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Displaying 18101 - 18125 of 53164

Complex Systems Program Activities Summary, Fiscal Years 2007-2008

January 12, 2010
Author(s)
Sanford P. Ressler
This report summarizes the work of the Complex Systems Program within NIST s Information Technology Laboratory. The Overview presents some background material and a high-level overview of the Program s activities including significant technical

High-Order Coherences of Chaotic and Coherent Optical States

January 12, 2010
Author(s)
Martin J. Stevens, Burm Baek, Eric Dauler, Andrew J. Kerman, Richard J. Molnar, Scott A. Hamilton, Karl Berggren, Richard P. Mirin, Sae Woo Nam
We demonstrate a new approach to measuring high-order temporal coherences that uses a four-element superconducting nanowire single-photon detector. The four independent, interleaved single-photonsensitive elements parse a single spatial mode of an optical

Overview of the TREC 2008 Blog Track

January 12, 2010
Author(s)
Ian M. Soboroff, Iadh Ounis, Craig Macdonald
The Blog track explores the information seeking behaviour in the blogosphere. The track was introduced in 2006 [1], with a main pilot search task, namely the opinion-finding task. In TREC 2007 [2], the track investigated two main tasks inspired by the

Ephemera

January 11, 2010
Author(s)
Isabel M. Beichl
An editorial on the growing importance of soft errors in software.

Polarized Optical Scattering Signatures from Biological Materials

January 11, 2010
Author(s)
W. E. Martin, E. Hesse, J. H. Hough, William Sparks, C. S. Cockell, Z. Ulanowski, Thomas A. Germer, B. Kaye
The polarization of laser light backscattered from biological samples has been measured over the wavelength range 350 to 850nm. Incident circular, linearly polarized, and unpolarized light produces significant spectrally prominent scattered polarizations

Symmetry and Fourier analysis of the ab-initio-determined torsional variation of structural and Hessian-related quantities for application to vibration-torsion-rotation interactions in CH3OH

January 11, 2010
Author(s)
Li-Hong Xu, Jon T. Hougen, Jonathan M. Fisher, Ronald M. Lees
The aim of the present paper is to investigate the use of quantum chemistry calculations to obtain the torsional dependence of various structural and vibrational-force-field-related quantities that could help in estimating the vibration-torsion-rotation

TRC Thermodynamic Tables, Non-Hydrocarbon Supplement NH-102

January 11, 2010
Author(s)
Michael D. Frenkel
(1) Tbl 24-23-10-2-(1.35000)-d: Pg d-13500, New table for chloromethylsilanes for the condensed phases at one bar, or at equilibrium vapor pressure above the boiling point. (2) Tbl 23-1-(1.01000)-db: Pgs db-1002.0 through db-1002.11, New table for carbon

NIST Framework and Roadmap for Smart Grid Interoperability Standards, Release 1.0

January 10, 2010
Author(s)
George W. Arnold, David Wollman, Gerald FitzPatrick, Dean Prochaska, David G. Holmberg, David H. Su, Allen R. Hefner Jr., Nada Golmie, Tanya L. Brewer, Mark Bello, Paul A. Boynton
Under the Energy Independence and Security Act (EISA) of 2007, the National Institute of Standards and Technology (NIST) is assigned "primary responsibility to coordinate development of a framework that includes protocols and model standards for

Ab initio kinetic coefficients of gaseous hydrogen

January 9, 2010
Author(s)
James B. Mehl, Marcia L. Huber, Allan H. Harvey
The spherical portion of the hydrogen intermolecular potential recently determined in ab initio calculations by Patkowski et al [J. Chem. Phys. 129:094304 (2008)] was used to calculate the viscosity and spherical contribution to the thermal conductivity of

Volumetric CT in Lung Cancer: An Example for the Qualification of Imaging as a Biomarker

January 9, 2010
Author(s)
Charles D. Fenimore, Andrew Buckler, P. David Mozeley, Lawrence H. Schwartz, Nicholas Petrick, Michael McNitt-Gray, Kevin O?Donnell, Wendy Hayes, Hyun Kim, Laurence Clarke, Daniel Sullivan
The Quantitative Imaging Biomarker Alliance (QIBA) has been organized to establish a methodology whereby multiple stakeholders collaborate to test hypotheses about the technical feasibility and the medical value of imaging biomarkers. It has charged the

Cryptographic Key Management Workshop Summary - June 8-9, 2009

January 8, 2010
Author(s)
Elaine B. Barker, Dennis K. Branstad, Santosh Chokhani, Miles E. Smid
On June 8 and 9, 2009, NIST held a Cryptographic Key Management (CKM) Workshop at its Gaithersburg, Maryland, campus that attracted approximately 80 people attending the workshop in person, with another 75 participating through video conferencing, and an

The Human Side of Mass Notification

January 8, 2010
Author(s)
Erica D. Kuligowski
On February 19, 2009, the National Institute of Standards and Technology (NIST) held a Federal Workshop on Mass Notification Messages. Participants from 12 federal agencies attended to discuss issues surrounding warning the public, building occupants, and

A New Primary Standardization of Th-229

January 7, 2010
Author(s)
Ryan P. Fitzgerald, Lizbeth Laureano-Perez, Michelle M. Hammond, Leticia S. Pibida, Svetlana Nour, Brian E. Zimmerman
The National Institute of Standards and Technology (NIST) has certified a high-purity Th-229 Standard Reference Material as SRM 4328C, based on live-timed 4-pi alpha,beta-gamma anticoincidence counting (LTAC) of the equilibrium solution. The LTAC system

Density and Speed of Sound Measurements of Hexadecane

January 7, 2010
Author(s)
Stephanie L. Outcalt, Arno R. Laesecke, Tara J. Fortin
The density and speed of sound of hexadecane have been measured using two instruments. Both instruments use the vibrating-tube method for measuring density. Ambient pressure (83 kPa) density and speed of sound measurements were carried out with a rapid

A Hybrid Frame Concealment Algorithm for H.264/AVC

January 5, 2010
Author(s)
Hamid Gharavi
In packet-based video transmissions, packets loss due to channel errors may result in the loss of the whole video frame. Recently, many error concealment algorithms have been proposed in order to combat channel errors, however most of the existing

Demonstrating the metrological compatibility of uranium isotope amount ratio measurement results performed by GSMS, TIMS and MC-ICPMS techniques

January 5, 2010
Author(s)
Olivio Pereira de Oliveira, Willy De Bolle, Stefan Richter, Adolfo Alonso, Emmanuel Ponzevera, Christophe Qu?tel, Jorge Eduardo de Souza Sarkis, Roger Wellum, Ruediger Kessel
The metrological compatibility of n(234U)/n(238U), n(235U)/n(238U) and n(236U)/n(238U) isotope amount ratio measurement results performed by gas source mass spectrometry (GSMS), thermal ionisation mass spectrometry (TIMS) and multi-collector inductively

High Throughput Techniques for Fire Retardant Materials Development

January 5, 2010
Author(s)
Rick D. Davis, Richard E. Lyon
None was required. Here is the last paragraph of the introduction. In this chapter are examples of how we used HT to accelerate knowledge about polymer materials. The first case study describes the development and application of HT tools and methods to

Low-Cost, High-Throughput, Automated Counting of Bacterial Colonies

January 5, 2010
Author(s)
Matthew L. Clarke, Robert L. Burton, A. N. Hill, Maritoni A. Litorja, Moon H. Nahm, Jeeseong Hwang
Research involving bacterial pathogens often requires enumeration of bacteria colonies. Here we present a low-cost, high-throughput colony counting system consisting of colony counting software and a consumer-grade digital camera or document scanner. We
Displaying 18101 - 18125 of 53164