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Displaying 35101 - 35125 of 74256

Collisions and Near-Collisions for Reduced-Round Tiger

March 1, 2006
Author(s)
John M. Kelsey, Stefan Lucks
We describe a collision-finding attack on 16 rounds of the Tiger hash function requiring the time for about 244 compression function invocations. This extends to a collision-finding attack on 17 rounds of the Tiger hash function in time of about 249

Crystal Structure of the Class IV Adenylyl Cyclase From Yersinia Pestis

March 1, 2006
Author(s)
N Smith, Sung Kim, Prasad T. Reddy, David T. Gallagher
ABSTRACT: The crystal structure of the class IV adenylyl cyclase from Yersinia pestis is reported at 1.9 resolution. The class IV fold is distinct from the previously described folds for class II and class III ACs. The dimeric Yp AC-IV folds into an

Elevator Controls

March 1, 2006
Author(s)
Richard W. Bukowski, R P. Fleming, Jeffrey Tubbs, Christopher Marrion, Jill Dirksen, Chris Duke, Debbie Prince, Lee F. Richardson, Dave Beste, Dottie Stanlaske
The development of firefighter elevators and special application egress elevators is reviewed. Recent activities of the elevator industry and NIST to develop standards and building code requirements for elevators for use by the fire service and by

Fire Dynamics Simulator (Version 4) - Technical Reference Guide

March 1, 2006
Author(s)
Kevin B. McGrattan
Fire Dynamics Simulator (FDS) is a computational fluid dynamics (CFD) model of fire-driven fluid flow. The software described in this document solves numerically a form of the Navier-Stokes equations appropriate for low-speed, thermally-driven flow with an

Fundamentals of the Reaction-Diffusion Process in Model EUV Photoresists

March 1, 2006
Author(s)
Kristopher Lavery, George Thompson, Hai Deng, D S. Fryer, Kwang-Woo Choi, B D. Vogt, Vivek Prabhu, Eric K. Lin, Wen-Li Wu, Sushil K. Satija, Michael Leeson, Heidi B. Cao
More demanding requirements are being made of photoresist materials for fabrication of nanostructures as the feature critical dimensions (CD) decrease. For EUV resists, control of line width roughness (LWR) and high resist sensitivity are key requirements

High-accuracy determination of epitaxial AlGaAs composition with inductively coupled plasma optical emission spectroscopy

March 1, 2006
Author(s)
Kristine A. Bertness, C. M. Wang, Marc L. Salit, Gregory C. Turk, Therese A. Butler, Albert J. Paul, Larry Robins
Inductively coupled plasma optical emission spectroscopy is shown to confirm a recent correlation between photoluminescence (PL) peak energy for AlGaAs epitaxial films and the Al mole fraction x of those films. These two methods also agree within their

Koehler Illumination for High-Resolution Optical Metrology

March 1, 2006
Author(s)
Martin Y. Sohn, Bryan M. Barnes, Lowell P. Howard, Richard M. Silver, Ravikiran Attota, Michael T. Stocker
Accurate preparation of illumination is critical for high-resolution optical metrology applications such as line width and overlay measurements. To improve the detailed evaluation and alignment of the illumination optics, we have separated Koehler

Magnetic Field-Induced Spectroscopy of Strongly Forbidden Optical Transitions

March 1, 2006
Author(s)
Alexey Taychenachev, V Yudin, Christopher W. Oates, C Hoyt, Zeb Barber, Leo W. Hollberg
We propse a method that uses a static magnetic field to enalbe direct optical excitation of forbidden electric dipole transitions that are otherwise prohibitively weak. The method is based on mxing of atomic states by a static magnetic field. The methid

Measurement of Impulse Spectrum Amplitude for Use in EMI Susceptibility Tests

March 1, 2006
Author(s)
Nicholas Paulter, Donald R. Larson
A system for measuring the impulse spectrum amplitude of the output of impulse generators and the response of receivers is described. The calibration procedures used in this measurement system were recently modified, which resulted in a reduction in the

Minimum Security Requirements for Federal Information and Information Systems

March 1, 2006
Author(s)
National Institute of Standards and Technology (NIST), Ronald S. Ross, Stuart W. Katzke, L A. Johnson
FIPS 200 is the second standard that was specified by the Federal Information Security Management Act (FISMA). It is an integral part of the risk management framework that the National Institute of Standards and Technology (NIST) has developed to assist

Oxidative Stress and DNA Damage-DNA Repair System in Vascular Smooth Muscle Cells in Artery and Vein Grafts

March 1, 2006
Author(s)
S. H. McLaren, D. Gao, L. Chen, J. R. Eshleman, V. Dawson, M. A. Trush, V. Bohr, M. Dizdaroglu, G. M. Williams, C. Wei
Graft failure in coronary artery bypass grafts (CABGs) utilizing the saphenous vein is significantly higher than in those utilizing the internal mammary artery (IMA) or the radial artery (RA). While a number of studies have described this phenomenon

Perceptual Study of the Impact of Varying Frame Rate on Motion Imagery Interpretability

March 1, 2006
Author(s)
Charles D. Fenimore, J Irvine, D Cannon, John W. Roberts, A Aviles, S Israel, Michelle Brennan, L Simon, J Miller, Donna Haverkamp, P F. Tighe, Michael Gross
The development of a motion imagery (MI) quality scale, akin to the National Image Interpretibility Rating Scale (NIIRS) for still imagery, would have great value to designers and users of surveillance and other MI systems. A multi-phase study has adopted
Displaying 35101 - 35125 of 74256
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