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Search Publications

NIST Authors in Bold

Displaying 34726 - 34750 of 73697

Wake Fields in the Electron Gas Including Transverse Response

January 19, 2006
Author(s)
Eric J. Cockayne, Zachary H. Levine
Relativistic electrons have transverse electric fields comparable in magnitude to the longitudinal fields. We determine the relative effects of transverse and longitudinal fields of a moving point charge on the dielectric response of a uniform electron gas

Enhanced ferromagnetic damping in Permalloy/Cu bilayers

January 18, 2006
Author(s)
Thomas Gerrits, Michael Schneider, Thomas J. Silva
We have investigated the enhancement of ferromagnetic damping for thin Permalloy (Ni 80Fe 20) films grown with Cu capping layers of variable thickness (5-1000nm). The measurements were performed with a pulsed inductive microwave magnetometer in the

Effect of tensile strain on grain connectivity and flux pinning in Bi 2 Sr 2 Ca 2 Cu 3 O x tapes

January 17, 2006
Author(s)
Daniel C. van der Laan, John (Jack) W. Ekin, Hans J. van Eck, M Dhalle, Bennie ten Haken, Michael W. Davidson, Justin Schwartz
The grain-to-grain connectivity in Bi 2Sr 2Ca 2Cu 3O x tapes is still poorly understood, even though they have been commercially available in long lengths for several years. This letter explains the effects of tensile strain on the grain-to-grain

First Principles Based Simulations of Relaxor Ferroelectrics

January 16, 2006
Author(s)
Benjamin P. Burton, Eric J. Cockayne, Silvia Tinte, U Waghmare
The phenomenology of Pb(B,B$ {\prime}$)O$_{3}$, perovskite based relaxor ferroelectrics is reviewed, with emphasis on the relationship between chemical short-range order and the formation of polar nanoregions in the temperature range between the freezing

Improved stabilization of a 1.3 um femtosecond optical frequency comb using spectrally tailored continuum from a nonlinear fiber grating

January 15, 2006
Author(s)
Kyoungsik Kim, Leo W. Hollberg, Scott A. Diddams, P. S. Westbrook, Jeffrey W. Nicholson
We report the significant enhancement ($+$24 dB) of the optical beat note between a 657-nm cw laser and the second-harmonic generation of the tailored continuum at 1314 nm generated with a femtosecond Cr:forsterite laser and a nonlinear fiber Bragg grating

Quantum key distribution at telecom wavelengths with noise-free detectors

January 13, 2006
Author(s)
Danna Rosenberg, Sae Woo Nam, Philip A. Hiskett, Charles G. Peterson, Richard J. Hughes, Jane E. Nordholt, Adriana Lita, Aaron J. Miller
The length of a secure link over which a quantum key can be distributed depends on the efficiency and dark-count rate of the detectors used at the receiver. We report on the first demonstration of quantum key distribution using transition-edge sensors with

Integration Testing of Object-Oriented Components Using Finite State Machines

January 12, 2006
Author(s)
Leonard J. Gallagher, A. J. Offutt, Anthony V. Cincotta
In object-oriented terms, one of the goals of integration testing is to ensure that messages from objects in one class or component are sent and received in the proper order and have the intended effect on the state of external objects that receive the

Curvature Enhanced Adsorbate Coverage Model for Electrodeposition

January 11, 2006
Author(s)
Thomas P. Moffat, Daniel Wheeler, Soo K. Kim, Daniel Josell
The impact of leveling additives acting through the traditional leveling mechanism of accumulation and consumption has been coupled with the Curvature Enhanced Accelerator Coverage (CEAC) mechanism previously used to explain bottom-up superfill of features

Nucleobase Orientation and Ordering in Films of Single-Stranded DNA on Gold

January 11, 2006
Author(s)
D Y. Petrovykh, V Perez-Dieste, A Opdahl, H Y. Kimura-Suda, J M. Sullivan, Michael J. Tarlov, F J. Himpsel, L J. Whitman
The structure of single-stranded DNA (ssDNA) immobilized on surfaces is critical to applications exploiting the molecular recognition function of nucleic acids.1-3 Although traditional surface analysis can be applied to adsorbed biomolecules,1 the

Hyperfine Structure Identification of Interstellar Cyanoallene Toward TMC-1

January 10, 2006
Author(s)
Francis J. Lovas, A Remijan, J M. Hollis, P R. Jewell, Lewis E. Snyder
Interstellar cyanoallene (CH2CCHCN) has been detected with the 100-m Green Bank Telescope (GBT) toward the dark Taurus Molecular Cloud (TMC-1) by means of the 414-313, 404-303, 515 -414, and 505-404 rotational transitions at 20.2 GHz, 20.6 GHz, 25.2 GHz

Microwave SQUID multiplexers for low-temperature detectors

January 10, 2006
Author(s)
Kent D. Irwin, James A. Beall, W.Bertrand (Randy) Doriese, William Duncan, Gene C. Hilton, John Mates, Carl D. Reintsema, Dan Schmidt, Joel Ullom, Leila R. Vale, Barry L. Zink, Konrad Lehnert
We report on the development of a SQUID multiplexer operated at microwave frequencies. This multiplexer can accommodate any detector that can be read out with SQUIDs, including transition-edge sensors, magnetic calorimeters, and superconductor-insulator

Toward kilopixel arrays: 3.8 eV microcalorimeter resolution in 8-channel SQUIDmultiplexer

January 10, 2006
Author(s)
W.Bertrand (Randy) Doriese, James A. Beall, William Duncan, S. L. Ferreira, Gene C. Hilton, Kent D. Irwin, Carl D. Reintsema, Joel Ullom, Leila R. Vale, Yizi Xu
Over the past several years, NIST has developed a SQUID time-division multiplexer (TDM) to read out large arrays of transition-edge sensors (TESs). The NIST TDM architecture has been successful in a number of submillimeterand millimeter-wave applications

Personal Identity Verification Card Management Report

January 6, 2006
Author(s)
James F. Dray Jr., David Corcoran
NIST Special Publication 800-73 (http://piv.nist.gov) provides technical specifications for Personal Identity Verification (PIV) cards. However, it does not contain a complete card management specification for PIV systems. This Report provides an overview

Recommended Objective Test Procedures for Road Departure Crash Warning Systems

January 6, 2006
Author(s)
Sandor S. Szabo, Richard J. Norcross
Under the auspices of the Department of Transportation Intelligent Vehicle Initiative, the National Highway Traffic and Safety Administration (NHTSA) is evaluating the safety benefits of Road Departure Crash Warning Systems (RDCWS). These systems warn

Molecular Beam Epitaxial Growth of High-Quality GaN Nanocolumns

January 5, 2006
Author(s)
J E. Van Nostrand, J. E. Averett, R Cortez, J. Boeckl, C Stutz, Norman Sanford, Albert Davydov, M M. Maska
Vertically oriented gallium nitride GaN nanocolumns (NCs) approximately 90±10 nm wide and 0.75 microns tall were grown by plasma-assisted molecular beam epitaxy on Al_(2)O_(3)(0001) and Si(111). The dense packing of the NCs gives them the appearance of a

NIST Time and Frequency Bulletin

January 5, 2006
Author(s)
Eyvon Petty
The Time and Frequency Bulletin provides information on performance of time scales and a variety of broadcasts (and related information) to users of the NIST services.
Displaying 34726 - 34750 of 73697
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