简介:Thecharacteristicofnear-fieldspotsisanalyzed.Thesizeofthenearfieldandtheheatresponsetimeofthehybridrecordmediumtoovercomesuperparamagneticeffectarecalculatedbasedontheheattransfertheory.Anovelmeasuringmethodforthediameterofnear-fieldrecordingspotisalsopresented.Sincethegrainoftherecordingmediaistinyenough,near-fieldopticallithographycanbeaccomplishedwiththeaidofatomicforcemicroscope(AFM).Thediameterofnear-fieldrecordingspotcanbeobtainedbyspecificallydesignedcomputer.Sotherelationshipbetweenthenear-fieldrecordingspotdiameterandtheprobesizeofnear-fieldrecordingsystem,thenearfieldrecordingdistancecouplingbetweenheadanddisccanbegot.
简介:Ananalyticalstudyofthetwodegreesoffreedomnonlineardynamicalsystemispresented.Theinternalmotionofthesystemisseparatedanddescribedbyonefourthorderdifferentialequation.AnapproximateapproachallowsreducingtheproblemtotheDuffingequationwithadequateinitialconditions.Anovelideaforaneffectivestudyofnonlineardynamicalsystemsconsistinginaconceptofthesocalledlimitingphasetrajectoriesisapplied.Bothqualitativeandquantitativecomplexanalyseshavebeenperformed.Importantnonlineardynamicaltransitiontypephenomenaaredetectedanddiscussed.Inparticular,nonsteadyforcedsystemvibrationsareinvestigatedanalytically.
简介:Withanewidea,weredefinegeneralizedfuzzysubnear-rings(ideals)ofanear-ringandinvestigatesomeofitsrelatedproperties.Somenewcharacterizationsaregiven.Inparticular,weintroducetheconceptsofstrongprime(orsemiprime)(∈,∈∨q)-fuzzyidealsofnear-rings,anddiscusstherelationshipbetweenstrongprime(orsemiprime)(∈,∈∨q)-fuzzyidealsandprime(orsemiprime)(∈,∈∨q)-fuzzyidealsofnear-rings.
简介:ThiscollectionofthoughtfulandinterestingstudiesbeganasasymposiumheldattheUniversityofTorontoinMarch1991,where,accordingtotheeditor’spreface,severalofthepaperswerepresented.Theprefatorymaterialisfollowedbyninepaperswhich,usingthesomewhatwryheadingof"deathandtaxes"asatakeoffpoint,illuminateawidevarietyoftopicsoverawidegeographicalandchronologicalrange.Thestudiesdealwithaspectrumofculturalremains,encompassingtexts,art,archaeologicalandarchitecturalmaterials;theyrangeinapproachfromvery"down-to-
简介:Ascanningnear-fieldopticalmicroscopeusinguncoatedfibertipisdescribed,whichcanworkintransmissionandreflectionconfigurations,bothcapableofworkinginilluminationandcollection-mode,sothateithertransparentoropaquesamplecanbeinvestigated.Dependingondifferentapplications,eitherconstant-gaporconstant-heightimagescanbeachieved.Acompacthomemadetranslatorpermitstoselectinterestedareaofsampleintherangeof4mm×4mm.Workingintheconstant-heightaswellastransmissionandcollection-modeconfiguration,severalkindsofsamplessuchasholographicgrating,liposomeandzeolitewereinvestigated.TheexperimentalresultsrevealedthedependenceoftheopticalresolutionoftheSNOMonthetip-sampleseparation.