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 4201 - 4225 of 73461

Are 2D Interfaces Really Flat?

March 15, 2022
Author(s)
Zhihui Cheng, Huairuo Zhang, Son Le, Hattan Abuzaid, Guoqing Li, Yifei Yu, Albert Davydov, Linyou Cao, Aaron Franklin, Curt A. Richter
Two-dimensional (2D) materials are amenable to external mechanical deformation and thus forming bubbles and wrinkles. However, little is known about the dynamics of 2D interfaces, especially their flatness under different conditions. Here we use cross

Assessing Enhanced Security Requirements for Controlled Unclassified Information

March 15, 2022
Author(s)
Ronald S. Ross, Victoria Yan Pillitteri, Kelley L. Dempsey
The protection of Controlled Unclassified Information (CUI) in nonfederal systems and organizations is important to federal agencies and can directly impact the ability of the Federal Government to successfully carry out its assigned missions and business

Quantifying Receiver Nonlinearities in VNA Measurements for the WR-15 Waveguide Band

March 15, 2022
Author(s)
Angela Stelson, Aaron Hagerstrom, Jeffrey Jargon, Chris Long
Scattering (S-) parameters are fundamental to numerous microwave quantities including antenna factors, microwave power, and phase. The uncertainty in S-parameter measurements is influenced by the test setup, including instrument noise, drift, position of

The Path to Consensus on Artificial Intelligence Assurance

March 15, 2022
Author(s)
Laura Freeman, Feras Batarseh, D. Richard Kuhn, M S Raunak, Raghu N. Kacker
Widescale adoption of intelligent algorithms requires that Artificial Intelligence (AI) engineers provide assurances that an algorithm will perform as intended. Providing such guarantees involves quantifying capabilities and the associated risks across

Topological Phase Transition and Charge-Spin Coupling in the Kagome Metal YMn 6 Sn 6

March 15, 2022
Author(s)
Peter E. Siegfried, Hari Bhandari, David C. Jones, Madhav P. Ghimire, Rebecca Dally, Lekh Poudel, Markus Bleuel, Jeffrey Lynn, Igor I. Mazin, Nirmal J. Ghimire
The Fermi surface (FS) is essential for understanding the properties of metals. It can change under both conventional symmetry-breaking phase transitions and Lifshitz transitions (LTs), where the FS, but not the crystal symmetry, changes abruptly. Magnetic

Towards a Standard for Identifying and Managing Bias in Artificial Intelligence

March 15, 2022
Author(s)
Reva Schwartz, Apostol Vassilev, Kristen K. Greene, Lori Perine, Andrew Burt, Patrick Hall
As individuals and communities interact in and with an environment that is increasingly virtual they are often vulnerable to the commodification of their digital exhaust. Concepts and behavior that are ambiguous in nature are captured in this environment

Business context-based approach for Digital Twin services integration

March 14, 2022
Author(s)
Elena Jelisic, Marija Jankovic, Nenad Ivezic, Boonserm Kulvatunyou, Dionysios Kehagias, Zoran Marjanovic
Digital Twins (DTs) are among the most popular and quickly evolving technologies, particularly within Industry 4.0. The rapid expansion of a new generation of information technologies, such as the Internet of Things (IoT), artificial intelligence (AI), and

Electrochemically Assaying Dopamine with p-Doped Silicon Nanowires

March 14, 2022
Author(s)
Nawaraj Karki, Albert Davydov, Sergiy Krylyuk, Charles Chusuei
Neuroblastoma, a pediatric cancer, is characterized by high urinary excretion of dopamine (DA). Silicon nanowires (SiNWs), which are nontoxic and known to resist surface fouling in biological samples, were investigated for practical use as working

Lambda-enhanced gray molasses in a tetrahedral laser beam geometry

March 14, 2022
Author(s)
Daniel Barker, Eric Norrgard, Nikolai Klimov, James A. Fedchak, Julia Scherschligt, Stephen Eckel
We report observation of sub-Doppler cooling of lithium using an irregular-tetrahedral laser beam arrangement, which is produced by a nanofabricated diffraction grating. We are able to capture 11(2) % of the lithium atoms from a grating magneto-optical

New Ways to Get to High Ground

March 14, 2022
Author(s)
Jennifer Helgeson, Jia Li
Benefit-cost analysis for sustainability and resilience planning needs new tools to proactively meet community needs and ensure that projects are successful.

Design and Testing of Wireless Motion Gauges for Two Collaborative Robot Arms

March 11, 2022
Author(s)
Yong Sik Kim, Nicholas G. Dagalakis, Jeremy Marvel, Geraldine Cheok
Most existing robot performance evaluation methods focus on single robotic arms performing independent motion tasks. In this paper, a motion gauge is proposed to evaluate the symmetrical coordinated-motion performance between two robotic arms. For this

Pore and Grain Chemistry during sintering of garnet-type Li6.4La3Zr1.4Ta0.6O12 solid-state electrolytes

March 11, 2022
Author(s)
Joshua Hammons, J. Ali Espitia, Erika Ramos, Rongpei Shi, Frederick Meisenkothen, Marissa Wood, Maira Ceron-Hernandez, Jianchao Ye
Garnet-type solid-state electrolytes have significant advantages over liquid organic electrolytes but require energy-intensive sintering to achieve high density and ionic conductivity. The aim of this study is to understand the chemical and microstructural

A Template for the Validation of DART-MS for Qualitative Seized Drugs Analysis

March 10, 2022
Author(s)
Edward Sisco, Amber Burns, Elizabeth Schneider, Laurel Bobka, Ikenna Ikpeama
Direct analysis in real time mass spectrometry (DART-MS) is an increasingly employed tool for a wide range of forensic applications including seized drug analysis. A significant body of research surrounds DART-MS for the analysis of seized drugs and how it

Calorimetry in Computed Tomography Beams

March 10, 2022
Author(s)
Heather H. Chen-Mayer, Ronald Tosh, Fred B. Bateman, Paul Bergstrom, Brian E. Zimmerman
A portable calorimeter for direct realization of absorbed dose in medical computed tomography (CT) procedures was constructed and tested in a positron emission tomography (PET) CT scanner. The calorimeter consists of two small thermistors embedded in a

Characterization of backdrafts generated from methane fires

March 10, 2022
Author(s)
Ryan Falkenstein-Smith, Christopher U. Brown, Thomas Cleary
An analysis of oxygen concentration measurements is conducted to investigate compartment ventilation before a potential backdraft phenomenon. Experiments are performed in a 2/5th scale compartment of varying configurations such as fuel flow time, spark
Displaying 4201 - 4225 of 73461
Was this page helpful?