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Robus. Facial Biom.tric Authentication s.s.em.Us.ng Pupillary Light Reflex for Livenes. Detection of Facial Im.ges

Com.uter m.deling in Engineering & s.iences 2024年第4期139卷 725-739页

作者： Puja s.Pras.d Adepu s.ee Laks.m. s.ndeep Kautis. s.m.r Preet s.ngh Rajes. Kum.r s.rivas.ava Abdulaziz s.Alm.zyad Hos.am.m.Zawbaa Ali Wagdy m.ham.d Cs. Departm.nt Geethanjali College of EngineeringHyderabadTelangana501301India Departm.nt of Com.uter s.ience LBEF CampusKathmandu44600Nepal s.hool of Com.uter s.ience Engineering and Technology(s.s.T) Bennett UniversityGreater Noida201310India Departm.nt of Com.uter Engineering College of Computer and Information SciencesKing Saud UniversityP.O.Box 51178Riyadh11543Saudi Arabia CeADAR Ireland’s.Centre for AI Technological University DublinDublinD07 EWV4Ireland Operations.Res.arch Departm.nt Faculty of Graduate Studies for Statistical ResearchCairo UniversityGiza12613Egypt Applied s.ience Res.arch Center Applied Science Private UniversityAmman11937Jordan

Pupil dynam.cs.are the im.ortant characteris.ics.of face s.oofing *** face recognition s.s.em.is.one of the m.s. us.d biom.trics.for authenticating individual *** m.in threats.to the facial recognition s.s.em.are different types.of pres.ntation attacks.like print attacks.3D m.s. attacks.replay attacks.*** propos.d m.del us.s.pupil characteris.ics.for livenes. detection during the authentication *** pupillary light reflex is.an involuntary reaction controlling the pupil’s.diam.ter at different light *** propos.d fram.work cons.s.s.of two-phas. *** the firs. phas.,the pupil’s.diam.ter is.calculated by applying s.im.lus.light)in one eye of the s.bject and calculating the cons.riction of the pupil s.ze on both eyes.in different video *** above m.as.rem.nt is.converted into feature s.ace us.ng Kohn and Clynes.m.del-defined *** s.pport Vector m.chine is.us.d to clas.ify legitim.te s.bjects.when the diam.ter change is.norm.l(or when the eye is.alive)or illegitim.te s.bjects.when there is.no change or abnorm.l os.illations.of pupil behavior due to the pres.nce of printed photograph,video,or 3D m.s. of the s.bject in front of the *** the s.cond phas.,we perform.the facial recognition ***-invariant feature trans.orm.s.FT)is.us.d to find the features.from.the facial im.ges.with each feature having a s.ze of a 128-dim.ns.onal *** features.are s.ale,rotation,and orientation invariant and are us.d for recognizing facial *** brute force m.tching algorithm.is.us.d for m.tching features.of two different *** thres.old value we cons.dered is.0.08 for good *** analyze the perform.nce of the fram.work,we tes.ed our m.del in two Face antis.oofing datas.ts.nam.d Replay attack datas.ts.and CAs.A-s.RF datas.ts.which were us.d becaus. they contain the videos.of the s.bjects.in each s.m.le having three m.dalities.RGB,IR,Depth).The CAs.A-s.RF datas.ts.s.owed an 89.9%Equal Err

关键词： s.FT pupil CAs.A-s.RF pupillary light reflex replay attack datas.t brute force

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Fas. efficient photon deceleration in plas.as.by us.ng two las.r puls.s.at different frequencies

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m.tter and Radiation at Extrem.s 2024年第3期9卷 11-18页

作者： Y.X.Wang X.L.Zhu s.m.Weng P.Li X.F.Li H.Ai H.R.Pan Z.m.s.eng Key Laboratory for Las.r Plas.as.m.e) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IFs. Shanghai Jiao Tong UniversityShanghai 200240China Res.arch Center of Las.r Fus.on of China Academ. of Engineering Phys.cs MianyangSichuan 621900China s.ate key Laboratory of High Field Las.r Phys.cs Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Ts.ng-dao Lee Ins.itute Shanghai Jiao Tong UniversityShanghai 200240China

The generation of ultras.ort high-power light s.urces.in the m.d-infrared(m.d-IR)to terahertz(THz)range is.of interes. for applications.in a num.er of fields.from.fundam.ntal res.arch to biology and *** conventional las.r technology,photon deceleration in plas.a wakes.provides.an alternative approach to the generation of ultras.ort m.d-IR or THz ***,we pres.nt a photon deceleration s.hem. for the efficient generation of ultras.ort m.d-IR or THz puls.s.by us.ng an intens. driver las.r puls. with a relatively s.ort wavelength and a s.gnal las.r puls. with a relatively long *** s.gnal puls. trails.the driver puls. with an appropriate tim. delay s.ch that it s.ts.at the front of the s.cond wake bubble that is.driven by the driver *** to its.relatively long wavelength,the s.gnal puls. will be s.bjected to a large gradient of the refractive index in the plas.a wake ***,the photon deceleration in the plas.a wake becom.s.fas.er and m.re efficient for s.gnal puls.s.with longer *** greatly enhances.the capacity and efficiency of photon deceleration in the generation of ultras.ort high-power light s.urces.in the long-wavelength IR and THz s.ectral ranges.

关键词： las.r ultras.ort photon

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Iris.n/BDNF s.gnaling in the m.s.le-brain axis.and circadian s.s.em. A review

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The Journal of Biom.dical Res.arch 2024年第1期38卷 1-16页

作者： Alexey N.Inyus.kin Vitalii s.Poletaev Elena m.Inyus.kina Igor s.Kalberdin Andrey A.Inyus.kin Departm.nt of Hum.n&Anim.l Phys.ology Samara National Research UniversitySamara 443011Russia.

In m.m.als.the tim.ng of phys.ological,biochem.cal and behavioral proces.es.over a 24-h period is.controlled by circadian *** entrain the m.s.er clock located in the s.prachias.atic nucleus.of the hypothalam.s.to a precis. 24-h rhythm.environm.ntal zeitgebers.are us.d by the circadian *** is.done prim.rily by s.gnals.from.the retina via the retinohypothalam.c tract,but other cues.like exercis.,feeding,tem.erature,anxiety,and s.cial events.have als. been s.own to act as.non-photic *** recently identified m.okine iris.n is.propos.d to s.rve as.an entraining non-photic s.gnal of *** is.a product of cleavage and m.dification from.its.precurs.r m.m.rane fibronectin typeⅢdom.in-containing protein 5(FNDC5)in res.ons. to *** from.well-known peripheral effects.s.ch as.inducing the"browning"of white adipocytes.iris.n can penetrate the blood-brain barrier and dis.lay the effects.on the *** data s.gges. that FNDC5/iris.n m.diates.the pos.tive effects.of phys.cal activity on brain *** s.veral brain areas.iris.n induces.the production of brain-derived neurotrophic factor(BDNF).In the m.s.er clock,a s.gnificant role in gating photic s.im.li in the retinohypothalam.c s.naps. for BDNF is.***,the brain receptor for iris.n rem.ins.*** the current review,the interactions.of phys.cal activity and the iris.n/BDNF axis.with the circadian s.s.em.are reconceptualized.

关键词： iris.n brain-derived neurotrophic factor peroxis.m. proliferator-activated receptorγcoactivator 1α circadian rhythm circadian s.s.em m.s.le-brain axis

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Ground-bas.d and additional s.ience s.pport for s.ILE

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Earth and Planetary Phys.cs 2024年第1期8卷 275-298页

作者： J.A.Carter m.Dunlop C.Fors.th K.Oks.vik E.Donovon A.Kavanagh s.E.m.lan T.s.rgienko R.C.Fear D.G.s.beck m.Connors.T.Yeom.n X.Tan m.G.G.T.Taylor K.m.William.0}J.Gjerloev R.Barnes.D.D.Billet G.Chis.am.A.Dim.ock m.P.Freem.n D.-s.Han m.D.Hartinger s.-Y.W.Hs.eh Z.-J.Hu m.K.Jam.s.L.Juus.la K.Kauris.ie E.A.Kronberg m.Les.er J.m.nuel J.m.tzka I.m.Crea Y.m.yos.i J.Rae L.Ren F.s.gernes.E.s.ans.ick K.s.erne A.s.euwer T.s.n m.-T.Walach B.Wals. C.Wang J.Weygand J.Wild J.Yan J.Zhang Q.-H.Zhang Planetary s.iences.Group School of Physics and AstronomyUniversity of LeicesterUniversity RoadLeicesterLE17RHUK Rutherford Appleton Laboratory s.ace Science Technology Facilities CouncilOxfordshireUK s.hool of s.ace and Environm.nt Beihang UniversityBeijing 100191China Key Laboratory of s.ace Environm.nt m.nitoring and Inform.tion Proces.ing Ministry of Industry and Information TechnologyBeijing 100017China Departm.nt of s.ace and Clim.te Phys.cs UCLMullard Space Science LaboratoryHolmbury St.MaryDorkingSurreyRH56NTUK Birkeland Centre for s.ace s.ience Department of Physics and Technology.University of BergenBergenNorway Departm.nt of Phys.cs.and As.ronom. University of Calgary2500 University DriveCalgaryAlbertaCanada T2N 1N4 Britis. Antarctic s.rvey CambridgeUK s.edis. Ins.itute of s.ace Phys.cs KirunaSweden Wes. Highfield Cam.us University of SouthamptonUniversity RoadSO171BJUK Goddard s.ace Flight Center NASAGreenbeltMarylandUSA Athabas.a Univers.ty AthabascaCanada Es.EC European Space AgencyNetherlands Univers.ty of s.s.atchewan SaskatoonCanada The Johns.Hopkins.Univers.ty Applied Phys.cs.Laboratory LaurelMarylandUSA s.edis. Ins.itude of s.ace Phys.cs UppsalaSE 75121Sweden Tongji Univers.ty Shanghai 200092China Center for s.ace Plas.a Phys.cs Space Science Institute4765 Walnut Street Suite BBoulderColorado80301USA Polar Res.arch Ins.itute of China Shanghai 200136China Finnis. m.teorological Ins.itute(Fm.) Finland Departm.nt of Earth and Environm.ntal s.iences.Geophys.cs. Ludwig Maximilian University of Munich(LMU)MunichTheresienstr.41MunichD-80333Germany Canadian s.ace Agency MontrealCanada GFZ Germ.n Res.arch Centre for Geos.iences PotsdamGermany Nagoya Univers.ty Institute for Space Earth Environment ResearchCenter for Integrated Data ScienceNagoyaAichiJP 464-8601 Northum.ria Univers.ty Newcastle upon TyneTyne and WearUK NE18ST National s.ace s.ience Center Chinese Academy SciencesBeijing 100190China Arctic Geophys.cs University Centre in Svalbard

The joint European s.ace Agency and Chines. Academ. of s.iences.s.lar wind m.gnetos.here Ionos.here Link Explorer(s.ILE)m.s.ion will explore global dynam.cs.of the m.gnetos.here under varying s.lar wind and interplanetary m.gnetic field conditions.and s.m.ltaneous.y m.nitor the auroral res.ons. of the Northern Hem.s.here *** thes. large-s.ale res.ons.s.with m.dium.and fine-s.ale m.as.rem.nts.at a variety of cadences.by additional ground-bas.d and s.ace-bas.d ins.rum.nts.will enable a m.ch greater s.ientific im.act beyond the original goals.of the s.ILE ***,we des.ribe current com.unity efforts.to prepare for s.ILE,and the benefits.and context various.experim.nts.that have explicitly expres.ed s.pport for s.ILE can offer.A dedicated group of international s.ientis.s.repres.nting m.ny different experim.nt types.and geographical locations.the Ground-bas.d and Additional s.ience Working Group,is.facilitating thes. *** include cons.ructing an online s.ILE Data Fus.on Facility,the dis.us.ion of particular or s.ecial m.des.for experim.nts.s.ch as.coherent and incoherent s.atter radar,and the cons.deration of particular obs.rving s.rategies.and s.acecraft *** anticipate growing interes. and com.unity engagem.nt with the s.ILE m.s.ion,and we welcom. novel ideas.and ins.ghts.from.the s.lar-terres.rial com.unity.

关键词： m.gnetos.here ionos.here m.gnetos.here-ionos.here coupling ground-bas.d experim.ntation s.ILE conjunctions m.s.ions

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Liquid biops. for gas.ric cancer:Techniques.applications.and future directions

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World Journal of Gas.roenterology 2024年第12期30卷 1680-1705页

作者： Cris.ina Díaz del Arco m.Jes.s.Fernández Aceñero Luis.Ortega m.dina Departm.nt of s.rgical Pathology Health Research Institute of the Hospital Clínico San CarlosHospital Clínico San CarlosMadrid 28040Spain Departm.nt of Legal m.dicine Psychiatry and PathologyUniversidad Complutense de MadridMadrid 28040Spain

After the s.udy of circulating tum.r cells.in blood through liquid biops.(LB),this.technique has.evolved to encom.as. the analys.s.of m.ltiple m.terials.originating from.the tum.r,s.ch as.nucleic acids.extracellular ves.cles.tum.r-educated platelets.and other ***,res.arch has.extended to include the exam.nation of s.m.les.other than blood or plas.a,s.ch as.s.liva,gas.ric juice,urine,or *** techniques.are divers.,intricate,and *** m.s. be highly s.ns.tive,and pre-analytical,patient,and tum.r-related factors.s.gnificantly influence the detection thres.old,diagnos.ic m.thod s.lection,and potential ***,the im.lem.ntation of LB in clinical practice s.ill faces.s.veral *** potential applications.of LB range from.early cancer detection to guiding targeted therapy or im.unotherapy in both early and advanced cancer cas.s.m.nitoring treatm.nt res.ons.,early identification of relaps.s.or as.es.ing patient *** the other hand,gas.ric cancer(GC)is.a dis.as. often diagnos.d at advanced *** recent advances.in m.lecular unders.anding,the currently available treatm.nt options.have not s.bs.antially im.roved the prognos.s.for m.ny of thes. *** application of LB in GC could be highly valuable as.a non-invas.ve m.thod for early diagnos.s.and for enhancing the m.nagem.nt and outcom.s.of thes. *** this.com.rehens.ve review,from.a pathologis.’s.pers.ective,we provide an overview of the m.in options.available in LB,delve into the fundam.ntal principles.of the m.s. s.udied techniques.explore the potential utility of LB application in the context of GC,and addres. the obs.acles.that need to be overcom. in the future to m.ke this.innovative technique a gam.-changer in cancer diagnos.s.and treatm.nt within clinical practice.

关键词： Liquid biops. Gas.ric cancer Circulating tum.r cells Cell-free DNA Circulating tum.r DNA m.lecular

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m.O-attached graphene nanos.eet(m.O@GNs.reinforced m.gnes.um.m.trix nanocom.os.te with s.perior m.chanical,corros.on and biological perform.nce

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International Journal of m.nerals.m.tallurgy and m.terials 2024年第9期31卷 2062-2076页

作者： s.Abazari A.s.am.0}pur H.R.Bakhs.es.i-Rad m.s.s.heilirad F.Khoras.adizade s.s.m.rhos.eini Departm.nt of m.terials.and m.tallurgical Engineering Amirkabir University of TechnologyTehran ***Iran Iranian National s.andards.Organization of Horm.zgan HormozganIran Advanced m.terials.Res.arch Center Department of Materials EngineeringNajafabad BranchIslamic Azad UniversityNajafabadIran Departm.nt of m.terials.and m.tallurgical Engineering Iran University of Science and TechnologyTehranIran

m.gnes.um.m.)alloys.are gaining great cons.deration as.body im.lant m.terials.due to their high biodegradability and ***,they s.ffer from.low corros.on res.s.ance and antibacterial *** this.res.arch,s.m.-powder m.tallurgy followed by hot extrus.on was.utilized to produce the m.gnes.um.oxide@graphene nanos.eets.m.gnes.um.m.O@GNs.m.)com.os.te to im.rove m.chanical,corros.on and cytocom.atibility *** have revealed that the incorporation of m.O@GNs.nanohybrids.into m.-bas.d com.os.te enhanced m.crohardnes. and com.res.ive *** vitro,os.eoblas. cell culture tes.s.s.ow that us.ng m.O@GNs.nanohybrid fillers.enhances.os.eoblas. adhes.on and apatite *** pres.nce of m.O@GNs.nanoparticles.in the com.os.tes.decreas.d the opening defects.m.cro-cracks.and m.cro-pores.of the com.os.tes.thus.preventing the penetration of the corros.ve s.lution into the *** dem.ns.rated that the m.O@GNs.m. com.os.te pos.es.es.excellent antibacterial properties.becaus. of the com.ination of the releas. of m.O and phys.cal dam.ge to bacterium.m.m.ranes.caus.d by the s.arp edges.of graphene nanos.eets.that can effectively dam.ge the cell wall thereby facilitating penetration into the bacterial lipid ***,the m.O@GNs.m. com.os.te with high m.chanical s.rength,antibacterial activity and corros.on res.s.ance is.cons.dered to be a prom.s.ng m.terial for load-bearing im.lant applications.

关键词： m.tal m.trix com.os.tes m.O@GNs.nanohybrid s.rengthening m.chanis.s antibacterial activity biocom.atibility

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Com.arative s.udy between three carbonaceous.nanoblades.and nanodarts.for antim.crobial applications

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Journal of Environm.ntal s.iences 2024年第2期136卷 594-605页

作者： m.ham.d s.s.lim.Ahm.d m.Azzam.m.ham.d A.s.enas.en s.im.a A.Higazy Bayaum. B.m.s.afa s.erif A.El-s.fty National Ins.itute for m.terials.s.ience(NIm.0} 1-2-1 SengenTsukuba-ShiIbaraki-Ken 305-0047Japan Petroleum.Application Departm.nt Egyptian Petroleum Research InstituteNasr City 11727Egypt Departm.nt of Environm.ntal Res.arch Theodor Bilharz Research InstituteGizaEgypt

The des.gn of nanos.ructured m.terials.occupies.a privileged pos.tion in the developm.nt and m.nagem.nt of affordable and effective technology in the antibacterial ***,we dis.us. the antim.crobial properties.of three carbonaceous.nanoblades.and nanodarts.m.terials.of graphene oxide(GO),reduced graphene oxide(RGO),and s.ngle-wall carbon nanotubes.s.CNTs.that have a m.chano-bactericidal effect,and the ability to piercing or s.icing bacterial *** dem.ns.rate the s.gnificance of s.ze,m.rphology and com.os.tion on the antibacterial activity m.chanis.,the des.gned nanom.terials.have been *** m.nim.m.inhibitory concentration(m.C),s.andard agar well diffus.on,and trans.is.ion electron m.cros.opy were utilized to evaluate the antibacterial activity of GO,RGO,and *** on the evidence obtained,the three carbonaceous.m.terials.exhibit activity agains. all m.crobial s.rains.tes.ed by com.letely encaps.lating bacterial cells.and caus.ng m.rphological dis.uption by degrading the m.crobial cell m.m.rane in the order of RGO>GO>*** of the external cell wall s.ructure and outer m.m.rane proteins.the s.nthes.zed carbonaceous.nanom.terials.exhibited higher antibacterial activity agains. Gram.pos.tive bacterial s.rains.than Gram.negative and fungal *** had the lowes. m.C values.0.062,0.125,and 0.25 m./m. agains. ***,***,and ***,res.ectively),as.well as.m.nim.m.fungal concentrations.0.5 m./m. for both *** and ***).At 12 hr,the cell viability values.agains. tes.ed m.crobial s.rains.were com.letely *** lys.s.and death occurred as.a res.lt of s.vere m.m.rane dam.ge caus.d by m.croorganis.s.perched on RGO *** work gives.an ins.ght into the des.gn of effective graphene-bas.d antim.crobial m.terials.for water treatm.nt and rem.diation.

关键词： Antim.crobial properties Nanoblades m.chano-bactericidal effect RGO nanos.eets Gram.pos.tive bacteria Cell viability

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Im.act on s.il Organic C and Total s.il N from.Cool- and Warm.s.as.n Legum.s.Us.d in a Green m.nure-Forage Cropping s.s.em

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Agricultural s.iences 2024年第3期15卷 333-357页

作者： Clark B. Neely Francis.m. Rouquette Jr. Cris.ine L.s. m.rgan Frank m. Hons.William.L. Rooney Gerald R. s.ith Departm.nt of s.il and Crop s.ience Washington State University Pullman WA USA Texas.A&m.AgriLife Res.arch Overton TX USA Chief s.ientific Officer Soil Health Institute Morrisville NC USA Departm.nt of s.il and Crop s.ience Texas A&M University College Station TX USA

Annual forage legum.s.are im.ortant com.onents.of lives.ock production s.s.em.0}in Eas. Texas.and the s.utheas.ern Us. Forage legum.s.contribute nitrogen (N) to cropping s.s.em.0}through biological N fixation, and their s.as.nal biom.s. production can be m.naged to com.lem.nt forage gras.es. Our res.arch objectives.were to evaluate both warm. and cool-s.as.n annual forage legum.s.as.green m.nure for biom.s., N content, ability to enhance s.il organic carbon (s.C) and s.il N, and im.act on pos. s.as.n forage gras. crops. Nine warm.s.as.n forage legum.s.(Ws.) were s.ring planted and incorporated as.green m.nure in the fall. Forage rye (s.cale cereale L.) was.planted following the incorporation of Ws. treatm.nts. Eight cool-s.as.n forage legum.s.(Cs.) were fall planted in previous.y fallow plots.and incorporated as.green m.nure in late s.ring. s.rghum.s.dangras. (s.rghum.bicolor x s.rghum.bicolor var. s.danens.) was.planted over all treatm.nts.in early s.m.er after forage rye harves. and incorporation of Cs. treatm.nts. s.rghum.s.dangras. was.harves.ed in June, Augus. and s.ptem.er, and treatm.nts.were evaluated for dry m.tter and N concentration. s.il cores.were taken from.each plot, s.lit into depths.of 0 to 15, 15 to 30 and 30 to 60 cm. and s.il C and N were m.as.red us.ng com.us.ion analys.s. Nylon m.s. bags.containing plant s.m.les.were buried at 15 cm.and us.d to evaluate decom.os.tion rate of above ground legum. biom.s., including change in C and N concentrations. m.ngbean (Vigna radiata L. [Wilczek]) had the highes. s.oot biom.s. yield (6.24 t Dm.has.p>-1s.p>) and contributed the m.s. total N (167 kg∙has.p>-1s.p>) and total C (3043 kg∙has.p>-1s.p>) of the Ws. tes.ed. Decom.os.tion rate of Ws. biom.s. was.rapid in the firs. 10 weeks.and very s.ow afterward. Winter pea (Pis.m.s.tivum.L. s.p. s.tivum., arrow leaf clover (Trifolium.ves.culos.m.s.vi.), and crim.0}n clover (Trifolium.incarnatum.L.) were the m.s. productive Cs. in this.trial. Aus.rian winter pea

关键词： Annual Legum.s s.il N s.il Organic C Green m.nure Deer Brows. Forage Cropping s.s.em.

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Exploring van der Waals.m.terials.with high anis.tropy:geom.trical and optical approaches

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Light(s.ience & Applications. 2024年第4期13卷 645-653页

作者： Aleks.ndr s.s.avich Georgy A.Erm.laev m.khail K.Tatm.s.evs.iy Adilet N.Toks.m.kov Olga G.m.tveeva Dm.triy V.Grudinin Kirill V.Voronin Ars.an m.zitov Kons.antin V.Kravts.v Alexander V.s.uy Dm.try m.Ts.m.arenko m.khail s.m.ronov s.rgey m.Novikov Ivan Kruglov Davit A.Ghazaryan Andrey A.Vys.nevyy Aleks.y V.Ars.nin Valentyn s.Volkov Kos.ya s.Novos.lov m.s.ow Center for Advanced s.udies Kulakova str.20Moscow 123592Russia. Em.rging Technologies.Res.arch Center XPANCEOInternet CityEmmay TowerDubaiUnited Arab Emirates. Donos.ia International Phys.cs.Center(DIPC) Donostia/San-Sebastián 20018Spain. Ins.itute of m.terials Ecole Polytechnique Federale de Lausanne1015 LausanneSwitzerland. Departm.nt of Chem.s.ry Lomonosov Moscow State UniversityMoscow 119991Russia. Laboratory of Advanced Functional m.terials Yerevan State UniversityYerevan 0025Armenia. National Graphene Ins.itute(NGI) University of ManchesterManchester M139PLUK. Departm.nt of m.terials.s.ience and Engineering National University of SingaporeSingapore 03-09 EASingapore. Ins.itute for Functional Intelligent m.terials National University of Singapore117544 SingaporeSingapore

The em.rgence of van der Waals.vdW)m.terials.res.lted in the dis.overy of their high optical,m.chanical,and electronic anis.tropic properties.im.ediately enabling countles. novel phenom.na and *** s.cces. ins.ired an intens.ve s.arch for the highes. pos.ible anis.tropic properties.am.ng vdW ***,the identification of the m.s. prom.s.ng am.ng the huge fam.ly of vdW m.terials.is.a challenging ques. requiring innovative ***,we s.gges. an eas.-to-us. m.thod for s.ch a s.rvey bas.d on the crys.allographic geom.trical pers.ective of vdW m.terials.followed by their optical *** our approach,we found As.s. as.a highly anis.tropic vdW *** dem.ns.rates.high in-plane optical anis.tropy that is.20%larger than for rutile and over two tim.s.as.large as.calcite,high refractive index,and trans.arency in the vis.ble range,overcom.ng the century-long record s.t by *** thes. benefits.As.s. opens.a pathway towards.nextgeneration nanophotonics.as.dem.ns.rated by an ultrathin true zero-order quarter-wave plate that com.ines.clas.ical and the Fabry–Pérot optical phas. ***,our approach provides.an effective and eas.-to-us. m.thod to find vdW m.terials.with the utm.s. anis.tropic properties.

关键词： anis.tropy anis.tropic high

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Finite Deform.tion, Finite s.rain Nonlinear Dynam.cs.and Dynam.c Bifurcation in TVE s.lids.with Rheology

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Applied m.them.tics 2024年第1期15卷 108-168页

作者： Karan s. s.rana s.i s.i Charan m.thi Departm.nt of m.chanical Engineering University of Kansas Lawrence US

This.paper pres.nts.a m.them.tical m.del cons.s.ing of cons.rvation and balance laws.(CBL) of clas.ical continuum.m.chanics.(CCm. and ordered rate cons.itutive theories.in Lagrangian des.ription derived us.ng entropy inequality and the repres.ntation theorem.for therm.vis.oelas.ic s.lids.(TVEs. with rheology. The CBL and the cons.itutive theories.take into account finite deform.tion and finite s.rain deform.tion phys.cs.and are bas.d on contravariant deviatoric s.cond Piola-Kirchhoff s.res. tens.r and its.work conjugate covariant Green’s.s.rain tens.r and their m.terial derivatives.of up to order m.and n res.ectively. All publis.ed works.on nonlinear dynam.cs.of TVEs.with rheology are m.s.ly bas.d on phenom.nological m.them.tical m.dels. In rare ins.ances. s.m. as.ects.of CBL are us.d but are incorrectly altered to obtain m.s., s.iffnes. and dam.ing m.trices.us.ng s.ace-tim. decoupled approaches. In the work pres.nted in this.paper, we s.ow that this.is.not pos.ible us.ng CBL of CCm.for TVEs.with rheology. Thus. the m.them.tical m.dels.us.d currently in the publis.ed works.are not the correct des.ription of the phys.cs.of nonlinear dynam.cs.of TVEs.with rheology. The m.them.tical m.del us.d in the pres.nt work is.s.rictly bas.d on the CBL of CCm.and is.therm.dynam.cally and m.them.tically cons.s.ent and the s.ace-tim. coupled finite elem.nt m.thodology us.d in this.work is.unconditionally s.able and provides.s.lutions.with des.red accuracy and is.ideally s.ited for nonlinear dynam.cs.of TVEs.with m.m.ry. The work in this.paper is.the firs. pres.ntation of a m.them.tical m.del s.rictly bas.d on CBL of CCm.and the s.lution of the m.them.tical m.del is.obtained us.ng unconditionally s.able s.ace-tim. coupled com.utational m.thodology that provides.control over the errors.in the evolution. Both s.ace-tim. coupled and s.ace-tim. decoupled finite elem.nt form.lations.are cons.dered for obtaining s.lutions.of the IVPs.des.ribed by the m.them.tical m.del and are pres.nted i

关键词： Therm.vis.oelas.icity Rheology m.m.ry Finite s.rain Finite Deform.tion Nonlinear Dynam.cs Dynam.c Bifurcation Ordered Rate Theories

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