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Journal of Research (NIST JRES)

Shock Measurements Based on Pendulum Excitation and Laser Doppler Velocimetry: Primary Calibration by SI-Traceable Distance Measurements

April 10, 2020

Author(s)

Muhammad Afridi, Jon Geist, Michael Gaitan

A new method is described to provide a primary calibration of shock measurements produced by a shock measurement system consisting of pendulum excitation and

Design Considerations to Improve Charpy Instrumented Strikers

March 16, 2020

Author(s)

Nicholas Vlajic, Akobuije Chijioke, Enrico Lucon

Instrumented impact testing allows the applicability of conventional Charpy tests to be extended toward assessing mechanical properties such as dynamic fracture

The Statistics of Computer Clocks and the Design of Synchronization Algorithms

February 25, 2020

Author(s)

Judah Levine

In this study, I used standard statistical tools (such as the various forms of the two-sample Allan variance) to characterize the clocks in computers, and I

So, You Want to Have a Nanofab? SharedUse Nanofabrication and Characterization Facilities: Cost-of-Ownership, Toolset, Utilization, and Lessons Learned

February 21, 2020

Author(s)

James A. Liddle, Jerry L. Bowser, Bojan Ilic, Vincent K. Luciani

Nanofabrication/characterization facilities enable research and development activities across a host of science and engineering disciplines. The collection of

Performance of Test Supermartingale Confidence Intervals for the Success Probability of Bernoulli Trials

February 5, 2020

Author(s)

Peter Wills, Emanuel Knill, Kevin Coakley, Yanbao Zhang

Given a composite null hypothesis H0, test supermartingales are non-negative supermartingales with respect to H0 with an initial value of 1. Large values of

Hylleraas-configuration-interaction non-relativistic energies for the 3 singlet S, 4 singlet S, 5 singlet S, 6 singlet S, and 7 singlet S excited states of the beryllium atom

February 5, 2020

Author(s)

James S. Sims

In a previous work Sims and Hagstrom [J. Chem. Phys. 140,224312 (2014)] reported Hylleraas- configuration-interaction (Hy-CI) method variational calculations

Digitizing "The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI Units"

February 4, 2020

Author(s)

Janiel J. Reed

The NBS Tables of Chemical Thermodynamic Properties is a collection of thermodynamic properties, published in book form, consisting of 103 tables with 14 330

Thermography of the Metal Bridge Structures Fabricated for the 2018 Additive Manufacturing Benchmark Test Series (AM-Bench 2018)

January 30, 2020

Author(s)

Jarred C. Heigel, Brandon M. Lane, Lyle Levine, Thien Q. Phan, Justin G. Whiting

This document provides details on the files available for download in the data set "In situ thermography of the metal bridge structures fabricated for the 2018

NIST Ballistics Toolmark Research Database

January 27, 2020

Author(s)

Xiaoyu Alan Zheng, Johannes A. Soons, Robert M. Thompson, Sushama P. Singh, Cerasela Constantin

In 2009, a report by the National Academies called into question, amongst other issues, the objectivity of visual toolmark identification by firearms examiners

Optical quantum memory and its applications in quantum communication systems

January 16, 2020

Author(s)

Lijun Ma, Xiao Tang, Oliver T. Slattery

Optical quantum memory is a device that can store the quantum state of photons and retrieve it with high fidelity on demand. The device can be used to enhance

Laboratory Information Management Systems for Electron Microscopy: Evaluation of the 4CeeD Data Curation Platform

December 17, 2019

Author(s)

June W. Lau, Rachel F. Devers, Marcus W. Newrock, Gretchen R. Greene

An evaluation of the feasibility and the requirements associated with a facility-wide deployment of a Laboratory Information Management Systems (LIMS) at an

RF Dataset of Incumbent Radar Signals in the 3.5 GHz CBRS Band

December 17, 2019

Author(s)

Raied Caromi, Michael R. Souryal, Timothy Hall

This Radio Frequency (RF) dataset consists of synthetically generated waveforms of incumbent 3.5 GHz radar systems. The intended use of the dataset is for

Practical Guide to the Design, Fabrication and Calibration of NIST Nanocalorimeters

December 16, 2019

Author(s)

Feng Yi, Michael D. Grapes, David A. LaVan

We report here on the design, fabrication and calibration of nanocalorimeter sensors used in the NIST Nanocalorimetry Measurements Project. These small scale

Forced Edges and Graph Structure

November 19, 2019

Author(s)

Brian D. Cloteaux

For a degree sequence, its set of forced edges are the edges that appear in every realization of that sequence, while its forbidden edges appear in no

Process Monitoring Dataset from the Additive Manufacturing Metrology Testbed (AMMT): "Three-Dimensional Scan Strategies"

November 19, 2019

Author(s)

Brandon M. Lane, Ho Yeung

This document provides details on the files available in the dataset "20180708-HY-3D Scan Strategies" pertaining to a 3D additive manufacturing build performed

Influence of Isotopologue Dipole Moments on Precision Dielectric-Constant Measurements

November 4, 2019

Author(s)

Allan H. Harvey

Measurements of the relative permittivity (dielectric constant) of fluids such as methane have been interpreted with the assumption that the substance has zero

Optical-Fiber Power Meter Comparison between NIST and LAMETRO

November 1, 2019

Author(s)

Johnny Jimenez, Maria Ugalde, John H. Lehman, Igor Vayshenker

We describe the results of a comparison of reference standards between the National Institute of Standards and Technology (NIST-USA) and Laboratorio de

A Purely Algebraic Justification of the Kabsch-Umeyama Algorithm

October 9, 2019

Author(s)

James F. Lawrence, Javier Bernal, Christoph J. Witzgall

The constrained orthogonal Procrustes problem is the least-squares problem that calls for a rotation matrix that optimally aligns two matrices of the same order

The use of correlated binomial distribution in estimating error rates for firearm evidence identification

October 2, 2019

Author(s)

Nien F. Zhang

In forensic science on firearm evidence identification, estimating error rates is a fundamental challeng. Recently, a quantitative approach known as the

A Century of WWV: 100th Anniversary Commemoration

September 24, 2019

Author(s)

Glenn K. Nelson

WWV was established as a radio station on October 1, 1919 with the issuance of the call letters by the U.S. Department of Commerce. This paper will observe the

Variation of Surface Topography in Laser Powder Bed Fusion Additive Manufacturing of Nickel Super Alloy 625

September 10, 2019

Author(s)

Jason C. Fox

This document provides details on the files available for download in the dataset "Variation of Surface Texture in Laser Powder Bed Fusion of Nickel Super Alloy

Stress measurements in alumina by optical fluorescence: revisited

August 27, 2019

Author(s)

Robert F. Cook, Chris A. Michaels

Stress measurements in single crystal and polycrystalline alumina are revisited using a recently-developed optical fluorescence energy shift method. The method

Background and Review of Cavity-Enhanced Spontaneous Parametric Down-Conversion

August 22, 2019

Author(s)

Oliver T. Slattery, Lijun Ma, Kevin Zong, Xiao Tang

Spontaneous parametric down-conversion (SPDC) in a nonlinear crystal has been a workhorse for the generation of entangled and correlated single-photon pairs

X-ray computed tomography instrument performance evaluation, Part II: Sensitivity to rotation stage errors

July 11, 2019

Author(s)

Balasubramanian Muralikrishnan, Katharine M. Shilling, Steven D. Phillips, Wei Ren, Vincent Lee, Felix H. Kim

The development of standards for evaluating the performance of X-ray computed tomography instruments is ongoing within ASME and ISO working committees. A key

X-ray computed tomography instrument performance evaluation, Part I: Sensitivity to detector geometry errors

July 11, 2019

Author(s)

Balasubramanian Muralikrishnan, Katharine M. Shilling, Steven D. Phillips, Wei Ren, Vincent Lee, Felix H. Kim

X-ray computed tomography (XCT), long used in medical imaging and defect inspection, is now increasingly used for dimensional measurements of geometrical

Translator from Extended SysML to Physical Interaction and Signal Flow Simulation Platforms

July 2, 2019

Author(s)

Raphael Barbau, Conrad E. Bock, Mehdi Dadfarnia

Designing complex systems often requires engineers from multiple disciplines (mechanical, electrical, production, and so on) to communicate with each other and

pyMCR: A Python Library for Multivariate Curve Resolution Analysis

June 24, 2019

Author(s)

Charles H. Camp

In this work, a new software library is presented for performing multivariate curve resolution (MCR)analysis, a chemometric method for elucidating signatures of

Detailed Derivations of Formulae for Heat Release Rate Calculations Revisited: A Pedagogical and Systematic Approach

June 24, 2019

Author(s)

Jiann C. Yang

We revisit the derivations of the formulae for heat release rate calculations based on the oxygen consumption principle. We use a systematic, structured, and

pyLLE: a Fast and User Friendly Lugiato-Lefever Equation Solver

May 24, 2019

Author(s)

Gregory T. Moille, Qing Li, Xiyuan Lu, Kartik Srinivasan

The Lugiato-Lefever Equation (LLE), first developed to provide a description of spatial dissipative structures in optical systems, has recently made a

Scatter corrections in x-ray computed tomography: a physics-based analysis

May 22, 2019

Author(s)

Zachary H. Levine, Timothy Blattner, Adele Peskin, Adam L. Pintar

Fundamental limits for the calculation of scattering corrections within X-ray computed tomography (CT) are found within the independent atom approximation from