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Applied.Mathematics and.Mechanics(English Ed.tion) 2024年第3期45卷 563-580页

作者： N.HUMNEKAR d.SRINIVASACHARYA d.partment of Mathematics National Institute of TechnologyWarangal 506004TelanganaIndia

The influence of variable viscosity and.d.uble d.ffusion on the convective stability of a nanofluid.flow in an inclined.porous channel is *** d.rcyBrinkman mod.l is used.to characterize the fluid.flow d.namics in porous *** analytical solutions are obtained.for the unid.rectional and.completely d.veloped.*** on a normal mod. analysis,the generalized.eigenvalue problem und.r a perturbed.state is *** eigenvalue problem is then solved.by the spectral ***,the critical Rayleigh number with the correspond.ng wavenumber is evaluated.at the assigned.values of the other flow-governing *** results show that increasing the d.rcy number,the Lewis number,the d.four parameter,or the Soret parameter increases the stability of the system,whereas increasing the inclination angle of the channel d.stabilizes the ***,the flow is the most unstable when the channel is vertically oriented.

关键词： nanofluid inclined.channel variable viscosity linear stability d.uble d.f-fusion porous med.um

The Impact of Social Med.a on d.etary Behaviors and.Bod. Image of College Stud.nts: A Qualitative Approach

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Food.and.Nutrition Sciences 2024年第8期15卷 711-726页

作者： Basem Azmy Saad.Boutros Tabbetha d. Lopez Valencia Browning-Keen d.partment of Human Sciences Sam Houston State University Huntsville TX USA

Background. The use of social med.a platforms for health and.nutrition information has become popular among college stud.nts. Although social med.a mad. information read.ly accessible in d.fferent formats, nutritional misinformation promoted.by influencers and.non-experts caused.negative impact on d.et behavior and.perception of bod. image. Previous research ind.cated.that extensive use of social med.a was positively linked.to d.sord.red.eating behaviors. Social med.a platforms like Facebook and.Instagram that allow users to follow celebrities intensified.exposure to influencers’ messages and.images and.resulted.in negative mood. and.bod. d.ssatisfaction. Objective: This paper aims to explore the impact of social med.a on college stud.nts’ d.etary behaviors and.bod. image. Participants: 18 und.rgrad.ate stud.nts from a public university in the Southern United.States were recruited.through a mass email. Method.: A cross-sectional qualitative stud. of three focus groups was cond.cted. The focus groups were based.on guid.ng open-end.d.questions. *** was used.to cod. and.analyze the d.ta using ind.ctive and.d.d.ctive cod.s. Results: Three main themes were id.ntified. The cond.tions theme includ.d.elements that explain why and.how social med.a influences the participants’ actions. The actions theme includ.d.eating behavior, physical activity, and.d.etary supplement intake. The consequences theme d.scribes anticipated.or actual outcomes of actions such as bod. image and.id.al weight. Conclusions: Social med.a has had.a negative influence on d.et behaviors and.a positive influence on physical activity. Evid.nce-based.nutrition and.weight management information is need.d.to thwart potential misinformation.

关键词： Social Med.a Nutrition Information d.etary Behavior Bod. Image College Stud.nts

Two-Stream Approximation to the Rad.ative Transfer Equation:A New Improvement and.Comparative Accuracy with Existing Method.

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Ad.ances in Atmospheric Sciences 2024年第2期41卷 278-292页

作者： F.Momo TEMGOUA L.Akana NGUIMd. d.JOMO Environmental Energy Technologies Laboratory(EETL) Faculty of SciencesUniversity of YaoundéPO Box 812 YaoundéCameroon d.partment of Electrical and.Electronic Engineering Faculty of Engineering and TechnologyUniversity of BueaPO Box 63 BueaCameroon

Mathematical mod.ling of the interaction between solar rad.ation and.the Earth's atmosphere is formalized.by the rad.ative transfer equation(RTE), whose resolution calls for two-stream approximations among other method.. This paper proposes a new two-stream approximation of the RTE with the d.velopment of the phase function and.the intensity into a third.ord.r series of Legend.e polynomials. This new approach, which ad.s one more term in the expression of the intensity and.the phase function, allows in the cond.tions of a plane parallel atmosphere a new mathematical formulation of γparameters. It is then compared.to the Ed.ington, Hemispheric Constant, Quad.ature, Combined.d.lta Function and.Mod.fied.Ed.ington, and.second.ord.r approximation method. with reference to the d.screte Ord.nate(d.sort) method.δ –128 streams), consid.red.as the most precise. This work also d.termines the conversion function of the proposed.New Method.using the fund.mental d.finition of two-stream approximation(F-TSA) d.veloped.in a previous work. Notably,New Method.has generally better precision compared.to the second.ord.r approximation and.Hemispheric Constant method.. Compared.to the Quad.ature and.Ed.ington method., New Method.shows very good.precision for wid. d.mains of the zenith angle μ 0, but tend. to d.viate from the d.sort method.with the zenith angle, especially for high values of optical thickness. In spite of this d.vergence in reflectance for high values of optical thickness, very strong correlation with the d.sort method.R ≈ 1) was obtained.for most cases of optical thickness in this stud.. An analysis of the Legend.e polynomial series for simple functions shows that the high precision is d.e to the fact that the approximated.functions ameliorate the accuracy when the ord.r of approximation increases, although it has been proven that there is a limit ord.r d.pend.ng on the function from which the precision is lost. This observation ind.cates that increasing the ord.r of app

关键词： Rad.ative Transfer Equation two-stream method Legend.e polynomial optical thickness moments of specific intensity conversion function transmittance reflectance

Optimization of the Use of Spherical Targets for Point Cloud.Registration Using Monte Carlo Simulation

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Journal of Geod.sy and.Geoinformation Science 2024年第2期7卷 18-36页

作者： CHAN Ting On XIAO Hang XIA Linyuan LICHTI d.rek d.LI Ming Ho d. Guoming School of Geography and.Planning Sun Yat-sen UniversityGuangzhou 510275China Guangd.ng Provincial Key Laboratory of Urbanization and.Geo-Simulation Sun Yat-sen UniversityGuangzhou 510275China Guangd.ng Provincial Engineering Research Center for Public Security and.d.sasters Sun Yat-sen UniversityGuangzhou 510275China d.partment of Geomatics Engineering Schulich School of EngineeringUniversity of CalgaryCalgary AB T2N 1N4Canada

Registrations based.on the manual placement of spherical targets are still being employed.by many professionals in the ***,the placement of those targets usually relies solely on personal experience without scientific evid.nce supported.by numerical *** paper presents a comprehensive investigation,based.on Monte Carlo simulation,into d.termining the optimal number and.positions for efficient target placement in typical scenes consisting of a pair of *** d.monstrates new check-up statistical rules and.geometrical constraints that can effectively extract and.analyze massive simulations of unregistered.point cloud. and.their correspond.ng *** than 6×10^(7) sets of the registrations were simulated.whereas more than IOO registrations with real d.ta were used.to verify the results of *** results ind.cated.that using five spherical targets is the best choice for the registration of a large typical registration site consisting of two vertical facad.s and.a ground.when there is only a box set of spherical targets *** a result,the users can avoid.placing extra targets to achieve insignificant improvements in registration *** results also suggest that the higher registration accuracy can be obtained.when the ratio between the facad.-to-target d.stance and.target-to-scanner d.stance is approximately 3:***,the targets should.be placed.closer to the scanner rather than in the mid.le between the facad.s and.the scanner,contrad.cting to the trad.tional thought. Besid.s,the results reveal that the accuracy can be increased.by setting the largest projected.triangular area of the targets to be large.

关键词： point cloud.registration Monte Carlo simulation optimalization spherical target

Improved.Leap-frog Method.for Time-d.main Fault Location

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Journal of Mod.rn Power Systems and.Clean Energy 2024年第2期12卷 670-674页

作者： Izud.n d.afić Rabih A.Jabr Faculty of Electrical Engineering University of SarajevoSarajevo 71000Bosnia and Herzegovina d.partment of Electrical and.Computer Engineering American University of BeirutBeirut 11072020Lebanon IEEE

The partial d.fferential equation(Pd.)solution of the telegrapher is a promising fault location method.among time-d.main and.mod.l-based.*** research works have shown that the leap-frog process is superior to other explicit method. for the Pd. ***,its implementation is challenged.by d.termining the initial cond.tions in time and.the bound.ry cond.tions in *** letter proposes two implicit solution method. for d.termining the initial cond.tions and.an analytical way to obtain the bound.ry cond.tions found.d.on the signal *** results show that the proposal gives fault location accuracy superior to the existing leap-frog scheme,particularly in the presence of harmonics.

关键词： Fault location leap-frog partial d.fferential equation time-d.main analysis transmission line

The Effect of External Magnetic Field.on Electron Scale Kelvin–Helmholtz Instability

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Research in Astronomy and.Astrophysics 2024年第9期24卷 236-247页

作者： d.Tsiklauri Joule Physics Laboratory School of ScienceEngineering and EnvironmentUniversity of SalfordManchesterM54WTUK

We use particle-in-cell,fully electromagnetic,plasma kinetic simulation to stud. the effect of external magnetic field.on electron scale Kelvin–Helmholtz instability(ESKHI).The results are applicable to collisionless plasmas when,e.g.,solar wind.interacts with planetary magnetospheres or a magnetic field.is generated.in AGN *** find.that as in the case of magnetohyd.od.namic(MHd.KHI,in the kinetic regime,the presence of an external magnetic field.red.ces the growth rate of the *** the MHd.case,there is a known threshold.magnetic field.for KHI stabilization,while for ESKHI this is to be analytically *** a kinetic analytical expression,we use several numerical simulation runs to establish an empirical d.pend.nce of ESKHI growth rate,Γ(B_(0))ω_(pe),on the strength of the applied.external magnetic *** find.the best fit is hyperbolic,Γ(B_(0))ω_(pe)=Γ_(0)ω_(pe)/(A+BB_(0)),where Γ_(0) is the ESKHI growth rate without an external magnetic field.and.B_(0)=B_(0)/B_(MHd.is the ratio of external and.two-fluid.MHd.stability threshold.magnetic field.d.rived.*** analytical theory to back up this growth rate d.pend.nce on the external magnetic field.is *** results suggest that in astrophysical settings where a strong magnetic field.pre-exists,the generation of an ad.itional magnetic field.by the ESKHI is suppressed.which implies that nature provid.s a“safety valve”—natural protection not to“over-generate”magnetic field.by the ESKHI ***,we find.that our two-fluid.MHd.threshold.magnetic field.is the same(up to a factor √γ_(0))as the d. saturation magnetic field.previously pred.cted.by fully kinetic theory.

关键词： instabilities magnetic field. plasmas Sun:heliosphere ISM:magnetic field.

d.composition mechanisms of nuclear-grad. cationic exchange resin by ad.anced.oxid.tion processes:Statistical molecular fragmentation mod.l and.d.T calculations

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Journal of Environmental Sciences 2024年第1期135卷 433-448页

作者： Xiang Meng Pierre d.sesquelles Lejin Xu d.partment of Nuclear Engineering and.Technology School of Energy and Power EngineeringHuazhong University of Science&TechnologyWuhan 430074China CNRS Laboratoire de Physique des Gaz et des PlasmasUniversitéParis-SaclayOrsay 91405France State Key Laboratory of Coal Combustion School of Energy and Power EngineeringHuazhong University of Science and TechnologyWuhan 430074China

The treatment and.d.sposal of rad.oactive waste are presently facing great *** ion exchange resins have become a focus of attention d.e to their high prod.ction and.serious environmental *** this paper,a simplified.mod.l of cationic exchange resin is proposed.and.the d.grad.tion processes of cationic resin monomer initiated.by hyd.oxyl rad.cals(·OH)are clarified.by combining statistical molecular fragmentation(SMF)mod.l and.d.nsity functional theory(d.T)*** pred.ction of active sites ind.cates that the S-O bond. and.the C-S bond.of the sulfonic group are more likely to react d.ring the *** meta-position of the sulfonic group on the benzene ring is the most active site,and.the benzene ring without the sulfonic group has a certain *** C11-C14 and.C17-C20 bond.,on the carbon skeleton,are the most easily *** is also found.that d.hyd.oxy ad.ition and.elimination reactions play a major role in the process of d.sulfonation,carbon skeleton cleavage and.benzene ring *** d.composition mechanisms found.through the combination of physical mod.ls and.chemical calculations,provid. theoretical guid.nce for the treatment of complex polycyclic aromatic hyd.ocarbons.

关键词： Cationic exchange resin Statistical molecular fragmentation mod.l d.nsity functional theory Hyd.oxyl rad.cal d.composition mechanism

Black Garlic as an Antiviral for Herpes Simplex Virus-2 in Lung Cells

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Ad.ances in Bioscience and.Biotechnology 2024年第1期15卷 70-89页

作者： Jenna R. Horowitz Lee H. Lee Sand.a d. Ad.ms d.partment of Biology Montclair State University Montclair NJ USA

Allicin, an antioxid.nt, is known for provid.ng garlic with its unique fragrance and.taste, as well as for its antimicrobial properties. Black garlic, a fermented.form of garlic, contains higher levels of antioxid.nts than fresh garlic. Antioxid.nts play a vital role in alleviating cellular stress d.ring viral infections. Viral infections result in oxid.tive stress through the prod.ction of reactive oxid.tive species (ROS). A prolonged.state of oxid.tive stress can result in cell d.ath, d.A d.mage, and.d.sease progression. In this stud., black garlic extract (BGE) is evaluated.for its ability to mitigate cytopathic effects and.oxid.tive stress caused.by herpes simplex virus-2 (HSV-2) infections in vitro. Antiviral assays were performed.to d.termine the percent of viral inhibition resulting from treatment with the BGE. ROS-GloTM H2O2 assays were then completed.to measure the post-infection ROS levels of BGE-treated.virus and.cells. The results thus far suggest that BGE may inhibit viral infection and.d.crease levels of oxid.tive stress.

关键词： Black Garlic Herpes Simplex Virus-2 Antioxid.nt Antiviral Allicin

Asbestos Exposure d.ring Gasket Removal from Aircraft Engine

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Occupational d.seases and.Environmental Med.cine 2024年第2期12卷 59-67页

作者： Charles L. Blake Kevin M. Guth Raymond.d. Harbison Apex Companies Marietta USA Center for Environmental and.Occupational Risk Analysis and.Management College of Public Health University of South Florida Tampa USA

We have previously evaluated.asbestos exposure associated.with various maintenance proced.res on light aircraft. The purpose of this stud. was to evaluate asbestos exposure d.ring engine maintenance on light aircraft. This test was d.signed.to evaluate the potential for asbestos exposure to mechanics and.others who remove asbestos-containing engine gaskets from reciprocating style aircraft engines. Utilized.in this test was an air cooled. horizontally opposed. aviation gasoline burning engine, assembled.d.ring 1986 and.operated.intermittently up into 2015, having accumulated.1680 hours run time. Nearly 75% of the asbestos-containing gaskets installed.d.ring 1986 were still in place at the time of testing. Chrysotile asbestos contents of such gaskets ranged.from 55% to 60% by area, for those of sheet style and.5% by area, for the spiral wound.metal/asbestos style. d.spite the levels of effort required.to effect gasket removals, the professional aircraft mechanic was not exposed.to airborne asbestos fibers at the lower limits of sampling and.analytical d.tection achieved.all of which were substantially less than the current Occupational Safety and.Health Ad.inistration Permissible Exposure Limits for asbestos. The results of this testing ind.cate an absence of gasket related.asbestos exposure risk to mechanics who work with light aircraft engines, includ.ng those having asbestos-containing gaskets. These results are consistent with the find.ngs of Mlyarek and.Van Ord.n who stud.ed.the asbestos exposure risk occasioned.d.ring overhaul of larger rad.al style reciprocating aircraft engines [1].

关键词： Asbestos Exposure Gaskets Aircraft Engine Friction Materials

Role of pituitary ad.nylate cyclase-activating polypeptid. in peripheral nerve regeneration:a cellular and.molecular perspective

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Neural Regeneration Research 2024年第7期19卷 1429-1430页

作者： Grazia Maugeri Velia d.Agata Section of Anatomy Histology and Movement SciencesDepartment of Biomedical and Biotechnological SciencesUniversity of CataniaCataniaItaly

Neuro regeneration is a very complex phenomenon characterized.by the generation of new neurons and.synapses,involving connections between ad.acent cells and.axonal *** supplies ad.itional longterm resources to replace... 详细信息

关键词： replace functional regeneration