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Neural Regeneration Research 2024年第9期19卷 1908-1918页

作者： Marcello Serra Nicola Simola a.exia.e.Pollack Giulia Costa Department of Biomedical Sciences Section of NeuroscienceUniversity of CagliariCagliariItaly Department of Biology University of Massachusetts-BostonBostonMAUSA

Preclinical and clinical studies indica.e that psychostimulants,in addition to having abuse potential,may elicit brain dysfunctions and/or neurotoxic *** toxicity induced by psychostimulants may pose serious health risks since the recreational use of these substances is on the rise among young people and *** present review provides an overview of recent research,conducted between 2018 and 2023,focusing on brain dysfunctions and neurotoxic effects elicited in experimental models and humans by amphetamine,cocaine,methamphetamine,3,4-methylenedioxymethamphetamine,methylphenida.e,caffeine,and *** elucidation of factors and mechanisms that underlie psychostimulant-induced brain dysfunction and neurotoxicity is crucial for understanding the acute and enduring noxious brain effects that may occur in individuals who use psychostimulants for recreational and/or thera.eutic purposes.

关键词： 3,4-methylenedioxymethamphetamine amphetamine caffeine cell cultures cocaine methamphetamine methylphenida.e neurotoxicity nicotine

A novel method for modeling the pha.e change of iron ore particles in the cohesive zone of a blast furna.e

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Particuology 2024年第3期86卷 252-261页

作者： Dianyu e Yingming Wen Jiayun Dan Youyuan Jiang Guangchao Wei Jiaxin Cui Jiangxi Provincial Key Laboratory for Simulation and Modelling of Particula.e Systems Jiangxi University of Science and TechnologyNanchang330013China International Institute for Innovation Jiangxi University of Science and TechnologyNanchang330013China Ironmaking Plant Xiangtan Iron and Steel Corporation of Hunan HualingXiangtan411101China Schoolof Transportation and Vehicle enginering Shandong University of TechnologyZibo255000China

Cohesive zone plays a vital role in the stable operation of a blast furna.e(BF),yet the complex pha.e change process of iron ore particles in this zone is still not well *** this study,a novel one-dimensional(1D)unsteady pha.e change model was developed to elucida.e the heat transfer and melting mechanisms of iron ore *** model validation,the effects of several key operating para.eters(e.g.,particle dia.eter,gas velocity,initial temperature)on the pha.e change behavior of iron ore particles were analyzed,and the joint effect of multiple para.eters was *** results show that larger-sized iron ore particles possess lower specific surfa.e a.eas,which in turn reduces their convective heat absorption ***,the distance from the solid-liquid pha.e interfa.e to the particle surfa.e increa.es,thereby slowing down the movement of the pha.e interfa.e and pro-longing the melting duration of the *** the gas velocity and the initial temperature does not ha.e a significant impact on reducing the duration of the complete melting *** the specified conditions,it is observed that increasing the gas velocity by 3-fold and 9-fold results in a reduction of the melting duration by 2.4%and 8.3%,*** the initial temperature of iron ore particles results in a decrea.e in the core-to-surfa.e temperature difference,a slower heating ra.e,and a shorter duration to achieve *** the factors affecting the melting process,the particle dia.eter is found to be the most significant in terms of the liquid pha.e precipitation,mushy zone thickness,and core-to-surfa.e temperature difference of iron ore particles.

关键词： Blast furna.e Iron ore melting Cohesive zone Heat transfer Pha.e change

Cavitation research with computational fluid dynamics:From euler-euler to euler-Lagrange approach

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Journal of Hydrodynamics 2024年第1期36卷 1-23页

作者： Bin Ji Zi-yang Wang Huai-yu Cheng Rickard e.Bensow Sta.e Key Laboratory of Wa.er Resources engineering and Mana.ement Wuhan UniversityWuhan430072China Department of Mechanics and Maritime Sciences Chalmers University of TechnologyGothenburgSweden

Unsteady cavitating flow often contains vapor structures with a wide range of different length sca.es,from micro-bubbles to large cavities,which issues a big challenge to precisely investiga.e its evolution mechanism by computational fluid dynamics(CFD)*** present work reviews the development of simulation methods for cavitation,especially the emerging euler-Lagrange ***,the progress of the numerical investigation of hot and vital issues is discussed,including cavitation inception,cloud cavitation inner structure and its formation mechanism,cavitation erosion,and cavitation *** is indica.ed that the euler-Lagrange method can determine cavitation inception point *** cloud cavitation,the euler-Lagrange method can reveal the source of microbubbles and their distribution law inside the shedding *** method also has advanta.es and great potential in assessing cloud cavitation-induced erosion and *** the ever-growing demands of cavitation simulation accuracy in basic research and engineering applications,how to improve the euler-Lagrange method’s stability and applicability is still an open *** further promote the application of this advanced CFD simulation technology in cavitation research,some key issues a.e to be solved and feasible suggestions a.e put forward for further work.

关键词： numerical simulation euler-euler method euler-Lagrange method bubble dynamicsgy,Gothenburg,Sweden

Chromomagnetic dipole moments of light quarks in the bestest little Higgs model

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Chinese Physics C 2024年第10期48卷 125-136页

作者： T.Cisneros-Pérez e.Cruz-Albaro A.Y.Ojeda-Casta.eda S.e.Solís-Núñez Unidad Académica de Ciencias Químicas Universidad Autónoma de ZacatecasApartado Postal C-58598060 ZacatecasMexico Facultad de Física Universidad Autónoma de ZacatecasApartado Postal C-58098060 ZacatecasMexico

In this study,we investiga.ed the anomalous Chromomagnetic Dipole Moment(CMDM),denoted as μ_(q)^(BLHM),of light quarks q=(u,c,d,s,b) within the fra.ework of the Bestest Little Higgs Model(BLHM)as an extension of the Standard Model(SM).Our investigation encompassed novel interactions among the light quarks,heavy quark B,and heavy bosons (W'^(±),H^(±),φ^(±),η^(±))incorporating the extended Cabibbo-Kobayashi-Maskawa(CKM)matrix characteristic of the *** thoroughly explored the permissible para.eter spa.e,yielding a spectrum of CMDM values ranging from 10^(-10) to 10^(-3).

关键词： beyond standard model flavor physics chromomagnetic dipole light quarks

Pressurized environments directly influence friction and wear of dry steel contacts—Investigations in a novel high fluid pressure tribometer

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Friction 2024年第7期12卷 1599-1617页

作者： Paul ReICHLe Jakob BARZ Georg UMLAUF Günter e.M.TOVAR Institute of Interfacial Process engineering and Plasma Technology(IGVP) University of StuttgartStuttgart 70569Germany Fraunhofer Institute for Interfacial engineering and Biotechnology(IGB) Stuttgart 70569Germany

To reduce the usa.e of classical lubricants in deep drawing,a new tribological system ba.ed on volatile lubricants was ***,a volatile medium is injected under high pressure into the interstice between drawing tool and sheet *** on temperature and pressure,the temporary lubricant may exist in its ga.eous or liquid *** this study,a novel high fluid pressure tribometer was designed to investiga.e the friction and wear of dry steel contacts under comparable conditions like in dry deep ***,a new ball-on-disc tribometer was designed and integra.ed into a high-pressure *** specifically investiga.e the effects of different environments(technical air,liquid and ga.eous carbon dioxide,nitrogen,argon)at atmospheric and high pressure(0.1 MPa,6 MPa)on tribology,the specimens and all components were operating *** the experiments,the friction was measured *** show that the highest friction occurs in air and the lowest in carbon dioxide *** to the experiments,the wear of the specimens was assessed along with changes in surfa.e chemistry rela.ed to tribochemical ***,the tribology of the dry sliding contacts is correla.ed to changes of the surfa.e *** differences as well as similarities regarding the different fluid environments a.e *** the results show,the differences between the media used a.e most pronounced at eleva.ed ***,this work gives clear indications on the suitability of volatile lubricants in dry friction or rather gas lubrication,especially for dry deep drawing.

关键词： dry friction and dry wear gas lubrication carbon dioxide tribo-la.er dry metal forming

Translating Difference:Reflections on the Interfa.e between Novelistic Discourse and World Literature

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Journal of Foreign Langua.es and Cultures 2024年第1期8卷 16-30页

作者： e.V.RAMAKRISHNAN Central University of Gujarat

The present essay examines two moments from the evolution of the modern Malayalam novel,in relation to the reception of two classics in world literature,na.ely Victor Hugo's Les Miserables transla.ed into Malayalam between 1925 and 1927 and Garcia Marquez's One Hundred Years of Solitude transla.ed in *** translation of Hugo's novel energized the scene of Malayalam fiction by infusing new modes of representation and widening the intellectual horizons of writers in general,and novelists in *** echoes of Les Miserables could be heard in Malayalam fiction well into the *** struggles against colonial and feudal authorities in Kerala,provided a fertile context for the imaginative interpretation of Hugo's humanist *** pa.er illustra.es this point through close readings of critical essays,autobiographical narratives and deba.es on the nature of *** fascination of Malayali rea.ers with Garcia Marquez has resulted in the translation of his entire corpus into *** realism as pioneered by Garcia Marquez libera.ed the Malayalam novelistic narrative from social realist and modernist *** colonial disruption of oral narratives,the consequent cultural amnesia and the struggle to reclaim one's forgotten past a.e themes that struck a chord in Malayalam writers of *** a detailed discussion of the novel,Moustache by ***,the interfa.e between novelistic discourse and world literature is mapped in the latter part of the essay.

关键词： Malayalam literature translation difference world literature magic realism caste resistance

Burden of gallstone disea.e in the United Sta.es population:Prepandemic ra.es and trends

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World Journal of Gastrointestinal Surgery 2024年第4期16卷 1130-1148页

作者： Aynur Unalp-Arida Constance e Ruhl National Institute of Dia.etes and Digestive and Kidney Disea.es National Institutes of HealthBethesdaMD 20892-5458United States Social&Scientific Systems Inc.DLH Holdings Corp CompanySilver SpringMD 20910United States

BACKGROUND Gallstone disea.e is one of the most common digestive disorders in the United Sta.es and leads to significant morbidity,mortality,and health ca.e *** To expand on earlier findings and investiga.e prepandemic ra.es and trends in the gallstone disea.e burden in the United Sta.es using national survey and claims *** The National Ambulatory Medical Ca.e Survey,National Inpatient Sample,Nationwide emergency Department Sample,Nationwide Ambulatory Surgery Sample,Vital Statistics of the United Sta.es,Optum Clinformatics®Data Mart,and Centers for Medica.e and Medicaid Services Medica.e 5%Sample and Medicaid files were used to estima.e claims-ba.ed preva.ence,medical ca.e including cholecystectomy,and mortality with a primary or other gallstone *** were a.e-adjusted(for national databa.es)and shown per 100000 *** Gallstone disea.e preva.ence(claims-ba.ed,2019)was 0.70%among commercial insurance enrollees,1.03%among Medicaid beneficiaries,and 2.09%among Medica.e beneficiaries and rose over the previous ***,in the United Sta.es population,gallstone disea.e contributed to approxima.ely 2.2 million ambulatory ca.e visits,1.2 million emergency department visits,625000 hospital discharges,and 2000 deaths *** had higher medical ca.e ra.es with a gallstone disea.e diagnosis,but mortality ra.es were higher among *** had higher ambulatory ca.e visit and hospital discharge ra.es compa.ed with Whites,but not mortality *** had lower ambulatory ca.e visit and mortality ra.es,but similar hospital discharge ra.es compa.ed with *** the study period,ambulatory ca.e and emergency department visit ra.es with a gallstone disea.e diagnosis rose,while hospital discharge and mortality ra.es *** commercial insurance enrollees,ra.es were higher compa.ed with national data for ambulatory ca.e visits and hospitalizations,but lower for emergency department ***

关键词： Gallstone disea.e Burden Cholecystectomy Mortality Health ca.e use Cholelithiasis Gallstones epidemiology

High seed losses in mountain birch(Betula pubescens ***)and developmental,ecological,and environmental correla.es

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Journal of Plant ecology 2024年第4期17卷 56-69页

作者： Guorun Oskarsdottir Thora.e.Thorhallsdottir Kristin Svavarsdottir University of Iceland 102 ReykjavíkIceland Land and Forest Iceland ReykjavíkIceland

Plants typically experience great losses from their reproductive potential represented by ovule production to the post-dispersal crop of viable *** examined seed density and viability in a founder population of mountain birch(Betula pubescens ***),aiming to quantify losses at different sta.es and examine potential selection forces on the reproduction success of the founder generation of an isola.ed *** the time of the study(2017-2020),the population had recently reached reproductive maturity,following its colonization around 1990 through long-distance dispersal onto an early successional outwash plain in southeast *** densities were high,but 89% of appa.ently intact seeds did not contain an embryo,despite being visually indistinguishable from filled *** evident losses amounted to about 45% of the total seed crop and were mostly due to predation by the gall midge Semudobia *** all losses were accounted for,2.7% of the seed crop remained viable and *** limitation may partially explain the high incidence of empty *** flower production is compatible with the predator satiation hypothesis but cannot explain pre-dispersal *** adaptation to predation,masting,appears poorly developed in *** results suggest the presence of constraints on the reproduction potential of the new island population,that a.e more limiting than in neighbouring populations,and we discuss their developmental,ecological,and environmental correla.es.

关键词： Betula pubescens ssp.tortuosa(Ledeb.)Nyman Iceland seed quality seed losses Semudobia betulae sub-arctic

Influence of Metha.e-Hydrogen Mixture Characteristics on Compressor Vibrations

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Fluid Dynamics & Ma.erials Processing 2024年第5期20卷 1031-1043页

作者： Vladimir Ya.Modorskii Ivan e.Cherepanov High Performance Computing Center Perm National Research Polytechnic UniversityPerm614990Russia

A transition to clean hydrogen energy will not be possible until the issues rela.ed to its production, transportation,stora.e, etc., a.e a.equa.ely resolved. Currently, however, it is possible to use metha.e-hydrogen *** gas can be transported using a pipeline system with the required pressure being maintained by gascompression stations. This method, however, is affected by some problems too. Compressors emergency stopscan be induced by vibrations because in some ca.es, mechanical methods a.e not able to reduce the vibrationamplitude. As an example, it is known that a gas-dynamic flow effect in labyrinth seals can lead to increa.edvibrations. This pa.er presents the numerical simulation of rotor oscillations taking into account a gas-dynamicload. The influence of a transported mixture on the oscillatory process is investiga.ed. Mixtures consisting ofmetha.e and hydrogen in various proportions and an air mixture a.e considered. The results a.e discussed forvarious operating pressures and include the rotor motion tra.ectories and oscillation frequency spectra obtainednumerically. It is shown that the gas mixture composition has a significant effect on the oscillations and theiroccurrence. Hydrogen as a working fluid reduces the vibration amplitude. Operating a compressor with hydrogenleads to a decrea.e in the resonant frequency, bringing it closer to the operating one. However, the operatingpressure at which maximum oscillations a.e observed depends slightly on the gas mixture composition.

关键词： Seal stabilities vibration FSI CFD multipha.e flows hydrogen

Landau quantization effects on damping Kawahara solitons in electron–positron–ion plasma in rotating ionized medium

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Communications in Theoretical Physics 2024年第10期76卷 143-152页

作者： e I el-Awady S Hussain N Akhtar Department of Physics Faculty of Science Port Said University Theoretical Physics Division (TPD) PINSTECH

For the dynamics of three-dimensional electron–positron–ion plasmas, a fluid quantum hydrodynamic model is proposed by considering Landau quantization effects in dense ***–neutral collisions in the presence of the Coriolis force a.e also considered. The application of the reductive perturbation technique produces a wa.e evolution equation represented by a damped Korteweg–de Vries equation. This equation, however, is insufficient for describing wa.es in our system at very low dispersion coefficients. As a result, we considered the highest-order perturbation, which resulted in the damped Kawahara.equation. The effects of the magnetic field, Landau quantization, the ratio of positron density to electron density, the ratio of positron density to ion density, and the direction cosine on linear dispersion laws as well as soliton and conoidal solutions of the damped Kawahara.equation a.e explored. The understanding from this research can contribute to the broa.er field of astrophysics and aid in the interpretation of observational data from white dwarfs.

关键词： Coriolis force Kawahara.equation Landau quantization magnetoplasmas quantum plasma solitary and cnoidal wa.es