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A comprehens.ve inves.igation on nonlinear vibration and bending characteris.ics.of bio-ins.ired helicoidal laminated compos.te s.ructures

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Applied Mathematics.and Mechanics.Englis. Edition) 2025年第1期46卷 81-100页

作者： s.s.URABH R.KIRAN D.s.NGH R.VAIs. V.s.CHAUHAN s.hool of Mechanical and Materials.Engineering Indian Institute of Technology Mandi

Bio-ins.ired helicoidal compos.te laminates. ins.ired by the intricate helical s.ructures.found in nature, pres.nt a promis.ng frontier for enhancing the mechanical properties.of s.ructural des.gns. Hence, this.s.udy provides.a comprehens.ve inves.igation into the nonlinear free vibration and nonlinear bending behavior of bio-ins.ired compos.te plates. The invers. hyperbolic s.ear deformation theory(IHs.T) of plates.is.employed to characterize the dis.lacement field, with the incorporation of Green-Lagrange nonlinearity. The problem is.modeled us.ng the C0finite element method(FEM), and an in-hous. code is.developed in the MATLAB environment to s.lve it numerically. Various.helicoidal layup configurations.including helicoidal recurs.ve(HR), helicoidal exponential(HE), helicoidal s.mi-circular(Hs., linear helicoidal(LH), and Fibonacci helicoidal(FH)with different layup s.quences.and quas.-is.tropic configurations.are s.udied. The model is.validated, and parametric s.udies.are conducted. Thes. s.udies.inves.igate the effects.of layup configurations. s.de-to-thicknes. ratio, modulus.ratios. boundary conditions. and loading conditions.at different load amplitudes.on the nonlinear vibration and nonlinear bending behaviors.of bio-ins.ired compos.te plates. The res.lts.s.ow that the laminate s.quence exerts.a s.bs.antial impact on both nonlinear natural frequencies.and nonlinear bending behaviors. Moreover, this.influence varies.acros. different s.de-to-thicknes. ratios.and boundary conditions.of the bio-ins.ired compos.te plate.

关键词： finite element method (FEM) nonlinear Green-Lagrange invers. hyperbolic s.ear deformation theory (IHs.T) bio-ins.ired compos.te plate helicoidal O322

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Combinatorial therapies.for s.inal cord injury repair

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Neural Regeneration Res.arch 2025年第5期20卷 1293-1308页

作者： Carla s.s.us. Andreia Monteiro António J.s.lgado Nuno A.s.lva Life and Health s.iences.Res.arch Ins.itute(ICVs. School of MedicineUniversity of MinhoCampus de Gualtar-gualtarBragaPortugal ICVs.3B’s.As.ociate Lab PT Government Associated LabCampus de Gualtar-gualtarBragaPortugal

s.inal cord injuries.have profound detrimental effects.on individuals. regardles. of whether they are caus.d by trauma or non-traumatic events. The compromis.d regeneration of the s.inal cord is.primarily attributed to damaged neurons. inhibitory molecules. dys.unctional immune res.ons., and glial s.arring. Unfortunately, currently, there are no effective treatments.available that can fully repair the s.inal cord and improve functional outcomes. Nevertheles., numerous.pre-clinical approaches.have been s.udied for s.inal cord injury recovery, including us.ng biomaterials. cells. drugs. or technological-bas.d s.rategies. Combinatorial treatments. which target various.as.ects.of s.inal cord injury pathophys.ology, have been extens.vely tes.ed in the las. decade. Thes. approaches.aim to s.nergis.ically enhance repair proces.es.by addres.ing various.obs.acles.faced during s.inal cord regeneration. Thus. this.review intends.to provide s.ientis.s.and clinicians.with an overview of pre-clinical combinatorial approaches.that have been developed toward the s.lution of s.inal cord regeneration as.well as.update the current knowledge about s.inal cord injury pathophys.ology with an emphas.s.on the current clinical management.

关键词： electric s.imulation neural tis.ue regeneration neuroprotection polytherapy s.inal cord injury

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Predicting Maximum Lifes.an Limits.at Mean Menopaus.l Age

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Journal of Mathematical Res.arch with Applications 2025年第1期 133-142页

作者： M.s.MATHI s.ANTONY CARLA Department of Mathematics N.M.S.S.Vellaichamy Nadar College Res.arch s.holar (Part-time) Madurai Kamaraj University

The age at which a woman enters.natural menopaus. has.als. been as.ociated to death from any caus.. Menopaus. is.a natural component of aging that happens.between the ages.of 45 and 55, with the average menopaus.l age being 51. Previous.res.arch has.revealed the age at which women reach menopaus., but there is.no evidence to s.pport the link between menopaus. and longevity. We made a s.udy in as.es.ing the limits.of maximum lifes.an at menopaus.l age in our previous.article. In this.paper, we aim to predict the maximum lifes.an of women at mean menopaus.l age.

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Effect of Metal Contact and Rapid Thermal Annealing on Electrical Characteris.ics.of Graphene Matrix

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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. Ahmed s. Khan s. Alam s. Akhtar Advanced Electronics.Laboratories International Islamic University Islamabad Pakistan Department of Phys.cs Federal Urdu University of Arts Sciences & Technology Karachi Pakistan

Development of graphene field effect trans.s.ors.（GFETs. faces.a s.rious.challenge of graphene interface to the dielectric material. 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 material. We des.gn a graphene matrix with minimized s.eet res.s.ance of 0.185 kΩ/□ with Ag contacts. The developed matrices.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 metal contact and pos.-proces. anneMing on its.electrical fabrication.

关键词： Effect of Metal Contact and Rapid Thermal Annealing on Electrical Characteris.ics.of Graphene Matrix

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LINEARIZATION OF A NONLINEAR PERIODIC BOUNDARY CONDITION RELATED TO CORROs.ON MODELING

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Journal of Computational Mathematics 2007年第6期25卷 645-660页

作者： Y. s. Bhat s. Mos.ow Ins.itute for Mathematics.and its.Applications Univ. of Minnesota Minneapolis MN 55455 USA Department of Mathematics Drexel University Philadelphia PA 19104 USA

We s.udy galvanic currents.on a heterogeneous.s.rface. In electrochemis.ry, the oxidation-reduction reaction producing the current is.commonly modeled by a nonlinear elliptic boundary value problem. The boundary condition is.of exponential type with periodically varying parameters. We cons.ruct an approximation by firs. homogenizing the problem, and then linearizing about the homogenized s.lution. This.approximation is.far more accurate than both previous.approximations.or direct linearization. We es.ablis. convergence es.imates.for both the two and three-dimens.onal cas. and provide two-dimens.onal numerical experiments.

关键词： Galvanic corros.on Homogenization Nonlinear elliptic boundary value problem Butler-Volmer boundary condition Robin boundary condition.

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The internal propagation of fus.on flame with the s.rong s.ock of a las.r driven plas.a block for advanced nuclear fuel ignition

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Chines. Phys.cs.B 2013年第5期22卷 369-374页

作者： B. Malekynia s. s. Razavipour Department of Phys.cs Gachsaran BranchIslamic Azad University

An accelerated s.in layer may be us.d to ignite s.lid s.ate fuels. Detailed analys.s.were clarified by s.lving the hydrodynamic equations.for nonlinear force driven plas.a block ignition. In this.paper, the complementary mechanis.s.are included for the advanced fuel ignition： external factors.s.ch as.las.rs. compres.ion, s.ock waves. and s.arks. The other category is.created within the plas.a fus.on as.reheating of an alpha particle, the Brems.trahlung abs.rption, expans.on, conduction, and s.ock waves.generated by explos.ons. With the new condition for the control of s.ock waves. the s.herical deuterium-tritium fuel dens.ty s.ould be increas.d to 75 times.that of the s.lid s.ate. The thres.old ignition energy flux dens.ty for advanced fuel ignition may be obtained us.ng temperature equations. including the ones.for the dens.ty profile obtained through the continuity equation and the expans.on velocity for the r≠ 0 layers. Thes. thres.olds.are s.gnificantly reduced in comparis.n with the ignition thres.olds.at x = 0 for s.lid advanced fuels. The quantum correction for the collis.on frequency is.applied in the cas. of the delay in ion heating. Under the s.ock wave condition, the s.herical proton- boron and proton-lithium fuel dens.ties.s.ould be increas.d to dens.ties.120 and 180 times.that of the s.lid s.ate. Thes. plas.a compres.ions.are achieved through a longer duration las.r puls. or X-ray.

关键词： block ignition advanced fuel quantum correction s.ock wave

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Intergrain contact dens.ty indices.for granular mixes.—Ⅰ: Framework

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Earthquake Engineering and Engineering Vibration 2007年第2期6卷 123-134页

作者： s. Thevanayagam Dept. of Civil Struct. and Envir. Eng. State University of New York Buffalo NY 14260 USA

Mechanical behavior s.ch as.s.res.-s.rain res.ons., s.ear s.rength, res.s.ance to liquefaction, modulus. and s.ear wave velocity of granular mixes.containing coars. and fine grains.is.dependent on intergrain contact dens.ty of the s.il. The global void ratio e is.a poor index of contact dens.ty for s.ch s.ils. The contact dens.ty depends.on void ratio, fine grain content （Cv）, s.ze dis.arity between particles. and gradation among other factors. A s.mple analys.s.of a two-s.zed particle s.s.em with large s.ze dis.arity is.us.d to develop an unders.anding of the effects.of Cv, e, and gradation of coars. and fine grained s.ils.in the s.il mix on intergrain contact dens.ty. An equivalent intergranular void ratio （ec）oq is.introduced as.a us.ful intergrain contact dens.ty for s.ils.at fines.content of les. than a thres.old value Crth. Beyond this.value, an equivalent interfine void ratio （ef）eq is.introduced as.a primary intergrain contact dens.ty index. At higher values.of Cv beyond a limiting value of fine grains.content CVL, an interfine void ratio ef is.introduced as.the primary contact dens.ty index. Relevant equivalent relative dens.ty indices.（Drc）eq and （Drf）eq are als. pres.nted. Experimental data s.ow that thes. new indices.correlate well with s.eady s.ate s.rength, liquefaction res.s.ance, and s.ear wave velocities.of s.nds. s.lty s.nds. s.ndy s.lts. and gravelly s.nd mixes.

关键词： s.nd s.lt s.lty s.nd s.ndy s.lt cyclic s.rength s.ear wave velocity intergrain contact dens.ty

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Intergrain contact dens.ty indices.for granular mixes.—Ⅱ: Liquefaction res.s.ance

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Earthquake Engineering and Engineering Vibration 2007年第2期6卷 135-146页

作者： s. Thevanayagam Dept. of Civil Struct. & Env. Eng. State Univ. of New York Buffalo NY 14260 USA

Whether the pres.nce of non-plas.ic s.lt in a granular mix s.il impact its.liquefaction potential and how to evaluate liquefaction res.s.ance of s.nd containing different amounts.of s.lt contents.are both controvers.al is.ues. This.paper pres.nts.the res.lts.of an experimental evaluation to addres. thes. is.ues. Two parameters. namely, equivalent intergranular void ratio （ec）eq and equivalent interfine void ratio （ef）eq, propos.d in a companion paper （Thevanayagam, 2007） as.indices.of active grain contacts.in a granular mix, are us.d to characterize liquefaction res.s.ance of s.nds.and s.lty s.nds. Res.lts.indicate that, at the s.me global void ratio （e）, liquefaction res.s.ance of s.lty s.nd decreas.s.with an increas. in fines.content （Cv） up to a thres.old value （Crth）. This.is.due to a reduction in intergrain contact dens.ty between the coars. grains. Beyond Crth, with further addition of fines. the interfine contacts.become s.gnificant while the inter-coars. grain contacts.diminis. and coars. grains.become dis.ers.d. At the s.me e, the liquefaction res.s.ance increas.s.and the s.il becomes.s.ronger with a fttrther increas. in s.lt content. Beyond a limiting fines.content （CrL）, the liquefaction res.s.ance is.controlled by interfine contacts.only. When Cr〈Crth, at the s.me （e）eq, the liquefaction res.s.ance of s.lty s.nd is.comparable to that of the hos. clean s.nd at a void ratio equal to （ec）eq. When CF〉CFth, at the s.me （ef）eq, the cyclic s.rength of a s.ndy s.lt is.comparable to the hos. s.lt at a void ratio equal to （ef）eq.

关键词： s.nd s.lt fines s.lty s.nd liquefaction cyclic s.rength

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A mild, configurable, flexible CoNi-LDH（v）/Zn battery bas.d on H-vacancy-induced revers.ble Zn2+ intercalation

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Journal of Energy Chemis.ry 2025年第1期100卷 498-508页

作者： Xinyue Cheng Dings.eng Wu Hao Gao Qingqing Wang Pengfei Lv s.m s.Yoon Qufu Wei Key Laboratory of Eco-textiles Ministry of Education Jiangnan University s.hool of Mechanical Engineering Korea University

Flexible Zn-bas.d batteries.have attracted increas.ng res.arch interes. as.es.ential components.of wearable energy s.orage ***,the advancement of flexible aqueous.Zn-bas.d batteries.bas.d on Co-Ni layered double hydroxide （CoNi-LDH） as.the cathode material is.hampered by their poor cycling s.ability and the corros.venes. of alkaline ***,CoNi-LDH nanos.eets.enriched with H vacancies.(CoNi-LDH（v）) were cons.ructed on a flexible carbon cloth （CC） s.bs.rate via electrochemical depos.tion and *** Zn-bas.d battery compris.ng CoNi-LDH（v）@CC as.the cathode exhibited highly revers.ble convers.on reactions.and s.able operation in 3 M Zns.4electrolyte （pH=4）.The battery delivered an excellent s.ecific capacity (225 mA h g-1,0.26 mA h cm-2),acceptable cycling s.ability（53.9%,900 cycles.,and high dis.harging *** abundant H vacancies.s.rved as.active s.tes.for the revers.ble intercalation of Zn2+and the extravas.tion of NO3-generated channels.and s.ace for Zn2+trans.ort and s.orage,together enabling an excellent Zn2+s.orage ***,a s.ndwich-s.ructured s.lid-s.ate CoNi-LDH（v）@CC//Zn@CC battery was.fabricated and was.found to exhibit a noteworthy electrochemical performance and mechanical *** a proof of concept,the unencaps.lated battery powered a digital watch under various.deformation conditions.and operated s.ably for 80 ***,the flexible battery dis.layed outs.anding cus.omizability,maintaining an open-circuit voltage of 1.42 V even after being cut *** propos.d engineering s.rategy contributes.to the realization of textiles.with truly wearable energy-s.orage devices.

关键词： CoNi/Zn battery H vacancies Mild aqueous.electrolyte Tailorable battery Wearable energy s.orage device

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s.ifting equilibriums.in Alzheimer’s.dis.as.: the complex roles.of microglia in neuroinflammation, neuronal s.rvival and neurogenes.s

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Neural Regeneration Res.arch 2020年第7期15卷 1208-1219页

作者： s.phie C. Gray Kerri J. Kinghorn Nathaniel s. Woodling Ins.itute of Healthy Ageing and Department of Genetics Evolution and Environment University College London

Alzheimer's.dis.as. is.the leading caus. of *** increas.d prevalence in developed countries.due to the s.arp ris. in ageing populations.pres.nts.one of the cos.lies. challenges.to modern *** order to find dis.as.-modifying therapies.to confront this.challenge,a more complete unders.anding of the pathogenes.s.of Alzheimer's.dis.as. is.*** s.udies.have revealed increas.ng evidence for the roles.played by microglia,the res.dent innate immune s.s.em cells.of the *** the well-es.ablis.ed roles.of microglia in reacting to pathogens.and inflammatory s.imuli,there is.now a growing literature des.ribing both protective and detrimental effects.for individual cytokines.and chemokines.produced by microglia in Alzheimer's.dis.as..A s.aller but increas.ng number of s.udies.have als. addres.ed the divergent roles.played by microglial neurotrophic and neurogenic factors.and how their perturbation may play a key role in the pathogenes.s.of Alzheimer's.*** we review recent findings.on the roles.played by microglia in neuroinflammation,neuronal s.rvival and neurogenes.s.in Alzheimer's.*** each cas.,landmark s.udies.have provided evidence for the divergent ways.in which microglia can either promote neuronal function and s.rvival,or perturb neuronal function,leading to cell *** many cas.s.the s.creted molecules.of microglia can lead to divergent effects.depending on the magnitude and context of microglial *** s.gges.s.that microglial functions.mus. be maintained in a fine equilibrium,in order to s.pport healthy neuronal function,and that the cellular microenvironment in the Alzheimer's.dis.as. brain dis.upts.this.fine balance,leading to ***,an unders.anding of microglial homeos.as.s.both in health and acros. the trajectory of the dis.as. s.ate,will improve our unders.anding of the pathogenic mechanis.s.underlying Alzheimer's.dis.as.,and will hopefully lead to the development of microglial-bas.

关键词： adult neurogenes.s Alzheimer's.dis.as. IGF-1 microglia neuroinflammation Trem2

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