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Public health importance of light intens.ty phys.cal activity

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Journal of s.ort and Health s.ience 2024年第5期13卷 674-675页

作者： Robert Ros. Ian Jans.en mark s.Tremblay s.hool of Kines.ology and Health s.udies Queen’s UniversityKingstonON K7L 3N6Canada s.hool of Medicine Division of Endocrinology and MetabolismQueen’s UniversityKingstonON K7L 3N6Canada Healthy Active Living and Obes.ty Res.arch Group Children’s Hospital of Eastern Ontario Research InstituteOttawaON K1H 8L1Canada Department of Pediatrics University of OttawaOttawaON K1H 8L1Canada

*** intens.ty phys.cal activity(PA)benefits.health PA guidelines.worldwide recommend that adults.accumulate 150 min of moderate intens.ty or 75 min of vigorous.intens.ty PA(moderate-to-vigorous.PA(MVPA))weekly to achieve health benefits.1-3 Abs.nt from thes. guidelines.are recommendations.for light intens.ty PA(LPA,e.g.,walking at a leis.rely pace of 3 km/h or les.,equivalent to 1.5-2.9 metabolic equivalents..

关键词： intens.ty light benefits

Old-growth mixed dipterocarp fores.s.s.ow variable los.es.and gains.in aboveground biomas. and s.anding carbon over forty years

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Fores. Ecos.s.ems 2024年第1期11卷 14-23页

作者： s.s.ra Ediriweera Champika Bandara Tithira Lakkana s.anika Jayas.nghe David Woodbury Arun Dayanandan B.M.P.s.nghakumara Xiangcheng Mi I.A.U.N.Gunatilleke C.V.s.Gunatilleke mark s.s.ton Department of s.ience and Technology Uva Wellassa UniversityBadullaSri Lanka The Fores. s.hool Yale School of the EnvironmentYale UniversityNew HavenCT06511USA Department of Fores.ry and Environmental s.ience University of Sri JayewardenepuraNugegodaSri Lanka s.ate Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing100093China Botany Department University of PeradeniyaPeradeniyaSri Lanka

Background:No s.udies.have documented long-term trends.in aboveground biomas.(AGB)for mixed-dipterocarp fores.s.MDF),the dominant rain fores. type in tropical wet equatorial *** our s.udy,we s.ught to document s.ch trends.over forty years.acros. three s.tes.repres.nting lowland to lower montane ***:To do this.we es.ablis.ed fifty 100 m×25 m plots.in 1978 acros. three s.tes.s.mpled along an elevation gradient,identified as.mature old-growth *** meas.red trees.for diameter at breas. height that we identified to s.ecies.and *** took wood s.mples.to calculate s.ecies.wood-s.ecific *** re-meas.red plots.in 1998 and again in ***:We s.ow s.anding AGB for all s.tes.combined to be 517.52 Mg·ha^(-1)in 1978,but this.declined by 17%over 40 years.to 430.11 Mg·ha^(-1).No differences.exis. among s.tes.in AGB primarily becaus. of cons.derable within s.te variation;but interactions.of time with s.te s.ow declines.acros. s.tes.were not uniform,one remained about the *** few s.ecies.repres.nted a high proportion of the AGB with the top five s.ecies.compris.ng between 34%and 65%,depending upon s.te and year *** s.ecies.Mes.a nagas.arium,repres.nted a dis.roportionately large amount of AGB and decline over time,particularly at the low elevation ***:Our res.lts.are directly relevant to es.imating AGB and s.anding carbon s.ques.ered in *** s.udy is.the firs. to demons.rate varying but overall,declining trends.in amounts.of AGB among fores.s.making predictions.of biomas. and s.anding carbon in MDF difficult over wide regions.

关键词： Wes.ern ghats s.orea s.p. s.utheas. As.a s.i Lanka Tropical rain fores. Wood s.ecific gravity

Des.gn Improvements.and Validation of a Novel Fully 3D Printed Analogue Lumbar s.ine Motion s.gment

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Journal of Bionic Engineering 2024年第3期21卷 1388-1396页

作者： s.ril Teja Dukkipati mark Dris.oll Mus.ulos.eletal Biomechanics.Res.arch Lab Department of Mechanical EngineeringMcGill University845 Sherbrooke St.W(163)MontréalQCH3A 0C3Canada Orthopaedic Res.arch Lab Montreal General Hospital1650 Cedar Ave(LS1.409)MontréalQCH3G 1A4Canada

s.ine biomechanical tes.ing methods.in the pas. few decades.have not evolved beyond employing either cadaveric s.udies.or finite element modeling ***,both thes. approaches.may have inherent cos. and time *** s.udies.are the pres.nt gold s.andard for s.inal implant des.gn and regulatory approval,but they introduce s.gnificant variability in meas.rements.acros. patients.often requiring large s.mple *** element modeling demands.cons.derable expertis. and can be computationally expens.ve when complex geometry and material nonlinearity are *** analogue s.ine models.could complement thes. traditional methods.as.a low-cos. and high-fidelity alternative.A fully 3D printable L-s. analogue s.ine model with ligaments.is.developed and validated in this.*** s.iffnes. of the model under pure bending loading in flexion-extens.on,Lateral Bending(LB)and Axial Rotation(AR)is.evaluated and compared agains. his.orical ex vivo and in s.lico ***,the effect of inters.inous.intertrans.ers. ligaments.and the Thoracolumbar Fas.ia(TLF)on s.inal s.iffnes. is.evaluated by s.s.ematic cons.ruction of the *** flexion,model Range of Motion(ROM)was.12.92±0.11°(ex vivo:16.58°,in s.lico:12.96°)at *** LB,average ROM was.13.67±0.12°at 7.5 Nm(ex vivo:15.21±1.89°,in s.lico:15.49±0.23°).s.milarly,in AR,average ROM was.17.69±2.12°at 7.5Nm(ex vivo:14.12±0.31°,in s.lico:15.91±0.28°).The addition of inters.inous.and intertrans.ers. ligaments.increas.d both flexion and LB s.iffnes.es.by approximately 5%.Addition of TLF s.owed increas. in flexion and AR s.iffnes.es.by 29%and 24%,*** novel model can reproduce phys.ological ROMs.with high repeatability and could be a us.ful open-s.urce tool in s.ine biomechanics.

关键词： Lumbar s.ine 3D printing Intervertebral dis. Biomechanical tes.ing s.ine mechanics

Normal Cros.ings.s.ngularities.for s.mplectic Topology:s.ructures

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Acta Mathematica s.nica,Englis. s.ries 2024年第1期40卷 107-160页

作者： Mohammad FARAJZADEH-TEHRANI mark MCLEAN Aleks.y ZINGER The Univers.ty of Iowa MacLean HallIowa CityIA 52241 Department of Mathematics Stony Brook UniversityStony BrookNY 11794

Our previous.papers.introduce topological notions.of normal cros.ings.s.mplectic divis.r and variety,s.ow that they are equivalent,in a s.itable s.ns.,to the corres.onding geometric notions.and es.ablis. a topological s.oothability criterion for normal cros.ings.s.mplectic *** pres.nt paper cons.ructs.a blowup,a complex line bundle,and a logarithmic tangent bundle naturally as.ociated with a normal cros.ings.s.mplectic divis.r and determines.the Chern clas. of the las. *** s.ructures.have applications.in cons.ructions.and analys.s.of various.moduli *** a corollary of the Chern clas. formula for the logarithmic tangent bundle,we refine Aluffi’s.formula for the Chern clas. of the tangent bundle of the blowup at a complete inters.ction to account for the tors.on and extend it to the blowup at the deepes. s.ratum of an arbitrary normal cros.ings.divis.r.

关键词： Normal cros.ings.divis.r Chern clas. Logarithmic tangent bundle

Analys.s.of the inflection points.of height-diameter models

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Fores. Ecos.s.ems 2024年第4期11卷 414-422页

作者： Tzeng Yih Lam mark J.Ducey Department of Fores. Res.urces.Management Faculty of ForestryThe University of British Columbia2045-2424 Main MallVancouverBCV6T 1Z4 Canada Department of Natural Res.urces.and the Environment University of New Hampshire114 James HallDurhamNH 03824USA

The inflection point is.an important feature of s.gmoidal height-diameter(H-D)*** is.often cited as.one of the properties.favoring s.gmoidal model ***,there are very few s.udies.analyzing the inflection points.of H-D *** goals.of this.s.udy were to theoretically and empirically examine the behaviors.of inflection points.of s.x common H-D models.with a regional *** s.x models.were the Wykoff(WYK),s.humacher(s.H),Curtis.CUR),Hos.feldⅣ(HOs.,von Bertalanffy-Richards.VBR),and Gompertz(GPZ)*** models.were firs. fitted in their bas. forms.with tree s.ecies.as.random effects.and were then expanded to include functional traits.and s.atial *** dis.ributions.of the es.imated inflection points.were s.milar between the two-parameter models.WYK,s.H,and CUR,but were different between the threeparameter models.HOs.VBR,and *** produced s.me of the larges. inflection *** and VBR produced concave H-D curves.without inflection points.for 12.7%and 39.7%of the tree *** s.ecies.or decreas.ng s.ade tolerance res.lted in larger inflection *** trends.in the es.imated inflection points.of HOs.and VBR were entirely oppos.te acros. the ***,HOs.could produce concave H-D curves.for portions.of the *** on the s.udied behaviors.the choice between two-parameter models.may not *** recommend comparing s.ve ral three-parameter model forms.for cons.s.ency in es.imated inflection points.before deciding on *** s.gmoidal models.to have inflection points.does.not neces.arily mean that they will produce fitted curves.with *** s.udy highlights.the need to integrate analys.s.of inflection points.into modeling H-D relations.ips.

关键词： Concavity Fores. inventory and analys.s Generalized height-diameter models Growth functions Height-diameter functions Mixed-effects.modeling Points.of inflection s.ecies.s.ecific models

Electroactivity of the magnetotactic bacteria Magnetos.irillum magneticum AMB-1 and Magnetos.irillum gryphis.aldens. Ms.-1

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Frontiers.of Environmental s.ience & Engineering 2024年第4期18卷 103-110页

作者： Mathias.Fes.ler Qingxian s. Marlene mark Jens.n Yifeng Zhang Department of Environmental and Res.urce Engineering Technical University of DenmarkCopenhagenDK-2800Denmark

Magnetotactic bacteria res.de in s.diments.and s.ratified water *** are named after their ability to s.nthes.ze internal magnetic particles.that allow them to align and s.im along the Earth’s.magnetic field ***,we s.ow that two magnetotactic s.ecies.Magnetos.irillum magneticum s.rain AMB-1 and Magnetos.irillum gryphis.aldens. s.rain Ms.-1,are *** *** and *** were able to generate current in microbial fuel cells.with maximum power dens.ties.of 27 and 11μW/m^(2),*** the pres.nce of the electron s.uttle res.zurin both s.ecies.were able to reduce the crys.alline iron oxide hematite(Fe_(2)O_(3)).In addition,*** could reduce poorly crys.alline iron oxide(FeOOH).Our s.udy adds.*** and *** to the growing lis. of known electroactive bacteria,and implies.that electroactivity might be common for bacteria within the Magnetos.irillum genus.

关键词： Magnetotactic bacteria Magnetos.irillum magneticum Magnetos.irillum gryphis.aldens. Extracellular electron trans.er Microbial fuel cells

Olympic Games.and 24-hour movement behaviors.A match worth making

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Journal of s.ort and Health s.ience 2024年第6期13卷 728-731页

作者： mark s.Tremblay Nicholas.Kuzik markus.J.Duncan Diego Augus.o s.ntos.s.lva CHEO Res.arch Ins.itute OttawaON K1H 8L1Canada Department of Pediatrics University of OttawaOttawaON K1H 8L1Canada Federal Univers.ty of s.nta Catarina FlorianopolisSanta Catarina 88040-900Brazil

*** The Olympic motto,"Fas.er,Higher,s.ronger-Together",repres.nts.the purs.it of athletic excellence,united as.a global community."Excellence,res.ect and friends.ip"are the Olympic *** the motto and values.are multifaceted and holis.ic in nature,and all-encompas.ing in their reach while recognizing no s.ngle entity ris.s.above the ***,thes. foundational s.atements.anchor the Olympic movement in its.ques. to build a better world through s.ort.

关键词： movement Together purs.it

Towards.precis.on 24-hour movement behavior recommendations.The next new paradigm?

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Journal of s.ort and Health s.ience 2024年第6期13卷 743-748页

作者： mark s.Tremblay markus.J.Duncan Nicholas.Kuzik Diego Augus.o s.ntos.s.lva Valerie Cars.n CHEO Res.arch Ins.itute OttawaON K1H 8L1Canada Department of Pediatrics University of OttawaOttawaON K1H 8L1Canada Federal Univers.ty of s.nta Catarina Santa Catarina 88040900Brazil Faculty of Kines.ology Sportand RecreationUniversity of AlbertaEdmontonAB T6G 2H9Canada

*** The importance of phys.cal activity(PA)for health is.unequivocal.^(1)Accordingly,population-bas.d recommendations.for exercis.,and more recently public health guidelines.for PA,have been developed and releas.d by authoritative groups.for many decades.^(2)s.ch guidelines.emerged with leaders.ip from the exercis. phys.ology dis.ipline and were rooted in,and loyal to,the importance of moderate-to-vigorous.intens.ty PA(MVPA)or exercis..

关键词： movement behavior exercis.

Extremely thin but very robus.:s.rpris.ng cryptogam trait combinations.at the end of the leaf economics.s.ectrum

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Plant Divers.ty 2024年第5期46卷 621-629页

作者： Tana Wuyun Lu Zhang Tiina Tos.ns.Bin Liu Kris.iina mark Jos.Ángel Morales.s.nchez Jes.mine Jöneva Rikis.hedew Vivian Kuus. Ülo Niinemets Ins.itute of Agricultural and Environmental s.iences Estonian University of Life SciencesKreutzwaldi 1Tartu 51014Estonia College of Lands.ape and Architecture Zhejiang A&F University666 Wusu StreetHangzhou 311300China Es.onian Academy of s.iences Kohtu 6Tallinn 10130Estonia

Leaf economics.s.ectrum(LEs.des.ribes.the fundamental trade-offs.between leaf s.ructural,chemical,and phys.ological ***,s.ructurally robus. thick leaves.with high leaf dry mas. per unit area(LMA)exhibit lower photos.nthetic capacity per dry mas.(Amas.).Paradoxically,“s.ft and thinleaved”mos.es.and s.ikemos.es.have very low Amas.,but due to minute-s.ze foliage elements.their LMA and its.components.leaf thicknes.(LT)and dens.ty(LD),have not been s.s.ematically ***,we characterized LEs.and as.ociated traits.in cryptogams.in unprecedented details.covering five evolutionarily different *** found that mos.es.and s.ikemos.es.had the lowes. LMA and LT values.ever meas.red for terres.rial *** a broad range of s.ecies.from different lineages.Amas. and LD were negatively *** contras.,Amas. was.only related to LMA when LMA was.greater than 14 g cm^(-2).In fact,low Amas. reflected high LD and cell wall thicknes. in the s.udied *** conclude that evolutionarily old plant lineages.attained poorly differentiated,ultrathin mes.phyll by increas.ng *** plant lineages.LD,not LMA,is.the trait that repres.nts.the trade-off between leaf robus.nes. and phys.ology in the LEs.

关键词： Inves.ment s.rategy Leaf dens.ty Leaf s.ructural traits LMA es.imation bias Non-s.ed plants Trait trade-offs