工学部_研究紹介_2020_英語版
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Piezoelectricmaterialisusedasanultrasonictransducerandanignitionelementoflighter.Thematerialgenerateselectricity(electriccharges)whenpressureisapplied,anditdeforms(expandsandcontracts)whenavoltageisappliedonthecontrary.Sincemanyofpiezoelectricceramicsusednowcontainharmfullead,thereisanincreasingdemandforlead-freepiezoelectricmaterials.Thereforeweconductresearchonsuchlead-freepiezoelectricceramics.Furthermore,weareapplyingpiezoelectricceramicstodevelopultrasonicmotors.Piezoelectricmaterialcanconvertkineticenergy(pressure,displacement)andelectricalenergy,thusisappliednotonlytoasensorbuttoavibratorandanactuator.Sincetheirperformancesdependonthecharacteristicsofthematerial,itisimportanttodoresearchonthematerialdevelopment.Besides,thedevelopmentofpiezoelectricmaterialrequiresanewdevice.Ourstudentsworkhardtoexploreanewmaterialanditsapplication.AssociateProfessorI worked at ShinshuUniversity after received the Ph.D. (Engineering) in Materials Chemistry atOsakaUniversityin1998.Researchfield:・electronicmaterialsMakepiezoelectricceramics.Powderwaspressedintoapelletusingthispressingmachineandfiredatabove1000oC,thenceramicswasobtained.Piezoelectric Material ~Material development and application~Characterizationoftheceramics.Thedielectricconstantorresonancepropertyaremeasuredwithchangingtemperatureorfrequency.Ourgraduatesareworkingatelectricpowdercompaniesandhomeelectricsmakersoraspublicofficials.Iamteachinghowtocarryouttheresearchandsolveproblemsthroughtheresearch,sothatthestudentswillsucceedinplayinanyfields.Noriko BambaIn the FutureAfter GraduationElectrical& Computer EngineeringHiroshi FujiwaraWesometimeshavetomakeadecisionimmediately,withnoinformationaboutthefuture.Forexample,“whichisthebetter,torentortobuyaskigear?"Or,“howtopackloadsthatarearrivingoneafteranotherintotrucks?"Ifyouknewaboutthefuture,youcouldmakeagoodchoiceexploitingthatinformation.But,itisoftenthecasethat"nooneknowswhatmayhappentomorrow."Inourlaboratory,werevealthenatureunderlyingsuchsituationsandstudystrategiesandalgorithmsthatrunwithoutfutureinformation.Ouraimistodesignstrategiesandalgorithmsthatoutputthe"bestpossiblechoice"foreachmomentunderthesettingthatonecanhavehopelesslylittleinformationaboutthefuturelike"nooneknowswhatmayhappentomorrow."Furthermore,weclarifythenatureoftheinherentvalueofinformation,bytheoreticallycomparingthecaseswithorwithoutfutureinformation.AssociateProfessorPh.D. from Kyoto Univ. During his career, he visited Univ. Freiburg and UESTC, China. His research interests include algorithms and optimization.The "ski-rental problem" is equivalent to the choice of a strategy of automatically turning off the backlight on a mobile phone.ManagingtheUncertaintyoftheFutureThe "bin-packing problem" has application in several areas such as logistics or distributed systems.Inourlaboratorythestudentsacquireandpolishuptheircomprehensiveskilltosolveproblems.Specifically,theskillconsistsof(1)tograspthenatureunderlyingtheproblemprecisely,and(2)toconsiderwhattoolsorapproachesleadustoasolution.After GraduationIn the FutureElectrical& Computer Engineering34

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