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Displaying 22976 - 23000 of 74202

Effect of Al2O3 Nanolubricant on R134a Pool Boiling Heat Transfer

September 8, 2012
Author(s)
Mark A. Kedzierski
This paper quantifies the influence of Al2O3 nanoparticles on the pool boiling performance of R134a/polyolester mixtures on a roughened, horizontal, flat surface. Nanofluids are liquids that contain dispersed nano-size particles. A lubricant based

100-Fold Reduction of Electric-Field Noise in an Ion Trap Cleanded with In Situ Argon-Ion-Beam Bombardment

September 7, 2012
Author(s)
Dustin Hite, Yves Colombe, Andrew C. Wilson, Kenton R. Brown, Ulrich J. Warring, Robert Jordens, John D. Jost, David P. Pappas, Dietrich Leibfried, David J. Wineland, Kyle McKay
Anomalous heating of trapped atomic ions is a major obstacle to their use as quantum bits in scalable quantum computers. The physical origin of this electric field noise is not fully understood, but experimental evidence suggests that it emanates from the

Anisotropy induced Feshbach resonances in a quantum dipolar gas of magnetic atoms.

September 7, 2012
Author(s)
A Petrov, Svetlana A. Kotochigova, Eite Tiesinga
We explore the anisotropic nature of Feshbach resonances in the collision between ultracold magnetic submerged-shell dysprosium atoms, which can only occur due to couplings to rotating bound states. This is in contrast to well-studied alkali-metal atom

Observation of spin-valve effect in Alq3 using a low work function metal

September 7, 2012
Author(s)
Hyuk-Jae Jang, Kurt Pernstich, David J. Gundlach, Oana Jurchescu, Curt A. Richter
We present the observation of magnetoresistance in Co/Ca/Alq3/Ca/NiFe spin-valve devices. Thin Ca layers contacting 150 nm thick Alq3 enable the injection of spin-polarized electrons into Alq3 due to engineering of the band alignment. The devices exhibit

Boundary Discovery in Complex Systems

September 5, 2012
Author(s)
Eric D. Simmon, Joseph Chalfoun, Arthur Griesser
Many of today’s extremely complex meta-systems are cross-domain, they require development by multiple stakeholder groups with different goals each implementing a sub-set of the functionality required for the entire meta-system to operate. As these systems

"A Game About Standards"

September 4, 2012
Author(s)
Erik Puskar
The National Institute of Standards and Technology’s Standards Coordination Office offers training to government agencies on standards, conformity assessment and related topics. One such course, Setting Standards: A Simulation Exercise in Strategy and

Annual Report of the National Earthquake Hazards Reduction Program for Fiscal Year 2011

September 4, 2012
Author(s)
John(Jack) R. Hayes Jr., Steven L. McCabe, Edward Laatsch, Joy Pauschke, Bill Leith, John Filson, Tina M. Faecke
This report about the National Earthquake Hazards Reduction Program (NEHRP) during fiscal year 2011 is submitted to Congress by the Interagency Coordinating Committee of NEHRP, as required by the Earthquake Hazards Reduction Program Reauthorization Act of

Relating Compressive Strength to Heat Release in Mortars

September 4, 2012
Author(s)
Dale P. Bentz, Tim Barrett, Igor de la Varga, William J. Weiss
Conventionally, isothermal calorimetry and ASTM C186 heat of hydration results are reported on a per mass of cement (powder) basis, with typical units being J/g cement for example. Based on the recognition that it is the filling of porosity with hydration

Ultrafast manetization enhancement in metallic multilayers driven by superdiffusive spin current

September 4, 2012
Author(s)
Thomas J. Silva, Justin M. Shaw, Hans T. Nembach, Dennis Rudolf, Chan La-O-Vorakiat, Marco Battiato, Roman Adam, Emrah Turgut, Stefan Mathias, Margaret M. Murnane, Henry C. Kapteyn, Claus M. Schneider
Uncovering the physical mechanisms that govern ultrafast charge and spin dynamics is crucial for understanding correlated matter as well as the fundamental limits of ultrafast spin-based electronics. Spin dynamics in magnetic materials can be driven by

A 10 V programmable Josephson voltage standard and its applications for voltage metrology

September 3, 2012
Author(s)
Yi-hua D. Tang, Vijay Ojha, Stephan Schlamminger, Alain Rufenacht, Charles J. Burroughs, Paul D. Dresselhaus, Samuel P. Benz
The concept of a programmable Josephson voltage standard was first proposed in 1997. Since then a significant amount of research and development work has been devoted to the fabrication of the programmable Josephson junction array and its deployment in a

Assessment of Factors Affecting Fire Performance of Mattresses: A Review

September 3, 2012
Author(s)
Rick D. Davis, Shonali Nazare, Kathryn M. Butler
An in-depth analysis of U.S. residential fire statistics shows that although the total number of fires and deaths due to mattress fires has dropped as a result of several regulatory approaches, the mattress/bedding fires continue to account for one of the

Data Quality for High Content Screening

September 3, 2012
Author(s)
YaShian Li-Baboud, Oleg Aulov, Peter Bajcsy
TO HAVE CONFIDENCE IN THE KNOWLEDGE GLEANED FROM DATA, IT IS ESSENTIAL TO VERIFY THE QUALITY OF THE DATA SOURCES AND TO HAVE A MEANS OF QUANTIFYING THE POTENTIAL UNCERTAINTIES DUE TO THE QUALITY OF DATA FOR MAKING CRITICAL, INTELLIGENT DECISIONS. HIGH

Evaluation of viability and proliferation profiles on macrophages treated with silica nanoparticles in vitro via plate-based, flow cytometry, and Coulter counter assays

September 3, 2012
Author(s)
Simona Bancos, De-Hao D. Tsai, Vincent A. Hackley, J L. Weaver, Katherine M. Tyner
Nanoparticles (NPs) are known to interfere with many high throughput cell viability and cell proliferation assays, which complicates the assessment of their potential toxic effects. The aim of this study was to compare viability and proliferation results

SRM Spotlight

September 3, 2012
Author(s)
Regina R. Montgomery
The SRM Spotlight is a newsletter published by the Measurement Services Division for users of NIST standard reference materials. The Spotlight announces new reference materials and provides information about their use. In addition, this newsletter contains

A New Limit on Time-Reversal Violation in Beta Decay

September 2, 2012
Author(s)
Hans P. Mumm, T E. Chupp, K P. Coulter, R L. Cooper, S J. Freedman, B. K. Fujikawa, A. Garcia, Gordon L. Jones, Jeffrey S. Nico, Alan K. Thompson, C A. Trull, J. F. Wilkerson, F. E. Wiefeldt
We report the results of an improved determination of the triple correlation DP • (p_e × p_v) that can be used to limit possible time-reversal invariance in the beta decay of polarized neutrons and constrain extensions to the Standard Model. Our result is

Preface

September 2, 2012
Author(s)
Andrew M. Dienstfrey, Ronald F. Boisvert
Displaying 22976 - 23000 of 74202
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