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Search Publications

NIST Authors in Bold

Displaying 101 - 125 of 143548

Modulated Laser Thermal Interrogation (MLTI): A Novel In Situ Metal Powder Evaluation Technique for Laser Powder Bed Fusion

March 1, 2025
Author(s)
Sina Ghadi, Xiaobo Chen, Nicholas Tomasello, Nicholas Derimow, Srikanth Rangarajan, Guangwen Zhou, Scott Schiffres
Assessment of metal powders in powder bed additive manufacturing is crucial, as the quality of the powders significantly impacts the final printed parts. This study introduces a novel technique to characterize metal powders by analyzing changes in their

SLowFlowS: A novel flow standard for semiconductor process gases

March 1, 2025
Author(s)
Jodie Gail Pope, Keith A. Gillis, Aaron Johnson, Joey Boyd, John Wright
Numerous process gases are used in the production of semiconductor chips. Accurate metering of these gases into process chambers is critical for maximizing device throughput and yield. A national flow standard for semiconductor process gases does not exist

High-endurance bulk CMOS one-transistor cryo-memory

February 28, 2025
Author(s)
Alexander Zaslavsky, Pragya Shrestha, Valery Ortiz Jimenez, Jason Campbell, Curt Richter
Previously we reported a compact one-transistor (1T) 180 nm bulk CMOS cryo-memory with a high 10^7 I_1/I_0 memory window and long 800 s retention time based on impact-ionization-induced charging of the transistor body. Here, we present the endurance and

Product ion distributions using H3O+ proton-transfer-reaction time-of-flight mass spectrometry (PTR-ToF-MS): mechanisms, transmission effects, and instrument-to-instrument variability

February 27, 2025
Author(s)
Michael Link, Megan Claflin, Christina Cecelski, Ayomide Akande, Delany Kilgour, Paul Heine, Matthew Coggon, Chelsea Stockwell, Andrew Jensen, Jie Yu, Han Huyhn, Jenna Ditto, Carnsten Warneke, William Dresser, Keighan Gemmell, Spiro Jorga, Rileigh Robertson, Joost de Gouw, Timothy Bertram, Jonathan Abbatt, Nadine Borduas-Dedekind, Dustin Poppendieck
Proton-transfer-reaction mass spectrometry (PTR-MS) using hydronium ion (H3O+) ionization is widely used for the measurement of volatile organic compounds (VOCs) both indoors and outdoors. H3O+ ionization, as well as the associated chemistry in an ion

Prioritizing Cybersecurity Risk for Enterprise Risk Management

February 26, 2025
Author(s)
Stephen Quinn, Nahla Ivy, Matthew Barrett, Greg Witte, Robert Gardner
This document is the second in a series that supplements NIST Interagency Report (IR) 8286, Integrating Cybersecurity and Enterprise Risk Management (ERM). This series provides additional detail regarding the enterprise application of cybersecurity risk

Using Business Impact Analysis to Inform Risk Prioritization and Response

February 26, 2025
Author(s)
Stephen Quinn, Nahla Ivy, Julie Anne Chua, Matthew Barrett, Larry Feldman, Daniel Topper, Greg Witte, Robert Gardner
While business impact analysis (BIA) has historically been used to determine availability requirements for business continuity, the process can be extended to provide a broad understanding of the potential impacts of any type of loss on the enterprise

A Security Perspective on the Web3 Paradigm

February 25, 2025
Author(s)
Dylan Yaga, Peter Mell
Web3 is a proposed vision for the future of the internet that is restructured to be more user-centric with an emphasis on decentralized data. Users would own and manage their personal data, and systems would be decentralized and distributed. Digital tokens

Don't Use LLMs to Make Relevance Judgments

February 25, 2025
Author(s)
Ian Soboroff
Making the relevance judgments for a TREC-style test collection can be complex and expensive. A typical TREC track usually involves a team of six contractors working for 2-4 weeks. Those contractors need to be trained and monitored. Software has to be

Kolmogorov turbulence in atomic Bose-Einstein condensates

February 25, 2025
Author(s)
Ian Spielman, Mingshu Zhao, Junheng Tao
We investigated turbulence in atomic Bose-Einstein condensates (BECs) using a minimally destructive, impurity injection technique analogous to particle image velocimetry in conventional fluids. Our approach transfers small regions of the BEC into a

Measurement resolution enhanced coherence for lattice fermions

February 25, 2025
Author(s)
Ian Spielman, Hilary Hurst, Yik Teoh
Weak measurement enables the extraction of targeted information from a quantum system while minimizing decoherence due to measurement backaction. However, in many-body quantum systems backaction can have unexpected effects on wavefunction collapse. We

System Vicarious Calibration for climate and global long-term operational ocean color applications

February 25, 2025
Author(s)
Giuseppe Zibordi, B. Carol Johnson, Ewa Kwiatkowska, Kenneth Voss, David Antoine, Sean William Bailey, Andrew Barnard, Brian Barnes, Agnieszka Bialek, Shuguo Chen, Susanne Craig, Constant Mazeran, FREDERIC MELIN, Jee-Eun Min, Hiroshi Murakami, Menghua Wang
System Vicarious Calibration (SVC) enhances the accuracy of satellite ocean color radiometric data products by removing the bias due to the intrinsic inaccuracies affecting both the responsivity of the space sensor and the correction for the atmospheric

Compressed Liquid (p-r-T) Measurements of trans-1,2-Dichloroethene [R1130(E)]

February 24, 2025
Author(s)
Tara Fortin, Stephanie Outcalt
Pressure-density-temperature (p-ρ-T) data for the refrigerant R-1130(E) (trans-1,2-dichloroethene) were measured in the compressed liquid phase using an automated vibrating tube densimeter. Overall, the measurements covered temperatures from 270 K to 410 K

Accurate keyhole instability prediction in metal additive manufacturing through machine learning-aided numerical simulation

February 20, 2025
Author(s)
Jiahui Zhang, Runbo Jiang, Kangming Li, Pengyu Chen, Xiao Shang, Zhiying Liu, Brian Simonds, Qianglong Wei, Hongze Wang, Jason Hattrick-Simpers, Tao Sun, Anthony Rollet, Yu Zou
A primary obstacle impeding the use of metal additive manufacturing technologies in fatigue-sensitive applications is the presence of porosity, primarily caused by keyhole instability. To tackle this challenge, it is imperative to accurately forecast

Role of NEIL1 in genome maintenance

February 19, 2025
Author(s)
Amanda McCullough, Irina Minko, Michael Luzadder, Jamie Zuckerman, Pawel Jaruga, Vladimir Vartanian, M Miral Dizdar, R. Stephen Lloyd
Phylogenetic analyses of DNA glycosylases that function in the initiation step of base excision repair reveal a high degree of conservation within the genes encoding Nei-like DNA glycosylase 1 (NEIL1). In concert with other glycosylases, this enzyme is an

State Space Neural Network with Nonlinear Physics for Mechanical System Modeling

February 19, 2025
Author(s)
Reese Eischens, Tao Li, Gregory Vogl, Yi Cai, Yongzhi Qu
Dynamic modeling of mechanical systems is important for the monitoring, diagnostics, control, and prediction of system behaviors. Modeling dynamic system is one of the emerging tasks in scientific machine learning. Neural networks have been used to learn

Evaluations of the decay data of 55Fe, 55Co, 103mRh, 103Pd, 129mSn and 166Ho from the Decay Data Evaluation Project (DDEP)-2024

February 18, 2025
Author(s)
Xavier Mougeot, Philippe Cassette, Valery Chechev, Christophe Dulieu, Xiaolong Huang, Mark Kellett, Tibor Kibedi, Nikolay Kuzmenko, Sylvain Leblond, Alan Nichols, Brian Zimmerman
Since 1995, members of the Decay Data Evaluation Project (DDEP) have evaluated the decay data from different radionuclides of special interest for metrology or practical applications, e.g. nuclear medicine, monitoring and reactor shielding, etc. Since 2004

Rheology and Microstructural Behavior of Semidilute Suspensions of Semiflexible Rods across Five Decades of Shear Rate

February 18, 2025
Author(s)
Paul Salipante, Ryan Murphy, Steve Kuei, Jeffrey Fagan, Christopher Sims, Kathleen Weigandt, Steven Hudson
Rod-like particles are efficient rheology modifiers and are commonly found in a variety of biological and industrially relevant suspensions, from biofilaments to worm-like surfactant micelles. These suspensions display strong shear-thinning behavior, and

WLAN 802.11ax Airtime Utilization Measurements

February 18, 2025
Author(s)
Nadia Yoza Mitsuishi, Jason Coder, Yao Ma
Due to the increasing demand for wireless services, the IEEE 802.11ax WLAN standard was released to enable improved performance, coverage, and spectrum efficiency. Given these advantages, its use has become more widespread in recent years, but measurements
Displaying 101 - 125 of 143548