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Displaying 35751 - 35775 of 73697

CCQM -K39- DETERMINATION OF CHLORINATED PESTICIDES IN SOLUTION: FINAL REPORT

October 12, 2005
Author(s)
CCQM OAWG, Michele M. Schantz, David L. Duewer, Willie E. May, Reenie M. Parris, Stephen Wise
Solutions of known mass fraction of organic analytes of interest are typically used to calibrate the measurement processes used in the determination of these analytes. Appropriate value assignments and uncertainty calculations for these calibration

Sensitivity of Multiple Sequence Alignments to Perturbations in Cost Matrices

October 12, 2005
Author(s)
Fern Y. Hunt, Agnes A. O'Gallagher
A description of a new method for aligning biological sequences is presented. It is based on a formulation as a Markov decision optimization problem. Alignment is obtained by solving an associated linear programming problem. In this paper we show that the

TRC Thermodynamic Tables - Hydrocarbons, Supplement No. 130, 2005

October 11, 2005
Author(s)
Michael D. Frenkel
1. Table 23-2-(3.11102)-db - Pages db-2052.0 and 2052.1; New table for butylcyclohexane containing the density for the real fluid at selected temperatures and pressures. 2. Table 23-2-(3.11104)-db - Page db-2054.0; New table for heptylcyclohexane

Interstellar Isomers: The Importance of Bonding Energy Differences

October 10, 2005
Author(s)
A J. Remijan, J M. Hollis, Francis J. Lovas, David F. Plusquellic, P R. Jewell
We present new observations of large cyanide molecules and their corresponding isocyanide isomers toward the Sgr B2(N)molecular cloud. We report the first detection of the JK=10-00 transition of methyl isocyanide (CH3NC) with the 100-m Green Bank Telescope

Measuring Interfacial Roughness by Polarized Optical Scattering

October 10, 2005
Author(s)
Thomas A. Germer
Polarized optical scatter measurements yield information that can be used to identify sources of scatter. In this chapter, we review measurements of angle-resolved polarized optical scattering and their application to the measurement of roughness of

Sodium Bose-Einstein Condensates in an Optical Lattice

October 10, 2005
Author(s)
K Xu, Y Liu, J R. Abo-Shaeer, T Mukaiyama, J K. Chin, D E. Miller, W Ketterle, Kevin Jones, Eite Tiesinga
The phase transition from a superfluid to a Mott insulator has been observed in a 23Na Bose-Einstein condensate. A dye laser detuned 5 nm red of the Na 3 ^2S \rightarrow 3 ^2P_1⁄2 transition was used to form the three dimensional optical lattice. The

Developing an Analysis of Threats to Voting Systems: Workshop Summary

October 7, 2005
Author(s)
Allan C. Eustis
The Help America Vote Act (HAVA) of 2002 has given NIST a key role in helping to realize nationwide improvements in voting systems by January 2006. NIST research activities authorized by HAVA include the security of computers, computer networks, and

Developing an Analysis of Threats to Voting Systems: Workshop Summary

October 7, 2005
Author(s)
Allan C. Eustis
The Help America Vote Act (HAVA) of 2002 has given NIST a key role in helping to realize nationwide improvements in voting systems by January 2006. NIST research activities authorized by HAVA include the security of computers, computer networks, and

Epitaxial growth of rhenium with sputtering

October 6, 2005
Author(s)
Seongshik Oh, Dustin P. Hite, Katarina Cicak, Kevin Osborn, Raymond W. Simmonds, Robert Mcdermott, Ken B. Cooper, Matthias Steffen, John M. Martinis, David P. Pappas
We have grown epitaxial renium (0001) films on α-Al 2O 3(0001) substrates using sputter deposition in an ultra high vacuum system. We find that better epitaxy is achieved with DC rather than with RF sputtering. With DC sputtering, epitaxy is obtained with

CCQM K40 DETERMINATION OF PCB CONGENERS IN SOLUTION: FINAL REPORT

October 5, 2005
Author(s)
David L. Duewer, Willie E. May, Reenie M. Parris, Michele M. Schantz, Stephen A. Wise
Abstract. Solutions of known mass fraction of organic analytes of interest are typically used to calibrate the measurement processes used in the determination of these analytes. Appropriate value assignments and uncertainty calculations for these

High Speed Fiber-Based Quantum Key Distribution using Polarization Encoding

October 5, 2005
Author(s)
Xiao Tang, Lijun Ma, Alan Mink, Anastase Nakassis, Barry J. Hershman, Joshua Bienfang, Ronald Boisvert, Charles W. Clark, Carl J. Williams, A Gross, E Hagley, J Wen
We have implemented a quantum key distribution (QKD) system with polarization encoding at 850 nm over 1 km of optical fiber. The high-speed management of the bit-stream, generation of random numbers and processing of the sifting algorithm are all handled

Infrared Emittance Measurements at NIST

October 5, 2005
Author(s)
Leonard M. Hanssen, Benjamin K. Tsai, Sergey Mekhontsev
A new capability for the measurement of the temperature-dependent emittance of specular samples in the near infrared spectral region has been developed in NIST s Infrared Spectrophotometry Laboratory to provide emittance measurements and standards for a

Low Temperature Calorimetry Studies of Hydrating Portland Cement Pastes

October 5, 2005
Author(s)
Dale P. Bentz
This report presents nearly 200 low temperature calorimetry (LTC) scans performed on hydrating portland cement pastes between 2002 and 2005. Because the LTC scans provide valuable information on the percolation of various size pore networks within the

Fragility of Glass-Forming Polymer Liquids

October 4, 2005
Author(s)
J Dudowicz, Karl Freed, Jack F. Douglas
Many fluids exhibiting complex molecular structure or interactions solidify by glass-formation rather than crystallization. This tendency is especially prevalent in polymeric and biological systems where glass-formation is normal rather than exceptional

IT: The Thirteenth Text Retrieval Conference, TREC 2004

October 3, 2005
Author(s)
Ellen M. Voorhees
This report provides an overview of the thirteenth Text Retrieval Conference, TREC 2004. TREC 2004 was held at the National Institute of Standards and Technology (NIST) November~16--19, 2004. The conference was co-sponsored by NIST, the US Department of

Overview of the TREC 2004 Terabyte Track

October 3, 2005
Author(s)
Charles L. Clarke, Nick Craswell, Ian Soboroff
The Terabyte Track explores how adhoc retrieval and evaluationtechniques can scale to terabyte-sized collections. For TREC 2004, ourfirst year, 50 new adhoc topics were created and evaluated over a426GB collection of 25 million documents taken from the
Displaying 35751 - 35775 of 73697
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