U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 22226 - 22250 of 143784

Surprising Loss of Three-Dimensionality in Low-Energy Spin Correlations on Approaching Superconductivity in Fe 1+y Te 1-x Se x

October 6, 2017
Author(s)
Zhijun Xu, J. A. Schneeloch, Jinsheng Wen, B. L. Winn, G. E. Granroth, Yang Zhao, Genda Gu, I. Zaliznyak, J. M. Tranquada, R. J. Birgeneau, Guangyong Xu
We report inelastic neutron scattering measurements of low energy (hwapproximately less than} 10 meV) magnetic excitations in the "11" system Fe 1+yTe 1-xSe x. The spin correlations are two-dimensional (2D) in the superconducting samples at low temperature

Towards Detecting Data Integrity Attacks in Smart Grid

October 6, 2017
Author(s)
Linqiang Ge, Wei Yu, Paul Moulema, Guobin Xu, David W. Griffith, Nada T. Golmie
An effective operation of the smart grid relies on the integration of sensing, computing, and communication. Attempting to disrupt the system, an adversary may launch cyber-attacks against the smart grid by compromising components, including meters

Model-based Dynamic Scheduling for Multicore Implementation of Image Processing Systems

October 5, 2017
Author(s)
Timothy J. Blattner, Walid Keyrouz, Jiahao Wu, Shuvra S. Bhattacharyya
In this paper, we present a new software tool, called HTGS Model-based Engine (HMBE), for the design and implementation of multicore signal processing applications. HMBE provides complementary capabilities to HTGS (Hybrid Task Graph Scheduler), which is a

Certification of SRM 2493:Standard Reference Mortar for Rheological Measurements

October 4, 2017
Author(s)
Alex Olivas, Chiara C. Ferraris, Nicos Martys, Edward Garboczi, Blaza Toman, William L. George
Rheological measurements are often performed using a rotational rheometer. In this type of rheometer, the tested fluid is sheared between two surfaces, one of which acts as the rotating surface [1]. Usually, the rotational velocity is imposed and the

Determination of the True Lateral Grain Size in Organic-Inorganic Halide Perovskite Thin Films

October 4, 2017
Author(s)
Gordon A. MacDonald, Chelsea Heveran, Mengjin Yang, David Moore, Kai Zhu, Virginia L. Ferguson, Jason Killgore, Frank W. DelRio
In this letter, methylammonium lead iodide (MAPbI3) thin films were examined via piezoresponse force microscopy (PFM) and nanoindentation (NI) to determine if long range atomic order existed across the full width of the apparent grains. From the PFM, the

Hydrogels with Reversible Mechanics to Probe Dynamic Cell Microenvironments

October 4, 2017
Author(s)
Adrianne Rosales, Sebastain Vega, Frank W. DelRio, Jason Burdick, Kristi S. Anseth
The relationship between ECM mechanics and cell behavior is dynamic, as cells remodel and respond to changes in their local environment. Most in vitro substrates are static and supraphysiologically stiff; thus, platforms with dynamic and reversible

MRI Birdcage RF Coil Resonance with Uncertainty and Relative Error Convergence Rates

October 4, 2017
Author(s)
Jeffrey T. Fong, Nathanael A. Heckert, James J. Filliben, Pedro V. Marcal, Robert Rainsberger, Karl F. Stupic, Stephen E. Russek
In a magnetic resonance imaging (MRI) system, it is necessary to excite the nuclei of a patient into coherent precession for imaging. This requires a coupling between the nuclei and a source of radio frequency (RF) power using a transmitter. To receive a
Displaying 22226 - 22250 of 143784
Was this page helpful?