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Search Publications

NIST Authors in Bold

Displaying 5776 - 5800 of 73697

PHIDL: Python-based layout and geometry creation for nanolithography

September 27, 2021
Author(s)
Adam McCaughan, Alexander N. Tait, Sonia Buckley, Jeff Chiles, Jeff Shainline, Sae Woo Nam, Dylan M. Oh
Computer-aided design (CAD) has become a critical element in the creation of nanopatterned structures and devices. In particular, with the increased adoption of easy-to-learn programming languages like python, there has been a significant rise in the

Pilot Comparison CCQM-P177 - Monoterpenes in Nitrogen at 2.5 nmol mol-1 Final Report

September 27, 2021
Author(s)
Christina Cecelski, George C. Rhoderick, Joseph T. Hodges, Antonio Possolo, Olaf Wilke
The growing awareness of climate change, and continuing concerns regarding tropospheric and stratospheric chemistry, will require future measurements and standards for compounds linked to these issues. To globally monitor and control the emissions of these

Requirement elicitation for adaptive standards development

September 27, 2021
Author(s)
Marion Toussaint, Sylvere Krima, Allison Barnard Feeney, HERVE PANETTO
The recent digitization of manufacturing, also referred to as the fourth industrial revolution (or Industry 4.0), heavily relies on information standards for the exchange and integration of digital data across manufacturers and their partners. Standards

Structural Performance of Nuclear Power Plant Concrete Structures Affected by Alkali-Silica Reaction (ASR). Task 3: Assessing Cyclic Performance of ASR-Affected Concrete Shear Walls

September 27, 2021
Author(s)
Jonathan Weigand, Fahim H. Sadek, Travis Thonstad, Sorin Marcu, Rudy Villegas, Long Phan, Adam L. Pintar
This report describes the results of Task 3 of a five-task comprehensive research program conducted at the National Institute of Standards and Technology (NIST) under the sponsorship of the U.S. Nuclear Regulatory Commission (NRC). The overall study aims

Continuous radio-frequency electric-field detection through adjacent Rydberg resonance tuning

September 24, 2021
Author(s)
MATTHEW SIMONS, Aly Artusio-Glimpse, chris holloway, Eric Imhof, Steven Jefferts, Robert Wyllie, Brian Sawyer, Thad Walker
We demonstrate the use of multiple atomic-level Rydberg-atom schemes for continuous frequency detection of radio-frequency (RF) fields. Resonant detection of RF fields by electromagnetically induced transparency and Autler-Townes (AT) splitting in Rydberg

Improving end-user trust in the quality of commercial probiotic products

September 24, 2021
Author(s)
Scott Jackson, Jean Schoeni, Buffy Stahl
In a rapidly growing global probiotic market, end-users have difficulty distinguishing between high quality and poor quality products. This threatens consumer and healthcare provider trust in probiotic products. To address this problem, we recommend that

Quantum coding with low-depth random circuits

September 24, 2021
Author(s)
Michael Gullans, David A. Huse, Stefan Krastanov, Liang Jiang, Steven T. Flammia
Random quantum circuits have played a central role in establishing the computational advantages of near-term quantum computers over their conventional counterparts. Here, we use ensembles of low-depth random circuits with local connectivity in D ≥ 1

An assessment of US microbiome research

September 23, 2021
Author(s)
Scott Jackson
Genome-enabled technologies have supported a dramatic increase in our ability to study microbial communities in environments and hosts. Taking stock of previously funded microbiome research can help to identify common themes, under-represented areas and

Calibration of Hygrometers with the Hybrid Humidity Generator

September 23, 2021
Author(s)
Christopher W. Meyer, Tobias Herman, W. Wyatt Miller
We describe here the calibration of customer hygrometers using the NIST Hybrid Humidity Generator (HHG). This generator produces humidified air with water amount fractions (water mole fractions) ranging from 1.0×10−7 to 0.57 using calibration gas flows up

Certification of Standard Reference Material(R) 1936 Great Lakes Sediment

September 23, 2021
Author(s)
Jacqueline Bangma, Debra Ellisor, Michael Ellisor, N. Alan Heckert, Jennifer Hoguet, Kevin Huncik, Jennifer Ness, Jessica Reiner
Standard Reference Material (SRM) 1936 Great Lakes Sediment is intended for 1) use in validating calibration and validation materials for sediment analysis methods and 2) value assigning in house produced control materials analyzed using those methods. A

Current Explorations of Nutrition and the Gut Microbiome: A Systematic Review

September 23, 2021
Author(s)
Scott Jackson, Leigh A. Frame, Elise Costas
Background The ability to measure and describe the microbiome has led to a surge in information about the gut microbiome and its role in health and disease. The relationship between nutrition and the gut microbiome is central, as the diet is a source of

Evaluating the Impact of Contactless Fingerprint Imagery Spatial Loss on Matcher Performance

September 23, 2021
Author(s)
Shahram Orandi, John M. Libert, Bruce Bandini, Kenneth Ko, John Grantham, Brian J. Cochran, Craig I. Watson
Observations in previous studies have shown that contactless capture devices may be prone to capturing superfluous data (e.g., fingernail or finger background), distortion and imaging artifacts especially around the periphery of the captured fingerprint

Solid-State Transformation of an Additive Manufactured Inconel 625 Alloy at 700 degC

September 23, 2021
Author(s)
Fan Zhang, Jan Ilavsky, Greta Lindwall, Mark R. Stoudt, Lyle E. Levine, Andrew J. Allen
Inconel 625, a nickel-based superalloy, has drawn much attention in the emerging field of additive manufacturing (AM) because of its excellent weldability and resistance to hot cracking. The extreme processing condition of AM often introduces enormous

Surface topography process signatures in nickel superalloy 625 additive manufacturing

September 23, 2021
Author(s)
Jason Fox, Angela Allen, Brigid Mullany, Ed Morse, Romaine Isaacs, Marc Lata, Aarush Sood, Christopher Evans
Prior analyses of surface measurements performed – by several groups – on laser powder bed fused metals have tended to use ISO standard short wavelength filters and focus on weld tracks, "chevrons" (melt pool wake), and particles. This work, utilizing two

The structure of medium-scale propane pool fires

September 23, 2021
Author(s)
Ryan Falkenstein-Smith, Kunhyuk Sung, Anthony Hamins
A series of time-averaged temperature, velocity, and gas species measurements are made along the centerline of propane fires established on a 37 cm diameter gas burner situated in a quiescent environment. Fires with heat release rates of 20 kW and 34 kW
Displaying 5776 - 5800 of 73697
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