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Displaying 10201 - 10225 of 73751

2018 National Institute of Standards and Technology Environmental Scan

March 26, 2019
Author(s)
Jason E. Boehm, Heather Evans, Ajitkumar Jillavenkatesa, Maria Nadal, Mark A. Przybocki, Paul Witherell, Rebecca A. Zangmeister
The 2018 National Institute of Standards and Technology Environmental Scan provide an analysis of the external factors that can influence NIST and the fulfillment of its mission as the agency looks to create a strategic plan for the coming years. The

Lithium-loaded Liquid Scintillator Production for the PROSPECT experiment

March 26, 2019
Author(s)
Hans Pieter Mumm, Denis E. Bergeron, Mark Tyra, Svetlana Nour, Jerome LaRosa
This work reports the production and characterization of lithium-loaded liquid scintillators (LiLS) for the Precision Reactor Oscillation and Spectrum Experiment (PROSPECT). Fifty-nine 90 L batches of LiLS (6Li mass fraction 0.082%0.001%) were produced

A TES X-ray Spectrometer for NSENSE

March 25, 2019
Author(s)
Christine G. Pappas, Malcolm S. Durkin, Joseph W. Fowler, Kelsey M. Morgan, Joel N. Ullom, William B. Doriese, Gene C. Hilton, Galen C. O'Neil, Daniel R. Schmidt, Paul Szypryt, Daniel S. Swetz
The Non-destructive Statistical Estimation of Nanoscale Structures and Electronics NSENSE instrument for IARPAs Rapid Analysis of Various Emerging Nanoelectronics RAVEN program is a tabletop X-ray tomography prototype designed for three-dimensional imaging

Miniature fiber optic acoustic pressure sensors with air-backed graphene diaphragms

March 25, 2019
Author(s)
Douglas A. Olson, Haijun H. Liu, Zhijian Zhang, Yongyao Chen, Wen Zhongshan, Yu Miao, Hyungdae Bae, Qian Dong
We present a miniature graphene-based acoustic sensor utilizing a graphene-silver composite diaphragm covered on top of a UV-molded cavity that is directly fabricated on the tip of an optical fiber. The composite diaphragm consists of a 4-monolayer thick

Probing the Participation of Oxygen Redox in the Electrochemical Cycling of Li-Rich Li2IrO3

March 25, 2019
Author(s)
Eric L. Shirley, John T. Vinson, Liang Li, Maria K. Chan, Joong S. Park, Eungje Lee, John W. Freeland, Zhenpeng Yao, Fernando Castro, Timothy T. Fister, Christopher M. Wolverton, Michael Thackeray
To exploit extra capacity beyond the traditionally postulated transition metal redox in Li-ion batteries, it is imperative to understand the exact role of oxygen in the charge compensation, i.e., what triggers the electron occupation change in oxygen and

R-152a/air and R-134a/oxygen constant volume spherical flame burning velocity measurements

March 25, 2019
Author(s)
Robert R. Burrell, Gregory T. Linteris, Donald R. Burgess Jr., Michael J. Hegetschweiler, Jeffrey A. Manion, Valeri I. Babushok
Many presently used refrigerants are non-flammable but are being phased out due to concerns about their strong global warming potential (GWP). Replacements with low GWP exist but tend to be flammable with a maximum burning velocity in air between 1 cm/s

The Kibble balance and the kilogram

March 25, 2019
Author(s)
Stephan Schlamminger, Darine El Haddad
Dr. Bryan Kibble invented the watt balance in 1975 to improve the realization of the unit for electrical current, the ampere. With the discovery of the Quantum Hall e ect in 1980 by Dr. Klaus von Klitzing and in conjunction with the previously predicted

Topological Bands for Ultracold Atoms

March 25, 2019
Author(s)
Ian B. Spielman, Nigel Cooper, Jean Dalibard
There have been significant recent advances in realizing bandstructures with geometrical and topological features in experiments on cold atomic gases. We provide an overview of these developments, beginning with a summary of the key concepts of geometry

Examining the Relationships Between Blubber Steroid Hormone and Persistent Organic Pollutant Measurements in Common Bottlenose Dolphins

March 24, 2019
Author(s)
Thomas M. Galligan, Brian C. Balmer, Lori Schwacke, Jennie L. Bolton, Brian M. Quigley, Patricia Rosel, Gina M. Ylitalo, Ashley Russell
In this study, we use remotely collected blubber samples from common bottlenose dolphins (Tursiops truncatus) inhabiting the waters near a U.S. Environmental Protection Agency Superfund site with high local DDx concentrations, to study the impacts of DDx

Soft MUD: Implementing Manufacturer Usage Descriptions on OpenFlow SDN Switches

March 24, 2019
Author(s)
Mudumbai Ranganathan, Douglas Montgomery, Omar Ilias El Mimouni
Manufacturer Usage Descriptions are generalized network Access Control Lists (ACL) that allow manufacturers to declare intended communication patterns for devices (Things). MUD-enabled Things are restricted to only communicate in the manner intended by the

Comment on "Giant Electromechanical Coupling of Relaxor Ferroelectrics Controlled by Polar Nanoregion Vibrations"

March 22, 2019
Author(s)
Peter M. Gehring, Zhijun NMN Xu, C. Stock, Guangyong NMN Xu, Daniel E Parshall, Leland Weldon Harriger, C. A. Gehring, Xiaobing Li, Haosu Luo
Manley et al. (Science Advances, 16 September 2016, p.e1501814) report a splitting of a transverse acoustic phonon branch below T c in the relaxor ferroelectric Pb[(Mg 1/3Nb 2/3) 1-xTi x]O 3 with x=0.30 using neutron scattering methods. They argue that

Interfaces In Aromatic Polymer-Nanocellulose Composites

March 22, 2019
Author(s)
Douglas M. Fox, Jeremiah Woodcock, Sindhu Seethamraju, Jeffrey W. Gilman, Katrina Wakeman, Tess Ravick
Formation of well dispersed cellulose – polymer composites is a challenge. This is magnified when preparing composites using nanoscale materials, where the bulk properties are dominated by interfacial properties. In this chapter, synthetic and processing

Microwave SQUID multiplexing for the Lynx x-ray microcalorimeter

March 22, 2019
Author(s)
Douglas A. Bennett, John A. Mates, Simon R. Bandler, Daniel T. Becker, Joseph W. Fowler, Johnathon D. Gard, Gene C. Hilton, K D. Irwin, Kelsey M. Morgan, Carl D. Reintsema, Kazuhiro Sakai, Daniel R. Schmidt, Stephen J. Smith, Daniel S. Swetz, Joel N. Ullom, Leila R. Vale, Abigail L. Wessels
The Lynx x-ray microcalorimeter (LXM) is an imaging spectrometer for the Lynx satellite mission, an x-ray telescope being considered by NASA to be a new flagship mission. Lynx will enable unique astrophysical observations into the x-ray universe due to its

Security Requirements for Cryptographic Modules

March 22, 2019
Author(s)
National Institute of Standards and Technology (NIST), Michael J. Cooper, Kim B. Schaffer
The selective application of technological and related procedural safeguards is an important responsibility of every federal organization in providing adequate security in its computer and telecommunication systems. This standard is applicable to all

Recommendation for Pair-Wise Key Establishment Using Integer Factorization Cryptography

March 21, 2019
Author(s)
Elaine B. Barker, Lidong Chen, Allen L. Roginsky, Richard Davis, Scott Simon
This Recommendation specifies key-establishment schemes using integer factorization cryptography (in particular, RSA). Both key-agreement and key transport schemes are specified for pairs of entities, and methods for key confirmation are included to

Transitioning the Use of Cryptographic Algorithms and Key Lengths

March 21, 2019
Author(s)
Elaine B. Barker, Allen L. Roginsky
The National Institute of Standards and Technology (NIST) provides cryptographic key management guidance for defining and implementing appropriate key management procedures, using algorithms that adequately protect sensitive information, and planning ahead
Displaying 10201 - 10225 of 73751
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