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Displaying 25401 - 25425 of 74221

Frequency Up-conversion Single Photon Detectors for Quantum Communication Systems

April 27, 2011
Author(s)
Lijun Ma, Oliver T. Slattery, Xiao Tang, Joshua Bienfang
Frequency up-conversion technology can be used to increase detection efficiency for near infrared photons, as has been demonstrated in fiber-based quantum communication systems. In a continuous wave pumped up-conversion detector, the temporal resolution is

High Pressure Viscosity Measurements of 1,1,1,2-Tetrafluoroethane

April 27, 2011
Author(s)
Arno R. Laesecke, Scott Bair
Viscosity measurements have been carried out with a falling-cylinder instrument in the compressed liquid and supercritical region of the hydrofluorocarbon 1,1,1,2-tetrafluoroethane (R134a). A highly pure sample was used. The measurement region at

NIST Handbook 133: Checking the Net Contents of Packaged Goods (2011 Ed.)

April 27, 2011
Author(s)
Kenneth S. Butcher, Linda D. Crown, David Sefcik, Lisa Warfield
This handbook has been prepared as a procedural guide for the compliance testing of net contents statements on packaged goods. Compliance testing of packaged goods is the determination of the conformance results of the packaging, distribution, and

A new interface defect spectroscopy method

April 26, 2011
Author(s)
Jason T. Ryan, Liangchun (. Yu, Jae Han, Joseph J. Kopanski, Kin P. Cheung, Fei Zhang, Chen Wang, Jason P. Campbell, John S. Suehle, Vinny Tilak, Jody Fronheiser

ThermoData Engine (TDE): Software Implementation of the Dynamic Data Evaluation Concept. 6. Dynamic Web-based Data Dissemination through the NIST Web Thermo Tables

April 26, 2011
Author(s)
Kenneth G. Kroenlein, Chris D. Muzny, Vladimir Diky, Andrei F. Kazakov, Robert D. Chirico, Joe W. Magee, Ilmutdin M. Abdulagatov, Michael D. Frenkel
ThermoData Engine (TDE) is the first full-scale software implementation of the dynamic data evaluation concept, as reported recently in this journal. In the present paper, we describe the development of a World Wide Web-based interface to TDE evaluations

An optical lattice of flux

April 25, 2011
Author(s)
Ian B. Spielman
A suitable optical lattice for cold atoms could produce a large effective magnetic field in which the atoms would realize analogs to quantum Hall states.

Compact cryogenic self-aligning fiber-to-detector coupling with losses below one percent

April 25, 2011
Author(s)
Aaron J. Miller, Adriana Lita, Brice R. Calkins, Igor Vayshenker, Stephen Gruber, Sae Woo Nam
We present a compact packaging technique for coupling light from a single-mode telecommunication fiber to cryogenic singlephoton sensitive devices. Our single-photon detectors are superconducting transition-edge sensors (TESs) with a collection area only a

DEVELOPMENT OF LARGE DIRECTIONAL WIND SPEED DATABASES

April 25, 2011
Author(s)
Dong Hun Yeo
For structures sensitive to wind directionality, methods for the estimation of wind effects require the use of time series of directional wind speeds with length exceeding the length of the MRIs of interest. This study proposes a procedure for generating

Certification of Vitamins and Carotenoids in SRM 3280 Multivitamin/Multielement Tablets

April 24, 2011
Author(s)
Lane C. Sander, Katherine E. Sharpless, Stephen A. Wise, Bryant C. Nelson, Karen W. Phinney, Barbara J. Porter, Catherine A. Rimmer, Jeanice M. Brown Thomas, Laura J. Wood, James H. Yen, David L. Duewer, R. Atkinson, R. Chen, R. Goldschmidt, W.R. Wolf, I-P Ho, M. Betz
A new multivitamin/multielement dietary supplement Standard Reference Material (SRM) has been issued by the National Institute of Standards and Technology (NIST) with certified and reference concentration values for 13 vitamins, 24 elements, and two

Microscopic Polarization in the Bilayer Graphene

April 24, 2011
Author(s)
Joseph A. Stroscio, Suyong S. Jung, Nikolai N. Klimov, David B. Newell, Nikolai B. Zhitenev, Gregory Rutter
Bilayer graphene has drawn significant attention due to the opening of a band gap in its low energy electronic spectrum, which offers a route to electronic applications that is not practical with single layer graphene. The gap can be either tunable through

NIST Reference Material Scaffolds Characterized for Cell Response

April 24, 2011
Author(s)
Carl G. Simon Jr., Jeff M. Coles
Reference scaffolds characterized for cell response are being developed for use as a standard for biological characterization of new scaffolds. The need for reference scaffolds to serve as a calibration standard between labs has been identified as critical

Chirped-pulse terahertz spectroscopy for broadband trace gas sensing

April 22, 2011
Author(s)
Eyal Gerecht, Kevin O. Douglass, David F. Plusquellic
We report the first demonstration of a broadband trace gas sensor based on chirp-pulse terahertz spectroscopy. The advent of newly developed solid state sources and heterodyne detectors for the terahertz frequency range have made it possible to generate

Critical Observations for the Evaluation of Cement Hydration Models

April 22, 2011
Author(s)
Dale P. Bentz
The development of computer models for cement hydration and microstructure development that has accelerated in the past 25 years has created a need for a set of critical experimental observations that can be used in evaluating the model predictions. During

Protein Dynamics on the Nanosecond Time Scale: Dielectric and Simulation Studies

April 22, 2011
Author(s)
Sheila Khodadadi, Joseph E. Curtis, A. P. Sokolov
We studied dynamics of hydrated Rnase A and its hydration shell by combining MD simulations and Dielectric spectroscopy technique. The results show that there are not significant numbers of water molecules at the protein surface which are able to exchange
Displaying 25401 - 25425 of 74221
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