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Displaying 7076 - 7100 of 7113

2019 NIST/ITL Cybersecurity Program Annual Report

August 24, 2020
Author(s)
Patrick D. O'Reilly, Kristina G. Rigopoulos, Larry Feldman, Gregory A. Witte
During Fiscal Year 2019 (FY 2019), from October 1, 2018 through September 30, 2019, the NIST Information Technology Laboratory (ITL) Cybersecurity and Privacy Program successfully responded to numerous challenges and opportunities in security and privacy

Comparison of saturator designs for low volatility liquid precursor delivery

April 1, 2023
Author(s)
James E. Maslar, William A. Kimes, Vladimir B. Khromchenko, Brent Sperling, Ravindra Kanjolia
Low volatility precursors are widely utilized in chemical vapor deposition and atomic layer deposition processes. Such precursors are often delivered from one of two common saturator designs: a bubbler or a flow over vessel. Previous reports concerning

Versailles Project on Advanced Materials and Standards (VAMAS) Interlaboratory Study on Measuring the Number Concentration of colloidal gold nanoparticles

March 9, 2022
Author(s)
Caterina Minelli, Karen E. Murphy, Monique Johnson, Antonio Montoro Bustos, Jeffrey Fagan, Ingo Strenge
We describe the outcome of an international interlaboratory study of the measurement of particle number concentration of colloidal nanoparticles, project 10 of the technical working area 34, "Nanoparticle Populations" of the Versailles Project on Advanced

Study of Isochoric Specific Heat Capacity Measurements for Liquid Isobutane

October 12, 2021
Author(s)
Hiroyuki Miyamoto, Hiroshi Kitajima, Noboru Kagawa, Joe W. Magee, Seizo Tsuruno, Koichi Watanabe
Isobutane is one of the most promising alternative refrigerants because of its zero ODP and negligible GWP. It can be used not only as a pure component but also as a component of binary or ternary mixture refrigerants. To design and evaluate cycle

Workshop on Reliability Issues in Nanomaterials

August 1, 2005
Author(s)
Robert Keller, David T. Read, Roop L. Mahajan
The Workshop on Reliability Issues in Nanomaterials was held at the Boulder Laboratories of the National Institute of Standards and Technology (NIST) on August 17-19, 2004. It was designed to promote a particular subset of NIST?s responsibilities under the

Measured Performance of a 35 Kilowatt Roof Top Photovoltaic System

March 1, 2003
Author(s)
Arthur H. Fanney, E R. Weise, K R. Henderson
A 35-kilowatt roof top photovoltaic system has been installed at the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland. The system, located on a the roof that connects NIST s Administration Building to its adjoining conference

Relating Human and AI-based Detection Limits in SEM Dimensional Metrology

October 25, 2025
Author(s)
Peter Bajcsy, Pushkar Sathe, Andras Vladar
Background: The nanoscale measurements of critical dimensions in semiconductor manufacturing rely on scanning electron microscopy (SEM) and SEM image analyses. The acquisition of SEM images requires a low primary electron beam current and a low dose of the

Intermediate Scale Flame Spread Test Apparatus for CFD Fire Model Validation

March 27, 2025
Author(s)
Karen De Lannoye, Isaac Leventon
Upward and inclined flame spread are common fire-hazard scenarios that are particularly dangerous due to their relatively high spread rate (compared to downward or lateral spread). Several previous studies have addressed upward flame spread, both in

Quantifying High Density Polyethylene Flows in the United States using Material Flow Analysis

August 20, 2024
Author(s)
Abheek Chatterjee, Nehika Mathur, Daniel Figola, Matthew Triebe, Buddhika Hapuwatte, Ashley Hartwell, Katherine Morris
A Circular Economy (CE) aims to reduce natural resource consumption, waste generation, and related detrimental environmental, social, and economic impacts by retaining valuable materials in the economy as long as possible. This research focuses on the

Digital Twin Core Conceptual Models and Services

November 3, 2023
Author(s)
Shi-Wan Lin, Kym Watson, Guodong Shao, Ljiljana Stojanovic, Bassam Zarkout
To improve operational efficiency and enhance competitiveness in business, organizations are broadly undergoing digital transformation. As a foundation for digital transformation, digital twins enable system operators to dynamically represent, diagnose

Quantitative relationships between film morphology, charge carrier dynamics, and photovoltaic performance in bulk-heterojunction binary vs. ternary acceptor blends

February 7, 2023
Author(s)
Weigang Zhu, Guoping Li, Subhrangsu Mukherjee, Natalia Powers-Riggs, Leighton Jones, Eliot Gann, R Joseph Kline, Andrew Herzing, Jenna Logsdon, Lucas Flagg, Charlotte Stern, Ryan Young, Kevin Kohlstedt, George Schatz, Dean DeLongchamp, Michael Wasielewski, Ferdinand Melkonyan, Antonio Facchetti, Tobin Marks
Addressing pertinent and perplexing questions regarding why nonfullerene acceptors (NFAs) promote higher power conversion efficiencies (PCEs) than traditional fullerenes and how photoactive bulk heterojunction (BHJ) film morphology, charge photogeneration

Shape comparison between 0.4 ym to 2.0 ym and 20 ym to 60 ym cement particles

June 15, 2010
Author(s)
L Holzer, R Flatt, S.T. Erodgan, Jeffrey W. Bullard, Edward Garboczi
Portland cement powder has a wide particle size distribution, from approximately 0.1 υm to 60 υm. This wide powder size distribution arises via the grinding of much larger clinker particles in fact, several percent of the world s energy expenditures are

Measurements and Predictions of the Aerosol Dynamics of Smoke

September 30, 2022
Author(s)
Amy Mensch, Haley Hamza, Thomas Cleary
Better understanding and ability to predict the aerosol dynamics of soot can improve life safety predictions generated by fire modeling tools. NIST's fire modeling tool, Fire Dynamics Simulator (FDS), is commonly used by the international fire protection

Effects of Intervalence Charge Transfer Interaction between p-Stacked Mixed Valent Tetrathiafulvalene Ligands on the Electrical Conductivity of 3D Metal-Organic Frameworks

October 20, 2021
Author(s)
Shiyu Zhang, Dillip K. Panda, Ashok Yadav, Wei Zhou, Sourav Saha
Achieving molecular-level understanding of how the structures and compositions of metal–organic frameworks (MOFs) influence their charge carrier concentration and charge transport mechanism—the key parameters that dictate their electronic band gaps and

Measured Performance of Building Inegrated Photovoltaic Panels - Round 2

August 1, 2005
Author(s)
Brian P. Dougherty, Arthur H. Fanney, Mark W. Davis
Architects, building designers, and building owners presently lack sufficient resources for thoroughly evaluating the economic impact of building integrated photovoltaics (BIPV). The National Institute of Standards and Technology (NIST) is addressing this
Displaying 7076 - 7100 of 7113
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