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Displaying 1926 - 1950 of 143797

Bootstrapped Dimensional Crossover of a Spin Density Wave

October 27, 2023

Author(s)

Anjana Samarakoon, J. Strempfer, Junjie Zhang, Feng Ye, Yiming Qiu, J.-W. Kim, H. Zheng, S. Rosenkranz, M. Norman, J. Mitchell, D. Phelan

Quantum materials display rich and myriad types of magnetic, electronic, and structural ordering, often with these ordering modes either competing with one another or 'intertwining,' that is, reinforcing one another. Low dimensional quantum materials

Enhanced strength of additively manufactured Inconel 718 by means of a simplified heat treatment strategy

October 27, 2023

Author(s)

Jake Benzing, Nicholas Derimow, Orion Kafka, Nik Hrabe, Philipp Schumacher, Don Godfrey, Chad Beamer, Priya Pathare, Jay Carroll, Ping Lu, Isaiah Trujillo, Frank DelRio

This study simplified the heat treatment route and reduced the post-processing burden for laser powder bed fusion IN718 (a nickel-based superalloy). The tailored route retained advantageous microstructures and improved tensile strength when compared to the

Security Analysis of Trust on the Controller in the Matter Protocol

October 27, 2023

Author(s)

Kumar Shashwat, Francis Hahn, Xinming Ou, Anoop Singhal

Matter is an open-source connectivity standard for the purpose of allowing smart home IoT devices from different vendors to interoperate with one another. A controller in a Matter system commissions new devices into the Matter fabric. The device needs to

Construction of Negative Electrostatic Pore Environments in a Scalable, Stable and Low-Cost Metal-Organic Framework for One-Step Ethylene Purification from Ternary Mixtures

October 26, 2023

Author(s)

Hui-Min Wen, Chenyi Yu, Miaoyu Liu, Chenyan Lin, Beiyu Zhao, Hui Wu, Wei Zhou, Banglin Chen, Jun Hu

One-step separation of C2H4 from ternary C2mixtures by physisorbents remains a challenge to combine excellent separation performance with high stability, low cost, and easy scalability for industrial applications. Herein, we report a strategy of

Energy-Efficient Access Point Deployment for Industrial IoT Systems

October 26, 2023

Author(s)

Xiaowen Qi, Jing Geng, Mohamed Hany, Shuvra Bhattacharyya, Rick Candell

Internet of Things (IoT) technologies have impacted many fields by opening up much deeper and more extensive integration of communications connectivity, sensing, and embedded processing. The industrial sector is among the areas that have been impacted

Multi-mode microcavity frequency engineering through a shifted grating in a photonic crystal ring

October 26, 2023

Author(s)

Xiyuan Lu, Yi Sun, Ashish Chanana, Usman Javid, Marcelo Davanco, Kartik Srinivasan

Frequency engineering of whispering-gallery resonances is essential in microcavity nonlinear optics. The key is to control the frequencies of the cavity modes involved in the underlying nonlinear optical process to satisfy its energy conservation criterion

A framework to characterize WUI firebrand shower exposure using an integrated approach combining 3D particle tracking and machine learning

October 25, 2023

Author(s)

Nicolas Bouvet, Savannah Wessies, Eric Link, Stephen Fink

Firebrand showers are known for their devastating effects throughout Wildland-Urban Interface (WUI) communities threatened by wildfires. In this work, we propose a framework to better characterize firebrand flows and facilitate exposure comparisons across

A superconducting nanowire single-photon camera with 400,000 pixels

October 25, 2023

Author(s)

Bakhrom Oripov, Dana Rampini, Jason Allmaras, Matt Shaw, Sae Woo Nam, Boris Korzh, Adam McCaughan

For the past 50 years, superconducting detectors have offered exceptional sensitivity and speed for detecting faint electromagnetic signals in a wide range of applications. These detectors operate at very low temperatures and generate a minimum of excess

Breakdown of the drift-diffusion model for transverse spin transport in a disordered Pt film

October 25, 2023

Author(s)

Kirill Belashchenko, Giovanni G. Baez Flores, Wuzhang Fang, Alexei Kovalev, Mark van Schilfgaarde, Mark Stiles, Paul M. Haney

Spin accumulation and spin current profiles are calculated for a disordered Pt film subjected to an in-plane electric current within the nonequilibrium Green function approach. In the bulklike region of the sample, this approach captures intrinsic spin

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

Rotational magic conditions for ultracold molecules in the presence of Raman and Rayleigh scattering

October 24, 2023

Author(s)

Svetlana Kotochigova, Qingze Guan, Eite Tiesinga, Vito Scarola, Brian DeMarco, Bryce Gadway

Molecules have vibrational, rotational, spin-orbit and hyperfine degrees of freedom or quantum states, each of which responds in a unique fashion to external electromagnetic radiation. The control over superpositions of these quantum states is key to

Adaptive Maximization of Harvested Kinetic Energy for Small Wearable Medical Sensors

October 23, 2023

Author(s)

Hamid Mahboubi, Kamran Sayrafian, Amir Aghdam

Energy harvesting (EH) is the process of capturing and storing energy from external sources or the ambient environment. The EH devices have found various emerging applications, particularly, in healthcare sector. Kinetic-based micro energy-harvesting is a

Analysis of a Steel Gravity Frame with Composite Floor System Subjected to Compartment Fire (Test #2)

October 23, 2023

Author(s)

Mohammed Morovat, Joseph Main, Jonathan Weigand, Malcolm Ammons, Fahim H. Sadek, Long Phan

This report describes the development and validation of a computational modeling approach for steel gravity frames with composite floor systems subjected to fire exposure. A full-scale compartment fire test conducted on a two-story steel gravity frame

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

Generation of Firebrands from the Burning of Full-Scale Vegetation in the Absence of Ambient Wind

October 23, 2023

Author(s)

Isaac Leventon, Mahdi Tlemsani, Mohammadhadi Hajilou, Xiaoyu Ju, Michael Gollner

9 Between December 2019 and January 2020, 14 full-scale experiments were conducted at the University of 10 Maryland (UMD) in collaboration with the National Institute of Standards and Technology (NIST) to measure 11 variations in burning behavior and fireb

Impact of the Exposure Time and Distance Thresholds on the Performance of Automatic Contact Tracing

October 23, 2023

Author(s)

Brian D. Cloteaux, Vladimir Marbukh, Kamran Sayrafian

Automatic exposure notification apps operate based on guidelines that specify distance and time thresholds to measure the occurrence of contacts with infected individuals. In the United States 2 m/15 min thresholds are used to determine exposures due to a

META LEARNING WITH LANGUAGE MODELS: CHALLENGES AND OPPORTUNITIES IN THE CLASSIFICATION OF IMBALANCED TEXT

October 23, 2023

Author(s)

Apostol Vassilev, Honglan Jin, Munawar Hasan

Detecting out of policy speech (OOPS) content is important but difficult. While machine learning is a powerful tool to tackle this challenging task, it is hard to break the performance ceiling due to factors like quantity and quality limitations on

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

Modeling of Black PMMA in the NIST Gasification Apparatus using Fire Dynamics Simulator

October 20, 2023

Author(s)

Jason Floyd, Morgan Bruns, Isaac Leventon, Kevin B. McGrattan

12 This poster presents Fire Dynamics Simulator (FDS) simulations of anerobic, PMMA, gasification tests 13 performed by the National Institute of Standards and Technology for MaCFP-3. 14 Five sets of simulations where performed: 15 1. Simulations of an

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

Angular dependence of spin-orbit torque in monolayer Fe3GeTe2

October 18, 2023

Author(s)

Fei Xue, Mark Stiles, Paul M. Haney

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

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