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NIST Authors in Bold

Displaying 1 - 25 of 2668

Insights on grain refinement of Al-Mn-Fe-Si alloy via in situ reaction during laser direct energy deposition

February 2, 2025
Author(s)
Qingyu Pan, Fan Zhang, Deepak Vikraman Pillai, Zilong Zhang, Yufeng Zheng, Lang Yuan, Monica Kapoor, John Carsley, Xiaoyuan Lou
In the present work, we studied the grain refinement by adding in situ reactants, pure titanium (Ti) or a combination of Ti and boron (B), and investigated the governing mechanism in Al-Mn-Fe-Si 3104 alloy made by laser direct energy deposition (DED)

Scattering Insights into Shear-Induced Scission of Rodlike Micelles

January 23, 2025
Author(s)
Guan-Rong Huang, Ryan Murphy, Lionel Porcar, Chi-Huan Tung, Changwoo Do, Wei-Ren Chen
Studying the scission of rodlike micelles under mechanical forces is essential for understanding their stability and behavior in industrial applications. Mechanical stress can fragment these micelles, impacting performance. Investigating this process

2024 NIST Summary of U.S. Legal Metrology Activities

January 10, 2025
Author(s)
Juana Williams, John McGuire, Loren Minnich, Gloria Lee, Jan Konijnenburg, Isabel Baucom, Katrice Lippa
The NIST Office of Weights and Measures (OWM) presents its second issue of the 2024 NIST Annual Summary of U.S. Legal Metrology Activities report. This report includes a summary of changes made to NIST Handbook 44 (2024) Specifications, Tolerances and

Checking the Net Contents of Packaged Goods

January 10, 2025
Author(s)
John McGuire, David Sefcik, Loren Minnich, Isabel Baucom, Katrice Lippa
This handbook has been prepared as a procedural guide for the compliance testing of net content statements on packaged goods. Compliance testing of packaged goods is the determination of the conformance results of packaging, distribution, and sale of

Uniform Laws and Regulations in the Areas of Legal Metrology and Fuel Quality

January 10, 2025
Author(s)
John McGuire, David Sefcik, Loren Minnich, Isabel Baucom, Katrice Lippa
This 2025 edition includes amendments made through the Committee on Laws and Regulations of the NCWM with technical guidance from the Office of Weights and Measures (OWM) of the NIST and input from weights and measures officials and industry

Methods to evaluate 3D lidars used for automated driving

January 1, 2025
Author(s)
Prem Rachakonda, Abhilash Mane, Craig I. Schlenoff, Kamel S. Saidi
Evaluating perception sensor systems for on-road autonomous vehicles is still fraught with ambiguity due to the varying and dynamic environmental factors that these vehicles encounter. The critical safety of on-road AV operations is heavily dependent on

CCQM_Retrospectoscope Reference Manual: A detailed reference to the CCQM_Retrospectoscope, a suite of graphical tools for the meta-analysis of measurement results from CCQM studies

December 12, 2024
Author(s)
David L. Duewer, Christina Cecelski, Michael Nelson
This document is a detailed reference manual for the 1-September-2024 version of the CCQM_Retrospectoscope system. The CCQM_Retrospectoscope combines a nominally complete database of results from Consultative Committee for the Amount of Substance

Characterizing interconnects to 325 GHz

November 20, 2024
Author(s)
Nicholas Jungwirth, Bryan Bosworth, Meagan Papac, Aaron Hagerstrom, Eric Marksz, Jerome Cheron, Angela Stelson, Florian Bergmann, Ari Feldman, Dylan Williams, Christian Long, Nathan Orloff
We developed an interconnect characterization procedure that first embeds the interconnect into the error boxes of a multiline thru-reflect-line calibration and subsequently de-embeds the interconnect with a multi-tiered calibration. We experimentally

Measuring social consensus

November 18, 2024
Author(s)
David W. Flater
Many organizations describe their processes as consensus-driven, but there is no consensus on the definition of consensus. Qualitative definitions of consensus prioritize social phenomena like "unity" that are not necessarily measurable. Quantitative

Certification of Standard Reference Material(R) 1641f Mercury in Water

November 14, 2024
Author(s)
Colleen Bryan Sallee, Therese Butler, Jenna Klingsick, John Molloy, James Yen
Standard Reference Material (SRM) 1641f Mercury in Water is intended for the calibration of instruments and techniques used for the determination of mercury in natural waters. It is designed for the preparation of calibration solutions and for use as a

Ultraviolet to Short-Wave Infrared Spectral Reflectance

October 28, 2024
Author(s)
Heather Patrick, Clarence Zarobila
The National Institute of Standards and Technology performs calibrations of spectral reflectance measurements in the ultraviolet (UV) to short-wave infrared (SWIR) spectral regions using the Robotic Optical Scattering Instrument (ROSI) and its associated

Compact Homodyne Extrapolation System (CHEXS)

October 27, 2024
Author(s)
Joshua Gordon, Benjamin Moser
We present on a novel gain extrapolation antenna range, the Compact Homodyne Extrapolation System (CHEXS), that can achieve absolute antenna gain measurements with uncertainties of 0.1 dB or better with as few at 10 data points and is significantly more

Speed of Sound for Understanding Metals in Extreme Environments

October 7, 2024
Author(s)
Elizabeth Rasmussen, Boris Wilthan
Knowing material behavior is crucial to successful design, especially given the growing number of next-generation energy, defense, and manufacturing systems operating in extreme environments. Specific applications for materials in extreme environments

Terahertz On-wafer mTRL Calibration Kits For Microelectronics Characterization

October 7, 2024
Author(s)
Jerome Cheron, Robert Jones, Bryan Bosworth, Jeffrey Jargon, Benjamin Jamroz, Ari Feldman
We report accurate small-signal measurements of heterojunction-bipolar-transistors (HBTs) that are characterized with two on-wafer multiline thru-reflect-line (mTRL) calibration kits. The first calibration kit is designed with thin-film microstrip

A digital four-arm bridge for the comparison of resistance with capacitance

September 11, 2024
Author(s)
Yicheng Wang, Stephan Schlamminger
A digital four-arm bridge for the comparison of resistance with capacitance has been designed and demonstrated. The digital bridge mimics the classical quad bridge in the digital domain with three balances: the source balance, the detector balance, as well

Complex Precipitation Behavior in a Co-free High Entropy Alloy during Aging

September 11, 2024
Author(s)
Matthew Luebbe, Fan Zhang, Jonathan Poplawsky, Jiaqi Duan, Haiming Wen
High entropy alloys (HEAs) demonstrate high strength, thermal stability, and irradiation resistance, making them desirable for applications in nuclear reactors and other harsh environments. Many existing HEAs contain cobalt (Co), which makes them
Displaying 1 - 25 of 2668