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Displaying 40576 - 40600 of 74099

Guide to Information Technology Security Services

October 9, 2003
Author(s)
Timothy Grance, Joan Hash, Marc Stevens, Kristofor O'Neal, Nadya Bartol
Organizations frequently must evaluate and select a variety of information technology (IT) security services in order to maintain and improve their overall IT security program and enterprise architecture. IT security services, which range from security

Guide to Selecting Information Technology Security Products

October 9, 2003
Author(s)
Timothy Grance, Marc Stevens, Marissa Myers
The selection of IT security products is an integral part of the design, development and maintenance of an IT security infrastructure that ensures confidentiality, integrity, and availability of mission critical information. The guide seeks to assist in

Facility for Pulsed Extreme Ultraviolet Detector Calibration

October 8, 2003
Author(s)
Steven E. Grantham, Robert E. Vest, Charles S. Tarrio, Thomas B. Lucatorto
All of the Extreme Ultraviolet light sources currently under consideration for Extreme Ultraviolet lithography are based on plasmas that emit radiation with a wavelength of approximately 13.4 nm. These sources whether they are produced by a discharge or

RF and IF mixer optimum matching impedances extracted by large-signal vectorial measurements

October 7, 2003
Author(s)
Alessandro Cidronali, Giovanni Loglio, Jeffrey Jargon, Kate Remley, I. Magrini, Donald C. DeGroot, Dominique Schreurs, Kuldip Gupta, Gianfranco Manes
This paper introduces a new technique that allows us to measure the admittance conversion matrix of a two-port device, using a Nonlinear Vector Network Analyzer. This method is applied to extract the conversion matrix of a 0.2 micron pHEMT, driven by a 4.8

RF Behavioural Modelling from Multisine Measurements: Influence of Excitation Type

October 7, 2003
Author(s)
Dominique Schreurs, M. Myslinski, Catherine A. Remley
Behavioural models for RF devices are typically based on large-signal RF measurements. Until now, those measurements were usually limited to single-tone excitations. In this work, we focus on the use of multisines in the experiment design, and, more

Real-Space Imaging of Structural Transitions in the Vortex Lattice of V 3 Si

October 6, 2003
Author(s)
C Sosolik, Joseph A. Stroscio, Mark D. Stiles, E Hudson, Steven R. Blankenship, Aaron P. Fein, Robert Celotta
The predictions of nonlocal London theory are confirmed by real-space measurements of the hexagonal to nearly square transition in the vortex lattice structure of V 3Si. We observe that the lattice transforms from hexagonal to nearly square over the field

Scattering by Slightly Non-Spherical Particles on Surfaces

October 6, 2003
Author(s)
Thomas A. Germer
We investigate the shape dependence of the scattering by dielectric and metallic particles on surfaces by considering particles whose free-space scattering properties are nearly identical. The scattering by metallic particles is fund to be strongly

The Role of Carrier Lifetime in Forward Bias Degradation of 4H-SiC PiN Diodes

October 5, 2003
Author(s)
Allen R. Hefner Jr., Ty R. McNutt, David W. Berning, Ranbir Singh, Adwoa Akuffo
Abstract. The role of excess carrier lifetime reduction in the mechanism for on-state voltage (Vf) degradation of high voltage 4H-SiC PiN diodes is investigated. A method is developed to electrically monitor the emitter, base, and end region excess carrier

An All-Fiber, Phase-Locked Supercontinuum Source for Frequency Metrology

October 2, 2003
Author(s)
Brian Washburn, Jeffrey W. Nicholson, M. Yan, C. G. Jorgensen, Scott Diddams, Nathan R. Newbury
A phase-locked IR frequency comb is produced by an all-fiber supercontinuum source based on an amplified mode-locked Erbium fiber laser and highly nonlinear, dispersion-shifted fiber. Stabilization of the carrier envelope offset frequency and repetition

A Rapid Prototyping Technique for the Fabrication of Solvent-Resistant Structures

October 1, 2003
Author(s)
C Harrison, J Cabral, Christopher M. Stafford, Alamgir Karim, Eric J. Amis
We demonstrate a rapid prototyping technique for the fabrication of solvent-resistant channels up to and exceeding one millimeter in height. The fabrication of channels with such dimensions by conventional lithography would be both challenging and time

Adaptive Characterization of Jitter Noise in Sampled High-Speed Signals

October 1, 2003
Author(s)
Kevin J. Coakley, Chih-Ming Wang, Paul D. Hale, Tracy S. Clement
We estimate the root-mean-square (RMS) value of timing jitter noise in simulated signals similar to measured high-speed sampled signals. The simulated signals are contaminated by additive noise, timing jitter noise, and time shift errors. Before estimating

Advanced Engineering Environments for Small Manufacturing Enterprises: Volume I

October 1, 2003
Author(s)
Steven J. Fenves, Ram D. Sriram, Young Choi, J E. Robert
Advanced engineering environments (AEEs) are computational and communications systems that can create virtual and/or distributed environments linking researchers, technologists, designers, manufacturers, suppliers, and customers, providing for the orderly

Averaged Transition Conditions for Electromagnetic Fields at a Metafilm

October 1, 2003
Author(s)
Edward Kuester, Mohamed Mohamed, Christopher L. Holloway, Melinda Picket-May
This work derives generalized sheettransition conditions (GSTCs) for the average electromagnetic fields across a surface distribution of electrically small scatterers characterized by electric and magnetic polarization densities. We cann such an

Awareness in Human-Robot Interactions

October 1, 2003
Author(s)
J L. Drury, Jean C. Scholtz, Holly A. Yanco
This paper provides a set of definitions that form a framework for describing the types of awareness that humans have of robot activities and the knowledge that robots have of the commands given them by humans. We used as a case study an analysis of data

Backup Resource Pooling in (M : N) n Fault Recovery Schemes in GMPLS Optical Networks

October 1, 2003
Author(s)
Kotikalapudi Sriram, David W. Griffith, San-Nan K. Lee, Nada T. Golmie
In resilient optical networks, there is a tradeoff between the amount of resources allocated for protection versus the probability that a failed working path cannot be covered, known as protection blocking probability. Often the network topology permits
Displaying 40576 - 40600 of 74099
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