Journal of Research (NIST JRES)

A Purely Algebraic Justification of the Kabsch-Umeyama Algorithm

October 09, 2019

Author(s):

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

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

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

October 02, 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...

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 D. 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 D. 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 02, 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...

Journal of Research (NIST JRES)

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