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NIST Authors in Bold

Displaying 28701 - 28725 of 73788

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

Singularity in the Debye-Waller factor of graphene

March 16, 2009
Author(s)
Vinod K. Tewary, B. Yang
It is shown that the Debye-Waller factor for graphene has a singularity. However, the singularity does not affect the zero-temperature value of the Debye-Waller factor. We calculate the zero-temperature limit of the mean-square displacement separately for

Small Angle X-Ray Scattering Measurements of Spatial Dependent Linewidth in Dense Nanoline Gratings

March 16, 2009
Author(s)
Chengqing C. Wang, Wei-En Fu, Bin Li, Huai Huang, Christopher Soles, Eric K. Lin, Wen-Li Wu, Paul S. Ho, Michael W. Cresswell
Small angle X-ray scattering (SAXS) was used to characterize the line cross section of nanoline gratings fabricated using electron beam lithography (EBL) patterning followed by anisotropic wet etching into silicon single crystal. SAXS results at normal

EUVL dosimetry at NIST

March 13, 2009
Author(s)
Charles S. Tarrio, Steven E. Grantham, Marc J. Cangemi, Robert E. Vest, Thomas B. Lucatorto, Noreen Harned
As part of its role in providing radiometric standards in support of industry, NIST has been active in advancing extreme ultraviolet dosimetry on various fronts. Recently, we undertook a major effort in accurately measuring the sensitivity of three extreme
Displaying 28701 - 28725 of 73788
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