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Displaying 34251 - 34275 of 73832

Quantum Key Distribution System Operating at Sifted-Key Rate over 4 Mbit/s

June 19, 2006
Author(s)
Xiao Tang, Lijun Ma, Alan Mink, Anastase Nakassis, Hai Xu, Barry J. Hershman, Joshua Bienfang, David H. Su, Ronald Boisvert, Charles W. Clark, Carl J. Williams
A complete fiber-based polarization encoding quantum key distribution (QKD) system based on the BB84 protocol has been developed at National Institute of Standard and Technology (NIST). The system can be operated at a sifted key rate of more than 4 Mbit/s

TRC Thermodynamic Tables - Non-Hydrocarbon Supplement No. NH95

June 19, 2006
Author(s)
Michael D. Frenkel
1. Table 23-2-1-(1.18100)-db - Pages db-5851.0 and db-5851.1 New table for methyl 2-hydroxybenzoate containing the density for the real fluid at selected temperatures and pressures. 2. Table 23-2-1-(1.18140)-db - Pages db-5855.0 and db-5855.1 New table for

Determining Design Fires for Design-Level and Extreme Events

June 16, 2006
Author(s)
Richard W. Bukowski
Proper fire safety design requires the appropriate selection of design fires against which the performance of the building is evaluated. The selection of the design fire(s) directly impacts all aspects of fire safety performance, including the structural

Atom-based stabilization for laser-pumped atomic clocks

June 15, 2006
Author(s)
Vladislav Gerginov, V Shah, Svenja A. Knappe, Leo W. Hollberg, John E. Kitching
We describe a novel technique for stabilizing frequency shifts in laser-interrogated vapor-cell atomic clocks. The method suppresses frequency shifts due to changes in the laser frequency, intensity and modulation index as well as atomic vapor density. The

X-Ray Topography for Fractography of Single-Crystal Components

June 15, 2006
Author(s)
David R. Black, George D. Quinn
X-ray diffraction topography, which is sensitive to local strain and/or crystallographic orientation, provides a unique view of single-crystal samples both before and after fracture. It can find strength and performance limiting surface and subsurface

Certification of SRM 114q: Part I

June 14, 2006
Author(s)
Chiara F. Ferraris, William F. Guthrie, A Aviles, Robin K. Haupt, Bruce S. MacDonald
The standard reference material (SRM) for fineness of cement, SRM 114, is an integral part of the calibration material routinely used in the cement industry to qualify cements. Being a powder, the main physical properties of cement, prior to hydration, are

Certification of SRM 114q: Part II

June 14, 2006
Author(s)
Chiara F. Ferraris, Max A. Peltz, William F. Guthrie, A Aviles, Robin K. Haupt, Bruce S. MacDonald
The standard reference material (SRM) for fineness of cement, SRM 114, is an integral part of the calibration material routinely used in the cement industry to qualify cements. Being a powder, the main physical properties of cement, prior to hydration, are

Characterization of Inertance Tubes Using Resonance Effects

June 14, 2006
Author(s)
Michael A. Lewis, Peter E. Bradley, Ray Radebaugh, Zhihua Gan
Inertance tubes can be characterized by their inertance, compliance, and resistance. All three of these impedance components are present during normal measurements of inertance tube impedance. As a result, in comparing experimental results with models it

Feasibility on Using a Concrete Mixing Truck as a Rheometer

June 14, 2006
Author(s)
S Amziane, Chiara C. Ferraris, E Koehler
Fresh concrete properties are crucial for the performance of the concrete in its hardened state. The measurement of workability is usually done using a simple slump test. This test, although widely used for almost 100 years, does not provide a full picture

Program: 2006 Boulder Laboratories Postdoctoral Poster Symposium

June 14, 2006
Author(s)
Joe W. Magee
The Boulder Laboratories Diversity Council has announced a networking opportunity - the 2006 Boulder Laboratories Postdoctoral Poster Symposium, for postdoctoral associates and student affiliates. The planned event is to begin with an informal gathering

Proposed Rapid Cooldown Technique for Pulse Tube Cryocoolers

June 14, 2006
Author(s)
Ray Radebaugh, Agnes O?Gallagher, Michael A. Lewis, Peter E. Bradley
Some cryocooler applications, such as those for military operations dealing with high temperature superconducting (HTS) magnets, motors, or generators, require faster cooldown times than what can normally be provided with a cryocooler designed to

Usability Standards: Are they effective in fostering good usability practice?

June 14, 2006
Author(s)
Mary F. Theofanos, Whitney Quesenbery, Dean Barker, Lisa Battle, Mike Paciello, Mary Beth Rettger
Do standards have a place in developing our usability practice? From those who believe they are a critical part of developing the profession to those who think they get in the way of creativity, standards provoke strong opinions. At Usability Professionals

Uncertainties of Spectral Responsivity Measurements

June 13, 2006
Author(s)
George P. Eppeldauer, G Sauter, James Gardner
Uncertainty estimates of detector spectral responsivity measurements are discussed. A model describes independent (uncorrelated) uncertainty components at a given wavelength based on the measurement equation for test detector calibrations. Systematic

When to Fuse Two Biometrics?

June 13, 2006
Author(s)
Elham Tabassi, Patrick J. Grother, George W. Quinn
Biometric fusion, acquisition and combination of multiple pieces of evidence of identity, can achieve higher accuracy of biometric recognition than using a single biometric. However, fusion increases the cost or throughput of the system since it requires

Focus Groups Gauge Satisfaction of Interdisciplinary Customer Segments

June 12, 2006
Author(s)
Nancy Allmang, Mylene S. Ouimette
This poster describes a series of focus groups conducted by librarians at the Research Library at the National Institute of Standards and Technology (NIST) to assess the information needs and satisfaction of three hard-to-identify, interdisciplinary groups
Displaying 34251 - 34275 of 73832
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