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Displaying 35001 - 35025 of 73970

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.

Development of a solid-state 100 mK refrigerator for user-supplied microelectronics

January 4, 2006
Author(s)
Nathan A. Tomlin, William Duncan, James A. Beall, Gene C. Hilton, Kent D. Irwin, Dan Schmidt, Joel Ullom
Solid-state refrigerators based on normal metal/insulator/superconductor tunnel junctions are now a practical means of cooling from pumped 3He bath temperatures to near 100 mK. While integration of NIS refrigerators with transition-edge sensors is underway

Fabrication of Prototype Imaging Arrays for SCUBA-2

January 4, 2006
Author(s)
Gene C. Hilton, James A. Beall, W.Bertrand (Randy) Doriese, William Duncan, S. L. Ferreira, Kent D. Irwin, Carl D. Reintsema, Joel Ullom, Leila R. Vale, Yizi Xu, Barry L. Zink, William Parkes, Andrew S. Bunting, Camilla Dunare, Alan Gundlach, T. Stevenson, Anthony Walton, Eric Schulte, Elizabeth Corrales, Joseph P. Sienicki, Dan Bintley, Peter Ade, Rashmi Sudiwala, Adam L. Woodcraft, Mark Halpern, Wayne Holland, Damian Audley, Michael MacIntosh
Prototype imaging sub-arrays for SCUBA-2 (the Sub-millimeter Common-User Bolometer Array) have been fabricated and tested. The pixel count (1280) of these wafer-scale imagers are significantly larger than any other low-temperature detectors produced to

Thermodynamics of nonlinear bolometers near equilibrium

January 4, 2006
Author(s)
Kent D. Irwin
We present the first rigorous and thermodynamically correct calculation of the noise in a simple nonlinear, nonequilibrium resistive bolometer or calorimeter. Existing models of noise in resistive bolometers are based on the application of equilibrium

A Comparison of Thickness Values for Very Thin SiO2 Films by Using Ellipsometric, Capacitance-Voltage and HRTEM Measurements

January 3, 2006
Author(s)
James R. Ehrstein, Curt A. Richter, Deane Chandler-Horowitz, Eric M. Vogel, Chadwin Young, Shweta Shah, Dennis Maher, Brendan C. Foran, Alain C. Diebold
Abstract. A comparison study of very thin SiO2 film thickness values obtained from the three dominant measure-ment techniques used in the Integrated Circuit industry: ellipsometry, capacitance-voltage (C-V) measurements and transmission electron microscopy

Bayesian Alternative to the Guide's Use of the Welch-Satterthwaite Formula

January 3, 2006
Author(s)
Raghu N. Kacker
The Guide to the Expression of Uncertainty in Measurement suggests that to account for the statistical uncertainty in a combined standard uncertainty that arises when one or more of its components are evaluated from a limited number of independent normally

Cryptographic Primitives Can Be Fragile

January 3, 2006
Author(s)
Rene C. Peralta
We show that a well-known coin-flipping protocol is breakable in the sense that one of the parties can pre-determine the result of the coin-flip. The way in which the protocol fails is illustrative of the fact that there are insecure ways of using secure

TRC Thermodynamic Tables - Nonhydrocarbons, Supplement 94, 2005

January 3, 2006
Author(s)
Michael D. Frenkel
1. Table 23-1-a - Page a-1000 Revised table on carbon and carbon oxides containing refractive index, density, boiling point, dT/dP and freezing point. 2. Table 23-2-1-(1.14523)-db - Pages db-5763.0 and db-5736.1 New table for ethyl hexanoate containing the

Ab Initio Calculations of Mean Free Paths and Stopping Powers

January 2, 2006
Author(s)
A P. Sorini, J. Kas, J J. Rehr, M P. Prange, Zachary H. Levine
An approach is presented for theortical calculations of inelastic losses in solids over a broad energy range. The method is based on a many-pole model dielectric function, which is derived from ab initio calculations of optical constants using a real-space
Displaying 35001 - 35025 of 73970
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