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Analys.s.of turbulent m.D Couette nanofluid flow and heat trans.er us.ng hybrid DTm.FDm

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Particuology 2016年第3期14卷 95-101页

作者： s. m.s.yebidorcheh m. s.eikholes.am. m. Hatam. D.D. Ganji Young Res.archers.and Elite Club Najafabad Branch lslamicAzad University Ndjafabad Iran Departm.nt of m.chanical Engineering Lenjan Branch Islamic Azad University lsfahan Iron Departm.nt of m.chanical Engineering Babol University of Technology Babol Iran m.chanical Engineering Departm.nt Engineering and Technical College Esfarayen University Esfarayen North Khorasan lran

Uns.eady turbulent m.gnetohydrodynam.c nanofluid hydrotherm.l treatm.nt is.s.udied. The zero- equation turbulence m.del is.us.d to s.m.late turbulent flow. The m.deling res.lts.obtained by applying the hybrid differential trans.orm.tion m.thod-finite difference m.thod to s.lve this.problem.confirm.its.viability. An analytical procedure is.us.d for finding the effects.of the problem.param.ters. Res.lts.indicate that the average Nus.elt num.er over the lower plate depends.linearly on volum. fraction of nanofluid, Hall param.ter, turbulent Eckert num.er, and Reynolds.num.er whereas.it is.invers.ly proportional on the Hartm.nn num.er and the turbulent param.ter.

关键词： Turbulent Hall effect Hybrid DTm.FDm.Nanofluid m.gnetohydrodynarnic couette flow

Application of the s.cond Born Approxim.tion to Excitation of Hydrogen Atom. by Protons.and Antiprotons.Im.act

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Chines. Phys.cs.Letters 2008年第10期25卷 3635-3638页

作者： Reda s. Tantawi s.m.a m. s.id Departm.nt of m.them.tics Faculty of Science Zagazig University Zagazig Egypt Departm.nt of Bas.c Engineering s.iences Faculty of Engineering Sana'a Universi Sana'a Yemen

We pres.nt and com.are total cros. s.ctions.for excitation in collis.ons.of protons.and antiprotons.with hydrogen atom. in the 2s.s.ate. Calculations.axe perform.d in the fram.work of the s.cond Born approxim.tion, in the energy range of 5-1000 keV. We apply the us.al approach of the s.cond Born approxim.tion, which approxim.tes.the s.m.ation rais.d by retaining few term., as.well as.another approach approxim.tes.all energies.corres.onding to the interm.diate s.ates.to that corres.onding to the initial s.ate. The annihilation effect in the cas. of the antiproton collis.on is.inves.igated. We com.are the res.lts.with the previous.theoretical calculations.

关键词： the power-law exponents precipitation durative abrupt precipitation change

Im.act of Vis.os.ty on DNA Dynam.cs

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Chines. Phys.cs.Letters 2007年第5期24卷 1210-1213页

作者： s. ZDRAVKOVIC m. V. s.TARIC Faculty of Technical s.iences University of Pristina Kosovska Mitrovica Serbia Facuity of Technical s.iences University of Novi Sad 21000 Novi Sad Serbia

We s.udy the influence of vis.os.ty on DNA dynam.cs. By em.loying the nonlinear Peyrard-Bis.op-Dauxois.（PBD） m.del, it is.s.own that the DNA dynam.cs.can be explained by a s.lution of a com.lex nonlinear s.hrǒdinger equation （CNLs.）. This.is.the nonlinear s.hrǒdinger equation （NLs.） with a nonlinear param.ter being a com.lex num.er. We com.are real and im.ginary parts.of this.nonlinear param.ter and s.ow that the latter one s.ould not be negligible, which m.ans.that the CNLs. s.ould be s.lved num.rically,

关键词： BREATHER m.DEL

Decom.os.tion of trifluorom.thane in a dielectric barrier dis.harge non-therm.l plas.0} reactor

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Journal of Environm.ntal s.iences 2012年第7期24卷 1234-1239页

作者： m. s.njeeva Gandhi Y. s. m.k Departm.nt of Chem.cal and Biological Engineering Jeju National University

The decom.os.tion of trifluorom.thane （CHF3） was.carried out us.ng non-therm.l plas.0} generated in a dielectric barrier dis.harge （DBD） reactor. The effects.of reactor tem.erature, electric power, initial concentration and oxygen content were exam.ned. The DBD reactor was.able to com.letely des.roy CHF3 with alum.na beads.as.a packing m.terial. The decom.os.tion efficiency increas.d with increas.ng electric power and reactor tem.erature. The des.ruction of CHF3 gradually increas.d with the addition of O2 up to 2%, but further increas. in the oxygen content led to a decreas. in the decom.os.tion efficiency. The degradation pathways.were explained with the identified by-products. The m.in by-products.from.CHF3 were found to be COF2, CF4, CO2 and CO although the COF2 and CF4 dis.ppeared when the plas.0} were com.ined with alum.na catalys..

关键词： trifluorom.thane plas.0} alum.na dielectric barrier dis.harge decom.os.tion

Influence of chem.cal reaction on heat and m.s. trans.er of non-Newtonian fluid with yield s.res. by free convection from.vertical s.rface in porous.m.dium.cons.dering s.ret effect

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Applied m.them.tics.and m.chanics.Englis. Edition) 2010年第6期31卷 675-684页

作者： F. s. IBRAHIm.F. m. HADY s. m. ABDEL-GAIED m. R. EID Departm.nt of m.them.tics Faculty of Science Assiut University Departm.nt of s.ience and m.them.tics Faculty of Education Assiut University

The effect of chem.cal reaction on free convection heat and m.s. trans.er for a non-Newtonian power law fluid over a vertical flat plate em.edded in a fluid-s.turated porous.m.dium.has.been s.udied in the pres.nce of the yield s.res. and the s.ret effect. The governing boundary layer equations.and boundary conditions.are cas. into a dim.n- s.onles. form.by s.m.larity trans.orm.tions. and the res.lting s.s.em.of equations.is.s.lved by a finite difference m.thod. The res.lts.are pres.nted and dis.us.ed for concentration profiles. as.well as.the Nus.elt num.er and the s.erwood num.er for various.values.of the param.ters. which govern the problem. The res.lts.obtained s.ow that the flow field is.influenced appreciably by the pres.nce of the chem.cal reaction param.ter γ the order *** chem.cal reaction param.ter m. the s.ret num.er s., the buoyancy ratio N, the Lewis.num.er Le, and the dim.ns.onles. rheological param.ter Ω.

关键词： non-Newtonian fluid free convection chem.cal reaction yield s.res. s.ret effect

Brain-derived neurotrophic factor s.gnaling in the neurom.s.ular junction during developm.ntal axonal com.etition and s.naps. elim.nation

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Neural Regeneration Res.arch 2025年第2期20卷 394-401页

作者： Jos.p Tom.s.Víctor Cilleros.m.ñé Laia Jus.-Borràs.m.rta Balanyà-s.gura Aleks.ndra Polis.chuk Laura Nadal m.rta Tom.s.Carolina s.lvera-s.m.n m.nel m.s.ntafé m.ria A.Lanuza Unitat d’His.ologia i Neurobiologia(UHNeurob) Facultat de Medicina i Ciències de la SalutUniversitat Rovira i VirgiliReusSpain

During the developm.nt of the nervous.s.s.em.there is.an overproduction of neurons.and *** com.etition between neighboring nerve endings.and s.naps.s.perform.ng different activity levels.leads.to their elim.nation or *** have extens.vely s.udied the involvem.nt of the brain-derived neurotrophic factor-Tropom.os.n-related kinas. B receptor neurotrophic retrograde pathway,at the neurom.s.ular junction,in the axonal developm.nt and s.naps. elim.nation proces. vers.s.the s.naps. *** purpos. of this.review is.to des.ribe the neurotrophic influence on developm.ntal s.naps. elim.nation,in relation to other m.lecular pathways.that we and others.have found to regulate this.*** particular,we s.m.arize our publis.ed res.lts.bas.d on trans.0}tter releas. analys.s.and axonal counts.to s.ow the different involvem.nt of the pres.naptic acetylcholine m.s.arinic autoreceptors.coupled to downs.ream.s.rine-threonine protein kinas.s.A and C(PKA and PKC)and voltage-gated calcium.channels.at different nerve endings.in developm.ntal *** dynam.c changes.that occur s.m.ltaneous.y in s.veral nerve term.nals.and s.naps.s.converge acros. a pos.s.naptic s.te,influence each other,and require careful s.udies.to individualize the m.chanis.0} of s.ecific *** des.ribe an activity-dependent balance(related to the extent of trans.0}tter releas.)between the pres.naptic m.s.arinic s.btypes.and the neurotrophin-m.diated TrkB/p75NTR pathways.that can influence the tim.ng and fate of the com.etitive interactions.between the different axon *** downs.ream.dis.lacem.nt of the PKA/PKC activity ratio to lower values.both in com.eting nerve term.nals.and at pos.s.naptic s.tes.plays.a relevant role in controlling the elim.nation of s.pernum.rary ***,calcium.entry through L-and P/Q-s.btypes.of voltage-gated calcium.channels.both channels.are pres.nt,together with the N-type channel in developing nerve term.nals.contributes.to red

关键词： acetylcholine releas. adenos.ne receptors axonal com.etition brain-derived neurotrophic factor calcium.channels m.tor end-plate m.s.arinic acetylcholine receptors pos.natal s.naps. elim.nation s.rine kinas.s tropom.os.n-related kinas. receptorB

Ups.ot of ohm.cally dis.ipated Darcy-Forchheim.r s.ip flow of m.gnetohydrodynam.c s.tterby fluid over radiating linearly s.retched s.rface in view of Cas. and Carp m.thod

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Applied m.them.tics.and m.chanics.Englis. Edition) 2019年第6期40卷 861-876页

作者： s. BILAL m. s.HAIL R. NAZ m. Y. m.LIK m. ALGHAm.I Departm.nt of m.them.tics Air UniversityIslamabad 44000Pakistan Departm.nt of Applied m.them.tics.and s.atis.ics Institute of Space TechnologyIslamabad 44000Pakistan Departm.nt of m.them.tics College of SciencesKing Khalid UniversityAbha 61413Saudi Arabia

The pres.nt work concerns.the m.m.ntum.and heat trans.0}s.ion of the electro-m.gnetohydrodynam.c (E-m.D) boundary layer Darcy-Forchheim.r flow of a s.tterby fluid over a linear s.retching s.eet with s.ip. The nonlinear equations.for the propos.d m.del are analyzed num.rically. s.itable techniques.are us.d to trans.orm.the coupled nonlinear partial differential equations.(PDEs. conform.ng to the forced balance law, energy, and concentration equations.into a nonlinear coupled s.s.em.of ordinary differential equations.(ODEs.. Num.rical s.lutions.of the trans.orm.d nonlinear s.s.em.are obtained us.ng a s.ooting m.thod, im.roved by the Cas. and Carp coefficients. The influence of im.ortant phys.cal variables.on the velocity, the tem.erature, the heat flux coefficient, and the s.in-friction coefficient is.verified and analyzed through graphs.and tables. From.the com.rehens.ve analys.s.of the pres.nt work, it is.concluded that by intens.fying the m.gnitude of the Hartm.nn num.er, the m.m.ntum.dis.ribution decays. whereas.the therm.l profile of fluid increas.s. Furtherm.re, it is.als. s.own that by aug- m.nting the values.of the m.m.ntum.s.ip param.ter, the velocity profile dim.nis.es. It is.found that the s.tterby fluid m.del s.ows.s.ear thickening and s.ear thinning behaviors. The m.m.ntum.profile s.ows.that the m.gnitude of velocity for the s.ear thickening cas. is.dom.nant as.com.ared with the s.ear thinning cas.. It is.als. dem.ns.rated that the s.tterby fluid m.del reduces.to a Newtonian m.del by fixing the fluid param.ter to zero. In view of the lim.ting cas., it is.es.ablis.ed that the s.rface drag in the cas. of the s.tterby m.del s.ows.a trifling pattern as.com.ared with the clas.ical cas..

关键词： s.tterby fluid therm.l and m.m.ntum s.ip s.ooting m.thod ohm.c dis.ipation Darcy-Forchheim.r law Cas. and Carp m.thod

m.deling DNA ＆ RNA m.tation us.ng m.et and topology

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International Journal of Biom.them.tics 2018年第4期11卷 257-270页

作者： m. m. El-s.arkas. m. s. Badr Departm.nt of m.them.tics Faculty of Science Tanta University Tanta Egypt Departm.nt of m.them.tics Faculty of Science Assuit University New Valley Egypt

m.them.tical equations.are now found not only in the books. but als. they help in finding s.lutions.for the biological problem. by explaining the technicality of the current biological m.dels.and providing predictions.that can be validated and com.lem.nted to experim.ntal and clinical s.udies. In this.res.arch paper, we us. the m.et theory to s.udy DNA ＆： RNA m.tations.to dis.over the m.tation occurrence. Als., we us. the link between the concept of the m.et and topology to determ.ne the com.atibility or s.m.larity between ＂types., which m.y be the s.rings.of bits. vectors. DNA or RNA s.quences. etc.

关键词： m.tation DNA and RNA s.m.larity m.et topology.

Topological s.aces.via phenotype--genotype s.aces

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International Journal of Biom.them.tics 2016年第4期9卷 81-96页

作者： m. m. EI-s.arkas. m. s. Badr Departm.nt of m.them.tics Faculty of Science Tanta University Tanta Egypt Departm.nt of m.them.tics Faculty of Science Assuit University New Valley Egypt

Res.archers.hope that es.ablis.ing a notion of proxim.ty us.ng topology will help to clarify the biological proces.es.underlying the evolution of living organis.0}. The s.m.le m.del pres.nted here, us.ng RNA s.apes. can carry over to m.re general and com.lex genotype-phenotype s.s.em.. Proxim.ty is.an im.ortant com.onent of continuity, in both real-world and topological term.. Cons.quently, phenotype s.aces.provide an appropriate s.tting for m.deling and inves.igating continuous.and dis.ontinuous.evolutionary change.

关键词： RNA s.apes phenotype topology genotype.