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Displaying 52151 - 52175 of 73893

Indentation of Ceramics with Spheres: A Century After Hertz

May 4, 1998
Author(s)
Brian R. Lawn
In this article we review the nature and mechanics of damage induced in ceramics by spherical indenters, from the classical studies of Hertz over a century ago to the present day. Basic descriptions of continuum elastic and elastic-plastic contact stress

The Far Infrared Spectrum of HOC1 Line Positions and Intensities

May 4, 1998
Author(s)
J.- M. Flaud, M Birk, G Wagner, J Orphal, S Klee, Walter J. Lafferty
The far infrared spectrum of HOC1 has been recorded at high resolution between 20 and 360 cm-1 by means of Fourier transform spectroscopy, and it was possible to observe pure rotation lines involving rotational levels with high Ka quantum numbers (up to Ka

A Comparison of Year 2000 Solutions

May 1, 1998
Author(s)
G E. Fisher
Not withstanding going out of business, retiring old systems, or replacing inadequate systems with commercial off-the-shelf systems, there are basically three techniques for solving the Year 2000 computer problem: 1) windowing, 2) encoding or encapsulation

A Fast Pulse Oscilloscope Calibration System

May 1, 1998
Author(s)
J. P. Deyst, Nicholas Paulter, T. Daboczi, Gerard N. Stenbakken, T. M. Souders
A system is described for calibrating high-bandwidth oscilloscopes using pulse signals. The fast pulse oscilloscope calibration system (FPOCS) is to be used to determine the step response parameters for digitizing oscilloscopes having bandwidths of 20 GHz

A Fast Pulse Oscilloscope Calibration System

May 1, 1998
Author(s)
J. P. Deyst, Nicholas Paulter, T. Daboczi, Gerard N. Stenbakken, T. M. Souders
A system is described for calibrating high-bandwidth oscilloscopes using pulse signals. The fast pulse oscilloscope calibration system (FPOCS) is to be used to determine the step response parameters for digitizing oscilloscopes having bandwidths of 20 GHz

A Nonlinear Fluid Standard Reference Material: Progress Report

May 1, 1998
Author(s)
Carl R. Schultesiz, G B. McKenna
NIST is in the process of developing a new Standard Reference Material that replaces the previous SRM 1490 Nonlinear Fluid Standard. The purpose of the material and its development is two-fold: first, to help equipment manufacturers and researchers in

A Pulse Measurement Intercomparison

May 1, 1998
Author(s)
T. M. Souders, J R. Andrews, A. Caravone, J. P. Deyst, C. Duff, S. Naboicheck
A pulse measurement intercomparison, organized by (NIST) and conducted by the authors in their respective labs, is described. The purpose was to assess the state of the art for time-domain pulse-waveform measurements in the nanosecond regime, and to find

An Infrared Study of H 8 Si 8 O 12 Cluster Adsorption on Si (100) Surfaces

May 1, 1998
Author(s)
J Eng, Krishnan Raghavachari, L M. Struck, Y J. Chabal, B E. Bent, M M. Banaszak-Holl, F R. McFeely, A M. Michaels, G W. Flynn, S B. Christman, E E. Chaban, G P. Williams, K Radermacher, S Mantl
Motivated by an ongoing controversy regarding the proper interpretation of x-ray photoelectron spectra of Si/SiO 2 interfaces derived from the adsorption of H 8Si 8O 12 spherosiloxane clusters on Si(100) surfaces, we have studied the adsorption geometry of

Atomic Hydrogen for the Formation of Abrupt Sb Doping Profiles in MBE-Grown Si

May 1, 1998
Author(s)
P E. Thompson, C Silvestre, M E. Twigg, G Jernigan, David S. Simons
Previously atomic hydrogen has been shown to be effective in reducing the segregation of Ge on Si[100] during solid source molecular beam epitaxygrowth. In this work we have investigated atomic hydrogen to determine if it is equally effective in reducing

Auditory Nerve Fiber Modeling: A Stochastic Melnikov Approach.

May 1, 1998
Author(s)
Marek Franaszek, Emil Simiu
Well-known experiments have established two basic features of auditory nerve fiber dynamics. First, harmonic excitation with constant amplitude produces mean firing rates that are largest for excitation frequencies contained in a relatively narrow best

Characterization of Broad-Band Transmission for Coplanar Waveguides on CMOS Silicon Substrates

May 1, 1998
Author(s)
V. Milanovic, Mehmet Ozgur, Donald C. DeGroot, Jeffrey Jargon, Michael Gaitan, Mona E. Zaghloul
This paper presents characteristics of microwave transmission in coplanar waveguides (CPW's) on silicon (Si) substrates fabricated through commercial CMOS foundries. Due to the CMOS fabrication, the metal strips of the CPW are encapsulated in thin films of
Displaying 52151 - 52175 of 73893
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