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NIST Authors in Bold

Displaying 11926 - 11950 of 73927

Ventilation, IAQ and Filtration in a Net Zero Energy House

May 24, 2018
Author(s)
Andrew K. Persily, Lisa C. Ng, Dustin G. Poppendieck, Steven J. Emmerich
The Net Zero Energy Residential Test Facility (NZERTF) was constructed at the National Institute of Standards and Technology (NIST) to support the development and adoption of cost-effective net zero energy designs and technologies. The 250 m2 two-story

Absence of diffuse double layer effect on the vibrational properties and oxidation of chemisorbed carbon monoxide on a Pt(111) electrode

May 23, 2018
Author(s)
Marta C. Figueiredo, Dennis Hiltrop, Ravishankar Sundararaman, Kathleen Schwarz, Marc Koper
In this work we investigate the effects of the diffuse double layer thickness on the electrochemical Stark tuning and oxidation of carbon monoxide at Pt(111) surfaces in perchloric acid solution. The diffuse double layer thickness was modified by changing

Generalized auto-balanced Ramsey spectroscopy of clock transitions

May 23, 2018
Author(s)
V. I. Yudin, A. V. Taichenachev, M. Y. Basalaev, T. Zanon-Willette, Juniper Wren Y. Pollock, Moshe Shuker, Elizabeth Donley, John Kitching
We develop the theory for generalised auto-balanced Ramsey spectroscopy (GABRS), which allows probe-field-induced shifts in atomic clocks to be eliminated. This universal two-loop method, apart from the clock frequency omega, requires the use of an

Protecting Software Integrity Through Code Signing

May 23, 2018
Author(s)
David A. Cooper, Leonard Feldman, Gregory A. Witte
This bulletin summarizes the information found in the white paper Security Considerations for Code Signing, which describes features and architectural relationships of typical code signing solutions that are widely deployed today. The paper also defines

Mobile Application Security Exercise (MASE): Final Report

May 22, 2018
Author(s)
Michael A. Ogata
Mobile applications have become an integral part in the mission of the federal government and public safety. There exist many techniques that seek to assure these applications are free from software bugs and vulnerabilities. However, a unified list of

Revision of the ionization energy of neutral carbon

May 22, 2018
Author(s)
W L. Glab, Haris Kunari, Alexander Kramida
This publication describes a re-analysis of previously published data on neutral carbon (C I) utilizing critically examined and improved values for the line energies of the absorption spectrum of molecular iodine to calibrate the transition energies of C I

Structure and Dynamics of a Graphene Melt

May 22, 2018
Author(s)
Jack F. Douglas, Sinan Keten, Fernando Vargas-Lara, Wenjie Xia
We show by molecular dynamics simulation that bulk materials composed of graphene nanosheets exhibit fluid-like properties similar to linear polymer melts at elevated temperatures and that these materials transform into a glassy or “foam” state at low

A portable cold 87Rb atomic clock with frequency instability at one day in the 10 -15 range

May 21, 2018
Author(s)
Joshua J. Savory, F G. Ascarrunz, L I. Ascarrunz, Alessandro L. Banducci, M C. Delgado Aramburo, Y Dudin, Steven R. Jefferts
We present a small portable cold 87Rubidium atomic clock with frequency uncertainty of less than 𝟑 × 𝟏𝟎 −𝟏𝟓 in one day of averaging time. The clock is under development at SpectraDynamics for the Defense Advanced Research Projects Agency (DARPA) Portable

Effect of Local Oscillator Performance on UWB Based Indoor Localization System

May 21, 2018
Author(s)
Archita Hati, Fabio C. Da Silva, Vladislav P. Gerginov, Craig W. Nelson
We discuss the performance of a commercial Ultra-wideband (UWB) ranging technique for indoor localization. We study the influence of local oscillator's phase noise and its frequency drifts due to temperature variations on the range estimation and ranging

Emerging investigators in materials science 2017-2018

May 21, 2018
Author(s)
Frank W. DelRio, Robert Riggleman
Materials Research Express is a multidisciplinary journal devoted to publishing cutting-edge experimental and theoretical research on the processing, structure, properties, and performance of all classes of materials, with an emphasis on the following

Guide to Industrial Wireless Systems Deployments

May 21, 2018
Author(s)
Richard Candell, Mohamed T. Hany, Kang B. Lee, Yongkang Liu, Jeanne T. Quimby, Catherine A. Remley
This document is intended to be a practical guide used by engineers and managers facilitating them to go through the process of defining the objectives of their wireless systems and examining the environments where the wireless systems are to be deployed

NIST Micronutrients Measurement Quality Assurance Program: Spring and Fall 1987 Comparability Studies-Results for Round Robins IX and XI Fat-Soluble Vitamins and Carotenoids in Human Serum

May 21, 2018
Author(s)
Jeanice M. Brown Thomas, David L. Duewer, Margaret C. Kline, Willie May, Emil Schonberger
From 1984 to 2017, the National Institute of Standards and Technology coordinated the Micronutrients Measurement Quality Assurance Program (MMQAP) for laboratories that measure fat- soluble vitamins and carotenoids in human serum and plasma. This report

Literature Review of Metal Additive Manufacturing Defects

May 17, 2018
Author(s)
Felix H. Kim, Shawn P. Moylan
Additive manufacturing (AM) is a revolutionary manufacturing technique, which is expected to reshape the future manufacturing industries. While various materials are used in AM, metal AM is expected to provide a high impact to the industries by producing

Superconducting optoelectronic networks V: networks and scaling

May 17, 2018
Author(s)
Jeffrey M. Shainline, Jeffrey T. Chiles, Sonia M. Buckley, Adam N. McCaughan, Richard P. Mirin, Sae Woo Nam
Networks of superconducting optoelectronic neurons are investigated for their near-term technological potential and long-term physical limitations. Networks with short average path length, high clustering coefficient, and power-law degree distribution are

Characterization of Five-Hole Probes used for Flow Measurement in Stack Emission Testing

May 16, 2018
Author(s)
Iosif Isaakovich Shinder, Aaron Johnson, Michael R. Moldover, James Filla, Vladimir Khromchenko
We report progress towards the goal of reducing the errors in industrial smokestack flow measurements to 1 % by replacing S-probes with calibrated 3-D probes (i.e., probes that measure 3 components of velocity). NIST calibrated a commercially-manufactured
Displaying 11926 - 11950 of 73927
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