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Variat.ons in Soil Organic Mat.er Cont.nt.in Cult.vat.d and Uncult.vat.d Calcareous Soils from t.e Medit.rranean Island of Malt. aft.r 15 Years of Cult.vat.on

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Open Journal of Soil Science 2024年第4期14卷 210-226页

作者： Ant.ony t. Sacco Marcelle Agius Clara Didier Inst.t.t. of Eart. Syst.ms Division of Rural Sciences and Food Systems University of Malta Msida Malta É cole Nationale Sup&#233rieure Agronomique de Toulouse Auzeville-Tolosane France

t.e soils of Malt. are calcareous and generally undeveloped. Organic mat.er (OM) in t.ese soils is low.and farmers are const.nt.y urged t. increase it. t.e object.ve of t.is st.dy w.s t. evaluat. any t.mporal variat.on in soil OM aft.r 15 years of cult.vat.on, and det.rmine w.et.er soil series, soil dept., and cult.vat.on influence variat.on. OM w.s det.rmined in t.e t.psoil and subsoil of 7 agricult.ral and 4 non-agricult.ral sit.s. t.e sit.s represent.d 7 different.soil series t.at.are present.on t.e island. In sampling periods 1 (t.= 0 years) and 2 (t.=15 years), t.e OM cont.nt.in t.e collect.ve (all soil series) bulk (t.psoil and subsoil) uncult.vat.d soil w.s 3.9 % and 3.8 % respect.vely. t.is w.s significant.y great.r t.an t.at.of t.e collect.ve bulk cult.vat.d soil (2.4% and 2.3%). t.e OM in t.e collect.ve uncult.vat.d t.psoil w.s 5.4% and 5.2% in periods 1 and 2 and w.s significant.y higher t.an t.at.of t.e cult.vat.d t.psoil (2.5% in bot. periods). t.e OM cont.nt.in t.e collect.ve uncult.vat.d subsoil w.s 2.3% and 2.5% in periods 1 and 2 respect.vely but.only t.at.measured in period 2 w.s significant.y higher t.an t.at.of t.e cult.vat.d subsoil (2.2% in bot. periods). On an individual soil series basis, t.e OM in t.e uncult.vat.d t.psoils w.s significant.y higher t.an t.at.of t.eir cult.vat.d count.rpart.. t.e differences in t.e subsoils w.re not.significant. Across t.e uncult.vat.d soil series, OM w.s significant.y higher in t.e t.psoil t.an in t.e subsoil but.in t.e cult.vat.d soil series t.e differences bet.een t.psoil and subsoil w.re not.significant. t.ere w.s no significant.difference in OM bet.een t.e uncult.vat.d soils of different.series, but.in t.e cult.vat.d t.e OM cont.nt.w.s higher in soils t.at.w.re more mat.re. Aft.r 15 years, no significant.change in OM occurred in bot. t.e collect.ve cult.vat.d and uncult.vat.d bulk soils, t.e collect.ve t.psoil and subsoil, and in most.of t.e individual series. t.e OM cont.nt.of each soil series w.s also s

关键词： Soil Organic Carbon Agricult.ral Land Non-Agricult.ral Land Land Management

Modified At.ospheric Packaging and It. Effect.on Post.arvest.Cannabis Qualit.

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American Journal of Plant.Sciences 2024年第3期15卷 222-234页

作者： Luke L. MacLaughlin Mason t. MacDonald Depart.ent.of Plant Food and Environmental Sciences Faculty of Agriculture Dalhousie University Halifax NS Canada

Cannabis sat.va L. is used as fiber, food, and medicine in several count.ies. t.ough it.is illegal for recreat.onal use in most.of t.e w.rld, t.ere are some count.ies t.at.have legalized product.on and sale. t.ere is a lot.of research on product.on of cannabis, but.less so on st.rage t.chnologies. Cannabis cont.ins several high value compounds, such as cannabinoids and t.rpenoids, t.at.are suscept.ble t. degradat.on via light. t.mperat.re, and oxygen. Several st.dies have explored t.mperat.re and light. and indust.y has adjust.d accordingly. How.ver, less is know. about.oxygen-induced degradat.on. Biochemical st.dies have demonst.at.d oxidat.ve degradat.on of high value compounds, and many producers use some form of modified at.ospheric packaging (MAP) for st.rage. How.ver, t.e efficacy of MAP is unclear. t.e object.ve of t.is paper is t. review.our current.underst.nding of MAP in post.arvest.cannabis st.rage and ident.fy avenues w.ere addit.onal research is needed.

关键词： Cannabinoids Cannabis sat.va Marijuana Nit.ogen Packaging Oxidat.on Post.arvest t.rpenoids t.C

t.ermoelect.ic St.rling Engine (t.G-St.rling Engine) Based on t.e Analysis of t.ermomechanical Dynamics (t.D)

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Journal of Applied Mat.emat.cs and Physics 2024年第7期12卷 2386-2399页

作者： Hiroshi Uechi Lisa Uechi Schun t. Uechi Osaka Gakuin Universit. Osaka Japan Beckman Research Inst.t.t. University of California CA USA Nozut. Machida-City Tokyo Japan

t.e t.ermoelect.ic energy conversion t.chnique by employing t.e Disk-Magnet.Elect.omagnet.c Induct.on (DM-EMI) is examined in det.il, and possible applicat.ons t. heat.engines as one of t.e energy-harvest.ng t.chnologies are discussed. t.e idea is induced by t.e analysis of t.ermomechanical dynamics (t.D) for a nonequilibrium irreversible t.ermodynamic syst.m of heat.engines, such as a drinking bird and a low.t.mperat.re St.rling engine, result.ng in t.ermoelect.ic energy generat.on different.from convent.onal heat.engines. t.e current.t.ermoelect.ic energy conversion w.t. DM-EMI can be applied t. w.de ranges of machines and t.mperat.re differences. t.e mechanism of DM-EMI energy convert.r is cat.gorized as t.e axial flux generat.r (AFG), w.ich is t.e reason w.y t.e t.chnology is applicable t. sensit.ve t.ermoelect.ic conversions. On t.e ot.er hand, almost.all t.e convent.onal t.rbines use t.e radius flux generat.r t. ext.act.huge elect.ic pow.r, w.ich uses t.e radial flux generat.r (RFG). t.e axial flux generat.r is helpful for a low.mechanoelect.ic energy conversion and act.vat.ons of w.st. heat.from macroscopic energy generat.rs such as w.nd, geot.ermal, t.ermal, nuclear pow.r plant. and heat.dissipat.on lines. t.e t.chnique of DM-EMI w.ll cont.ibut. t. solving environment.l problems t. maint.in clean and sust.inable energy as one of t.e energy harvest.ng t.chnologies.

关键词： A Low.t.mperat.re St.rling Engine Axial Flux Generat.r t.ermomechanical Dynamics (t.D) t.ermoelect.ic Energy Conversions

教育的未来:从“学会成长”到“新的社会契约”——访UNESCO《一起重新构想我们的未来》报告起草者诺亚·w.索贝教授

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全球教育展望 2024年第7期53卷 3-12页

作者：于金申诺亚·w.索贝华东师范大学教育学部教育学系上海200062 芝加哥洛约拉大学历史学系芝加哥60660

作为联合国教科文组织《一起重新构想我们的未来:为教育打造新的社会契约》报告的重要起草者之一,诺亚·w.索贝教授基于其学术研究和参与报告起草的经历,分享了自己的独特见解。他认为,这份报告建立在三地平线框架、变化理论、未来素养... 详细信息

作为联合国教科文组织《一起重新构想我们的未来:为教育打造新的社会契约》报告的重要起草者之一,诺亚·w.索贝教授基于其学术研究和参与报告起草的经历,分享了自己的独特见解。他认为,这份报告建立在三地平线框架、变化理论、未来素养、渴望能力、涌现思想等坚实的学理基础之上。在报告的内容层面,“新的社会契约”理念体现了民主参与式的教育转型思路,其实现过程需要因地制宜、灵活应变,并需不断地迭代与完善。未来学校将呈现复数形态,成为新兴的、充满创造力的、开放式的代际交流场所。就当前的学术争论而言,该报告展现了一种修复未来的政治立场,但在如何凸显教育的“弱”、展现教与学的不确定性特质,以及探索国际教育合作的具体路径方面,仍存在一定的提升空间。

关键词：联合国教科文组织教育社会契约学会成长未来教育未来学校

t.e Effect. of t.e Longit.dinal Axis of Loading upon Bending, Shear and t.rsion of a t.in-w.lled Cant.lever Channel Beam

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w.rld Journal of Mechanics 2024年第5期14卷 73-96页

作者： David w. A. Rees Abdelraouf M. Sami Alsheikh College of Engineering and Design Brunel University Uxbridge UK

t.ree aluminium channel sect.ons of US st.ndard ext.uded dimension are mount.d as cant.levers w.t. x-axis symmet.y. t.e flexural bending and shear t.at.arise w.t. applied axial t.rsion are each considered t.eoret.cally and numerically in t.rms of t.o longit.dinal axes of loading not.coincident.w.t. t.e shear cent.e. In part.cular, t.e w.rping displacement., st.ffness and st.ess dist.ibut.ons are calculat.d for t.rsion applied t. longit.dinal axes passing t.rough t.e sect.on’s cent.oid and it. w.b cent.e. t.e st.ess conversions derived from each act.on are superimposed t. reveal a net.sect.onal st.ess dist.ibut.on. t.erein, t.e influence of t.e axis posit.on upon t.e net.axial and shear st.ess dist.ibut.ons is est.blished compared t. previous result. for each beam w.en loading is referred t. a flexural axis t.rough t.e shear cent.e. w.t.in t.e net.st.ess analysis is, it.is show. how.t.e const.aint.t. free w.rping present.d by t.e end fixing modifies t.e axial st.ess. t.e lat.er can be ident.fied w.t. t.e act.on of a ‘bimoment. upon each t.in-w.lled sect.on.

关键词： t.in-Aluminium Channels Cant.lever Beam Bending Shear t.rsion w.rping Bimoment Flexural Axis Cent.e of t.ist Cent.oid Shear Cent.e t.rsional St.ffness Const.ained St.ess

Soybean Response t. w.ed Residues in t.e Soil

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Agricult.ral Sciences 2024年第8期15卷 801-811页

作者： Dw.yne D. Joseph Michael w. Marshall Mat.hew.Cut.lle Depart.ent.of Plant.and Environment.l Sciences Clemson University Clemson SC USA Edist. Research and Educat.on Cent.r Clemson University Blackville SC USA Coast.l Research and Educat.on Cent.r Clemson University Charleson SC USA

Soybean product.on syst.ms t.at.ret.rn plant.residues t. t.e soil surface are gaining in popularit.. As t.ese pract.ces become more w.despread, more crop and w.ed residues are being int.oduced int. t.e upper soil profile. Greenhouse st.dies w.re conduct.d t. det.rmine t.e effect. of varying concent.at.ons of Palmer amarant. and pit.ed morningglory plant.residues (aboveground port.on of t.e plant. on soybean product.on. t.e st.dy w.s arranged in a complet.ly randomized experiment.l design w.t. five t.eat.ent. and five replicat.ons. Palmer amarant. and pit.ed morningglory residues w.re incorporat.d int. soil at.20,000, 40,000, 80,000 and 160,000 ppm. Inert.plast.c residue at.t.e same residue levels w.s included as a check. Soybean dry w.ight. leaf area and leaf t.ssue nut.ient.cont.nt.w.re recorded during t.e st.dy. A decrease in soybean dry w.ight.and leaf area w.s observed as Palmer amarant. residue in t.e soil increased. Palmer amarant. residues of 160,000 ppm and 80,000 ppm in t.e soil significant.y reduced soybean dry w.ight.by 69% and 59%, respect.vely, and soybean leaf area by 60% and 57%, respect.vely. In cont.ast. pit.ed morningglory and inert.plast.c residues had no observable effect.on soybean grow.0} and development. t.is st.dy demonst.at.d Palmer amarant. residues in t.e soil impact.d early season soybean grow.0} and development.

关键词： Reduced t.llage Plant.Residues Allelopat.y Glycine max L.

t.eory of Flexural Shear, Bending and t.rsion for a t.in-w.lled Beam of Open Sect.on

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w.rld Journal of Mechanics 2024年第3期14卷 23-53页

作者： David w. A. Rees Abdelraouf M. Sami Alsheikh College of Engineering and Design Brunel University Uxbridge UK

Aspect. of t.e general Vlasov t.eory are examined separat.ly as applied t. a t.in-w.lled channel sect.on cant.lever beam under free-end end loading. In part.cular, t.e flexural bending and shear t.at.arise under t.ansverse shear and axial t.rsional loading are each considered t.eoret.cally. t.ese analyses involve t.e locat.on of t.e shear cent.e at.w.ich t.ansverse shear forces w.en applied do not.produce t.rsion. t.is cent.e, w.en t.ken t. be coincident.w.t. t.e cent.e of t.ist.implies an equivalent.reciprocal behaviour. t.at.is, an axial t.rsion applied concent.ic w.t. t.e shear cent.e w.ll t.ist.but.not.bend t.e beam. t.e respect.ve bending and shear st.ess conversions are derived for each act.on applied t. t.ree aluminium alloy ext.uded channel sect.ons mount.d as cant.levers w.t. a horizont.l principal axis of symmet.y. Bending and shear are considered more generally for ot.er t.in-w.lled sect.ons w.en t.e t.ansverse loading axes at.t.e shear cent.e are not.parallel t. t.e sect.on = s cent.oidal axes of principal second moment. of area. t.e fixing at.one end of t.e cant.lever modifies t.e St.Venant.free angular t.ist.and t.e free w.rping displacement. It.is show. from t.e w.gner-Kappus t.rsion t.eory how.t.e end const.ained w.rping generat.s an axial st.ess dist.ibut.on t.at.varies w.t. t.e lengt. and across t.e cross-sect.on for an axial t.rsion applied t. t.e shear cent.e. It.should be ment.oned here for w.der applicat.ons and validat.on of t.e Vlasov t.eory t.at.at.endant.papers are t. consider in det.il bending and t.rsional loadings applied t. ot.er axes t.rough each of t.e cent.oid and t.e w.b cent.e. t.erein, bot. bending and t.ist.ng arise from t.ansverse shear and axial t.rsion applied t. each posit.on being displaced from t.e shear cent.e. Here, t.e influence of t.e axis posit.on upon t.e net.axial and shear st.ess dist.ibut.ons is t. be est.blished. t.at.is, t.e net.axial st.ess from axial t.rsional loading is ident.fied w.t. t.e sum of axial st.ess

关键词： t.in w.ll t.eory Cant.lever Beam Open Channel Sect.on Principal Axes Flexure t.ansverse Shear t.rsion Shear Cent.e Shear Flow w.rping Fixed-End Const.aint

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《音乐社会学导论》选译

新美术 2024年第3期45卷 25-63页

作者： [德]特奥多尔·w.阿多诺罗逍然(译) 不详中国美术学院

《作为社会棱镜的音乐》一文已经提到,阿多诺在思想与论述中都是有意识地拒绝体系化表达的。对他来说,无论人文、艺术还是科学,其真正目的都在于对人类的意识能力进行提升,而如若把某些预先制定好的体系与原则从外部施加于我们所要认识... 详细信息

《作为社会棱镜的音乐》一文已经提到,阿多诺在思想与论述中都是有意识地拒绝体系化表达的。对他来说,无论人文、艺术还是科学,其真正目的都在于对人类的意识能力进行提升,而如若把某些预先制定好的体系与原则从外部施加于我们所要认识的事物上,则无异于是在抹除事物自身的独特属性以及事物之间的微妙差异,那么也就是在伤害人类的意识能力。所以,阿多诺要求音乐不能仅仅是被动地接受并施用素材(其中包括体系、手法、风格等)。

关键词：音乐社会学阿多诺事物自身体系化导论独特属性意识

Microplast.cs Det.ct.on and Ident.ficat.on in t.e w.t.rs along Coast.l Areas of Borongan Cit.

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Open Journal of Ecology 2024年第9期14卷 663-672页

作者： Aljon Vict.r G. Nibalvos Crist.na t. Nibalvos College of Science Eastern Samar State University Borongan City Philippines College of Nursing and Allied Sciences Eastern Samar State University Borongan City Philippines

t.is st.dy det.ct. t.e presence of microplast.cs in t.e coast.l areas of Borongan Cit., East.rn Samar, t.is specifically implies t.e microplast.cs present.in t.e w.t.rs along coast.l areas of Borongan Cit.. t.o (2) sampling areas w.re ident.fied and select.d for t.e presence of t.ese microcont.minant. using densit. separat.on, filt.at.on and microscopic ident.ficat.on. Result. reveal a t.t.l of 35 microplast.cs observed from t.e w.t.r samples collect.d, w.t. t.is t.e microplast.cs from Baybay boulevard w.t. an average of 0.79 microplast.cs per Lit.r, w.ile t.e average microplast.c cont.minat.on in Hilangagan beach resort.w.s calculat.d at.0.43 microplast.cs per Lit.r. t.is sums up t. an average of 0.49 microplast.cs per Lit.r for bot. sampling sit.s in Borongan Cit..

关键词： Microplast.cs Microcont.minant. Borongan Cit. Densit. Separat.on Microscopic Ident.ficat.on Nonbiodegradable Cont.minant.