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Displaying 42576 - 42600 of 73960

Enthalpies of Formation of SrPbO 3 and Sr 2 PbO 4

December 1, 2002
Author(s)
R Klein, Lawrence P. Cook, Winnie K. Wong-Ng
Alkaline-earth plumbates are important accessory phases in (Bi,Pb)-Sr-Ca-Cu-O (BSCCO) high temperature superconductor materials. Reliable values for standard enthalpies of formation (D f H o) of the plumbates are therefore an essential part of the BSCCO

External Laser Stabilization

December 1, 2002
Author(s)
John L. Hall
The summary of this epoch is two fold: first there now are real professional tools such as SimuLink that allow one to study electronic and other control systems. But the particular chips chosen, while fast, were new and quite tweeky, and prone to

Extinction of Cup-Burner Diffusion Flames by Catalytic and Inert Inhibitors

December 1, 2002
Author(s)
Gregory T. Linteris
The first tests of super-effective flame inhibitors blended with CO2 have been performed in methane-air co-flow diffusion flames. Although the organometallic agents used are typically one or two orders of magnitude more effective inhibitors than CF3Br when

Fire Safety of Passenger Trains, Phase II: Application of Fire Hazard Analysis Techniques

December 1, 2002
Author(s)
Richard D. Peacock, Paul A. Reneke, Jason D. Averill, Richard W. Bukowski, J H. Klote
As part of the passenger equipment rulemaking required by Congress, the Federal Railroad Adminstration (FRA) has issued new requirements making its existing fire safety guidelines mandatory. Part of this fire safety rule requires fire hazard analyses for

From Model to Markup: XML Representation of Product Data

December 1, 2002
Author(s)
Joshua Lubell
Business-to-consumer and business-to-business applications based on the Extensible Markup Language (XML) tend to lack a rigorous description of product data, the information generated about a product during its design, manufacture, use, maintenance, and

Future of Fire Simulation

December 1, 2002
Author(s)
Kevin B. McGrattan, Howard R. Baum, Ronald G. Rehm, Glenn P. Forney, Kuldeep R. Prasad
Scientists and engineers are often asked to make predictions of the state of technology in the future and are usually laughably wrong. The best prognosticators get the trends right, but cannot possibly fill in the details. Think of Jules Verne predicting a

High Precision Measurement of Reflectance for Films Under Substrates

December 1, 2002
Author(s)
Xiao Tang, Jian Zheng
A more accurate methodology to measure the reflectance of optical disks, taking into consideration the scattering losses at the surfaces of the disk, is proposed by the National Institute of Standards and Technology (NIST). The proposed method is a

High-Speed Quantum Communication Testbed

December 1, 2002
Author(s)
Carl J. Williams, Xiao Tang, M Hiekkero, J Rouzard, R Lu, A Goedecke, Alan L. Migdall, Alan Mink, Anastase Nakassis, Leticia S. Pibida
We describe the current status of the NIST Quantum Communication Testbed (QCT) facility. QCT is a facility for exploring quantum communication in an enviornment similar to that projected for early commercial implementations: quantum cryptographic key

Hole Growth Instability in the Dewetting of Evaporating Polymer Solution Films

December 1, 2002
Author(s)
Xiaohong Gu, D T. Raghavan, Jack F. Douglas, Alamgir Karim
We investigate the dewetting of aqueous, evaporating polymer [poly(acrylic acid)] solutions cast on hydrophobic (polystyrene) substrates. As with typical dewetting, the evaporating films initially break up through the nucleation of holes that perforate the

Information: A Key to Supply Chain Performance

December 1, 2002
Author(s)
Albert W. Jones, Larry H. Reeker, A S. Deshmukh
This paper makes serveral critical points related to the intrinsic nature of the relationship between information and performance in supply chains. It highlights the co-dependence of information and supply-chain management decisions, stresses the impact of

Intensity Effects in Ultracold Photoassociation Line Shapes

December 1, 2002
Author(s)
A Simoni, Paul S. Julienne, Eite Tiesinga, Carl J. Williams
We derive ultracold atom-atom photoassociation line shapes valid for intense light fields and investigate laser power effects in sodium and rubidium photoassociation to the purely long range 0g- symmetry state. We consider intensities up to few hundreds W

Interleaved, Sampled Fiber Bragg Gratings for use in Hybrid Wavelength References

December 1, 2002
Author(s)
Michael W. Rabin, William C. Swann, Sarah L. Gilbert
We discuss the design and fabrication of interleaved, sampled fiber Bragg gratings (ISFBGs) for use in hybrid wavelength calibration references covering the 1300 nm to 1600 nm region. We demonstrate use of sampled phase masks (SPMs) to make sampled

Isopiestic Determination of the Osmotic and Activity Coefficients of K 2 SO 4 (aq) at the Temperatures 298.15 and 323.15 K, and Revision of the Thermodynamic Properties of the K 2 SO 4 + H 2 O System

December 1, 2002
Author(s)
D A. Palmer, Donald G. Archer, J A. Rard
Isopiestic vapor-pressure measurements were made for K 2SO 4(aq) from 0.228 to 0.740 mol .kg -1 at 298.15 k and from 0.219 to 0.957 mol .kg -1 at 323.15 K, using NaCl(aq) as the isopiestic reference standard. These isopiestic measurements extend to

Large Area, Ultra-high Voltage 4H-SiC PiN Rectifiers

December 1, 2002
Author(s)
Ranbir Singh, Kenneth G. Irvine, D C. Capell, James Richmond, David W. Berning, Allen R. Hefner Jr., John W. Palmour
This paper reports the design, fabrication, and high temperature characteristics of 1 mm 2, 4 mm 2, and 9 mm 2 4H-SiC rectifiers with 6 kV, 5 kV, and 10 kV blocking voltage respectively. These results were obtained from two lots in an effort to increase
Displaying 42576 - 42600 of 73960
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