简介：Weinvestigatetheinteractionbetweenapositivemassandanegativeeffectivemassthroughathreemasschainconnectedwithelasticsprings,apairofmassesisdesignedtohaveaneffectivenegativemass,anditinteractswiththethirdpositiveoneasifanequivalenttwo-masschain.Thedynamicsoftheequivalenttwo-masschainshowsthatthetwobodiesmaybeself-acceleratedinsamedirectionwhentheeffectivemassbecomesnegative,theexperimentisalsoconductedtodemonstratethistypeofmotion.Wefurthershowthattheenergyprinciple(Hamilton’sprinciple)isapplicableiftheenergyofthenegativemassunitisproperlycharacterized.Theresultmayberelevanttocompositewithcellsofeffectivenegativemass,theirinteractionwithmatrixmayleadtomorericherunexpectedmacroscopicresponses.

简介：Purpose:Theaimofthisstudywastoanalyzeandcomparetheeffectsofdifferentsports(swimming,football,basketball,andhandball)onfatmassandleanmassinprepubertalandpubertalgirls.Methods:Twohundredgirls(10.6±1.5yearsold,TannerstagesI–III)participatedinthestudyandweredividedinto5groups:40swimmers,40footballplayers,40basketballplayers,40handballplayers,and40controls.Fatandleanmassesatwholebody,arms,trunk,andlegsweremeasuredusingdual-energyX-rayabsorptiometry(DXA).PubertalstatuswasdeterminedusingTannertest.Effectsofdifferentsportsonfatandleanmasseswereassessedthroughanalysisofcovariancewithheightascovariates.Analyseswereperformedseparatelyin2groupsdependingontheTannerstage(prepubertalandpubertal).Results:Thegirlsofthecontrolgrouphadlessleanmassandmorefatmasscomparedtothegirlswhoplaysports(p<0.05).Thereweredifferencesinbodyfatbetweensports.Theswimmersandfootballplayershadlessbodyfat(p<0.05).Ontheotherhand,handballplayersshowedthehighestvaluesinleanmass(p<0.05).Conclusion:Impactsports(football,basketball,andhandball)andlow-impactsports(swimming)provideanappropriatedevelopmentofleanmassingrowinggirls.Wecanconcludethatpeoplepracticingsportsatearlyagesensurealowerfatmassandhigherleanmasscomparedtothosewhodonotpractice.Theseresultsmaybeusefulasapreventivemethodofadultobesity.

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简介：Splenosisistheautotransplantationofsplenictissuethatusuallyfollowstraumaticruptureofthespleen.Splenicimplantsmaybeseededwithinorbeyondtheperitonealcavity.1Themostfrequentlocationsofsplenosisinthedescendingorderaretheserosalsurfaceofthesmallintestine,thegreateromentum,parietalperitoneum,surfaceofthelargeintestine,mesentery,undersurfaceofthediaphragmandthethorax.1,2However,intrahepaticsplenosisisveryrare.Werecentlyencounteredapatientinwhomresultsofultrasonography(US)andcomputedtomography(CT)revealedanintrahepaticmassthatconsistedofectopicsplenictissue.Toourknowledge,thisisthefifthreportofectopicsplenictissueintheliverintheEnglish-languageliterature.Wepresenttheimagingfindingsofthesplenicimplantsintheliveranddiscussthediagnosisanditspracticalsignificance.

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简介：本文阐释了大众消费主义在美国的兴起以及向全球,特别是中国传播的历史。论文第一部分考察了20世纪初期美国大众消费主义的特征以及随着消费主义开始重塑美国人的生活而引发的争论,认为美国消费主义的兴起实际上与美国人对丰裕社会中生产过剩问题的担心有关,同时也是不断扩大市场的需要。第二部分考察了美国大众消费品向海外的出口、美国形象的输出以及随之而来的关于美国化的争论。在第三部分,作者认为,美国的消费主义模式在输出过程中逐渐适应当地的社会与文化,到20世纪70和80年代,世界各地的消费主义实际上越来越多样化,人们不再像过去那样把消费主义的扩张等同于美国化,相反,消费主义被认为是一种支持,而不是消弱了国家和个人身份多样性的现象。实际上,正是这种多元地方消费主义的扩张在一定程度上促进了冷战的结束。作者在结论中指出,关于大众消费主义的争论在世界各地仍然在继续,但争论的焦点不再是对"美国化"或"文化帝国主义"的恐惧,而更关注环境的可持续性和财富的分配等问题。尽管大众消费主义可以在全球范围内通过适应不同地区的文化而产生强大的吸引力,但它所反映的仍然是20世纪初期美国人的观念,而这一观念越来越落后于时代,那就是:在一个资源丰裕的世界里,需要不断地刺激人们的欲望和需求。

简介：ThepresentpaperconcernsitselfwithageneralreviewandanalysisofBritishmassMedia.ThefirstpartstartswithanintroductiontothehistoryanddevelopmentofBritishmassmedia.ThesecondpartwillfocusontheanalysisofthetwomajorbranchesintherealmofBritishMassmedia-theBroadcastMediaandthePrintMedia.Thirdly,theBritishmedia’scoverageofBeijingOlympicsispresentedtohaveabetterknowledgeofthewellacceptedclassificationofUKmassmedia,especiallynewspapersandtelevisionaswellasitsinfluence.

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简介：岩石块的排水量和岩石结构的性质在隧道的稳定性起一个重要作用。基于关键块模型，受到集中的短时间的有压缩性的波浪的地下的隧道的动态不稳定性分析被进行。分裂和惯性的效果引起的隧道的不稳定性被区分。并且隧道的房顶轮廓弯曲的影响也被决定。

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简介：Basedonthetraditionalwayofabalonebreeding,thetechnologicalprocessofindustrialabalonebreedingsuitableforthecoastalareasofsouthernChinahasbeendeveloped.Theprocessissimpleandeasytohandle,andresultsinahighyieldofyoungabalonesafterbeingapplied.

简介：Objective:Toevaluatetheassociationbetweenobesityandtheriskofcolorectalcancer.Methods:331patientswithrectalcancerand175withcoloncancerwhoacceptedsurgicaloperationatBeijingCancerHospitalduring1995and2002wereenrolled.Datawerecollectedbyreviewingthepathologymaterialsandhospitalrecords.258healthypeoplewhoacceptedhealthexaminationatBeijingCancerHospitalduring2000and2002werealsoenrolledascontrol.Dataofheight,weightandgenderatthetimeofexaminationwerealsocollected.Obesitywasestimatedbybodymassindex(BMI),computedasweightinkilogramsdividedbyheightinmeterssquared(kg/m2).ThedegreeofobesitywascomparedbetweenthetwogroupsusingBMI(18.5,24-27.9and(28(kg/m2)asthecut-offpointsforunderweight,overweightandobesity.Associationswithobesitywereestimatedbyoddsratios(ORs)and95%confidenceintervals(CIs).AllORswereadjustedforageandsex.Results:Obesitywassignificantlyprevalentinfemalepatientswithrectalcancer.AllthepatientswithcoloncancershowedlowerlevelofBMIthancontrolsubjects.TheORsforrectalcancerrosewithincreasingBMIinwomen.Meanwhile,theORsforcoloncancerdroppedwithincreasingBMIinbothmenandwomen.Obesitywasanindependentriskfactorforrectalcancer,butnotanindependentriskfactorforcoloncancer.Conclusion:Rectalcancerandcoloncancermayhavedifferentbiologicalbehavior.Obesewomenhaverelativelyhighriskforrectalcancer.

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简介：在无损失的压缩的地里，当他们面对集体数据时，传统的软件的大多数类型有一些缺乏。他们的压缩能力被数据窗口尺寸和压缩格式设计限制。这份报纸论述格式说出支持数据窗户尺寸直到4GB并且在集体数据压缩有一些优点的CZ格式的压缩的一个新图案。用这种格式，一个压缩共享软件说出ComZip被设计。实验结果支持那ComZip在大多数情况中比WinZip，Bzip2和WinRAR有更好的压缩比率，特别当集体数据的GB或TB被压缩时。并且ComZip有潜力当数据窗户尺寸超过128MB，在未来打败7压缩。

简介：ＣｏｍｐａｒｉｓｉｏｎｏｆＦＡＢａｎｄＭＡＬＤＩＭａｓｓＳｐｅｃｔｒｏｍｅｔｒｙｏｆＧｉｎｓｅｎｏｓｉｄｅｓ￥ＺｈｏｕＹｕ；ＬｉｕＺｈｉｑｉａｎｇ；ＳｏｎｇＦｅｎｇｒｕｉ；ＬｉｕＳｈｕｙｉｎｇ；ＬｉＸｉａｎｇｇａｏ；ＹｉｎＪｉａｎｇｙｕａｎ（１Ｃｈａ...

简介：Thereisanincreasingnumberof'massevents'inmainlandChina.MystudyextendsthecurrentstudiestothecontextofChinaandtriestoexaminethepotentialimpactsofclimatechangesonhumanconfliasinChina.Theresultssuggestastronglinkagebetweenthedeviationofmonthlymeantemperaturefromthehistoricalmeanandthenumberofmasseventsinaprovince.Ifthecurrenttrendofwarmingpersists,inthenext6-8decades,thenumberofmasseventsinChinawillincreasebyover8.8%.

简介：Thenegativeionfastatombombardment(NIFAB)massspectraofmono-,di-saccharidesandglycosidesusingphenylboronicacid(PBA)asreagenthavebeenstudied.Intheionsource,PBAreactsstereospecificallywiththemoleculescontainingcis-vicinalglycolstoformcharacteristicions,fromwhichthestereo-isomersofsaccharidescanbedefinitelydistinguished.Disaccharidesandglyco-sideswithβ-glycosidiclinkageseemtobeunfavorabaletoreactwithPBA,therefore,bycomparisonoftheabundancesofthecharacteristicions,theconfigurationoftheglycosidiclinkageinthesecompoundsmaybeinferred.

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