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1、MScInformationSystems1999HumanComputerInteractionThephysicallevelAdaptedfromthebookHumanInterfaceDesign(Thomas,1999forthcoming,Springer-Verlag)fortheMScInformationSystemsHumanComputerInteractioncourse.?PeterThomas1999IntroductionInchapter1wedevelopedadefinitionofHCIwhichsuggestedthatitwast
2、heinvestigationofinterfaces(physicalcomponentsofasystemwhichallowthecontrolandmanipulationofasystem,byexploitingtheuser’scognitiveabilities,andallowingtheusestogetanunderstandingofthesystem,forthepurposeofperformingsometaskinacontext)withtheaimofdesigningusertechnologyforeaseofuseandeffect
3、ivenessInchapers2and3welookedatthephenomenaoftheuser’scognitiveabilities(intermsoftheModelHumanProcessor),andthephenomenaofusers’understandings(intermsofmentalmodels).Thischapterlooksindetailatphenomenarelatingtophysicalsystemcomponentsofthehumaninterface.1Thechapterisdividedintotwosection
4、s.Section2dealswithinputdevices–thosephysicalsystemcomponentswhichareavailablefortheusertocontrolandmanipulateinformationinacomputersystem.Wewillbelookingbothatthevariousdevicesthatareavailableandalsoatsomeframeworkswithinwhichtoconsiderthephenomomonof‘input’moregenerally.Thesecondsectionl
5、ooksatoutputdevices.Thisismuchshortersection,andlooksprimarilyatvisualoutput.Thissectionbrieflylooksatwhattechnologyiscurrentlyavailable(themostwidely-usedbeingtheconverstionalCRTattachedtomostpersonalcomputers)andalsoatdisplayswhicharejustbecomingavailable(suchastheflat-paneldisplaysusedi
6、nportableandhandheldcomputers).Wewillalsolookatsomeoftheissuesrelatingtothehazardsofdisplaysandsomeoftheregulationsdesignedtolessenthosehazards.InputDevicesThissectionisessentiallyacatalogueofinputdevices.Severaltypesofdevicearediscussedalongwithsomeoftheiradavantagesanddisadvantages,andso
7、meoftheapplicationsforwhichtheyaremostappropriate.However,thepurposeofthissectionisnottoprovideacompletecatagogue;firstlybecausetodosowouldmeanseveralchaptersinitself;secondlybecausetherearemanyotherbooksonuserinterfacedesignwhichprovidestraightforwardcatagogu
