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Displaying 1876 - 1900 of 143737

Grating magneto-optical traps with complicated level structures

October 25, 2023
Author(s)
Daniel Barker, Peter Elgee, Ananya Sitaram, Eric Norrgard, Nikolai Klimov, Gretchen K. Campbell, Stephen Eckel
We study the forces and optical pumping within grating magneto-optical traps (MOTs) operating on transitions with non-trivial level structure. In contrast to the standard six-beam MOT configuration, rate equation modelling predicts that the asymmetric

Single-Detector Double-Beam Modulation for High-Sensitivity Infrared Spectroscopy

October 25, 2023
Author(s)
Seongmin Kim, Yow-Ren Chang, Young Jong Lee
Balanced detection based on double beams is widely used to reduce common-mode noises, such as laser intensity fluctuation and irregular wavelength scanning, in absorption spectroscopy. However, employing an additional detector can increase the total system

Emergent ferromagnetism with superconductivity in Fe(Te,Se) van der Waals Josephson junctions

October 23, 2023
Author(s)
Gang Qiu, Hung-Yu Hu, Lunhui Hu, Huairuo Zhang, Chi-Yen Chen, Yanfeng Lyu, Christopher Eckberg, Peng Deng, Sergiy Krylyuk, Albert Davydov, Ruixing Zhang, Kang Wang
Ferromagnetism and superconductivity are two key ingredients for topological superconductors, which can serve as building blocks of fault-tolerant quantum computers. Adversely, ferromagnetism and superconductivity are typically also two hostile orderings

Emerging Nontrivial Topology in Ultrathin Films of Rare-Earth Pnictides

October 23, 2023
Author(s)
Dai Ho, Ruiqi Hu, Quang To, Garnett Bryant, Anderson Janotti
Thin films of semimetals, such as rare-earth monopnictides, are expected to turn into semiconductors due to quantum confinement effect, which lifts the overlap between electron pockets at Brillouin zone edges and hole pockets at the zone center. Instead

SARS-CoV-2 infection establishes an enhanced, stable, and age-independent CD8+ T cell response against a dominant nucleocapsid epitope using highly restricted TCRs

October 23, 2023
Author(s)
Cecily Choy, Joseph Chen, Jiangyuan Li, Jian Lu, Daichao Wu, Ainslee Zou, Humza Hemani, Beverly Baptiste, Emily Wichmann, Qian Yang, Jeffrey Ciffelo, Rui Yin, Julia McKelvy, Denise Melvin, Tonya Wallace, Christopher Dunn, Cuong Nguyen, Chee Chia, Jingshui Fan, Jeannie Ruffolo, Linda Zukley, Guixin Shi, Tomokazu Amano, An Yang, Osorio Meirelles, Wells Wu, Rong-Fong Chen, RICHARD WILLIS, Minoru Ko, Y-T Liu, Supriyo De, Brian Pierce, Luigi Ferrucci, josephine egan, Roy Mariuzza, Nan-ping Weng, David Travis Gallagher
We analyzed circulating CD8+ T cells recognizing six epitopes from the SARS-CoV-2 nucleocapsid (N) protein in HLA-A2+ unexposed and recovered COVID-19 patients using multi-color flow cytometry and scRNAseq. We found that SARS-CoV-2 infection slightly

Host Defense Peptide Piscidin and Yeast-derived Glycolipid Exhibit Synergistic Antimicrobial Action through Concerted Interactions with Membranes

October 19, 2023
Author(s)
Fei Liu, Alexander Greenwood, Yawei Xiong, Rebecca Miceli, Riqiang Fu, Kyle Anderson, Scott McCallum, Ella Mihailescu, Richard Gross, Myriam Cotten
Developing new antimicrobials as alternatives to conventional antibiotics has become an urgent race to eradicate drug-resistant bacteria and save human lives. Conventionally, antimicrobial molecules are studied independently even though they can be co

Certification of Standard Reference Material(R) 2386 Avocado Powder

October 18, 2023
Author(s)
Melissa M. Phillips, Laura Wood, Joseph Browning, George Caceres, Grace Hahm, Mahboubeh Hanaee, Abigail Lee, Karen Murphy, Rabia Oflaz, Rick L. Paul, Benjamin Place, Jeanice "Brown Thomas ", James H. Yen
The National Institute of Standards and Technology (NIST) recently released SRM 2386 Avocado Powder which has value assignment for over 70 analytes. This material is intended to be used for the evaluation of methods for the determination of elements

Observation of anisotropic superfluid density in an artificial crystal

October 18, 2023
Author(s)
Ian Spielman, Mingshu Zhao, Junhent Tao
We experimentally and theoretically investigate the anisotropic speed of sound of an atomic superfluid (SF) Bose-Einstein condensate in a 1D optical lattice. Because the speed of sound derives from the superfluid density, implying that this density is

Recent progress in the JARVIS infrastructure for next-generation data-driven materials design

October 18, 2023
Author(s)
Daniel Wines, Ramya Gurunathan, Kevin Garrity, Brian DeCost, Adam Biacchi, Francesca Tavazza, Kamal Choudhary
The Joint Automated Repository for Various Integrated Simulations (JARVIS) infrastructure at NIST is a large-scale collection of curated datasets and tools with more than 80000 materials and millions of properties. JARVIS uses a combination of electronic

A Measurement-Referenced Error Vector Magnitude for Counterfeit Cellular Device Detection

October 17, 2023
Author(s)
Ameya Ramadurgakar, Kate Remley, Dylan Williams, Jake Rezac, MELINDA PIKET-MAY, Rob Horansky
Standard formulations of error vector magnitude compare a wireless device's symbol constellation to an ideal reference constellation. In this work, we utilize the residual error vector magnitude, which uses measurements of a wireless device to define a

Dynamic Range by Design in OTA EVM measurements

October 17, 2023
Author(s)
Paritosh Manurkar, Dan Kuester, Joshua Kast, Rob Horansky
We present an experimental approach to design an over-the-air (OTA) millimeter-wave measurement of error vector magnitude (EVM) and associated uncertainties that include correlations and nonlinearities. Our approach uses a waveguide-variable attenuator at

New Equation of State Constraints in the Critical Region

October 17, 2023
Author(s)
Ian Bell, Eric W. Lemmon
In this work, two classes of defects with multiparameter equations of state are investigated. In the first, it is shown that the critical point provided by equation of state developers often does not exactly meet the criticality conditions based on the

Cybersecurity Framework Profile for Electric Vehicle Extreme Fast Charging Infrastructure

October 16, 2023
Author(s)
Nakia R. Grayson, Jim McCarthy, Joseph Brule, alan Dinerman, John Dombrowski, Michael Thompson, Hillary Tran, Anne Townsend
This document is the Cybersecurity Framework Profile (Profile) developed for the Electric Vehicle Extreme Fast Charging (EV/XFC) ecosystem and the subsidiary functions that support each of the four domains: (i) Electric Vehicles (EV); (ii) Extreme Fast
Displaying 1876 - 1900 of 143737
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