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Displaying 31851 - 31875 of 73461

A Complete Guide to the Common Vulnerability Scoring System Version 2.0

July 30, 2007
Author(s)
Peter M. Mell, Karen A. Scarfone, Sasha Romanosky
The Common Vulnerability Scoring System (CVSS) provides an open framework for communicating the characteristics and impacts of IT vulnerabilities. CVSS consists of three groups: Base, Temporal and Environmental. Each group produces a numeric score ranging

CVSS-SIG Version 2 History

July 30, 2007
Author(s)
Peter M. Mell, Karen A. Scarfone, Gavin Reid
This document attempts to interpret the history and rationale behind changes made in the Common Vulnerability Scoring System (CVSS) from version 1 to version 2 (referred to as CVSS v1 and v2 in this document.) This document contains multiple appendices

Random Telegraph Signals in n-type ZnO Nanowire Field Effect Transistors at Low Temperature

July 30, 2007
Author(s)
Hao Xiong, Wenyong Wang, Qiliang Li, Curt A. Richter, John S. Suehle, Woong-Ki Hong, Takhee Lee, U Falke
Single-crystal ZnO nanowires have been fabricated as field effect transistors (FETs). The characteristics of low frequency noise in the drain current of n-type ZnO FETs have been investigated through random telegraph signals (RTSs) at 4.2 K. At room

Subcentimeter depth resolution using a single-photon counting time-of-flight laser ranging system at 1550 nm wavelength

July 30, 2007
Author(s)
Ryan E. Warburton, Aongus McCarthy, Andrew M. Wallace, Sergio Hernandez-Marin, Robert Hadfield, Sae Woo Nam, Gerald S. Buller
We demonstrate subcentimeter depth profiling at a stand off distance of 330 m using a time-of-flight approach based on time-correlated single-photon counting. For the first time to our knowledge, the photon-counting time-of-flight technique was

In-Situ Investigation of Water Transport in an Operating PEM Fuel Cell Using Neutron Radiography: Part 2 - Transient Water Accumulation in an Interdigitated Cathode Flow Field

July 27, 2007
Author(s)
Jon P. Owejan, T Trabold, David L. Jacobson, D Baker, Daniel S. Hussey, Muhammad D. Arif
An interdigitated cathode flow field was tested in-situ with neutron radiography to measure the water transport through the porous gas diffusion layer in a PEM fuel cell. Constant current density to open circuit cycles were tested and the resulting liquid

Measuring the Overall Security of Network Configurations Using Attack Graphs

July 27, 2007
Author(s)
Lingyu Wang, Anoop Singhal, Sushil Jajodia
Today?s computer systems face sophisticated intrusions during which multiple vulnerabilities are combined for reaching an attack goal. To quantitatively assess the security of a network, one must first understand the interplay between vulnerabilities and

Neutron Images of the Through-Plane Water Distribution of an Operating PEM Fuel Cell

July 27, 2007
Author(s)
Daniel S. Hussey, David L. Jacobson, Muhammad Arif, Jon P. Owejan, Jeffrey J. Gagliardo, T Trabold
Neutron imaging has proven an invaluable tool for water metrology in operating proton exchange membrane fuel cells. Due to limitations in scintillator-based detector resolution, neutron imaging has been applied only to assessing the in-plane water

Border Gateway Protocol Security

July 26, 2007
Author(s)
Shirley M. Radack
The Border Gateway Protocol (BGP) plays a critical role in the effective operation of the Internet. BGP is used to update routing information between major systems, which makes it possible for systems connected to the Internet to receive and transmit

Controlled Exchange Interaction Between Pairs of Neutral Atoms in an Optical Lattice

July 26, 2007
Author(s)
M Anderlini, Patricia J. Lee, Ben L. Brown, Jennifer Sebby-Strabley, William D. Phillips, James V. Porto
Ultra-cold atoms trapped by light, with their inherent quantum coherence and controllability, provide an attractive system for quantum information and for the simulation of complex problems in condensed matter physics. Quantum information processing

Engineering Safety, Applied Mechanics, and Nondestructive Evaluation

July 26, 2007
Author(s)
Jeffrey T. Fong, Owen F. Hedden
The American Society of Mechanical Engineers (ASME) Pressure Vessels and Piping (PVP) Division, through its Materials and Fabrication Committee and Code and Standards Committee, sponsors a 2-day symposium on Nondestructive Evaluation (NDE) in honor of Dr

Texture and Phase Analysis of a Ca 3 Co 4 O 9 / Si (100) Thermoelectric Film

July 26, 2007
Author(s)
Winnie K. Wong-Ng, Y F. Hu, Mark D. Vaudin, B He, Makoto Otani, Nathan Lowhorn, Q Li
This paper reports the texture analysis as well as the identification of two crystalline phases between a thin film of monoclinic Ca3Co4O9 and a cubic (100) Si substrate, using a diffractometer equipped with a 2-dimensional area detector. No reflections

Computational Model Predictions of Suspension Rheology: Comparison to Experiment

July 25, 2007
Author(s)
Nicos Martys, Chiara F. Ferraris, V Gupta, Josephine H. Cheung
Predicting the rheological properties of fresh concrete, mortars, and cement paste from first principles remains a great challenge. While progress has been made in modeling the rheological properties of idealized hard sphere-like suspensions, there is

Concordance Study Between the AmpFlSTR((R)) MiniFiler(TM) PCR Amplification Kit and Conventional STR Typing Kits

July 25, 2007
Author(s)
Carolyn R. Steffen, Margaret C. Kline, Julio J. Mulero, Robert E. Lagace, Chien-Wei Chang, Lori K. Hennessy, John M. Butler
The AmpFlSTR MiniFiler PCR Amplification kit developed by Applied Biosystems enables size reduction on eight of the larger short tandem repeat (STR) loci amplified in the Identifiler kit, which will aid recovery of information from highly degraded DNA

Conformance Checking of Access Control Policies Specified in XACML

July 24, 2007
Author(s)
Vincent C. Hu, Evan Martin, Tao Xie
Access control is one of the most fundamental and widely used security mechanisms. Access control mechanisms control which principals such as users or processes have access to which resources in a system. To facilitate managing and maintaining access

Narrow linewidth 1.5 ym sources and the thermal limit

July 23, 2007
Author(s)
William C. Swann, Nathan R. Newbury
A measured 1 Hz linewidth between a cavity-stabilized, 1535 nm cw fiber laser and the 1535-nm tooth of a stabilized fiber frequency comb is below the thermodynamic limit of the frequency comb.

Problems with Kendall's Tau

July 23, 2007
Author(s)
Mark Sanderson, Ian Soboroff
Test collections are most useful when they are reusable, that is, when they can be reliably used to rank systems that did not contribute to the pools. Pooled relevance judgments for very large collections may not be reusable for two reasons: they will be

Reliable Information Retrieval Evaluation With Incomplete and Biased Judgements

July 23, 2007
Author(s)
Stefan Buttcher, Charles L. Clarke, Peter C. Yeung, Ian Soboroff
Information retrieval evaluation based on the pooling method is inherently biased against systems that did not contribute to the pool of judged documents. This may distort the results obtained about the relative quality of the systems evaluated and thus

Slab-coupled optical waveguide devices for low-noise signal generation

July 23, 2007
Author(s)
Paul W. Juodawlkis, Frederick J. O'Donnell, Jason J. Plant, John B. Schlager
We review the use of slab-coupled optical waveguide amplifiers (SCOWAs) in low-noise mode-locked and single-frequency lasers. We also report a new single-frequency laser cavity incorporating an Er/Yb-codoped waveguide distributed Bragg-reflector that

Voltage Instability in a Simulated Fuel Cell Stack Correlated to Cathode Water Accumulation

July 22, 2007
Author(s)
Jon P. Owejan, T Trabold, Jeffrey J. Gagliardo, Robert N. Carter, Daniel S. Hussey, David L. Jacobson, Muhammad D. Arif
Single fuel cells running independently are often used for fundamental studies of water transport. It is also necessary to assess the dynamic behavior of fuel cell stacks comprised of multiple cells arranged in series, thus providing many paths for flow of
Displaying 31851 - 31875 of 73461
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