简介：AbstractBackground:The ongoing COVID-19 pandemic hit South America badly with multiple waves. Different COVID-19 variants have been storming across the region, leading to more severe infections and deaths even in places with high vaccination coverage. This study aims to assess the spatiotemporal variability of the COVID-19 pandemic and estimate the infection fatality rate (IFR), infection attack rate (IAR) and reproduction number (R0) for twelve most affected South American countries.Methods:We fit a susceptible-exposed-infectious-recovered (SEIR)-based model with a time-varying transmission rate to the reported COVID-19 deaths for the twelve South American countries with the highest mortalities. Most of the epidemiological datasets analysed in this work are retrieved from the disease surveillance systems by the World Health Organization, Johns Hopkins Coronavirus Resource Center and Our World in Data. We investigate the COVID-19 mortalities in these countries, which could represent the situation for the overall South American region. We employ COVID-19 dynamic model with-and-without vaccination considering time-varying flexible transmission rate to estimate IFR, IAR and R0 of COVID-19 for the South American countries.Results:We simulate the model in each scenario under suitable parameter settings and yield biologically reasonable estimates for IFR (varies between 0.303% and 0.723%), IAR (varies between 0.03 and 0.784) and R0 (varies between 0.7 and 2.5) for the 12 South American countries. We observe that the severity, dynamical patterns of deaths and time-varying transmission rates among the countries are highly heterogeneous. Further analysis of the model with the effect of vaccination highlights that increasing the vaccination rate could help suppress the pandemic in South America.Conclusions:This study reveals possible reasons for the two waves of COVID-19 outbreaks in South America. We observed reductions in the transmission rate corresponding to each wave plausibly due to improvement in nonpharmaceutical interventions measures and human protective behavioral reaction to recent deaths. Thus, strategies coupling social distancing and vaccination could substantially suppress the mortality rate of COVID-19 in South America.

简介：信息产业时代的到来，中国载人飞船的成功发射，数码风暴的“狂风巨浪”，都为我们生活的祥和空间平添一份精彩！

简介：DboyAttackTools可以用于扫描网站，测试上传漏洞．Cookies欺骗等等，又是一款典型的集成性软件。除了集成动网经典的上传漏洞利用工具外．它还新增了一个购物商城上传漏洞利用工具．二者都可以直接上传木马．很方便哦。

简介：用来清理和分离粘接不合适的材料．包括金属、石头、玻璃、木头等类似的材料，将其上已凝固的环氧和聚酯树脂清洗干净．并且不会对其表面产生任何破坏作用。

简介：Thispaperpresentsanewmethodforresynchronizationattack,whichisthecombinationofthedifferentialcryptanalysisandalgebraicattack.Byusingthenewmethodonegetsasystemoflinearequationsorlow-degreeequationsaboutinitialkeys,andthesolutionofthesystemofequationsresultsintherecoveryoftheinitialkeys.Thismethodhasalowercomputationalcomplexityandbetterperformanceofattackincontrasttotheknownmethods.Accordingly,thedesignoftheresynchronizationstreamgeneratorsshouldbereconsideredtomakethemstrongenoughtoavoidourattacks.WhenimplementedtotheToyocrypt,ourmethodgainsthecomputationalcomplexityofO(217),andthatofO(267)forLILI-128.

简介：AnapproachofdefendingagainstDistributedDenialofService(DDoS)attackbasedonflowmodelandflowdetectionispresented.TheproposedapproachcanprotecttargetsfromDDoSattacking,andallowtargetstoprovidegoodservicetolegitimatetrafficunderDDoSattacking,withfastreaction.Thisapproachadoptsthetechniqueofdynamiccombfilter,yieldsalowleveloffalsepositivesoflessthan1.5%,dropssimilarpercentageofgoodtraffic,about1%,andpassesneglectablepercentageofattackbandwidthtothevictim,lessthan1.5%.Theprototypeofcommercialproduct,D-fighter,isdevelopedbyimplementingthisproposedapproachonIntelnetworkprocessorplatformIXP1200.

简介：Wolbachia是感染大量节肢动物和丝虫的线虫的细胞内部的共生者。蚜虫从事与他们的endosymbionts的多样、复杂的关系。Wolbachia的四超群(A，B，M和N)以前在蚜虫和超群M被检测，N仅仅在蚜虫被发现。在这研究，我们在中国在蚜虫的自然人口检测了并且描述Wolbachia感染。三超群(A，B和M)在检验蚜虫种类被发现。超群M是优势的，而超群A和B仅仅在某些种类被检测。超群N没在这研究被发现。也就是，有在蚜虫的Wolbachia的四个感染模式有超群M的感染独自一个，有超群A和M，有超群B和M的合作感染，和有超群A，B和M的合作感染的合作感染。仅仅有超群M的感染的模式是通用的并且在所有评估亚科被发现。仅仅二个亚科，Aphidinae和Lachninae，表明了介绍所有四个感染模式。三个模式在Calaphidinae被观察(M，A&M，B&M)并且Eriosomatinae(M，B&M，A&B&M)。二个模式在Anoeciinae被观察(M，A&M)并且Greenideinae(M，B&M)，并且一仅仅模式(M)在Aphidoidea的留下的家庭或亚科被观察。这些结果显示在中国蚜虫的Wolbachia感染是普遍的。种系发生的分析建议超群M在中国在蚜虫的所有主人种类之中很快并且最近散布了的那Wolbachia。为这传播和它的机制的原因在他们的蚜虫主人上与Wolbachia的可能的效果一起被讨论。

简介：ThispaperanalyzestheimpactsofurbanizationandunemploymentrateonChina’sdivorceratewiththepaneldataof31Chineseprovincesfrom2000to2011.Thestudymanifestsasfollows.First,thesignificantinfluenceofurbanizationcannotbeobservedontherisingbreakdownsincethelatterisnottheinevitableresultoftheformer.Inthesecondplace,unemploymentratehasasignificantnegativeinfluenceondivorcerate,namely,withtheformerincreasing,thelatterwilldecrease,whichechoestheperspectiveofdivorcecost.Andfinally,thispaperalsofindspositiveeffectsofpercapitafixedinvestment,old-agedependencyrate,averagehouseholdsize,theproportionoffloatingpopulationandpopulationdensity,andnegativecorrelationofaverageeducationattainmentondivorcerate.

简介：KARACHI:ThearmycommanderinthePakistanicityofKarachinarrowly^①escapedassassination^②yesterdaywhengunmenattackedhisconvoy^③withgunfireandabomb,killingatleast10andwoundinghisdriver,officialssaid.

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简介：AlinearizationattackontheKeyStreamGenerator(KSG)ofthemodifiedE0algorithmproposedbyHermelin[ProceedingsofICISC'99,SpringerLNCS1787,2000,17-29]isgiveninthispaper.TheinitialvaluecanberecoveredbyalinearizationattackwithO(260.52)operationsbysolvingaSystemofLinearEquations(SLE)withatmost220.538unknowns.FrederikArmknecht[CryptologyePrintArchive,2002/191]proposedalinearizationattackontheKSGofE0algorithmwith0(270.341)operationsbysolvinganSLEwithatmost224.056unknowns,sothemodificationproposedbyHermelinreducestheabilityofE0toresistthelinearizationattackbycomparingwiththeresultsofFrederikAnnknecht.

简介：Westudytheattackvulnerabilityofnetworkwithduplication-divergencemechanism.Numericalresultshaveshownthattheduplication-divergencenetworkwithlargerretentionprobabilityσismorerobustagainsttargetattackrelatively.Furthermore,duplication-divergencenetworkisbrokendownmorequicklythanitscounterpartBAnetworkundertargetattack.SuchresultisconsistentwiththefactofWWWandInternetnetworksundertargetattack.Soduplication-divergencemodelisamorerealisticoneforustoinvestigatethecharacteristicsoftheworldwidewebinfuture.Wealsoobservethattheexponentγofdegreedistributionandaveragedegreeareimportantparametersofnetworks,reflectingtheperformanceofnetworksundertargetattack.Ourresultsarehelpfultotheresearchonthesecurityofnetwork.

简介：AbstractHuman-elephant conflict (HEC) in India is becoming a growing health problem causing many fatalities every year. Elephants produce injuries by trampling, stomping, squeezing, tossing in the air, or crushing/targeting the head and chest commonly. The adult elephants are most aggressive in their mating season, leading to maximum incidences of HECs in this period. These attacks are mostly unprovoked, though most HECs are provoked. In this case series, the authors described the injuries sustained by three survivors in a short span of one month due to the sudden and unprovoked elephant attack. All the injuries were mild to moderate in severity and involved the chest in common. Timely rescue and prompt initiation of treatment were pivotal in their survival. The authors also want to create awareness about the mating season of elephants to minimize these unfortunate events in the future.

简介：「ButterflyCaught」是MassiveAttack乐队新专辑「100thWindow」的第二首单曲，在这部MV中，我们看到一只飞蛾栖息在歌手的身边，鼓动着羽翼，渐渐的，飞蛾和歌手的脸融为一体，歌手的脸慢慢转变成飞蛾的纹理……

简介：最新的一项研究表明那些乘坐交通工具上下班的人们，无论是自驾车，骑自行车还是坐公交车，他们在乘坐交通工具一个小时后患心脏病的几率提高了两倍。科学家们对此做出了不同的解释。

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简介：AbstractIntraamniotic infection (IAI) or chorioamnionitis is a common cause of preterm birth and may cause adverse neonatal outcomes, including neonatal pneumonia, respiratory distress, meningitis, sepsis, and death. Maternal morbidities from intraamniotic infection include dysfunctional labor requiring increased intervention, cesarean birth, postpartum uterine atony with hemorrhage, endometritis, peritonitis, sepsis, adult respiratory distress syndrome and, rarely, death. Chorioamnionitis can result from an ascending infection, iatrogenic causes or transplacental passage from maternal blood-borne infections. The clinical findings of chorioamnionitis include maternal fever (≥38 °C), maternal (>100 beats per minute) and/or fetal tachycardia (>160 beats per minute), maternal leukocytosis on complete blood count (>15 000 cells/mm3), and uterine tenderness and/or purulent and/or foul-smelling amniotic fluid. The management of chorioamnionitis mainly includes antibiotic therapy and delivery. Women with previable preterm premature rupture of membranes should be offered realistic counseling from a multidisciplinary approach. The separation of the mother and the fetus to preserve the life of the mother should prioritize delivery methods that result in a living fetus if possible, with appropriate neonatal resuscitation available.

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简介：Experimentalstudywasconductedforboundary-layersonasharp5°half-angleconeof400mmlengthatanglesofattack.ThemodelwastestedintheT-326hypersonicwindtunnel(ITAM)atfreestreamMachnumberM=5.95.Meanandfluctuationwallcharacteristicsoftheboundarylayeraremeasuredat0°2°3°and4°anglesofattackfordifferentstagnationpressures.PulsationmeasurementsarecarriedoutbymeansofALTPsensor.Pressureandtemperaturedistributionsalongthemodelareobtained,andtransitionbeginningandendlocationshavebeenfound.Boundarylayerstabilizationwiththeincreaseofangleofattackandthedecreaseofstagnationpressureisobserved.Highfrequencypulsationsinherenttohypersonicboundarylayer(secondmode)havebeendetected.

简介：AbstractLeopard attacks on humans are reported most often from the Indian subcontinent. The bite wounds are complex injuries infected with polymicrobial inoculum and may present as punctures, abrasions, lacerations or avulsions. The presentation and acceptable treatment of these injuries vary according to the wound. We hereby describe the clinical presentation and treatment of a male victim with leopard bite injuries on the head and neck region. As bite injuries are commonly found on and around the face, maxillofacial surgeons should be familiar with the therapy. Through thorough clinical and radiological examination, it is essential to prevent missing any hidden injuries, which can easily turn lethal. To benefit the rural population, more health facilities need to be established in remote areas.