993 resultados para 198-1213A
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Samples of chert, porcellanite, and chalk/limestone from Cretaceous chert-bearing sections recovered during Leg 198 were studied to elucidate the nature and origin of chert color zonations with depth/age. Sedimentary structures, trace fossils, compactional features, sediment composition, texture, geochemistry, and diagenetic history were compared among lithologies. Trends in major and minor element composition were determined. Whereas geochemical analyses demonstrate systematic elemental differences among the different lithologies, there are less distinct patterns in composition for the colored cherts. The color of the chert appears to be related primarily to the amount of silica and secondarily to the proportion of other components. Red cherts are almost pure silica with only minor impurities. This may allow pigmentation from fine Fe oxides to dominate the color. These red cherts are from places where geophysical logs indicate that chert is the dominant rock type of the section. These red chert intervals cannot be unequivocally distinguished from surrounding chert-bearing lithologies in terms of sedimentary structures.
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In this study of volcanic ash retrieved from Shatsky Rise during Ocean Drilling Program Leg 198, the texture and composition of the volcanic components (glass and crystals) were used to fingerprint ash layers for detailed correlation. Correlations among ash layers in holes drilled at the same site as well as between sites, including sites on different parts (highs) of the rise, were tested. Although high-to-high correlations failed, intrahigh correlations were more successful. Our data suggest a significantly different source for some pyroclastic debris, especially at Site 1208, possibly associated with pumice rafts carried northward from the Izu-Bonin arc by the Kuroshio Current. Other ashes are consistent with rhyolitic to dacitic air fall ash from Asian arc volcanoes. We were not able to texturally distinguish between air fall ash and pumice-raft fallout but suspect that the latter is associated with higher percentages of vesiculated ash components, as we demonstrate occur in more proximal Izu-Bonin pyroclastic deposits.
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Genetic analysis of diffusion tensor images (DTI) shows great promise in revealing specific genetic variants that affect brain integrity and connectivity. Most genetic studies of DTI analyze voxel-based diffusivity indices in the image space (such as 3D maps of fractional anisotropy) and overlook tract geometry. Here we propose an automated workflow to cluster fibers using a white matter probabilistic atlas and perform genetic analysis on the shape characteristics of fiber tracts. We apply our approach to large study of 4-Tesla high angular resolution diffusion imaging (HARDI) data from 198 healthy, young adult twins (age: 20-30). Illustrative results show heritability for the shapes of several major tracts, as color-coded maps.
Plan Krivorogskogo okruga Sofievskogo raĭona kolfonda Nº 198/15 63, ploshchadiʻ︠u︡ 272.0627 gektara
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Digital image
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Contenido: Razón y fe en Santo Tomás de Aquino / Gustavo Eloy Ponferrada – Sobre la verdad práctica en Tomás de Aquino / Joaquín García Huidobro – Supuestos cartesianos y gnoseología tomista / Augusto Furlán – Discusión de la visión del catolicismo en la obra de Hegel / Ignacio E. M. Andereggen – Ciencia, filosofía y religión : a propósito de una obra de H. Margenau / María Ángeles Vitoria – Sobre el alma y su cuerpo / Héctor Jorge Padrón – El bien común político y la filosofía política actual / Jorge Martínez Barrera – El sujeto de la psiquiatría / Mario Enrique Sacchi – Notas y comentarios – Crónicas -- Bibliografía
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Nome do autor na folha de rosto: Sidney A. Bittencourt.
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A Igreja faz uma avaliação da Assembleia Nacional Constituinte. Segundo a Conferência Nacional dos Bispos do Brasil (CNBB) houve muitos progressos sociais e é na questão da ordem econômica que estão os maiores conflitos. Em relação à família a Igreja defende o casamento indissolúvel, mas apresentou uma emenda pedindo que o Estado reconheça toda a união estável de casais. Dom Jayme Chemello diz que, sem a união estável, não há sequer a possibilidade da educação. O Presidente da ANC Ulysses Guimarães apresenta dados estatísticos sobre o trabalho da Constituinte. Os direitos dos cidadãos na nova Carta foram discutidos por estudantes e constituintes na Universidade de Brasília (UNB). João Gilberto, ex-Deputado e Presidente do Centro de Acompanhamento da Constituinte, avalia que o projeto começa bem, privilegiando os direitos individuais, sociais, coletivos e políticos dos cidadãos. Lysâneas Maciel (PDT-RJ) defende a proposta de realização de um plebiscito popular para sancionar a Constituição, prevendo ainda que, caso a nova Carta não seja aprovada pela população, os constituintes perderão suas funções. Quatro constituintes foram verificar denúncia de mortes por causa de disputa de terras na região do Bico do Papagaio, no sul do Pará. Raquel Capiberibe (PMDB-AP) considera estarrecedora a realidade encontrada na região, caracterizada pela violência dos próprios órgãos de governo, da própria polícia. Ademir Andrade (PMDB-PA) diz que apoia a emenda popular em favor de uma reforma agrária, para evitar a continuação da violência no país.