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Displaying 15751 - 15775 of 17286

Bootstrap method versus analytical approach for estimating uncertainty of measure in ROC analysis on large datasets

July 17, 2018

Author(s)

Jin Chu Wu, Alvin F. Martin, Gregory A. Sanders, Raghu N. Kacker

The nonparametric two-sample bootstrap is employed to estimate uncertainties of statistics of interest in receiver operating characteristic (ROC) analysis on large datasets with/without data dependency due to multiple use of the same subjects in many

Evaluation of binary and ternary refrigerant blends as replacements for R134a in an air-conditioning system

July 9, 2018

Author(s)

Ian H. Bell, Piotr A. Domanski, Gregory T. Linteris, Mark O. McLinden

We investigate refrigerant blends as possible low-GWP (global warming potential) alternatives for R134a in an air-conditioning application. We carried out an exhaustive screening of the binary and ternary blends possible among a list of 10 pure

Commissioning the SALT High Resolution Spectrograph's Iodine Cell

July 6, 2018

Author(s)

Lisa A. Crause, R P. Butler, Gillian Nave, Rudi Kuhn, Blaine Lomberg, Alexei Kniazev, Steven M. Crawford, Eric Depagne

… Transform Spectrometer at the National Institute of Standards and Technology before incorporation into the HRS HS …

Nanometer Positional Control using Magnetic Suspension for Vacuum-to-Air Mass Metrology

July 2, 2018

Author(s)

Nicholas Vlajic, Melissa L. Davis, Corey A. Stambaugh

… in vacuum, at the United States National Institute of Standards and Technology. More specifically, the control …

Heat Capacity of Saturated and Compressed Liquid Dimethyl Ether at Temperatures from (132 to 345) K and at Pressures to 35 MPa

April 11, 2018

Author(s)

Joe W. Magee, Jiangtao Wu

Molar heat capacities at constant volume (C_v) of dimethyl ether have been measured with an adiabatic calorimeter. Temperatures range from the triple point to 345 K, and pressures up to 35 MPa. Measurements were conducted on liquid in equilibrium with its

Determining Mean Recurrence Intervals for Updated Wind Maps in ASCE 7-16

February 16, 2018

Author(s)

Therese P. McAllister, Naiyu Wang, Bruce Ellingwood

ASCE Standard 7 is moving toward load requirements that are consistent with reliability-based design goals characteristic of performance-based engineering (PBE). As part of this move, reliability analyses were conducted using updated wind data to determine

NIST Channel Sounder Overview and Channel Measurements in Manufacturing Facilities

November 8, 2017

Author(s)

Jeanne T. Quimby, Richard Candell, Catherine A. Remley, David R. Novotny, Joseph Diener, Peter B. Papazian, Alexandra Curtin, Galen H. Koepke

… Systems for Industrial Environments as part of the NIST Standards for Manufacturing Systems Program. The key idea for …

Results of an International Comparison of Activity Measurements of 68Ge

November 7, 2017

Author(s)

Jeffrey T. Cessna, Ryan P. Fitzgerald, Brian E. Zimmerman, Lizbeth Laureano-Perez, Denis E. Bergeron

… has been performed. The National Institute of Standards and Technology (NIST) served as the pilot …

Development of large aperture projection scatterometry for catalyst loading evaluation in proton exchange membrane fuel cells

August 12, 2017

Author(s)

Michael T. Stocker, Bryan M. Barnes, Martin Y. Sohn, Eric S. Stanfield, Richard M. Silver

… approach developed at the National Institute of Standards and Technology specifically for fuel cell …

Design and Analysis of Optimization Algorithms to Minimize Cryptographic Processing in BGP Security Protocols

July 1, 2017

Author(s)

Vinay Sriram, Douglas Montgomery

The Internet is subject to attacks due to vulnerabilities in its routing protocols. One proposed approach to attain greater security is to cryptographically protect network reachability announcements exchanged between Border Gateway Protocol (BGP) routers

Peptide Valency Plays an Important Role in the Activity of a Synthetic Fibrin-Crosslinking Polymer

July 1, 2017

Author(s)

Robert J. Lamm, Esther B. Lim, Kathleen Weigandt, Lilo D. Pozzo, Nathan J. White, Suzie H. Pun

Therapeutic polymers have the potential to improve the standard of care for hemorrhage, or uncontrolled bleeding, as synthetic hemostats. PolySTAT, a fibrin-crosslinking peptide-polymer conjugate, has the capacity to rescue fibrin clot formation and

Imposing Fine-grain Next Generation Access Control over Database Queries

May 25, 2017

Author(s)

David F. Ferraiolo, Serban I. Gavrila, Gopi Katwala, Joshua D. Roberts

In this paper we describe a system that leverages ANSI/INCITS Next Generation Access Control (NGAC) standard called Next-generation Database Access Control (NDAC) for accessing data in tables, rows, and columns in existing RDBMS products. NDAC imposes

Stuck in a moment: A view from the MIRE

April 20, 2017

Author(s)

Patrick Egan, Jack A. Stone Jr., Jacob Edmond Ricker, Jay H. Hendricks

… The next-generation pressure standards will be realized via gas density and the equation …

Model (At Least) Twice, Build Once: Experiences with the Design-Bid-Build Process for Solar Photovoltaic Arrays

March 21, 2017

Author(s)

Brian P. Dougherty, Matthew Boyd

… Gaithersburg, Maryland campus of the National Institute of Standards and Technology. A design-bid-build process was …

Quality assurance and quality control processes: Summary of a metabolomics community questionnaire

March 6, 2017

Author(s)

Warwick Dunn, David Broadhurst, Arthur S. Edison, Mark Viant, Dan Bearden, Richard Beger, Claude Guillou

The Metabolomics Society Data Quality Task Group (DQTG) developed a questionnaire regarding quality assurance (QA) and quality control (QC) to provide baseline information about current QA and QC practices applied in the international metabolomics

Development of a Real-Time Control System Architecture for Automated Steel Construction

February 19, 2017

Author(s)

Kamel S. Saidi, Robert W. Bunch, Alan M. Lytle, Frederick M. Proctor

… The National Institute of Standards and Technology (NIST) is developing a real-time …

Enhancing Sensitivity of Atomic Force Microscopy for Characterization ofSurface Chemical Heterogeneity

February 19, 2017

Author(s)

Xiaohong Gu, Tinh Nguyen, Michael J. Fasolka, Mark R. VanLandingham, Jonathan W. Martin

… designed and fabricated at the National Institute of Standards and Technology. The relative humidity in the …

Beyond IRBs: Designing Ethical Review Processes for Big Data Research

January 25, 2017

Author(s)

Simson L. Garfinkel

… is likely to be even less successful than self‐regulated standards for data collection, advertising, and a variety of …

Goniometric and hemispherical reflectance and transmittance measurements of fused silica diffusers

October 11, 2016

Author(s)

Paul Lemaillet, Heather Patrick, Thomas Germer, Leonard Hanssen, B. Carol Johnson, Georgi T. Georgiev

… normal illumination provided by the National Institute of Standards and Technology (NIST)'s Goniometric Optical Scatter …

New Component-Based Model for Single Plate Shear Connections with Pretension and Pinched Hysteresis

September 23, 2016

Author(s)

Jonathan M. Weigand

The behavior of single plate shear connections under extreme loads is complex. However, component-based connection models provide a natural framework for modeling these complexities, by capturing both the individual behaviors of the connection components

NIST Programs to Advance Accurate, Internationally-Recognized Stack Emissions Measurements

September 15, 2016

Author(s)

Aaron Johnson, Iosif Isaakovich Shinder, Rodney A. Bryant, JohnPaul R. Abbott, Keith A. Gillis, Joey Boyd, James Filla, Michael R. Moldover

… measurements are traceable to NIST via certified gas standards, but no path of flow traceability exist. Moreover, …

A House? A Laboratory? NIST's Net-Zero Energy Residential Test Facility

September 14, 2016

Author(s)

Arthur H. Fanney

… In 2012 the National Institute of Standards and Technology (NIST) completed the construction of …

Modeling and Measuring Chloride Ingress into Cracked Mortar

August 7, 2016

Author(s)

Scott Jones, Jeffery Davis, John L. Molloy, John R. Sieber, Dale P. Bentz

… counts over the scan domain. The data is calibrated using standards with known chloride concentration and the results …

Invited Article: MiniTimeCube

June 13, 2016

Author(s)

Hans P. Mumm

… deployed and being tested at the National Institute of Standards and Technology (NIST) nuclear reactor (20 MWth) in …

Sub-Femto-g Free Fall for Space-Based Gravitational Wave Observatories: LISA Pathfinder Results

June 7, 2016

Author(s)

Michele Armano, Heather Audley, Gerard Auger, Jonathon Baird, Massimo Bassan, Pierre Binetruy, Michael Born, Daniele Bortoluzzi, Nico Brandt, Antonella Cavalleri, Andrea Cesarini, Giacomo Ciani, Giuseppe Congedo, Mike Cruise, Karsten Danzmann, Marcus de Deus Silva, Rosario De Rosa, Marc Diaz Aguilo, Luciano Di Fiore, Ingo Diepholz, George Dixon, Rita Dolesi, Luigi Ferraioli, Valerio Ferroni, Walter Fichter, Reinhold Flatscher, Antonio F. Garcia Marin, Cesar Garcia Marirrodriga, Ruediger Gerndt, Ferran Gibert, Domenico Giardini, Roberta Giusteri, Felipe Guzman, Aniello Grado, Catia Grimani, Adrien Grynagier, Jonathan Grzymisch, Ian Harrison, Gerhard Heinzel, Martin Hewitson, Daniel Hollington, David Hoyland, Mauro Hueller, Henri Inchauspe, Oliver Jennrich, Philippe Jetzer, Ulrich Johann, Bengt Johlander, Nico Karnesis, Natalia Korsakova, Christian Killow, Alberto Lobo, Ivan Lloro, Li Liu, Juan P. Lopez Zaragoza, Rolf Maarschalkerweerd, Davor Mance, Victor Martin, Luis Martin Polo, Joseph Martino, Fernando Martin Porqueras, Sean Madden, Ignacio Mateos, Paul McNamara, Jose Mendes, Luis Mendes, Anneke Monsky, Daniele Nicolodi, Miquel Nofrarias, Sarah Paczkowski, Michael Perreur-Lloyd, Antoine Petiteau, Paolo Pivato, Eric Plagnol, Pierre Prat, Ulrike Ragnit, Boutheina Rais, Juan Ramos Castro, Jens Reiche, David I. Robertson, Hans Rozemeijer, Francisco Rivas, Giuliana Russano, Josep Sanjuan, Paolo Sarra, Alexander Schleicher, Diana Shaul, Jacob Slutsky, Carlos Sopuerta, Ruggero Stanga, Frank Steier, Damien Texier, James I. Thorpe, Christian Trenkel, Hai-Bo Tu, Daniele Vetrugno, Stefano Vitale, Vinzenz Wand, Gudrun Wanner, Henry Ward, C Warren, Peter Wass, David Wealthy, William J. Weber, Lennart Wissel, Andreas Wittchen, Andrea Zambotti, Carlo Zanoni, Tobias Ziegler, Peter Zweifel

We report the first results of the LISA Pathfinder in-flight experiment. The results demonstrate that two free-falling reference test masses, such as those needed for a space-based gravitational wave observatory like LISA, can be put in free fall with a

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