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arXiv 2024年

作者： Kopas, Cameron J. Goronzy, Dominic p. pham, Thang Torres Castanedo, Carlos G. Cheng, Matthew Cochrane, Rory Nast, patrick Lachman, Ella Zhelev, Nikolay Z. Vallières, André Murthy, Akshay A. Oh, Jin-su Zhou, Lin Kramer, Matthew J. Cansizoglu, Hilal Bedzyk, Michael J. Dravid, Vinayak p. Romanenko, Alexander Grassellino, Anna Mutus, Josh Y. Hersam, Mark C. Yadavalli, Kameshwar Rigetti Computing BerkeleyCA United States Department of Materials Science and Engineering Northwestern University EvanstonIL United States Center for Applied Physics and Superconducting Technologies Northwestern University EvanstonIL United States Department of Physics and Astronomy Northwestern University EvanstonIL United States Department of Physics University of Oregon EugeneOR United States Graduate Program in Applied Physics Northwestern University EvanstonIL60208 United States Fermi National Accelerator Laboratory BataviaIL United States Ames Laboratory U.S. Department of Energy AmesIA United States Northwestern University EvanstonIL United States Department of Chemistry Northwestern University EvanstonIL United States Department of Electrical and Computer Engineering Northwestern University EvanstonIL United States

The performance of superconducting qubits is often limited by dissipation and two-level systems (TLs) losses. The dominant sources of these losses are believed to originate from amorphous materials and defects at interfaces and surfaces, likely as a result of fabrication processes or ambient exposure. Here, we explore a novel wet chemical surface treatment at the Josephson junction-substrate and the substrate-air interfaces by replacing a buffered oxide etch (BOE) cleaning process with one that uses hydrofluoric acid followed by aqueous ammonium fluoride. We show that the ammonium fluoride etch process results in a statistically significant improvement in median T1 by ∼ 22% (p = 0.002), and a reduction in the number of strongly-coupled TLs in the tunable frequency range. Microwave resonator measurements on samples treated with the ammonium fluoride etch prior to niobium deposition also show ∼ 33% lower TLs-induced loss tangent compared to the BOE treated samples. As the chemical treatment primarily modifies the Josephson junction-substrate interface and substrate-air interface, we perform targeted chemical and structural characterizations to examine materials’ differences at these interfaces and identify multiple microscopic changes that could contribute to decreased TLs. © 2024, CC BY-NC-ND.

关键词： Fluorine compounds

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Facile synthesis of Ni2+ Doped Mgfe2o4 spinel Nanoparticles: structural, Optical, Magnetic, and Dielectric Behavior

SSRN

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ssRN 2023年

作者： Revathi, R. sukumar, M. Ubaidullah, Mohd Gupta, Manish sehgal, satbir singh Udhaya, M.p. Aji pandit, Bidhan sundararajan, M. subramani, M.A. Dash, Chandra sekhar Department of Biotechnology Periyar University Centre for Post Graduate and Research Studies Tamil Nadu Dharmapuri636 205 India Department of Applied Physics Sri Venkateswara College of Engineering Pennalur Tamil Nadu Sriperumbudur602 117 India Department of Chemistry College of Science King Saud University P.O. Box 2455 Riyadh11451 Saudi Arabia Division of Research and Development Lovely Professional University Punjab India Department of Physics Holy Cross College Nagercoil629 004 India Department of Materials Science and Engineering and Chemical Engineering Universidad Carlos III de Madrid Avenida de la Universidad 30 Leganés Madrid28911 Spain PG & Research Department of Physics Paavendhar College of Arts & Science M.V. South Thalaivasal Tamilnadu Salem636 121 India Department of Chemistry Apollo Arts and Sciences College Poonamallee Chennai602 106 India Department of Electronics and Communication Engineering Centurion University of Technology and Management Odisha Bhubaneswar752050 India Chandigarh University India

Nickel doped magnesium cubic spinel ferrite nanoparticles (Nps) were prepared through microwave combustion method (MCM). The structure of magnesium ferrite normal spinel is obtained from XRD analysis. The average crystallite size is between 26 and 17 nm. The elemental compositions and oxidizing states of Ni2+ doped MgFe2O4 ferrites were evaluated by using Xps analysis. Morphology of spinel nanoparticles were studied using HR-sEM images. The energy dispersive X-ray method is used for ensuring the presence of elements and the band gap value 2.09, 2.02, 1.85 and 1.82 eV have obtained using the tau’c relation. The magnesium spinel structure is confirmed the band at 434 and 561 cm-1 which corresponds to the stretching vibration of octahedral site (Mg2+ -O2-) and tetrahedral site (Fe3+ -O2-) respectively. From the hysteresis loops the magnetic features viz. Hc, Mr and Ms were determined. Further dielectric studies and AC conductivity of the prepared samples is performed. © 2023, The Authors. All rights reserved.

关键词： surface chemistry

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Application of Emerging Innovations in Microbiome science to space Development and settlement systems 73

Application of Emerging Innovations in Microbiome Science to...

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73rd International Astronautical Congress, IAC 2022

作者： Nastasi, Nicholas Anderson, Matthew Z. Balasubrahmaniam, Neeraja Bope, Ashleigh Britt, Rodney D. Cochran, samuel J. Gill, samuel J. Hegarty, Bridget Lee, Jiyoung stamps, Blake W. stickney, Amanda Taylor, Christopher G. Tram, Nguyen K. Van Dusen, John Varaljay, Vanessa A. Weir, Mark H. Horack, John M. Oglesbee, Michael sullivan, Matthew B. Dannemiller, Karen C. Department of Civil Environmental & Geodetic Engineering Ohio State University ColumbusOH United States Division of Environmental Health Sciences College of Public Health Ohio State University ColumbusOH United States Environmental Sciences Graduate Program Ohio State University ColumbusOH United States Department of Microbiology College of Arts and Sciences Ohio State University ColumbusOH United States Department of Microbial Infection and Immunity Ohio State University ColumbusOH United States Center for Perinatal Research The Abigail Wexner Research Institute Nationwide Children's Hospital Department of Pediatrics Ohio State University ColumbusOH United States Department of Civil and Environmental Engineering Case School of Engineering Case Western Reserve University ClevelandOH United States Department of Food Science and Technology Ohio State University ColumbusOH United States Infectious Diseases Institute Ohio State University ColumbusOH United States Soft Matter Materials Branch Materials and Manufacturing Directorate Air Force Research Laboratory Wright - Patterson AFBOH United States Department of Plant Pathology College of Food Agriculture and Environmental Science Ohio State University ColumbusOH United States Department of Anesthesiology & Pain Medicine Nationwide Children's Hospital ColumbusOH United States Airman Systems Directorate 711th Human Performance Wing Air Force Research Laboratory WPAFBOH United States Sustainability Institute Ohio State University ColumbusOH United States Department of Mechanical and Aerospace Engineering College of Engineering John Glenn College of Public Affairs Ohio State University ColumbusOH United States Department of Veterinary Biosciences College of Veterinary Medicine Ohio State University ColumbusOH United States Center of Microbiome Science Ohio State University ColumbusOH United States

Future human spaceflight beyond low-Earth orbit will bring substantial changes and new requirements to the development of fully sustainable, healthy indoor human environments across a range of gravitational, radiative, and thermal conditions. One key aspect is understanding (and potentially leveraging) microorganisms that must coexist with humans, plants, and animals in enclosed habitats (their microbiota or microbiomes). Modern, genome-resolved microbiome science provides an opportunity to better understand how we can utilize microbes to optimize space missions and protect human health and well-being long-term. Microorganisms will be critical to mission success due to their direct or indirect interactions with 1) humans, 2) other living systems (e.g., plant and animal life as a food source and for experimentation), and 3) the built environment. For example, the human gut microbiome is a complex community that has important implications for human health and performance that include mental health, nutrition intake, and immune system function. The health of plant microbiomes is also critical for sustainable, dependable, and nutritious food production. Humans, plants, and other living systems (e.g., animals used in experimentation) will also shed microbes into the built environment, which may impact human exposure, plant health, system integrity, and planetary protection from microbial contamination in both forward and reverse directions. Microbes from all three systems will interact, resulting in potentially important 'non-linear' system implications that must be understood for the overall long-term sustainability of hardware, crew, and other living systems. This paper discusses recent advances in technology that expand measurement capabilities to ultra-low-biomass samples and now allow for better understanding of microbial taxa, community structure and drivers, and functional capacity, which together will empower microbiome-optimized deep-space human exploration miss

关键词： Bacteria

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Design and Characterization of Mango Bagasse-Added Confections and Assessment of Their prebiotic Effect In Vitro

SSRN

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ssRN 2023年

作者： Luzardo-Ocampo, Ivan Daniela, Flores-Zavala Marcela, Gaytán-Martínez Aurea, K. Ramírez-Jiménez Wall-Medrano, Abraham Francisco Javier, Olivas-Aguirre Loarca-piña, Guadalupe Tecnologico de Monterrey The Institute for Obesity Research Av. Eugenio Garza Sada 2501 Sur NL MonterreyC. P. 64849 Mexico Tecnologico de Monterrey School of Engineering and Sciences Campus Guadalajara Av. General Ramon Corona 2514 Zapopan45201 Mexico Research and Graduate Program in Food Science School of Chemistry Universidad Autónoma de Querétaro Cerro de las Campanas S/N Qro. Santiago de Querétaro76010 Mexico Tecnologico de Monterrey School of Engineering and Sciences Av. Eugenio Garza Sada 2501 Sur NL MonterreyC.P. 64849 Mexico Instituto de Ciencias Biomédicas Universidad Autónoma de Ciudad Juárez Anillo Envolvente del PRONAF y Estocolmo s/n Chihuahua Ciudad Juárez32310 Mexico Blvd. Bordo Nuevo s/n Antiguo Ejido Providencia Son. Ciudad Obregón85010 Mexico

Mango bagasse (MB) is a polyphenols and fiber-rich agroindustrial by-product exhibiting technological and beneficial properties. This research aimed to design and characterize an MB-added confection and evaluate its prebiotic effect in vitro. A sensory analysis involving 51 children was conducted to select the most accepted formulation. Nine formulations with different concentration of agar and gelatin were obtained after a 3k factorial design, where texture profile analysis responses were used to select an MBC formulation that was hydrated (1:4 and 1:5 MBC:water) to reduce its hardness, being the 1:4 formulation the most promissory. Compared to MB, 1:4 formulation showed a higher protein (1.20-fold) but less total dietary fiber (TDF: -0.62-fold). The confections contained a significant amount of gallic acid, mangiferin, quercetin, and (+)-catechin (234.82-479.69 g eq. compound/100 g sample), that further contributed to a higher (p © 2023, The Authors. All rights reserved.

关键词： phenols

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Towards an integrated pelagic and benthic analysis of long-term coastal eutrophication (Guanabara Bay, Brazil)

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Environmental Advances 2024年 15卷

作者： Muniz, Jaqueline sá Earp Abuchacra, Rodrigo Coutinho peixoto, Fernando Cunha Abuchacra, paula Ferreira Falheiro sanders, Christian J. salgado, Carla Maciel Baptista Neto, José Antônio Amora-Nogueira, Leonardo Cordeiro, Renato Campello Moreira, Luciane silva pinho, Luana Valentin, Jean Louis Faustino, Allana Fonseca-Oliveira, Ana pio, Douglas Motta Carvalho, Manuela Lima pinto, samira Cristina de souza Machado, Wilson Gomes, Luiz Eduardo de Oliveira Marotta, Humberto Chemical Engineering Graduate Program Universidade Federal Fluminense (UFF) Rua Passo da Pátria 156 RJ Niterói 24210-240 Brazil Ecosystems and Global Change Laboratory (LEMG-UFF) / International Laboratory of Global Change (LINCGlobal) Biomass and Water Management Research Center (NAB-UFF) Graduate Program in Geosciences (Environmental Geochemistry) Universidade Federal Fluminense (UFF) Av. Edmundo March s/n° RJ Niterói 24210-310 Brazil Department of Geography Graduate Program in Geography Universidade do Estado do Rio de Janeiro (UERJ-FFP) Rua Dr Francisco Portela 1470 São Gonçalo Rio de Janeiro 24435-005 Brazil Instituto Militar de Engenharia (IME) Praça General Tibúrcio 80 Praia Vermelha Rio de Janeiro 22290-270 Brazil Physical Geography Laboratory (LAGEF-UFF) Department of Geography Graduate Program in Geography Universidade Federal Fluminense (UFF) Av. Gal. Milton Tavares de Souza s/n° RJ Niterói 24210-346 Brazil National Marine Science Centre Faculty of Science and Engineering Southern Cross University Coffs Harbour 2450 NSW Australia Department of Geology and Geophysics/LAGEMAR Universidade Federal Fluminense (UFF) Av. General Milton Tavares de Souza s/n RJ Niterói 24210-346 Brazil Department of Chemical Oceanography Rio de Janeiro State University Pavilhão João Lyra Filho sala 4008 Bloco E Rua São Francisco Xavier 524 Maracanã – RJ 20550-900 Brazil Department of Marine Biology Federal University of Rio de Janeiro Rio de Janeiro Brazil NGO Guardiões do Mar Rua Alfredo Azamor 739 Boa Vista RJ São Gonçalo 24466-000 Brazil Silvestrum Climate Associates L.L.C. 1 Lower Crescent Ave Sausalito CA United States

Coastal ecosystems are important destinations for natural and anthropogenic inputs, areas experiencing eutrophication from untreated sewage globally. However, the mechanistic link of how coastal waters and sediments can jointly respond to nutrient enrichment, especially nitrogen (N) and phosphorus (p), remains relatively unknown. Here, we assessed the interdecadal variability in N and p contents, comparing four surface water sampling sites (∼40-year monthly concentrations) and three <sup>210sup>pb dated sediment cores (∼70-years) in an urban bay that has received increasingly high untreated sewage discharges over the past century (Guanabara Bay, Brazil). Major eutrophication was found, with differences between waters and sediments along sampling sites. The water concentrations of total phosphorus (Tp) and dissolved inorganic nitrogen (DIN) yielded on average ∼10–45 % and ∼40–190 % higher in 2005–2017 compared to 1980–2005 period in the sampling site most influenced by the denser urban than the conserved area, respectively. Furthermore, 6-year average water concentrations indicated both recent initial decreases in the most urban area, potentially associated with new sanitation facilities, and high increases in those relatively more conserved areas. Conversely, Tp and TN sediment burial rates were less sensitive to recent changes as compared to the water concentrations, yielding ∼11 and 31 % between 1980–2005 and 2005–2017, respectively, of which also provided baselines data for earlier periods without direct pelagic measurements (i.e., 1950–1980). Thus, these findings offer new insights into substantial temporal and intra-ecosystem spatial variability of coastal eutrophication, indicating that an integrated analysis between water monitoring and sediment burial is needed to improve the diagnosis and prediction capabilities necessary for effective long-term mitigation of coastal aquatic eutrophication worldwide. © 2023

关键词： 210pb dating Coastal eutrophication sediment burial Urban bay Water monitoring

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Emerging contaminants:A One Health perspective

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The Innovation 2024年第4期5卷 140-170,139页

作者： Fang Wang Leilei Xiang Kelvin sze-Yin Leung Martin Elsner Ying Zhang Yuming Guo Bo pan Hongwen sun Taicheng An Guangguo Ying Bryan WBrooks Deyi Hou Damian EHelbling Jianqiang sun Hao Qiu Timothy MVogel Wei Zhang Yanzheng Gao Myrna Jsimpson Yi Luo scott XChang Guanyong su Bryan MWong Tzung-May Fu Dong Zhu Karl JJobst Chengjun Ge Frederic Coulon Jean Damascene Harindintwali Xiankui Zeng Haijun Wang Yuhao Fu Zhong Wei Rainer Lohmann Changer Chen Yang song Concepcion sanchez-Cid Yu Wang Ali El-Naggar Yiming Yao Yanran Huang Japhet Cheuk-Fung Law Chenggang Gu Huizhong shen Yanpeng Gao Chao Qin Hao Li Tong Zhang Natàlia Corcoll Min Liu Daniel sAlessi Hui Li Kristian KBrandt Yolanda pico Cheng Gu Jianhua Guo Jianqiang su philippe Corvini Mao Ye Teresa Rocha-santos Huan He Yi Yang Meiping Tong Weina Zhang Fidèle suanon Ferdi Brahushi Zhenyu Wang syed AHashsham Marko Virta Qingbin Yuan Gaofei Jiang Louis A.Tremblay Qingwei Bu Jichun Wu Willie peijnenburg Edward Topp Xinde Cao Xin Jiang Minghui Zheng Taolin Zhang Yongming Luo Lizhong Zhu Xiangdong Li DamiàBarceló Jianmin Chen Baoshan Xing Wulf Amelung Zongwei Cai Ravi Naidu Qirong shen Janusz pawliszyn Yong-guan Zhu Andreas schaeffer Matthias C.Rillig Fengchang Wu Gang Yu James M.Tiedje State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Department of Chemistry Hong Kong Baptist UniversityHong KongChina HKBU Institute of Research and Continuing Education Shenzhen Virtual University ParkShenzhenChina Technical University of Munich TUM School of Natural SciencesInstitute of Hydrochemistry85748 GarchingGermany School of Resources&Environment Northeast Agricultural UniversityHarbin 150030China Climate Air Quality Research UnitSchool of Public Health and Preventive MedicineMonash UniversityMelbourneVICAustralia Faculty of Environmental Science&Engineering Kunming University of Science&TechnologyKunming 650500China Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria College of Environmental Science and EngineeringNankai UniversityTianjin 300350China Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control School of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Ministry of Education Key Laboratory of Environmental Theoretical Chemistry South China Normal UniversityGuangzhouGuangdong 510006China Department of Environmental Science Baylor UniversityWacoTXUSA Center for Reservoir and Aquatic Systems Research(CRASR) Baylor UniversityWacoTXUSA School of Environment Tsinghua UniversityBeijing 100084China School of Civil and Environmental Engineering Cornell UniversityIthacaNY 14853USA Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province Zhejiang University of TechnologyHangzhou 310014China School of Environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Laboratoire d’Ecologie Microbienne Universite Claude Bernard Lyon 1UMR CNRS 5557UMR INRAE 1418VetAgro Sup69622 VilleurbanneFrance Department of Pla

Environmental pollution is escalating due to rapid global development that often prioritizes human needs over planetary *** global efforts to mitigate legacy pollutants,the continuous introduction of new substances remains a major threat to both people and the *** response,global initiatives are focusing on risk assessment and regulation of emerging contaminants,as demonstrated by the ongoing efforts to establish the UN’s Intergovernmental science-policy panel on Chemicals,Waste,and pollution *** review identifies the sources and impacts of emerging contaminants on planetary health,emphasizing the importance of adopting a One Health *** for monitoring and addressing these pollutants are discussed,underscoring the need for robust and socially equitable environmental policies at both regional and international *** actions are needed to transition toward sustainable pollution management practices to safeguard our planet for future generations.

关键词： pollution planet contaminants

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Detection of the 2021 Outburst of Rs Ophiuchi with the LsT-1 38

Detection of the 2021 Outburst of RS Ophiuchi with the LST-1

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38th International Cosmic Ray Conference, ICRC 2023

作者： Kobayashi, Yukiho Aguasca-Cabot, Arnau Bernardos Martín, María Isabel Green, David López-Coto, Rubén Abe, K. Abe, s. Aguasca-Cabot, A. Agudo, I. Alvarez Crespo, N. Antonelli, L.A. Aramo, C. Arbet-Engels, A. Arcaro, C. Artero, M. Asano, K. Aubert, p. Baktash, A. Bamba, A. Baquero Larriva, A. Baroncelli, L. Barres de Almeida, U. Barrio, J.A. Batkovic, I. Baxter, J. Becerra González, J. Bernardini, E. Bernardos, M.I. Bernete Medrano, J. Berti, A. Bhattacharjee, p. Biederbeck, N. Bigongiari, C. Bissaldi, E. Blanch, O. Bonnoli, G. Bordas, p. Bulgarelli, A. Burelli, I. Burmistrov, L. Buscemi, M. Cardillo, M. Caroff, s. Carosi, A. Carrasco, M.s. Cassol, F. Cauz, D. Cerasole, D. Ceribella, G. Chai, Y. Cheng, K. Chiavassa, A. Chikawa, M. Chytka, L. Cifuentes, A. Contreras, J.L. Cortina, J. Costantini, H. Dalchenko, M. Dazzi, F. De Angelis, A. de Bony de Lavergne, M. De Lotto, B. De Lucia, M. de Menezes, R. Del peral, L. Deleglise, G. Delgado, C. Delgado Mengual, J. della Volpe, D. Dellaiera, M. Di piano, A. Di pierro, F. Di pilato, A. Di Tria, R. Di Venere, L. Díaz, C. Dominik, R.M. Dominis prester, D. Donini, A. Dorner, D. Doro, M. Eisenberger, L. Elsässer, D. Emery, G. Escudero, J. Fallah Ramazani, V. Ferrara, G. Ferrarotto, F. Fiasson, A. Foffano, L. Freixas Coromina, L. Fröse, s. Fukami, s. Fukazawa, Y. Garcia, E. Garcia López, R. Gasbarra, C. Gasparrini, D. Geyer, D. Giesbrecht paiva, J. Giglietto, N. Giordano, F. Gliwny, p. Godinovic, N. Grau, R. Green, J. Green, D. Gunji, s. Günther, p. Hackfeld, J. Hadasch, D. Hahn, A. Hashiyama, K. Hassan, T. Hayashi, K. Heckmann, L. Heller, M. Herrera Llorente, J. Hirotani, K. Hoffmann, D. Horns, D. Houles, J. Hrabovsky, M. Hrupec, D. Hui, D. Hütten, M. Iarlori, M. Imazawa, R. Inada, T. Inome, Y. Ioka, K. Iori, M. Ishio, K. Jimenez Martinez, I. Jurysek, J. Kagaya, M. Karas, V. Katagiri, H. Kataoka, J. Kerszberg, D. Kobayashi, Y. Kohri, K. Kong, A. Kubo, H. Kushida, J. Lainez, M. Lamanna, G. Lamastra, A. Le Flour, T. Linhoff, M. Institute for Cosmic Ray Research The University of Tokyo 5-1-5 Kashiwa-no-ha Chiba Kashiwa277-8582 Japan Departament de Física Quàntica i Astrofísica Institut de Ciències del Cosmos Universitat de Barcelona IEEC-UB Martí i Franquès 1 Barcelona08028 Spain Instituto de Astrofísica de Andalucía-CSIC Glorieta de la Astronomía s/n Granada18008 Spain Max-Planck-Institut für Physik Föhringer Ring 6 München80805 Germany Department of Physics Tokai University Japan EMFTEL department IPARCOS Universidad Complutense de Madrid Spain INAF - Osservatorio Astronomico di Roma Italy INFN Sezione di Napoli Italy INFN Sezione di Padova Università degli Studi di Padova Italy The Barcelona Institute of Science and Technology Spain LAPP Univ. Grenoble Alpes Univ. Savoie Mont Blanc CNRS-IN2P3 Annecy France Universität Hamburg Institut für Experimentalphysik Germany Graduate School of Science University of Tokyo Japan Universidad del Azuay Ecuador INAF - Osservatorio di Astrofisica e Scienza dello spazio di Bologna Italy Centro Brasileiro de Pesquisas Físicas Brazil Instituto de Astrofísica de Canarias Departamento de Astrofísica Universidad de La Laguna Spain CIEMAT Spain Department of Physics TU Dortmund University Germany INFN Sezione di Bari Politecnico di Bari Italy INAF - Osservatorio Astronomico di Brera Italy INFN Sezione di Trieste Università degli Studi di Udine Italy University of Geneva Département de physique nucléaire et corpusculaire Switzerland INFN Sezione di Catania Italy Italy Aix Marseille Univ CNRS IN2P3 CPPM France INFN Sezione di Bari Università di Bari Italy INFN Sezione di Torino Italy Palacky University Olomouc Faculty of Science Czech Republic University of Alcalá UAH Spain Port d’Informació Científica Spain University of Rijeka Department of Physics Croatia Institute for Theoretical Physics and Astrophysics Universität Würzburg Germany Institut für Theoretische Physik Lehrstuhl IV: Plasma-Astroteilchenphysik Ruhr-Universität Boch

Novae are luminous explosions in close binaries which host a white dwarf and a companion donor star. They are triggered by a thermonuclear runaway when the white dwarf accretes a critical amount of matter from the secondary. Though novae are established as high-energy gamma-ray emitters through observations by the Fermi Large Area Telescope (LAT), the origin of the gamma-ray emission, whether it is hadronic or leptonic, had been under intense debate until very recently. Rs Ophiuchi (Rs Oph) is a well-known recurrent symbiotic nova with a recurrence time scale of 15 years. The most recent outburst of Rs Oph in 2021 brought the first detection of very-high-energy (VHE) gamma rays from a nova ever. The first Large-sized Telescope prototype (LsT-1) of the Cherenkov Telescope Array observed this historic event along with H.E.s.s. and MAGIC. The LsT-1 observations in the first days after the burst onset show a clear VHE gamma-ray signal from Rs Oph. The low energy threshold of LsT-1 allows us to reconstruct the Rs Oph gamma-ray spectrum down to ∼30 GeV, providing the best connection of the VHE gamma-ray data to the Fermi LAT energy range. The results from the analysis of the LsT-1 observations are consistent with those obtained with H.E.s.s. and MAGIC, and also support a hadronic origin for the observed gamma-ray fluxes. In this contribution, we will present the analysis results of the LsT-1 observations of the 2021 outburst of Rs Oph. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： White dwarfs

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Influence of Morphology on Fracture propagation of pMMAe/pC Blend in Tensile Tests at High strain Rate

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Macromolecular symposia 2020年第1期394卷 2000153-2000153页

作者： Gomes, Felipe pedro da Costa Reinaldo, Juciklécia da silva Rodrigues, Antônio Henrique Venâncio de Macedo, Thatiana Cristina pereira silva, Bismarck Luiz Ito, Edson Noriyuki Graduate Program in Materials Science and Engineering Federal University of Rio Grande do Norte Avenida Senador Salgado Filho 3000 NatalRio Grande do Norte59078–970 Brazil Mechanical Engineering Department Federal University of Rio Grande do Norte Avenida Senador Salgado Filho 3000 NatalRio Grande do Norte59078–970 Brazil Graduate Program in Materials Science and Engineering Federal University of Sergipe Avenida Marechal Rondon s/n 49100-000 São CristóvãoSergipe Brazil Materials Engineering Department Federal University of Rio Grande do Norte Avenida Senador Salgado Filho 3000 NatalRio Grande do Norte59078–970 Brazil

The aim of this study is to evaluate toughness mechanism of elastomeric poly(methyl methacrylate) (pMMAe) and polycarbonate (pC) blend through crack propagation at high speed tensile tests. samples are processed using two types of extruders, single and twin screw, in order to eliminate the influence of processing in the final product's properties. pure polymers and polymer blend samples are cryo-ultramicrotomed and their morphology is characterized using atomic force microscopy (AFM). Fractured samples obtained from uniaxial tensile tests at high strain rate are inspected using optical microscopy (OM) and scanning electron microscopy (sEM). The results obtained for the pMMAe/pC blend in tests at high deformation rate showed that the shear rate during the mixing process influences the maximum strength of the polymer blend near its region of co-continuous morphology. The visual evaluation of the fracture surface and the fractographic analysis corroborated the results of this study of polymer toughening. © 2020 Wiley-VCH GmbH

关键词： Fracture

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Magnetized and quadratic convection based thermal transport in ternary radiative bio-nanofluid via intelligent neural networks: Two hidden layers mechanism

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Results in physics 2024年 65卷

作者： Ayub, Assad Darvesh, Adil shah, syed Zahir Hussain Junjua, Moin-ud-Din santos, Elizaldo Domingues dos Ahmad, shabbir Hendy, Ahmed s. Ragab, Adham E. Department of Mathematics & Statistics Hazara University Manshera Pakistan School of Mathematical Sciences Zhejiang Normal University Zhejiang Jinhua 321004 China Programa de Pós-Graduação em Modelagem Computacional/LMCE Escola de Engenharia Universidade Federal do Rio Grande – FURG RS Rio Grande 96203900 Brazil FURG Escola de Engenharia RS Rio Grande Brazil Department of Basic Sciences and Humanities Muhammad Nawaz Sharif University of Engineering and Technology Multan 60000 Pakistan Department of Computational Mathematics and Computer Science Institute of Natural Sciences and Mathematics Ural Federal University 19 Mira St. Yekaterinburg 620002 Russian Federation Department of Industrial Engineering College of Engineering King Saud University P.O. Box 800 Riyadh 11421 Saudi Arabia Department of Mathematics Ghazi University Dera Ghazi Khan 32200 Pakistan Graduate Program of Ocean Engineering School of Engineering Universidade Federal do Rio Grande Italia Avenue km 8 96201-900 Rio Grande Brazil Department of Mechanics and Mathematics Western Caspian University Baku 1001 Azerbaijan

significance: The thermal analysis of nanofluid in a vertical cylinder (artery) in a magnetized environment holds significant implications in physiological and thermal regulation networks. This research is significant in biomedical engineering with applications like medical diagnostics and treatment strategies. Motive: This study investigates the thermal behavior of a magnetized blood-based ternary Carreau nanofluid flowing through a vertically bounded artery with quadratic convection. Velocity and heat transfer analysis is conducted within the artery, utilizing thermal radiation and quadratic convection in a magnetized setting. The base fluid consists of blood, augmented with three nanoparticles: CuO, Al<sub>2sub>O<sub>3sub>, and TiO<sub>2sub>. The investigation centers on examining the properties of blood nanofluid, arterial geometry, and thermal dynamics. Methodology: The physical model generates a set of partial differential equations (pDEs) and similarities mechanism is utilized to fetch its non dimensional form in terms of ordinary differential equations (ODEs). Furthermore, numerical outcomes are obtained with Matlab function bvp4c and obtained data set is trained through robust scheme Levenberg-Marquardt neural network (LMNN) procedure to predict the solution. Findings: Velocity of blood is reduced with increased values of wiessenberg number, magnetic parameter and mixed convection parameter and velocity increases for second-order convection parameter. Temperature profile decreases with curvature parameter, mixed convection parameter and permeability parameter. © 2024

关键词： Blood fluid Intelligent neural network Magnetized environment Ternary nanoparticles Thermal scrutiny

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Highly Reversible sodium-ion storage in A Bifunctional Nanoreactor Based on single-atom Mn supported on N-doped Carbon over Mos2Nanosheets

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Angewandte Chemie 2024年第43期136卷

作者： Doule Dr. simi sui Haonan Xie prof. Biao Chen prof. Tianshuai Wang Zijia Qi Jingyi Wang prof. Junwei sha prof. Enzuo Liu Dr. shan Zhu prof. Kaixiang Lei prof. shijian Zheng prof. Guangmin Zhou prof. Chunnian He prof. Wenbin Hu prof. Fang He prof. Naiqin Zhao Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology School of Materials Science and Engineering Hebei University of Technology Tianjin 300401 People's Republic of China National Industry-Education Platform of Energy Storage Tianjin University 135 Yaguan Road Tianjin 300350 People's Republic of China Xi'an Key Laboratory of Functional Organic Porous Materials School of Chemistry and Chemical Engineering Northwestern Polytechnical University Xi'an 710129 P. R. China Tsinghua-Berkeley Shenzhen Institute & Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 P. R. China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin University Binhai New City Fuzhou 350207 P. R. China

Conversion-type electrode materials have gained massive research attention in sodium-ion batteries (sIBs), but their limited reversibility hampers practical use. Herein, we report a bifunctional nanoreactor to boost highly reversible sodium-ion storage, wherein a record-high reversible degree of 85.65 % is achieved for Mos 2 anodes. Composed of nitrogen-doped carbon-supported single atom Mn (NC-sAMn), this bifunctional nanoreactor concurrently confines active materials spatially and catalyzes reaction kinetics. In situ/ex situ characterizations including spectroscopy, microscopy, and electrochemistry, combined with theoretical simulations containing density functional theory and molecular dynamics, confirm that the NC-sAMn nanoreactors facilitate the electron/ion transfer, promote the distribution and interconnection of discharging products (Na 2 s/Mo), and reduce the Na 2 s decomposition barrier. As a result, the nanoreactor-promoted Mos 2 anodes exhibit ultra-stable cycling with a capacity retention of 99.86 % after 200 cycles in the full cell. This work demonstrates the superiority of bifunctional nanoreactors with two-dimensional confined and catalytic effects, providing a feasible approach to improve the reversibility for a wide range of conversion-type electrode materials, thereby enhancing the application potential for long-cycled sIBs.

关键词： nanoreactor spatial confinement function atomically catalytic function reversible conversion sodium-ion batteries

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