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NIST Authors in Bold

Displaying 251 - 275 of 2957

Fundamental Physics with a State-of-the-Art Optical Clock in Space

December 23, 2021
Author(s)
Andrei Derevianko, Kurt Gibble, Leo Hollberg, Nathan R. Newbury, Chris Oates, Laura Sinclair, Nan Yu
… new possibilities in precision metrology for both tests of fundamental physics and timing applications. Here we describe … enhanced searches for dark matter and drifts in fundamental constants, and establishing a high accuracy … Fundamental Physics with a State-of-the-Art Optical Clock in …

EDS Microanalysis: Pushing the Limits

June 1, 2018
Author(s)
Nicholas Ritchie, Dale E. Newbury, Michael Mengason, Heather Lowers
… of natural rare-earth element bearing minerals and nickel silicides. … Wavelength Dispersive Spectrometry, Rare earth elements, Nickel silicides …

Fundamental Equation of State for Deuterium

February 27, 2014
Author(s)
Ian A. Richardson, Jacob W. Leachman, Eric Lemmon
… energy machines such as ITER and NIF. We present a new fundamental equation of state for the thermodynamic … Fundamental Equation of State for Deuterium …

Laboratory Experiments for Fundamental Physics in Space

October 16, 2008
Author(s)
William D. Phillips
… is to highlight a number of opportunities for addressing fundamental physics questions through such experiments. I do … Laboratory Experiments for Fundamental Physics in Space …

The Electronic Kilogram

May 1, 2001
Author(s)
Michael H. Kelley
The kilogram is the only remaining base unit in the International System of Units (SI) whose definition is based on a single physical artifact rather than on fundamental properties of nature. Effects such as environmental contamination or material loss

Prediction of Solidification Phases in Cr-Ni Stainless Steel Alloys Manufactured by Laser Based Powder Bed Fusion Process

March 1, 2018
Author(s)
Gregor Jacob
… The knowledge of material phases in chromium (Cr), nickel (Ni) stainless steel alloys is sometimes important … the calculation of the ration between the chromium and nickel equivalent and inscribe these values into the phase … of austenitic. Inscribing these values of the chromium and nickel equivalent into the Schaeffler and DeLong diagram …

Radioactive Particle Analysis by Digital Autoradiography

May 1, 2001
Author(s)
Cynthia J. Zeissler, Richard M. Lindstrom, J P. McKinley
We have been exploring ways to evaluate the activity of radioactive particles that have been detected by phosphor plate digital autoradiography based on photostimulated luminescence (PSL). A PSL system with 25υ pixel digitization has been applied to

Speed-of-Sound Measurements and a Fundamental Equation of State for Propylene Glycol

June 9, 2021
Author(s)
Eisenbach Tim, Christian Scholz, Roland Span, Diego Cristancho, Monika Thol, Eric W. Lemmon
… A fundamental equation of state was developed for propylene … independent variables temperature and density. Due to its fundamental nature, it can be used to calculate all … Speed-of-Sound Measurements and a Fundamental Equation of State for Propylene Glycol …

Status of NIST Thermal Insulation Reference Materials

September 1, 2008
Author(s)
Robert R. Zarr
The current status of thermal insulation reference materials at the National Institute of Standards and Technology (NIST) is presented. This paper describes an ongoing thermal insulation measurement program that provides the public with Calibrated Transfer

Synthesis and Characterization of Bulk Nd 1-x Sr x NiO 2 and Nd 1-x Sr x NiO 3

August 21, 2020
Author(s)
Bi-Xia Wang, Hong Zheng, E. Krivyakina, Omar Chmaissem, Pietro Papa Lopes, Jeffrey W. Lynn, Leighanne C. Gallington, Y. Ren, S. Rosenkranz, J. F. Mitchell, D. Phelan
The recent reports of superconductivity in Nd 1-xSr xNiO 2/SrTiO 3 heterostructures have reinvigorated interest in potential superconductivity of low-valence nickelates. Synthesis of Ni 1+ -containing compounds is notoriously difficult. In the current work

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 … CURVED-WIDE PLATE TESTING OF X100 GIRTH WELDS …

Advanced Tests of Fundamental Physics with State-of-the-Art Optical Clocks/Two-Way Time Links in Space

December 23, 2021
Author(s)
Chris Oates, Nathan R. Newbury, Laura Sinclair, Leo Hollberg, Andrei Derevianko, Marianna Safronova, Nan Yu, Kurt Gibble
… new possibilities in precision metrology for both tests of fundamental physics and timing applications. Space offers … As a result, space borne optical clock tests of fundamental physics could achieve sensitivities four (or … beyond those of current tests of relativity. Additional fundamental test opportunities include enhanced searches for …

Assessing the Measurement Uncertainty of Thermophysical Properties

September 2, 2009
Author(s)
Robert R. Zarr
A generalized approach for the expression of measurement uncertainty consistent with current international practice is presented. The approach is applicable to all kinds of quantitative measurements including measurements of thermophysical properties. A
Displaying 251 - 275 of 2957
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