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Displaying 4251 - 4275 of 73843

A Simple Two-Step Reaction Scheme for Soot and CO

May 23, 2022
Author(s)
Kevin McGrattan, Randall McDermott, Jason E. Floyd
A relatively simple two-step combustion model is proposed for predicting soot and CO generation in under-ventilated fire simulations. The scheme consists of two mixing-controlled reaction steps performed in series. Validation calculations are described

How reproducible are surface areas calculated from the BET equation?

May 23, 2022
Author(s)
Johannes W. Osterreith, James Rampersad, David Madden, Nakul Rampal, Luka Skoric, Bethany Connolly, Rob Ameloot, Joao Marreiros, Conchi Ania, Diana Azevedo, Enrique VilarrasaGarcia, Bianca Santos, Daniel Siderius
Porosity and surface area analysis plays a prominent role in modern materials science, where their determination spans the fields of natural sciences, engineering, geology and medical research. At the heart of this sits the Brunauer-Emmett-Teller (BET)

Improved Accuracy for Calibrated Mass Distribution Measurements of Bimetallic Nanoparticles

May 23, 2022
Author(s)
Kaleb Duelge, George Mulholland, Antonio Montoro Bustos, Michael Zachariah, Michael Zachariah, John Pettibone
Implementation of hybrid nanoparticles (HNPs), consisting of two different metal components, into applied systems has been hindered by an incomplete understanding of structural and chemical properties responsible for their enhanced, yet inconsistent

Pairs of Heron and right triangles with a common area and a common perimeter

May 23, 2022
Author(s)
Abhishek Juyal, Dustin Moody
A Heron triangle is one in which the side lengths and area are integers. An integral right triangle is an example of a Heron triangle. In this paper, we show that there are infinitely many pairs of integral right triangles and Heron triangles with a common

MILLIGRAM MASS METROLOGY FOR QUANTITATIVE DEPOSITION OF LIQUID SAMPLES

May 22, 2022
Author(s)
Gordon A. Shaw
Quantitative dispensing of liquids by mass becomes increasingly difficult as sample volume decreases. Whereas milliliter quantities of liquid can be directly weighed as dispensed on an analytical balance or using pycnometer methods, microliter samples are

A Data Structure for Integrity Protection with Erasure Capability

May 20, 2022
Author(s)
D. Richard Kuhn
This document describes a data structure, referred to as a data block matrix, that supports the ongoing addition of hash-linked records while also allowing for the deletion of arbitrary records, thereby preserving hash-based integrity assurance that other

Electro-Optically Derived Arbitrary Millimeter-Wave Sources with 100 GHz of Bandwidth

May 20, 2022
Author(s)
Bryan Bosworth, Nick Jungwirth, Kassiopeia Smith, Jerome Cheron, Franklyn Quinlan, Madison Woodson, Jesse Morgan, Andreas Beling, Ari Feldman, Dylan Williams, Nate Orloff, Chris Long
We demonstrate fine phase and amplitude control of millimeter waves, measured on-wafer using an electro-optic frequency comb, programmable spectral filter, and a uni-traveling carrier photodiode. We then synthesize arbitrary waveforms with 100 GHz of

Indium Bump Process for Low-Temperature Detectors and Readout

May 20, 2022
Author(s)
Tammy Lucas, John Biesecker, W.Bertrand (Randy) Doriese, Shannon Duff, Gene C. Hilton, Joel Ullom, Michael Vissers, Dan Schmidt
We describe our indium bump process for low-temperature detectors and associated readout. A titanium nitride under bump metallization layer (UBM) is reactively sputtered onto wiring pads as a diffusion barrier and adhesion layer. Indium is thermally

Interoperability Profile for Electric Vehicle Fleet Managed Charging

May 20, 2022
Author(s)
Cuong Nguyen
This application profile analyzes the capabilities of IEEE 2030.5-2018, an available smart grid focused open communication standard, to effectuate a use case that defines the communications aspects of the business function of an electric utility executing

NIST Cybersecurity Role-based Training Study Presentation

May 20, 2022
Author(s)
Jody Jacobs, Julie Haney, Susanne M. Furman
This presentation is for the May 17, 2022 Federal Information Security Educators (FISSEA) Spring Forum hosted by NIST. This presentation will present our preliminary findings from our Role-Based Training Study.

Value of information and decision pathways: Concepts and case studies

May 20, 2022
Author(s)
Pierre Glynn, Charles Rhodes, Scott Chiavacci, Jennifer Helgeson, Carl Shapiro, Crista Straub
Information plays a key role in the policy decision-making process – but the collection and dissemination of information carries costs. Understanding how these costs compare to the benefits of having the information (this is the value of information: "VOI"

Deep Learning for Path Loss Prediction in the 3.5 GHz CBRS Spectrum Band

May 19, 2022
Author(s)
Thao T. Nguyen, Raied Caromi, Kassem Kallas
In the 3.5 GHz citizen broadband radio service (CBRS) band, accurate path loss prediction is very important to protect the incumbent from harmful interference caused by the lower tier users. Within the current CBRS standards developed by the Wireless

Gauging the difficulty of image segmentation

May 19, 2022
Author(s)
Marek Franaszek
Image segmentation is the first step in a complex process of object recognition. This report presents a method to gauge the difficulty of segmentation by calculating a scalar parameter Q for an image. This parameter depends on a distribution of the
Displaying 4251 - 4275 of 73843
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