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Displaying 13026 - 13050 of 17285

Building Design Considerations to Support Immediate Occupancy Performance Objectives

June 16, 2019

Author(s)

Siamak Sattar, Christopher Segura, Katherine Johnson, Therese P. McAllister, Steven McCabe

… hazards, the U.S. Senate tasked the National Institute of Standards and Technology (NIST) with identifying research … with cooperative efforts among researchers, engineers, standards and code officials, and community stakeholders …

Physical-Layer Analysis of IEEE 802.11ay SU-MIMO using the Quasi-Deterministic Channel Model with Measurements

May 24, 2019

Author(s)

Anuraag Bodi, Jiayi Zhang, Jian Wang, Camillo Gentile

Physical-layer analysis on millimeter-wave systems to date have used channels models reduced from measurements in static environments. This is because most millimeter-wave channel sounders take hours for a full channel sweep due to the slow mechanical

Dynamical Correlations for Statistical Copolymers from High-Throughput Broadband Dielectric Spectroscopy

February 22, 2019

Author(s)

Xiao Zhang, Jing Zhao, Changhuai Ye, Tzu Yu Lai, Chad R. Snyder, Alamgir Karim, Kevin A. Cavicchi

Broad-band dielectric spectroscopy (BDS) provides a powerful method of characterizing relaxation dynamics in diverse materials. Here we describe and employ a novel instrument for high-throughput broadband dielectric spectroscopy (HTBDS) that accelerates

CCQM-K95.1 Low-Polarity Analytes in a Botanical Matrix: Polycyclic Aromatic Hydrocarbons (PAHs) in Tea

November 30, 2018

Author(s)

David L. Duewer, Jacolin A. Murray, Laura J. Wood, Stephen A. Wise

Extraction, chromatographic separation, and quantification of low-concentration organic compounds in complex matrices are core challenges for reference material producers and providers of calibration services. Evidence of successful participation in formal

Residual Stress in Polycrystalline Alumina: Comparison of Two-Dimensional Maps and Integrated Scans in Fluorescence-Based Measurements

August 18, 2018

Author(s)

Chris A. Michaels, Robert F. Cook

The spatially heterogeneous residual stress fields in a series of three polycrystalline alumina materials are compared using two fluorescence-based measurement techniques. In the first technique, 18 hyperspectral arrays of the Cr-based R1 and R2 ruby

A Reference Material for Evaluation of Cs-137 Radiochronometric Measurements

August 16, 2018

Author(s)

Kevin B. Lavelle, Richard Essex, Jeffrey T. Cessna, Kevin P. Carney, Cole R. Hexel

A new nuclear forensic reference material has been characterized as a standard for radiochronometric determination of the model purification date for 137Cs sources. The purification date of a radioactive source is a potentially diagnostic nuclear forensic

Evaluation of Wind Pressure Coefficients on Low-Rise Building Enclosures Using Modern Wind Tunnel Data

December 1, 2017

Author(s)

Dat Duthinh, Matthew L. Gierson, Philip N. Bryan, Bilal Ayyub

External pressure coefficients specified in the ASCE 7-10 Standard, used to determine design wind pressures for the components and cladding of buildings, are developed from wind tunnel test data that date back 30 to 50 years. In recent decades, advances in

A Methodology for Estimating Seismic Retrofit Costs

September 28, 2017

Author(s)

Juan Fung, David Butry, Siamak Sattar, Steven McCabe

Presidential Executive Order 13717 (EO 13717), Establishing a Federal Earthquake Risk Management Standard, encourages federal agencies to "enhance resilience...[to] future earthquakes" by evaluating and retrofitting existing federal buildings based on

Restricting Insider Access through Efficient Implementation of Multi-Policy Access Control Systems

October 28, 2016

Author(s)

Peter M. Mell, Serban I. Gavrila, James Shook

… The American National Standards Organization has standardized an access control …

Measuring Temperature in Emission Testing Micro-chambers

October 24, 2016

Author(s)

Dustin G. Poppendieck, Edwin Guillermo, Havishk Tripathi

ASTM subcommittee D22.05 on Indoor Air is working to finalize WK40293: Standard Test Method for Estimating Chemical Emissions from Spray Polyurethane Foam (SPF) Insulation Using Micro-Scale Environmental Test Chambers. One issue in WK40293 is determining

A Snapshot of 118 Solid State Lighting Testing Laboratories' Capabilities

June 23, 2016

Author(s)

C Cameron Miller, Hannah Hasting, Maria Nadal

… The National Institute of Standards and Technology (NIST) began to offer proficiency …

Gulf of Mexico Research Initiative 2014/2015 Hydrocarbon Intercalibration Experiment: Description and Results for SRM 2779 Gulf of Mexico Crude Oil and Candidate SRM 2777 Weathered Gulf of Mexico Crude Oil

April 20, 2016

Author(s)

Jacolin A. Murray, Lane C. Sander, Stephen A. Wise, Christopher M. Reddy

… crude oil samples provided by the National Institute of Standards and Technology (NIST): Standard Reference Material …

Landauer's formula with finite-time relaxation: Kramers' crossover in electronic transport

April 20, 2016

Author(s)

Daniel S. Gruss, Kirill Velizhanin, Michael P. Zwolak

Landauer's formula relates the conductance of a region of interest to its transmission probability. It is the standard theoretical tool to examine ballistic transport in nano- and meso-scale junctions and devices. This view of transport as transmission

Measurement science challenges that complicate the assessment of the potential ecotoxicological risks of carbon nanomaterials

April 1, 2015

Author(s)

Elijah J. Petersen

… government scientist working at the National Institute of Standards and Technology (NIST), a national metrology …

Movement on Stairs During Building Evacuations

September 25, 2014

Author(s)

Erica D. Kuligowski, Richard D. Peacock, Paul Reneke, Emily A. Wiess, Jason Averill, Robert Hagwood, Enrico Ronchi, Bryan Hoskins, Michael Spearpoint

… the Engineering Laboratory at the National Institute of Standards and Technology (NIST) has been collecting stairwell … and develop a technical foundation for future codes and standards requirements. NIST has collected fire drill …

Community Resilience: The Role of the Built Environment

June 27, 2014

Author(s)

Therese P. McAllister

… has established a research program to improve guidance, standards, and tools that supports community resilience … level, and a scientific foundation for developing improved standards, codes, guidelines, and tools to enhance community …

Certified Miniaturized Charpy Specimens for the Indirect Verification of Small-Size Impact Machines

June 27, 2013

Author(s)

Enrico Lucon

… space, and other factors. The National Institute of Standards and Technology (NIST) is currently developing …

Incorporating Adult Learning Methods and Project Based Learning in Laboratory Metrology Courses

June 15, 2013

Author(s)

Georgia L. Harris

… (OEMs) of precision measuring equipment and measurement standards. What often happens in the measurement community is … Over the past 3 years, the National Institute of Standards and Technology (NIST) Office of Weights and …

Differentiation and characterization of isotopically modified silver nanoparticles in aqueous media using asymmetric-flow field flow fractionation coupled to optical detection and mass spectrometry

December 10, 2012

Author(s)

Julien C. Gigault, Vincent A. Hackley

The principal objective of this work was to develop and demonstrate a new methodology for silver nanoparticle (AgNP) detection and characterization based on asymmetric-flow field flow fractionation (A4F) coupled to multiple detectors and using stable

An Empirical Bayes Approach to Robust Variance Estimation: A Statistical Proposal for Quantitative Medical Image Testing

October 23, 2012

Author(s)

John Lu, Charles D. Fenimore

The current standard for measuring tumor response using X-ray, CT and MRI is based on the response evaluation crite- rion in solid tumors (RECIST) which, while providing simplifications over previous (WHO) 2-D methods, stipulate four response categories

Overall and Local Movement Speeds During Fire Drill Evacuations in Buildings up to 31 Stories

February 4, 2012

Author(s)

Richard D. Peacock, Bryan L. Hoskins, Erica D. Kuligowski

… and Fire Research Laboratory at the National Institute of Standards and Technology (NIST) has been collecting stairwell … and develop a technical foundation for future codes and standards requirements. To date, NIST has collected fire …

Only non-informative Bayesian prior distributions agree with the GUM Type A evaluations of input quantities

June 21, 2011

Author(s)

Raghu N. Kacker

The Guide to the Expression of Uncertainty in Measurement (GUM) is self-consistent when Bayesian statistics is used for the Type A evaluations and the standard deviation of the posterior state-of-knowledge distribution is used as the Bayesian standard

NIST Tools for Quality Assurance in Botanical Dietary Supplement Measurements

April 7, 2011

Author(s)

Melissa M. Phillips

… contribute to the difficulty. The National Institute of Standards and Technology (NIST) has been working with the …

A NUMERICAL STUDY OF THE RELEASE AND DISPERSION OF A BUOYANT GAS IN PARTIALLY CONFINED SPACES

March 4, 2011

Author(s)

Kuldeep R. Prasad, William M. Pitts, Jiann C. Yang

… it can be used reliably for development of codes and standards appropriate for hydrogen fire safety. This paper … on future modeling efforts as well as codes and standards related to hydrogen fire safety. …

In Vitro Studies for Detection of CYP27A1 Modifications with Iso[4]levuglandin E 2 in Human Retina

February 17, 2011

Author(s)

Illarion Turko, Casey Charvet, Wei-Li Liao, Gun-Young Heo, Laird James, Salomon G. Robert, Irina A. Pikuleva

… monitoring (MRM) assay with 15N-labeled protein internal standards for detection and quantitative analysis of pyrrole, …

Advanced communications
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