Radiowavesarenotvisible,butveryusefulforcellphonesandwirelesscommunications.Ourresearchsubjectintroducedhereis“visiblelightcommunications”.TheinformationcanbecarriedbythevisiblelightemittedfromanLEDbyturningiton/offbasedontheinformationdata.Becauseyouseethelight,youknowwheretheinformationisfrom,andifyouhavetroublereceivingtheinformation,youknowwherethesourceofthetroubleis.Andtheinformationdoesnotreachinthedirectionwhereyoublockthelight(confidentiality).Inaddition,youcancommunicatewitheachotherunderwater,throughtheglass,andeveninplacesprohibitedtouseradiowavessuchashospitals,aslongasthelightreaches..Energy-savingLEDlampsareinstalledeverywhere.SoifsuchLEDlampsareequippedwiththevisiblelightcommunicationfunction,theycansendoutthesignalsofterrestrialdigitalbroadcastingandpositioningsignalslikeGPSinsteadofradiosignals.Andyouwillbeabletogetthedetailedmapofthesurroundingareaunderthestreetlamps.Visiblelightcommunicationisarelativelynewtechnology,soitsfuturedependsontheideasofyoungpeople.Professorsince 2005,after KobeUniversity andNagano National College of Technology. His current research interest is the development of visible light communications.Experiment of visible light communications: Since we need neither wireless-workers license nor radio station license , communication experiment can be done freely in the laboratory.Visible Light Communications（Information transmission by LED light）Experiment of visible light communication over long distance: The world record is 42.19km that is attained by co-working company. We am challenging to satellite communications.Thestudentsgraduatedfromourlabare“workinghardandplayinghard”,whichisourmotto.Theyareactiveintheareasofelectronicsandcommunications,workingatradioequipmentmanufacturersandmobileservice,railroad,electricpowercompanies.ShiroHandaIn the FutureAfter GraduationElectrical& Computer EngineeringPiezoelectricmaterialisusedasanultrasonictransducerandanignitionelementoflighter.Thematerialgenerateselectricity(electriccharges)whenpressureisapplied,anditdeforms(expandsandcontracts)whenavoltageisappliedonthecontrary.Sincemanyofpiezoelectricceramicsusednowcontainharmfullead,thereisanincreasingdemandforlead-freepiezoelectricmaterials.Thereforeweconductresearchonsuchlead-freepiezoelectricceramics.Furthermore,weareapplyingpiezoelectricceramicstodevelopultrasonicmotors.Piezoelectricmaterialcanconvertkineticenergy(pressure,displacement)andelectricalenergy,thusisappliednotonlytoasensorbuttoavibratorandanactuator.Sincetheirperformancesdependonthecharacteristicsofthematerial,itisimportanttodoresearchonthematerialdevelopment.Besides,thedevelopmentofpiezoelectricmaterialrequiresanewdevice.Ourstudentsworkhardtoexploreanewmaterialanditsapplication.AssociateProfessorShe worked at Shinshu University 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 Engineering31
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