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Search Publications

NIST Authors in Bold

Displaying 35576 - 35600 of 73697

Whisker & Hillock Formation on Sn, Sn-Cu and Sn-Pb Electrodeposits

November 11, 2005
Author(s)
William J. Boettinger, C E. Johnson, Leonid A. Bendersky, Kil-Won Moon, Maureen E. Williams, Gery R. Stafford
Bright Sn, Sn-Cu and Sn-Pb layers, 3, 7 and 16 mm thick were electrodeposited on phosphor bronze cantilever beams in a rotating disk apparatus. Over a period of several days, Sn-Cu deposits develop 50 mm contorted hillocks and 200 mm whiskers, pure Sn

Terahertz Spectroscopy of Solid Serine and Cysteine

November 10, 2005
Author(s)
Timothy M. Korter, M B. Campbell, M C. Beard, Edwin J. Heilweil
Terahertz (THz) absorption spectra of the amino acids L-serine and L-cysteine in teh solid phase at 77K and 298 K are reported and compared to vibrational spectral results from Density Functional Theory for these species.

Statistical Aspects of Linkage Analysis in Interlaboratory Studies

November 9, 2005
Author(s)
W Strawderman, Andrew L. Rukhin
This paper investigates issues that arise in statistical inference in interlaboratory studies known as Key Comparisons when one has to link several comparisons to or through existing studies. A new approach to the analysis of such a data is proposed using

Low-frequency phase locking in high-inductance superconductng nanowires

November 8, 2005
Author(s)
Robert Hadfield, Aaron J. Miller, Sae Woo Nam, Richard L. Kautz, Robert E. Schwall
Niobium nitride nanowires show considerable promise as high-speed single-photon detectors. We report the observation of an anomalous low-frequency ($\sim10$MHz) response in long, superconducting NbN nanowires (100nm wide, 4nm thick, and $500\mu$m long)

Heat Transfer Issues in Cryogenic Catheters

November 7, 2005
Author(s)
Ray Radebaugh
Catheters with diameters of 3 mm or smaller are capable of accessing many internal organs through arteries and veins. They provide the medical community with tools to operate on internal organs without the need to cut through the body to gain access. As a

Reversible axial-strain effect in Y-Ba-Cu-O coated conductors

November 7, 2005
Author(s)
Najib Cheggour, John (Jack) W. Ekin, C. L. H. Thieme, Y Y. Xie, V Selvamanickam, Ron Feenstra
The recently discovered reversible strain effect in Y-Ba-Cu-O (YBCO) coated conductors contrasts with the general understanding that the effect of strain on critical-current density J c in practical high-temperature superconductors is determined only by

Packaging of In-Plane Micro-Actuators for BioMEMS Applications

November 5, 2005
Author(s)
Hrishikesh V. Panchawagh, David Serrell, Faheem F. Faheem, Cari F. Herrmann, Dudley Finch, Roop L. Mahajan
Two issues related to actuation of in-plane, electro-thermal actuators for BioMEMS applications are addressed. First, a packaging solution to protect the actuator from biological debris and particulates by encapsulating the actuator with a cap using flip

Rheology Measurement of Fresh concrete With a Mixing Truck

November 2, 2005
Author(s)
S Amziane, Chiara C. Ferraris, E Koehler
The main objective of this study is to evaluate the workability of fresh portland cement concrete while it is still in the mixing truck by determining fundamental rheological parameters (plastic viscosity and yield stress). Nine concrete mixtures with

Advanced Metrology Needs for Nanotechnology and Nanomanufacturing

November 1, 2005
Author(s)
Michael T. Postek, John S. Villarrubia, Andras Vladar
Advances in fundamental nanoscience, design of nanomaterials, and ultimately manufacturing of nanometer scale products all depend to some degree on the capability to accurately and reproducibly measure dimensions, properties, and performance

An Evaluation of Ultra Wideband Technology for Indoor Ranging

November 1, 2005
Author(s)
Camillo Gentile, El Kik
Ultra wideband technology shows promise for precision ranging due to its fine time resolution to resolve multipath fading and the presence of lower frequencies in the baseband to penetrate walls. While a concerted effort has been conducted in the

Analyzing Carbon Fiber Composite Materials with Equivalent Layer

November 1, 2005
Author(s)
Christopher L. Holloway, M. S. Sarto, Martin Johansson
The purpose of this paper is toinvestigate the use of effective layer models for the analysis of carbon fiber composite materials. In this paper, we present three different models for the electromagnetic characterization (effective material properties) of

Automation of Bridge Fabrication and Rapid Repair

November 1, 2005
Author(s)
Thomas A. Siewert, Krishna Verma Verma, Stuart Chen
Over the past 6 years, the Federal Highway Administration (FHWA) Office of Bridge Technology has been working with other government agencies and industry groups to speed the fabrication and repair of bridges, while simultaneously reducing the costs. This
Displaying 35576 - 35600 of 73697
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