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Displaying 10951 - 10975 of 74079

Correspondence: Phantom Phonon Localization in Relaxors

December 5, 2017
Author(s)
Peter M. Gehring, Daniel E Parshall, Leland Weldon Harriger, Christopher Stock, Guangyong Xu, Xiaobing Li, Haosu Luo
Manley et al. (Ref. [1]) report the observation of an unexpected, weak, phonon mode located in energy between that of the transverse acoustic (TA) and soft transverse optic (TO) modes in the relaxor ferroelectric Pb[(Mg0.33Nb0.67)1-xTix]O3 (PMN-xPT) with

Role of Materials Science in the Resilience of the Built Environment

December 5, 2017
Author(s)
Stephanie S. Watson, Chiara C. Ferraris, Jason D. Averill
The resilience of U.S. communities, defined as the "ability to withstand and recover rapidly from disruptive events," is directly dependent upon the ability of the built environment to maintain and support the functions upon which modern society has come

Spatial Distribution of Hydrophobic Drugs in Model Nanogel-core Star Polymers

December 5, 2017
Author(s)
Vivek M. Prabhu, Guangmin Wei, Robert D. Miller, Victoria A. Piunova, William Swope, Amber Carr
Star polymers with a cross-linked nanogel-core are promising carriers of cargo for therapeutic applications due the synthetic control of amphiphilicity of arms and the stability to infinite dilution. Three nanogel-core star polymers were investigated to

Structural Basis for the Inhibitory Effects of Ubistatins in the Ubiquitin-Proteasome Pathway

December 5, 2017
Author(s)
Mark A. Nakasone, Timothy A. Lewis, Olivier Walker, Anita Thakur, Wissam Mansour, Carlos A. Castaneda, Jennifer L. Goeckeler-Fried, Frank Parlati, Tsui-Fen Chou, Ortal Hayat, Daoning Zhang, Christina M. Camara, Steven M. Bonn, Urszula K. Nowicka, Susan T. Krueger, Michael H. Glickman, Jeffrey L. Brodsky, Raymond J. Deshaies, David Fushman
The success of proteasome inhibitors has led to intense efforts to discover points of therapeutic intervention for nearly every component of the ubiquitin-proteasome system. The discovery of ubistatins, small molecules that inhibit proteasomal degradation

An Examination of National Supply-Chain Flow Time

December 4, 2017
Author(s)
Douglas Thomas, Anand M. Kandaswamy
The US and other national governments invest in research and development to spur competitiveness in their domestic manufacturing industries. However, there are limited studies on identifying the research efforts that will have the largest possible return

Efimov States of Strongly Interacting Photons

December 4, 2017
Author(s)
Jacob M. Taylor, Alexey V. Gorshkov, Michael Gullans, D Ruzik, Seth Rittenhouse, J.P. D'Incao, Paul Julienne, S Diehl
We introduce a new system to study Efimov physics based on interacting photons in cold gases of Rydberg atoms. This system has a large anisotropy between the longitudinal mass of the photons, arising from dispersion, and the transverse mass of the photons

SDR-Based Experiments for LTE-LAA Based Coexistence Systems with Improved Design

December 4, 2017
Author(s)
Yao Ma, Ryan T. Jacobs, Daniel G. Kuester, Jason B. Coder, William F. Young
To enhance spectrum efficiency in next generation heterogeneous wireless systems, it is important to improve shared spectrum usage between unlicensed long-term evolution (LTE) systems, such as the license assisted access (LAA), and legacy systems, such as

A Layered and Aggregated Queuing Network Simulator for Detection of Abnormalities

December 3, 2017
Author(s)
Junfei Xie, Chenyan He, Yan Wan, Kevin L. Mills, Christopher E. Dabrowski
Driven by the needs to monitor, detect, and prevent catastrophic failures for complex information systems in real-time, we develop in this paper a discrete-time queuing network simulator. The dynamic model for the simulator abstracts network dynamics by

Three Antenna Ranges Based on Articualted Robotic Arms at the National Institute of Standards and TechnologyDescribing Usability for Over-the-Air and Standard Near-Field Measuremnts

December 3, 2017
Author(s)
David R. Novotny, Josh Gordon, Michael S. Allman, Jeffrey R. Guerrieri, Alexandra Curtin
NIST has developed an antenna range that uses coordinated industrial robotic systems for measuring milli-meter wave (mmWave) antenna patterns and gain. The Configurable Robotic milli-meter Antenna (CROMMA) facility employs a multi-axis articulated serial

Analysis of Wind Pressure Data on Components and Cladding of Low-Rise Buildings

December 1, 2017
Author(s)
Dat Duthinh, Joseph A. Main, Matthew L. Gierson, Brian M. Phillips
This paper presents a methodology for analyzing wind pressure data on cladding and components of low-rise buildings. The aerodynamic force acting on a specified area is obtained by summing up pressure time series measured at that area’s pressure taps times

Assessment of PGAA capability for low-level measurements of H in Ti alloy

December 1, 2017
Author(s)
Danyal J. Turkoglu, Huaiyu H. Chen-Mayer, Rick L. Paul, Rolf L. Zeisler
The accuracy of low-level hydrogen measurements with prompt gamma-ray activation analysis (PGAA) depends on identifying and accounting for all background H signal, including interfering signals. At the cold-neutron (CN)PGAA facility at the NIST Center for
Displaying 10951 - 10975 of 74079