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Displaying 42801 - 42825 of 74053

Monte Carlo Simulation of Noise Parameter Uncertainties

November 1, 2002
Author(s)
James P. Randa, Wojciech Wiatr
We present results for uncertainties in noise-parameter measurements, obtained using a Monte Carlo simulation of the measurements. Sets of data were generated to simulate measurements on a low-noise amplifier, with given uncertainties in the underlying

Multifunctional ToF-SIMS: Combinatorial Mapping of Gradient Energy Substrates

November 1, 2002
Author(s)
S V. Roberson, Albert J. Fahey, A Sehgal, Alamgir Karim
We present a simple method for chemical modification of chlorosilane self-assembled monolayers (SAMS) on Si surfaces by exposure to a gradient of UV-ozone radiation to create stable substrates with a range of contact angles (θ H2O {approximately equal to}

NIST's Assessment of Text Independent Speaker Recognition Performance

November 1, 2002
Author(s)
Mark A. Przybocki, Alvin F. Martin
NIST has coordinated annual evaluations of text-independent speaker recognition since 1996. These evaluations aim to provide important contributions to the direction of research efforts and the calibration of technical capabilities. They are intended to be

NIST's Assessment of Text Independent Speaker Recognition Performance

November 1, 2002
Author(s)
Mark A. Przybocki, Alvin F. Martin
NIST has coordinated annual evaluations of text-independent speaker recognition since 1996. These evaluations aim to provide important contributions to the direction of research efforts and the calibration of technical capabilities. They are intended to be

Observation of polarization-locked vactor solitons in optical fiber

November 1, 2002
Author(s)
Steven T. Cundiff, B C. Collins, N N. Akhmediev, J M. Soto-Crespo, K Bergman, W H. Knox
We observe the formation of polarization-locked vector solitons in a modelocked fiber laser. Temporal vector solitons contain components along both principal axes of the birefringent laser cavity. The relative phase of the two components is locked to a

Observation of polarization-locked vector solitions in optical fiber

November 1, 2002
Author(s)
B C. Collins, N N. Akhmediev, J M. Soto-Crespo, K Bergman, W H. Knox
We observe the formation of polarization-locked vector solitons in a modelocked fiber laser. Temperal vector solitons contain components along both principal axes of the birefringent laser cavity. The relative phase of the two components is locked to a

Phase-Field Models of Solidification

November 1, 2002
Author(s)
Geoffrey B. McFadden
Phase-field models of solidification are presented in the context of diffuse-interface theories based on conserved and non-conserved Order parameters. Phase-field models for single-component materials are derived, and the sharp interface limits that relate

Photodissociation Spectroscopy of Stored CH + Ions: Detection, Assignment and Close-Coupled Modeling of Near-Threshold Feshbach Resonances

November 1, 2002
Author(s)
U Hechtfischer, Carl J. Williams, J Lange, J Linkemann, D Schwalm, R Wester, A Wolf, D Zajfman
We have measured and theoretically analyzed a photodissociation spectrum of the CH + molecular ion in which most observed energy levels lie within the fine-structure splitting of the C + fragment and predissociate, with the observed irregular lineshapes

Precise Energies of Highly Excited Hydrogen and Deuterium

November 1, 2002
Author(s)
Svetlana A. Kotochigova, Peter J. Mohr, Barry N. Taylor
The energy levels of hydrogen and deuterium atoms are calculated to provide frequencies for transitions between highly excited states with principal quantum number n up to 200. All known quantum electrodynamics and relativistic corrections have been

Radiolytic Dechlorination of Polychlorinated Biphenyls in Transformer Oil and in Marine Sediment

November 1, 2002
Author(s)
M Chaychian, C A. Jones, Dianne L. Poster, Joseph Silverman, Pedatsur Neta, Robert E. Huie, M I. Al-Sheikhly
Radiolytic dechlorination of PCBs in transformer oil and in marine sediments has been studied. At low PCB concentrations, complete degradation of the PCBs in transformer oil was achieved without degradation of the oil. Addition of an organic base

Rate Coefficients and Products of Ethyl and Vinyl Cross-Radical Reactions

November 1, 2002
Author(s)
Askar Fahr, D C. Tardy
Rate constant and products of vinyl (H 2C=CH) and ethyl (C 2H 5) cross-radical reactions have been determined at ambient temperature and 93 kPa (700 Torr) pressure. Vinyl and ethyl radicals were produced simultaneously through the 193-nm excimer laser

Second Workshop on Wireless Sensing Proceedings

November 1, 2002
Author(s)
James D. Gilsinn, Kang B. Lee, Richard D. Schneeman, Hui-Min Huang
The second Workshop on Wireless Sensing was held on October 4, 2001, at the Sensors Expo & Conference at the Philadelphia Convention Center in Philadelphia, PA. The National Institute of Standards and Technology (NIST), SENSORS magazine, Sensors Conference

Security for Telecommuting and Broadband Communications

November 1, 2002
Author(s)
Shirley M. Radack
This bulletin summarizes NIST SP 800-46, Security for Telecommuting and Broadband Communications, published September 2002. The report discusses both technical and policy issues, and provides guidance on using personal firewalls, strengthening the security

Simulation of SCC Flow

November 1, 2002
Author(s)
Nicos Martys, Chiara F. Ferraris
Predicting the rheological properties of concrete is essential for its optimal use in situations such as flow between rebars. The aggregate gradation and shape, as well as the rheological properties of the mortar or cement paste will affect the flow of SCC

Software Engineering for Intelligent Control Systems

November 1, 2002
Author(s)
Tony Barbera, Elena R. Messina, Hui-Min Huang, Craig I. Schlenoff, Stephen B. Balakirsky
Understanding how humans manage information and carry out actions provides a foundation for the software engineering of intelligent control systems. The Real-time Control System (RCS) design methodology and reference architecture, founded on human

Standards for Bullets and Casings

November 1, 2002
Author(s)
Jun-Feng Song, Theodore V. Vorburger, Robert A. Clary, Eric P. Whitenton, Li Ma, Susan M. Ballou
The National Institute of Standards and Technology is developing reference standards through its Office of Law Enforcement Standards with funding provided by the National Institute of Justice. The standard reference materials are used by crime laboratories

Structure of HI1333 (YhbY), a Putative RNA-Binding Protein From Haemophilus Influenzae

November 1, 2002
Author(s)
M A. Willis, W Krajewski, V R. Chalamasetty, Prasad T. Reddy, A J. Howard, O Herzberg
The structures of a number of small [alpha]/[Beta] RNA-binding proteins with diverse biological functions are known1. Their topologies and the locations of the RNA-binding sites vary considerably, consistent with the plasticity of RNA due to base-pair

Study on Isochoric Specific Heat Capacities for Liquid Methanol-Water Mixtures

November 1, 2002
Author(s)
Hiroshi Kitajima, Hiroyuki Miyamoto, Noboru Kagawa, Joe W. Magee, Harumi Endo, Seizo Tsuruno, Koichi Watanabe
Hydrogen bonding of water (H 2O) is certain to introduce an effect of the molecular energy to the heat capacity. Due to the presence of the strong hydrogen bonding, interactions between water and methanol (CH 3OH) molecules show anomalous thermodynamic

Surface and Interface Properties of PVDF/Acrylic Copolymer Blends

November 1, 2002
Author(s)
Xiaohong Gu, Tinh Nguyen, Mark R. VanLandingham, D Nguyen
Poly(vinylidene fluoride) (PVDF) is commonly blended with amorphous polymers to improve its optical property. The surface and interface properties of PVDF blended with different amounts of poly(methyl methacrylate) and poly(ethyl acrylate) copolymer (PMMA

Systems Administration Guidance for Securing Microsoft Windows 2000 Professional System

November 1, 2002
Author(s)
Murugiah P. Souppaya, Anthony B. Harris, Mark McLarnon, Nikolaos Selimis
The document is intended to assist the users and system administrators of Windows 2000 Professional systems in configuring their hosts by providing configuration templates and security checklists. The guide provides detailed information about the security
Displaying 42801 - 42825 of 74053
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