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Displaying 42701 - 42725 of 73829

Real-Time Measurement of Spontaneous Antigen-Antibody Dissociation

October 1, 2002
Author(s)
S Kulin, Rani B. Kishore, Joseph B. Hubbard, Kristian Helmerson
We report observation of real-time adhesion between a monoclonal IgE antibody and its specific DNP antigen. Both molecules are immobilized on the surfaces of different polystyrene microspheres trapped by optical tweezers. Monitoring spontaneous, thermally

Research and Challenges of Multi-Scale Mechanics and Modeling

October 1, 2002
Author(s)
K P. Chong, Nicos Martys
One of the great challenges in the material sciences is to predict long term performance of materials and structures. Recent efforts have focused on linking nano/micro scalebehavior to meso-scale and macroscale behavior through computational modeling.In

Semifluorinated Aromatic Side-Group Polystyrene-Based Block Copolymers: Bulk Structure and Surface Orientation Studies

October 1, 2002
Author(s)
X Li, L Andruzzi, E Chiellini, Giancarlo Galli, Christopher K. Ober, A Hexemer, E K. Kramer, Daniel A. Fischer
Two families of narrow polydispersity poly(styrene)-based block copolymers bearing side groups containing both a phenyl ring and a para-linked semifluorinated side group were designed to produce stable low energy surfaces. The effects of the phenyl ring on

Smart and Designer Structural Material Systems

October 1, 2002
Author(s)
K P. Chong, Edward Garboczi
An efficient civil infrastructure system is essential to every country's productivity and quality of life. Basic research and development in smart structures and designer materials has shown great potential for enhancing the functionality, serviceability

Structural Study of an Unusual Cubic Pyrochlore Bi 1.5 Zn o.92 Nb 1.5 O 6.92

October 1, 2002
Author(s)
Igor Levin, T G. Amos, J Nino, Terrell A. Vanderah, C A. Randall, M T. Lanagan
Single-phase pyrochlore specimens of Bi 1.5Zn 0.92Nb 1.5O 6.92 were studied using combined electron, X-ray and neutron powder diffraction techniques. Rietveld refinements using neutron powder diffraction data confirmed an average pyrochlore structure A 2B

Superconformal Film Growth

October 1, 2002
Author(s)
Thomas P. Moffat, Daniel Wheeler, Daniel Josell
Superconformal electrodeposition of copper is explained by the recently developed curvature enhanced accelerator coverage (CEAC) mechanism. The model stipulates that 1. the growth velocity is proportional to the local accelerator, or catalyst, surface

Synthesis and Characterization of Colloidal Beta-HgS Quantum Dots

October 1, 2002
Author(s)
K A. Higginson, M Kuno, John E. Bonevich, S B. Qadri, M Yousuf, H Mattoussi
High-quality colloidal mercury sulfide quantum dots (QDs) are synthesized at room temperature using a synthetic strategy combining the effects of strongly binding Hg(II) ligands with a two-phase metal/chalcogen precursor compartmentalization scheme. This

Testing STEP-NC Implementations

October 1, 2002
Author(s)
Allison Barnard Feeney, Simon P. Frechette
STEP (STandard for the Exchange of Product model data, ISO 10303) data for numerical control, or STEP-NC, is intended to provide full product and process data interoperability between computer-aided manufacturing systems and machine tool controllers

The Development and Evolution of TREC and DUC

October 1, 2002
Author(s)
Donna K. Harman
The Text REtrieval Conference (TREC) has been running for 11 years now, with 93 participants in the last round of evaluation. This paper chronicles the changes in TREC over that time, emphasizing the evolution in the tasks that were evaluated rather than

The Environmental Life Cycle

October 1, 2002
Author(s)
Barbara C. Lippiatt
ES (Building for Environmental and Economic Sustainability) implements a rational, systematic technique for selecting environmentally and economically balanced building products. The technique is based on consensus standards and designed to be practical

The Existence of Precursor Soot in the Exhaust of Inverse Diffusion Flames

October 1, 2002
Author(s)
L G. Blevins, Robert A. Fletcher, Bruce A. Benner Jr, Eric B. Steel, George W. Mulholland
Knowledge of the chemical and physical structure of precursor soot is useful in the development of soot particle inception models. This paper examines the hypothesis that soot exiting an inverse flame is similar in chemical and morphological structure to

The Moisture Content of the Air in Equilibrium with Certain Desiccants

October 1, 2002
Author(s)
Peter H. Huang
The water vapor content of the air in equilibrium with various chemical desiccants at 28 C 1 C has been determined by using an advanced micro-sensor and measuring its electrical capacitance at a frequency of 20 kHz. The microsensor was calibrated against

The NIST Data Gateway: Providing Easy Access to NIST Data Resources

October 1, 2002
Author(s)
D M. Blakeslee, Angela Y. Lee, A J. Belsky
The National Institute of Standards and Technology (NIST) maintains a wide range of scientific and technical data resources, including free online data systems and PC databases available for purchase. However, many people are not familiar with these

The NIST Low Temperature ITS-90 Realization and Calibration Facilities

October 1, 2002
Author(s)
Christopher W. Meyer, Weston L. Tew
Two facilities have been constructed at NIST for realizing and maintaining the ITS-90 below 84 K. The first facility is an integrated low temperature realization system that realizes the ITS-90 below 84 K in its entirety and which we refer to as the Low

Thermal Modeling of Multiple-Line-Heat-Source Guarded Hot Plate Apparatus

October 1, 2002
Author(s)
William M. Healy, D R. Flynn
The National Institute of Standards and Technology is building an advanced-design guarded hot plate apparatus of advanced design to provide very accurate thermal transmission properties for specimens of thermal insulation 500 mm in diameter, with
Displaying 42701 - 42725 of 73829
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