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Displaying 42701 - 42725 of 73960

Layered Droplet Microstructures in Sheared Emulsions: Finite-Size Effects

November 1, 2002
Author(s)
Jai A. Pathak, M C. Davis, Steven D. Hudson, Kalman D. Migler
We investigate the influence of confinement on the steady state microstructure of emulsions sheared between parallel plates, in a regime where the average droplet dimension is comparable to the gap width between the confining walls. Utilizing droplet

Magnetization Reversal in Half-Metallic Epitaxial CrO 2 Films

November 1, 2002
Author(s)
I L. Siu, William F. Egelhoff Jr., D X. Yang, H D. Chopra
We have investigated the magnetization reversal in thin films of the half-metallic ferromagnet chromium dioxide, CrO 2, grown on single crystal TiO 2 (100) and (110) substrates. X-ray diffraction analysis indicated epitaxial growth of CrO 2 in the rutile

Measurement of the 100 nm NIST SRM 1963 by Laser Surface Light Scattering

November 1, 2002
Author(s)
Thomas A. Germer, George W. Mulholland, Jae Hyun Kim, S H. Ehrman
Accurate sizing of particles deposited on surfaces is important for the semiconductor, optical, and data storage industries. The recent availability of accurate light scattering models for non-ideal conditions enables the determination of particle size

Model-Based Approach to Security Test Automation

November 1, 2002
Author(s)
Mark Blackburn, Robert Busser, Aaron Nauman, Ramaswamy Chandramouli
Security functional testing is a costly activity typically performed by security evaluation laboratories. These laboratories have struggled to keep pace with increasing demand to test numerous product variations. This paper summarizes the results of

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
Displaying 42701 - 42725 of 73960
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