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Search Publications

NIST Authors in Bold

Displaying 1601 - 1625 of 73697

Empirical Characterization of Doppler in Industrial Wireless Channels

April 16, 2024
Author(s)
Dreyelian Morejon, Jon Montalban, Eneko Iradier, Mohamed Hany, Rick Candell, Pablo Angueira
This paper analyzes the temporal variation of the radio propagation channel in industrial environments. The results have been obtained by processing empirical data from the National Institute of Standards and Technology (NIST) in a field measurement

Self-Assembly of Hierarchical High-h Fluorinated Block Copolymers with an Orthogonal Smectic-within-Lamellae 3 nm Sub-Lattice and Vertical Surface Orientation

April 16, 2024
Author(s)
Bijal Patel, Hongbo Feng, Whitney Loo, Chad R. Snyder, Christopher Eom, Julia Murphy, Daniel Sunday, Paul Nealey, Dean DeLongchamp
Hierarchical structure-within-structure assemblies offer a route toward increasingly complex and multifunctional materials while pushing the limits of block copolymer self-assembly. We present a detailed study of the self-assembly of a series of

Tunable zero-field magnetoresistance responses in Si transistors: Origins and applications

April 16, 2024
Author(s)
Stephen Moxim, Nicholas Harmon, Kenneth Myers, James P Ashton, Elias Frantz, Michael Flatte, Patrick Lenahan, Jason Ryan
The near-zero-field magnetoresistance (NZFMR) response has proven to be a useful tool for studying atomic-scale, paramagnetic defects that are relevant to the reliability of semiconductor devices. The measurement is simple to make and, in some cases

Enhanced localized corrosion resistance of Ni-based alloy 625 processed by directed energy deposition additive manufacturing

April 15, 2024
Author(s)
Karthikeyan Hariharan, Andrew Iams, James Zuback, Todd Palmer, Narasi Sridhar, Rashed Alazemi, Gerald Frankel, Eric Schindelholz
We report a significant improvement in localized corrosion resistance of Ni-based alloy 625 processed by directed energy deposition (DED) in an aggressive aqueous chloride environment. Disparities observed in the polarization behavior between DED and

Evaluating Models That Predict Epoxy Conversion Using Rheological Properties

April 15, 2024
Author(s)
Stian Romberg, Paul Roberts, Chad R. Snyder, Anthony Kotula
Simultaneous rheology and conversion measurements of neat and composite epoxy resins reveal that conventional models neither accurately nor fully describe the relationship between rheology and conversion. We find that models predicting thermoset conversion

Manufacturing USA 2023 Annual Report

April 15, 2024
Author(s)

Zahraha Brunner

Manufacturing USA® is a network of public-private partnerships united to secure U.S. global leadership in advanced manufacturing through large scale collaboration on technology, supply chain, and workforce development. The network includes the U.S

CCQM-P199: Interlaboratory comparability study of HIV-1 RNA copy number quantification

April 13, 2024
Author(s)
Alison Devonshire, Eloise Busby, Gerwyn Jones, Denise O'Sullivan, Ana Fernandez-Gonzalez, Sachie Shibayama, Shin-ichiro Fujii, Megumi Kato, John Emerson Leguizamon Guerrero, Claudia Patricia Tere Pena, Maria Mercedes Arias Cortes, Roberto Becht Flatschart, Marcelo Neves de Medeiros, Antonio Marcos Saraiva, Young-Kyung Bae, Inchul Yang, Hee-Bong Yoo, Alexandra Bogozalec Kosir, Mojca Milavec, Lianhua Dong, Chunyan Niu, Xia Wang, Phattaraporn Morris, Sasithon Temisak, Megan Cleveland, Peter Vallone, Daniel Burke, Michael Forbes-Smith, Jacob McLaughlin, Samreen Falak, Martin Hussels, Rainer Macdonald, Andreas Kummrow, Burhanettin Yalcinkaya, Sema Akyurek, Muslum Akgoz, Maxim Vonsky, Andrey Runov, Simon Cowen, Stephen Nyangoma, Stephen Ellison, Clare Morris, Neil Almond, Jim Huggett
RNA is measured for a range of applications including clinical virology, disease-related gene expression biomarkers, biotechnology, cell therapy (viral vectors) and vaccines. For applications measuring viruses with RNA genomes, such as clinical viral load

Improved Cryptanalysis of HFERP: Unseen Implications of the Simple Attack

April 13, 2024
Author(s)
Max Cartor, Ryann Cartor, Hiroki Furue, Daniel Smith-Tone
In this paper we introduce a new attack on the multivariate encryption scheme HFERP, a big field scheme including an extra variable set, additional equations of the UOV or Rainbow shape as well as additional random polynomials. Our attack brings several

An Adaptable AI Assistant for Network Management

April 12, 2024
Author(s)

Amar Abane, Abdella Battou, Mheni Merzouki

This paper presents a network management AI assistant built with Large Language Models. It adapts at runtime to the network state and specific platform, leveraging techniques like prompt engineering, document retrieval, and Knowledge Graph integration. The

Comparison of Flow Measurement Devices for Large Fire Experiments

April 12, 2024
Author(s)
Giovanni Di Cristina Torres, Rodney Bryant
Bi-directional probes are utilized throughout fire research and testing to measure fire induced flows due to their ability to measure flow which changes direction, and to withstand hostile environments. However, they are not available commercially and

Collision-resolved pressure sensing

April 11, 2024
Author(s)
Daniel Carney, Daniel Barker, Thomas W. LeBrun, David Moore, Jacob Taylor
Heat and pressure are ultimately transmitted via quantized degrees of freedom, like gas particles and phonons. While a continuous Brownian description of these noise sources is adequate to model measurements with relatively long integration times

Dielectric Characterization of H2O and CO2 Uptake by Polyethylenimine Films

April 10, 2024
Author(s)
Jan Obrzut, Jennifer Clark, Avery Baumann, Jack F. Douglas
This study investigates the dielectric properties of branched polyethylenimine (PEI) films in relation to their interaction with moisture and CO2. The dielectric measurements were carried out using a non-contact resonant microwave cavity testing method

Investigation of melt pool dynamics and solidification microstructures of laser melted Ti-6Al-4V powder using X-ray synchrotron imaging

April 10, 2024
Author(s)
Nicholas Derimow, Madelyn Madrigal-Camacho, Orion Kafka, Jake Benzing, Edward Garboczi, Samuel J. Clark, Suveen Mathaudhu, Nik Hrabe
Titanium alloy (Ti-6Al-4V) is widely used in additive manufacturing (AM) industry. However, as laser powder-bed fusion (PBF-L) additive manufacturing (AM) advances towards reliable production of titanium parts, a thorough understanding of the process

Fermi-Level Pinning in ErAs Nanoparticles Embedded in III-V Semiconductors

April 9, 2024
Author(s)
Garnett W. Bryant, Ruiqi Hu, Dai Ho, Quang To, Anderson Janotti
Embedding rare-earth pnictide (RE-V) nanoparticles into III-V semiconductors enables unique optical, electrical, and thermal properties, with applications in THz photoconductive switches, tunnel junctions, and thermoelectric devices. Despite the high

Post-Quantum Cryptography, and the Quantum Future of Cybersecurity

April 9, 2024
Author(s)
Yi-Kai Liu, Dustin Moody
We review the current status of efforts to develop and deploy post-quantum cryptography on the Internet. Then we suggest specific ways in which quantum technologies might be used to enhance cybersecurity in the near future and beyond. We focus on two goals

Precision Calcination Mechanism of CaCO 3 to High-Porosity Nanoscale CaO CO 2 Sorbent Revealed by Direct In Situ Observations

April 5, 2024
Author(s)
Jenny Martinez, Jenna Wardini, Xueli Zheng, Lauren Moghimi, Jason Rakowsky, Jonathan Means, Huiming Guo, Ivan Kuzmenko, Jan Ilavsky, Fan Zhang, Pratik Dholabhai, Leora Dresselhaus-Marais, William Bowman
Deploying energy storage and carbon capture at scale is hindered by the substantial endothermic penalty of decomposing CaCO3 to CaO and CO2, and the rapid loss of CO2 absorption capacity by CaO sorbent particles due to sintering at the high requisite
Displaying 1601 - 1625 of 73697
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