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Displaying 51 - 75 of 1911

Field test of ATSC 3.0/BPS precise time distribution

April 5, 2025
Author(s)
Jeffrey Sherman, David Howe
… time transfer between a reference clock at a ATSC 3.0 transmitter and a BPS receiver's disciplined-clock … at Earth's surface. In 2024, BPS was added to the ATSC 3.0 transmission of the station KWGN in the Denver, Colorado … Field test of ATSC 3.0/BPS precise time distribution …

Quantifying Reactor Power Noise - A Case Study on NIST Research Reactor

May 26, 2023
Author(s)
Anil Gurgen, Dagistan Sahin, James R. Whipple
Water cooled reactors experience reactivity changes when voids are present in the coolant. The fraction of coolant in the core diminutions in the event of boiling, and the reactivity feedback can either be positive due to reducing neutron absorption in the

30 GHz regenerative frequency divide-by-3

August 15, 2022
Author(s)
Archita Hati, Marco Pomponio, Connor Humiston, John Lettang, Craig Nelson
… We report the performance of a 30 GHz to 10 GHz regenerative frequency divider. The proposed … 30 GHz regenerative frequency divide-by-3 …

Relevance assessment: are judges exchangeable and does it matter?

July 21, 2008
Author(s)
Ian M. Soboroff, Peter Bailey, Nick Craswell, Alan Smeaton, Emine Yilmaz, Paul Thomas
… who are task experts but did not create topics; and bronze standard judges, who are those who did not define … assessments have been created by silver standard or bronze standard judges. We find that both system scores and … if these judges vary widely in task and topic expertise. Bronze stan- dard judges may be able to substitute for topic …

Compressive Prestrain in High-Niobium-Fraction Nb 3 Sn Superconductors

June 1, 2005
Author(s)
John (Jack) W. Ekin, Najib Cheggour, Mike Abrecht, Cameron C. Clickner, Michael Field, Seungok Hong, Jeffrey Parrell, Y. Zhang
… in conductors with high niobium fractions of 20% to 30%. Values of the pre-strain, ε max in these conductors are … less than the ε max values of 0.2% to 0.4% in traditional bronze-process Nb 3 Sn conductors (where niobium fractions …

Temperature Measurements of Microhotplates Using Fluorescence Thermometry

March 1, 2006
Author(s)
Christopher W. Meyer, Douglas C. Meier, Christopher B. Montgomery, Stephen Semancik
… fluorescence lifetimes of a film of the phosphor Mg4(F)GeO6:Mn which is deposited on the … Temperature/fluorescence-lifetime relations for this phosphor are determined by measuring the fluorescence lifetime of the phosphor-coated hot junction of a type S thermocouple while …

Guide for Conducting Risk Assessments

September 17, 2012
Author(s)
Ronald S. Ross
… The purpose of Special Publication 800-30 is to provide guidance for conducting risk assessments of … complement and inform each other. [Supersedes SP 800-30 (July 2002): … Special Publication (NIST SP) - 800-30 Rev 1 …

A Novel Wafer-plane Dosimeter for EUV Lithography

November 1, 2009
Author(s)
Steven E. Grantham, Charles S. Tarrio
… begun working on a wafer plane dosimeter, based on storage phosphor technology, which can pass through a stepper as … least 4 orders of magnitude. A dosimeter based on storage phosphor can be constructed in a configuration such that it …

The Chemical Structure of a 30 cm Methanol Pool Fire

April 25, 2020
Author(s)
Ryan Falkenstein-Smith, Kunhyuk Sung, Jian Chen, Anthony Hamins
… gas species measurements made along the centerline of a 30 cm methanol pool fires steadily burning in a quiescent … The Chemical Structure of a 30 cm Methanol Pool Fire …

Balanced Design Concepts Workshop. June 30, July 1-2, 1993.

September 1, 1993
Author(s)
Richard W. Bukowski
… and notes from three breakout sessions held during a June 30 to July 2 workshop. The purpose of the workshop was to … Balanced Design Concepts Workshop. June 30, July 1-2, 1993. …

Chemical Force Microscopy of 30 nm Half-Pitch Latent Images in Poly(Methyl-Methacrylate)

October 16, 2008
Author(s)
John T. Woodward IV, Harun Solak
… thin films were spun cast on silicon and exposed to a 30 nm half-pitch EUV interference pattern. The sample was … The CFM images can clearly resolve the latent image of the 30 nm lines and show increasing contrast with increasing EUV … Chemical Force Microscopy of 30 nm Half-Pitch Latent Images in Poly(Methyl-Methacrylate) …

Users Manual for Version 3.0 of the Cost-Effectiveness Tool for Capital Asset Protection

September 1, 2007
Author(s)
Robert E. Chapman, Amy S. Rushing
… presented in NISTIR 7073. This document focuses on Version 3.0 of the Cost-Effectiveness Tool (CET 3.0); it describes: the input data requirements for the … the alternative combinations of mitigation strategies. CET 3.0 addresses uncertainty and financial risk in a structured, …

CEMHYD3D: A Three-Dimensional Cement Hydration and Microstructure Development Modeling Package. Version 3.0.

June 8, 2005
Author(s)
Dale P. Bentz
… documentation and computer program listings for version 3.0 of the three-dimensional cement hydration and … cement particles in the initial microstructure. In version 3.0, these three programs have been combined into a single … the improvements and enhancements to CEMHYD3D for version 3.0 have been made in the programs simulating the hydration …

Investigation of a Simulated Chinese Jade Dagger by Neutron Radiography and Prompt Gamma Activation Analysis

August 15, 2018
Author(s)
Richard Livingston, Ariel O'Connor, Jacob LaManna, Heather H. Chen-Mayer, Danyal J. Turkoglu
… during the Shang dynasty, ca. 1600-1046 BCE, jade and bronze dagger-axes (ge) were used by the elite as ritual … nephrite jade [Ca2(Mg, Fe)5Si8O22(OH)2] blade mounted in a bronze haft. Several of these daggers are held by the … radiography to image the jade tang hidden within the bronze haft and uncover early manufacturing techniques. As a …

6 LiF:ZnS(Ag) Mixture Optimization for a Miniature Highly Efficient Cold Neutron Detector

April 2, 2018
Author(s)
A. Osovizky, Kevin N. Pritchard, Jeffrey B. Ziegler, Louis E. Binkley, Y. Yehuda-Zada, Peter NMN Tsai, Alan Keith Thompson, P. Yvonne Barnes, Kerry Siebein, Nancy Hadad, M. Jackson, C. Hurlbut, R. Ibberson, George M. Baltic, Charles Majkrzak, Nicholas C. Maliszewskyj
… wavelenght) neutrons but mediocre neutron sensitivity (30%). Our optimization took the form of selecting the appropriate phosphor stoichiometry, to ensure high neutron capture …
Displaying 51 - 75 of 1911
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