Electrical& Computer Electrical& Computer Electrical& Computer Electrical& Computer Piezoelectricmaterialisusedasanultrasonictransducerandanignitionelementoflighter.Thematerialgenerateselectricity(electriccharges)whenpressureisapplied,anditdeforms(expandsandcontracts)whenavoltageisappliedonthecontrary.Sincemanyofpiezoelectricceramicsusednowcontainharmfullead,thereisanincreasingdemandforlead-freepiezoelectricmaterials.Thereforeweconductresearchonsuchlead-freepiezoelectricceramics.Furthermore,weareapplyingpiezoelectricceramicstodevelopultrasonicmotors.Wesometimeshavetomakeadecisionimmediately,withnoinformationaboutthefuture.Forexample,“whichisthebetter,torentortobuyaskigear?"Or,“howtopackloadsthatarearrivingoneafteranotherintotrucks?"Ifyouknewaboutthefuture,youcouldmakeagoodchoiceexploitingthatinformation.But,itisoftenthecasethat"nooneknowswhatmayhappentomorrow."Inourlaboratory,werevealthenatureunderlyingsuchsituationsandstudystrategiesandalgorithmsthatrunwithoutfutureinformation.Piezoelectricmaterialcanconvertkineticenergy(pressure,displacement)andelectricalenergy,thusisappliednotonlytoasensorbuttoavibratorandanactuator.Sincetheirperformancesdependonthecharacteristicsofthematerial,itisimportanttodoresearchonthematerialdevelopment.Besides,thedevelopmentofpiezoelectricmaterialrequiresanewdevice.Ourstudentsworkhardtoexploreanewmaterialanditsapplication.Ourgraduatesareworkingatelectricpowdercompaniesandhomeelectricsmakersoraspublicofficials.Iamteachinghowtocarryouttheresearchandsolveproblemsthroughtheresearch,sothatthestudentswillsucceedinplayinanyfields.Ouraimistodesignstrategiesandalgorithmsthatoutputthe"bestpossiblechoice"foreachmomentunderthesettingthatonecanhavehopelesslylittleinformationaboutthefuturelike"nooneknowswhatmayhappentomorrow."Furthermore,weclarifythenatureoftheinherentvalueofinformation,bytheoreticallycomparingthecaseswithorwithoutfutureinformation.Inourlaboratorythestudentsacquireandpolishuptheircomprehensiveskilltosolveproblems.Specifically,theskillconsistsof(1)tograspthenatureunderlyingtheproblemprecisely,and(2)toconsiderwhattoolsorapproachesleadustoasolution.The "ski-rental problem" is equivalent to the choice of a strategy of automatically turning off the backlight on a mobile phone.The "bin-packing problem" has application in several areas such as logistics or distributed systems.Makepiezoelectricceramics.Powderwaspressedintoapelletusingthispressingmachineandfiredatabove1000oC,thenceramicswasobtained.theceramics.ThedielectricconstantorCharacterizationofresonancepropertyaremeasuredwithchangingtemperatureorfrequency.Noriko BambaAssociateProfessorShe worked at Shinshu University after received the Ph.D. (Engineering) in Materials Chemistry atOsakaUniversityin1998.Researchfield:?electronicmaterialsHiroshi FujiwaraAssociateProfessorPh.D. from Kyoto Univ. During his career, he visited Univ. Freiburg and UESTC, China. His research interests include algorithms and optimization.In the FutureAfter GraduationIn the FutureAfter GraduationEngineeringEngineeringEngineeringEngineeringPiezoelectric Material ～Material development and application～ManagingtheUncertaintyoftheFuture
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