999 resultados para Espagne (1500-1600)


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The habit of "drinking smoke" , meaning tobacco smoking, caused a true controversy in early modern England. The new substance was used both for its alleged therapeutic properties as well as its narcotic effects. The dispute over tobacco continues the line of written controversies which were an important means of communication in the sixteenth and seventeenth century Europe. The tobacco controversy is special among medical controversies because the recreational use of tobacco soon spread and outweighed its medicinal use, ultimately causing a social and cultural crisis in England. This study examines how language is used in polemic discourse and argumentation. The material consists of medical texts arguing for and against tobacco in early modern England. The texts were compiled into an electronic corpus of tobacco texts (1577 1670) representing different genres and styles of writing. With the help of the corpus, the tobacco controversy is described and analyzed in the context of early modern medicine. A variety of methods suitable for the study of conflict discourse were used to assess internal and external text variation. The linguistic features examined include personal pronouns, intertextuality, structural components, and statistically derived keywords. A common thread in the work is persuasive language use manifested, for example, in the form of emotive adjectives and the generic use of pronouns; the latter is especially pronounced in the dichotomy between us and them. Controversies have not been studied in this manner before but the methods applied have supplemented each other and proven their suitability in the study of conflictive discourse. These methods can also be applied to present-day materials.

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This study is a pragmatic description of the evolution of the genre of English witchcraft pamphlets from the mid-sixteenth century to the end of the seventeenth century. Witchcraft pamphlets were produced for a new kind of readership semi-literate, uneducated masses and the central hypothesis of this study is that publishing for the masses entailed rethinking the ways of writing and printing texts. Analysis of the use of typographical variation and illustrations indicates how printers and publishers catered to the tastes and expectations of this new audience. Analysis of the language of witchcraft pamphlets shows how pamphlet writers took into account the new readership by transforming formal written source materials trial proceedings into more immediate ways of writing. The material for this study comes from the Corpus of Early Modern English Witchcraft Pamphlets, which has been compiled by the author. The multidisciplinary analysis incorporates both visual and linguistic aspects of the texts, with methodologies and theoretical insights adopted eclectically from historical pragmatics, genre studies, book history, corpus linguistics, systemic functional linguistics and cognitive psychology. The findings are anchored in the socio-historical context of early modern publishing, reading, literacy and witchcraft beliefs. The study shows not only how consideration of a new audience by both authors and printers influenced the development of a genre, but also the value of combining visual and linguistic features in pragmatic analyses of texts.

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We report here the development of ultrafine grained ZrB2-SiC composites using TiSi2 as the sintering aid and spark plasma sintering (SPS) as the processing technique. It was observed that the presence of TiSi2 improved the sinterability of the composites, such that near theoretical densification (99.9%) could be achieved for ZrB2-18 wt.% SiC-5 wt.% TiSi2 composites after SPS at 1600 degrees C for 10 min at 50 MPa. Use of innovative multi stage sintering (MSS) route, which involved holding the samples at lower (intermediate) temperatures for some time before holding at the final temperature, while keeping the net holding time to 10 min, allowed attainment of full densification of ZrB2-18 wt.% SiC-2.5 wt.% TiSi2 at a still lower final temperature of 1500 degrees C at 30 MPa. TEM observations, which revealed the presence of anisotropic ZrB2 grains with faceted grain boundaries and TiSi2 at the intergranular regions, suggested the occurrence of liquid phase sintering in the presence of TiSi2. No additional phase was detected in XRD as well as TEM, which confirmed the absence of any sintering reaction. The as developed composites possessed an excellent combination of Vickers hardness and indentation toughness, both of which increased with increase in TiSi2 content, such that the ZrBi2-18 wt.% SiC-5 wt.% TiSi2 (SPS processed at 1600 degrees C) possessed hardness of similar to 20 GPa and indentation toughness of similar to 5 MPa m(1/2). The use of MSS SPS at 1500 degrees C for ZrBi2-18 wt.% SiC-2.5 wt.% TiSi2 composite resulted in improvement in hardness of up to similar to 27 GPa and attainment of high flexural strength of similar to 455 MPa. (C) 2011 Elsevier B.V. All rights reserved.

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The hot deformation behavior of Nb-1 wt.%Zr alloy was studied using uniaxial compression tests carried out in vacuum to a true strain of 0.6 in the temperature range of 900 to 1700 degrees C and the strain rate range of 3 x 10(-3) to 10 s(-1). The optimum regime of hot workability of Nb-1Zr alloy was determined from the strain rate sensitivity (m) contour plots. A high m of about 02 was obtained in the temperature and strain rate range of 1200-1500 degrees C and 10(-3) to 10(-1) s(-1) and 1600-1700 degrees C and 10(-1) to 1 s(-1). Microstructure of the deformed samples showed features of dynamic recrystallization within the high strain rate sensitivity domain. Compared to the study on Nb-1Zr-0.1C alloy, Nb-1Zr showed a lower flow stress and an optimum hot working domain at lower temperatures. In the 1500 to 1700 degrees C range the apparent activation energy of deformation for Nb-1Zr was 259 kJ mol(-1), the stress exponent 5, and the activation volume about 200 to 700 b(3). (C) 2015 Elsevier Ltd. All rights reserved.

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Esta obra saiu nas Memórias da comissão portuguesa para comemorar o centenário do descobrimento da América. Traz em apêncide a Relação análoga de Lunardo Cha Masser e dois documentos de Cantino e Pasqualigo. Contém, ainda, a primeira notícia impressa sobre o descobrimento do Brasil em carta ao Rei da Espanha.

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Charged pion pair photoproduction has been investigated up to a gamma energy of 1500 MeV, using the Caltech 12-inch heavy liquid bubble chamber with a small diameter, high intensity photon beam passing through a central beam tube gaseous hydrogen target surrounded by the sensitive Freon. Scanning, analysis, and data reduction techniques have been developed to deal with the problems of two-vie stereo, hidden event origins, absence of magnetic field, and the range-energy and multiple scattering relationships that occur in the heavy materials. Roughly 5700 pictures have been scanned and analyzed, yielding 754 acceptable events. Cross section and parameter distributions are generally consistent with the results of previous experiments. A statistically insignificant “bump” was observed in the dipion mass spectrum in the region of 500 MeV, the disputed σ meson mass. This region was investigated as carefully as the limited statistics would allow; dipion angular distributions are consistent with isotropy, and there is indication that some of the events in this region might come from decay of an intermediate N*11 (1425) into a proton and dipion.

Photographic materials on pp. 18, 20, 22, and 24 are essential and will not reproduce clearly on Xerox copies. Photographic copies should be ordered.

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The reaction γ + p p + π+ + π- has been studied for photon energies between 800 and 1500 MeV and for dipion masses between 510 and 900 MeV. The bremsstrahlung beam from the Caltech synchrotron was passed through a liquid hydrogen target and spark chambers were used to detect the three final particles. In addition, the proton energy was determined by a range measurement. Approximately 40,000 photographs were taken, yielding 3018 acceptable events. The results were fit to an incoherent combination of the N*(1238) resonance, the po (750) resonance, and three-body phase space, with various models being tried for po production. The total cross section for po production is consistent with previous experiments. However, the angular dependence of the cross section is slightly more peaked in the forward direction, and the ratio of po production to phase space production is larger than previously observed.

However, since this experiment was only sensitive to the production angles cos θ cm ≥ .75, statistical fluctuations and/or an anisotropic distribution of background production have a severe influence on the po to background ratio. Of the po models tested, the results prefer po production by the one pion exchange mechanism with a very steep form factor dependence. The values of the mass and width of the po found here are consistent with previous experiments.

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Investigación realizada dentro del Programa de Formación y Perfeccionamiento de Personal Investigador del Gobierno Vasco (2010-2013).

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A partir de abril de 1500 a armada de Pedro Álvares Cabral dá início ao contato e ao registro através das páginas da carta de seu escrivão, Pero Vaz de Caminha de um novo mundo e uma nova humanidade: os índios que habitavam o território que atualmente conhecemos por Brasil. No desenrolar dos quinhentos, estes diferentes povos e culturas foram decodificados e reinterpretados de diversas maneiras em cartas, livros e demais documentos manuscritos. No campo das artes visuais portuguesas, não foi diferente. Esse outro assume um papel coadjuvante quase sempre inserido em duas temáticas principais, a arte religiosa e as grandes navegações mas nem por isso menos interessante: o gosto pelo exótico, característica marcante durante o período das expansões ultramarinas, não só em Portugal, mas em outras regiões europeias, aliado ao etnocentrismo e a influência do Cristianismo, acabou por caracterizar os índios do Brasil, mutatis mutandis, como novos homens selvagens. Para uns, são como bestas, mais perto do inferno; para outros, são cristãos em potencial, mais próximos do céu

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EXTRACT (SEE PDF FOR FULL ABSTRACT): Tree-ring chronologies, developed from cores from Pinyon pines growing on climatically sensitive sites in the north-central Great Basin, have been used to reconstruct precipitation and drought histories of the area from A.D. 1600 to 1982. Analysis of these hydrologic time series helps to place current climatic conditions into the perspective of the past 383 years (since 1600). ... The years 1934 and 1959 were the first and fourth driest while 1934 had the lowest July Palmer Drought Severity Index (PDSI) of the reconstructed records. Nevertheless, the decade of the 1930's is only the seventh driest since 1600; the decade 1953-1962 ranks as the second driest. The driest non-overlapping decade since 1600 was 1856-1865. Interestingly, the second wettest decade was 1932-1941. An examination of 30-year mean precipitation data shows that the driest 30-year period was 1871-1900; 1931-1960 ranks as the fourth driest. The current 30-year period (1951-1980) ranks twelfth.

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EXTRACT (SEE PDF FOR FULL ABSTRACT): Chemical isolation of lattice-bound trace elements in marine carbonates has opened new windows to paleoceanographic study. In a modern context at the Galapagos Islands, oceanic upwelling variability is mirrored by changes in the Cd content of reef-building corals. This association derives from cadmium's nutrient-like distribution in the water column and its ability to substitute for calcium in the aragonite lattice of corals. Given corals of sufficient age, it is thus possible to reconstruct near-term ENSO-related changes in surface waters of the eastern Equatorial Pacific on annual and sub-annual timescales.

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本文主要通过大量的植物群落学调查和植被、环境状况的数量分析,分别从植物区系、森林群落及其主要木本物种、干扰和物种多样性五个方面分析了三峡大老岭地区山地植被景观的空间格局及其与环境因子的关系,结果表明: 1) 植物区系:科的分布区类型以热带性质为主;属一级温带性质明显,北温带、东亚和泛热带诸分布类型突出;区系上属于华中植物区系地区的东部。 2) 在垂直梯度上:种子植物属热带分布诸类的比例自海拔400至800米(~1100米)之间呈上升趋势,然后下降;温带分布的第8、9、10、11类随海拔而上升;地中海-中亚中心分布的第12、13类只见于比较干热的河谷地带;东亚分布和中国特有属在海拔900~1100m和1600~1800m段取得小的峰值;世界分布属的比例随海拔而上升,蕨类植物属则相反。 分别用种子植物属的分布型比列构成,和全部521个属的种类数量,对15个海拔段作聚类分析:前者首先反应了海拔1100~1200m处的划分,与植被干扰状况的垂直分布差异一致;后者强调了海拔900/1000m和1800/1900m 处的分异,可能反映了地带性常绿阔叶林基带/常绿落叶阔叶混交林带,和常绿落叶阔叶林带/落叶阔叶林带的分异。 3) 对本地区森林植被的数量分类结果表明:基本上可以分为中低海拔次生落叶 针阔混交林和中高海拔山地常绿落叶阔混交林两大群。第一群主要包括栓皮栎林-杉木林-马尾松林组(低海拔段)和短柄抱栎林-锥栗林组(中低海拔段)。第二群包括中低海拔沟谷常绿阔叶林组、中海拔段常绿落叶阔叶混交林组和高海拔段米心水青冈林-茅栗林组。 DCCA排序区分了11个群落类型或群落组。采用的7个地貌因子变量中效果显著的可归纳为三组:①海拔,主要反映热量和降水梯度;②坡度和坡位,可能主要反映土壤厚度及其水分和养分状况;③坡向及坡位,反映光照条件。其中植被格局的海拔梯度效应最显著。沿海拔梯度分段分析上述诸因子对植被格局差异影响的垂直分布,表明海拔因子的局部效应在海拔600-800m和1500-1700m段最显著;坡向的效应在海拔1600m以上最突出;坡面、坡位、坡形、坡度等因子的作用在海拔中部最大。对植被格局影响因子的贡献进行定量分离,表明地形对对大老岭森林格局具有强烈的控制作用。 4) 对大老岭森林植被275个主要的木本种类进行TWINSPAN分类,得到16个种组;DCCA排序结果将上述16组合并为8群,两方面都主要反映了沿海拔和坡位+坡向的分化;海拔中部的局部地形差异导致物种组的分化比两端更细致和强烈。 根据物种生活型及其在植物群落中的地位,分6个种组进行排序和环境解释,表明:①尽管低海拔地段受到强烈人为干扰,常绿种类仍显示了数量和性质沿海拔梯度的变化;②珍稀物种在海拔梯度上形成两个相对集中的区段,大致对应于山地常绿落叶阔叶混交林带的上下边缘;③先锋树种在中低海拔的中上坡位富集;④在中、高海拔的中低坡位,落叶的乔木伴生种显示了极大的多样性;⑤为数不多的针叶树种在海拔和局部地形梯度上也有明确分异;⑥它们和落叶的栎(Quercus)、栗(Castanea)、水青冈(Fagus)、鹅耳枥(Carpinus)属物种在大老岭地区不同地形部位的植被中起着主要的建群作用。 具体统计海拔梯度上,常绿和落叶的乔、灌木4类物种分布的种数变化表明:海拔1100m以下人为活动干扰与木本物种多样性呈一致的负相关;海拔1100m以上常绿种减少与与落叶种的增加形成对照;1100~1700m之间是落叶乔木种最丰富的地段,海拔1700m以上四类物种数量急剧下降,与山顶脊附近生境多样性降低、植物群落类型趋同有关。另外,典型亚热带的棕榈和蕉只见于海拔1000m以下;针叶树种以海拔1150m左右为界分成两组。前述4类物种的分布边界在海拔850~1050m和海拔1650~1750m之间形成比较明显的峰值,基本对应着山地常绿落叶阔叶混交林带的上下边缘。 根据海拔分布范围,将样方中出现的558种木本植物按常绿乔/灌种和落叶乔/灌种分别分成5个热量生态类群。统计各自的面分比表明:a. 落叶灌木种的多样性分布重心在海拔梯度上的位置比落叶乔木种高,常绿种则相反,因此灌木和类的分布特征能更好的反映次生环境中的植被-气候关系;b. 在海拔850~1850m的木本物种形成巨大的多样性,仅出现于这一段的物种也很可观;亲缘物种的分化和替代突出,反映其对生物多样性发生和维持的意义重大;c. 亚热带中山地带对落叶种生物多样性的意义远大于常绿种。 5)统计全部群落样方内枯立木、倒伏木、断头木和伐桩四类受干扰木的大小、数量、物种以反映地形对干扰的影响:①枯立木以2~15cm径级个体为主,小径级的树种选择性不强,主要分布在山南坡口上坡位,海拔1800m以上尤多,在陡峭的坡地中部减少;其大径级个体的物种构成和分布格局反映了与生境干旱有关干扰的存在。②倒伏木主要分布在海拔1200~1800m之间坡面中部和顶脊两侧,发生频率与坡度成正比;坡地中部以中、小径级阳性树种为主,山坡顶脊两侧的倒伏木则多为大径级的群落优势种。③断头木主要分布在海拔1200~1700m,和海拔1900m以上。小径级的断头木分布格局接近于枯立木,较大径级的断头木则多与倒伏木的分布相关,断头木中少有典型的阳性树种,主要由林下荫耐种构成。④人为砍伐的伐桩主要为中大径级的植被建群种或优势种个体,在海拔1000m以下,1100-1200m和1600-1800m形成三个峰值,其分布主要与人口密度、生产方式、林木种类以及交通运输便捷程度有关,通常沟谷和山脊线上的伐桩密度较大。大老岭地区人为干扰主要反映在海拔1100m以下,自然干扰的格局在海拔1100m以上才得到反映。 6)在不同取样尺度上,对大老岭地区森林群落各层次α多样性和β多样性的空间格局分析表明:i. 乔木层α多样性在海拔1200-1800m之间取值较高,灌木、草本层α多样性的垂直梯度不显著,但在海拔1200-1800m之间的波动变化较为剧烈,南坡面有最丰富的灌木层多样性而西坡乔木层的物种最丰;从植被整体上,海拔1000m以下物种丰富度较低,1000-1700m之间变化剧烈,1700m以上丰富度水平较高。ii. 海拔1000-2000m之间94个样方中,乔、灌、草三层多种生物多样性指数变化影响因子的大小顺序是:坡位>海拔>坡向>坡面>坡度>坡形。乔、灌、草各层几种多样性指数在多维的地形因子梯度上形成各异的分布格局,反映了山地物种多样性格局控制因子的多样性和多尺度,及局部地形因子对景观尺度上生物多样性空间格局的强烈影响。iii.对海拔1050m和1670m处植被α多样性的变尺度分析表明:随取样尺度增大,低海拔乔木、灌木层α多样性增长速率比高海拔大;后者草本层的多样性增长比较快。海拔1050m处群落各层的α多样性在800m~2尺度上渐近稳定;海拔1670m处,400m~2尺度上各层α多样性指数已基本稳定。 南、北、西坡面β多样性沿海拔梯度大致减少,在海拔1600m以上更明显,在海拔梯度中部变化剧烈。反映不同坡面上群落间异质性水平是:西坡>北坡>南坡。 在对植被、环境上述各个方面的格局特征分析基础上,对三峡地区侵入岩山地类型建立了一个综合的植被景观格局模式。 文章最后就两个景观尺度植被-环境的综合性问题进行了讨论:1)气候、植物区系、植被和物种分布等对老岭以至于三峡地区和亚热带山地常绿落叶阔叶混交林带的位置、宽度的反映;和气候、地形、干扰等因子对这一生态过渡带格局和动态的影响;2)三峡地区生物多样性垂直分布的特征、维持和变化的现代机制,以及保护的重点和策略

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EXTRACT (SEE PDF FOR FULL ABSTRACT): A varve chronology with annual resolution (AD 1117-1992) has been developed recently for Santa Barbara Basin. Varve thickness and water content show an exponential trend consistent with expected patterns in the presence of sediment compaction over time. Annual varve thickness was decomposed into orthogonal components using singular spectrum analysis (SSA) to identify and retrieve inter-decadal oscillations. ... This suggests a connection with global-scale decadal cycles identified in the subtropical Pacific gyre circulation and, possibly, with solar-driven phenomena. The near-1600 AD event coincides with (a) a similarly sudden change of state in nearby Santa Monica Basin that triggered the onset of anoxic conditions and the preservation of laminated sediments, (b) an extreme drought over the American Southwest, (c) a transformation of the age structure in a number of forest populations throughout Arizona and New Mexico. Total organic carbon burial flux in Santa Barbara Basin varves also shows a marked change after AD 1600. A possible climatic link is proposed that involves pathways for moisture transport in the Southwest at decadal and longer time scales.