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Displaying 8101 - 8125 of 74291

Complexity and Entropy Representation for Machine Component Diagnostics

July 9, 2019
Author(s)
Srinivasan Radhakrishnan, Yung-Tsun Lee, Sudarsan Rachuri, Sagar Kamarthi
The Complexity-entropy causality plane (CECP) is a parsimonious representation space for time series. It has two dimensions: normalized permutation entropy (Hs) and Jensen-Shannon complexity (Cjs) of a time series. The representation can be used for both

Cybersecurity Framework Smart Grid Profile

July 9, 2019
Author(s)
Jeffrey A. Marron, Avi M. Gopstein, Nadya Bartol, Larry Feldman
The Smart Grid Profile is an initial attempt to apply risk management strategies from the Framework for Improving Critical Infrastructure Cybersecurity (Cybersecurity Framework) to the smart grid. The Profile provides cybersecurity risk management guidance

Information Exposure (IEX): A New Class in the Bugs Framework (BF)

July 9, 2019
Author(s)
Irena Bojanova, Yaacov Yesha, Paul E. Black, Yan Wu
Exposure of sensitive information can be harmful on its own and in addition could enable further attacks. A rigorous and unambiguous definition of information exposure faults can help researchers and practitioners identify them, thus avoiding security

The Manufacturing Cost Guide: A Primer Beta Version 0.1

July 9, 2019
Author(s)
Douglas Thomas
This primer provides an overview in using the Manufacturing Cost Guide. It walks through the software tool and provides documentation on how the estimates are calculated in the tool. This tool estimates the costs in US manufacturing, which can be used to

Building Open Access to Research (OAR) data infrastructure at NIST

July 8, 2019
Author(s)
Gretchen R. Greene
As a National Metrology Institute (NMI), the National Institute of Science and Technology (NIST) scientists, engineers and technology experts conduct research across a full spectrum of physical science domains. This is performed as a public service within

Direct-write Lithiation of Silicon Using a Focused Ion Beam of Li+

July 8, 2019
Author(s)
William R. McGehee, Evgheni Strelcov, Vladimir P. Oleshko, Christopher L. Soles, Nikolai B. Zhitenev, Jabez J. McClelland
Electrochemical processes that govern the performance of lithium ion batteries involve numerous parallel reactions and interfacial phenomena that complicate the microscopic understanding of these systems. As a new way to study the behavior of ion transport

Electron Reflectometry for Measuring Nanostructures on Opaque Substrate

July 8, 2019
Author(s)
Lawrence H. Friedman, Wen-Li Wu
Here, we present a method for measuring dimensions of nanostructures using specular reflection of electrons from an opaque surface. Development of this method has been motivated by measurement needs of the semiconductor industry, but it can also be more

NIST Time and Frequency Bulletin

July 8, 2019
Author(s)
Kathryn R. Stephenson
The Time and Frequency Bulletin provides information on performance of time scales and a variety of broadcasts (and related information) to users of the NIST services.

Organizing End-Site-Specific SWCNTs in Specific Loci Using DNA

July 8, 2019
Author(s)
Ming Zheng
Single-wall carbon nanotubes (SWCNTs) are known to embody many desirable features for nanoelectronic and photonic applications, including excellent electronic and optical properties and mechanical robustness. To utilize these species in a bottom-up

Photonic-crystal-reflector nano-resonators for Kerr-frequency combs

July 8, 2019
Author(s)
Su P. Yu, Hojoong Jung, Travis Briles, Kartik Srinivasan, Scott Papp
We demonstrate Kerr-frequency-comb generation with photonic-crystal-reflector (PCR) resonators, which is nanofabricated in a Fabry-Perot geometry. The group-velocity-dispersion (GVD) engineered photonic-crystal reflectors counteract the strong normal GVD

Machine Learning in a Quality Managed RF Measurement Workflow

July 6, 2019
Author(s)
Aric Sanders, John Bass, Arpita Bhutani, Mary A. Ho, Jim Booth
Advances in artificial intelligence, or more specifically machine learning, have made it possible for computers to recognize patterns as well or better than humans. The process of quality management in radio-frequency measurements is an arduous one that

Understanding Gas Storage in Cuboctahedral Porous Coordination Cages

July 4, 2019
Author(s)
Gregory R. Lorzing, Eric J. Gosselin, Benjamin Trump, Arthur H. P. York, Arni Sturluson, Casey A. Rowland, Glenn P. A. Yap, Craig Brown, Cory M. Simon, Eric D. Bloch
Porous molecular solids are promising molecular solids are promising materials for gas storage applications. However, given the relative dearth of studies concerning these materials in this regard, additional adsorption and structural studies are vital for

Contemporary x-ray wavelength metrology and traceability

July 3, 2019
Author(s)
Lawrence T. Hudson, James P. Cline, Albert Henins, Marcus H. Mendenhall, Csilla I. Szabo-Foster
We report recent advances in absolute x-ray wavelength metrology in the context of producing modern standard reference data. Primary standard x-ray wavelengths are typically measured with two-crystal (or more) diffraction spectrometers operated in

Glossary of Key Information Security Terms

July 3, 2019
Author(s)
Celia Paulsen, Robert D. Byers
This publication describes an online glossary of terms used in National Institute of Standards and Technology (NIST) and Committee on National Security Systems (CNSS) publications. This glossary utilizes a database of terms extracted from NIST Federal

Nuclear-Spin Dependent Parity Violation in Optically Trapped Polyatomic Molecules

July 3, 2019
Author(s)
Eric B. Norrgard, Daniel S. Barker, Stephen P. Eckel, James A. Fedchak, Nikolai N. Klimov, Julia K. Scherschligt
We investigate using optically trapped linear polyatomic molecules as probes of nuclear spin- dependent parity violation. The presence of closely spaced, opposite-parity $\ell$-doublets is a general feature of such molecules, allowing parity-violation
Displaying 8101 - 8125 of 74291