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Displaying 25176 - 25200 of 73697

Electron beam heating effects during ESEM imaging of water condensation on superhydrophobic surfaces

March 1, 2011

Author(s)

Konrad Rykaczewski, John H. Scott, Andrei G. Fedorov

Nanostructured superhydrophobic surfaces show promise as promoters of dropwise condensation and may lead to significant efficiency improvements in numerous industrial processes. Droplets with diameters below ~10 µm account for the majority of the heat

Geometric effects when measuring small holes with micro contact probes.

March 1, 2011

Author(s)

Jack A. Stone Jr., Balasubramanian Muralikrishnan, Chittaranjan Sahay

A coordinate measuring machine with a suitably small probe can be used to measure micro-features such as the diameter and form of small holes (often about 100 micrometers in diameter). When measuring small holes, the clearance between the probe tip and the

High Pressure Release and Dispersion of Hydrogen in a Partially Enclosed Compartment

March 1, 2011

Author(s)

Kuldeep R. Prasad, Thomas G. Cleary, William M. Pitts, Jiann C. Yang

The study of compressed hydrogen release from high-pressure storage systems has practical application for hydrogen and fuel cell technologies. Such releases may occur either due to accidental damage to a storage tank or connecting piping, or direct PRD

Impact of an Aortic Valve Implant on Body Surface UWB Propagation: A Preliminary Study

March 1, 2011

Author(s)

Kamran Sayrafian, Wen-Bin Yang

Efficient transceiver design in body area networks requires in-depth understanding of the propagation channel which in this case involves the human body. Several studies have been done to characterize RF propagation on the body surface and determine the

Interrelationship among Li+ diffusion, Charge, and Magnetism for 7LiMn2O4 and 7Li1.1Mn1.9O4 -Elastic, inelastic, and quasielastic neutron scattering-

March 1, 2011

Author(s)

Kazuya Kamazawa, Hiroshi Nozkai, Masashi Harada, Kazuhiko Mukai, Jun Sugiyama, Yutaka Ikedo, Kazuki Iida, Taku J. Sato, Yiming Qiu, Madhu Sudan Tyagi

Managing Information Security Risk: Organization, Mission, and Information System View

March 1, 2011

Author(s)

Ronald S. Ross

The purpose of Special Publication 800-39 is to provide guidance for an integrated, organization-wide program for managing information security risk to organizational operations (i.e., mission, functions, image, and reputation), organizational assets

Nanoelectronics Lithography

March 1, 2011

Author(s)

Stephen Knight, Vivek Prabhu, John H. Burnett, James Alexander Liddle, Christopher Soles, Alain C. Diebold

This is a compiled chapter that will be included into the Handbook of Nanophysics.

Technical Study of the Sofa Super Store Fire - South Carolina, June 18, 2007:

March 1, 2011

Author(s)

Nelson P. Bryner, Stephen P. Fuss, Bryan W. Klein, Anthony D. Putorti

Temperature Stabilization System with Millikelvin Gradients for Air Refractometry Measurements Below the 10^-8 Level

March 1, 2011

Author(s)

Patrick F. Egan, Jack A. Stone Jr.

Refractometry of air is a central problem for interferometer-based dimensional measurements. Refractometry at the 10−9 level is only valid if air temperature gradients are controlled at the millikelvin (mK) level. Very precise tests of secondgeneration

The SIM Time Network

March 1, 2011

Author(s)

Michael A. Lombardi, Andrew N. Novick, J. Mauricio Lopez-Romero, Francisco Jimenez, Eduardo de Carlos Lopez, Jean-Simon Boulanger, Raymond Pelletier, Ricardo de Carvalho, Raul Solis, Harold Sanchez, Carlos A. Quevedo, Gregory Pascoe, Daniel Perez, Eduardo Bances, Leonardo Trigo, Victor Masil, Henry Postigo, Anthony Questelles

The Sistema Interamericano de Metrologia (SIM) is a regional metrology organization (RMO) whose members are the national metrology institutes (NMIs) located in the 34 nations of the Organization of American States (OAS). The SIM/OAS region extends

Thermal Correction to the Molar Polarizability of a Boltzmann Gas (Brief Report)

March 1, 2011

Author(s)

Ulrich D. Jentschura, M. Puchalski, Peter Mohr

The metrology of fundamental quantities in atomic physics has been crucial for a number of advanced determinations of fundamental constants. In addition to very accurate frequency measurements, the molar polarizability of atomic gases has recently been

Unwanted Combustion Enhancement by Potential Halon Replacements: Thermodynamic Considerations

March 1, 2011

Author(s)

Gregory T. Linteris

It is desirable to replace Halon 1301, CF3Br, as the fire suppressant used in cargo bay fire suppression. Unfortunately, some candidate agents for replacing Halon 1301, in particular C2HF5, C3H2F3Br, C6F12O, were found to create greater pressure rise in an

Communicating the Emergency: Preliminary findings on the elements of an effective public warning message

February 28, 2011

Author(s)

Erica D. Kuligowski

When an emergency occurs, it is not always sufficient to simply initiate alarm bells. Individuals may not know what the alarm bell means and, in turn, may respond inappropriately to its sound. Many buildings have installed mass notification or emergency

Conformance Test Architecture for Biometric Data Interchange Formats - Version Beta 2.0

February 28, 2011

Author(s)

Fernando L. Podio, Dylan J. Yaga, Mark Jerde

The success of biometric applications is particularly dependent on the interoperability of biometric systems. Deploying these systems requires a comprehensive portfolio of biometric standards developed in support of interoperability and data interchange. A

Coupling Thermodynamics and Digital Image Models to Simulate Hydration and Microstructure Development of Portland Cement Pastes

February 28, 2011

Author(s)

Jeffrey W. Bullard, Barbara Lothenbach, Paul E. Stutzman, Kenneth A. Snyder

Equilibrium thermodynamic calculations, coupled to a kinetic model for the dissolution rates of clinker phases, have been used in recent years to predict the time-dependent phase assemblage in hydrating cement pastes. We couple this approach to a 3D

Injection-level-dependent internal quantum efficiency and lasing in low-defect GaN nanowires

February 28, 2011

Author(s)

John B. Schlager, Norman A. Sanford, Kristine A. Bertness, Alexana Roshko

Measurements of temperature-dependent and time-resolved photoluminescence (PL) on individual GaN nanowires revealed PL lifetimes and values of internal quantum efficiency (IQE) that increased with excitation fluence. With sufficient injection levels

It's All About The Benjamins: Fair Trade botnets and incentivizing users to ignore security advice

February 28, 2011

Author(s)

Serge M. Egelman, Nicolas Christin, Timothy Vidas, Jens Grossklags

We examine the cost for an attacker to pay users to execute arbitrary code---potentially malware. We created an Amazon's Mechanical Turk task wherein users were asked to download and run for an hour an executable we wrote. While this program was benign

Model Checking for Verification of Mandatory Access Control Models and Properties

February 28, 2011

Author(s)

Chung Tong Hu, David R. Kuhn, Tao Xie, J Hwang

Mandatory access control (MAC) mechanisms control which users or processes have access to which resources in a system. MAC policies are increasingly specified to facilitate managing and maintaining access control. However, the correct specification of the

NIST SP 500-268, Source Code Security Analysis Tool Function Specification Version 1.1

February 28, 2011

Author(s)

Elizabeth N. Fong, Paul E. Black, Michael J. Kass, Hsiao-Ming M. Koo

Software assurance tools are a fundamental resource to improve assurance in today's software applications. Some tools analyze software requirements or design models to help determine if an application is secure. Others analyze source code or executables

Photon antibunching from a single lithographically defined InGaAs/GaAs quantum dot

February 28, 2011

Author(s)

Varun B. Verma, Martin J. Stevens, Kevin L. Silverman, Neville Dias, Akash Garg, James J. Coleman, Richard P. Mirin

We demonstrate photon antibunching from a single lithographically defined quantum dot fabricated by electron beam lithography, wet chemical etching, and overgrowth of the barrier layers by metalorganic chemical vapor deposition. Measurement of the second

Preparation and Characterization of Physical Gels based on Ionic Liquid and Poly(vinyl alcohol)

February 28, 2011

Author(s)

Joonsung (. Yoon, Hae-Jeong Lee, Christopher Stafford

We report the preparation and characterization of physical gels using mixtures of poly(vinyl alcohol) (PVOH) and a high melting ionic liquid (IL), 1-ethylpyridinium bromide. Similar to PVOH hydrogels, these mixtures show elastic responses in uniaxial

Real-time polarization microscopy for probing local distributions of biomolecules

February 28, 2011

Author(s)

Jeeseong Hwang, Ji Y. Lee, John F. Lesoine, Hyeong G. Kang, Matthew L. Clarke, Robert C. Chang

We present real-time, full-field, fluorescence polarization microscopy and its calibration and validation methods to monitor the absorption dipole orientation of fluorescent molecules. A quarter-wave plate, in combination with a liquid crystal variable

Dispersion Stability of Nanoparticles in Ecotoxicological Investigations: A Comparison of Different Techniques

February 26, 2011

Author(s)

Ratna Tantra, Shingheng Jing, Siva Kaliyappan, Nicholas Walker, James Noble, Vincent A. Hackley

One of the main challenges in nanoecotoxicological investigations is in the selection of the most suitable measurement methods and protocols for nanoparticle characterisation. Several parameters have been identified as being important as they govern

Stable isotope-labeling of DNA repair proteins, and their purification and characterization

February 26, 2011

Author(s)

M Miral Dizdar, Prasad T. Reddy, Pawel Jaruga, Bryant C. Nelson

Reduced DNA repair capacity is associated with increased risk for a variety of disease processes including carcinogenesis. Thus, DNA repair proteins have the potential to be used as important predictive, prognostic and therapeutic biomarkers in cancer and

Charge States of y Ions in the Collision-Induced Dissociation of Doubly Charged Tryptic Peptide Ions

February 25, 2011

Author(s)

Pedatsur Neta, Stephen E. Stein

Bonds that break in collision-induced dissociation (CID) are often weakened by a nearby proton, which can, in principle, be carried away by either of the product fragments. Since peptide backbone dissociation is commonly charge-directed, relative

Advanced communications
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Buildings and Construction
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