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Search Publications

NIST Authors in Bold

Displaying 6326 - 6350 of 73697

Late Stage Domain Coarsening Dynamics of Lamellar Block Copolymers

May 26, 2021
Author(s)
Jack F. Douglas, Maninderjeet Singh, Wenjie Wu, Vinay Nuka, Joseph Strzalka, Alamgir Karim
Block copolymer (BCP) phase separation is an intriguing phenomenon whose dynamics can be expected to differ significantly from that of the polymer blends due to constraint of chain connectivity that limits the ultimate scale of phase separation and the

Securing Small-Business and Home Internet of Things (IoT) Devices: Mitigating Network-Based Attacks Using Manufacturer Usage Description (MUD)

May 26, 2021
Author(s)
Murugiah Souppaya, Douglas Montgomery, Tim Polk, Mudumbai Ranganathan, Donna Dodson, William Barker, Steve Johnson, Ashwini Kadam, Craig Pratt, Darshak Thakore, Mark Walker, Eliot Lear, Brian Weis, Dean Coclin, Avesta Hojjati, Clint Wilson, Tim Jones, Adnan Baykal, Drew Cohen, Kevin Yeich, Yemi Fashima, Parisa Grayeli, Joshua Harrington, Joshua Klosterman, Blaine Mulugeta, Susan Symington, Jaideep Singh
The goal of the Internet Engineering Task Force's Manufacturer Usage Description (MUD) specification is for Internet of Things (IoT) devices to behave as intended by the manufacturers of the devices. MUD provides a standard way for manufacturers to

Structure Separation Experiments Phase 1 Preliminary Test Plan

May 26, 2021
Author(s)
Alexander Maranghides, Shonali Nazare, Eric Link, Kuldeep Prasad, Matthew Hoehler, Matthew Bundy, Steven Hawks, Frank Bigelow, William (Ruddy) Mell, Anthony Bova, Derek McNamara, Tom Milac, Daniel Gorham, Faraz Hedayati, Bob Raymer, Frank Frievalt, William Walton
The primary objective of this project is to assess structure-to-structure fire spread for structures located in the Wildland Urban Interface (WUI). Full-scale fire experiments will be conducted in which various types of structures (sources of fire) will be

Tantala Kerr nonlinear integrated photonics

May 26, 2021
Author(s)
Hojoong Jung, Su P. Yu, David Carlson, Tara E. Drake, Travis Briles, Scott Papp
Integrated photonics plays a central role in modern science and technology, enabling experiments from nonlinear science to quantum information, ultraprecise measurements and sensing, and advanced applications like data communication and signal processing

Three-dimensional particle size, shape, and internal porosity characterization: Application to five similar titanium alloy (Ti-6Al-4V) powders and comparison to two-dimensional measurements

May 26, 2021
Author(s)
Edward Garboczi, Rainer Hebert, Yu Sun, Mark Aindow
In an earlier paper, titanium alloy (Ti-6Al-4V) powders from six different vendors were characterized with a number of methods in an attempt to distinguish these powders that were all nominally meeting additive manufacturing standards. One of the methods

Towards integrated photonic interposers for processing octave-spanning microresonator frequency combs

May 26, 2021
Author(s)
Ashutosh Rao, Gregory Moille, Xiyuan Lu, Daron Westly, Davide Sacchetto, Michael Geiselmann, Michael Zervas, Scott Papp, John E. Bowers, Kartik Srinivasan
Microcombs - optical frequency combs generated in microresonators - have advanced tremendously in the last decade, and are advantageous for applications in frequency metrology, navigation, spectroscopy, telecommunications, and microwave photonics

Multifunctional metasurfaces enabled by simultaneous and independent control of phase and amplitude for orthogonal polarization states

May 25, 2021
Author(s)
Mingze Liu, Wenqi Zhu, Pengcheng Huo, Lei Feng, Maowen Song, Cheng Zhang, Lu Chen, Henri Lezec, Yanqing Lu, Amit Agrawal, Ting Xu
Monochromatic light can be characterized by its three fundamental properties: amplitude, phase and polarization. In this work, we propose a versatile, transmission-mode all-dielectric metasurface platform that can independently manipulate the phase and

Deep reinforcement learning assisted energy harvesting wireless networks

May 24, 2021
Author(s)
Junliang Ye, Hamid Gharavi
Heterogeneous ultra-dense networking (HUDN) with energy harvesting technology is a promising approach to deal with the ever-growing traffic that can severely impact the power consumption of small-cell networks. Unfortunately, the amount of harvested energy

Evaluating Multimedia and Language Tasks

May 24, 2021
Author(s)
Ian Soboroff, George Awad, Asad Butt, Keith Curtis
Evaluating information access tasks, including textual and multimedia search, question answering, and understanding has been the core mission of NIST's Retrieval Group since 1989. The TRECVID Evaluations of Multimedia Access began in 2001 with a goal of

Observation of chiral photocurrent transport in the quantum Hall regime in graphene

May 24, 2021
Author(s)
Glenn S. Solomon, Olivier Gazzano, Bin Cao, Jiuning Hu, David B. Newell, Tobias Huber, Michael Gullans, Mohammad Hafezi, Tobias Grass
Optical excitation provides a powerful tool to investigate non-equilibrium physics in quantum Hall systems. Moreover, the length scale associated with photo-excited charge carries lies between that of local probes and global transport measurements. Here

Temporal Exemplar Channels in High-Multipath Environments

May 24, 2021
Author(s)
Mohamed Hany, Peter Vouras, Rob Jones, Rick Candell, Kate Remley
Industrial wireless plays a crucial role in cyber-physical system (CPS) advances for the future vision of smart manufacturing. However, industrial wireless environments are different from each other and are different from home and office environments

Workshop Report: Challenges for Digital Proximity Detection in Pandemics: Privacy, Accuracy, and Impact

May 24, 2021
Author(s)
Michelle Stephens, Gregory (Greg) C. Cala, Kristen K. Greene, Katy Keenan, Angela Robinson, Donald Ufford, Zachary Valdez, Lu Shi
NIST held a three-day workshop, "Challenges for Digital Proximity Detection in Pandemics: Privacy, Accuracy, and Impact" Jan. 26th – 28th, 2021. Members of industry, academia, non-profits, state, and federal government were brought together to discuss

Dynamic light scattering distributions by any means

May 21, 2021
Author(s)
Natalia Farkas, John A. Kramar
Dynamic light scattering (DLS) is an essential technique for nanoparticle size analysis and has been employed extensively for decades, but despite its long history and popularity, the choice of weighting and mean of the size distribution often appears to

TREC 2020 News Track Overview

May 21, 2021
Author(s)
Ian Soboroff, Shudong Huang, Donna Harman
The News track focuses on information retrieval in the service of help- ing people read the news. In 2018, in cooperation with the Washington Post1, we released a new collection of nearly 600,000 news articles, and crafted two tasks related to how news is

Buried Structure in Block Copolymer Films Revealed by Soft X-ray Reflectivity

May 20, 2021
Author(s)
Daniel Sunday, Jacob L. Thelen, Regis Kline, Chun Zhou, Jiaxing Ren, Paul Nealey
Interactions between polymers and surfaces can be used to influence properties including mechanical performance in nanocomposites, the glass transition temperature, and the orientation of thin film block copolymers (BCPs). In this work we investigate how

Combining secondary ion mass spectrometry image depth profiling and single particle inductively coupled plasma mass spectrometry to investigate the uptake and biodistribution of gold nanoparticles in Caenorhabditis elegans

May 20, 2021
Author(s)
Monique Johnson, Joe Bennett, Antonio Montoro Bustos, Shannon Hanna, Andrei Kolmakov, Nicholas Sharp, Elijah Petersen, Christopher Sims, Bryant Nelson, Patricia Lapasset
Analytical techniques capable of determining the spatial distribution and quantity (mass and/or particle number) of engineered nanomaterials in organisms are essential for characterizing nano-bio interactions and for nanomaterial risk assessments. Here, we

Gauss Hypergeometric Representations of the Ferrers Function of the Second Kind

May 20, 2021
Author(s)
Howard Cohl, Hans Volkmer, Justin Park
We derive all eighteen Gauss hypergeometric representations for the Ferrers function of the second kind, each with a different argument. They are obtained from the eighteen hypergeometric representations of the associated Legendre function of the second

Multiplatform Standards and Guidelines Publishing at NIST

May 20, 2021
Author(s)
Kathryn Miller
The National Institute of Standards and Technology is a nonregulatory agency of the U.S. Department of Commerce. One of the agency's responsibilities is to develop industry standards and guidelines, which are published as NIST Technical Series publications
Displaying 6326 - 6350 of 73697
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