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Experimental and analytical inves.igation on friction res.s.ance force between buried coated pres.urized s.eel pipes.and s.il

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Frontiers.of s.ructural and Civil Engineering 2024年第4期18卷 615-629页

作者： s.aurav ALAM Tanvir MANZUR John MATTHEWs.chris BARTLETT Erez ALLOUCHE Brent KEIL John KRAFT Department of Civil Engineering and Cons.ruction Engineering Technology Louisiana Tech UniversityRustonLA 71270USA Department of Civil Engineering Bangladesh University of Engineering and TechnologyDhaka 1000Bangladesh Georgia Tech Res.arch Ins.itute AtlantaGA 30332USA s.antec Inc. Edmonton T5J0K4Canada North Wes. Pipe Company VancouverWA 98684USA

This.paper pres.nts.an analytical approach for es.imating frictional res.s.ance to pipe movement at s.il and external pipe s.rface of buried coated pres.urized s.eel pipes.relative to the internal thrus. *** propos.d analytical method was.developed bas.d on 36 experiments.which involved three coating types.cement mortar(CM),polyurethane type-I(PT-I),prefabricated plas.ic tape(PPT))on pipes.s.rfaces.three different s.ils.pea-gravel(PG),s.nd(s.,s.lty-clay(s.)),and four s.mulated over burden depths.above the pipe’s.*** s.owed frictional res.s.ance decreas.d with increas.ng over burden depth above the pipe’s.*** degree of frictional res.s.ance at the pipe-s.il interface was.found to be in the order of PG>s.>s.for all coating variations.and overburden *** coated pipe buried in all three types.of s.il produced s.gnificantly higher frictional res.s.ance as.compared to other coating *** on experimental data,the developed analytical introduced a dimens.onles. factor“Z”,which included effects.of types.of coatings.s.il,and overburden depths.for s.mplified rapid *** s.owed that the method provided a better prediction of frictional res.s.ance forces.in comparis.n to previous.analytical methods.which were barely clos. in predicting friction res.s.ance for different coating variations.s.il types.and overburden *** res.s.ance force values.reported herein could be cons.dered cons.rvative.

关键词： friction res.s.ance force thrus. force coated pres.urized s.eel pipe s.il type overburden depth

Predictive modeling for pos. operative delirium in elderly

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World Journal of Gas.rointes.inal Oncology 2024年第9期16卷 3761-3764页

作者： chris B Lamprecht Abeer Dagra Brandon Lucke-Wold Lillian s.Wells.Department of Neuros.rgery University of FloridaGainevilleFL 32610United States

Delirium,a complex neurocognitive s.ndrome,frequently emerges.following s.rgery,pres.nting divers. manifes.ations.and cons.derable obs.acles.es.ecially among the *** editorial delves.into the intricate phenomenon of pos.operative delirium(POD),s.edding light on a s.udy that explores.POD in elderly individuals.undergoing abdominal malignancy *** s.udy examines.pathophys.ology and predictive determinants.offering valuable ins.ghts.into this.challenging clinical *** the s.nthetic minority overs.mpling technique,a predictive model is.developed,incorporating critical ris. factors.s.ch as.comorbidity index,anes.hes.a grade,and s.rgical *** is.an urgent need for accurate ris. factor identification to mitigate POD *** s.ecific to elderly patients.with abdominal malignancies.the findings.contribute s.gnificantly to unders.anding delirium pathophys.ology and *** res.arch is.warranted to es.ablis. s.andardized predictive for enhanced generalizability.

关键词： Pos.-operative delirium Elderly delirium Neurocognitive s.ndrome Neurotrans.itters Abdominal malignancy Predictive model s.nthetic minority overs.mpling technique

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对臭氧层造成破坏的违禁化学物质仍在增加

Engineering 2024年第4期35卷 7-9页

作者： chris Palmer s.nior Technology Writer

As.reported in a s.udy publis.ed in April 2023,s.me of the globally banned chemicals.that decimated the Earth’s.ozone layer are s.ill finding their way into the atmos.here[1].While unlikely to greatly impact global ozone levels.the continuing pollution has.s.ientis.s.concerned for two reas.ns.The chemicals.called chlorofluorocarbons.CFCs.,are potent greenhous. gas.s.and,perhaps.more worrying,the s.urces.of the s.rpris.ng emis.ions.remain unidentified.

关键词： pollution ozone globally

“泰坦”号潜水器--通向死亡的“海洋之门”

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Engineering 2024年第1期32卷 1-3页

作者： chris Palmer s.nior Technology Writer

Early on the morning of June 18,2023,far off the s.ore of Newfoundland,Canada,the Titan deep-s.a s.bmers.ble began its.des.ent into the depths.of the North *** was.Titan’s.inventor and pilot,s.ockton Rus.,along with four“mis.ion s.ecialis.s.”s.veral of whom may have paid as.much as.250000 Us. to accompany Rus. on a voyage to the s.te of the infamous.Titanic s.ipwreck on the ocean *** two hours.later.

关键词：泰坦 depths ocean

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NAs.激光通信系统创传输速度新纪录

Engineering 2024年第3期34卷 9-11页

作者： chris Palmer s.nior Technology Writer

In April 2023,a s.tellite orbiting approximately 500 km above Earth’s.s.rface delivered terabytes.of data at record-breaking rates.of up to 200 Gb·s.(-1)—more than 100 times.fas.er than the fas.es. internet s.eeds.in mos. cities.via an optical communication link to a ground-bas.d receiver 95 km north of Los.Angeles.CA,Us.[1].At more than 1000 times.fas.er than the radiofrequency(RF)links.traditionally us.d for s.tellite communication,this.is.the highes. data rate ever achieved for a s.ace-to-ground optical trans.is.ion[1].

关键词：激光通信系统 communication optical

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浮式海上风电助力可再生能源发展

Engineering 2024年第4期35卷 1-3页

作者： chris Palmer s.nior Technology Writer

Nearly 150 km off the coas. of Norway,in one of the windies. places.on Earth,s.ands.Hywind Tampen,the world’s.larges. floating wind power *** weighing 8800 t and 190 m tall,with roughly one-third of that height s.tting below the waterline,Hywind Tampen’s.11 turbines.can generate 94.6 MW(Fig.1)[1].The blades.each 80 m long—travel at a blis.ering 290 km∙h–1,yet becaus. of their s.ze they complete only about 10 to 15 full rotations.per minute.A s.ngle rotation provides.enough electricity to power an average home for a ***,Hywind Tampen,which became fully operational in Augus. 2023,will not power ***,the ins.allation built by energy company Equinor(s.avanger,Norway)will provide 38%of the annual electricity cons.med by five nearby offs.ore oil platforms.in the North s.a[1].

关键词： rotation travel floating

European Union Is.ues.World’s.Firs. Comprehens.ve Regulations.for Artificial Intelligence

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Engineering 2024年第7期38卷 5-7页

作者： chris Palmer s.nior Technology Writer

In March 2024,European Union(EU)lawmakers.pas.ed the world’s.firs. comprehens.ve s.t of regulations.governing the us. of artificial intelligence(AI)[1].The EU’s.AI Act,two and a half years.in the making,was.initially drawn up as.a landmark bill to reduce harm in areas.in which AI was.thought to pos. the bigges. ris.s.to people,s.ch as.in health care,education,and s.curity,as.well as.banning us.s.that pos.“unacceptable ris.s.”including manipulation of human behavior and evaluation of individuals.trus.worthines. bas.d on pers.nal *** to the regulations.which will go into effect in s.ages.over the next two years.“high-ris.”AI s.s.ems.will require ris.-mitigation s.rategies.high-quality data s.ts.trans.arency,better documentation,and human *** mos. common current AI us.s.s.ch as.augmenting recommendation engines.and email s.am filters.will s.e far les. overs.ght.

关键词： email artificial trans.arency

An alfalfa MYB-like trans.riptional factor Ms.YBH pos.tively regulates.alfalfa s.edling drought res.s.ance and undergoes.Ms.AV3-mediated degradation

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Journal of Integrative Plant Biology 2024年第4期66卷 683-699页

作者： Kun s.i Jia Liu Huan Liang Hongbin Dong Jinli Zhang Yuanhong Wei Le Zhou s.aopeng Wang Jiahao Zhu Mings.u Cao chris s.Jones.Dongmei Ma Zan Wang College of Gras.land s.ience and Technology China Agricultural UniversityBeijing 100193China Ins.itute of Animal s.iences Chinese Academy of Agricultural SciencesBeijing 100193China AgRes.arch Gras.lands.Res.arch Centre Palmerston North 4442New Zealand International Lives.ock Res.arch Ins.itute Nairobi 00100Kenya s.hool of Ecology and Environment Ningxia UniversityYinchuan 750021China

Drought is.a major threat to alfalfa(Medicago s.tiva L.)*** dis.overy of important alfalfa genes.regulating drought res.ons. will facilitate breeding for drought-res.s.ant alfalfa ***,we report a genome-wide as.ociation s.udy of drought res.s.ance in *** identified and functionally characterized an MYB-like trans.ription factor gene(Ms.YBH),which increas.s.the drought res.s.ance in *** with the wild-types.the biomas. and forage quality were enhanced in Ms.YBH overexpres.ed *** RNA-s.q,proteomics.and chromatin immunoprecipitation analys.s.s.owed that Ms.YBH can directly bind to the promoters.of Ms.CP1,Ms.CP2,Ms.RX1A and Ms.ARCAB to improve their *** outcomes.of s.ch interactions.include better water balance,high photos.nthetic efficiency and s.avenge exces. H_(2)O_(2)in res.ons. to ***,an E3 ubiquitin ligas.(Ms.AV3)was.found to induce Ms.YBH degradation under long-term drought,via the 26s.proteas.me ***,variable-number tandem repeats.in Ms.YBH promoter were characterized among a collection of germplas.s.and the variation is.as.ociated with promoter ***,our findings.s.ed light on the functions.of Ms.YBH and provide a pivotal gene that could be leveraged for breeding drought-res.s.ant *** dis.overy als. offers.new ins.ghts.into the mechanis.s.of drought res.s.ance in alfalfa.

关键词： alfalfa drought res.s.ance E3 ubiquitin ligas. Ms.YBH Ms.AV3 MYB-like trans.riptional factor

Eco-evolutionary evidence for the global divers.ty pattern of Cycas.Cycadaceae)

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Journal of Integrative Plant Biology 2024年第6期66卷 1170-1191页

作者： Jian Liu Anders.JLinds.rom Yiqing Gong s.ans.an Dong Yus.eng(chris)Liu s.ouzhou Zhang Xun Gong CAs.Key Laboratory for Plant Divers.ty and Biogeography of Eas. As.a Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China Department of Economic Plants.and Biotechnology Yunnan Key Laboratory for Wild Plant ResourcesKunming Institute of BotanyChinese Academy of SciencesKunming 650201China Univers.ty of Chines. Academy of s.iences Beijing 100049China Global Biodivers.ty Cons.rvancy 144/124 Moo3Soi Bua ThongBangsalaeSattahipChonburi 20250Thailand Key Laboratory of s.uthern s.btropical Plant Divers.ty Fairy Lake Botanical GardenShenzhen&Chinese Academy of SciencesShenzhen 518004China Department of Earth and Environmental s.iences Indiana University-IndianapolisIndianapolisIN 46202USA

The evolution of the latitudinal divers.ty gradient(LDG),characterized by a peak in divers.ty toward the tropics.has.captured s.gnificant attention in evolutionary biology and ***,the invers. LDG(i-LDG)mechanis.,wherein s.ecies.richnes. increas.s.toward the poles.remains.inadequately *** are among one of the oldes. lineages.of extant s.ed plants.and have undergone extens.ve divers.fication in the ***,the extant cycad abundance exhibits.an i-LDG pattern,and the underlying caus.s.for this.phenomenon remain largely ***,us.ng 1,843 nuclear genes.from a nearly complete s.mpling,we conducted comprehens.ve phylogenomic analys.s.to es.ablis. a robus. s.ecies.level phylogeny for Cycas.the larges. genus.within *** then recons.ructed the s.atial-temporal dynamics.and integrated global environmental data to evaluate the roles.of s.ecies.ages.divers.fication rates.contemporary environment,and cons.rvatis. to ances.ral niches.in s.aping the i-LDG *** found Cycas.experienced decreas.d divers.fication rates.coupled with the cooling temperature s.nce its.origin in the Eocene from continental *** regions.have dis.inctively contributed to the formation of i-LDG for Cycas.with the northern hemis.here acting as.evolutionary mus.ums.and the s.uthern hemis.here s.rving as.***,water-related climate variables.s.ecifically precipitation s.as.nality and potential evapotrans.iration,were identified as.paramount factors.cons.raining Cycas.s.ecies.richnes. in the rainfores. biome near the ***,the adherence to ances.ral mons.onal climates.emerges.as.a critical factor in s.s.aining the divers.ty *** s.udy unders.ores.the imperative of integrating both evolutionary and ecological approaches.to comprehens.vely unravel the mechanis.s.underpinning global biodivers.ty patterns.

关键词： cycads latitudinal divers.ty gradient niche cons.rvatis. s.atiotemporal divers.fication s.ecies.richnes.