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 6201 - 6225 of 74371

SysML Models for Discrete Event Logistics Systems

July 29, 2020
Author(s)
Timothy A. Sprock, Conrad E. Bock
System models and model-based engineering methods have the promise of transforming the way that industrial engineers interact with production and logistics systems. Model-based methods play a role in improving communication between stakeholders

Cesium Substitution Disrupts Concerted Cation Dynamics in Formamidinium Hybrid Perovskites

July 28, 2020
Author(s)
Eve M. Mozur, Michael A. Hope, Julia C. Trowbridge, David M. Halat, Luke L. Daemen, Annalise E. Maughan, Timothy R Prisk, Clare P. Grey, James R. Neilson
While hybrid perovskites show great promise for photovoltaic applications, several of the most technologically relevant hybrid perovskites degrade rapidly when exposed to water, oxygen, or infrared and ultraviolet radiation. Empirical studies have shown

Structural and magnetic properties of sputtered FePd thin films grown on MgO single-crystal substrates with oblique and normal substrate orientation

July 28, 2020
Author(s)
Xinjun Wang, Sergiy Krylyuk, Daniel Josell, Daniel Gopman, Jian-Ping Wang, Delin Zhang
Materials possessing perpendicular magnetic anisotropy derived from the intrinsic crystal structure, such as in L10 Fe-based alloys, have the potential to deliver superior scaling of magnetic memory elements compared to materials whose anisotropy is

The Art in Science of MicroTAS 2019†

July 28, 2020
Author(s)
Gregory A. Cooksey
The 2019 MicroTAS conference (the 23rd International Conference of Miniaturized Systems for Chemistry and Life Sciences) held in Basel, Switzerland, brought great opportunities to viewinspiring microscale compositions. Many of the best images were

Understanding Photovoltaic Energy Losses under Indoor Lighting Conditions

July 28, 2020
Author(s)
Behrang H. Hamadani
The external luminescence quantum yield as a function of the solar cell current density when exposed to low indoor light was estimated based on absolute electroluminescence measurements and a self-consistent use of the electro-optical reciprocity

Deterministic Intra-Vehicle Communications: Timing and Synchronization

July 26, 2020
Author(s)
Hamid Gharavi
As we power through to the future, in-vehicle communications' reliance on speed is becoming a challenging predicament. This is mainly due to the ever-increasing number of electronic control units (ECUs), which will continue to drain network capacity, hence

Measurements and Modeling of Spherical CH2F2-Air Flames

July 27, 2020
Author(s)
Michael J. Hegetschweiler, John L. Pagliaro, Lukas Berger, Raik Hesse, Joachim Beeckmann, Heinz Pitsch, Gregory T. Linteris
The burning velocity of mixtures of the refrigerant R-32 (CH2F2) with air over a range of equivalence ratios are studied via spherically expanding flames SEFs in a large, optically accessible spherical chamber at constant pressure. Shadowgraph images from

Overview of the TREC 2019 Deep Learning Track

July 27, 2020
Author(s)
Ellen M. Voorhees, Nick Craswell, Bhaskar Mitra, Daniel Campos, Emine Yilmaz
The Deep Learning Track is a new track for TREC 2019, with the goal of studying ad hoc ranking in a large data regime. It is the first track with large human-labeled training sets, introducing two sets corresponding to two tasks, each with rigorous TREC

Broadband detection of multiple spin and orbital angular momenta via dielectric metasurface

July 26, 2020
Author(s)
Si Zhang, Pengcheng Huo, Wenqi Zhu, Cheng Zhang, Peng Chen, Mingze Liu, Lu Chen, Henri Lezec, Amit Agrawal, Yanqing Lu, Ting Xu
Light beams carrying spin angular momentum (SAM) and orbital angular momentum (OAM) have created novel opportunities in the areas of optical communications, imaging, micromanipulation and quantum optics. However, complex optical setups are required to

The Status of Thermodynamic Data and Models for CF3I and its Mixtures

July 24, 2020
Author(s)
Ian H. Bell, Mark O. McLinden
There is a renewed interest in the use of the refrigerant CF3I for refrigeration and air conditioning applications, driven by its low global warming potential (equivalent to CO2), and very low (but nonzero) ozone depletion potential. In this paper we will

Crystallographic Polarity Measurements in Two-Terminal GaN Nanowire Devices by Lateral Piezoresponse Force Microscopy

July 23, 2020
Author(s)
Matthew Brubaker, Alexana Roshko, Samuel Berweger, Paul T. Blanchard, Todd E. Harvey, Norman A. Sanford, Kris A. Bertness
Lateral piezoresponse force microscopy (L-PFM) is demonstrated as a reliable method for determining the crystallographic polarity of individual, dispersed GaN nanowires that were functional components in electrical test structures. In contrast to PFM

Evacuation Decision-Making in the 2016 Chimney Tops 2 Fire: Results of a Household Survey

July 23, 2020
Author(s)
Emily H. Walpole, Erica D. Kuligowski, Lauren B. Cain, Alicea N. Fitzpatrick, Christin Salley
To gain insight into the emergency communication and evacuation decision-making surrounding the 2016 Chimney Tops 2 fire, NIST conducted (via a small business survey research contractor) an online survey targeting homeowners in the Gatlinburg, TN area from
Displaying 6201 - 6225 of 74371