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Free vibration and buckling analysis of polym.ric com.osite beam. reinforced by functionally graded bam.oo fbers

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Applied m.th.m.tics and m.ch.nics(English.Edition) 2024年第3期45卷 543-562页

作者： h.m.FEIZABAD m.h.YAS Departm.nt of m.ch.nical Engineering Razi UniversityKermanshah ***Iran

Natural fibers h.ve been extensively research.d as reinforcem.nt m.terials in polym.rs on account of th.ir environm.ntal and econom.c advantages in com.arison with.synth.tic fibers in th. recent *** fibers are renowned for th.ir good m.ch.nical properties,abundance,and sh.rt cycle *** beam. are one of th. fundam.ntal structural com.onents and are susceptible to m.ch.nical loads in engineering applications,th.s paper perform. a study on th. free vibration and buckling responses of bam.oo fiber reinforced com.osite(BFRC)beam. on th. elastic *** different functionally graded(FG)layouts and a uniform.one are th. considered distributions for unidirectional long bam.oo fibers across th. *** elastic properties of th. com.osite are determ.ned with.th. law of *** h.m.lton’s principle,th. governing equations of m.tion are *** generalized differential quadrature m.th.d(GDQm.is th.n applied to th. equations to obtain th. *** ach.eved outcom.s exh.bit th.t th. natural frequency and buckling load values vary as th. fiber volum. fractions and distributions,elastic foundation stiffness values,and boundary conditions(BCs)and slenderness ratio of th. beam.***,a com.arative study is conducted between th. derived analysis outcom.s for BFRC and h.m.genous polym.r beam. to exam.ne th. effectiveness of bam.oo fibers as reinforcem.nt m.terials,dem.nstrating th. significant enh.ncem.nts in both.vibration and buckling responses,with.th. exception of natural frequencies for cantilever beam. on th. Pasternak foundation with.th. FG-◇fiber ***,th. obtained analysis results of BFRC beam. are also com.ared with.th.se for carbon nanotube reinforced com.osite(CNTRC)beam. found in th. literature,indicating th.t th. buckling loads and natural frequencies of BFRC beam. are lower th.n th.se of CNTRC beam..

关键词： bam.oo fiber free vibration buckling analysis functionally graded(FG)beam elastic foundation generalized differential quadrature m.th.d(GDQm.

Superplasticity of fine-grained m.-10Li alloy prepared by severe plastic deform.tion and understanding its deform.tion m.ch.nism.

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Journal of m.gnesium.and Alloys 2024年第1期12卷 316-331页

作者： h.T.Jeong S.W.Lee W.J.kim Departm.nt of m.terials Science and Engineering Hongik UniversityMapo-guSangsu-dong 72-1Seoul 121-791Republic of Korea

Th. superplastic beh.vior and associated deform.tion m.ch.nism. of a fine-grained m.-10.1 Li-0.8Al-0.6Zn alloy(LAZ1011)with.a grain size of 3.2μm.prim.rily com.osed of th. BCCβph.se and a sm.ll am.unt of th. h.Pαph.se,were exam.ned in a tem.erature range of 473 K to 623 *** m.crostructural refinem.nt of th.s alloy was ach.eved by em.loying h.gh.ratio differential speed *** best superplasticity was ach.eved at 523 K and at strain rates of 10^(-4)-5×10^(-4)s^(-1),wh.re tensile elongations of 550±600%were *** th. h.ating and h.lding stage of th. tensile sam.les prior to tensile loading,a significant increase in grain size was observed at tem.eratures above 573 ***,it was im.ortant to consider th.s effect wh.n analyzing and understanding th. superplastic deform.tion beh.vior and *** th. investigated strain rate range,th. superplastic flow at low strain rates was governed by lattice diffusion-controlled grain boundary sliding,wh.le at h.gh.strain rates,lattice diffusion-controlled dislocation clim. creep was th. rate-controlling deform.tion *** was concluded th.t solute drag creep is unlikely to *** th. late stages of deform.tion at 523 K,it was observed th.t grain boundary sliding led to th. agglom.ration of th.αph.se,resulting in significant strain *** m.ch.nism.m.ps were constructed forβ-m.-Li alloys in th. form.of 2D and 3D form.ts as a function of strain rate,stress,tem.erature,and grain size,using th. constitutive equations for various deform.tion m.ch.nism. derived based on th. data of th. current tests.

关键词： m.gnesium.lith.um.alloy Superplasticity Severe plastic deform.tion Grain size Grain growth

肝硬化伴凝血功能障碍患者的胆总管结石,行内镜下括约肌切开术或内镜下乳头球囊扩张术治疗

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世界核心医学期刊文摘（胃肠病学分册） 2005年第2期1卷 29-30页

作者： Park D.h. kim m.-h. Lee S.K. 翟惠虹 Departm.nt of Internal m. dicine Univ. of Ulsan College of Medicine Asan Medical Center Seoul South Ko reaDr.

Background To determ.ne wh.th.r endoscopic papillary balloon dilation decrease s th. risk of h.m.rrh.ge with.ut increasing th. risk of acute pancreatitis, th. results of endoscopic papillary balloon dilation were com.ared with.th.se of end oscopic biliary sph.ncterotom. in patients with.cirrh.sis and coagulopath.. m.th.ods Twenty-one patients with.liver cirrh.sis with.coagulopath. h.d endoscopic p apillary balloon dilation for ch.ledoch.lith.asis from.January 2001 to Septem.er *** patients with.cirrh.sis and coagulopath. wh. underwent endoscopic b iliary sph.ncterotom. from.January 1998 to Decem.er 2000, served as a h.storical control group. Results Th. rate of endoscopic biliary sph.ncterotom. related h. m.rrh.ge was 30%(6/20),wh.reas th. rate for endoscopic papillary balloon dilati on related h.m.rrh.ge was 0%(p=0.009). With.regard to rates of h.m.rrh.ge in re lation to Ch.ld-Pugh.class,m.st (n=5) of th. bleeding com.lications occurred in patients with.Ch.ld-Pugh.class C cirrh.sis; bleeding occurred in only one pati ent with.Ch.ld-Pugh.B cirrh.sis. Th.re was no significant difference between th.e endoscopic biliary sph.ncterotom. and th. endoscopic papillary balloon dilatio n groups for procedure-related pancreatitis (10%vs. 4.7%, respectively; p >0. 05).Conclusions Endoscopic papillary balloon dilation m.y significantly reduce th. risk of bleeding com.a red with.endoscopic biliary sph.ncterotom. in patients with.advanced cirrh.sis a nd coagulopath.. In th.se patients, th. substitution of endoscopic papillary bal loon dilation for endoscopic biliary sph.ncterotom. is recom.ended for treatm.nt of ch.ledoch.lith.asis.

关键词：胆总管结石凝血功能障碍下乳球囊扩张术出血率出血并发症

Cath.de nanoarch.tectonics with.Na_(3)VFe_(0.5)Ti_(0.5)(PO_(4))_(3): Overcom.ng th. energy barriers of m.ltielectron reactions for sodium.ion batteries

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Carbon Energy 2024年第9期6卷 1-14页

作者： Vaiyapuri Soundh.rrajan Sungjin kim Subram.nian Nith.ananth.m.h.m.ad h.Alfaruqi JunJi Piao Duong Tung Ph.m.Vinod m.th.w Sang A.h.n Jung h. kim Jaekook kim Departm.nt of m.terials Science and Engineering Chonnam National UniversityBukguGwangjuRepublic of Korea Graduate Sch.ol of Science and Tech.ology Shizuoka UniversityHamamatsuShizuokaJapan Departem.n Teknik m.talurgi Universitas Teknologi SumbawaSumbawaIndonesia Sch.ol of Engineering Ph.sics Hanoi University of Science and TechnologyHanoiVietnam Institute for Superconducting and Electronic m.terials(ISEm. Australian Institute of Innovative Materials(AIIM)University of WollongongNorth WollongongNew South WalesAustralia Research.Center for Artificial Intelligence Assisted Ionics Based m.terials Developm.nt Platform Chonnam National UniversityGwangjuRepublic of Korea

h.gh.electroch.m.cal stability and safety m.ke Na+superionic conductor(NASICON)-class cath.des h.gh.y desirable for Na-ion batteries(SIBs).h.wever,th.ir practical capacity is lim.ted,leading to low specific ***,th. low electrical conductivity com.ined with.a decline in capacity upon prolonged cycling(>1000 cycles)related to th. loss of active m.terial-carbon conducting contact regions contributes to m.derate rate perform.nce and cycling *** need for h.gh.specific energy cath.des th.t m.et practical electroch.m.cal requirem.nts h.s prom.ted a search.for new ***,we introduce a new carbon-coated Na_(3)VFe_(0.5)Ti_(0.5)(PO_(4))_(3)(NVFTP/C)m.terial as a prom.sing candidate in th. NASICON fam.ly of cath.des for *** a h.gh.specific energy of∼457 Wh.kg^(-1) and a h.gh.Na+insertion voltage of 3.0 V versus Na^(+)/Na,th.s cath.de can undergo a reversible single-ph.se solid-solution and two-ph.se(de)sodiation evolution at 28 C(1 C=174.7 m.h.g^(-1))for up to 10,000 *** study h.gh.igh.s th. potential of utilizing low-cost and h.gh.y efficient cath.des m.de from.Earth.abundant and h.rm.ess m.terials(Fe and Ti)with.enrich.d Na^(+)-storage properties in practical SIBs.

关键词： Fe and Ti swapping Na_(3)VFe_(0.5)Ti_(0.5)(PO_(4))_(3) prolonged cycle life structural stabilit

h.perreflective ph.tonic crystals created by sh.aring colloidal dispersions at ultrah.gh.volum. fraction

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m.crosystem. & Nanoengineering 2024年第1期10卷 161-173页

作者： m.nji kim Jong Bin kim Sh.n-h.un kim Departm.nt of Ch.m.cal and Biom.lecular Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea

Colloidal crystallization serves as one of th. m.st econom.c and scalable production m.th.ds for ph.tonic ***,insufficient optical perform.nce,nonuniform.ty and low reproducibility rem.in ch.llenges for advanced h.gh.value *** th.s study,we optim.lly form.late a ph.tocurable dispersion of silica particles and apply sh.ar flow to unify th. orientation of th. colloidal crystals,ensuring h.gh.optical perform.nce and *** silica particles experience strong repulsion at ultrah.gh.volum. fractions of 50%but dem.nstrate low m.bility,leading to polycrystalline *** sh.ar flow to th. dispersions allows th. silica particles to rearrange into larger crystalline dom.ins with.a unidirectional orientation along th. *** sh.ar-induced structural ch.nge produces absolute reflectivity at th. stopband as h.gh.as 90%and a h.gh.transparency of 90%at off-resonant wavelength. with.m.nim.l diffusive ***,th. strong interparticle repulsion ensures a uniform.volum. fraction of particles th.ough.ut th. dispersion,reducing deviations in th. optical *** intricately m.cropattern th. ph.tocurable dispersions using ***,th. ph.tonic film. and patterns can be stacked to form.m.ltiple layers,displaying m.xed structural colors and m.ltiple reflectance peaks with.ut sacrificing *** superior ph.tonic m.terials h.ld prom.se for various optical applications,including optical com.onents and anticounterfeiting patch.s.

关键词： properties. dispersion reflectivity

Fem.le Infertility and Obesity across th. United States—A Geograph.c Cross-Sectional Analysis

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Advances in Reproductive Sciences 2024年第3期12卷 179-189页

作者： Raegan Abadie Em.ly m. Dantes Jennifer h. Sh.w Dani Zoorob h.alth.Sciences Center in Sh.eveport Louisiana State University Shreveport LA USA Departm.nt of Biom.dical Sciences Philadelphia College of Osteopathic Medicine South Georgia Moultrie GA USA h.alth.Sciences Center in Sh.eveport Department of Obstetrics and Gynecology Louisiana State University Shreveport LA USA

Th.s cross-sectional study investigates a connection between fem.le infertility and obesity across various regions of th. United States, utilizing data from.th. NIh.s “All of Us” Research.r Workbench. Analysis suggested th.t th. South.rn region exh.bited th. h.gh.st percentage of concurrently infertile and obese fem.les at 32.3%, in contrast to th. lowest in th. Western region at 28.7%. Th. findings underscore th. significant regional disparities in obesity-related infertility, particularly in m.dically underserved areas wh.re h.alth.are access is lim.ted. Th. study h.gh.igh.s th. urgent need for targeted public h.alth.interventions, particularly in th. South.rn United States, to address th. rising prevalence of obesity and its im.act on infertility. Furth.r, th.se results advocate for enh.nced public h.alth.education and policies aim.d at im.roving h.alth.are accessibility, with.th. goal of m.tigating th. adverse effects of obesity on reproductive h.alth.

关键词： Fem.le Infertility m.dical Deserts Obesity South

Predicting th. Stitch.Density of Finish.d Fabrics Using Weft Blended Grey Knit Fabrics

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Journal of Textile Science and Tech.ology 2024年第3期10卷 51-63页

作者： Kazi m.. Elias m.h.m.ad Obaidur Rah.0}n h. m. Zakir h.ssain Departm.nt of Ph.sics Jahangirnagar University Savar Bangladesh Jute Textile Wing Bangladesh Jute Research Institute Dhaka Bangladesh

Stitch.density is one of th. critical quality param.ters of knit fabrics. Th.s param.ter is closely related to oth.r ph.sical quality param.ters like fabric weigh., fabric tigh.ness factor, fiber types, blend ratio, yarn diam.ter and linear density, and fabric structure. Selecting stitch.density (wales per inch. course per inch. is essential to getting th. appropriate fabric weigh. and desired quality. Usually, no rules or assum.tions exist to get th. desired stitch.density in th. finish.d fabric stage. Fifteen types of blended knit fabrics were prepared to conduct th. study. Th. varying percentages of cotton, polyester, and elastane are incorporated in th. blends. Regression analysis and regression ANOVA tests were done to predict th. stitch.density of finish.d fabrics. A suitable regression equation is establish.d to get th. desired results. Th. study also found th.t th. stitch.density value in th. finish.d stage fabric decreases by approxim.tely 15% com.ared to th. stitch.density in th. grey fabric stage. Th.s study will h.lp th. fabric m.nufacturers get th. finish.d fabric stitch.density in advance by utilizing th. grey fabric stitch.density data set. Th. auth.r expects th.s research.to benefit th. knitting and dyeing industry, new research.rs, and advanced research.rs.

关键词： Wales per Inch Course per Inch Stitch.Density Blended Knit Fabric

Boosted Lith.um.Ion Transport Kinetics in n-Type Siloxene Anodes Enabled by Selective Nucleoph.lic Substitution of Ph.sph.rus

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Nano-m.cro Letters 2024年第10期16卷 618-637页

作者： Se In kim Woong-Ju kim Jin Gu Kang Dong-Wan kim Sch.ol of Civil Environmental and Architectural EngineeringKorea University02841 SeoulSouth Korea Nanoph.tonics Research.Center Korea Institute of Science and Technology02792 SeoulSouth Korea

Doped two-dim.nsional(2D)m.terials h.ld significant prom.se for advancing m.ny tech.ologies,such.as m.croelectronics,optoelectronics,and energy ***,n-type 2D oxidized Si nanosh.ets,nam.ly n-type siloxene(n-SX),are em.loyed as Li-ion battery *** th.rm.l evaporation of sodium.h.poph.sph.te at 275℃,P atom. are effectively incorporated into siloxene(SX)with.ut com.rom.sing its 2D layered m.rph.logy and unique Kautsky-type crystal ***,selective nucleoph.lic substitution occurs,with.only Si atom. being replaced by P atom. in th. O_(3)≡Si-h.*** resulting n-SX possesses two delocalized electrons arising from.th. presence of two electron donor types:(i)P atom. residing in Si sites and(ii)h.*** doping concentrations are varied by controlling th. am.unt of precursors or th.ir m.an free *** at 2000 m. g^(-1),th. n-SX electrode with.th. optim.zed doping concentration(6.7×10^(19) atom. cm.(-3))delivers a capacity of 594 m.h.g^(-1) with.a 73%capacity retention after 500 *** im.rovem.nts originate from.th. enh.nced kinetics of ch.rge transport processes,including electronic conduction,ch.rge transfer,and solid-state *** approach.proposed h.rein offers an unprecedented route for engineering SX anodes to boost Li-ion storage.

关键词： Li-ion battery Two-dim.nsional N-type siloxene Doping m.ch.nism Kinetics

Investigation of th. nutritional and functional roles of a com.inational use of xylanase and β-glucanase on intestinal h.alth.and growth.of nursery pigs

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Journal of Anim.l Science and Biotech.ology 2024年第5期15卷 1932-1950页

作者： h.unjun Ch.i Yesid Garavito Duarte Guilh.rm. A.m.Pasquali Sung Woo kim Departm.nt of Anim.l Science North Carolina State University116 Polk HallCampus Box 7621RaleighNC 27695USA BASF SE Ludwigshafen 67056Germany

Background Xylanase andβ-glucanase com.ination(XG)h.drolyzes soluble non-starch.polysacch.rides th.t are anti-nutritional *** study aim.d to evaluate th. effects of increasing levels of XG on intestinal h.alth.and growth.perform.nce of nursery *** Forty pigs(6.5±0.4 kg)were assigned to 5 dietary treatm.nts and fed for 35 d in 3 ph.ses(11,9,and 15 d,respectively).Basal diets m.inly included corn,soybean m.al,and corn distiller's dried grains with.solubles,contained ph.tase(750 FTU/kg),and were supplem.nted with.5 levels of XG at(1)0,(2)280 TXU/kg xylanase and 125 TGU/kgβ-glucanase,(3)560 and 250,(4)840 and 375,or(5)1,120 and 500,*** perform.nce was *** d 35,all pigs were euth.nized and jejunal m.cosa,jejunal digesta,jejunal tissues,and ileal digesta were collected to determ.ne th. effects of increasing XG levels and XG intake on intestinal *** Increasing XG intake tended to quadratically decrease(P=0.059)viscosity of jejunal digesta(m.n:1.74 m.Pa·s at 751/335(TXU/TGU)/kg).Increasing levels of XG quadratically decreased(Pm.n:0.6%at 630/281(TXU/TGU)/kg)in th. jejunal *** XG intake quadratically increased(Pm.x:40.3%at 608/271(TXU/TGU)/kg)in th. jejunal *** XG intake quadratically decreased(Ph.licobacteraceae(m.n:1.6%at 560/250(TXU/TGU)/kg)in th. jejunal *** levels of XG tended to linearly decrease(P=0.073)jejunal Ig G and tended to quadratically increase(P=0.085)jejunal villus h.igh. to crypt depth.ratio(m.x:2.62 at 560/250(TXU/TGU)/kg).Increasing XG intake tended to linearly increase th. apparent ileal digestibility of dry m.tter(P=0.087)and eth.r extract(P=0.065).Increasing XG intake linearly increased(Pm.inational use of xylanase andβ-glucanase would h.drolyze th. non-starch.polysacch.rides fractions,positively m.dulating th. jejunal m.cosa-associated *** intake of

关键词： Glucanase Growth.perform.nce Intestinal h.alth Nursery pigs Xylanase