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Search Publications

NIST Authors in Bold

Displaying 1076 - 1100 of 73697

Electric-Field Manipulation of Magnetic Chirality in a Homo-Ferro-Rotational Helimagnet

September 4, 2024
Author(s)
Junjie Yang, Masaaki Matsuda, Trevor Tyson, Joshua Young, William Ratcliff, Yunpeng Gao, Dimuthu Obeysekera, Xiaoyu Guo, Rachel Owen, Liuyan Zhao, Sang-Wook Cheong
Ferro-rotational (FR) materials, renowned for their distinctive material functionalities, present challenges in the growth of homo-FR crystals (i.e., single FR domain). This study explores a cost-effective approach to growing homo-FR helimagnetic RbFe(SO4

Traceable RF Power Metering Procedures With Thermoelectric Sensors

September 4, 2024
Author(s)
Zenn Roberts, Aaron Hagerstrom, Cole Gray, Angela Stelson, Vincent Neylon, Christian Long
The National Institute of Standards and Technology (NIST) maintains the United State's primary standards for traceable RF and mm-wave power measurements. These measurements require special sensors that carry no active electronics, and that have operating

Using Commercial Source Measure Units for Traceable RF Power Measurements

September 4, 2024
Author(s)
Cole Gray, Aaron Hagerstrom, Zenn Roberts, Christian Long
Abstract—As a National Metrology Institute (NMI), the National Institute of Standards and Technology (NIST) maintains traceable measurement capabilities for a variety of quantities, including microwave power. At NMIs and calibration laboratories, traceable

Current State and Emerging Trends in Advanced Manufacturing: Part 2 - Smart Systems and Future Challenges

September 3, 2024
Author(s)
Kamyar Raoufi, Karl Haapala, John Sutherland, Fu Zhao, Andres Clarens, Jeremy Rickli, Zhaoyan Fan, Haihong Huang, Yue Wang, WoJae Lee, Nehika Mathur, Matthew Triebe, Sai Srinivas Desabathina
Advanced manufacturing is challenging engineering perceptions of how to innovate and compete. The need for manufacturers to rapidly respond to changing requirements and demands; obtain, store, and interpret large volumes of data and information; and

High-throughput DNA engineering by mating bacteria

September 3, 2024
Author(s)
Takeshi Matsui, Po-Hsiang Hung, Han Mei, Xianan Liu, Fangfei Li, John Collins, Weiyi Li, Darach Miller, Neil Wilson, Esteban Toro, Geoffrey Taghon, Gavin Sherlock, Sasha Levy
To reduce the operational friction and scale DNA engineering, we report here an in vivo DNA assembly technology platform called SCRIVENER (Sequential Conjugation and Recombination for In Vivo Elongation of Nucleotides with low ERrors). SCRIVENER combines

A Note on Tangential Quadrilaterals

September 2, 2024
Author(s)
Pradeep Das, Abhishek Juyal, Dustin Moody
A tangential quadrilateral is a convex quadrilateral whose sides are simultaneously tangent to a single circle. In this paper, the primary objective is to construct rational tangen- tial quadrilaterals characterized by having rational area, as well as

Advanced Co-simulation Framework for Assessing the Interplay between Occupant Behaviors and Demand Flexibility in Commercial Buildings

September 2, 2024
Author(s)
Zhelun Chen, Jin Wen, Yicheng Li, L James Lo, Gabriel Grajewski, Vance (Wm.) Payne, Steven T. Bushby, Amanda Pertzborn, Zheng O'Neill, Zhiyao Yang, Caleb Calfa
With buildings contributing significantly to electricity usage, enabling demand flexibility becomes a challenge, especially when accounting for occupant comfort. This study introduces an advanced co-simulation framework that integrated a range of models

An Overarching Quality Evaluation Framework for Additive Manufacturing Digital Twin

September 2, 2024
Author(s)
Yan Lu, Zhuo Yang, Shengyen Li, Yaoyao Fiona Zhao, Jiarui Xie, Mutahar Safdar, Hyunwoong Ko
The key differentiation of digital twins from existing models-based engineering approaches lies in the continuous synchronization between physical and virtual twins through data exchange. The success of digital twins, whether operated automatically or with

Data Science Education in Undergraduate Physics: Lessons Learned from a Community of Practice

September 1, 2024
Author(s)
Karan Shah, Julie Butler, Alexis Knaub, Anil Zenginoglu, William Ratcliff, Mohammad Soltanieh-ha
It is becoming increasingly important that physics educators equip their students with the skills to work with data effectively. However, many educators may lack the necessary training and expertise in data science to teach these skills. To address this

Magnetic transitions and magnetocaloric effect of Pr(Ga,Ge) compounds

September 1, 2024
Author(s)
Hao Liu, Xinqi Zheng, Hui Wu, Juping Xu, Yawei Gao, Dingsong Wang, Jiawang Xu, Shanshan Zhen, Jiahao Gao, Yang Pan, Guyue Wang, Jingyan Zhang, He Huang, Yanfei Wu, Wen Yin, Shouguo Wang, Baogen Shen
The effect of Ge substitution for Ga atoms on the magnetic properties and MCE of the resulting Pr(Ga,Ge) compounds was systematically investigated by the combined magnetic measurements and neutron powder diffraction (NPD) experiments. Two magnetic

Measurement of Chloride in Concrete by Prompt Gamma Neutron Activation

September 1, 2024
Author(s)
Richard A. Livingston, Preethi Sridhar, Neal Berke, Amde M. Amde, Heather H. Chen-Mayer
Prompt Gamma Activation Analysis (PGAA) is an elemental analysis method based on radiative neutron capture that is isotope-specific and has a high sensitivity to chlorine (Cl). To evaluate the feasibility of replacing the conventional wet chemistry method

Calibration of Autler-Townes based electrometry in Rydberg states of alkali atoms

August 30, 2024
Author(s)
Noah Schlossberger, Nikunjkumar Prajapati, Alexandra Artusio-Glimpse, Samuel Berweger, Matthew Simons, William Watterson, Dangka Shylla, Christopher Holloway
Highly excited states of alkali atoms are a powerful tool for making SI-traceable electric field measurements without the need for an external reference. However, the calibration of these measurements suffers from ambiguity in which transition dipole

Detecting Firefighter's Tenability Utilizing Machine Learning

August 30, 2024
Author(s)
Qi Tong, Hongqiang FANG, Eugene Yujun Fu, Wai Cheong Tam, Thomas Gernay
The proposed research aims to leverage machine learning to detect thermal operating classes and improve the tenability of firefighters in a commercial building. A total of 3000 simulations are run with FDS to collect temperature from heat detectors. The

Differential Measurements of an AC Source with a Josephson Arbitrary Waveform Synthesizer

August 30, 2024
Author(s)
Alain Rufenacht, Raegan Johnson, Anna Fox, Nathan Flowers-Jacobs, Charlie Burroughs, Samuel Benz, Paul Dresselhaus, STEPHANE SOLVE, Jesus Mejia
This paper describes differential sampling measurements of an ac source and a Josephson arbitrary waveform synthesizer (JAWS). A new iterative approach for aligning the phases of the JAWS and the source waveforms was implemented to minimize the

Digitizer Linearity Measurement with a Josephson Arbitrary Waveform Synthesizer

August 30, 2024
Author(s)
Jesus Mejia, Alain Rufenacht, Raegan Johnson, Anna Fox, Nathan Flowers-Jacobs, Samuel Benz, Paul Dresselhaus
This article examines the non-linearity and gain error of a commercial digitizer on the 100 mV range with a Josephson Arbitrary Waveform Synthesizer (JAWS) as a reference. Different digitizer input filter settings were studied, and the shortest aperture of

Drug Detection, Analysis, and Monitoring Workshop Report

August 30, 2024
Author(s)
Edward Sisco
This report is a summary of a workshop convened to capture the analytical and data challenges inherent to the detection, identification, and monitoring of illicit drugs in the United States – specifically highlighting current practices, challenges, and

Dual-Frequency-Bias Programmable Josephson Voltage Standard Circuit Design

August 30, 2024
Author(s)
Alain Rufenacht, Anna Fox, Paul Dresselhaus, Samuel Benz
This paper presents a new 2 V programmable Josephson voltage standard circuit with dual microwave frequency input. This design provides three main features: (1) output voltages with nanovolt resolution, (2) the ability to perform a microwave frequency self
Displaying 1076 - 1100 of 73697
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