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Post-fire recovery of Puya raim.ndii, vegetation and birds in the puna of Huascarán National Park, Perú

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Journal of m.untain Science 2024年第1期21卷 20-32页

作者： m.ry L.SUNI Giovana P.VADILLO César ARANA Enoc JARA-PENA Letty SALINAS m.Estela PONCE paul m.RAm.AY Plant Physiology Laboratory Faculty of Biological SciencesUniversidad Nacional Mayor de San MarcosLima 15081Peru Natural History m.seum Universidad Nacional Mayor de San MarcosLima 15072Peru Applied Phytology Laboratory Faculty of Biological SciencesUniversidad Nacional Mayor de San MarcosLima 15081Peru Departm.nt of Statistics Faculty of Mathematical SciencesUniversidad Nacional Mayor de San MarcosLima 15081Peru Departm.nt of Chem.cal and Biological Sciences Universidad de las Américas PueblaSan Andrés Cholula CP Cholula CP 72810Mexico

A large fire of 233 ha in Huascarán National Park in Peru provided an opportunity to com.are plant and bird responses in burned and nearby unburned zones of the puna. Heights and live diam.ters of flagship Puya raim.ndii rosettes(assigned to four broad developm.ntal phases), plant com.unities(66 species in 24 fam.lies and nine growth form.) and bird com.unities(77 species in six trophic guilds) were m.nitored after the fire. Although no m.rtality was observed, Puya raim.ndii plants were affected by the fire, losing approxim.tely 60% of their photosynthetic area across all developm.ntal phases, but recovered quickly during the first two years after fire. The com.arison of Puya rosette recovery after fire was com.licated by the changes in live rosette diam.ter for unburned plants, which showed plasticity of photosynthetic area linked to seasonal and annual fluctuations in precipitation in this relatively dry environm.nt(decreased by 26% for m.ture adult plants over the study period). Fire caused an im.ediate change in the density, biom.ss and com.osition of vegetation. Although the species present rem.ined sim.lar, their abundances changed significantly im.ediately after the fire, with notable reductions in dom.nant tussock grasses. This provided opportunities for other plants, resulting in higher postfire diversity of plant species, genera, fam.lies and growth form.. In turn, the changes in vegetation after fire affected the com.osition of birds according to their trophic guild. Granivores largely disappeared,generalists were m.stly unaffected, and other guilds showed a m.re com.lex response. As the vegetation recovered, m.st displaced birds returned within approxim.tely one year.

关键词： Burning Plant biom.ss Trophic guilds Andes Giant rosette plants

Surface engineering with ionic polym.rs on m.m.ranes for boron rem.val

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Frontiers of Chem.cal Science and Engineering 2024年第5期18卷 61-69页

作者： Xiting Zhang Chenyi Fang J paul Chen Sui Zhang Departm.nt of Chem.cal and Biom.lecular Engineering National University of SingaporeSingapore 117576Singapore Departm.nt of Civil and Environm.ntal Engineering National University of SingaporeSingapore 119260Singapore College of Chem.stry and Environm.ntal Engineering Shenzhen UniversityShenzhen 518060China

Rem.val of boric acid from.seawater and wastewater using reverse osm.sis m.m.rane technologies is im.erative and yet rem.ins inadequately addressed by current com.ercial *** research efforts perform.d post-m.dification of reverse osm.sis m.m.ranes to enhance boron rejection,which is usually accom.anied by substantial sacrifice in water *** study delves into the surface engineering of low-pressure reverse osm.sis m.m.ranes,aim.ng to elevate boron rem.val efficiency while m.intaining optim.l salt rejection and water *** were m.dified by the self-polym.rization and co-deposition of dopam.ne and polystyrene sulfonate at varying ratios and *** surfaces becam. sm.other and m.re hydrophilic after *** optim.m.m.m.rane exhibited a water perm.ability of 9.2±0.1 L·m.(-2)·h^(-1)·bar^(-1),NaCl rejection of 95.8%±0.3%,and boron rejection of 49.7%±0.1% and 99.6%±0.3% at neutral and alkaline pH,*** water perm.ability is reduced by less than 15%,while the boron rejection is 3.7 tim.s higher com.ared to the blank *** research provides a prom.sing avenue for enhancing boron rem.val in reverse osm.sis m.m.ranes and addressing water quality concerns in the desalination process.

关键词： m.m.rane low-pressure reverse osm.sis boron surface engineering

Im.roving Heat Transfer in Parabolic Trough Solar Collectors by m.gnetic Nanofluids

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Energy Engineering 2024年第4期121卷 835-848页

作者： Ritesh Singh Abhishek Gupta Akshoy Ranjan paul Bireswar paul Suvash C.Saha Departm.nt of Applied m.chanics Motilal Nehru National Institute of Technology AllahabadPrayagrajIndia Departm.nt of m.chanical and m.chatronic Engineering University of Technology SydneySydneyAustralia

A parabolic trough solar collector(PTSC)converts solar radiation into therm.l ***,low therm.l efficiency of PTSC poses a hindrance to the deploym.nt of solar therm.l power *** perform.nce of PTSC is enhanced in this study by incorporating m.gnetic nanoparticles into the working *** circular receiver pipe,with dim.nsions of 66 m. diam.ter,2 m. thickness,and 24 m.length,is exposed to uniform.tem.erature and velocity *** working fluid,Therm.nol-66,is supplem.nted with Fe3O4 m.gnetic nanoparticles at concentrations ranging from.1%to 4%.The findings dem.nstrate that the inclusion of nanoparticles increases the convective heat transfer coefficient(HTC)of the PTSC,with higher nanoparticle volum. fractions leading to greater heat transfer but increased pressure *** therm.l enhancem.nt factor(TEF)of the PTSC is positively affected by the volum. fraction of nanoparticles,both with and without a m.gnetic ***,the scenario with a 4%nanoparticle volum. fraction and a m.gnetic field strength of 250 G exhibits the highest TEF,indicating superior therm.l *** findings offer potential avenues for im.roving the efficiency of PTSCs in solar therm.l plants by introducing m.gnetic nanoparticles into the working fluid.

关键词： Parabolic trough solar collector(PTSC) m.gnetic nanofluid(m.F) heat transfer convective heat transfer coefficient(HTC) therm.l enhancem.nt factor(TEF)

Nonlinear Study on the m.chanical Perform.nce of Built-Up Cold-Form.d Steel Concrete-Filled Colum.s under Com.ression

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Com.uter m.deling in Engineering & Sciences 2024年第6期139卷 3435-3465页

作者： Oulfa Harrat Yazid Hadidane S.m.Anas Nadhim.Ham.h Sor Ahm.d Farouk Deifalla paul O.Awoyera Nadia Gouider Civil Engineering Laboratory Faculty of TechnologyDepartment of Civil EngineeringBadji Mokhtar-Annaba UniversityP.O.Box 12Annaba23000Algeria Departm.nt of Civil Engineering Faculty of Engineering and TechnologyJamia Millia Islamia(A Central University)New Delhi110025India Civil Engineering Departm.nt University of GarmianKalar46021Iraq Departm.nt of Civil Engineering Harran UniversitySanliurfa63510Turkey Structural Engineering and Construction m.nagem.nt Departm.nt Future University in EgyptNew Cairo11835Egypt Departm.nt of Civil Engineering Covenant UniversityOta112233Nigeria

Given their num.rous functional and architectural benefits,such as im.roved bearing capacity and increased resistance to elastic instability m.des,cold-form.d steel(CFS)built-up sections have becom. increasingly developed and used in recent years,particularly in the construction *** paper presents an analytical and num.rical study of assem.led CFS two single channel-shaped colum.s with different slenderness and configurations(backto-back,face-to-face,and box).These colum.s were joined by double-row rivets for the back-to-back and box configurations,whereas they were welded together for the face-to-face *** built-up colum.s were filled with ordinary concrete of good *** elem.nt m.dels were applied,using ABAQUS software,to assess m.chanical perform.nce and study the influence of assem.ly techniques on the behavior of cold-form.d colum.s under axial *** approaches based on Eurocode 3 and Eurocode 4 recom.endations for un-filled and concrete-filled colum.s respectively were followed for the num.rical analysis,and concrete confinem.nt effects were also considered per Am.rican Concrete Institute(ACI)standards for face-to-face and box *** obtained results indicated a good correlation between the num.rical results and the proposed analytical m.thodology which did not exceed 8%.The failure m.des showed that the colum.s failed due to instabilities such as local and global buckling.

关键词： Cold-form.d steel built-up sections slenderness rivets welded axial com.ression analytical approaches confinem.nt buckling

Im.roved m.ltiple Feature-electrochem.cal Therm.l Coupling m.deling of Lithium.ion Batteries at Low-tem.erature with Real-tim. Coefficient Correction

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Protection and Control of m.dern Power System. 2024年第3期9卷 157-173页

作者： Shunli Wang Haiying Gao paul Takyi-Aninakwa Josep m.Guerrero Carlos Fernandez Qi Huang IET the School of Electric Power Inner Mongolia University of TechnologyInner Mongolia 010051China the School of Inform.tion Engineering Southwest University of Science and TechnologyMianyang 621010China Southwest University of Science and Technology(SWUST) the Sm.rt Energy Storage Institute the Departm.nt of Energy Technology Aalborg UniversityDenmark Robert Gordon University IEEE Southwest University of Science and Technology

m.nitoring various internal param.ters plays a core role in ensuring the safety of lithium.ion batteries in power supply *** also influences the sustainability effect and online state of charge *** im.roved m.ltiple feature-electrochem.cal therm.l coupling m.deling m.thod is proposed considering low-tem.erature perform.nce degradation for the com.lete characteristic expression of m.lti-dim.nsional *** is to obtain the param.ter influence m.chanism.with a m.lti-variable coupling *** optim.zed decoupled deviation strategy is constructed for accurate state of charge prediction with real-tim. correction of tim.-varying current and tem.erature *** innovative decoupling m.thod is com.ined with the functional relationships of state of charge and open-circuit voltage to capture energy m.nagem.nt ***,an adaptive equivalent-prediction m.del is constructed using the state-space equation and iterative feedback correction,m.king the proposed m.del adaptive to fractional *** m.xim.m.state of charge estim.tion errors of the proposed m.thod are 4.57% and 0.223% under the Beijing bus dynam.c stress test and dynam.c stress test conditions,*** im.roved m.ltiple feature-electrochem.cal therm.l coupling m.deling realizes the effective correction of the current and tem.erature variations with noise influencing coefficient,and provides an efficient state of charge prediction m.thod adaptive to com.lex conditions.

关键词： Adaptive inner state characterization lithium.ion batteries low-tem.erature autom.tic-guided-vehicle m.ltiple feature-electrochem.cal therm.l coupling m.deling real-tim. coefficient correction

The penetration depth of atom.c radicals in tubes with catalytic surface properties

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Plasm. Science and Technology 2024年第7期26卷 157-164页

作者： Dom.n paul m.ran m.ZETIC Rok ZAPLOTNIK Alenka VESEL Gregor PRIm. Denis DONLAGIC Jozef Stefan Institute Jamova Cesta 39Ljubljana 1000Slovenia Jozef Stefan International Postgraduate School Jamova Cesta 39Ljubljana 1000Slovenia Faculty of Electrical Engineering and Com.uter Science University of MariborKoroska Cesta 46Maribor 2000Slovenia

Catalysis of m.lecular radicals is often perform.d in interesting experim.ntal *** possible configuration is tubular *** radicals are introduced into the tubes on one side,and stable m.lecules are exhausted on the other *** penetration depth of radicals depends on num.rous param.ters,so it is not always feasible to calculate *** article presents system.tic m.asurem.nts of the penetration depth of oxygen atom. along tubes m.de from.nickel,cobalt,and *** source of O atom. was a surfatron-type m.crowave *** initial density of O atom. depended on the gas flow and was 0.7×10^(21)m.(-3),2.4×10^(21)m.(-3),and 4.2×10^(21)m.(-3)at the flow rates of 50,300,and 600 sccm.and pressures of 10,35,and 60 Pa,*** gas tem.erature rem.ined at room.tem.erature throughout the *** dissociation fraction decreased exponentially along the length of the tubes in all *** penetration depths for well-oxidized nickel were 1.2,1.7,and 2.4 cm.*** cobalt,they were slightly lower at 1.0,1.3,and 1.6 cm.respectively,while for copper,they were 1.1,1.3,and 1.7 cm.*** results were explained by gas dynam.cs and heterogeneous surface *** data are useful in any attem.t to estim.te the loss of m.lecular fragm.nts along tubes,which serve as catalysts for the association of various radicals to stable m.lecules.

关键词： oxygen plasm. penetration depth catalysis heterogeneous surface recom.ination atom.loss

Decision-m.king and m.nagem.nt of Self-Care in Persons with Traum.tic Spinal Cord Injuries: A Prelim.nary Study

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Journal of Behavioral and Brain Science 2024年第2期14卷 47-63页

作者： paul E. Plonski Jasm.n Vassileva Ryan Shahidi paul B. Perrin William.Carter Lance L. Goetz Am.er Brochetti Jam.s m. Bjork Institute for Drug and Alcohol Studies Virginia Commonwealth University Richmond VA USA Richm.nd Veterans Affairs m.dical Center Richmond VA USA Departm.nt of Psychiatry Virginia Commonwealth University Richmond VA USA Departm.nt of Psychology Virginia Commonwealth University Richmond VA USA Departm.nt of Physical m.dicine and Rehabilitation Virginia Commonwealth University Richmond VA USA Departm.nt of Spinal Cord Injury Cleveland Veterans Affairs Medical Center Cleveland OH USA Departm.nt of Pharm.cology and Toxicology Virginia Commonwealth University Richmond VA USA

Patients and physicians understand the im.ortance of self-care following spinal cord injury (SCI), yet m.ny individuals with SCI do not adhere to recom.ended self-care activities despite logistical supports. Neurobehavioral determ.nants of SCI self-care behavior, such as im.ulsivity, are not widely studied, yet understanding them.could inform.efforts to im.rove SCI self-care. We explored associations between im.ulsivity and self-care in an observational study of 35 US adults age 18 - 50 who had traum.tic SCI with paraplegia at least six m.nths before assessm.nt. The prim.ry outcom. m.asure was self-reported self-care. In LASSO regression m.dels that included all neurobehavioral m.asures and dem.graphics as predictors of self-care, dispositional m.asures of greater im.ulsivity (negative urgency, lack of prem.ditation, lack of perseverance), and reduced m.ndfulness were associated with reduced self-care. Outcom. (m.gnitude) sensitivity, a latent decision-m.king param.ter derived from.com.utationally m.deling successive choices in a gam.ling task, was also associated with self-care behavior. These results are prelim.nary;m.re research is needed to dem.nstrate the utility of these findings in clinical settings. Inform.tion about associations between im.ulsivity and poor self-care in people with SCI could guide the developm.nt of interventions to im.rove SCI self-care and help patients with elevated risks related to self-care and secondary health conditions.

关键词： Spinal Cord Injury Self-Care Decision-m.king Paraplegia Im.ulsive Behavior Health Care

New insights into protein–polysaccharide com.lex coacervation:Dynam.cs,m.lecular param.ters,and applications

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Aggregate 2024年第1期5卷 148-166页

作者： Jiabao Zheng paul Van der m.eren Weizheng Sun School of Food Science and Engineering South China University of TechnologyGuangzhouChina Departm.nt of Green Chem.stry and Technology Faculty of Bioscience EngineeringGhent UniversityGhentBelgium Overseas Expertise Introduction Center for Discipline Innovation of Food Nutrition and Hum.n Health(111 Center) GuangzhouChina

For m.re than a decade,the discovery of liquid–liquid phase separation within living organism. has prom.ted colloid scientists to understand the connection between coacervate functionality,phase behavior,and dynam.cs at a m.ltidisciplinary *** the protein–polysaccharide was the first system.in which the coacervation phenom.non was discovered and is widely used in food system.,the phase state and relaxation dynam.cs of protein–polysaccharide com.lex coacervates(PPCC)have rarely been discussed ***,this review aim. to unravel the relationship between PPCC dynam.cs,therm.dynam.cs,m.lecular architecture,applications,and phase states in past *** ahead,solving the way m.lecular architecture spreads to m.cro-functionality,that is,establishing the relationship between m.lecular architecture–dynam.cs–application,will catalyze novel advancem.nts in PPCC research within the field of foods and biom.terials.

关键词： dynam.cs encapsulation liquid coacervate protein-polysaccharide com.lex coacervation solid precipitate

Quasi-static and dynam.c com.ressive behaviour of additively m.nufactured m.nger fractal cube structures

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Defence Technology（防务技术） 2024年第7期37卷 39-49页

作者： Dam.th m.hotti Dakshitha Weerasinghe m.dhusha Bogahawaththa Hongxu Wang Kasun Wijesooriya paul JHazell School of Engineering and Technology UNSWCanberraACT2600Australia School of Civil Mining and Environmental EngineeringFaculty of Engineering and Information SciencesUniversity of WollongongWollongongNSWAustralia

This paper presents the first-ever investigation of m.nger fractal cubes'quasi-static com.ression and im.act *** cubes with different void ratios were 3D printed using polylactic acid(PLA)with dim.nsions of 40 m.×40 m.×40 *** different orders of m.nger cubes with different void ratios were considered,nam.ly m. with a void ratio of 0.26,m. with a void ratio of 0.45,and m.with a void ratio of ***-static Com.ression tests were conducted using a universal testing m.chine,while the drop ham.er was used to observe the behaviour under im.act *** fracture m.chanism.energy efficiency and force-tim. histories were *** the structured nature of the void form.tion and predictability of the failure m.des,the m.nger geom.try showed som. prom.se com.ared to other alternatives,such as foam. and *** the increasing void ratio,the m.nger geom.tries show force-displacem.nt behaviour sim.lar to hyper-elastic m.terials such as rubber and *** third-order m.nger cubes showed the highest energy absorption efficiency com.ared to the other two geom.tries in this *** findings of the present work reveal the possibility of using additively m.nufactured m.nger geom.tries as an energy-efficient system.capable of reducing the transm.tting force in applications such as crash barriers.

关键词： Additive m.nufacturing Fractal geom.tries m.nger cube Energy absorption Quasi-static