kayaker escaped great white shark on cape cod

... question about a spot he knew intim- ately, and the temptation to exhibit his superiority over us had proved too great. Not only was his nationality a secret, but many of his actions puzzled us considerably. ... other fellows to understand our conversation we spoke in his tongue. But of what he was saying to this stranger, I could only under- stand one or two words and they conveyed to me no meaning. The ... contortions of the victim's face. Yet those assembled were gleeful and excited. Omar was the son of their unconquerable enemy, and they delighted in witnessing his humili- ation and agony....

Ngày tải lên: 17/02/2014, 21:20

... bán đảo Cape Cod có hình dạng gần giống một thiếu phụ cúi đầu nhớ xa xăm, đây là địa điểm du lịch mà dân Boston rất tự hào khi giới thiệu với du khách. Mùa hè là thời gian mà Cape Cod thu hút ... biển Cape Cod đã được khai thác du lịch, nhưng tuyệt đối không có khách sạn nào được đặc quyền nằm trên bãi biển. Tất cả đều phải lùi vào trong, để bảo đảm rằng món quà tuyệt vời nhất mà Cape Cod ... mắt, một bên là rừng thông thanh tĩnh, thị trấn của vùng Cape Cod luôn có khí hậu se lạnh, ngay cả vào mùa hè. Không thể không nghĩ Cape Cod như là sự tổng hợp của Đà Lạt và Nha Trang khi bạn...

Ngày tải lên: 24/02/2014, 16:20

... diaspora. She conducted fieldwork on iden- tity formation among Cape Verdeans in Boston, Massachusetts, and in the islands. Her current research focuses on the construction of Cape Verdean diasporic ... produced a population of mixed origin that soon became the majority among the inhabitants. Being settled by colonialists and developed on the basis of slavery and a plantation economy, Cape Verde’s ... of migration (A ˚ kesson 2004). Soon after the end of slavery in Cape Verde, the Portuguese colonial power started encouraging the migration of Cape Verdeans to other Portuguese colonies in Africa...

Ngày tải lên: 06/03/2014, 00:22

... the interior, and I confess I soon began to tire of the monotony of the terrible gloom. But to all my questions Omar would reply: "Patience. In Africa we have violent contrasts always. To-day ... contortions of the victim's face. Yet those assembled were gleeful and excited. Omar was the son of their unconquerable enemy, and they delighted in witnessing his humili- ation and agony. ... subjects, until I found I could under- stand a large portion of a conversation and could even give directions to our carriers in their own tongue. Omar was in high spirits, eager, it seemed, to return...

Ngày tải lên: 06/03/2014, 17:20

... DRAFTWorkingPapersVersion040510 eithersettleforexcessdiethatfoundriesfabricatedforsomeotherapplication,ortrytocomeupwithadesign thatsomefoundrycanthenfabricatebutwithnoguaranteethatitwillworkasdesired.Furthermore,thelackof softwaredesigntoolsandconsistentqualifiedprocessesmeanquickturnaroundisnotpossible.Eveniftheinitial diesworkasdesired,thereisnoguaranteethatthediesfabricated on subsequentrunswillhavecomparable performance. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42  TheOEICwillrequirenewtechniquesandtoolsforincorporatingnon‐siliconmaterialsintotheCMOSprocess.The challengesaresignificantduetothedifferencesinlatticeconstants,whichcausethreadingdislocations,and differencesinmeltingpointsofdifferentmaterials.Forexample,theannealingtemperaturefortheCMOS transistorsourceanddrain,whichisabout1000°C,ismorethan50°abovethemeltingpointofgermanium—the preferredmaterialfora40Gbpsavalanchegainphotodetector.Notwithstandingthesechallenges,IBMhas fabricatedatransceivercompletelyinCMOS,includingafibercoupler,6‐channelWDMthatisonly20by70 microns.Eachchannelconnectstoa100‐micronlongmodulator,whichdirectlyconnectstotheelectronicdriver andadetectorthatisonly10micronslong.Thetotaldevicewithoutaringresonatorassistisonly0.5mmlong; witharingresonator,itisonly0.1mmlong. 10  NanocompositeStructuralMaterials Anareaofgrowingimportanceisdevelopmentofnano‐enhancedadvancedcompositesandrelatedstructures. SignificantdevelopmentsareunderwayintheindustrialscaleproductionofCNTsandincorporatingCNTswithin traditionalconstituentmaterialsusedtomanufacturefiberreinforcedPMCs. CNTsarehollowcylindersthatconsistofindividualormultiplewallsofagraphitelatticestructure.Multi‐walled carbonnanotubes(MWCNTs)aregenerallyeasiertoproduceandlessexpensivetomanufacturethansingle‐ walledcarbonnanotubes(SWCNTs). 11 CNTspossessextraordinarytensilestrengthandexceptionalstiffness. On a strength‐to‐weightbasis,CNTsareunmatchedbyanyothermaterial.CNTsalsopossessespeciallyhighthermal conductivityandstabilitywhilesomevariantsofCNTspossessespeciallyhighelectricalconductivityandchemical resistance. FiberreinforcedPMCsrepresentthelargestandmostdiverseapplicationforcompositescomparedwiththose producedwithmetal,ceramicorothermatrixmaterials.ApplicationsforPMCsarehighlydiverseincluding sportinggoods,aerospacedefense,andautomotive.WhilePMCshavebeeninusefordecades,theintroductionof nano‐enhancedPMCsisarecenttechnologicaldevelopmentwhichhaslargescalecommercialpotentialofacross virtuallyallmajoreconomicsectors(e.g.,publicworks,heavyindustry,energyproduction,powerdistribution, shipbuilding,consumerproducts,medicalequipment,groundtransportation,commercialaircraft,spaceanda hostofmilitaryuses). Carbonnanotubesareofrelativelyrecentorigin,withsingle‐wallCNTsbeingdiscoveredintheearly1990sand productionprocessesdevelopedsincethattime.ThereforelargescalecommercialuseofCNTsinPMCshasbeen justgettingunderwayoverthelastfewyearsbeginningwithasmallhandfulofapplications.Anumberof companiesareactivelyinvolvedwithincorporatingCNTsintovariousconstituentmaterialsthatareusedto manufacturePMCs.Nano‐enhancedconstituentmaterialscansignificantlyimprovethematerialpropertiesof PMCsandattendantstructures(e.g.,higherstrengthandlighterweight)byleveragingtheextraordinaryproperties ofCNTs.ExamplesofthetypesofPMCconstituentmaterialsthatcanbeenhancedbyCNTsincludethermoplastic andthermosetresins,adhesivesandresininfusedtextiles(knownas“prepregs”)thataresubsequentlyfabricated intolaminatedandotherPMCstructures.Additionalapproachestonano‐enhancedPMCsincludesincorporating CNTsintothemanufactureofexistingfibersareusedtoreinforcePMCsaswellasdevelopingentirelyalternative formsofnewfibersproducedfromCNTs.  10 YuriVlasov,IBMResearch,“Transitionfromtelecommtodatacommtocomputercomm,”OIDAPhotonicIntegrationForum, October6,2009,SantaClara,CA. 11 SWCNThaveadiameter on theorderof1to3nanometers(nm)  whilethediameterofaMWCNTcanaveragefrom8to10 nms.TheindividualwallthicknessofCNTsmeasuresanatomthickandthelengthofCNTscanreachseveralmillimeters(mm).  ... DRAFTWorkingPapersVersion040510 Appendix1‐A:AdvancedTechnologyManufacturingFrontiers1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44  IntegratedOptoelectronics Photonics,alsoknownasoptoelectronics(OE),isthattechnologyspacewhereinformationsignalscarriedby electronsareconvertedtophotonsandviceversa(O‐E‐O).Photonstransportinformationintheformof amplitude,wavelength,andphase—oranycombinationoftheabove.Photonicdevicesareeitheractiveor passive.Passivedevicesmerelytransporttheinformation‐carryingphotonsfromonelocationtoanother.Active componentsperformsomefunction—convertelectronsintolight(lasers,displays),convertphotonsintoelectrons (chargecoupleddevicesensors,avalanchephotodiodes),mergestreamsofdata‐carryingphotons(multiplexors), separateoutmergedstreamsofdata‐carryingphotons(demultiplexors)andimpartdata on astreamofphotons (modulators.) Theapplicationofphotonicscoverssuchdiverseareasasindustriallasers,consumerelectronics, telecommunications,datastorage,biotechnology,medicine,generalillumination,anddefense.Eachofthese applicationspaceshasasupplychainandinfrastructurethatstartswithbasicmaterialsandendsatacompleted product.Alongthischainaresubchainsthatprovidetheindividualcomponentsorsubsystemsthatmakeupthe finishedproduct. Akeydynamicinphotonicsistheevolutionfromdiscretephotonicdevicestointegratedsystems.Thisintegration isdrivenbytheneedforincreasedperformancewhilesimultaneouslyreducingcostandpowerconsumptionto meettheburgeoningdemandsfortelecommunicationsanddatacommunications—whichthemselvesare becomingincreasinglyintegrated. PhotonicIntegrationforTelecommandDatacomm TelecommunicationsnetworksanddatacentersthatsupportthecommunicationsinfrastructureandtheInternet willrequireintegratedphotonicstomeetdemandsthatwilloverwhelmthemassiveswitchingcentersthatroute themessagesanddataaroundthefiberopticnetwork.Thesecenterstypicallycontainthousandsofracksof electronicrouters,inbuildingsthatcoveracres,andconsumeabout30megawattsofelectricpower.Asnew mobiledevicesandinternetvideocontentincreasethebandwidthcapacitydemand on thenetwork,theservice providershavetoincreasethenumberofchannelscarriedbyasinglestrandofopticalfiber.Simplyincreasingthe electroniccontentofaracktoaccommodateincreasedbandwidthisnotpossiblebecauseoftheassociated increaseinpowerconsumptionandheatdissipation.Thesolutionliesinphotonicintegration. 9  Photonicintegratedcircuits(PICs)combinemultipleopticandelectro‐opticcomponentsontoachip.Today’sPIC technologyiscomparabletothatofmicroelectroniclarge‐scaleintegration(LSI)ICsofthe1960s—about200to 300elements on asinglechip.MostofthePICstodayarehybrid—theyconsistofasiliconsubstratewithanumber ofmonolithicallyintegratedcomponents,andanumberofcomponentsfabricatedfromothermaterials mechanically,optically,andelectronicallyconnectedtothesubstrate.PICsrequirecomponentsfabricatedfrom othermaterialsbecausesilicondoesnotsupportalaser.Technologiesandfabricationtoolsareneededthatwould supportmonolithicintegrationofsiliconwithothermaterialstoenablePICstomovetohigherlevelsofintegration andtakeadvantageoftheexistingsiliconCMOSinfrastructure. Thepriceofincreasedbandwidthisincreasedcomplexityandpowerconsumption.Thesystemrequiresmore componentstoextractandgroomtheelectricalsignalsfromtheseincreasinglycomplexopticalsignalsandconvert themintoaformthatelectronicprocessorscanmanipulate.EachO‐E‐Orequiresmanydiscrete,single‐function opticalcomponents,includinglasers,modulators,wavelengthlockers,detectors,attenuators,wavelengthdivision multiplexers(WDM)andde‐multiplexers.Inatypicalopticaltransportsystem,eachO‐E‐Oconversionmayrequire uptohalfadozenoptoelectronicoropticalcomponents,andafullydeployed40‐wavelengthWDMterminalnode mayuseupwardsof120ormorecomponentsinterconnectedby260ormorefibercouplings.Eachofthesefiber couplingsrepresentscost,signallosses,andapotentialfailurepoint.  9 BikashKoley,“NetworkArchitectatGoogle,”presentationattheOIDAPhotonicIntegrationForum,October6,2009,Santa Clara,CA.  ... DRAFTWorkingPapersVersion040510 Appendix1‐A:AdvancedTechnologyManufacturingFrontiers1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44  IntegratedOptoelectronics Photonics,alsoknownasoptoelectronics(OE),isthattechnologyspacewhereinformationsignalscarriedby electronsareconvertedtophotonsandviceversa(O‐E‐O).Photonstransportinformationintheformof amplitude,wavelength,andphase—oranycombinationoftheabove.Photonicdevicesareeitheractiveor passive.Passivedevicesmerelytransporttheinformation‐carryingphotonsfromonelocationtoanother.Active componentsperformsomefunction—convertelectronsintolight(lasers,displays),convertphotonsintoelectrons (chargecoupleddevicesensors,avalanchephotodiodes),mergestreamsofdata‐carryingphotons(multiplexors), separateoutmergedstreamsofdata‐carryingphotons(demultiplexors)andimpartdata on astreamofphotons (modulators.) Theapplicationofphotonicscoverssuchdiverseareasasindustriallasers,consumerelectronics, telecommunications,datastorage,biotechnology,medicine,generalillumination,anddefense.Eachofthese applicationspaceshasasupplychainandinfrastructurethatstartswithbasicmaterialsandendsatacompleted product.Alongthischainaresubchainsthatprovidetheindividualcomponentsorsubsystemsthatmakeupthe finishedproduct. Akeydynamicinphotonicsistheevolutionfromdiscretephotonicdevicestointegratedsystems.Thisintegration isdrivenbytheneedforincreasedperformancewhilesimultaneouslyreducingcostandpowerconsumptionto meettheburgeoningdemandsfortelecommunicationsanddatacommunications—whichthemselvesare becomingincreasinglyintegrated. PhotonicIntegrationforTelecommandDatacomm TelecommunicationsnetworksanddatacentersthatsupportthecommunicationsinfrastructureandtheInternet willrequireintegratedphotonicstomeetdemandsthatwilloverwhelmthemassiveswitchingcentersthatroute themessagesanddataaroundthefiberopticnetwork.Thesecenterstypicallycontainthousandsofracksof electronicrouters,inbuildingsthatcoveracres,andconsumeabout30megawattsofelectricpower.Asnew mobiledevicesandinternetvideocontentincreasethebandwidthcapacitydemand on thenetwork,theservice providershavetoincreasethenumberofchannelscarriedbyasinglestrandofopticalfiber.Simplyincreasingthe electroniccontentofaracktoaccommodateincreasedbandwidthisnotpossiblebecauseoftheassociated increaseinpowerconsumptionandheatdissipation.Thesolutionliesinphotonicintegration. 9  Photonicintegratedcircuits(PICs)combinemultipleopticandelectro‐opticcomponentsontoachip.Today’sPIC technologyiscomparabletothatofmicroelectroniclarge‐scaleintegration(LSI)ICsofthe1960s—about200to 300elements on asinglechip.MostofthePICstodayarehybrid—theyconsistofasiliconsubstratewithanumber ofmonolithicallyintegratedcomponents,andanumberofcomponentsfabricatedfromothermaterials mechanically,optically,andelectronicallyconnectedtothesubstrate.PICsrequirecomponentsfabricatedfrom othermaterialsbecausesilicondoesnotsupportalaser.Technologiesandfabricationtoolsareneededthatwould supportmonolithicintegrationofsiliconwithothermaterialstoenablePICstomovetohigherlevelsofintegration andtakeadvantageoftheexistingsiliconCMOSinfrastructure. Thepriceofincreasedbandwidthisincreasedcomplexityandpowerconsumption.Thesystemrequiresmore componentstoextractandgroomtheelectricalsignalsfromtheseincreasinglycomplexopticalsignalsandconvert themintoaformthatelectronicprocessorscanmanipulate.EachO‐E‐Orequiresmanydiscrete,single‐function opticalcomponents,includinglasers,modulators,wavelengthlockers,detectors,attenuators,wavelengthdivision multiplexers(WDM)andde‐multiplexers.Inatypicalopticaltransportsystem,eachO‐E‐Oconversionmayrequire uptohalfadozenoptoelectronicoropticalcomponents,andafullydeployed40‐wavelengthWDMterminalnode mayuseupwardsof120ormorecomponentsinterconnectedby260ormorefibercouplings.Eachofthesefiber couplingsrepresentscost,signallosses,andapotentialfailurepoint.  9 BikashKoley,“NetworkArchitectatGoogle,”presentationattheOIDAPhotonicIntegrationForum,October6,2009,Santa Clara,CA. ...

Ngày tải lên: 09/03/2014, 00:20

... away the thick crimson carpet placed it upon the floor of polished marble in front of Samory's divan. A slave boy had, in response to a sign from the great chief, lit his long pipe with its ... other fellows to understand our conversation we spoke in his tongue. But of what he was saying to this stranger, I could only under- stand one or two words and they conveyed to me no meaning. The ... the Doctor's study, where a long consultation took place. Meanwhile among the fellows much speculation was rife as to who the stranger was, the popular opinion being that Trigger should not...

Ngày tải lên: 15/03/2014, 16:20

... narrative is often concerned. CONTENTS The Great White Army, by Max Pemberton 2 "Bon garcon," said I, "you must have many surgeons of your own in Moscow. Why ask me, who am on my way to ... that it had contained an invitation to dinner in a house beyond the suburbs of the city. When I charged Leon with it he shook his head and smiled in his boyish way. "Oh, mon oncle," ... like the sansculottes of the Revolution, swarmed up on the mock scaffold and cried curses upon their prisoner. The executioner was a huge Tartar with a monstrous black beard and a knife at his...

Ngày tải lên: 17/03/2014, 23:20

... .293 Accommodations Index . . . . . .304 Restaurant Index . . . . . . . . . . .305 v CONTENTS List of Maps Cape Cod 6 Cape Cod & the Islands 17 The Upper Cape 63 Falmouth Area 79 The Mid Cape 101 Hyannis ... tickets if you log onto www.steamship authority.com. See p. 35. THE UPPER CAPE Falmouth has several new restaurants on the scene, and one is surely one of the best on the Cape. Phusion Grille (Woods ... sections of the Cape. The distinction is thought to allude to the longitude, which decreases as you head east. Many find it helpful to use the analogy of the “arm” of Cape Cod, with the upper cape...

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Ngày tải lên: 24/10/2014, 17:25

... truyền lan trong không gian thì véctơ cường độ điện trường và véctơ cảm ứng từ có phương A. song song với phương truyền sóng. B. song song với nhau. C. vuông góc với nhau và song song với phương ... dung C 0 . Giá trị C 0 và cách ghép C 0 với C là A. ghép song song, C 0 = 250 (àF). B. ghộp ni tip, C 0 = 250 (àF). C. ghộp song song, ).F( 500 C 0 à = D. ghộp ni tip, ).F( 500 C 0 à = Cõu ... nào sau đây là sai khi nói về tia γ ? A. Khi đi trong không khí, tia γ làm ion hoá chất khí và mất dần năng lượng. B. Tia γ không bị lệch trong điện trường và từ trường. C. Tia γ phóng ra từ...

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