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Search Publications

NIST Authors in Bold

Displaying 1026 - 1050 of 74084

Modification of Nafion's Nanostructure for the Water Management of PEM Fuel Cells

April 15, 2023
Author(s)
Yuanchao Li, Natalie Schwab, Robert M. Briber, Joseph A. Dura, Trung Van Nguyen
A PEM fuel cell with the Nafion® ionomer phase of the cathode catalyst layer (CL) that was exposed to dry gas during the annealing process showed improved performance over the whole current density range and 220% peak power increase with humidified air at

Vision-based thermal drift monitoring method for machine tools

April 15, 2023
Author(s)
Gregory W. Vogl, Ainsley Rexford, Zongze Li, Robert Landers, Edward Kinzel, Alkan Donmez, Joe Chalfoun
A method is presented to measure machine tool thermal drift for error compensation. A wireless microscope within a tool holder in the spindle is used to capture videos of image targets attached to the worktable. For each target, one video is captured

A Tabletop X-Ray Tomography Instrument for Nanometer-Scale Imaging: Reconstructions

April 14, 2023
Author(s)
Zachary H. Levine, Bradley Alpert, Amber Dagel, Joseph Fowler, Edward Jiminez, Nathan J. Nakamura, Daniel Swetz, Paul Szypryt, Kyle Thompson, Joel Ullom
We show three-dimensional reconstructions of a region of an integrated circuit from a 130 nm copper process. The reconstructions employ x-ray computed tomography, measured with a new and innovative high-magnification x-ray microscope. The instrument uses a

Discussion on the Full Entropy Assumption of the SP 800-90 Series

April 14, 2023
Author(s)
Darryl Buller, Aaron Kaufer, Allen Roginsky, Meltem Sonmez Turan
The NIST SP 800-90 series [1][2][3] supports the generation of high-quality random bits for cryptographic and non-cryptographic use. The security strength of a random number generator depends on the unpredictability of its outputs. This unpredictability

Variant calling and benchmarking in an era of complete human genome sequences

April 14, 2023
Author(s)
Nathanael David Olson, Justin Wagner, Nathan Dwarshuis, Karen Miga, Marc L. Salit, Justin Zook
Genetic variant calling from DNA sequencing has enabled understanding of germline variation in hundreds of thousands of humans. Sequencing technologies and variant-calling methods have advanced rapidly, routinely providing reliable variant calls in most of

A high-strength precipitation hardened cobalt-free high-entropy alloy

April 12, 2023
Author(s)
Matthew Luebbe, Jiaqi Duan, Fan Zhang, Jonathan Poplawsky, Hans Pommeranke, Maalavan Arivu, Andrew Hoffman, Haiming Wen
Recent studies on precipitation-hardened high-entropy alloys (HEAs) demonstrate their high strength and thermal stability, making them promising materials for high-temperature structural applications such as nuclear reactors. However, many existing HEAs

Multivariate Flexible Framework with High Usable Hydrogen Capacity in a Reduced Pressure Swing Process

April 12, 2023
Author(s)
Arijit Halder, Ryan Klein, Sarah Shulda, Gavin McCarver, Philip Parilla, Hiroyasu Furukawa, Craig Brown, C. Michael McGuirk
Step-shaped adsorption¬–desorption of gaseous payloads by a flexible metal–organic framework can facilitate the delivery of large usable capaci-ties with significantly reduced energetic penalties. This is desirable for the storage, transport, and delivery

Rydberg Excitons and Trions in Monolayer MoTe2

April 12, 2023
Author(s)
Souvik Biswas, Aurelie Champagne, Jonah Haber, supavit pokawanvit, Joeson Wong, Hamidreza Akbari, Sergiy Krylyuk, Kenji Watanabe, Albert Davydov, Zakaria Al Balushi, Felipe H. da Jornada, Diana Qiu, Jeffrey Neaton, Harry Atwater
Monolayer transition metal dichalcogenide (TMDC) semiconductors exhibit strong excitonic optical resonances which serve as a microscopic, non-invasive probe into their fundamental properties. Like the hydrogen atom, such excitons can exhibit an entire

Prediction of Sustainable Aviation Fuel Properties for Liquid Hydrocarbons from Hydrotreating Biomass Catalytic Fast Pyrolysis Derived Organic Intermediates

April 11, 2023
Author(s)
Suphat Watanasiri, Kristiina Iisa, Eugene Paulechka, Earl Christensen, Chris Muzny, Abhijit Dutta
Catalytic fast pyrolysis (CFP) of wood, woody residues, and agricultural waste has the potential to produce organic liquid intermediates that can be hydroprocessed to sustainable aviation fuels (SAF). In this article we present results of property

Production, purification and characterization of 15N5-labeled cis- and trans-aflatoxin B1-formamidopyrimidines, and aflatoxin B1-N7-guanine as internal standards for mass spectrometric measurements

April 11, 2023
Author(s)
Pawel Jaruga, Melis Kant, Miral M. Dizdar, Rachana Tomar, Vladimir Vartanian, Benjamin Sexton, Carmelo Rizzo, Robert Turesky, Michael Stone, R. Stephen Lloyd
Exposure to aflatoxin B1 (AFB1) through contaminated food is a primary contributor to the occurrence of hepatocellular carcinogenesis worldwide. Hepatitis B viral infections in livers dramatically increase the carcinogenic potency of AFB1 exposures. Liver

Scalable Multi-Agent Lab Framework for Lab Optimization

April 11, 2023
Author(s)
A. Gilad Kusne, Austin McDannald
Autonomous materials research systems allow scientists to fail smarter, learn faster, and spend less resources in their studies. As these systems grow in number, capability, and complexity, a new challenge arises – how will they work together across large

The emerging landscape of single-molecule protein sequencing technologies

April 11, 2023
Author(s)
Zvi Kelman, John Marino
Single-cell profiling methods have had a profound impact on the understanding of cellular heterogeneity. While genomes and transcriptomes can be explored at the single-cell level, single-cell profiling of proteomes is not yet established. Here we describe

Constraints on Gaussian Error Channels and Measurements for Quantum Communication

April 10, 2023
Author(s)
Alexander T. Kwiatkowski, Ezad Shojaee, Sristy Agrawal, Akira Kyle, Curtis Rau, Scott Glancy, Emanuel Knill
Joint Gaussian measurements of two quantum systems are important for quantum communication between remote parties and are often used in continuous-variable teleportation or entanglement-swapping protocols. Many of the errors in real-world implementations

Quantum back-action limits in dispersively measured Bose-Einstein condensates

April 8, 2023
Author(s)
Ian Spielman, Emine Altuntas
A fundamental tenet of quantum mechanics is that measurements change a system's wavefunction to that most consistent with the measurement outcome, even if no observer is present. Weak measurements produce only limited information about the system, and as a
Displaying 1026 - 1050 of 74084