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Standards

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Displaying 226 - 250 of 830

Reference Correlation for the Thermal Conductivity of Ethane-1,2-diol (Ethylene Glycol) from the Triple Point to 475 K and Pressures up to 100 MPa

September 14, 2021
Author(s)
Marko Mebelli, Danai Velliadou, Marc Assael, Konstantinos D. Antoniadis, Marcia L. Huber
We present a new wide-ranging correlation for the thermal of ethane-1,2-diol (ethylene glycol) based on critically evaluated experimental data. The correlation is designed to be used with an existing equation of state, and it is valid from the triple point

Visualizing Model-based Product Definitions in Augmented Reality

August 23, 2021
Author(s)
Teodor Vernica, Robert R. Lipman, William Z. Bernstein
Augmented reality (AR) technologies present immense potential for the design and manufacturing communities. However, coordinating traditional engineering data representations into AR systems without loss of context and information remains a challenge. A

Ultraviolet Radiation Technologies and Healthcare Associated Infections: Standards and Metrology Needs

August 20, 2021
Author(s)
Dianne L. Poster, C Cameron Miller, Richard Martinello, Norman Horn, Michael T. Postek, Troy Cowan, Yaw S. Obeng, John J. Kasianowicz
The National Institute of Standards and Technology (NIST) hosted an international workshop on ultraviolet-C (UV-C) disinfection technologies on January 14 – 15, 2020 in Gaithersburg, Maryland in collaboration with the International Ultraviolet Association

A System for Validating Resistive Neural Network Prototypes

July 27, 2021
Author(s)
Brian Hoskins, Mitchell Fream, Matthew Daniels, Jonathan Goodwill, Advait Madhavan, Jabez J. McClelland, Osama Yousuf, Gina C. Adam, Wen Ma, Muqing Liu, Rasmus Madsen, Martin Lueker-Boden
Building prototypes of heterogeneous hardware systems based on emerging electronic, magnetic, and photonic devices is an increasingly important area of research. On the face of it, the novel implementation of these systems, especially for online learning

Comparison Demonstrates Factor of Three Improvement in Gas Flow Measurements

July 21, 2021
Author(s)
John D. Wright, Gina Kline, Kevin John, Brian Novitsky, Jason Bellavance, Kevin SHufelt, Bradley Nease, Miles Owen, Joseph Allen, Casey Rombouts, William Gause, John Cuccio
A comparison of seven gas flow calibration laboratories piloted by NIST used four laminar flow meters as the transfer standards for nine nitrogen gas flows ranging from 1 sccm to 10 slm. The comparison reference value was calculated from the uncertainty

NVLAP Federal Warfare System(s)

July 21, 2021
Author(s)
Bradley Moore, John Matyjas, Raymond Tierney, Jesse Angle, Jeannine Abiva, Jeff Hanes, David Dobosh, John Avera
NIST Handbook 150-872 presents the technical requirements and guidance for the accreditation of laboratories under the National Voluntary Laboratory Accreditation Program (NVLAP) Federal Warfare System(s) (FWS) program. It is intended for information and

Facility for calibrating anemometers as a function of air velocity vector and turbulence

July 19, 2021
Author(s)
Iosif Isaakovich Shinder, Michael R. Moldover, James Filla, Aaron Johnson, Vladimir B. Khromchenko
NIST calibrates anemometers as a function of airspeed vector and turbulence intensity (Tu). The vector capability (sometimes called '3D') is particularly important for calibrating multi-hole differential-pressure probes that are often used to quantify

Integrating MTConnect and IndoorGML for Asset Monitoring and Indoor Navigation

July 16, 2021
Author(s)
Aaron M. Hanke, Teodor Vernica, William Z. Bernstein
Interoperability across emerging visualization modalities, including augmented reality (AR) and virtual reality (VR), remains a challenge with respect to industrial applications. One critical issue relates to the lack of standard approaches for

Reference standards for accurate validation and optimization of assays that determine integrated Lentiviral vector copy number in transduced cells

July 11, 2021
Author(s)
Barbara S. Paugh, Lajos Baranyi, Andre Roy, Hua-Jun He, Lindsay Harris, Kenneth Cole, Caroline Raimund, Patricia S. Langan, Moria Artlip, Srikanta Jana, Rimas J. Orentas, Sheng Lin-Gibson, Winfried Krueger, Boro Dropuli?
Lentiviral vectors (LV) have emerged as a robust technology for therapeutic gene delivery into human cells as advanced medicinal products. As these products are increasingly commercialized, there are concomitant demands for their characterization to ensure

NVLAP Energy Efficient Lighting Products

July 6, 2021
Author(s)
Timothy Rasinski, C Cameron Miller
NIST Handbook 150-1, NVLAP Energy Efficient Lighting Products, presents the technical requirements and guidance for the accreditation of laboratories under the NVLAP Energy Efficient Lighting Products LAP.

Chapter 3: Engaging Communities and Stakeholders in Implementing NNBF

July 1, 2021
Author(s)
Maria Dillard, Cath Brooks, Helen Fisher, Hans Pietersen, Alwin Nijhuis, Anita van Breda, Susan Durden
Engagement is an important and necessary part of all planning and decision-making for any infrastructure project. Engagement is included at each step of the natural and nature-based features (NNBF) framework (steps detailed in Chapter 2) because we assume

CODATA Recommended Values of the Fundamental Physical Constants: 2018

June 30, 2021
Author(s)
Eite Tiesinga, Peter Mohr, David B. Newell, Barry Taylor
We report the 2018 self-consistent values of constants and conversion factors of physics and chemistry recommended by the Committee on Data of the Interna- tional Science Council (CODATA). The recommended values can also be found at physics.nist.gov

LIQUID FLOW METER CALIBRATIONS WITH NIST's 15 kg/s WATER FLOW STANDARD

June 15, 2021
Author(s)
Jodie Gail Pope, Aaron Johnson, James Filla, Vern E. Bean, Michael R. Moldover, Joey Boyd, Christopher J. Crowley, Iosif Isaakovich Shinder, Keith A. Gillis, John D. Wright
We describe the 15 kg/s water flow calibration standard operated by the Fluid Metrology Group of the National Institute of Standards and Technology (NIST) to calibrate liquid flow meters for customers. The 15 kg/s standard is a dynamic, gravimetric, liquid

Multiplatform Standards and Guidelines Publishing at NIST

May 20, 2021
Author(s)
Kathryn Miller
The National Institute of Standards and Technology is a nonregulatory agency of the U.S. Department of Commerce. One of the agency's responsibilities is to develop industry standards and guidelines, which are published as NIST Technical Series publications

Study of 5G New Radio (NR) Support for Direct Mode Communications

May 7, 2021
Author(s)
Fernando Cintron, David W. Griffith, Chunmei Liu, Richard A. Rouil, Yishen Sun, Jian Wang, Peng Liu, Chen Shen, Aziza Ben Mosbah, Samantha Gamboa Quintiliani
In public safety communications, direct mode communication is essential to keep first responders connected, especially when there is no network coverage. Direct mode communication is supported in Third Generation Partnership Project (3GPP) Long Term

Use Case Scenarios for Digital Twin Implementation Based on ISO 23247

May 4, 2021
Author(s)
Guodong Shao
As a key part of digital transformation, digital twin is an important concept for achieving smart manufacturing. However, there remains a lot of confusion about the digital twin concept and how it can be implemented in real manufacturing systems

Filling the Pharmacopeial Gaps of Visual Inspection Toward Standardization and Consistency of Visible Particle Testing

May 3, 2021
Author(s)
Linda Narhi, George M. Bou-Assaf, Kristen Gonzalez, Maryam Mazaheri, Steven Messick, Srivalli Telikepalli
The presence of visible particles that are not anticipated to be present in drug products is one of the most common causes of recalls, and warning letters1, 2. This critical quality attribute, which is typically determined during visual inspection (along

Recalibration Intervals for Radiation Detection Instruments

April 2, 2021
Author(s)
Leticia Pibida, Ben Estes, Manuel Mejias, Gladys Klemic
In this work we provide a summary of the National Conference of Standards Laboratories (NCSL) Recommended Practice RP-1 calibration interval analysis method, and examples of the method applied to three sets of available NIST data (two models of radiation

A Guide to United States Cosmetic Products Compliance Requirements

March 26, 2021
Author(s)
Lisa M. Benson, Karen Reczek
This guide addresses the compliance requirements for basic cosmetics and soap. The Federal Food, Drug, and Cosmetic Act (FD&C Act) defines cosmetics as "articles intended to be rubbed, poured, sprinkled, or sprayed on, introduced into, or otherwise applied
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