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NIST Authors in Bold

Displaying 24201 - 24225 of 73726

Extending single-photon optimized superconducting transition edge sensors beyond the single-photon counting regime

September 19, 2011
Author(s)
Thomas Gerrits, Brice R. Calkins, Nathan A. Tomlin, Adriana E. Lita, Alan L. Migdall, Sae Woo Nam, Richard P. Mirin
Photon number resolving transition-edge sensors (TES) are the cutting-edge enabling technology for high quantum efficiency photon number counting. The TES developed at NIST reliably show system detection efficiencies of more than 95%, and even approach 99%

Fully lithographic fiber-coupled cryogenic radiometer for picowatt powers

September 19, 2011
Author(s)
Nathan A. Tomlin, John H. Lehman, Sae Woo Nam
A new type of absolute cryogenic radiometer has been fabricated at the microscale level for direct substitution optical fiber power measurements. It consists of three parts: an absorber, electrical heater, and thermometer all on a single micro-machined

International comparisons of optical fiber power measurements

September 19, 2011
Author(s)
Igor Vayshenker, David J. Livigni, Xiaoyu X. Li, John H. Lehman
We discuss the results of optical fiber power meter (OFPM) measurements at 1310 and 1550 nm made by NIST and seven national measurement institutes (NMIs). We also describe transfer standards and the associated uncertainties. The comparisons show a

Modeling of Bolted Connections for Collapse Analysis of Steel Structures

September 19, 2011
Author(s)
Joseph A. Main, Fahim Sadek
In structural collapse scenarios, beam to column connections can be subjected to large rotations as the structure deforms, in addition to large axial forces associated with the development of catenary action. The capability of the connections to sustain

Reversed-Flow Chromatographic Determination of Binary Diffusion Coefficients

September 19, 2011
Author(s)
William S. McGivern, Jeffrey A. Manion
A reversed-flow chromatographic apparatus for the measurement of binary diffusion coefficients is described. Hydrocarbons are detected using flame ionization detection, and inert species can be detected by thermal conductivity. We have measured the binary

Review of Current Progress in Nanometrology with Helium Ions

September 19, 2011
Author(s)
Michael T. Postek, Andras Vladar, Bin Ming, Charles Archie
Scanning electron microscopy has been employed as an imaging and measurement tool for more than 50 years and it continues as a primary tool in many research and manufacturing facilities across the world. A new challenger to this work is the helium ion

Ultracold Atoms and Precise Time Standards

September 19, 2011
Author(s)
Gretchen K. Campbell, William D. Phillips
Experimental techniques of laser cooling and trapping, along with other cooling techniques have produced gaseous samples of atoms so cold that they are, for many practical purposes, in the quantum ground state of their center-of-mass motion. Such low

Absolute high-power laser measurements with a flowing water power meter

September 18, 2011
Author(s)
Christopher L. Cromer, Xiaoyu X. Li, John H. Lehman, Marla L. Dowell
We describe a novel flowing water power meter (FWOPM) for high-power laser radiometry in the range of 50 W to 10 kW. The FWOPM has several design features; a rotating mirror oriented at 45° with respect to the incoming radiation, a conical light-trapping

ANSI/NIST-ITL 1-2011 Requirements and Conformance Test Assertions

September 16, 2011
Author(s)
Christofer J. McGinnis, Dylan J. Yaga, Fernando L. Podio
The current version of the ANSI/NIST-ITL standard "Data Format for the Interchange of Fingerprint, Facial & Other Biometric Information" is specified in two parts. Part 1, ANSI/NIST-ITL 1-2007, specifies the traditional format, and Part 2, ANSI/NIST-ITL 2

5 MHz Phase Detector With Low Residual Flicker

September 15, 2011
Author(s)
Corey A. Barnes, Archita Hati, Craig W. Nelson, David A. Howe
The measurement of close-to carrier phase modulation (PM) noise of state-of-the-art oscillators is always challenging. Quite often the residual noise of the phase detector used in these measurements is the source of difficulty. In particular at Fourier

CCR Suitability Analysis

September 15, 2011
Author(s)
Liora Alschuler
This document analyzes the suitability of the ASTM Continuity of Care Record (CCR) specification to support the US Department of Health and Human Services’ (HHS) Meaningful Use. It is part of the Healthcare Information Technology (HIT) Standards Analysis

Continuity of Care (CCD) Standards Action Plan

September 15, 2011
Author(s)
Liora Alschuler
This document is the action plan to improve the suitability of Health Level Seven (HL7) Continuity of Care Document (CCD) to support the Department of Health and Human Services’ Stage 1 Meaningful Use. Lantana Consulting Group prepared this report for the

Continuity of Care Document (CCD) Suitability Analysis

September 15, 2011
Author(s)
Liora Alschuler
This document analyzes the suitability of the Health Level Seven (HL7) Continuity of Care Document (CCD) specification to support the US Department of Health and Human Services’ (HHS) Meaningful Use. It is part of the Healthcare Information Technology (HIT

Continuity of Care Record (CCR) Action Plan

September 15, 2011
Author(s)
Liora Aschuler
This document is the action plan to improve the suitability of ASTM Continuity of Care Record (CCR) to support the Department of Health and Human Services’ Stage 1 Meaningful Use. Lantana Consulting Group prepared this report for the National Institute of

Evidence for upregulated repair of oxidatively induced DNA damage in human colorectal cancer

September 15, 2011
Author(s)
M Miral Dizdar, Pawel Jaruga, Prasad T. Reddy, Guldal Kirkali, Didem Keles, Gulgun Oktay, Aras E. Canda
Molecular pathways that play a role in the development of colorectal cancer involve multiple genetic changes in cancer-related genes that may be caused by overproduction of oxygen-derived species including free radicals, which are capable of damaging DNA

Graphene: A New Horizon for Modern Technology

September 15, 2011
Author(s)
Jan Obrzut
Graphene has the potential to improve a long list of daily electronics that are the foundation of the modern computing revolution. In step with research in renewable energy, graphene can and has been used in efficient, flexible solar cells. Crossing the

High-Resolution Infrared Spectra of Spiropentane, C5H8

September 15, 2011
Author(s)
Alfons Weber, J E. Price, K A. Coulterpark, Tony Masiello, Joseph W. Nibler, A Maki, Thomas A. Blake
Infrared spectra of spiropentane (C5H8) have been recorded at a resolution (0.002 cm-1) sufficient to resolve for the first time individual rovibrational lines. This initial report presents the ground state constants for this molecule determined from the

Information System Security Best Practices for UOCAVA-Supporting Systems

September 15, 2011
Author(s)
Andrew R. Regenscheid, Geoff Beier, Santosh Chokhani, Paul Hoffman, Jim Knoke, Scott Shorter
IT systems used to support UOCAVA voting face a variety of threats. If IT systems are not selected, configured and managed using security practices commensurate with the importance of the services they provide and the sensitivity of the data they handle, a

Magnetization textures in NiPd nanostructures

September 15, 2011
Author(s)
Jean-Yves Chauleau, Benjamin James McMorran, R. Belkhou, Nicolas Bergeard, Tevfik Mente?, Miguel Angel Nino, Andrea Locatelli, John Unguris, Stanislas Rohart, Jacques Miltat, Andre Thiaville
We have observed peculiar magnetization textures in Ni80Pd20 nanostructures, by three different imaging techniques (MFM, XMCD-PEEM and SEMPA). The appearance of diamond-like domains with strong lateral charges, and of weak stripes structures brings into

Rectangular Scale-Similar Etch Pits in Monocrystalline Diamond

September 15, 2011
Author(s)
Craig D. McGray, Richard A. Allen, Marc J. Cangemi, Jon C. Geist
Etching of monocrystalline diamond in oxygen and water vapor at 1100° C through small pores in a silicon nitride film produced smooth-walled rectangular cavities. The cavities were imaged by electron microscope and measured by interferometric microscopy
Displaying 24201 - 24225 of 73726
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