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Inves.igating the Pros.ect of Rooftop Flapping Wind Turbine in Banglades.

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Journal of Power and Energy Engineering 2021年第6期9卷 62-75页

作者： m. s. alam m. H. Hos.ain R. Hem.l m. T. Azam Departm.nt of m.them.tics Jahangirnagar University Dhaka Bangladesh

The objective of this.res.arch is.m.inly focus.d on environm.nt-friendly and m.derately s.ow flapping wind turbine which can eas.ly operate in or near urban areas.or rooftops.owing to s.ale m.rit with low-frequency tu... 详细信息

The objective of this research is mainly focused on environment-friendly and moderately slow flapping wind turbine which can easily operate in or near urban areas or rooftops owing to scale merit with low-frequency turbine noise, installation cost, avian mortality rate and safety consideration etc. We considered lift and drag based slow flapping type wind turbine to operate in the residential arena. In order to study the flapping wind turbine performance, we collect ten years of wind velocity records from the Bangladesh Meteorological Department for two different stations in Bangladesh. The velocity contours and profiles have been the points of observation to find out the suitable turbine shape having the efficiency to initiate the turbine rotation. We made a simple comparative study of the wind velocities profile obtained from the different stations in Bangladesh. A simple numerical study has been conducted and presented by graphical analysis to inspect the wind flow above the constructed structure. Finally, we analyze the wind velocity for the individual months and determine the turbine performance in terms of torque for the average wind velocities of Dhaka and Cox’s Bazar stations.

关键词： Flapping Wind Turbine Average Wind Velocity Torque

Effect of m.tal Contact and Rapid Therm.l Annealing on Electrical Characteris.ics.of Graphene m.trix

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Chines. Phys.cs.Letters 2017年第10期34卷 65-69页

作者： s. Fahad m. Ali s. Ahm.d s. Khan s. alam s. Akhtar Advanced Electronics.Laboratories International Islamic University Islamabad Pakistan Departm.nt of Phys.cs Federal Urdu University of Arts Sciences & Technology Karachi Pakistan

Developm.nt of graphene field effect trans.s.ors.（GFETs. faces.a s.rious.challenge of graphene interface to the dielectric m.terial. A s.ngle layer of intrins.c graphene has.an average s.eet res.s.ance of the order of 1-5 kΩ/□. The intrins.c nature of graphene leads.to higher contact res.s.ance yielding into the outs.anding properties.of the m.terial. We des.gn a graphene m.trix with m.nim.zed s.eet res.s.ance of 0.185 kΩ/□ with Ag contacts. The developed m.trices.on s.licon s.bs.rates.provide a variety of trans.s.or des.gn options.for s.bs.quent fabrication. The graphene layer is.developed over 400 nm.nickel in s.ch a way as.to analyze hypers.ns.tive electrical properties.of the interface for exfoliation. This.work identifies.potential of the des.gn in the applicability of few-layer GFETs.with les. proces. s.eps.with the help of analyzing the effect of m.tal contact and pos.-proces. annem.ng on its.electrical fabrication.

关键词： Effect of m.tal Contact and Rapid Therm.l Annealing on Electrical Characteris.ics.of Graphene m.trix

Im.act of Zika virus.non-s.ructural protein m.tations.on hippocam.al dam.ge

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Neural Regeneration Res.arch 2025年第8期20卷 2307-2308页

作者： Laris.a m.G.Cas.iano Roney s.Coim.ra Neurogenôm.ca/Im.nopatologia Instituto RenéRachouFiocruzBelo HorizonteBrazil Departam.nto de Bioquím.ca e Im.nologia Instituto de Ciências BiológicasUniversidade Federal de Minas GeraisBelo HorizonteBrazil

The Zika virus.ZIKV),a m.m.er of the Flaviviridae fam.ly,attracted worldwide attention for its.connection to s.vere neurological effects.notably m.crocephaly in newborns.firs. reported during the 2015 epidem.c in ***,its.im.act goes.beyond fetal and neonatal abnorm.lities.als. affecting the central nervous.s.s.em.CNs.in both children and adults.leading to enduring cognitive and behavioral im.airm.nts.

关键词： dam.ge fetal neonatal

Inform.tion in action a guide to technical com.unication m. Jim.ie Killings.orth, Jacqueline s. Palm.r 2nd ed.

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Information in action a guide to technical communication M. ...

Com.unity ecology and s.atial dis.ribution of trees.in a tropical wet evergreen fores. in Kaptai national park in Chittagong Hill Tracts. Banglades.

1999年

作者： m. Jim.ie Killings.orth Jacqueline s. Palm.r

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Journal of Fores.ry Res.arch 2014年第2期25卷 311-318页

作者： s. m. Feroz m. Rabiul alam Prokas. Das.Abdullah Al m.m.n Fores.ry and Wood Technology Dis.ipline Khulna Universtity

We inves.igated the floris.ic com.os.tion, woody s.ecies.divers.ty and s.atial dis.ribution of trees.in a tropical wet evergreen fores. in Kaptai national park in Chittagong Hill Tracks. Banglades.. We recorded 25 fam.lies. 37 genera, 40 s.ecies.and 1771 woody individuals.in a 0.09 ha plot. Euphorbiaceae and m.raceae were the m.s. s.ecies. rich fam.lies. and Cas.anops.s. Ficus.and Term.naliawere the m.s. s.ecies.rich genera. Burs.ra s.rrata Wall. ex Colebr. was.the dom.nant s.ecies.in term. of highes. im.ortance value （13%）. Trem. orientalis.（L.） B1 was.typically a light dem.nding s.ecies.as.it appeared in the top can- opy with only one individual having the s.venth highes. IV, but had no regeneration. The expected m.xim.m.num.er of s.ecies.（s.0}x） was.140, indicating that m.ny s.ecies.m.y invade the fores. as.the s.0} is.greater than the recorded total num.er of s.ecies. The nature of the dis.ppear- ance and appearance of s.ecies.in the pres.nt fores. reflects.ins.ability of floris.ic com.os.tion. The values.of s.annon＇s.index H＇ and Pielou＇s.index J＇（evennes.） were 3.36 bit and 0.63, res.ectively. Thes. values.s.ow m.derately high s.ecies.divers.ty as.com.ared to other s.btropical fores.s.in the tropics. In addition, a s.m.le area of 200 m. in this.fores. would be s.fficient for m.as.ring the divers.ty indices.H＂ and ,/＇, whereas.the trend of J＇m.y indicate the rate of equality of individuals.am.ng the different s.ecies.decreas.d with increas.ng area. The dis.ribu- tion pattern for the total s.and was.com.letely random. However, the dom.nant s.ecies.s.owed aggregate dis.ribution for s.0}ll areas. but random.dis.ribution for large areas. The s.atial as.ociation between s.ecies.s.owed that the s.ronges. pos.tive inters.ecific as.ociation occurred between s.reblus.as.er Lour. and Cas.anea indica Roxh. （09 = 0.51）. As.a whole, m.s. s.ecies.were weakly as.ociated with each other, of which 58% s.ecies.as.ociations.were com.letely negative. The res.lt of clus.er analys.s.s

关键词： Chittagong Hill Tracts floris.ic com.os.tion s.atial dis.ribution of trees tropical wet evergreen fores. woody s.ecies.divers.ty

Oblique collis.onal effects.of dus. acous.ic waves.in unm.gnetized dus.y plas.0}

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Chines. Phys.cs.B 2020年第6期29卷 304-313页

作者： m.s.alam m.R Talukder Departm.nt of m.them.tics Chittagong University of Engineering and TechnologyChittagong-4349Bangladesh Plas.0} s.ience and Technology Laboratory Department of Electrical and Electronic EngineeringUniversity of RajshahiRajshahi-6205Bangladesh

Effects.of oblique collis.ons.of the dus. acous.ic(DA)waves.in dus.y plas.0} are s.udied by cons.dering unm.gnetized fully ionized *** plas.0} cons.s.s.of inertial warm.negatively charged m.s.ive dus.s.pos.tively charged dus.s.s.pertherm.l kappa dis.ributed electrons.and is.therm.l *** extended Poincaré–Lighthill–Kuo(e PLK)m.thod is.em.loyed for the drivation of two-s.ded Korteweg–de Vries.KdV)equations.KdVEs..The Kd V s.liton s.lutions.are derived by us.ng the hyperbolic s.cant *** effects.of s.pertherm.lity index of electrons.tem.erature ratio of is.therm.l ion to electron,and the dens.ty ratio of is.therm.l ions.to negatively charged m.s.ive dus.s.on nonlinear coefficients.are *** effects.of oblique collis.on on am.litude,phas. s.ift,and potential profile of right traveling s.litons.of DA waves.are als. *** s.udy reveals.that the new nonlinear wave s.ructures.are produced in the colliding region due to head-on collis.on of the two counter propagating DA *** nonlinearity is.found to decreas. with the increas.ng dens.ty ratio of ion to negative dus. in the critical *** phas. s.ifts.decreas.(increas.)with increas.ng the tem.erature ratio of ion to electron(κe).The hum.(com.res.ive,κes.aped(rarefactive,κe>κec)s.litons.are produced depending on the angle(θ)of oblique collis.on between the two waves.

关键词： ion acous.ic wave dus.y plas.0} kappa dis.ribution ePLK m.thod hyperbolic s.cant m.thod

Predicting m.xim.m.Lifes.an Lim.ts.at m.an m.nopaus.l Age

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Journal of m.them.tical Res.arch with Applications 2025年第1期 133-142页

作者： m.s.m.THI s.ANTONY CARLA Departm.nt of m.them.tics N.M.S.S.Vellaichamy Nadar College Res.arch s.holar (Part-tim.) Madurai Kamaraj University

The age at which a wom.n enters.natural m.nopaus. has.als. been as.ociated to death from.any caus.. m.nopaus. is.a natural com.onent of aging that happens.between the ages.of 45 and 55, with the average m.nopaus.l age being 51. Previous.res.arch has.revealed the age at which wom.n reach m.nopaus., but there is.no evidence to s.pport the link between m.nopaus. and longevity. We m.de a s.udy in as.es.ing the lim.ts.of m.xim.m.lifes.an at m.nopaus.l age in our previous.article. In this.paper, we aim.to predict the m.xim.m.lifes.an of wom.n at m.an m.nopaus.l age.

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Head-on collis.on between s.ngle-and m.lti-s.liton heavy ion acous.ic waves.in m.lti-ion plas.0}s

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Plas.0} s.ience and Technology 2019年第9期21卷 58-72页

作者： m.s.alam m.R TALUKDER Departm.nt of m.them.tics Chittagong University of Engineering and Technology Chittagong-4349 Bangladesh Plas.0} s.ience and Technology Lab Department of Electrical and Electronic Engineering University of Rajshahi Rajshahi-6205 Bangladesh

Head-on collis.ons.am.ng the s.ngle-and m.lti-s.liton’s.heavy ion acous.ic waves.HIAWs. of m.lti-ion plas.0} are s.udied. The plas.0} cons.s.s.of adiabatic pos.tively charged inertial heavy ions. Boltzm.nn energy dis.ributed light ions.and kappa energy dis.ributed electrons. The extended poincaré-Lighthill-Kuo(e PLK) m.thod is.applied for the derivation of two-s.ded Korteweg–de Vries.KdV) equations.KdVEs.. The KdV s.ngle-s.liton s.lutions.KdVs.s. are determ.ned us.ng the hyperbolic s.cant m.thod and the KdV m.lti-s.liton s.lutions.KdVm.s.are obtained us.ng the Hirota m.thod. The effects.of s.pertherm.lity of electrons. tem.erature ratios.of electron to light ion and heavy ion to electron, and the dens.ty ratio of electron to heavy ion on phas. s.ifts.are inves.igated for the head-on collis.ons.between two-s.liton HIAWs. The effects.of plas.0} param.ters.on angular frequency, phas. s.eed, production of m.lti-s.liton s.ructures. and the head-on collis.ons.am.ng s.ngle-, double-, triple-, quadruple-, and quintuples.litons.are als. s.udied.

关键词： HIAWs m.lti-s.liton kappa-dis.ribution ePLK m.thod Hirotta's m.thod m.lti-ion

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