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Displaying 42976 - 43000 of 73779

The N 13 , N 5 + N 15 and N 9 + N 15 Bands of 10 B 2 H 6

August 1, 2002
Author(s)
Walter J. Lafferty, J.- M. Flaud, H Berger, G Pawelke
The 5 m absorption region of an isotopically pure sample of diborane 10B 2H 6 has been analyzed using high resolution (0.0025 cm -1) Fourier transform spectra. A set of precise experimental rotational-vibrational energy levels has been obtained for three

The Nature and Origin of Tribochemistry

August 1, 2002
Author(s)
Stephen M. Hsu, J Zhang, Z Yin
The origin of tribochemistry is from the rubbing of surfaces together. The precise nature of the chemical reactions and the driving force behind the reactions are not known except for a few simple chemical systems. In boundary lubrication, it is difficult

Three-Layer Model for Exchange Anisotropy

August 1, 2002
Author(s)
S M. Rezende, A Azevedo, F M. de Aguiar, J R. Fermin, William F. Egelhoff Jr., Sean R. Parkin
Recent x-ray absorption measurements have indicated that the interface between the antiferromagnetic (AF) and the ferromagnetic (FM) layers in AF/FM bilayers instead of being abrupt, consists of a thin layer with uncompensated spins. Here the effect of an

Time Domain Observation of the Lorentz-Local Field

August 1, 2002
Author(s)
Steven T. Cundiff
The Lorentz local field in a dense atomic vapor is observed using transient-four-wave-mixing, a time domain spectroscopic technique. The local field is manifest as a signal for negative delay. The strength of the negative delay signal can be related to the

Ultra-Thin Aluminum Oxide as a Thermal Oxidation Barrier on Metal Films

August 1, 2002
Author(s)
L Gan, Romel Gomez, Audie M. Castillo, P J. Chen, Cedric J. Powell, William F. Egelhoff Jr.
We have investigated the role of aluminum oxide films as barriers to thermal oxidation of Co, Ni, Fe, NiFe, Mn, Ta, Cu Al and Cr in air. The oxidation of the film is monitored by measuring the electrical resistance following a brief anneal in air. We find

Using a Localized Fluorescent Dye to Probe the Glass/Resin Interphase

August 1, 2002
Author(s)
Joseph~undefined~undefined~undefined~undefined~undefined Lenhart, J H. VanZanten, Joy Dunkers, Richard~undefined~undefined~undefined~undefined~undefined Parnas
A novel technique has been developed to study the chemistry of buried polymer substrate interfacial regions by localizing a fluorescent probe to the substrate surface. Epoxy functional multi-layers of silane coupling agents were deposited on glass and

Virial Coefficients of Pure Gases

August 1, 2002
Author(s)
J H. Dymond, K N. Marsh, R C. Wilhoit, K C. Wong, Michael D. Frenkel
This critical compilation of virial coefficients of pure gases is a sequel to The Virial Coefficients of Pure Gases and Mixtures, by J.H. Dymond and E.B. Smith (Oxford University Press, 1979). This new and enlarged edition was prepared from the virial

Virtual Reality Simulation of a Mechanical Assembly Production Line

August 1, 2002
Author(s)
Deogratias Kibira, Charles R. McLean
This paper presents our work on the application of virtual reality simulation to the design of a production line for a mechanically assembled product. The development of this simulation was undertaken as a part of the Manufacturing Simulation and

Structural Basis of Thermostability: Analysis of Stabilizing Mutations in Subtilisin BPN

July 26, 2002
Author(s)
O Almog, David Travis Gallagher, Jane E. Ladner, S Strausberg, Patrick Alexander, Phillip Bryan, G L. Gilliland
The crystal structures of two thermally stabilized subtilisin BPN' variants, S63 and S88, are reported here at 1.8 and 1.9 resolution, respectively. The micromolar affinity calcium-binding site (site A) has been deleted (δ 75-83) in these variants

A Model of Opposed Flow Flame Spread Over Charring Materials

July 25, 2002
Author(s)
A A. Atreya, Howard R. Baum
This paper presents a theoretical decsription of a diffusion flame spreading against the wind on a semi-infinite charring solid. It extends the previous flame spread models on vaporizing solids to charring materials like wood and provides a more realistic

Large Eddy Simulation of Buoyant Turbulent Pool Fires

July 25, 2002
Author(s)
J Gore, Kevin B. McGrattan, Ronald G. Rehm, Howard R. Baum
Three dimensional large eddy simulations (LES) of two buoyant flows were performed n conjunction with a Smagorinsky turbulence model. The flows included a non-reacting helium plume previously simulated with two-dimensional simulations and a methane/air

Raman Gain: Pump-wavelength Dependence in the Single-Mode Fiber

July 15, 2002
Author(s)
Nathan R. Newbury
The magnitude of the stimulated Raman gain spectrum will depend on the absolute pump wavelength. Measurements of the pump-wavelength scaling of the stimulated Raman gain of several single-mode fibers are presented. The measurements were obtained by use of

X-Ray Spectroscopy and Calibrations in the 50 eV to 60 keV Range

July 11, 2002
Author(s)
J Seely, Lawrence T. Hudson, J. Weaver, G Holland, C N. Boyer
Spectrometers have been developed to record x-ray spectra in the energy range 50 eV to 60 keV. The dispersion elements are transmission crystals for energies higher than approximately 10 keV, reflection crystals for 1 keV to 20 keV and transmission
Displaying 42976 - 43000 of 73779
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