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Displaying 18276 - 18300 of 74047

Measuring Freeze and Thaw Damage in Mortars Containing Deicing Salt Using a Low Temperature Longitudinal Guarded Comparative Calorimeter and Acoustic Emission (AE-LGCC)

June 23, 2014
Author(s)
Yaghoob Farnam, Dale P. Bentz, Aaron R. Sakulich, Daniel R. Flynn, Jason Weiss
Deicing salts are often applied to the surface of pavements and bridge decks in the winter to melt ice; thereby improving safety for the travelling public. In this paper, the influence of NaCl deicing salt on freezing and thawing temperatures of pore

A Cognitive-Behavioral Framework of User Password Management Lifecycle

June 22, 2014
Author(s)
Yee-Yin Choong
Passwords are the most commonly used mechanism in controlling users’ access to information systems. Little research has been established on the entire user password management lifecycle from the start of generating a password, maintaining the password

Character Strings, Memory and Passwords: What a Recall Study Can Tell Us.

June 22, 2014
Author(s)
Brian C. Stanton, Kristen Greene
Many users must authenticate to multiple systems and applications, often using different passwords, on a daily basis. At the same time, the recommendations of security experts are driving increases in the required character length and complexity of

Development of a Scale to Assess the Linguistic and Phonological Difficulty of Passwords

June 22, 2014
Author(s)
Jennifer R. Bergstrom, Stefan A. Frisch, David C. Hawkins, Joy Hackenbracht, Kristen K. Greene, Mary Theofanos, Brian Griepentrog
Increasingly, institutions are requiring or recommending that their employees use secure, system-generated passwords. It is not clear how well linguistic and phonological language properties map onto complex, randomly-generated passwords. Passwords

I Can't Type That! P@$$w0rd Entry on Mobile Devices

June 22, 2014
Author(s)
Kristen Greene, Melissa A. Gallagher, Brian C. Stanton, Paul Y. Lee
Given the numerous constraints of onscreen keyboards, such as smaller keys and lack of tactile feedback, remembering and typing long, complex passwords — an already burdensome task on desktop computing systems —becomes nearly unbearable on small mobile

The Decline in Reported Smoking-Caused Wildfires

June 21, 2014
Author(s)
David T. Butry, Jeffrey P. Prestemon, Douglas S. Thomas
The number of smoking-caused wildfires has been falling nationwide. On national forests in 2011, smoking-caused wildfires represented only 10 % of their 1980 level. No other cause of wildfire has experienced this level of decline. Using U.S. Forest Service

Computational Modeling and Validation of Aerosol Deposition in Ventilation Ducts

June 20, 2014
Author(s)
Kristopher J. Overholt, Jason Floyd, Ofodike A. Ezekoye
In fire models, the accurate prediction of aerosol/soot concentrations in the gas phase and aerosol/soot deposition thicknesses in the condensed phase is important for a wide range of applications, including human egress calculations, heat transfer in

Figure metrology for x-ray focusing mirrors with Fresnel holograms and photon sieves

June 20, 2014
Author(s)
Ulf Griesmann, Johannes A. Soons, Quandou (. Wang, Lahsen Assoufid
We report on interferometric measurements of the figure error of an ultra-precise mirror with the shape of an elliptical toroid for the diffraction limited focusing of hard x-rays from an undulator x-ray source. We describe measurement configurations using

Metrology Needs for 2.5D/3D Interconnect

June 20, 2014
Author(s)
Victor H. Vartanian, Richard A. Allen, Klaus Humler, Steve Olsen, Brian Sapp, Larry Smith
This chapter will focus on the metrology steps to support 2.5D and 3D reference flows employing via-mid copper through-silicon via (TSV) processing, wafer thinning, and backside processing using a handle wafer and chip-to-chip bonding. Reference flows that

Monitoring Process Variability for Stationary Process Data

June 20, 2014
Author(s)
Nien F. Zhang, Adam L. Pintar
Processes that arise naturally, e.g., from manufacturing or the environment, often exhibit complicated autocorrelation structures. When monitoring such a process for changes in variance, accounting for that autocorrelation structure is critical. While

Predictive analytics for manufacturing sustainability performance

June 20, 2014
Author(s)
Seungjun Shin, Jungyub Woo, Sudarsan Rachuri
The Smart Manufacturing (SM) system should be capable of handling high volume data, process high velocity data and manipulate high variety data. Big data analytics can enable timely and accurate insights using machine learning and predictive analytics to

Standoff passive video imaging at 350 GHz with 251 superconducting detectors

June 20, 2014
Author(s)
Daniel T. Becker, James A. Beall, Hsiao-Mei Cho, Gene C. Hilton, Nicholas G. Paulter Jr., Carl D. Reintsema, Robert E. Schwall, Cale Gentry, Ilya Smirnov, Peter Ade, W D. Duncan, Mark Halpern, Carole Tucker
Millimeter wavelength radiation holds promise for detection of security threats at a distance, including suicide bomb belts and maritime threats in poor weather. The high sensitivity of superconducting Transition Edge Sensor (TES) detectors makes them

Incoherent Quasielastic Neutron Scattering Study of the Relaxation Dynamics in Molybdenum-Oxide Based Keplerate Type Nanocages

June 19, 2014
Author(s)
Antonio Faraone, Emiliano Fratini, Somenath Garai, Achim Muller, Madhu Sudan Tyagi, Timothy Jenkins, Eugene Mamontov, Rick L. Paul, John R. Copley, Piero Baglioni
The single particle relaxation dynamics of hydrogen atoms in different oxomolybdate Keplerate type nanocages characterized by a (metal) 30 icosidodecahedron and a size of {approximately equal}25 A were studied using Incoherent Quasielastic Neutron

Effects of Temperature on Surface Accumulation and Release of Silica Nanoparticles in an Epoxy Nanocoating Exposed to UV Radiation

June 16, 2014
Author(s)
Chun-Chieh Tien, Ching-Hsuan Chang, Bernard Hao-Chih Liu, Deborah Jacobs, Savelas A. Rabb, Lee L. Yu, Tinh Nguyen, Li Piin Sung
Polymer nanocoatings are increasingly used outdoors and in harsh environments. However, because most common polymers degraded by the weathering elements, nanoparticles in polymer nanocoatings may be released into the environments. Such nanoparticle release
Displaying 18276 - 18300 of 74047