Journal of Rare Earths International Journal of Pharmaceutics International Journal of Research in M.docx
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Journal of Rare Earths International Journal of Pharmaceutics International Journal of Research in M.docx
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JournalofRareEarthsInternationalJournalofPharmaceuticsInternationalJournalofResearchinM
Researchhighlights
►Drawingontheconceptofdisruptivetechnologiesweprovideanewframeworkforproductinnovationforemergingmassmarkets.►Keycomponentsofthisframeworkincludemodularity,architecturalinnovationandcollaborativepartnerships.►WeapplythisframeworktounderstandproductinnovationbyTataMotorsofIndiafortheNano,theworld'scheapestcar.►Thecaseprovidescriticalinsightsintothefrugaluseofresourcesintheinnovationprocessesforanuntappedmarket.►Thestudyhasimportantmanagerialimplicationsfortheglobalautomobileindustry.
116
Negativerefractionandimagingpropertiesofcircularphotoniccrystals OriginalResearchArticle
PhysicaB:
CondensedMatter,Volume406,Issue4,15February2011,Pages1044-1047
Meng-ChuTseng,Hung-WenWang,Lien-WenChen
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AbstractAbstract|Figures/TablesFigures/Tables|ReferencesReferences
Abstract
Theelectromagneticwavepropagationinatwo-dimensional(2D)circularphotoniccrystal(CPC)isinvestigated.TheCPCstructureiscomposedofairholesinthedielectricbackgroundmaterial.ThefiniteelementmethodisusedtostudytheopticalandpropagatingpropertiesoftheCPCslab.Numericalsimulationsshowthatnegativerefractionandnear-fieldimagingcanappearina2DCPCslab.Wealsofindthatthehigh-symmetryCPCslabpossessesanopticsaxisalongtheverticaldirectionintersectingthesymmetriccenter.Asaresult,theCPCslabcanexhibitanexcellentimagingperformancewhenasourceisplacedontheopticalaxis.
ArticleOutline
1.Introduction
2.Systemandmethod
3.Numericalresultsanddiscussion
4.Conclusion
Acknowledgements
References
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Researchhighlights
►TheEMwavepropagationina2Dcircularphotoniccrystalisinvestigated.►Thenegativerefractionandimagingpropertiescanappearin2DCPCs.►CPCswithnegativerefractioncouldprovidepotentialapplicationsinopticalimagingsystems.
117
RAFT:
Arouterarchitecturewithfrequencytuningforon-chipnetworks OriginalResearchArticle
JournalofParallelandDistributedComputing,InPress,CorrectedProof,Availableonline14October2010
AsitK.Mishra,AdityaYanamandra,ReetuparnaDas,SoumyaEachempati,RaviIyer,N.Vijaykrishnan,ChitaR.Das
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Abstract
Withincreasingnumberofcoresbeingintegratedonasingledie,Network-on-Chips(NoCs)havebecomethede-factostandardinprovidingscalablecommunicationbackbonesforthesemulti-corechips.NoCshaveasignificantimpactonthesystem’sperformance,powerandreliability.However,NoCscanbeplaguedbyhigherpowerconsumptionanddegradedthroughputifthenetworkandrouterarenotdesignedproperly.Towardsthisend,thispaperproposesanovelrouterarchitecture,wherewetunethefrequencyofarouterinresponsetonetworkloadtomanagebothperformanceandpower.Weproposethreedynamicfrequencytuningtechniques,FreqBoost,FreqThrtlandFreqTune,targetedatcongestionandpowermanagementinNoCs.Wealsoproposeandevaluateanovelfine-grainedfrequencytuningschemewherewevarythenumberofvirtual-channelsinarouterdynamically.Asafurtheroptimizationtotheseschemes,weproposeafrequencytuningschemewherewetunethefrequencyofthefourportsofameshrouterseparatelyfromthelocalport.Asenablersforthesetechniques,weexploitDynamicVoltageandFrequencyScaling(DVFS)andtheimbalanceinagenericrouterpipelinethroughtimestealing.Wealsoevaluateandanalyzetheproposedschemesfromthepointofviewofreliabilityagainstsofterrorvulnerabilityandprovideguidelinesinchoosingtheappropriateschemewhenreliabilityistheprimedesignconstraint.
Experimentsusingsyntheticworkloadsonan8 × 8wormhole-switchedmeshinterconnectshowthatFreqBoostisabetterchoiceforreducingaveragelatency(maximum40%)while,FreqThrtlprovidesthemaximumbenefitsintermsofpowersavingandenergydelayproduct(EDP).TheFreqTuneschemeisabettercandidateforoptimizingbothperformanceandpower,achievingonanaverage36%reductioninlatency,13%savingsinpower(upto24%athighload),and40%savings(upto70%athighload)inEDP.Withapplicationbenchmarks,weobserveIPCimprovementupto23%usingourdesign.OuranalysisshowsFreqBoosttobethemostrobustschemeamongstthethreeschemeswhenreliabilityisaconcern.
ArticleOutline
1.Introduction
2.Frequencytuningrationale
2.1.FreqBoosttechnique
2.2.FreqThrtltechnique
2.3.FreqTunetechnique
3.Routerandnetworkarchitecture
3.1.Frequencyscaling
3.2.Timestealinginrouterpipeline
3.3.Architecturalsupportforfrequencyadaptationandhardwareimplementation
3.3.1.Asynchronouscommunication
3.3.2.Hardwareimplementation
4.Performanceevaluation
4.1.Experimentalplatform
4.2.Resultswithsyntheticworkload
4.3.Resultswithcolumn-wisecontrollers
4.4.Furtheroptimizations
4.4.1.Analysiswithlocal-PEawarefrequencytuning
4.4.2.Fine-grainedfrequencytuningscheme
4.5.Reliabilityanalysisoffrequencytuningtechniques
4.5.1.FreqThrtlusingDVFSonly
4.6.Resultswithapplicationbenchmarks
5.Relatedwork
5.1.On-chipnetworks
5.2.DVFSandtime-stealingtechniques
6.Conclusions
Acknowledgements
References
Vitae
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118
Cross-phasemodulationinducedphasefluctuationsinopticalRZpulsepropagatingindispersioncompensatedWDMtransmissionsystems OriginalResearchArticle
OpticsCommunications,Volume283,Issue9,1May2010,Pages1899-1904
MohammadFaisal,AkihiroMaruta
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Abstract
Thebasicmechanismofcross-phasemodulationinducedphasefluctuationsinopticalRZpulsepropagatinginaperiodicallydispersioncompensatedtransmissionlinehasbeeninvestigated.Ordinarydifferentialequationshavebeenderivedusingvariationalanalysistoestimatethephasefluctuationandtheanalyticalresultisverifiedbynumericalsimulationsbasedonsplit-stepFouriermethod.Wethereforeexploretheimpactofdifferentdispersioncompensationmapsonphasefluctuationfor10 Gb/sand40 Gb/sWDMtransmissionsystems.Theeffectsofinitialpulsespacingbetweenchannels,channelspacingandresidualdispersiononphaseshifthavebeenstudied.Wefindthatcross-phasemodulationinducedphasefluctuationcanbemitigatedbyproperadjustmentofchannelspacingand/orresidualdispersion.
ArticleOutline
1.Introduction
2.Theoreticalanalysis
3.Systemdescriptionandbasicmechanismofcollision-inducedphaseshift
4.Effectofinitialpulsespacingbetweenchannels
5.Effectofchannelspacingandresidualdispersion
6.Conclusions
Acknowledgements
References
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119
Phononicandphotonicbandgapstructures:
modellingandapplications OriginalResearchArticle
PhysicsProcedia,Volume3,Issue1,1January2010,Pages357-364
MarioN.Armenise,CarloE.Campanella,CaterinaCiminelli,FrancescoDell’Olio,VittorioM.N.Passaro
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Abstract
Photoniccrystals(PhCs)areartificialmaterialswithapermittivitywhichisaperiodicfunctionoftheposition,withaperiodcomparabletothewavelengthoflight.Themostinterestingcharacteristicofsuchmaterialsisthepresenceofphotonicbandgaps(PBGs).PhCshaveveryinterestingpropertiesoflightconfinementandlocalizationtogetherwiththestrongreductionofthedevicesize,ordersofmagnitudelessthantheconventionalphotonicdevices,allowingapotentialveryhighscaleofintegration.Thesestructurespossessuniquecharacteristicsenablingtooperateasopticalwaveguides,highQresonators,selectivefilters,lensorsuperprism.Theabilitytomouldandguidelightleadsnaturallytonovelapplicationsinseveralfields.
Bandgapformationinperiodicstructuresalsopertainstoelasticwavepropagation.Compositematerialswithelasticcoefficientswhichareperiodicfunctionsofthepositionarenamedphononiccrystals.Theyhavepropertiessimilartothoseofphotoniccrystalsandcorrespondingapplicationstoo.Byproperlychoosingtheparametersonemayobtainphononiccrystals(PhnCs)withspecificfrequencygaps.Anelasticwave,whosefrequencylieswithinanabsolutegapofaphononiccrystal,willbecompletelyreflectedbyit.Thispropertyallowsrealizingnon-absorbingmirrorsofelasticwavesandvibration-freecavitieswhichmightbeusefulinhigh-precisionmechanicalsystemsoperatinginagivenfrequencyrange.Moreover,onecanuseelasticwavestostudyphenomenasuchasthoseassociatedwithdisorder,inmoreorlessthesamemanneraswithelectromagneticwaves.
Theauthorspresentinthispaperanintroductorysurveyofthebasicconceptsofthesenewtechnologieswithparticularemphasisontheirmainapplications,togetherwithadescriptionofsomemodellingapproaches.
120
Performanceevaluationanddesigntradeoffsofon-chipinterconnectarchitectures OriginalResearchArticle
SimulationModellingPracticeandTheory,InPress,CorrectedProof,Availableonline22October2010
M.Bakhouya,S.Suboh,J.Gaber,T.El-Ghazawi,S.Niar
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