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简介:TheGAMMAparadigmisrecentlyproposedbyBanatreandMetayertodescribethesystematicconstructionofparallelprogramswithoutintroducingartificialsequentiality.ThispaperpresentstwosynchronousexecutionmodelsforGAMMAanddiscusseshowtoimplementthemonMasParMP-1,amassivelydataparallelcomputer.TheresultsshowthatGAMMAparadigncanbeimplementedverynaturallyondataparallelmachines,andveryhighlevellanguage,suchasGAMMAinwhichparallelismisleftimplicit,issuitableforspecifyingmassivelyparallelapplications.
简介:TheeffectofstressdistributionduetothechangesofthedistalscrewalignmentinrelationtotheGammanailandthefemoralshaftisthoroughlystudiedinthispaper.FailureoftheGammanailcompositeoccursthroughthecranialapertureofthedistalscrewsandtheinsertionholeforthelagscrewduetononunion,delayed-unionandcontinuedweight-bearing.Athree-dimensionalfiniteelementmodelwasusedtostudythefracturedfemur,theGammanail,thelagscrewandthedistallockingscrews.ThefirstandtheseconddistalscrewswereinsertedintotheGammanailinfourdifferentconfigurations.WefoundthatthestressoftheGammanailcompositewassubstantiallyreducedwiththetwoscrewsconfiguredintheanteriortoposteriordirection.Thisalignmentcanbeargreaterloadinginthemoredemandingfracturetypes.Inthesubtrochantericfractureorthecomminutedfracturesattheproximalfemur,theoptimalalignmentofthetwodistalscrewswasintheanteriortoposteriordirection.
简介:Objective:Todetecttheexistenceofimmunetoleranceinducedbygamma-rayirradiation.Methods:Peritonealcellswereharvestedfrommicesubjectedto5Gy60Cogamma-raytotalbodyirradiationat3d,7d,15dand30d,thentheircounts,morphologicalchangesandIL-12geneexpressionwereinvestigated.Results:Afterirradiation,theperitonealcellsweresharplyreduced,thecellmorphologyshiftedfromround-liketopolymorphicandfusiformwithsomeprocesses,expressionofIL-12p35wasseriouslysuppressed,whilethatofIL-12p40greatlyenhanced.Conclusion:Ourdatahighlysuggestthatthegamma-rayirradiationcouldpotentiallyinducedendriticcell(DC)commitmentandimmunetolerance.
简介:TheserviceprovidedbytheGC(GammaCameras)intheNuclearMedicinedepartmentsfailsbecauseoftheirbreakdown,generallyduetotheassociatedelectronicsandnottothephysicaldetectioncomponents.Forthisreason,itwasdecidedtodevelopanelectronicsystemthatallowstherecoveryandoptimizationofdisusedGC,startingwiththedesignofthepreamplifierforaPMT(photomultipliertube).Thecircuitwasdesignedandsimulatedandthelistofcomponentsnecessaryfortheconstructionofthepreamplifierwasgenerated,aswellastheprintedcircuitboardwasdesignedforitsassembly.Bysimulatingthepreamplifierthisworkedinlinearmode.Thisdeterminesthattheamplitudeoftheoutputsignalisproportionaltotheamountofchargedeliveredbythedetector.ThiscardallowsanautomaticadjustmentofthesignalsofthePMTasdothemodernGC.
简介:Targetplasmas,onwhichtheformationoftheelectrostaticpotentialsandtheim-provementoftheconfinementarestudied,areproducedwithICRFintheGAMMA10tandemmirror.Theiontemperatureofmorethan10keVhasbeenachievedinrelativelylowdensityplasmas.WhenthestrongICRFheatingisapplied,itisobservedthatthehighfrequencyandthelowfrequencyfluctuationsareexcitedandsuppresstheincreaseoftheplasmaparameters.Recently,anewhighpowergyrotronsystemhasbeenconstructedandtheECRHpowerinplugextendsupto370kW.Theimprovementoftheconfinementduetotheformationofthepotentialintheaxialdirectionandthestrongradialelectricfieldshearhasbeenobserved.
简介:摘要过氧化物酶体增殖物激活受体γ(peroxisomeproliferator-activatedreceptorgamma,PPARγ)是一种配体依赖的核转录因子,在脂肪形成、糖代谢、炎症反应、肿瘤及内环境稳定等多种生物学过程中发挥重要作用。近年来关于PPARγ翻译后修饰对机体调控机制的研究越来越多。研究发现PPARγ有多种翻译后修饰,主要包括磷酸化、泛素化、小泛素相关修饰物化(smallubiquitin-relatedmodifiermaterialized,SUMO)、乙酰化、亚硝基化与硝基化等。本文主要对翻译后修饰对PPARγ功能的调控作一综述。
简介:Aninfraredimagedetailenhancementmethodbasedonlocaladaptivegammacorrection(LAGC)isproposed.ThelocaladaptivegammavaluesaredesignedbasedontheWebercurvetoenhanceeffectivelytheimagedetails.Subsequently,theactivegrayscalerangeoftheimageprocessedbyLAGCisfurtherextendedbyusingourproposedhistogramstatisticalstretching.Theexperimentalresultsshowthattheproposedalgorithmcouldconsiderablyincreasetheimagedetailsandimprovethecontrastoftheentireimage.Thus,ithassignificantpotentialforpracticalapplications.
简介:Thisstudyinvestigatedtheeffectofgammaradiationonthedigestibilityandfunctionalpropertiesofricestarch.RicecultivarsIRGA417andIAC202wereusedforisolationofstarchbythealkalinemethod.Starchsampleswereirradiatedwith1,2and5kGydosesof60Coatarateof0.4kGy/h.Acontrolsample,whichwasnotirradiated,wasusedforcomparison.Irradiatedandcontrolstarcheswerecharacterizedbyinvitrostarchdigestibility,totaldietaryfiber,color,waterabsorptionindex,watersolubilityindex,syneresis,swellingfactor,amyloseleaching,pastingpropertiesandgelfirmness.Irradiationschangedstarchdigestibilitydifferentlyineithercultivar.Increasingradiationdosespromotedincreaseinthecolorparameterb*(yellow),elevationinthecapacitytoabsorbwater,andsolubilityinwateraswellastheamyloseleachedfromgranulesforbothcultivars.Pastingpropertiesshowedadecreasethatwasproportionaltothedoseapplied,causedbythedepolymerizationofstarchmolecules.GelfirmnessofthestarchfromIAC202wasinverselyproportionaltotheradiationdoseapplied,whereasforIRGA417,therewasareductionat5kGydose.Ricestarchescanbemodifiedbyirradiationtoexhibitdifferentfunctionalcharacteristicsandtheycanbeusedbythefoodindustriesinproductssuchassoups,desserts,flans,puddingsandothers.