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Displaying 31201 - 31225 of 74360

Robust Engineering Design for Failure Prevention

July 27, 2008
Author(s)
Jeffrey T. Fong, James J. Filliben, Nathanael A. Heckert, Roland deWit, Barry Bernstein
To advance the state of the art of engineering design, we introduce a new concept on the "robustness" of a structure by measuring its ability to sustain a sudden loss of a part without causing an immediate collapse. The concept is based on the premise that

Uncertainty Estimate of Charpy Data Using a 5-factor 8-run Design of Experiments

July 27, 2008
Author(s)
Charles G. Interrante, Jeffrey Fong, James J. Filliben, N. Alan Heckert
Scatter in laboratory data with duplicates on Charpy impact tests is analyzed by identifying several sources of variability such as temperature, manganese sulfide, initial strain, mis-orientation, and notch radius in order to estimate the predictive 95%

Entangled Images from Four-Wave Mixing

July 25, 2008
Author(s)
Vincent Boyer, Alberto M. Marino, Raphael C. Pooser, Paul D. Lett
Two beams of light can be quantum mechanically entangled through correlations of their phase and intensity fluctuations. For a pair of spatially extended image-carrying light fields, the concept of entanglement can be applied not only to the entire images

Extended Huckel Tight-Binding Approach to Electronic Excitations

July 25, 2008
Author(s)
Luis C. Rincon, Anwar Hasmy-Aguilar, Carlos A. Gonzalez, Rafael Almeida
In this work we propose the application of a self-consistent Extended Huckel Tight Binding method in the computation of the absorption optical spectrum of molecules within the linear response time dependent Density Functional formalism. The Extended Huckel

Guide to General Server Security

July 25, 2008
Author(s)
Karen A. Scarfone, Wayne Jansen, Miles C. Tracy
The purpose of this document is to assist organizations in understanding the fundamental activities performed as part of securing and maintaining the security of servers that provide services over network communications as a main function. The document

Guide to Securing Legacy IEEE 802.11 Wireless Networks

July 25, 2008
Author(s)
Karen Scarfone, Derrick Dicoi, Matt Sexton, Cyrus Tibbs
The purpose of this document is to provide guidance to organizations in securing their legacy Institute of Electrical and Electronics Engineers (IEEE) 802.11 wireless local area networks (WLAN) that cannot use IEEE 802.11i. The document provides an

Forensic Protocol Filtering of Phone Managers

July 24, 2008
Author(s)
Wayne Jansen, Aurelien M. Delaitre
Phone managers are non-forensic tools sometimes used by forensic investigators to recover data from a cell phone when no suitable forensic tool is available for the device. While precautions can be taken to preserve the integrity of data on a cell phone

Mechanisms of Moisture Attack in Adhesive bonds Exposed to High Humidity

July 23, 2008
Author(s)
Kar T. Tan, Christopher C. White, Cyril Clerici, Donald L. Hunston, Bryan D. Vogt, Sushil K. Satija, Joshua E. Goldman, Kristen L. Steffens
Studies have show that certain adhesive joints exhibit a dramatic loss of strength when exposed to humidities above a certain critical value. Although much is know about this effect, questions still exist. This study combines neutron reflectivity

Infrared Absolute Calibrations Down to 10 fW in Low-Temperature Environments at NIST

July 22, 2008
Author(s)
Adriaan C. Carter, Raju V. Datla, Timothy Jung, Solomon Woods
The Low Background Infrared (LBIR) facility at the National Institute of Standards and Technology (NIST) is responsible for absolute IR radiometric calibrations (SI traceable) in low-background temperature (below 80 K) environments. IR radiometric test

Ballistic Resistance of Body Armor.

July 21, 2008
Author(s)
Kirk D. Rice, Michael A. Riley, Amanda L. Forster
This Office of Law Enforcement Standards (OLES) performance standard provides the criteria, requirements, methodology, and procedures for ballistic resistance evaluation of personal body armor, under the jurisdiction of the NIJ Compliance Testing Program

Limits of Opinion-Finding Baseline Systems

July 21, 2008
Author(s)
Ian M. Soboroff, Craig Macdonald, Ben He, Iadh Ounis
In opinion-finding, the retrieval system is tasked with re- trieving not just relevant documents, but which also express an opinion towards the query target entity. Most opinion- finding systems are based on a two-stage approach, where initially the system

Negative-Bias Temperature Instability Induced Electron Trapping

July 21, 2008
Author(s)
Jason P. Campbell, Kin P. Cheung, John S. Suehle, A Oates
Despite four decades of research, the physics responsible for the negative bias temperature instability (NBTI) in p-channel metal-oxide-silicon field-effect-transistors is still unresolved. The current NBTI debate focuses on the dominance of either a hole

Population-imbalanced fermions in harmonically trapped optical lattices

July 21, 2008
Author(s)
Menderes Iskin, Carl J. Williams
The attractive Fermi-Hubbard Hamiltonian is solved via the Bogoliubov-de Gennes formalism to analyze the ground state phases of population imbalanced fermion mixtures in harmonically trapped two-dimensional optical lattices. In the low density limit the

Relevance assessment: are judges exchangeable and does it matter?

July 21, 2008
Author(s)
Ian M. Soboroff, Peter Bailey, Nick Craswell, Alan Smeaton, Emine Yilmaz, Paul Thomas
We investigate to what extent people making relevance judgments for a reusable IR test collection are exchangeable. We consider three classes of judge: gold standard judges, who are topic origi- nators and are experts in a particular information seeking

Ultra fast quantum key distribution over a 97-km installed telecom fiber with wavelength-division-multiplexing clock synchronization

July 21, 2008
Author(s)
Akihiro Tanaka, Mikio Fujiwara, Sae Woo Nam, Yoshihiro Nambu, Seigo Takahashi, Wakako Maeda, Ken-ichiro Yoshino, Shigehito Miki, Burm Baek, Z. Wang, Akio Tajima, Masahide Sasaki, Akihisa Tomita
We demonstrated ultra fast BB84 quantum key distribution (QKD) transmission at 625 MHz clock rate through a 97 km field-installed fiber using practical clock synchronization based on wavelength-division-multiplexing (WDM). We succeeded in over-one-hour

Web Services Security: Techniques and Challenges (Extended Abstract)

July 21, 2008
Author(s)
Anoop Singhal
Web services-based computing is currently an important driver for the software industry. While several standards bodies (such as W3C and OASIS) are laying the foundation for Web services security, several research problems must be solved to make secure Web
Displaying 31201 - 31225 of 74360
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