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Displaying 45626 - 45650 of 73697

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

Particle Image Velocimetry in Flickering Methane/Air Diffusion Flames

March 25, 2001
Author(s)
G Papadopoulos, Rodney A. Bryant, William M. Pitts
Phase-resolved measurements of the velocity field in acoustically forced, flickering laminar co-flowing methane/air diffusion flames have been made. Identical flames have been studied extensively in the past in order to characterize the effects of the

Thermal Agent Extinguishment of Two Types of Diffusion Flames

March 25, 2001
Author(s)
William M. Pitts, Rodney A. Bryant, Jiann C. Yang
The extinguishment of diffusion flames on two types of burners-an opposed-flow Tsuji burner and an axisymmetric burner with a surrounding coflow-by thermal agents has been investigated. Thermal agents are those that act primarily by extracting heat and

The 103rd Annual Meeting of the American Ceramic Society

March 19, 2001
Author(s)
Winnie K. Wong-Ng
The American Ceramic Society 103rd annual meeting & exposition took place from April 22-25, 2001, at the Indiana Convention Center and RCA Dome of Indianapolis. The meeting was well attended - with approximately 2700 attendees including many from other

Toxic Hazard of Building Products and Furnishings

March 14, 2001
Author(s)
Richard G. Gann
Since it was recognized nearly 30 years ago that most fire victims succumb to smoke, there has been a broad effort to include consideration of smoke toxicity in fire standards and code provisions. Research has made great advances in this area, progressing

Nanomechanical Measurements of Polymeric Systems

March 13, 2001
Author(s)
Mark R. VanLandingham, Christopher C. White, Xiaohong Gu, Tinh Nguyen
Durability, in terms of service life, is often related to the failure due to service conditions of an unacceptable percentage of a product population. In many cases, this percentage is much less than 1 %, and thus the factors affecting early times-to

Phase Diagrams of High Tc Superconductors

March 13, 2001
Author(s)
Winnie K. Wong-Ng
The aim of this chapter is to provide selected experimental phase diagrams of high Tc superconductors to represent various active systems of research. Among current systems, the BaO-Y 2O 3-CuO (BYC), BaO-R 2O 3-CuO (BRC), and BSCCO systems have been
Displaying 45626 - 45650 of 73697
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