of the system can be partitioned into

Thermomechanical Oscillations in Material Flow During High-Speed Machining

April 1, 2001
Author(s)
Matthew A. Davies, Timothy J. Burns
This paper presents a nonlinear dynamics approach for predicting the transition from continuous to shear-localized chip formation in machining. Experiments and a simplified one-dimensional model of the flow both show that, as cutting speed is increased, a

Volume Visualization of Bose-Einstein Condensates

April 1, 2001
Author(s)
Peter M. Ketcham, D L. Feder, Charles W. Clark, Steven G. Satterfield, Terence J. Griffin, William L. George, Barry I. Schneider, W P. Reinhardt
Theoretical aspects of Bose-Einstein condensates are investigated by conducting computer simulations of their behavior. Scientific visualization techniques are employed in order to examine the large amount of data generated by simulation. Visualization of

Watching Dark Solitons Decay Into Vortex Rings in a Bose-Einstein Condensate

April 1, 2001
Author(s)
B P. Anderson, P C. Haljan, C A. Regal, D L. Feder, L A. Collins, Charles W. Clark
We have created spatial dark solitons in two-component Bose-Einstein condensates in which the soliton exists in one of the condensate components and the soliton nodal plane is filled with the second component. The filled solitons are stable for hundreds of

Wind and Seismic Effects: Proceedings of the 32nd Joint Meeting

April 1, 2001
Author(s)
Stephen A. Cauffman
This publication contains the proceedings of the 32nd Joint Meeting of the U.S.-Japan Joint Panel on Wind and Seismic Effects. The meeting was held May 16-19, 2000, at the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland (USA

IGBT Model Validation for Soft-Switching Applications

March 31, 2001
Author(s)
David W. Berning, Allen R. Hefner Jr.
Techniques are described for validating the performance of Insulated-Gate Bipolar Transistor (IGBT) circuit simulator models for soft-switching circuit conditions. The circuits used for the validation include a soft-switched boost converter similar to that

An Introduction to IPsec (Internet Protocol Security)

March 30, 2001
Author(s)
Sheila E. Frankel
IPsec (Internet Protocol Security) is an attempt to utilize cryptographic techniques in a global solution to the problem of Internet security. Rather than requiring each email program or Web browser to implement its own security mechanisms, IPsec involves

Users' Guide to the NIST-High-Voltage Capacitance Ratio Bridge

March 28, 2001
Author(s)
Eric D. Simmon, Gerald FitzPatrick, O. Petersons
This TechNote has been written as a guide to the operation of and applications for the NIST Capacitor Ratio Bridge (CRB). The theory, design, and operating principles of the CRB, sources of measurement error, and principal applications are discussed in

IEEE Transactions on Antennas and Propagation

March 27, 2001
Author(s)
Richard G. Geyer, J. R. Wait
A general Sommerfeld integral formulation is given for the electromagnetic (EM) fields of an oscillating vertical Magnetic or electric dipole over an electrically inhomogeneous thin sheet. The electrical properties of the sheet are characterized by a

Dielectric Properties of Materials for Packaging from 1 to 60 GHz

March 26, 2001
Author(s)
Y. Kantor, Michael D. Janezic, Pavel Kabos, Billy F. Riddle, James R. Baker-Jarvis
Measurements of the complex permittivity of commonly used packaging materials, as a function of temperature, in the frequency range of 1-60 GHz are presented. The results were obtained using a re-entrant cavity, a split cylinder cavity, a split post

Sublethal Effects of Smoke on Survival and Health

March 26, 2001
Author(s)
Richard G. Gann, Jason D. Averill, Kathryn M. Butler, Walter W. Jones, George W. Mulholland, J L. Neviaser, Thomas J. Ohlemiller, Richard D. Peacock, Paul A. Reneke, J R. Hall

Apparatus for Light Scattering Studies of Smoke Particles

March 25, 2001
Author(s)
George W. Mulholland, D W. Weinert
A facility for measuring the light scattered by smokes as a function of the scattering angle and linear polarization has been developed. By using monosize polystyrene calibration particles and filter collection for gravimeteric measurement, we are able for
Displaying 45901 - 45925 of 73994
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