简介:OneofIUGS'spastSecretary-Generals,theDutchmanSimonvanderHeide(SvdH)isstillingoodphysicalshapeandenjoysanexcellentmemory.Ivisitedhimon17November2003andonJanuary5th2004inhisnicehouseintheoutskirtsofthecityofHaarlem,theNetherlands.Hewasbornin1913and,despiteofhisadvancedageof90yearsnow,hetravelstoAustraliaeveryyeartovisithisdaughter.
简介:华盛顿·欧文创作的短篇小说RipVanWinkle曾被誉为美国早期文学的精品。作者在刻画与主人公Rip相对的女性人物DameVanWinkle的形象时,则使用消极的、侮辱性的、极端偏见的言辞,把她列入不足挂齿的“妇道人家”,甚至贬低为“泼妇”、“悍妇”、“妖妇”。如今重读这篇经典我们发现:小说的男主人公Rip是个十足的懒汉懦夫、现实生活的逃避者和时代的落伍者,而他的妻子DameVanWinkle则是一个含辛茹苦的善良母亲、一个兢兢业业的持家能手、一个敢于向男权社会怒吼和呐喊的伟大女性,同时也是父权社会的牺牲品和受害者。她的唠叨和抱怨,实际上是对女性艰难生活和不公命运的合理申诉,也是对性别歧视的严正宣战,更是对妇女自由、平等、尊严、幸福的正义呐喊,应该引起男人的理解、女人的同情以及社会的重视和关注。
简介:Ramanspectroscopyisaversatiletoolwidelyusedforcomprehensiveprobingofcrystalinformation.However,generallywhenappliedinnarrow-band-gapvanderWaalscrystals,itisliabletoforma'bug,'especiallyintransition-metal-dichalcogenides(TMDs).Thatis,severalresonantRaman-scattering(RS)modeswillinevitablyappearintheRamanspectrawithstrongintensity,interferingwiththedesiredsignalofoptical-phononmodes.Here,weproposecross-sectionalpolarizedRamanscatteringcapableofregulatingtheintensityofRSmodesinaccordancewithquasi-sinusoidalrules.Typically,forMoS2andWS2,whenthepolarizationvectorofexcitedlightisalongthecaxisofthecrystal,allRSmodesarenearlycompletely'expunged'fromtheRamanspectra.ThemechanismisthattheabsorptionofmostTMDswithaspacegroupofR3mforthelightpolarizedalongthecaxisisinfinitesimal,thusformingasmallcouplingintensityofelectronicstatesexcitedopticallyandacoustic-phononmodesatpointM,whichinturnrestraintheappearanceofRSmodes.TheregulatingstrategyproposedcanbeappliedtoothervanderWaalscrystalssoastoobtainahighsignal-to-noiseratioRamanspectrum.
简介:摘要本文报道1例Van Neck-Odelberg病。患儿男,11岁。骨盆平片示右侧坐骨耻骨连接处局部膨隆,周围见硬化边。CT平扫示骨质不连续,T1WI呈低信号,T2WI呈高信号,DWI示病变内水分子扩散受限。超声表现为病灶似骨皮质回声,内无彩色血流信号。患儿经保守治疗后症状消失。
简介:摘要Van Maldergem综合征由编码原钙黏蛋白家族的成员DCHS1或FAT4的基因突变引起,是一种罕见的以生长迟缓、智力发育障碍、颅面畸形以及四肢和骨骼发育不良为特点的常染色体隐性遗传性疾病,诊断主要依靠临床表现及影像学特征。目前对于Van Maldergem综合征的报道较少,对此病的认识尚存不足。作者对该综合征的临床特征、诊断及鉴别诊断、分子遗传学及治疗等方面进行了综述,以提高对该疾病的认知。
简介:Westudiedtheresponseoffractional-ordervandePoloscillatortoGaussianwhitenoiseexcitationinthisletter.Anequivalentintegral-ordernonlinearstochasticsystemisobtainedtoreplacethegivensystembasedontheprincipleofminimummean-squareerror.Throughstochasticaveraging,anaveragedItoequationisdeduced.WeobtainedtheFokker–Planck–KolmogorovequationconnectedtotheaveragedItoequationandsolvedittoyieldtheapproximatestationaryresponseofthesystem.TheanalyticalsolutionisconfirmedbyusingMonteCarlosimulation.
简介:TheOctober23,2011M7.2Tabanli-VanandNovember9,2011M5.2Edremit–VanearthquakescauseddamageinawidespreadareaacrosstheVanprovinceinTurkey.Thegroundmotions,thedamagecausedbytheseearthquakesandtherecentprogressrelatedtorecoveryeffortsarepresentedherein.First,thekeypropertiesoftherecordedstronggroundmotionslikespectralamplitudesanddirectionalityareevaluated.Theobserveddamageintheaffectedreinforcedconcreteandmasonrystructuresarediscussed.Thesetofcommonstructuraldamagemechanisms(i.e.,softstoryfailure,torsionalresponseduetoplanirregularity,shortcolumnfailure,pulloutfailure,pounding)observedinthedamagedbuildingswereidentified.Therelationshipbetweenthekeystructuralpropertiesandtheextentofdamageisinvestigated.Theprimarylossdriversacrosstheregionwereidentifiedtobethepoorqualityofworkmanshipandimproperuseofbuildingmaterials.Theresultsfromtheinvestigationsuggestthatalargeportionofthelosscouldhavebeenpreventedifsufficientattentionandcareweregiventotheimplementationofthedesignregulationsandinparticulartotheconstructionpractice.Lastly,therecentprogressintheongoingrebuildingactivitiesispresented.
简介:摘要回顾首都儿科研究所附属儿童医院2019年收治的1例儿童Van Wyk-Grumbach综合征患儿的临床资料。患儿女性、7岁,以身材矮小(<-2 s)、肥胖、乳腺增大为主要临床表现,检测血促甲状腺激素(TSH)>100 mIU/L、 游离甲状腺素(FT4)5.15 pmmol/L、雌二醇与催乳素水平增高,促性腺激素激发试验提示为外周性性早熟,卵巢巨大囊肿、垂体增生,骨龄明显落后,贫血、血脂水平增高,心包积液,诊断为Van Wyk-Grumbach综合征。行左甲状腺素钠替代治疗,剂量从25 μg/d逐渐增至75 μg/d。治疗后出现阴道出血3 d,治疗3个月时甲状腺功能基本正常,卵巢囊肿明显缩小,心包积液吸收,继续治疗并根据甲状腺功能检查结果左甲状腺素剂量减至50 μg/d,治疗1年时甲状腺功能基本正常,未再出现阴道出血,卵巢、垂体大小恢复正常。
简介:摘要回顾首都儿科研究所附属儿童医院2019年收治的1例儿童Van Wyk-Grumbach综合征患儿的临床资料。患儿女性、7岁,以身材矮小(<-2 s)、肥胖、乳腺增大为主要临床表现,检测血促甲状腺激素(TSH)>100 mIU/L、 游离甲状腺素(FT4)5.15 pmmol/L、雌二醇与催乳素水平增高,促性腺激素激发试验提示为外周性性早熟,卵巢巨大囊肿、垂体增生,骨龄明显落后,贫血、血脂水平增高,心包积液,诊断为Van Wyk-Grumbach综合征。行左甲状腺素钠替代治疗,剂量从25 μg/d逐渐增至75 μg/d。治疗后出现阴道出血3 d,治疗3个月时甲状腺功能基本正常,卵巢囊肿明显缩小,心包积液吸收,继续治疗并根据甲状腺功能检查结果左甲状腺素剂量减至50 μg/d,治疗1年时甲状腺功能基本正常,未再出现阴道出血,卵巢、垂体大小恢复正常。