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1、启德学府：雅思阅读强化训练（2）雅思阅读文章主要来自于学术出版物例如NewScientist,Economist,AmericanScientist,ScientificAmerica,nationalGeographic等，而NewScientist被用到的频率最高，所以我会从这本杂志中摘一些最新的文章做个精读系列给烤鸭们使用。要想真正提高雅思阅读能力，尤其是对想拿高分的烤鸭们，大量阅读和积累是丌可避免的哦，希望这个精读系列能对你们有帮助！雅思阅读文章来源NewScientist杂志2013.4.9最新文章《Lostinthecloud》精读(上接p
2、art1)Inanycase,yourcloudpossessionsrarelyexistinjustonelocation.Forexample,ifyouuploadsomethingtothedigitallockerDropbox,whichusesAmazon'sservers,itistransferredviayourinternetserviceprovider(ISP)throughmultipleway-stationscalledrouterstooneofAmazon'sdatacentres,mostofwhicharein
3、NorthAmerica.Oncethere,yourfilewillbeduplicatedacrossmultipleservers–perhapsevensplitintopieces–tobalancetheloadandkeeppeople'sdataflowing.Thereisnowayforyoutoknowwhereitwillendup.What'smore,ifyourfilehasalreadybeenuploadedbysomeoneelse–adigitalcopyofaRadioheadalbum,forinstance–
4、thenDropboxwilljustlinkyoutotheexistingfilesratherthanwastebandwidthandspacebyuploadingaduplicate.Arethosefilesuploadedbythatotherpersonnowyours?Surelynot.Untanglingrelationshipswithyourpossessionsinthecloudquicklygetsconfusing."It'samuddleofabstractions,"saysRichardHarperatMicr
5、osoftResearchinCambridge,UK.Thisiscausingtensionbetweenourintuitivebeliefsaboutpropertyandtherealitythatthistechnologyhascreated.Howcanweresolvethis?Somehaveproposedrestructuringthebasicarchitectureofthecloudtohelpbringitclosertotraditionalnotionsofproperty.BradTempleton,whochai
6、redtheEFF'sboardofdirectorsuntil2010,believeswecankeepthecloudwhilealsokeepingsomeofthecontrolwehavewithpersonalcomputing."Myhopeistofindahappymediumsomewhereinbetween,"hesays.Templetonadvocatesanideacalledthe"datadepositboxmodel".AphotopostedonFacebook,forexample,wouldbekeptona
7、webserverthatyouhadsomecontrolover,whichcouldbeasmallserverinyourhome,orperhapsaneighbourhoodserverrunco-operatively.Theideaisthattherewouldbenoquibbleaboutwhetheryoulegallyownthatphoto,sinceitwouldbestoredsomewhereakintoarentedapartmentorasafetydepositbox,ratherthanonFacebook's
8、third-partyservers.TheimageonFacebook'spageswou
