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Search Publications

NIST Authors in Bold

Displaying 1001 - 1025 of 73898

On Predistortion Filtering for Switched Beamforming With Phased-Array Antennas

March 26, 2023
Author(s)
Jack Chuang, Camillo Gentile
In recent work, we proposed sweeping the antennas of phased arrays and beamforming in postprocessing – what we coined switched beamforming – instead of sweeping beams through analog beamforming – what the arrays are designed for. Not only is it orders of

Developing an Appropriate Heat Treatment Protocol for Additively Manufactured Alloy 718 for Oil and Gas Applications

March 23, 2023
Author(s)
Mark R. Stoudt, James Zuback, Carelyn E. Campbell, Maureen E. Williams, Kil-Won Moon, Carlos R. Beauchamp, Mark Yunovich
The combination of strength, corrosion resistance, and excellent weldability makes Alloy 718 an attractive alloy for additive manufacturing (AM) applications, but the AM build process generates considerable residual stresses, and large compositional and

Experimental Ambitions for DC-Area Quantum Network Testbed

March 23, 2023
Author(s)
Oliver T. Slattery, Adam Black
Quantum networks [1] bear the promise of one day enabling diverse applications such as secure communications, distributed quantum computing, distributed sensing, and time distribution, in addition to other applications not yet identified. In recent years

Experimental Studies on the Heat Flux of Individual Firebrands

March 22, 2023
Author(s)
Amy Mensch, Savannah Wessies, Anthony Hamins, Jiann C. Yang
Every year, thousands of wildfires burn all over the world threatening lives and property in the wildland-urban interface. These wildland-urban interface fires spread by radiation, direct flame contact, or firebrand transport. Firebrand exposures are a

Food Nutrition and Safety Measurements Quality Assurance Program: Exercise 1 Final Report

March 22, 2023
Author(s)
Colleen E. Bryan Sallee, Melissa M. Phillips, Charles Barber, Carolyn Burdette, Shaun Kotoski, Laura Wood
The Food Nutrition and Safety Measurements Quality Assurance Program (FNSQAP) was launched in 2021. FNSQAP was established to assist laboratories in the development and validation of new analytical methods, in improving the quality of their analytical

IoT Capabilities Composition and Decomposition: A Systematic Review

March 22, 2023
Author(s)
Edward Griffor, Khalid Halba, ahmed lbath, Anton Dahbura
Internet of Things (IoT) capabilities are features or services produced by IoT devices. IoT capabilities composition brings existing capabilities together to create a novel service with added value. IoT Capabilities decomposition works the other way around

Measurements and model of UV-induced oxidation of aluminum

March 22, 2023
Author(s)
Robert F. Berg, Charles S. Tarrio, Thomas B. Lucatorto
We present measurements and a model of aluminum oxidation induced by ultraviolet (UV) radiation. Spots of oxide were grown by focusing synchrotron radiation onto a polycrystalline aluminum membrane in the presence of water vapor at pressures from 3×10-8

Spin-orbital order and excitons in magnetoresistive HoBi

March 22, 2023
Author(s)
Jonathan N. Gaudet, H. Yang, E. Smith, T. Halloran, J. Clancy, Jose Rodriguez Rivera, Guangyong Xu, Yang Zhao, Wangchun Chen, G. Sala, Adam A. Aczel, B. Gaulin, Fazel Tafti, Collin L. Broholm
The magnetism of the rock-salt fcc rare-earth monopnictide HoBi, a candidate topological material with extreme magnetoresistance, is investigated. From the Ho3+ non-Kramers J=8 spin-orbital multiplet, the cubic crystal electric field yields six near

Dynamic Measurement of Gas Flow using Acoustic Resonance Tracking

March 21, 2023
Author(s)
Jodie Gail Pope, Keith A. Gillis, James W. Schmidt
We measured gas flows exiting large, un-thermostated, gas-filled, pressure vessels by tracking the time-dependent pressure P(t) and resonance frequency fN(t) of an acoustic mode N of the gas remaining in each vessel. This is a proof-of-principle

New Method for Determining Time Constant of Resistors

March 21, 2023
Author(s)
Yicheng Wang, Dean G. Jarrett, Andrew D. Koffman, Stephan Schlamminger
We report a new method for determining the time constant of ac resistors with values around 10 kΩ, using a digital impedance bridge for comparison of two nominally equal resistors. The method involves adding a probing capacitor in parallel to one of the

Ultrafast ID-VG Technique for Reliable Cryogenic Device Characterization

March 21, 2023
Author(s)
Pragya Shrestha, Akin Akturk, Brian Hoskins, Advait Madhavan, Jason Campbell
An in-depth understanding of the transient operation of devices at cryogenic temperatures remains experimentally elusive. However, the impact of these transients has recently become important in efforts to develop both electronics to support quantum

Using Plasma Vitellogenin in Loggerhead Sea Turtles to Assess Reproductive Maturation and Estrogen-Like Contaminant Exposure

March 21, 2023
Author(s)
Raquel Corniuk, Jennifer Lynch, Michael Arendt, Joanne Braun-McNeill, David Owens, Roldan Valverde, John Kucklick, Patricia McClellan-Green
Vitellogenin (VTG), an egg yolk precursor, is abnormally produced by male and juvenile oviparous species after exposure to estrogens. Plasma VTG in loggerhead sea turtles (Caretta caretta) helped us understand their reproductive maturation and investigate

Examining the effectiveness of water suppression for mitigating backdrafts

March 19, 2023
Author(s)
Ryan Falkenstein-Smith, Thomas Cleary
An analysis of the backdraft phenomenon's mitigation from water suppression is con- ducted in a 2/5th scale compartment. Different volumes of water were introduced via a ceiling- mounted misting nozzle into the compartment, which hosted conditions

Investigating the Harmonic Dependence of MPI Resolution

March 19, 2023
Author(s)
Mark-Alexander Henn, Thinh Bui, Solomon I. Woods
In this work we investigate how the MPI resolution changes as a function of signal harmonics. Based on a simulation study that models a lock-in measurement of the point spread function we apply our findings to actual measurement data obtained from NIST's

Investigating the Influence of Sampling Frequency on X-Space MPI Image Reconstructions

March 19, 2023
Author(s)
Mark-Alexander Henn, Klaus Natorf Quelhas, Solomon I. Woods
In this presentation we employ a direct X-space deconvolution to estimate particle distributions from MPI data. We report on how the accuracy of those estimations changes as a function of sampling frequency and compare the findings to the MPI core operator

Multiverse: Quantum Optical Network Management

March 19, 2023
Author(s)
Abdella Battou
This paper presents the software-defined management system of DC-QNet, a quantum network testbed deployed across multiple distant sites. The system uses a network management system (NMS) to manage the optical network, the classical IP network, and the
Displaying 1001 - 1025 of 73898