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Displaying 101 - 125 of 143680

Wind-Driven Fire Spread to a Structure from Landscape Timbers

April 16, 2025
Author(s)
Erik Johnsson, Kathryn Butler, Marco Fernandez, Wei Tang, Shonali Nazare, Philip Deardorff, Sebastian Arana, Alexander Maranghides
NIST is studying how combustible landscape features around a home burn to better understand their levels of hazard and potential roles in spreading wildland-urban interface (WUI) fires. A series of field experiments was conducted to examine the effects of

Data Frequency Coverage Impact on AI Performance

April 15, 2025
Author(s)
Erin Lanus, Brian Lee, Jaganmohan Chandrasekaran, Laura Freeman, M S Raunak, Raghu Kacker, David Kuhn
Artificial Intelligence (AI) models use statistical learning over data to solve complex problems for which straightforward rules or algorithms may be difficult or impossible to design; however, a side effect is that models that are complex enough to

Global Burning Properties of Little Bluestem, Excelsior and Douglas Fir

April 15, 2025
Author(s)
Kunhyuk Sung, Eric Mueller, Matthew Bundy, Marco Fernandez, Anthony Hamins
A series of experiments were conducted to better understand the burning characteristics of three types of vegetative fuels: Little Bluestem grass, Douglas fir trees, and Excelsior. The measurements included the transient heat release rate (HRR) determined

XTDB, an XML based format for Calphad databases

April 15, 2025
Author(s)
Bo Sundman, Fabio Miani, Axel van de Walle, Bengt Hallstedt, Ursula Kattner, Florian Tang, Taichi Abe, Reza Naraghi, Erwin Povoden-Karadeniz, Aurelie Jacob, Shuanglin Chen, Richard Otis, Kazuhisa Shobu, Malin Selleby, Alexander Pisch
The Calphad method uses models which depend on assessed parameters to describe the thermodynamic properties of materials. These model parameters are assessed by researchers and students mainly from experimental data on binary and ternary systems which can

Guia Breve sobre la Incertidumbre de Medicion

April 14, 2025
Author(s)
Antonio Possolo, Maria Victoria Gelabert, David Hibbert, Jurgen Stohner, Olha Bodnar, Juris Meija
Esta Guía Breve reintroduce a los lectores en los principales conceptos y herramientas técnicas utilizadas para la evaluación y expresión de la incertidumbre de medición, incluyendo métodos estadísticos clásicos y bayesianos. El enfoque general es el mismo

Efficient Energy Transfer and Photoluminescence Enhancement in 2D MoS2/bulk InSe van der Waals Heterostructures

April 13, 2025
Author(s)
Michael Altvater, Christopher Stevens, Nicholas Pike, Joshua Hendrickson, Rahul Rao, Sergiy Krylyuk, Albert Davydov, Deep Jariwala, Ruth Patcher, Michael Snure, Nicholas Glavin
Heterostructures between 2D and 3D electron systems remain critically important in developing novel and efficient optoelectronic and electronic devices. In this study, a vertical heterojunction between monolayer MoS2 and bulk InSe was developed. This

Requirements for Cryptographic Accordions

April 11, 2025
Author(s)
Yu Long Chen, Michael Davidson, Morris Dworkin, John Kelsey, Yu Sasaki, Meltem Sonmez Turan, Alyssa Thompson, Nicky Mouha, Donghoon Chang
This report introduces the cryptographic accordion as a tweakable, variable-input-length strong pseudorandom permutation (VIL-SPRP) that is constructed from an underlying block cipher. An accordion facilitates the cryptographic processing of messages of

Topology and Kinetic Pathways of Colloidosome Assembly and Disassembly

April 11, 2025
Author(s)
Raymond Adkins, Joanna Robaszewski, Seungwoo Shin, Fridtjof Brauns, Leroy Jia, Ayantika Khanra, Prerna Sharma, Robert Pelcovits, Thomas Powers, Zvonimir Dogic
Liquid shells, such as lipid vesicles, emulsions, and soap bubbles, are ubiquitous throughout biology, engineered matter, and everyday life. Their creation or disintegration is defined by a singularity separating topologically distinct one-boundary

Tuning the Surface Electronic Landscape of Ultrathin (Al,Sn)Ox Electron Extraction Layers in Perovskite Solar Cells

April 10, 2025
Author(s)
Joshua Sraku Adu, Alice Sheppard, Raphael Agbenyeke, George Kwesi "Asare ", Behrang Hamadani, David Fermin, Helen Hejin Park
Power conversion losses at the electron transport layer (ETL) are key limiting factors in high-performance perovskite solar cells (PSC) and silicon-PSC tandem systems. Solution-processed nanoparticle tin dioxide (np-SnO2) films typically serve as ETLs in n

Application of Voltage Controlled Crystal Oscillators to DC Voltage Reference Validation

April 8, 2025
Author(s)
Matthew Spidell, Malcolm White, Alan Jaffe, John Lehman, Gaylon Partain
DC voltage references are typically based on calibrated Zener Diodes which are subject to drift and therefore require periodic recalibration against a Primary Standard. Since it is preferable to maintain constant power to such references, the shipping and

Manipulation of meniscus rise for in situ multiphase nuclear magnetic resonance spectroscopy

April 8, 2025
Author(s)
Veruska Malave, Newell Moser, Edward Garboczi, Mark McLinden, Jason Widegren, Christopher Suiter
Our earlier work demonstrated that nuclear magnetic resonance (NMR) spectroscopy is a viable technique for in situ analysis of vapor–liquid equilibria (VLE) of fluid mixtures and that inserting a capillary into the NMR sample tube allows the simultaneous

Gauging error of pose acquired by vision systems in bin picking applications

April 7, 2025
Author(s)
Marek Franaszek, Prem Rachakonda, Kamel Saidi
Picking a part from an unorganized pile of parts requires an accurate vision system integrated with a robotic arm. A proper metric for gauging pose error is therefore indispensable. Pose error is a combination of an error in the position vector and an

NIST Time and Frequency Bulletin

April 7, 2025
Author(s)
Kelsey Rodriguez
The Time and Frequency Bulletin provides information on performance of time scales and a variety of broadcasts (and related information) to users of the NIST services.

Workshop Summary Report for ConnectCon 2024: "Minding the Gaps in Human-Centered Cybersecurity"

April 7, 2025
Author(s)
Julie Haney, Matthew Canham, Mike Elkins, Lisa Flynn, Matthew Gordin, Victoria Granova, Wenjing Huang, Jody Jacobs, Greg Moody, Ann Rangarajan, Michael Ross, Robert Thomson, Joe Uchill
In August 2024, the National Institute of Standards and Technology (NIST) co-sponsored ConnectCon, an interactive workshop that facilitated meaningful conversations and connections between researchers and practitioners on the topic of human-centered
Displaying 101 - 125 of 143680
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