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Journal of Research (NIST JRES)

Primary Determination of Particle Number Concentration with Light Obscuration and Dynamic Imaging Particle Counters

January 11, 2018

Author(s)

Dean C. Ripple, Paul C. DeRose

Accurate number concentrations of particles in liquid media are needed to assess the quality of water, pharmaceuticals, and other liquids, yet there are limited...

Transient Thermal Response of a Guarded-Hot-Plate Apparatus for Operation Over an Extended Temperature Range

January 8, 2018

Author(s)

Robert R. Zarr, William C. Thomas

A mathematical model is presented for a new-generation guarded-hot-plate apparatus to measure the thermal conductivity of insulation materials. This apparatus...

The NIST Johnson noise thermometry system for the determination of the Boltzmann constant

December 29, 2017

Author(s)

Nathan Flowers-Jacobs, Alessio Pollarolo, Kevin Coakley, Adam C. Weis, Anna Fox, Horst Rogalla, Weston L. Tew, Samuel Benz

In preparation for the redefinition of the International System of Units (SI), five different electronic measurements of the Boltzmann constant have been...

Natural Uranium Radioactivity Solution Standard: SRM 4321d

December 27, 2017

Author(s)

Ronald Colle, Lizbeth Laureano-Perez, Svetlana Nour, Jerome J. LaRosa, Brian E. Zimmerman, Leticia S. Pibida, Denis E. Bergeron

A new natural uranium solution standard has been produced and will be disseminated by the National Institute of Standards and Technology (NIST) as Standard...

Design, Construction, and Calibration of a Temperature Monitoring System for Resistance Standards

December 18, 2017

Author(s)

Dean G. Jarrett, Daniel Paseltiner, Shamith U. Payagala

We present the design, construction, calibration, and software development of a temperature monitoring system for resistance standards. The system supports 19...

Polar Codes for Quantum Key Distribution

December 14, 2017

Author(s)

Anastase Nakassis

This paper addresses the performance of polar codes in the context of the quantum key distribution (QKD) protocol. It introduces the notion of an interactive...

Review: Coefficients for Stress, Temperature, and Composition Effects in Fluorescence Measurements of Alumina

December 13, 2017

Author(s)

Robert F. Cook, Chris A. Michaels

The numerical coefficients linearly relating the effects of stress (including pressure), temperature, and composition to shifts in the energies of the Cr...

Accuracy of Approximations to the Poynting Correction for Ice and Liquid Water

November 20, 2017

Author(s)

Allan H. Harvey

Rigorous calculation of the Poynting correction, which describes the effect of pressure on the fugacity of a condensed phase, requires time-consuming evaluation...

Performance Data from the NIST Photovoltaic (PV) Arrays and Weather Station

November 1, 2017

Author(s)

Matthew Boyd

MCMLpar and MCSLinv: A Parallel Version of MCML and an Inverse Monte Carlo Algorithm to Calculate Optical Scattering Parameters

October 20, 2017

Author(s)

Richelle H. Streater, Anne-Michelle R. Lieberson, Adam L. Pintar, Zachary H. Levine

The MCML program for Monte Carlo modeling of light transport in multi-layered tissues has been widely used in the past 20 years or so. Here, we have re...

Likelihood Ratio as Weight of Forensic Evidence: A Closer Look

October 12, 2017

Author(s)

Hariharan K. Iyer, Steven P. Lund

The forensic science community has increasingly sought quantitative methods for conveying the weight of evidence. Experts from many forensic laboratories...

mumpce_py: A Python implementation of the Method of Uncertainty Minimization using Polynomial Chaos Expansions

October 4, 2017

Author(s)

David A. Sheen

The Method of Uncertainty Minimization using Polynomial Chaos Expansions (MUM-PCE) was developed as a software tool to constrain physical models against...

Comparison of One-Dimensional and Volumetric Computed Tomography Measurements of Injected-Water Phantoms

September 20, 2017

Author(s)

Zachary H. Levine, Huaiyu H. Chen-Mayer, Adele P. Peskin, Adam L. Pintar

The goal of this study was to compare volumetric analysis in computed tomography (CT) with the length measurement prescribed by the Response Evaluation Criteria...

NanoUV-VIS: an interactive visualization tool for monitoring the evolution of optical properties of nanoparticles throughout synthesis reactions

September 20, 2017

Author(s)

Bryan Calderon Jimenez, Gabriel Sarmanho, Karen E. Murphy, Antonio R. Montoro Bustos, Jose R. Vega Baudrit

Engineered nanoparticles (NPs) are being used for a broad array of high technology applications including sensing, imaging, targeted drug delivery, bio...

Method for Measuring the Phase Spectrum of the Output of a Frequency Source Used in the Calibration of an Electroshock Weapon Characterization System

September 19, 2017

Author(s)

Nicholas G. Paulter Jr.

Electroshock weapons (ESWs) output a transient burst of impulse-like high-voltage electrical signals that can incapacitate a human target. To ensure safe and...

Gravity-based characterization of three-axis MEMS-accelerometers in terms of intrinsic accelerometer parameters

July 13, 2017

Author(s)

Jon C. Geist, Muhammad Y. Afridi, Craig McGray, Michael Gaitan

Cross-sensitivity matrices are used to translate the response of three-axis accelerometers into components of acceleration along the axes of a specified...

Development of NIST Standard Reference Material 2082, a Pathlength Standard for Measurements in the Ultraviolet Spectrum

July 10, 2017

Author(s)

Brian Lang, Aaron A. Urbas, Paul C. DeRose, Hung-Kung Liu, John C. Travis, Steven J. Choquette, Kenneth D. Cole

New spectrophotometers and cuvettes have been designed to allow the measurement of absorbance values from samples using microliter volume sizes. These...

Immersion coefficient for the Marine Optical BuoY (MOBY) radiance collectors

June 28, 2017

Author(s)

Michael Feinholz, B. Carol Johnson, Kenneth Voss, Mark A. Yarbrough, Stephanie J. Flora

The immersion coefficient accounts for the difference in calibration for a radiometer placed in the air versus water or another medium. The immersion...

Software for complete mode structure analysis of a light field

June 26, 2017

Author(s)

Ivan A. Burenkov, Sergey V. Polyakov

We present a software package aimed at simulating photon-number probability distributions of a range of naturally occurring classical and non-classical states...

Partial Ionization Cross Sections of Organic Molecules

June 13, 2017

Author(s)

Karl K. Irikura

Partial ionization cross sections are the absolute yields of specific ions from an electron- molecule collision. They are necessary for modeling plasmas and for...

Classification of Scientific Journal Articles for the NIST Thermodynamics Research Center

June 7, 2017

Author(s)

Alden A. Dima, Kenneth G. Kroenlein, Sharief S. Youssef, Yuanyuan Feng

The goal of this work is to explore the feasibility of using open-source-based document classification techniques using features generated via topic modeling on...

Reference Data Set of Human Skin Reflectance

June 7, 2017

Author(s)

Catherine C. Cooksey, David W. Allen, Benjamin K. Tsai

This data set contains 100 reference reflectance spectra of human skin, spanning the wavelength region from 250 nm to 2500 nm. The spectra were acquired with a...

A Historical Review of U. S. Contributions to the Atomic Definition of the SI Second

June 1, 2017

Author(s)

Michael A. Lombardi

Before atomic clocks, the second was defined by dividing astronomical events, such as the solar day or the tropical year, into smaller parts. This permanently...

A Sampling-Agnostic Software Framework for Converting Between Texture Map Representations of Virtual Environments

May 18, 2017

Author(s)

Vinay Sriram, Wesley N. Griffin

We have developed a utility to both stitch cube maps into other types of texture maps (equirectangular, dual paraboloid, and octahedral), and stitch the other...

The Lattice Spacing Variability of Intrinsic Float-Zone Silicon

May 11, 2017

Author(s)

Ernest G. Kessler Jr., Csilla Szabo-Foster, James Cline, Albert Henins, Lawrence T. Hudson, Marcus Mendenhall, Mark D. Vaudin

Precision lattice spacing comparison measurements at the National Institute of Standards and Technology (NIST) provide traceability of x-ray wavelength and...

Mass spectra of sulfonephthalein pH indicator dyes and their impurities

April 26, 2017

Author(s)

Regina A. Easley, Benjamin J. Place

IFC File Analyzer Software

March 30, 2017

Author(s)

Robert R. Lipman

The IFC File Analyzer software generates a spreadsheet or CSV files from an IFC file. IFC (Industry Foundation Classes) is the data exchange standard used to...

STEP File Analyzer Software

March 30, 2017

Author(s)

Robert R. Lipman

The STEP File Analyzer is a software tool that generates a spreadsheet or CSV files from a STEP (ISO 10303 STandard for Exchange of Product model data) Part 21...

Phase Uncertainty in Digital Holographic Microscopy Measurements in the Presence of Solution Flow Conditions

March 27, 2017

Author(s)

Alexander Brand

Digital holographic microscopy (DHM) is a surface topography measurement technique with reported sub- nanometer vertical resolution. While made commercially...

Impact Toughness Modification of NIST Low-Energy Charpy Verification Specimens for Testing at Room Temperature

March 27, 2017

Author(s)

Enrico Lucon, Raymond L. Santoyo

The possibility for NIST to certify Charpy reference specimens for testing at room temperature (21 °C ± 1 °C) instead of −40 °C has been investigated in a...

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