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Search Publications

NIST Authors in Bold

Displaying 39101 - 39125 of 73697

Overview of the TREC 2003 Question Answering Track

March 1, 2004
Author(s)
Ellen M. Voorhees
The TREC 2003 question answering track contained two tasks, the passages task and the main task. In the passages task, systems returned a single text snippet in response to factoid questions; the evaluation metric was the number of snippets that contained

Overview of the TREC 2003 Robust Retrieval Track

March 1, 2004
Author(s)
Ellen M. Voorhees
The robust retrieval track is a new track in TREC 2003. The goal of the track is to improve the consistency of retrieval technology by focusing on poorly performing topics. In addition, the track brings back a classic, ad hoc retrieval task to TREC that

Pore Size Distributions in Low-k Dielectric Thin Films From SANS Porosimetry

March 1, 2004
Author(s)
R C. Hedden, V. J. Lee, Christopher L. Soles, Barry J. Bauer
A small-angle neutron scattering (SANS) porosimetry technique is presented for characterization of pore structure in nanoporous thin films. Porosimetry experiments are conducted using a contrast match solvent (a mixture of toluene-d8 and toluene-h8) having

Propagation Behavior of Machining Cracks in Delayed Fracture

March 1, 2004
Author(s)
Yasumitsu Matsuo, L K. Ives
The propagation behavior (subcritical crack growth) of machining induced cracks in silicon nitride was investigated by conducting constant stress (CS) and constant stress rate (CSR) tests. A dye impregnation technique that forces a palladium nitrate

Quartz capillary flow meter for gases

March 1, 2004
Author(s)
Robert F. Berg
This article describes an accurate meter for gas flow rates below 1000 micromol/s. (~1 micromol/s  1.3 cm3/min at 0 °C and 1 atm.) Two gauges measure the input and output pressures as the gas flows through a flow element consisting of either a single

Recent Developments in Producing Test-structures for Use as Critical Dimension Reference Materials

March 1, 2004
Author(s)
Richard A. Allen, Ravi I. Patel, Michael W. Cresswell, Christine E. Murabito, Brandon Park, Monica D. Edelstein, Loren W. Linholm
NIST is developing Single-Crystal Critical-Dimension Reference Materials (SCCDRM) which address the need of the semiconductor and semiconductor equipment industries for a well-characterized artifact to serve as the basis for comparing the performance of

Single-electron transistor spectroscopy of InGaAs self-assembled quantum dots

March 1, 2004
Author(s)
Kevin Osborn, Mark W. Keller, Richard Mirin
A single-electron transistor (SET) is used to detect tunneling of single electrons into individual InGaAs self-assembled quantum dots (QDs). By using an SET with a small island area and growing QDs with a low density we are able to distinguish and measure

Solid-Phase ATRP Synthesis of Peptide-Polymer Hybrids

March 1, 2004
Author(s)
Ying Mei, Kathryn L. Beers, H M. Byrd, David L. VanderHart, N. R. Washburn
A versatile methodology for preparing hybrid biomaterials by atom transfer radical polymerization from resin-supported peptides has been established. As an example, we have synthesized a GRGDS-functionalized poly(2-hydroxyethyl methacrylate). The peptide

Structural Collapse Fire Tests: Single Story, Wood Frame Structures

March 1, 2004
Author(s)
D W. Stroup, Nelson P. Bryner, James J. Lee, Jay A. McElroy, G Roadarmel, W H. Twilley
A series of fire tests were conducted in Phoenix, Arizona to develop data for evaluation of a methodology for predicting structural collapse. The fire test scenario was selected as part of a training video being prepared by the Phoenix, Arizona Fire

Studies of the Microstructure and Properties of Dense Ceramic Coatings Produced by High-Velocity Oxgen-Fuel Combustion Spraying

March 1, 2004
Author(s)
A Kulkarni, J Gutleber, S Sampath, A N. Goland, W B. Lindquist, H Herman, Andrew J. Allen, B A. Dowdy
High-velocity oxygen-fuel (HVOF) spraying stands out among the various processes to improve metal and ceramic coating density and surface characteristics. This paper explores microstructure development, coating characterization and properties of HVOF

Synthesis and Characterization of PEG and PEG Urethane Dimethacrylate Hydrogels

March 1, 2004
Author(s)
Sheng Lin-Gibson, S Bencherif, James A. Cooper, N. R. Washburn, Joseph M. Antonucci
A key area in the repair and regeneration of tissues is optimizing the polymeric scaffold-tissue response. This study is designated to better understand the relationships between polymer matrix structure and properties to cell response. The current study

Taming a Wild Workflow and Domesticating our Digital Data

March 1, 2004
Author(s)
Nancy Allmang, P J. Deutsch
This case study of a digital collection illustrates how the Information Services Division of Technology Services at NIST formulated a requirements analysis and development plan for a model system. The model knowledge management publications system

The First Industrial Fluid Properties Simulation Challenge

March 1, 2004
Author(s)
F Case, Anne M. Chaka, Daniel G. Friend, David Frurip, J Golab, R Johnson, J Moore, Raymond D. Mountain, J Olson, Martin Schiller, J Storer
The Industrial Fluid Properties Simulation Challenge [1] was established to promote the use of molecular simulation methods to predict industrially relevant materials properties. The organizing committee (the authors of this paper) also wished to establish
Displaying 39101 - 39125 of 73697
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