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Displaying 33576 - 33600 of 74024

Role-Based Access Control, Second Edition

December 31, 2006
Author(s)
David F. Ferraiolo, David R. Kuhn, Ramaswamy Chandramouli
[ISBN-13: 978-1-59693-113-8] This newly revised edition of "Role-Based Access Control" offers the latest details on a security model aimed at reducing the cost and complexity of security administration for large networked applications. The second edition

A practical guide to the CIF:usability measurements

December 29, 2006
Author(s)
Mary F. Theofanos, Brian C. Stanton, Nigel Bevan
Using the Common Industry Format ( CIF) to specify usability measures can positively influence the development process. The CIF remains inherently flexible and adaptable?empowering the practitioner to identify success criteria specific to the application

Common Vulnerability Scoring System

December 29, 2006
Author(s)
Peter M. Mell, Karen Kent Scarfone, Sasha Romanosky
Organizations struggle to assess the relative importance of software vulnerabilities across disparate hardware and software platforms. They must prioritize vulnerabilities and remediate those that pose the greatest risk. However, most software vendors and

Electrical breakdown in the microscale: testing the standard theory

December 29, 2006
Author(s)
Emmanouel S. Hourdakis, Garnett W. Bryant, Neil M. Zimmerman
We present breakdown voltage measurement data in air taken with a technique we recently developed. The data suggests that below 10 ?m of electrode separation the dominant effect is field emission of electrons from the electrodes. Analyzing the data in that

Intelligent Unmanned Ground Vehicle Navigation via Information Evaluation

December 29, 2006
Author(s)
Rajmohan Madhavan, Elena R. Messina
Sensor-centric navigation of Unmanned Ground Vehicles (UGVs) operating in rugged and expansive terrains requires the competency to evaluate the utility of sensor information such that it results in intelligent behavior of the vehicles. Highly imperfect

Learning in a Hierarchical Control System: 4D/RCS in the DARPA LAGR Program

December 29, 2006
Author(s)
James S. Albus, Roger V. Bostelman, Tommy Chang, Tsai H. Hong, William P. Shackleford, Michael O. Shneier
The Defense Applied Research Projects Agency (DARPA) Learning Applied to Ground Vehicles (LAGR) program aims to develop algorithms for autonomous vehicle navigation that learn how to operate in com-plex terrain. Over many years, the National Institute of

Observation of the Radiative Decay Mode of the Free Neutron

December 29, 2006
Author(s)
Jeffrey S. Nico, Maynard S. Dewey, Thomas R. Gentile, Hans P. Mumm, Alan K. Thompson, B Fisher, I Kremsky, Fred E. Wietfeldt, T E. Chupp, R Cooper, E Beise, K G. Kiriluk, J Byrne, Kevin J. Coakley
The theory of quantum electrodynamics predicts that beta decay of the neutron into a proton, electron, and antineutrino should be accompanied by a continuous spectrum of soft photons. While this inner bremsstrahlung branch has been previously measured in

PIV Card to Reader Interoperability Guidelines

December 29, 2006
Author(s)
James F. Dray Jr., April Giles, Michael Kelley, Ramaswamy Chandramouli
The purpose of this document is to present recommendations for Personal Identity Verification (PIV) card readers in the area of performance and communications characteristics to foster interoperability. This document is not intended to re-state or

Toward a Computational Theory of Mind

December 29, 2006
Author(s)
James S. Albus
Scientific knowledge of the brain and technology of intelligent systems have developed to a point where a computational theory of mind is feasible. This paper briefly describes the RCS (Real-time Control System) reference model architecture that has been

NIST Handbook 150-18 NVLAP Fasteners and Metals: 2006 Edition

December 22, 2006
Author(s)
Thomas R. Davis
NIST Handbook 150-18 presents technical requirements and guidance for the accreditation of laboratories under the National Voluntary Laboratory Accreditation Program(NVLAP)Fasteners and Metals Program. It is intended for information and use by accredited

Elastic mapping and quantitative nanoscale modulus measurements of SnO2 nanobelts

December 21, 2006
Author(s)
Yuegui Zheng, Robert E. Geer, Malgorzata Kopycinska-Mueller, Donna C. Hurley
A comparative study of the elastic uniformity and modulus of single-crystal SnO2 nanobelts is presented employing two nondestructive techniques based on atomic force microscopy: differential ultrasonic force microscopy (d-UFM) and atomic force acoustic

Is NO 3 Formed During the Decomposition of Nitramine Explosives?

December 21, 2006
Author(s)
Karl K. Irikura, Russell D. Johnson III
Quantum chemistry calculations reveal that it is both thermodynamically and kinetically reasonable to produce NO3 (nitrate radical) during the thermal decomposition of RDX (1,3,5-trinitrohexahydro-s-triazine) and other nitramines. However, experimental

Laser Cooled Atoms as a Focused Ion Beam Source

December 21, 2006
Author(s)
James L. Hanssen, Jabez J. McClelland, E Dakin, M Jacka
The evolving field of nanofabrication demands that more precise fabrication and evaluation tools be developed. We describe a method for creating a high quality focused ion beam with enhanced capabilities using an ion source based on laser-cooled neutral

Evaluation Campaigns and TRECvid

December 20, 2006
Author(s)
Alan Smeaton, Paul D. Over, Wessel Kraaij
The TREC Video Retrieval Evaluation (TRECvid) is an international benchmarking activity to encourage research in video information retrieval by providing a large test collection, uniform scoring procedures, and a forum for organizations interested in

Manipulation of magnetic particles by patterned arrays of magnetic spin-valve traps

December 20, 2006
Author(s)
Elizabeth Mirowksi, John M. Moreland, Stephen E. Russek, Michael J. Donahue
A novel magnetic for microfluidic manipulation of magnetic particles is discussed. The particles are confined by an array of magnetic spin valves with bistable ferromagnetic "ON" and antiferromagnetic "OFF" net magnetization states. The switchable fringing
Displaying 33576 - 33600 of 74024
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