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NIST Authors in Bold

Displaying 12501 - 12525 of 73929

Guidance for Improving LTE-based Mobile Communications Security

January 30, 2018
Author(s)
Jeffrey Cichonski, Joshua M. Franklin, Michael Bartock, Larry Feldman, Greg Witte
This bulletin summarizes the information found in NIST SP 800-187: Guide to LTE Securtiy, which serves as a guide to the fundamentals of how LTE networks operate and explores the LTE security architecture.

Implementation of SDR TWSTFT in UTC Computation

January 30, 2018
Author(s)
Zhiheng Jiang, Felicitas Arias, Victor S. Zhang, Yi-Jiun Huang, Joseph Ackhar, Dirk Piester, Shinn-Yan Lin, Wenjun Wu, Andrey Naumov, Sung-hoon Yang, Jerzy Nawrocki, Ilaria Sesia, Christian Schlunegger, Kun Liang
Two-Way Satellite Time and Frequency Transfer (TWSTFT or TW for short) is a primary technique for the realization of Coordinated Universal Time (UTC), which is computed by the International Bureau of Weights and Measures (BIPM). TWSTFT is carried out

Low-temperature thermal reduction of graphene oxide: In situ correlative structural, thermal desorption and electrical transport measurements

January 30, 2018
Author(s)
Alexey Lipatov, Maxime Guinel, Dmitry S. Muratov, Vladislav O. Vanyushin, Peter Wilson, Andrei Kolmakov, Alexander Sinitskii
Elucidation of the structural transformations in graphene oxide (GO) upon reduction remains an active and important area of research. We report the results of in situ heating experiments, during which electrical, mass spectrometry, X-ray photoelectron

Metrological and legal traceability of time signals

January 30, 2018
Author(s)
Demetrios Matsakis, Judah Levine, Michael A. Lombardi
Metrological traceability requires an unbroken chain of calibrations that relate to a reference, with each calibration having a documented measurement uncertainty. In the field of time and frequency metrology, the desired reference is usually Coordinated

Dimensional Analysis on Forest Fuel Bed Fire Spread

January 29, 2018
Author(s)
Jiann C. Yang
A dimensional analysis was performed to correlate the fuel bed fire spread data previously reported in the literature. Under wind condition, six pertinent dimensionless groups were identified, namely dimensionless fire spread rate, dimensionless fuel

Effects of Distal Residues Mutations on the Structure, Dynamics and Catalysis of Human Monoacylglycerol Lipase

January 29, 2018
Author(s)
Sergiy Tyukhtenko, Girija Rajarshi, Ioannis Karageorgos, Nikolai Zvonok, Elyssia S. Gallagher, Hongwei Huang, Kiran Vemuri, Jeffrey W. Hudgens, Alexandros Makriyannis
An understanding of how conformational dynamics modulates function and catalysis of human monoacylglycerol lipase (hMGL), an important pharmaceutical target, can facilitate the development of novel modulatory ligands. Here, we report the discovery and

Improving packet synchronization in an NTP server

January 29, 2018
Author(s)
Andrew N. Novick, Michael A. Lombardi, Kevin Franzen, John Clark
A computer or dedicated client can use the Network Time Protocol (NTP) to synchronize an internal clock to a server that is synchronized by a 1 pulse-per-second (pps) signal from a national timing laboratory. Measuring an NTP server on a local area network

Nuclear Magnetic Resonance Study of Anion and Cation Reorientational Dynamics in (NH 4 ) 2 B 12 H 12

January 29, 2018
Author(s)
Alexander V. Skripov, Roman V. Skoryunov, Alexei V. Soloninin, Olga A. Babanova, Vitalie Stavila, Terrence J. Udovic
Diammonium dodecahydro-closedidecabirate (NH 4) 2B 12H 12 is the ionic compound combining NH 4 + cations and [B 12H 12] 2- anions both of which can exhibit high reorientational mobility. To study the dynamical properties of this unusual material, we have

p-type doping efficiency in CdTe: Influence of second phase formation

January 29, 2018
Author(s)
Jedidiah J. McCoy, Santosh K. Swain, David R. Diercks, Brian Gorman, Kelvin G. Lynn, John R. Sieber
Cadmium Telluride (CdTe) high purity, bulk crystals doped with phosphorus have been grown via vertical Bridgman melt growth technique to understand and improve dopant solubility and activation. Large net carrier densities have been reproducibly obtained

STM patterned nanowire measurements using photolithographically defined implants in Si(100)

January 29, 2018
Author(s)
Aruna N. Ramanayaka, Hyun Soo Kim, Ke Tang, Xiqiao Wang, Richard M. Silver, Michael D. Stewart, Joshua M. Pomeroy
Using photolithographically defined implant wires for electrical connections, we demonstrate measurement of a scanning tunneling microscope (STM) patterned nanoscale electronic device on Si(100), eliminating the onerous alignment procedures and electron

Ultralow power artificial synapses using nanotextured magnetic Josephson junctions

January 28, 2018
Author(s)
Michael L. Schneider, Christine A. Donnelly, Stephen E. Russek, Burm Baek, Matthew R. Pufall, Peter F. Hopkins, Paul D. Dresselhaus, Samuel P. Benz, William H. Rippard
Neuromorphic computing is a promising avenue to dramatically improve the efficiency of certain computational tasks, such as perception and decision making. Neuromorphic systems are currently being developed for critical applications ranging from self

Large magneto-optical Kerr effect and real-time imaging of magnetic domain in an antiferromagnet

January 26, 2018
Author(s)
Daniel B. Gopman, Robert D. Shull, Yury Kabanov, Huiyan Man, L. Wu, O.M.J. van 't Erve, D. Rees, Yufan Li, S. Pantakar, C L. Chien, J Orenstein, Tomoya Higo, Satoru Nakatsuji
When a linearly polarized light beam is incident upon the surface of a magnetic material, the reflected light becomes elliptically polarized and the ellipse major axes undergo a polar rotation within the polarization plane of the incident light: this

Multi-Robot Assembly Strategies and Metrics

January 26, 2018
Author(s)
Jeremy A. Marvel, Roger V. Bostelman, Joseph A. Falco
We present a survey of multi-robot assembly applications and methods, and describe trends and general insights into the multi-robot assembly problem for industrial applications. We focus on fixtureless assembly strategies featuring two or more robotic

Quantifying Atom-scale Dopant Movement and Electrical Activation in Si:P Monolayers

January 26, 2018
Author(s)
Xiqiao Wang, Joseph A. Hagmann, Pradeep N. Namboodiri, Jonathan E. Wyrick, Kai Li, Roy E. Murray, Frederick Meisenkothen, Alline F. Myers, Michael D. Stewart, Richard M. Silver
Doped semiconductor structures with ultra-sharp dopant confinement, minimal lattice defects, and high carrier concentrations are essential attributes in the development of both ultra- scaled conventional semiconductor devices and emerging all-silicon

Security Considerations for Code Signing

January 26, 2018
Author(s)
David Cooper, Andrew Regenscheid, Murugiah Souppaya
A wide range of software products (also known as code)--including firmware, operating systems, mobile applications, and application container images--must be distributed and updated in a secure and automatic way to prevent forgery and tampering. Digitally

Strategies for Improving Robot Registration Performance

January 26, 2018
Author(s)
Karl Van Wyk, Jeremy A. Marvel
The ability to calculate rigid-body transformations between arbitrary coordinate systems (i.e., registration) is an invaluable tool in robotics. This effort builds upon previous work by investigating strategies for improving the registration accuracy

Band offset and electron affinity of MBE-grown SnSe2

January 25, 2018
Author(s)
Qin Zhang, Mingda Li, Edward Lochocki, Suresh Vishwanath, Xinyu Liu, Rusen Yan, Huai-Hsun Lien, Malgorzata Dobrowolska, Jacek Furdyna, Kyle M. Shen, Guangjun Cheng, Angela R. Hight Walker, David J. Gundlach, Huili G. Xing, Nhan V. Nguyen
SnSe2 is currently considered a potential 2D material that can form a near-broken gap heterojunction in a tunnel field-effect transistor (TFET) due to its conceivable large electron affinity, which is experimentally confirmed in this letter. With the

Comparisons of Analytical Approaches for Determining Shell Thicknesses of Core-Shell Nanoparticles by X-ray Photoelectron Spectroscopy

January 25, 2018
Author(s)
Cedric J. Powell, Wolfgang Werner, Henryk Kalbe, Alexander Shard, David G. Castner
We assessed two approaches for determining shell thicknesses of core-shell nanoparticles (NPs) by X-ray photoelectron spectroscopy. These assessments were based on simulations of photoelectron peak intensities for Au-core/C-shell, C-core/Au-shell, Cu-core

Glycerol Hydrogen-Bonding Network Dominates Structure and Collective Dynamics in a Deep Eutectic Solvent

January 25, 2018
Author(s)
Antonio Faraone, Durgesh V. Wagle, Gary A. Baker, E. C. Novak, M. Ohl, D. Reuter, Peter Lunkenheimer, A. Loidl, Eugene Mamontov
The deep eutectic solvent glyceline formed by choline chloride and glycerol in 1:2 molar ratio is much less viscous compared to glycerol, which facilitates its use in many applications where high viscosity is undesirable. Despite the large difference in
Displaying 12501 - 12525 of 73929
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