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Displaying 46476 - 46500 of 74256

Bulk-Moduli Systematics in Oxides Including Superconductors

January 5, 2001
Author(s)
H M. Ledbetter, Sudook A. Kim
For oxides, including superconductors, we consider the systematics of the bulk-modulus/atomic-volume (B/V a) relationship. For nonsuperconducting oxides, the B-V a diagram shows that most oxides fall in three sets: (1) rocksalt crystal structure, AO; (2)

Elastic Constants of Porous Ceramics

January 5, 2001
Author(s)
H M. Ledbetter, M Lei, S K. Datta
Using theoretical models, we consider the elastic constants of ceramics containing proes. As an example, we consider alumina. However, the approach applies to all ceramics. As a point of departure, we consider spherical pores. For all the usual elastic

Elastic Gr neisen Parameters of Cubic Elements and Compounds

January 5, 2001
Author(s)
H M. Ledbetter, Sudook A. Kim
From a material's second-order elastic-stiffness coefficients C ijkl and its third-order elastic-stiffness coefficients C ijklmn, we calculated the scalar dimensionless Gr neisen parameter γ, the single most important property of an anharmonic solid. We

Interactive Training Through Knowledge Navigation

January 5, 2001
Author(s)
Howard T. Moncarz
This paper describes the initiation of our project to study three-dimensional navigation through manufacturing knowledge domains suitable for training. In summary we are organizing and representing knowledge from the NIST Manufacturing Engineering

An HLLC-Type Approximate Riemann Solver for Ideal Magnetohydrodynamics

January 2, 2001
Author(s)
Katharine F. Gurski
This paper presents a new solver based on the HLLC (Harten-Lax-van Leer-contact wave) approximate nonlinear Riemann solver for gas dynamics for the ideal magnetohydrodynamics (MHD) equations written in conservation form. It is shown how this solver also

'Supercritical Water' Density Effects on the Rate of Isopropanol Dehydration

January 1, 2001
Author(s)
V I. Anikeev, Jeffrey A. Manion, A Ermakova
A new experimental procedure for studying the kinetics and thermodynamics of chemical reactions in supercritical fluids-solvents was suggested. The kinetics and mechanism of the dehydration of 2-propanol in supercritical water in a closed reactor were

A Careful Consideration of the Calibration Concept

January 1, 2001
Author(s)
Steven D. Phillips, William T. Estler, Theodore D. Doiron, K Eberhardt, M. Levenson
This paper is a detailed discussion of the technical aspects of the calibration process with emphasis on the definition of the measurand, the conditions under which the calibration results are valid, and the subsequent use of the calibration results in

A Comparison of Quantum-Mechanical Capacitance-Voltage Simulators

January 1, 2001
Author(s)
Curt A. Richter, Allen R. Hefner Jr., Eric M. Vogel
We have systematically compared the results of an extensive ensemble of the most advanced available quantum-mechanical capacitance-voltage simulation and analysis packages for a range of metal-oxide-semiconductor device parameters. While all have similar
Displaying 46476 - 46500 of 74256
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