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Displaying records 681 to 690 of 722 records.
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681. 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

682. 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

683. 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

684. 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

685. 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

686. 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

687. 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

688. 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

689. 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

690. Transient Green's Tensor for a Layered Solid Half-Space With Different Interface Conditions
Series: Journal of Research (NIST JRES)
Topic: Electronics & Telecommunications
Published: 9/1/2002
Authors: S C Ren, Nelson N. Hsu, Donald G Eitzen
Abstract: Pulsed ultrasonic techniques can be and have been used to examine the interface conditions of a bonded structure. To provide a theoretical base for such testing techniques we model the structure as a layer on top of a half-space, both of different e ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=823307



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