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communications in Theoretical Physics 2020年第2期72卷 23-29页

作者： G Sowmya b J Gireesha S Sindhu b.c prasannakumara Department of PG Studies and Research in Mathematics Kuvempu UniversityShankaraghatta-577451KarnatakaIndia Department of Mathematics Davangere UniversityDavangere-577002KarnatakaIndia

The thermal attributes of porous fin due to radiation and natural convection have been carried out in the presence of nanofluid *** geometry of the fin taken for the analysis is rectangular profiled longitudinal *** temperature-dependent internal heat generation condition is also considered along with Darcy’s *** two types of nanofluid containing titanium alloy(Ti6Al4V)and aluminium alloy(AA7075)immersed in water is considered for the *** modelled nonlinear ordinary differential equation is numerically solved by the Runge–Kutta–Fehlberg *** impact of geometric parameter on the heat transfer analysis of the fin due to the flow of both nanofluids is plotted and consequences are physically *** is observed that the presence of the water-based titanium alloy better enhances the fin heat transfer rate.

关键词： alloys nanofluid porous fin heat transfer analysis convective condition internal heat generation

Significance of Stefan blowing effect on flow and heat transfer of casson nanofluid over a moving thin needle

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communications in Theoretical Physics 2021年第9期73卷 51-58页

作者： A M Jyothi R Naveen Kumar R J Punith Gowda b.c prasannakumara bangalore Institute of Technology BangaloreIndia Department of Studies and Research in Mathematics Davangere UniversityDavangere-577002KarnatakaIndia

The current mathematical model explains the influence of non-linear thermal radiation on the casson liquid flow over a moving thin needle by considering buongiorno’s nanofluid *** influences of Stefan blowing,Dufour and Soret effects are also considered in the *** equations which represent the described flow pattern are reduced to ordinary differential equations(ODEs)by using apt similarity transformations and then they are numerically solved with Runge–Kutta-Fehlberg’s fourth fifth-order method(RKF-45)with shooting *** impacts of pertinent parameters on thermal,mass and velocity curves are deliberated *** friction,rate of heat and mass transfer are also discussed *** reveal that,the increase in values of brownian motion,thermophoresis,Dufour number,heating and radiative parameters improves the heat *** increasing values of the Schmidt number deteriorates the mass transfer but a converse trend is seen for increasing values of the Soret ***,the escalating values of the radiative parameter decays the rate of heat transfer.

关键词： moving thin needle brownian motion and thermophoretic diffusion non-linear thermal radiation Stefan blowing condition

Magnetohydrodynamic flow and heat transfer of a hybrid nanofluid over a rotating disk by considering Arrhenius energy

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communications in Theoretical Physics 2021年第4期73卷 9-20页

作者： M Gnaneswara Reddy Naveen Kumar R b.c prasannakumara N G Rudraswamy K Ganesh Kumar Department of Mathematics Acharya Nagarjuna University CampusOngole-523001India Department of Studies and Research in Mathematics Davangere UniversityShivagangothriDavangere-577007KarnatakaIndia Department of Mathematics P.C.Jabin Science CollageHubballi-580031India

This research work explores the effect of hybrid nanoparticles on the flow over a rotating disk by using an activation energy ***,we considered molybdenum disulfide and ferro sulfate as nanoparticles suspended in base fluid *** magnetic field is pragmatic normal to the hybrid nanofluid flow *** derived nonlinear ordinary differential equations are non-dimensionalized and worked out numerically with the help of Maple software by the RKF-45 *** scientific results for a non-dimensionalized equation are presented for both nanoparticle and hybrid nanoparticle *** of various predominant restrictions on flow and thermal fields are *** estimation for friction factor,local Nusselt number and Sherwood number are also *** reveal that the reduction of the heat transfer rate is greater in hybrid nanoparticles when compared to nanoparticles for increasing values of Eckert Number and the thermal field enhances for the enhanced values of volume fraction.

关键词： porous medium MHD hybrid nanoparticles activation energy

bioconvective nanofluid flow over an exponential stretched sheet with thermophoretic particle deposition

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Propulsion and Power Research 2023年第2期12卷 284-296页

作者： b.c.prasannakumara J.K.Madhukesh G.K.Ramesh Department of Studies in Mathematics Davangere UniversityDavangereKarnataka 577002India Department of Mathematics K.L.E.Society’s J.T.CollegeGadagKarnataka 582101India Department of Mathematics Amrita School of EngineeringAmrita Vishwa VidyapeethamBengaluruIndia

The current work is being done to investigate the flow of nanofluids across a porous exponential stretching surface in the presence of a heat source/sink,thermophoretic particle deposition,and *** collection of PDEs(partial differential equations)that represent the fluid moment is converted to a system of ODEs(ordinary differential equations)with the use of suitable similarity variables,and these equations are then numerically solved using Runge Kutta Fehlberg and the shooting *** different physical limitations,the numerical results are visually *** results show that increasing the porosity characteristics reduces *** mass transfer decreases as the thermophoretic limitation *** in the porosity parameter reduce skin friction,increases in the solid volume fraction improve the rate of thermal distribution,and increases in the thermophoretic parameter increase the rate of mass transfer.

关键词： Exponential stretching sheet Nanofluid Heat source/sink Thermophoretic particle deposition bio convection

bio-Marangoni convection flow of casson nanoliquid through a porous medium in the presence of chemically reactive activation energy

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Applied Mathematics and Mechanics(English Edition) 2021年第8期42卷 1191-1204页

作者： J.K.MADHUKESH G.K.RAMESH b.c.prasannakumara S.A.SHEHZAD F.M.AbbASI Department of Mathematics Davangere UniversityDavangere 577007India Department of Mathematics K.L.E.Society’s J.T.CollegeGadag 582101India Department of Mathematics COMSATS University IslamabadSahiwal 57000Pakistan

bioconvection research is primarily focused on the augmentation of energy and mass species,which has implications in the processes intensification,mechanical,civil,electronics,and chemical engineering *** bioconvection technology sectors include cooling systems for electronic devices,building insulation,and geothermal nuclear waste ***,the present investigation is mainly discoursing the impact of Marangoni convention casson nanoliquid flow under gyrotactic microorganisms over the porous *** partial differential equations(PDEs)are re-structured into ordinary differential equations(ODEs)via suitable similar *** ODEs are numerically solved with the help of the spectral relaxation method(SRM).The numerical outcomes are illustrated graphically for various parameters over velocity,temperature,concentration,and bioconvection ***-dimensional(3 D)views of important engineering parameters are illustrated for various *** velocity of the casson nanoliquid increases with increasing the Marangoni parameter but decreases against higher porosity *** surface drag force enhances for enhancement in the Marangoni *** rate of mass transmission is higher for reaction rate constraint but diminishes for activation energy *** higher radiative values augment the rate of heat transmission.

关键词： casson nanofluid activation energy thermal radiation bioconvection Marangoni convection

Radiative heat transfer analysis of a concave porous fin under the local thermal non-equilibrium condition:application of the clique polynomial method and physics-informed neural networks

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Applied Mathematics and Mechanics(English Edition) 2024年第9期45卷 1613-1632页

作者： K.cHANDAN K.KARTHIK K.V.NAGARAJA b.c.prasannakumara R.S.VARUN KUMAR T.MUHAMMAD Amrita School of Artificial Intelligence Amrita Vishwa VidyapeethamBengaluru 560035KarnatakaIndia Department of Studies in Mathematics Davangere UniversityDavangere 577002KarnatakaIndia computational Science Lab Amrita School of EngineeringAmrita Vishwa VidyapeethamBengaluru 560035KarnatakaIndia Department of Pure and Applied Mathematics School of Mathematical SciencesSunway UniversityPetaling Jaya 47500Malaysia Department of Mathematics College of ScienceKing Khalid UniversityAbha 61413Saudi Arabia

The heat transfer through a concave permeable fin is analyzed by the local thermal non-equilibrium(LTNE)*** governing dimensional temperature equations for the solid and fluid phases of the porous extended surface are modeled,and then are nondimensionalized by suitable dimensionless ***,the obtained nondimensional equations are solved by the clique polynomial method(cPM).The effects of several dimensionless parameters on the fin's thermal profiles are shown by graphical ***,the current study implements deep neural structures to solve physics-governed coupled equations,and the best-suited hyperparameters are attained by comparison with various network *** results of the cPM and physicsinformed neural network(PINN)exhibit good agreement,signifying that both methods effectively solve the thermal modeling problem.

关键词： heat transfer fin porous fin local thermal non-equilibrium(LTNE)model physics-informed neural network(PINN)

Acquired sensorineural hearing loss,oxidative stress,and microRNAs

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Neural Regeneration Research 2025年第9期20卷 2513-2519页

作者： Desmond A.Nunez Ru c.Guo Division of Otolaryngology–Head&Neck Surgery Department of SurgeryFaculty of MedicineThe University of British ColumbiaVancouverBCCanada Division of Otolaryngology–Head&Neck Surgery Gordon&Leslie Diamond Health Care CentreVancouver General HospitalVancouverBCCanada Faculty of Medicine–The University of british columbia VancouverBCCanada

Hearing loss is the third leading cause of human ***-related hearing loss,one type of acquired sensorineural hearing loss,is largely responsible for this escalating global health ***-induced,ototoxic,and idiopathic sudden sensorineural are other less common types of acquired hearing *** etiology of these conditions is complex and multi-fa ctorial involving an interplay of genetic and environmental *** stress has recently been proposed as a likely linking cause in most types of acquired sensorineural hearing *** non-coding RNA sequences known as microRNAs(miRNAs)have increasingly been shown to play a role in cellular hypoxia and oxidative stress responses including promoting an apoptotic *** hair cell death is a central histopathological finding in sensorineural hearing *** these cells do not regenerate in humans,it underlies the irreversibility of human age-related hearing *** EMbASE,Ovid MEDLINE,Web of Science core collection,and *** databases over the period August 1,2018 to July 31,2023 were searched with"hearing loss,""hypoxamiRs,""hypoxia,""microRNAs,""ischemia,"and"oxidative stress"text words for English language primary study publications or registered clinical *** red clinical trials known to the senior author we re also assessed.A total of 222studies were thus *** excluding duplicates,editorials,retra ctions,secondary research studies,and non-English language articles,39 primary studies and clinical trials underwent full-text *** resulted in 11 animal,in vitro,and/or human subject journal articles and 8 registered clinical trial database entries which form the basis of this narrative *** miR-34a and miR-29b levels increase with age in *** miRNAs were demonstrated in human neuroblastoma and murine cochlear cell lines to target Sirtuin 1/peroxisome proliferato r-activated receptor gamma coactivator-1-alpha(SIRT1/P Gc-1α),SIRT

关键词： hearing loss hypoxia microRNAs oxidative stress sensorineural

Lowering the cost of large-scale energy storage:High temperature adiabatic compressed air energy storage

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Propulsion and Power Research 2017年第2期6卷 126-133页

作者： b.cárdenas A.J.Pimm b.Kantharaj M.c.Simpson J.A.Garvey S.D.Garvey Department of Mechanical.Materials and Manufacturing Engineering Faculty of Engineering.University of Nottingham.Nottingham NG72RD United Kingdom centre for Integrated Energy Research School of Chemical and Process Engineering.University of Leeds.Leeds LS29DTUnited Kingdom School of Mechanical Engineering University of LeedsLeeds LS29DTUnited Kingdom

compressed air energy storage is an energy storage technology with strong potential to play a significant role in balancing energy on transmission networks,owing to its use of mature technologies and low cost per unit of storage *** compressed air energy storage(A-cAES)systems typically compress air from ambient temperature in the charge phase and expand the air b.ck to ambient temperature in the discharge *** papers explores the use of an innovative operating scheme for an A-cAES system aimed at lowering the total cost of the system for a given exergy storage *** configuration proposed considers preheating of the air before compression which increases the fraction of the total exergy that is stored in the fom of high-grade heat in comparison to existing designs in which the main exergy storage medium is the compressed air *** a high fraction of the total exergy as heat allows reducing the capacity of costly pressure stores in the system and replacing it with cheaper thermal energy ***,a configuration that integrates a system based on the aforementioned concept with solar thermal power or low-medium grade waste heat is introduced and thoroughly discussed.

关键词： High temperature compressed air energy storage(cAES) Preheating of air Generation integrated energy storage Electric grid balancing Electricity storage Renewable generation intermittence

Impact of radiation,melting,and chemical reaction on magnetohydrodynamics nanoparticle aggregation flow across parallel plates

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Journal of central South University 2024年第10期31卷 3715-3729页

作者： Ram Prakash SHARMA J.K.MADHUKESH Sunendra SHUKLA Amal AbDULRAHMAN b.c.prasannakumara K.V.NAGARAJA Department of Mechanical Engineering National Institute of Technology Arunachal PradeshJotePapum Pare DistrictArunachal Pradesh 791113India Department of Mathematics GM UniversityDavangereKarnataka 577006India Department of chemistry College of ScienceKing Khalid UniversityAbha 61421Saudi Arabia Department of Studies and Research in Mathematics Davangere UniversityDavangereKarnataka 577002India computational Science Lab Amrita School of EngineeringAmrita Vishwa VidyapeethamBengaluruIndia

The heat transfer between two corresponding plates,disks,and concentric pipes has many applications,including water cleansing and ***,TiO_(2)-water-based nanofluids are used widely b.cause it is useful for operating and controlling the temperature,especially in photovoltaic technology and solar *** by these applications,the current study is based on the nanoparticle aggregation effect on magnetohydrodynamics(MHD)flow via rotating parallel plates with the chemical *** achieve maximum heat transportation,the bruggeman model is used to adapt the Maxwell ***,melting and thermal radiation effects are considered in the modeling to discuss heat *** Runge-Kutta-Fehlberg 4th−5th order method is used to attain numerical *** main focus of this study is to see the thermodynamic behavior considering several aspects of nanoparticle *** heat transfer rate between the parallel plates is enhanced by improving the thermophoresis,radiation,and brownian motion *** rise in Schmidt number and chemical reaction rate parameter decreases the concentration *** study will be helpful in enhancing the thermal efficiency of photovoltaic technology in solar plates,water purifying,thermal management of electronic devices,designing effective cooling systems,and other sustainable technologies.

关键词： nanoparticle aggregation thermal radiation parallel plates magnetic field chemical reaction

植物系统发生海报——以演化视角介绍植物多样性的科教资料项目

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生物多样性 2025年

作者：蒋陈焜郁文彬饶广远黎怀成 Julien b.b.chelier Hartmut H.Hilger Theodor c.H.cole 北京大学生命科学学院蛋白质与植物基因研究国家重点实验室北京大学前沿交叉学科研究院北京大学-清华大学生命科学联合中心中国科学院西双版纳热带植物园综合保护中心/云南省热带雨林与亚洲象保护重点实验室 Dahlem centre of Plant Sciences (DcPS)， Institute of biology， Structural and Functional Plant Diversity， Freie Universit?t berlin

中国的植物多样性保护行动虽然提升了公众对多样性的认识，但这些努力往往未能深入到理解植物多样性演化及其保护的深层意义。从演化的视角进行植物多样性宣传教育，有利于促进对多样性的综合理解，增进对多样性保护的认可。然而， ... 详细信息

中国的植物多样性保护行动虽然提升了公众对多样性的认识，但这些努力往往未能深入到理解植物多样性演化及其保护的深层意义。从演化的视角进行植物多样性宣传教育，有利于促进对多样性的综合理解，增进对多样性保护的认可。然而，现有资料多集中于物种的识别、鉴定与分类，缺乏从生物演化角度对植物多样性进行系统性介绍的内容。本文介绍了一个具有全球影响力的科教资料案例——由美裔德国植物学家Theodor c. H. cole发起的植物系统发生海报(Plant Phylogeny Posters)项目。该项目通过整合最新的系统与演化植物学研究成果，以系统发生为线索介绍植物多样性及其亲缘关系，旨在利用系统发生树所蕴含的丰富演化思想内涵，启发读者理解植物多样性与演化。海报以系统发生树结合植物类群的形态、地理分布、物种数量等数据信息，直观展示了多个分类等级的重要类群的演化历史。在数十所大学和科研机构的45位研究人员的努力下， 70张系统发生海报已被翻译成中文，并向所有人免费开放获取。这一科教项目有望为增进公众深入理解植物多样性及其保护行动提供宝贵的资源和帮助。

关键词：植物多样性演化系统发生科教资料