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Displaying 46076 - 46100 of 143775

Reproducibility and Robustness of a Real-Time Microfluidic Cell Toxicity Assay

May 15, 2011
Author(s)
Gregory A. Cooksey, John T. Elliott, Anne L. Plant
Numerous opportunities exist to apply microfluidic technology to high-throughput and high-content cell-based assays. However, maximizing the value of these assays for drug discovery, screening or toxicity evaluation, for example, will require validation of

Amplification of the optical absorption cross section for aerosols of soot with a nonabsorbing coating from photoacoustic measurements

May 13, 2011
Author(s)
Pedro Bueno, Daniel K. Havey, George W. Mulholland, Joseph T. Hodges, Keith A. Gillis, Russell R. Dickerson, Michael R. Zachariah
A quantitative understanding of the absorption and scattering properties of mixed soot and aerosol particles is necessary for evaluating the Earth's energy balance. Uncertainty in the net radiative forcing of atmospheric aerosols is relatively large and

Binary amplitude holograms made from dyed photoresist

May 13, 2011
Author(s)
Quandou (. Wang, Ulf Griesmann, John H. Burnett
A method for fabricating binary amplitude holograms from a dyed photoresist is described. It is of particular interest for holograms that are used as null lenses in the form metrology of aspheric surfaces and wavefronts. A pigment that strongly absorbs

An IEEE 1451.5-802.11 Standard-based Wireless Sensor Network with Embedded WTIM

May 12, 2011
Author(s)
Eugene Song, Kang B. Lee, Steven E. Fick, Alkan Donmez
This paper introduces a reference implementation of the Institute of Electrical and Electronics Engineers (IEEE) 1451.5-802.11 standard-based wireless sensor network (WSN) developed at the National Institute of Standards and Technology (NIST). The WSN

Rotational Grain Boundaries in Graphene

May 12, 2011
Author(s)
Eric J. Cockayne, Gregory M. Rutter, N Guisinger, Jason Crain, Joseph A. Stroscio, Phillip First
Defects in graphene are of interest for their effect on electronic transport in this two-dimensional material. Point defects of typically two-fold and three-fold symmetry have long been observed in scanning tunneling microscopy (STM) studies of graphite

Imaging Cells in Polymer Scaffolds by X-Ray Microcomputed Tomography

May 11, 2011
Author(s)
Shauna M. Dorsey, Sheng Lin-Gibson, Carl Simon Jr.
We have investigated the ability of X-ray microcomputed tomography (CT) to make quantitative, three-dimensional (3D) measurements of cell adhesion and proliferation in polymeric tissue engineering scaffolds. The most common method for examining cells in

Neutron Backscattering

May 11, 2011
Author(s)
B. Frick, Dan A. Neumann
We review the status of neutron backscattering spectrometers on reactors and spallation sources including the most recent instrument developments. After setting the stage by looking briefly at the history of backscattering instruments, we review the

Of Passwords and People: Measuring the Effect of Password-Composition Policies

May 11, 2011
Author(s)
Serge M. Egelman, Saranga Komanduri, Richard Shay, Patrick G. Kelley, Michelle L. Mazurek, Lujo Bauer, Nicolas Christin, Lorrie F. Cranor
Text-based passwords are the most common mechanism for authenticating humans to computer systems. To prevent users from picking passwords that are too easy for an adversary to guess, system administrators adopt password-composition policies (e.g

Recent developments in the NIST Atomic Databases

May 11, 2011
Author(s)
Alexander Kramida
New versions of the NIST Atomic Spectra Database (ASD, v. 4.0) and three bibliographic databases (Atomic Energy Levels and Spectra, v. 2.0, Atomic Transition Probabilities, v. 9.0, and Atomic Line Broadening and Shapes, v. 3.0) have recently been released
Displaying 46076 - 46100 of 143775
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