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Displaying 22251 - 22275 of 74343

A Semantic Framework for Systems Engineering Standards

March 19, 2013
Author(s)
Allison Barnard Feeney, David M. Price, Albert W. Jones
Systems engineers and asset managers create and maintain models of components and systems associated with long-lived, engineering assets. Component models come from many domains, disciplines and applications. System models typically require integration of

The Metrology of Counting Protein Particles

March 18, 2013
Author(s)
Dean C. Ripple, Michael J. Carrier, Richard E. Cavicchi, Christopher B. Montgomery, Zhishang Hu
A common degradation pathway for protein-based drugs is the growth of protein aggregates or particles. Counting and characterization of these particles is needed to assure the quality, efficacy, and safety of this type of drug. The unusual physical

The Federal Role in Cluster Formation

March 17, 2013
Author(s)
Gary W. Anderson Jr.
The answers to three related questions are critical to understanding the role of regional clusters as a key element of technology- based economic growth policy:  What drives cluster formation?  What are the economic impacts of clusters?  What policies

FACTORS INFLUENCING EXPOSURE TO ORGANOHALOGEN CONTAMINANTS IN PREDATORY BIRDS FROM COASTAL SOUTH CAROLINA, USA

March 15, 2013
Author(s)
Jessica Reiner, Jennifer Yordy, Sam Rossman, Peggy H. Ostrom, Stacy Hughes, Keely Bargnesi, James D. Elliot
Predatory bird species occupy high trophic levels and consequently are susceptible to bioaccumulating high levels of environmental contaminants. To evaluate potential risks from exposure to past- and current- use contaminants, levels of legacy contaminants

Polymer chain dynamics in weakly intercalated polymer/nanoplatelet mixtures

March 15, 2013
Author(s)
Kevin A. Masser, Hongyi Yuan, Chad R. Snyder, Alamgir Karim
The dynamics of two chemically similar type-A polymers, poly(epsilon-caprolactone) (PCL) and poly(lactic acid) (PLA) with small amounts of Cloisite 30B nanoplatelets were investigated via broadband dielectric relaxation spectroscopy. The terminal

Two-port microwave calibration at millikelvin temperatures

March 15, 2013
Author(s)
Leonardo M. Ranzani, Jose A. Aumentado, Lafe F. Spietz, Zoya Popovic
In this work we introduce a system for 2-port microwave calibration at millikelvin temperatures operating at the coldest stage of a dilution refrigerator by use of an adapted thru-reflect-line algorithm. We show that this can be an effective tool for

Vapor Phase Metal-assisted Chemical Etching of Silicon

March 14, 2013
Author(s)
Owen J. Hildreth, Daniel R. Schmidt
This work introduces and explores Vapor Phase Metal-assisted Chemical Etching (VP-MaCE) of silicon as a method to bypass some of the challenges found in traditional Liquid Phase Metal-assisted Chemical Etching (LP-MaCE). Average etch rates for Ag, Au, and

Fast, All-Optical, Zero to PI Continuously Controllable Kerr Phase Gate

March 13, 2013
Author(s)
Runbing Li, Lu Deng, Edward W. Hagley
We demonstrate a fast-responding Kerr phase gate using a room-temperature 85Rb vapor operated in a Raman gain scheme where the probe/signal wave travels “superluminally”. Continuously controllable nonlinear Kerr phase shift of the probe wave from 0 to π

The Exothermic Reaction of Fire Suppressants

March 13, 2013
Author(s)
Gregory T. Linteris, Valeri I. Babushok, Fumiaki Takahashi, Viswanath R. Katta, Oliver Meier
Several fire suppressants are under consideration to replace CF3Br for use in suppressing fires in aircraft cargo bays. In Federal Aviation Administration performance tests simulating the explosion of an aerosol can, however, the replacements HFC-125, 2-

Experimental Evidence for s-Wave Pairing Symmetry in Superconducting Cu_x}Bi_2}Se_3} Single Crystals Using a Scanning Tunneling Microscope

March 12, 2013
Author(s)
Niv Levy, Tong Zhang, Jeonghoon Ha, Fred Sharifi, Alec Talin, Young Kuk, Joseph A. Stroscio
Topological superconductors (TS) are a newly predicted phase of matter which is topologically distinct from conventional superconducting condensates of Cooper pairs. As a manifestation of its topological character, TS supports massless itinerant quasi
Displaying 22251 - 22275 of 74343
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