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Displaying 45801 - 45825 of 73929

International Standards for Design Life of Constructed Assets

April 1, 2001
Author(s)
C Sjostrom, P Jernberg, G J. Frohnsdorff
In 1993, a working group aimed at developing standards for design life was established in ISO Technical Committee TC59, Building Construction. The working group was later elevated to subcommittee status as ISO/TC59/SC14 - Design Life. The purpose of the

Java and Numerical Computing

April 1, 2001
Author(s)
Ronald F. Boisvert, J Moreira, M Philippsen, Roldan Pozo
We discuss the advantages and disadvantages of using Java for numerical computing. We provide examples of current performance levels and propose several additional language features that would make Java more easily applied in scientific applications.

Low Thermal Conductivity Vapor Deposited Zirconia Microstructures

April 1, 2001
Author(s)
D D. Hass, Andrew Slifka, H N. Wadley
Low thermal conductivity yttria stabilized zirconia (YSZ) coatings have been grown using a low vacuum (0.20 Torr) electron beam directed vapor deposition process. In this approach, a transsonic helium jet was used to entrain and transport an evaporated YSZ

Magnetic Switch for Integrated Atom Optics

April 1, 2001
Author(s)
D Mueller, Eric A. Cornell, M Prevedelli, P Schwindt, Y J. Wang, D Z. Anderson
A magnetic waveguide structure allows switching of neutral atoms between two guides. The switch consists of lithographically patterned current-carry-carrying wires on a sapphire substrate. By selectively sending current through a particular set of wires

Making MALDI-TOF-MS an Absolute Method for Determination of the MMD of Polymers

April 1, 2001
Author(s)
Charles M. Guttman, William R. Blair, S Wetzel
In 1963, Donald McIntyre of the NBS Polymers Division produced the first polymer molecular mass standards to be issued by NBS as Standard Reference Materials (SRM), SRM 705. The appearance of this SRM marked the beginning of a long and continuing tradition

Mass Spectrometry of Spin-On-Glass Low-K Dielectric Precursors

April 1, 2001
Author(s)
William E. Wallace, Kathleen M. Flynn, Joseph M. Antonucci
The degree-of-intramolecular-condensation, defined as the number of residual silanol (SiOH) groups per oligomer, for a variety of silsesquioxane polymers was measured by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. Reaction

NIST Research on Structural Performance of Housing Systems

April 1, 2001
Author(s)
Fahim Sadek, Michael A. Riley
An outline of NIST research in the area of structural performance of housing systems is presented in this paper. The performance of wood-frame houses in past earthquakes and hur-ricanes is summarized, and the state-of-the-art in experimental and analytical

Porous Thin Films for Thermal Barrier Coatings

April 1, 2001
Author(s)
K D. Harris, D Vick, E J. Gonzalez, T Smy, K Robbie, M J. Brett
A new approach is described in the deposition of thin films for thermal barrier applications. In a physical vapour deposition experiment, extreme shadowing, present only at highly oblique flux/substrate angles, was employed to introduce porosity into thin

Premixed Flame Inhibition by Manganese and Tin Compounds

April 1, 2001
Author(s)
Gregory T. Linteris, Vadim D. Knyazev, Valeri I. Babushok
In this work we presented the first experimental measurements of influence of manganese- and tin-containing compounds (MMT, TMT0 on burning velocity of methane/air flames. We have also developed kinetic models describing the inhibition mechanisms
Displaying 45801 - 45825 of 73929
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