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简介：Withthedevelopmentofwirelessnetworksandmobilecomputing,moreadvancedapplicationswithcontext-awarenessandadaptabilitytotheirchangingcontextareneeded.However,buildingcontext-awareapplicationsisdifficultduetothelackofadequateinfrastructuresupport.Inthispaper,awebmiddlewarearchitectureforthedevelopmentofcontext-awarenessapplicationsusingnearfieldcommunication(NFC)isproposed.Basedonit,theefficientsupportforacquiring,interpreting,andaccessingcontextisprovided,andtheuser’squalityofexperienceisimproved.Moreover,amobilewebmiddlewareforthetestingandfullrealizationofNFCcontext-awarenessapplicationshasbeendevelopedtogetherwithtwoapplicationexamples.

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简介：Evaluationofqualityofsingingisanissuesubjectivelyrealizedbytheexperts.Thispaperpresentstheresultsoftheanalysisofthevibratoparameterinthesinging.Thewell-knownfactistheexistenceofvibratoofsufficientqualityinthevoicesofprofessionalsingers.Theauthorsfocushereonthechoralvoicestoassessthequalityoftheirsingingfromthepointofviewofthevibratoparameter.Themethodpresentedhereisdevelopedtoevaluatethevibratowhilesingingunderconditionsclosetotherealones.Thestudywascarriedoutontherecordingsofthemembersofanacademicchoir.Asaresultoftestsitwasfoundthatnotallsingerspresentthesamequalityofvibratointermsofdeviationofvibratoconfidence(STDCV).

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简介：Climatechangehasbecomewidelyacceptedasachallengethathumanswillfaceinthenot-too-distantfuture.Mountainecosystemsandtheirinhabitantsareamongthemostvulnerabletoclimatechange.ThispaperseekstoexplainmigrationdriversinspecificmountainregionsinthecontextofclimatechangebasedonForesight’sconceptualframework.AclimatechangesensitivefieldnamedShangnanCountyinsouthernShaanxiProvinceischosenasthecasestudyareatoinvestigatelocalmigrationdrivers.Aseriesofqualitativeresearchmethodsisemployedinthecasestudyincludingparticipantobservation,semi-structuredinterviews,andfocusgroupdiscussions.Theevidenceofsurveysuggeststhatmigrationdecisionsarenotonlyshapedbymacrofactorsinaspectsofenvironmental,economics,demographic,social,politicsandpsychological,butalsoinfluencedbyplaced-relatedbarriersandfacilitatingmechanismsandpersonalcharacteristics.