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NIST Authors in Bold

Displaying 28926 - 28950 of 74034

Primary Standards and Dosimetry Protocols for Brachytherapy Sources

March 20, 2009
Author(s)
Christopher G. Soares, G. Douyssey, Michael G. Mitch
Current primary standards for the calibration of both photon and beta particle emitting brachythrapy sources are reviewed. Methods for quality control being used as well as methods of transferring these standards to secondary laboratories and user are also

Report on Acceleration Comparison SIM.AUV.V-K1 - Draft B

March 20, 2009
Author(s)
David J. Evans, Adriana Hornikova, Stefan D. Leigh, Andrew L. Rukhin, William E. Strawderman
The first regional key comparison in vibration conducted under the auspices of the Inter-American System of Metrology (SIM) was begun in 1996. The comparison was registered with the International Bureau of Weights and Measures (BIPM) through the

Thermodynamic and Thermophysical Properties ( Including Mixtures) of the Reference Ionic Liquid: 1-Hexyl-3-Methylimidazolium Bis[(Trifluoromethyl) Sulfonyl]amide. Part 2. Critical Evaluation and Recommended Property Values

March 20, 2009
Author(s)
Robert D. Chirico, Vladimir Diky, Joe W. Magee, Michael D. Frenkel, Kenneth N. Marsh
This article is a product of IUPAC Project 2002-005-1-100 (Thermodynamics of ionic liquids, ionic liquid mixtures, and the development of standardiized systems). Experimental results of thermodynamic, transport, and phase equilibrium studies made on a

Thermodynamic and Thermophysical Properties of the Reference Ionic Liquid: 1-Hexyl-3-Methylimidazolium Bis[(Trifluoromethyl)Sulfonyl]amide (including mixtures). Part 1. Experimental Methods and Results

March 20, 2009
Author(s)
Kenneth N. Marsh, Joan F. Brennecke, Robert D. Chirico, Michael D. Frenkel, Andreas Heintz, Joe W. Magee, Cor J. Peters, Luis P. Rebelo, Kenneth R. Seddon
This article summarized the results of IUPAC Project 2002-005-1-100 (Thermodynamics of ionic liquids, ionic liquid mixtures, and the development of standardized systems). The methods used by the various contributors to measure the thermophysical and phase

Word-synchronous linear optical sampling of 40 Gb/s QPSK signals

March 20, 2009
Author(s)
Tasshi Dennis, Paul A. Williams, Ian R. Coddington, Nathan R. Newbury
We demonstrate word-synchronous measurements of QPSK format 40 Gb/s PRBS signals using linear optical sampling with a precision time-base, which allows us to average waveforms and distinguish between signal distortion and noise in eye diagrams.

Quantifying Residual Stress in Nanoscale Thin Polymer Films via Surface Wrinkling

March 19, 2009
Author(s)
Jun Y. Chung, Thomas Q. Chastek, Michael J. Fasolka, Hyun W. Ro, Christopher Stafford
Residual stress, a pervasive consequence of solid materials processing, is stress that remains in a material after external forces have been removed. In polymeric materials, residual stress results from processes, such as film formation, that force and

Development of a Powered Outdoor Sealant Fatigue Test Apparatus

March 18, 2009
Author(s)
Christopher C. White, R. S. Williams, Steve Lacher, Corey C. Halpin
A new cyclic fatigue test apparatus (CFTA) was developed at the USDA Forest Service, Forest Products Laboratory. The new CFTA is computer-controlled and powered by electric linear actuators. Computer control allows the CFTA to subject specimens to specific

Restrictions on Transversal Encoded Quantum Gate Sets

March 18, 2009
Author(s)
Bryan K. Eastin, Emanuel H. Knill
Transversal gates play an important role in the theory of fault-tolerant quantum computation due to their simplicity and robustness to noise. By definition, transversal operators do not couple physical subsystems within the same code block. Consequently

Transparency and conductivity of carbon nanotube networks

March 18, 2009
Author(s)
Jan Obrzut
The conductivity of films made of nanotubes longer than 200 nm closely follows the percolation theory for two-dimensional (2D) networks. The scaling universal exponents describing the percolation transition from an insulating to conducting state with

A Model of Melting and Dripping Thermoplastic Objects in Fire

March 17, 2009
Author(s)
Kathryn M. Butler
A model of the melting and dripping behavior of thermoplastic materials in fire is being developed using the Particle Finite Element Method (PFEM), which is capable of tracking the large changes in shape inherent to this problem in addition to solving the

FIREBRAND ATTACK ON CERAMIC TILE ROOFING ASSEMBLIES

March 17, 2009
Author(s)
Samuel L. Manzello, Yoshihiko Hayashi, Takefumi Yoneki, Yu Yamamoto
The present study is concerned with investigating the ignition of ceramic roofing assembles (Spanish tile roofing) to a controlled firebrand attack using the Firebrand Generator. Current standards exist to test ignition of roofing decks to firebrands by

NUMERICAL SIMULATION OF FIRE SPREAD ON POLYURETHANE FOAM SLABS

March 17, 2009
Author(s)
Kuldeep R. Prasad, Roland Kramer, Nathan D. Marsh, Marc R. Nyden, Thomas J. Ohlemiller, William M. Pitts, Mauro Zammarano
The NIST Fire Dynamics Simulator (FDS) is used extensively by the fire protection engineer for performance based design and forensic analysis. The equations of motion describing the gas phase are relatively well known and the approximations in the various

SUSTAINABLE FLAME RETARDANT NANOCOMPOSITES

March 17, 2009
Author(s)
Jeffrey W. Gilman
This paper examines the current state of research into sustainable flame retardants with the work on nanocomposites highlighted. The motivations to move away from halogen-based flame retardants are discussed and a number of life-cycle-assessments are

CMOS Microhotplate Technology for Chemical and Biological Agent Detection

March 16, 2009
Author(s)
Muhammad Y. Afridi, Christopher B. Montgomery, Elliott cooper-Balis, Stephen Semancik, Jon C. Geist, Alim A. Fatah
In this paper we describe microhotplates that can serve as platforms for gas sensors of potential use for homeland security and other gas sensing applications. A brief review of the fabrication of microhotplate precursors in a CMOS-compatible technology

Computer Security Division 2008 Annual Report

March 16, 2009
Author(s)
Patrick D. O'Reilly
This annual report covers the work conducted within the National Institute of Standards and Technology's Computer Security Division during Fiscal Year 2008. It discusses all projects and programs within the Division, staff highlights, and publications.

Non-Adiabatic Spin Transfer Torque in Real Materials

March 16, 2009
Author(s)
Ion Garate, Keith Gilmore, Mark D. Stiles, Allan H. MacDonald
The motion of simple domain walls and of more complex magnetic textures in the presence of a transport current is described by the Landau-Lifshitz-Slonczewski (LLS) equations. Predictions of the LLS equations depend sensitively on the ratio between the

Pulse shaping for background free broadband CARS

March 16, 2009
Author(s)
Young Jong Lee, Marcus T. Cicerone
We demonstrate that pulse shaping of a probe pulse can suppress the nonresonant background (NRB) contribution and retrieve resonant Raman signal efficiently in broadband coherent anti-Stokes Raman scattering (CARS) spectrum. A pulse shaper prepares a probe
Displaying 28926 - 28950 of 74034
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