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Displaying 2026 - 2050 of 2934

Hyperspectral Image Projector for Advanced Sensor Characterization

December 4, 2006
Author(s)
Steven W. Brown, Joseph P. Rice, Jorge E. Neira, Bettye C. Johnson
In this work, we describe radiometric platforms able to produce realistic spectral distributions and spatial scenes for the development of application-specific metrics to quantify the performance of sensors and systems. Using these platforms, sensor and

Trapped atomic ions and quantum information processing

July 16, 2006
Author(s)
David J. Wineland, Dietrich G. Leibfried, James C. Bergquist, Brad R. Blakestad, John J. Bollinger, Joseph W. Britton, J Chiaverini, Ryan Epstein, David Hume, Wayne M. Itano, John D. Jost, Emanuel H. Knill, Jeroen Koelemeij, C. Langer, R Ozeri, Rainer Reichle, Till P. Rosenband, Tobias Schaetz, Piet Schmidt, Signe Seidelin, Nobuyasu Shiga, Janus Wesenberg
The basic requirements for quantum computing and quantum simulation (Single- and multi-qubit gates, long memor times, etc.)have been demonstrated in separate experiments on trapped ions. Construction of a large-scale information processor will require

Application of carbon nanotube coatings for laser measurements

October 17, 2005
Author(s)
John H. Lehman, Paul Rice, Natalia Varaksa, Chaiwat Engtrakul, Anne Dillon
We have demonstrated coatings based on carbon nanotubes (CNTs) on a variety of detector platforms for laser power and energy measurement standards. These coatings must be resistant to damage and aging while maintaining desirable optical and thermal

Modeling Fire Growth and Spread in Houses. (Abstract/Presentation/Visuals)

December 1, 2003
Author(s)
Kevin B. McGrattan
In cooperation with the fire protection engineering community, a numerical fire model, Fire Dynamics Simulator (FDS), is being developed at NIST to study fire behavior and to evaluate the performance of fire protection systems in buildings. Version 1 of

Deprotection Volume Characteristics and Line Edge Morphology in Chemically Amplified Resists

June 1, 2003
Author(s)
Ronald L. Jones, C G. Willson, T J. Hu, Vivek M. Prabhu, Christopher L. Soles, Eric K. Lin, Wen-Li Wu, D L. Goldfarb, M Angelopoulos, B C. Trinque
The focus of this paper is the form of spatial heterogeneity of deprotection at the eventual pattern edge. The form results from the packing of fuzzy blobs consisting of volumes of deprotection created by individual photogenerated acids. The form and size

Advances in Optical Methods for Trace Gas Analysis

May 1, 2003
Author(s)
Pamela M. Chu
The fundamental principles for chemical analysis by optical methods are established. However, only recent advances in instrumentation and spectroscopic techniques have substantially expended the feasibility of routine spectroscopic analysis of gaseous

A Phenomenological Droplet Impact Model for Lagrangian Spray Transport

January 1, 2003
Author(s)
P E. DesJardin, Cary Presser, P J. Disimile, J R. Tucker
The overall objective of this research is to gain fundamental knowledge of fire-suppression agent transport in the cluttered environments of aircraft engine nacelles (i.e., hydraulic and electrical lines, mounting brackets, etc.). A new generation of Halon

A Droplet Impact Model for Agent Transport in Engine Nacelles

May 1, 2002
Author(s)
P E. DesJardin, Cary Presser, P J. Disimile, J R. Tucker
The overall objective of this research is to gain fundamental knowledge of fire-suppression agent transport in the cluttered environments of aircraft engine nacelles (i.e., hydraulic and electrical lines, mounting brackets, etc.). A new generation of Halon

Combinatorial Materials Science: What's New Since Edison?

April 1, 2002
Author(s)
Eric J. Amis, X D. Xiang, J C. Zhao
Combinatorial methods, or high throughput experimentations, have captured the attention of the materials industry due to the promise of providing new discoveries faster, better, and cheaper. However, in the scientific community combinatorial methods have

Wavenumber Standards for Mid-Infrared Spectrometry

February 1, 2002
Author(s)
Leonard M. Hanssen, C. J. Zhu
Accuracy of the wavenumber scale of spectroscopic instrumentation is fundamentally important for most applications. Most modern Fourier transform spectrophotometers (FTS) incorporate HeNe lasers that are used to set the wavenumber scale for the instrument

Security Self-Assessment Guide for Information Technology Systems

September 5, 2001
Author(s)
Marianne M. Swanson, Elizabeth B. Lennon
This ITL Bulletin summarizes Special Publication (SP) 800-26, Security Self-Assessment Guide for Information Technology Systems. Adequate security of information and the systems that process it is a fundamental management responsibility. Agency officials

Collaboration Between NPL and NIST

November 7, 2000
Author(s)
K B. Gebbie
Since its inception in 1901, the National Institute of Standards and Technology (NIST) (then the National Bureau of Standards) has sought guidance from its sister institute, the National Physical Laboratory. For almost a century, the two institutions have

Refrigerant/Lubricant Mixture Boiling Heat Transfer Research at NIST

September 1, 2000
Author(s)
Mark A. Kedzierski
This paper overviews the boiling heat transfer research of the recent few years at NIST (National Institute of Standards and Technology) on refrigerant/lubricant mixtures. The aim of the research was to fundamentally understand the effects of lubricant

Pulse Transition Duration Measurements and Standards at NIST -- 1975 to 1988

August 1, 2000
Author(s)
W L. Gans, N. S. Nahman, J R. Andrews, E E. Baldwin
The techniques employed by NBS from the mid 70s through 1988 for the calibration of the pulse transition duration (TD) of a fast, step-like, electrical pulse generator are described along with the artifact requirements imposed on the pulse generator. The

On the Validity of the Poisson Hypothesis for Low-Level Counting; Investigation of the Distributional Characteristics of Background Radiation with the NIST Individual Pulse Counting System

August 1, 1998
Author(s)
George A. Klouda, Lloyd A. Currie, E M. Eijgenhuijsen
Does radioactive decay follow the Poisson distribution?--a fundamental question to which the theoretical answer seems to be, Yes. On the practical side, the answer to this question impacts the best achievable precision in well-controlled counting

A Primer on Electrical Units in the Systems International

June 1, 1998
Author(s)
Neil M. Zimmerman
I examine the dissemination of the electrical units, from basic physical laws to commercial calibrations. I discuss the important distinction between realization and representation of units, which refers back to the distinction between SI (Le Systeme

Can a Pressure Standard be Based on Capacitance Measurements?

March 1, 1998
Author(s)
Michael R. Moldover
We consider the feasibility of basing a pressure standard on measurements of the dielectric constant [epsilon] and the thermodynamic temperature T of helium near )[degrees]C. The pressure P of the helium would be calculated using the fundamental constants
Displaying 2026 - 2050 of 2934
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