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　　ASIwalkacrossthewood-tiledfloorofanIKEA-furnishedlivingroom,myfootstepsappear（in）realtimeasshimmeringbluefootfallsona（computerised）mapoftheroom.Inonecorner,arobotwithasinglepurpleeyestands,brooding.

　　WhatI'mseeingistherobot'slaser-radarview,shownonanearbylaptop,oftheobstaclesonthefloor--andIamjustoneofthoseobstacles.ThisismyfirsttasteofthetechnologythattwelveBritishvolunteerswillexperienceastheylivewithaselectionofdomesticrobotsinasemi-detachedhouseinHatfield,UK,overthenextfewmonths.

　　ThesevolunteerswillbehelpingroboticistsaspartoftheLivingwithRobotsandInteractiveCompanions(LIREC)project.Itaims（toworkout）howsquadronsofrobotscanbetrulyuseful（to）people,howtheycandososafely,andestablishjusthowmanyrobotspeoplecancopewithatanyonetime.LeadresearcherKirstenDautenhahnandhercolleaguesattheUniversityofHertfordshire,alsoinHatfield,haveanadvantageoverothers（attemptingto）assessdomesticrobots:theyhaveboughtaregularhousetogroundtheirresearchintherealitiesofdomesticlife.

　　HerteamcomprisespsychologistDagSverreSyrdal,adaptivesystemsengineerKhengLeeKoayandroboticsengineersMohammadRezaOskoeiandSteveHo."Thehigh-levelaimhereistodeveloprobotsthatcanassistpeopleintheirhouseholdenvironment.Andparticularlyhelptheelderlywithfetchingandcarryingthingsaround,withmemoryissues--likerememberingtheirmedicationschedules--andperhapshelpthemaccessentertainment,"saysKoay.

　　Theyhavepopulatedtheirhousewithfourrobots,twoofthemwheeledandtwofour-legged.Thesecompriseamedicationscheduling/dispensingrobotdubbedSunflower,builtattheUniversityofHertfordshire,arobot-arm-equippedCareRobotfromtheFraunhoferInstituteforProductionTechnologyandAutomationinStuttgart,Germany,forfetchingandcarryingfood,drinkandhouseholditems,plustwoSonyAiboroboticdogsforentertainment.

　　Akeyideaisthatonlyonerobotcanbeactiveatatime,tosparehumanusersfromtheriskof"cognitiveoverload"iftoomanyrobotsseektheirattentionatonce.Whenonefinishesataskandanotherneedstobecomeactive,dataiswirelesslymigratedfromone--whichenterssleepmode--toanother,whichwakesupandknowsyourrecentrequests.

　　Butdoesitwork?Itakeaseatandthepurple-eyedCareRobot,whosedouble-jointedrobotarmlookslikeitcouldthrowtogetheracarifyouletit,makesitswayovertome.Itbringsmeafruitdrinkonatrayand,todemonstrateitsdexterity,awoollyhatthatImustgentlypullfromitsthreegraspingfingers.Itapproachedmeinawide,sweepingmotionsoIcouldseeitcoming,butinasubsequentmeetingitsuddenlyappeared,startlingly,atmyside.Ipreferredthesweepingmotion,butitdidblocktheTV.Sucharethebehaviouralnuancesthevolunteerswillreporton.

　　CareRobotthenswishesbacktoacornerandmigratesitsbraindatatoSunflower,whichhasanLCDtouchscreenfordeliveringmessagesandadraweronitsfrontfordeliveringmedication.Itisalsowirelesslyawareofthehouse'selectricalgrid,soitcansensewhenthekettleisbeingboiledorthefridgedooropenedbythetelltalecurrentdrainmeasuredbyasmartmeter:botharesignalsforittogoandseewhatitshumanmasterisuptointhekitchen.