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Displaying records 701 to 710 of 743 records.
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701. Time and Polarization Resolved Ultrasonic Testing of Materials
Topic: Electronics & Telecommunications
Published: 1/1/1996
Authors: Gerald V. Blessing, D Xiang, Nelson N. Hsu
Abstract: We have developed a transducer which allows the benefits of Line Focus Beam (LFB) acoustic microscopy to be realized over large areas, using a conventional pulser-receiver. Experimental evidence is presented to show that the transducer is correctly ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820040

702. Time-Resolved Line Focus Acoustic Microscopy of Composites
Topic: Electronics & Telecommunications
Published: 6/1/1999
Author: Nelson N. Hsu
Abstract: Acoustic microscopy has been used to measure material properties since the 1980s. The velocity of the leaky surface wave can be accurately determined from the V(z) curve which is formed by the interference between the leaky surface wave and specular ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=821935

703. Time-Resolved Ultrasonic Body Wave Measurements of Material Anisotropy Using a Lensless Line-Focus Transducer
Topic: Electronics & Telecommunications
Published: 11/1/1998
Authors: Nelson N. Hsu, D Xiang, Gerald V. Blessing
Abstract: For plate-like sample geometries, a line-focus transducer can be used to detect back-reflected echoes through the thickness of the sample. The interaction of the convergent cylindrically focused probing wave with the material anisotropy produces mul ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823262

704. Time-Resolved Ultrasonic Body Wave Measurements of Materials Anisotropy Using a Lensless Line-Focus Transducer
Topic: Electronics & Telecommunications
Published: 3/30/1999
Authors: Nelson N. Hsu, Gerald V. Blessing, D Xiang
Abstract: For plate-like sample geometries, a line-focus transducer can be used to detect back-reflected echoes through the thickness of the sample. The interaction of the convergent cylindrically focused probing wave with the material anisotropy produces mult ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820063

705. Time-and-Polarization-Resolved Acoustic Microscopy of Surface and Subsurface Cracks
Topic: Electronics & Telecommunications
Published: 12/1/1999
Authors: D Xiang, Gerald V. Blessing, Nelson N. Hsu
Abstract: Time-and-polarization-resolved acoustic microscopy with an improved-spatial-resolution line-focus transducer of simply reduced active element width is applied to characterize surface and subsurface cracks. From acoustic images obtained from scanning ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=821932

706. Time-resolved Balmer-alpha Emission from Fast Hydrogen Atoms in Low Pressure, Radio-Frequency Discharges in Hydrogen
Topic: Electronics & Telecommunications
Published: 5/1/1995
Authors: S. B. Radovanov, Krzysztof Dzierzega, J R Roberts, James K Olthoff
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=2388

707. Time-resolved Measurements of Ion Energy Distributions and Optical Emissions in Pulsed Radio-Frequency Discharges
Topic: Electronics & Telecommunications
Published: 3/1/2000
Authors: Yicheng Wang, Eric C Benck, Martin Misakian, M. Edamura, James K Olthoff
Abstract: In pulse-modulated inductively coupled plasmas generated in CF^d4^:Ar mixtures, a transition between a capacitive coupling mode (E mode) and an inductive coupling mode (H mode) was observed. For a pulsed plasma in a 50%CF^d4^:50%Ar volume mixture wi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=9483

708. Total Electron Scattering Cross Section for Cl^d2^
Topic: Electronics & Telecommunications
Published: 1/1/1999
Authors: Gary D. Cooper, Jason E. Sanabia, J. H. Moore, James K Olthoff, Loucas G. Christophorou
Abstract: Absolute measurements of the total electron scattering cross section for chlorine, Cl2, are reported for electron energies ranging from .3 eV to 23 eV. The present data are in reasonable agreement with previous measurements of the cross sections for ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=2608

709. Traceability for Aerosol Electrometer in the fA Range
Topic: Electronics & Telecommunications
Published: 6/1/2013
Authors: Dean G Jarrett, Miles Owen
Abstract: Described here are the configurations and procedures used to provide traceability to electrical standards for an aerosol electrometer calibration in the range ± 20 fA to ± 40 fA. The technique used here simulated the condition of a current induced ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913213

710. Transient Analysis of a Line-focus Transducer Probing a Liquid/Solid Interface
Topic: Electronics & Telecommunications
Published: 1/1/1995
Authors: Nelson N. Hsu, Gerald V. Blessing, Steven Earl Fick, D Xiang
Abstract: The use of a line-focus transducer operating in pulse-echo mode to probe a liquid/solid interface is a new technique which has many engineering applications. To provide a theoretical basis for multi-echo analysis and interpretation, we use numerical ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=820041



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