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Search Publications

NIST Authors in Bold

Displaying 5276 - 5300 of 7113

Anharmonic Phonons and the Isotope Effect in Superconductivity

January 1, 1991
Author(s)
V Crespi, Marvin Cohen, David R. Penn
Anharmonic interionic potentials are examined in an Einstein model to study the unusual isotope-effect exponents for the high-T(c) oxides. The mass dependences of the electron-phonon coupling constant λ and the average phonon frequency square-root <ω2> are

Surface, Interface and Thin-Film Magnetism

January 1, 1990
Author(s)
L Falicov, Daniel T. Pierce, S Bader, R Gronsky, K Hathaway, H Hopster, D Lambeth, S Parkin, G Prinz, M Salamon, Ivan K. Schuller, R Victora
A comprehensive review and state of the art in the field of surface, interface, and thin-film magnetism is presented. New growth techniques which produce atomically engineered novel material, special characterization techniques to measure meagnetic

Error mitigation thresholds in noisy random quantum circuits

July 25, 2025
Author(s)
Pradeep Niroula, Sarang Gopalakrishnan, Michael Gullans
Extracting useful information from noisy near-term quantum simulations requires error mitigation strategies. A broad class of these strategies rely on precise characterization of the noise source. We study the performance of such strategies when the noise

Quantifying grating defects in X-ray Talbot-Lau interferometry through a comparative study of two fabrication techniques

April 24, 2025
Author(s)
Alexandre Pereira, Simon Spindler, Zhitian Shi, Lucia Romano, Michal Rawlik, Federica Marone, Martin Stauber, Marco Stampanoni, Daniel Josell
The performance of an X-ray grating interferometry system depends on the geometry and quality of the gratings. Fabrication of micrometer-pitch high-aspect-ratio gold gratings, which are essential for measuring small refraction angles at higher energies, is

Consistent Thermodynamic Properties for Alicyclic Components of Jet Fuels: Experimental Data, Estimation Methods, and Homologous Series Trends

April 19, 2025
Author(s)
Eugene Paulechka, Andrei Kazakov, Chris Muzny, Suphat Watanasiri, Abhijit Dutta
Cycloalkanes and their alkyl derivatives represent a significant fraction of jet fuel components. An evaluation of their thermodynamic properties, enthalpies of formation in liquid and gas phases as well as enthalpies of vaporization, was conducted. A

Binary Pseudo-Random Array for Calibration of Interferometers with Transmission Spheres and Cylinders

September 30, 2024
Author(s)
Ulf Griesmann, Keiko Munechika, Simon Rochester, Weilun Chao, Carlos Pina-Hernandez, Kaito Yamada, Michael Biskach, Peter Takacs, Valeriy Yashchuk
Binary pseudo-random array (BPRA) "white noise" artifacts are highly effective for characterizing the instrument transfer function (ITF) of surface topography metrology tools and wavefront measurement instruments. These BPRA artifacts feature all spatial

Pore Formation Driven by Particle Impact in Laser, Powder-blown Directed Energy Deposition

May 26, 2023
Author(s)
Edward Garboczi, Newell Moser, Samantha Webster, Kornel Ehmann, Jian Cao, Kamel Fezzaa, Tao Sun
Material manufactured by laser, powder-blown directed energy deposition often contains residual pores, which can be detrimental to the strength and fatigue life of a part. We uncover a new kind of pore formation that is driven by powder particle impact

Lower Bounds on Quantum Annealing Times

April 5, 2023
Author(s)
Luis Pedro Garcia-Pintos, Lucas Brady, Jacob Bringewatt, Yi-Kai Liu
The adiabatic theorem provides sufficient conditions for the time needed to prepare a target ground state. While it is possible to prepare a target state much faster with more general quantum annealing protocols, rigorous results beyond the adiabatic

Coalition and Threshold Hash-Based Signatures

February 25, 2022
Author(s)
John M. Kelsey, Stefan Lucks
We show how to construct a threshold version of stateful hash-based signature schemes like those defined in XMSS (defined in RFC8391) and LMS (defined in RFC8554). Our techniques assume a trusted dealer and secure point-to-point communications; are

Validation of Aerosol Dynamics in a Well-Stirred Isothermal Enclosure

September 30, 2021
Author(s)
Amy Mensch, Thomas Cleary
Modeling of aerosol dynamics in fire simulations enables predictions of the effects of soot, such as visibility and detection, and the fate of soot, such as deposition and emissions. NIST's fire modeling tool, Fire Dynamics Simulator (FDS), has implemented

Statistics of Visual Features in the Human Iris

August 16, 2021
Author(s)
George W. Quinn, James Matey, Patrick J. Grother, Edward Watters
In most current applications of iris recognition, matching is done by computer algorithms. The dominant algorithms are based on the work of John Daugman and are well understood because of the extensive analysis in the literature of iris2pi (the shorthand

A Data-Driven Framework for Team Formation for Maintenance Tasks

February 16, 2021
Author(s)
Maya Reslan, Emily Hastings, Michael Brundage, Thurston Sexton
Even as maintenance evolves with new technologies, it is still a heavily human-driven domain; multiple steps in the maintenance workflow still require human expertise and intervention. Various maintenance activities require multiple maintainers, all with
Displaying 5276 - 5300 of 7113
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