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Displaying 23901 - 23925 of 73994

Predictive Gold Nanocluster Formation Controlled by Metal-Ligand Complexes

January 9, 2012
Author(s)
John M. Pettibone, Jeffrey W. Hudgens
The formation of ligand-protected transition metal nanoclusters in size-selective syntheses is driven by the inherent properties of the protecting ligands. We have previously reported the selective, monodisperse product formation of phosphine protected Au

Recommendations for Elevator Messaging Strategies

January 6, 2012
Author(s)
Erica D. Kuligowski, Bryan L. Hoskins
Building occupants, who have been instructed to use elevators for evacuation, and have subsequently congregated within the elevator lobby for eventual evacuation, are presented with an uncertain and potentially intimidating situation. For example, waiting

NIST Time and Frequency Bulletin

January 5, 2012
Author(s)
Petrina C. Potts
The Time and Frequency Bulletin provides information on performance of time scales and a varieth of broadcasts (and related information) to users of the NIST services.

Simulation of the Dynamics of a Wind-Driven Fire in a Ranch-Style House - Texas

January 5, 2012
Author(s)
Adam M. Barowy, Daniel M. Madrzykowski
This report describes the results of calculations using the NIST Fire Dynamics Simulator (FDS) performed to provide insight on the thermal conditions that may have occurred during a wind-driven fire in a one-story ranch house on April 12, 2009 in Houston

Coverage-Dependent Morphology of PEGylated Lysozyme Layers Adsorbed on Silica

January 4, 2012
Author(s)
Sheetal S. Pai, Frank Heinrich, Adam L. Canady, Todd M. Przybycien, Robert D. Tilton
Neutron reflection was used to characterize the adsorbed layer structure for lysozyme conjugated at the N-terminus with a single perdeuterated methoxy poly(ethylene glycol) chain at the silica/water interface. Adsorbed layers were produced with two

Calibrated nanoscale dopant profiling using a scanning microwave microscope.

January 3, 2012
Author(s)
Pavel Kabos, Thomas M. Wallis, H P. Hubner, I. Humer, M. Hochleitner, M. Fenner, M. Moertelmaier, C. Rankl, Atif A. Imtiaz, H. Tanbakuchi, P. Hinterdorfer, J. Smoliner, Joseph J. Kopanski, F. Kienberger
The scanning microwave microscope (SMM) is used for calibrated capacitance spectroscopy and spatially resolved dopant profiling measurements. It consists of an atomic force microscope (AFM) combined with a vector network analyzer operating between 1-20 GHz

Controlling the Self-Assembly of Metal-Seamed Organic Nanocapsules

January 3, 2012
Author(s)
Harshita Kumari, Andrew V. Mossine, Steven R. Kline, Cindi L. Dennis, Drew A. Fowler, Simon J. Teat, Charles L. Barnes, Carol A. Deakyne, Jerry L. Atwood
Puzzling out the intricacies associated with formation of supramolecular structures provides insight into and control of the self-assembly process. Such control may allow tailoring of these structures for specific applications. Herein we report the results

FIRE PATTERN REPEATABILITY: A STUDY IN UNCERTAINTY

January 3, 2012
Author(s)
Daniel M. Madrzykowski, Charles Fleischmann
The National Institute of Standards and Technology (NIST) is conducting a multi-year study, with the support of the National Institute of Justice (NIJ) and the NIST Office of Law Enforcement Standards (OLES), to examine the repeatability of burn patterns

MICROHOTPLATE TEMPERATURE SENSOR CALIBRATION AND BIST

January 3, 2012
Author(s)
Muhammad Y. Afridi, Christopher B. Montgomery, Stephen Semancik, Kenneth G. Kreider, Jon C. Geist
In this paper we describe a novel long-term microhotplate temperature sensor calibration technique suitable for Built-In Self Test (BIST). The microhotplate thermal resistance (thermal efficiency) and the thermal voltage from an integrated platinum-rhodium

Theoretical optical and x-ray spectra of liquid and solid H2O

January 3, 2012
Author(s)
Eric L. Shirley, Joshua J. Kas, J. T. Vinson, Fernando D. Vila, John J. Rehr
Theoretical optical and x-ray spectra of model structures of water and ice are calculated using a many-body perturbation theory, Bethe-Salpeter equation (BSE) approach implemented in the valence- and core-excitation codes AI2NBSE and OCEAN. These codes use

Fine Limestone Additions to Regulate Setting in High Volume Fly Ash Mixtures

January 2, 2012
Author(s)
Dale P. Bentz, Taijiro Sato, Igor de la Varga, Jason Weiss
High volume fly ash (HVFA) concrete mixtures are being considered more frequently due to their cost and sustainability advantages. While the long term performance of these HVFA concretes typically meets or exceeds that of conventional concretes, their

NIST/TRC SOURCE Data Archival System: the Next-Generation Data Model for Storage of Thermophysical Properties

January 2, 2012
Author(s)
Andrei F. Kazakov, Chris D. Muzny, Kenneth G. Kroenlein, Vladimir Diky, Robert D. Chirico, Joe W. Magee, Ilmutdin M. Abdulagatov, Michael D. Frenkel
A new data model for storage of experimental thermophysical and thermochemical property data was developed and implemented for NIST/TRC SOURCE data archival system. Substantial improvements in data quality as well as system usability and extendability are

Preparation and Value Assignment of Standard Reference Material 968e Fat-Soluble Vitamins, Carotenoids, and Cholesterol in Human Serum

January 2, 2012
Author(s)
Jeanice M. Brown Thomas, David L. Duewer, Lane C. Sander, Katherine E. Sharpless, Lorna T. Sniegoski, Michael J. Welch, James H. Yen, Mugenya O. Isaac
Standard Reference Material 968e Fat-Soluble Vitamins, Carotenoids, and Cholesterol in Human Serum provides certified values for total retinol, γ- and α-tocopherol; total lutein, total zeaxanthin, total β-cryptoxanthin, total β-carotene, and cholesterol in
Displaying 23901 - 23925 of 73994
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