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NIST Authors in Bold

Displaying 2251 - 2275 of 2915

Report on High Energy Arc Fault Experiments: Experimental Results from Medium Voltage Electrical Enclosures

November 29, 2021
Author(s)
Gabriel Taylor, Anthony D. Putorti Jr., Scott Bareham, Edward Hnetkovsky, Kenneth Hamburger, Nicholas Melly, Mark Henry Salley, Christopher U. Brown, Wai Cheong Tam, Eric Link, Michael Selepak, Philip Deardorff, Kenneth Miller, Paul Clem, Byron Demosthenous, Austin Glover, Chris LaFleur, Raymond Martinez, Anthony Tanbakuchi
This report documents an experimental program designed to investigate High Energy Arcing Fault (HEAF) phenomena for medium voltage electrical switchgear containing aluminum conductors. This report covers full-scale laboratory experiments using

Setting Kinetics of Calcium Phosphate Cement by Dielectric Spectroscopy

October 16, 2008
Author(s)
H J. Mueller, R W. Hirthe
Calcium phosphate cements (CPC) are useful because of their excellent biocompatibility and self-hardening behavior. The setting reaction involving equimolar quantities of tetracalcium phosphate (TTCP, Ca4(PO4)2O) and dicaalcium phosphate anhydrous (DCPA

Workshop on Reliability Issues in Nanomaterials

August 1, 2005
Author(s)
Robert Keller, David T. Read, Roop L. Mahajan
The Workshop on Reliability Issues in Nanomaterials was held at the Boulder Laboratories of the National Institute of Standards and Technology (NIST) on August 17-19, 2004. It was designed to promote a particular subset of NIST?s responsibilities under the

Material Needs and Measurement Challenges for Advanced Semiconductor Packaging: Understanding the Soft Side of Science

August 27, 2025
Author(s)
Ran Tao, Polette Centellas, Stian Romberg, Anthony Kotula, Gale Holmes, Amanda Forster, Christopher Soles, Bob Allen, Edvin Cetegen, William Chen, Jeff Gotro, Mark Poliks
This perspective builds upon insights from the National Institute of Standards and Technology (NIST)-organized workshop, "Materials and Metrology Needs for Advanced Semiconductor Packaging Strategies," held at the 35th annual Electronics Packaging

Neutron Vibrational Spectroscopic Study of the Acetonitrile:Acetylene (1:2) Cocrystal Relevant to Titan, Saturn's Moon

November 13, 2024
Author(s)
Morgan Kramer, Luke Daemen, Yongqiang Cheng, Rafael Balderas-Xicohtencatl, Anibal Ramirez-Cuesta, Craig Brown, Tomce Runcevski
Saturn's moon Titan features a surface composed of various organic solids with pronounced compositional and structural diversity. On top of the icy core, the surface experiences a temperature of ≈93 K and pressure of ≈1.45 atm. Under these conditions, most

On Comparing Interference Impacts

October 9, 2024
Author(s)
Aric Sanders, Michelle Pirrone, Keith Forsyth, Adam Wunderlich
Interference between communication systems is a critical issue that can impact performance and operability of devices. A wide range of methods and testbeds have been developed to study susceptibility to interference, and each of these testbeds and their

Cryogenic Sapphire Optical Reference Cavity with 1 x 10^-16 fractional instability

October 2, 2024
Author(s)
Jose Valencia, George Iskandr, Nicholas Nardelli, David Leibrandt, David Hume
The frequency stability of a laser locked to an optical reference cavity is fundamentally limited by thermal noise in the cavity length, caused by local thermal fluctuations of the strain and index of refraction of the cavity components. These fluctuations

Quality Control in the Mass Spectrometry Proteomics Core: a Practical Primer

September 11, 2024
Author(s)
Ben Neely, Yasset Perez-Riverol, Magnus Palmblad
The past decade has seen widespread advances in quality control (QC) materials and software tools focused specifically on mass spectrometry–based proteomics, yet the rate of adoption is inconsistent. Despite the fundamental importance of QC, it typically

Reproducible graphene synthesis by oxygen-free chemical vapour deposition

May 29, 2024
Author(s)
Jacob Amontree, Xingzhou Yan, Christopher DiMarco, Pierre Levesque, Tehseen Adel, Jordan Pack, Madisen Holbrook, Christian Cupo, Zhiying Wang, Dihao Sun, Adam Biacchi, Charlezetta Stokes, Kenji Watanabe, Takashi Taniguchi, Cory Dean, Angela R. Hight Walker, Katayun Barmak, Richard Martel, James Hone
The demonstration of large-scale graphene synthesis on Cu by chemical vapor deposition (CVD) has led to enormous interest worldwide over the past 14 years. The graphene CVD process involves flow of a carbon feedstock (typically methane) over a Cu surface

Solidification modes during additive manufacturing of steel revealed by high-speed X-ray diffraction

March 1, 2023
Author(s)
Hans-Henrik Konig, Niklas Hollander Pettersson, A Durga, Steven Van Petegem, Daniel Grolimund, Qilin Guo, Chihpin Chuang, lianyi Chen, Christos Oikonomou, Fan Zhang, Greta Lindwall
Solidification during fusion-based additive manufacturing (AM) is characterized by high solidification velocities and high thermal gradients, two factors that control the solidification mode of AM metals and alloys. Using two synchrotron-based, in situ

Improved interspecies optical clock comparisons through differential spectroscopy

November 28, 2022
Author(s)
May E. Kim, Will McGrew, Nicholas Nardelli, Ethan Clements, Youssef Hassan, Xiaogang Zhang, Jose Valencia, Holly Leopardi, David Hume, Tara Fortier, Andrew Ludlow, David Leibrandt
Comparisons of high-accuracy optical atomic clocks \citeLudlow2015} are essential for precision tests of fundamental physics \citeSafronova2018}, relativistic geodesy \citeMcGrew2018, Grotti2018, Delva2019}, and the anticipated redefinition of the SI

Liquid-Phase Speed of Sound and Vapor-Phase Density of Difluoromethane

September 23, 2022
Author(s)
Aaron Rowane, Elizabeth Rasmussen, Mark O. McLinden
Difluoromethane (HFC-32, DFM), with a global warming potential (GWP) of 677, is of interest as a pure refrigerant and as a component in low-GWP refrigerant mixtures. Additionally, difluoromethane has recently been identified as a safe, liquefied-gas

Heterosubstrate Illumination Effects in III-V Solar Cells

February 16, 2022
Author(s)
Brianna Conrad, Behrang Hamadani
Reference cell-based current versus voltage ( I–V ) measurements assume that the effect of an illumination spectrum on a solar cell's performance can be fully captured by the multiplication of the spectrum with the device's spectral response and subsequent

Graded Magnetic Materials

May 17, 2021
Author(s)
Lorenzo Fallarino, Brian Kirby, Eric E. Fullerton
Graded magnetic materials represent a promising new avenue in modern material science from both fundamental and application points of view. Over the course of the last few years, remarkable results have been obtained in (epitaxial) heterostructures based

New Practical Multivariate Signatures from a Nonlinear Modifier

April 1, 2021
Author(s)
Daniel Smith-Tone
Multivariate cryptography is dominated by schemes supporting various modifiers to patch certain algebraic weaknesses. Typically these modifiers are linear in nature--- either requiring an extra composition with an affine map, or being evaluated by a
Displaying 2251 - 2275 of 2915
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