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3.5 GHz Radar Waveform Capture at Fort Story

August 4, 2017

Author(s)

Paul D. Hale, Jeffrey A. Jargon, Peter J. Jeavons, Michael R. Souryal, Adam J. Wunderlich, Mark Lofquist

We describe measurements to create a library of high-fidelity waveforms of federal incumbent radar signals currently operating in the 3550 MHz 3650 MHz (3.5 GHz) band. In this second phase of assembling the library, measurements were collected at Fort

Improvements in Accelerometer Calibration at NIST Using Digital Vibrometry

April 29, 2017

Author(s)

Beverly F. Payne, Richard A. Allen, Colleen E. Hood

Improvements in shaker design and laser vibrometer development has provided more precise calibration of accelerometers. Calibrations are performed at frequencies from 1Hz to 20 kHz with improved uncertainty and improved efficiency. The vibrometer mounting

Time Resolved Size Distributions of Test Smokes and Nuisance Aerosols

February 19, 2017

Author(s)

Thomas Cleary

An electrical low-pressure impactor (ELPI) has been used to measure the size distribution of various test smokes and nuisance aerosols generated in the fire emulator/detector evaluator (FE/DE). Previously reported size results were time-averaged values

Development of Laboratory Test Methods for RF-Based Electronic Safety Equipment: Guide to the NFPA 1982 Standard

October 31, 2016

Author(s)

Audrey K. Puls, William F. Young, Kate Remley, Jacob L. Healy, Luis A. Gonzalez

The National Institute of Standards and Technology (NIST) with support from the Department of Homeland Security has been working with the National Fire Protection Association (NFPA) to develop standards and test methods for radio-frequency personal alert

Correlations for the Viscosity of 2,3,3,3-Tetrafluoroprop-1-ene (R1234yf) and trans-1,3,3,3-Tetrafluoropropene (R1234ze(E))

September 20, 2016

Author(s)

Marcia L. Huber, Marc J. Assael

Due to concerns about global warming, there is interest a class of fluids known as hydrofluoroolefins (HFOs) as potential replacements for refrigerants with high global warming potential (GWP). Two such HFOs are 2,3,3,3-Tetrafluoroprop-1-ene (R1234yf)

Report on the CCT Supplementary Comparison S1 of Infrared Spectral Normal Emittance/Emissivity

March 15, 2016

Author(s)

Leonard M. Hanssen, Boris Wilthan, Christian Monte, Joerg Hollandt, Jacques Hameury, Jean-Remy Filtz, Ferruccio Girard, Mauro Battuello, Juntaro Ishii

The National Measurement Institutes (NMIs) of the United States, Germany, France, Italy and Japan, have joined in an inter-laboratory comparison of their infrared spectral emittance scales. This action is part of a series of supplementary inter-laboratory

Proposed Congruent Matching Cells (CMC) Method for Ballistic Identifications and Evidence Searches*

June 15, 2015

Author(s)

Jun-Feng Song

The "correlation cells" and three-dimensional (3D) topography measurements have been proposed for establishment of the "NIST Ballistics Identification System (NBIS)" [1, 2]. Based on the concept of correlation cells, a "Contiguous Matching Cells (CMC)"

CURVED-WIDE PLATE TESTING OF X100 GIRTH WELDS

September 29, 2014

Author(s)

Timothy S. Weeks, Joseph D. McColskey, Mark D. Richards, Yong-Yi Wang, Marie A. Quintana

The curved-wide plate (CWP) tests are frequently used for assessing the quality of pipeline girth welds. Despite a large number of CWP tests having been conducted at great expense over many decades, an industry consensus standard remains unavailable

Measurement Methods for the Oral Uptake of Engineered Nanomaterials from Human Dietary Sources: Summary and Outlook

June 25, 2014

Author(s)

Christopher W. Szakal, Lyubov Tsytsikova, David Carlander, Timothy V. Duncan

This article is one of a series of 4 that report on a task of the NanoRelease Food Additive (NRFA) project of the International. Life Science Institute Center for Risk Science Innovation and Application. The project aims are to identify, evaluate, and

DETERMINATION OF MEAN DENSITIES, POROSITY AND THICKNESS OF BIOFILMS ATTACHED ON IRREGULAR-SHAPED MEDIA

August 10, 2011

Author(s)

Edward J. Garboczi, Meng Hu, Tian Zhang

Biofilm density, porosity, and thickness are biofilm architecture properties that are important but often difficult to measure. In this study, wet and dry biofilm densities and biofilm porosity in shredded tire biofilters were determined using conventional

Introduction to special issue on single-photon technologies

March 10, 2011

Author(s)

Alan L. Migdall, Sergey V. Polyakov, Jingyun Fan, Ivo P. Degiovanni, Jessica Cheung

This special issue accompanies the 4th international conference on single-photon technologies held at the National Institute of Standards and Technology (NIST) Boulder in November 2009. This community has met every two years at national metrology

The Thermodynamic Properties of Propane: From p-r-T to the Equation of State

September 14, 2010

Author(s)

Mark O. McLinden, Eric W. Lemmon

The p-ρ-T behavior of high-purity (99.999%) propane was measured from 265 K to 500 K with pressures to 36 Mpa using a two-sinker densimeter. The measurements extend from low-density vapor to compressed liquid states, and the near-critical region was

Thermodynamic Properties of Propane. I. p-r-T Behavior from 265 to 500 K with Pressures to 36 MPa

November 23, 2009

Author(s)

Mark O. McLinden

The p-ρ-T behavior of high-purity (99.999%) propane was measusred from 265 K to 500 K with pressures to 36 MPa with a two-sinker densimeter. The measurements extend from low-density vapor to compressed liquid states, and the extended critical region was

Indoor Localization: Technology That Can Save First Responder Lives

December 1, 2007

Author(s)

Nader Moayeri, Camillo A. Gentile, Kamran Sayrafian, Michael R. Souryal

Every year a number of first responders lose their lives while battling fires or rescuing civilians during such emergencies. Indoor localization or location tracking roughly provides the same capability inside buildings that GPS does outdoors. It allows a

Impedance Measurements of Inertance Tubes at High Frequency and Pressure

July 16, 2007

Author(s)

Michael A. Lewis, Ryan P. Taylor, Peter E. Bradley, Ray Radebaugh, Gershon Grossman, Zhihua Gan

Previous comparisons between measured and calculated inertance tube impedance were made at frequencies below 70 Hz and average pressures below 3 MPa. In this paper, we present results on similar comparisons for frequencies up to 150 Hz and average

Report on the 4th Annual NIST Polymer Mass Spectrometry Workshop: Future Directions in Soft Ionization of Polymers

January 10, 2006

Author(s)

William E. Wallace

This year s annual workshop on polymer mass spectrometry was on the topic of Future Directions in Soft Ionization of Polymers . The workshop was sponsored by the Polymers Division of the National Institute of Standards and Technology (NIST) and follows

Correction of Stray Light in Spectrographs: Implications for Remote Sensing

August 22, 2005

Author(s)

Yuqin Zong, Steven W. Brown, Bettye C. Johnson, Keith R. Lykke, Yoshihiro Ohno

Spectrographs are used in a variety of applications in the field of remote sensing for radiometric measurements due to the benefits of measurement speed, sensitivity, and portability. However, spectrographs are single grating instruments that are

Estimates of Thermal Properties for Fire Fighters' Protective Clothing Materials

June 1, 2005

Author(s)

James R. Lawson, William D. Walton

A series of measurements has been carried out to quantify the thermal properties of materials used to fabricate fire fighters' thermal protective clothing. The thermal property measurements chosen have direct application for use in heat transfer

Measurement of Particle Size Distribution in Portland Cement Powder: Analysis of ASTM Round-Robin Studies

November 1, 2004

Author(s)

Chiara F. Ferraris, Vincent A. Hackley, A Aviles

A distribution of particle sizes or particle size distribution (PSD) is a fundamental characteristic of cement powder. Accurate PSDs are required in computational efforts to model the hydration process and it is an important practical issue for the cement

Standard for a Precision Clock Synchronization Protocol for Networked Measurement and Control Systems

September 27, 2004

Author(s)

Kang B. Lee, J Eldson

The 2004 Conference on IEEE 1588, Standard for a Precision clock Synchronization Protocol for Networked Measurement and control Systems was hosted by NIST on September 27-29, and was co-sponsored with the IEEE Instrumentation and Measurement Society. More

Program: 2004 Boulder Laboratories Postdoctoral Poster Symposium

July 15, 2004

Author(s)

Joe W. Magee

In honor of both the Boulder Labs 50 Year Anniversary and 50 years of the NIST/National Research Council Postdoctoral Associateship Program, we will hold the First Boulder Labs Postdoctoral Poster Symposium on Thursday, June 24, 2004, from 2 to 4 p.m. in

Hard X-Ray Emission From Laser-Produced Plasmas of U and Pb Recorded by a Transmission Crystal Spectrometer

September 1, 2003

Author(s)

J Seely, R Doron, A Bar-Shalom, Lawrence T. Hudson, C Stoeckl

Hard X-ray spectra from laser-produced plasmas were recorded by a transmission crystal survey spectrometer covering the 12 keV to 60 keV energy range with a resolving power of F/δEnearly equal to}100. This emission is of interest for the development of

Rapid Deformation of Thin Gold Layers in Polymer Matrices Studied by X-Ray Reflectivity

August 1, 2003

Author(s)

K Shin, H Wang, Sushil K. Satija, Charles C. Han, Daniel Josell, John E. Bonevich

We have used X-ray reflectivity to measure the morphological profiles of thin Au layers of three different average thicknesses sandwiched between two polystyrene layers with different molecular weights, Mw = 52.3k and Mw - 168.5k. The results showed that

An Investigation of the Applicability of Design of Experiments to Software Testing

December 6, 2002

Author(s)

David R. Kuhn, Michael J. Reilly

Approaches to software testing based on methods from the field of design of experiments have been advocated as a means of providing high coverage at relatively low cost. Tools to generate all pairs, or higher n-degree combinations, of input values have

Molecular Orientation and Grafting Density in Semifluorinated Self-Assembled Monolayers of Mono-, Di- and Trichloro Silanes on Silica Substrates

November 1, 2002

Author(s)

Jan Genzer, K Efimenko, Daniel A. Fischer

We study the molecular orientation in semifluorinated (F 3C(CF 2) 8(CH 2) 2-, F8H2) self-assembled monolayers (SAMs) prepared by vapor deposition of mono- (m-F8H2), di- (d-F8H2) and trichloro (t-F8H2) organosilanes on flat silica-covered substrates. Near

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