983 resultados para St. Lawrence
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[From Jasper Cropsey Sketch book, 1855-1856]
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Mode of access: Internet.
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En tête du titre: Prize essay.
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"The tract upon which the study was made is owned and operated by F.A. cutting of Boston, Mass. It comprises 8,000 acres of the northeast quarter of Riversdale township in St. Lawrence county."--L. 1.
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Vol. 1 has added t.-p., engr.
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"January 1997."
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Caption title: Letter, &c. To the electors of St. Lawrence and Franklin Counties, New-York.
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Mode of access: Internet.
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The phylogenetic relationships and historical biogeography of 10 currently described rainforest skinks in the genus Saproscincus were investigated using mitochondrial protein-coding ND4 and ribosomal RNA 16S genes. A robust phylogeny is inferred using both maximum likelihood and Bayesian analysis, with all inter-specific nodes strongly supported when datasets are combined. The phylogeny supports the recognition of two major lineages (northern and southern), each of which comprises two divergent clades. Both northern and southern lineages have comparably divergent representatives in mid-east Queensland (MEQ), providing further molecular evidence for the importance of two major biogeographic breaks, the St. Lawrence gap and Burdekin gap separating MEQ from southern and northern counterparts respectively. Vicariance associated with the fragmentation and contraction of temperate rainforest during the mid-late Miocene epoch underpins the deep divergence between morphologically conservative lineages in at least three instances. In contrast, one species, Saproseincus oriarus, shows very low sequence divergence but distinct morphological and ecological differentiation from its allopatric sister clade within Saproseincus mustelinus. These results suggest that while vicariance has played a prominent role in diversification and historical biogeography of Saproscincus, divergent selection may also be important. (C) 2004 Elsevier Inc. All rights reserved.
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Essa dissertação se propôs a analisar o entendimento do conceito de juventude, ou melhor, juventudes, nos dias de hoje. Junto a essa busca, nos deparamos com o surgimento das polÃticas públicas voltadas para essa parte da sociedade, finalmente entendida como uma população complexa, plural, capaz e desejosa de ser protagonista da própria história. Num olhar mais cuidadoso, questionamos como se caracteriza a pluralidade da juventude da cidade de São Lourenço (MG). Uma polÃtica municipal para jovens pode atender tal pluralidade? A construção de uma polÃtica municipal para jovens é apropriada à pluralidade da juventude? Para esta pesquisa, entendemos que a metodologia de estudo de caso, com caráter exploratório, assim como a pesquisa autobiográfica seriam as mais adequadas para uma compreensão complexa e profunda dessa realidade. A base teórico-conceitual foi escolhida a partir dos estudos mais recentes relativos à juventude. Teóricos como Castro e Aquino estão bem presentes neste trabalho, assim como Sposito, Abramo, Pais e MarÃas, no primeiro capÃtulo. No segundo capÃtulo, além da consistente contribuição de Ninis e Giolito, recorreu-se a autores, documentos locais e publicações eletrônicas, bem como a própria vivência da autora na cidade. No terceiro capÃtulo, a trajetória pessoal da autora, seu trabalho como funcionária da Prefeitura Municipal e a dissertação de mestrado se encontram. Como mostrou Gilberto Velho, memória, projeto e identidade são significativos na vida pessoal e na possibilidade da transformação social.(AU)
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Continental margin sediments off Nova Scotia accumulate at high rates (up to 360 cm/kyr) and contain a history of millennial-scale environmental changes which are dominated by the proximity of the Laurentide ice sheet during the latest Quaternary. Using stable isotope ratios of oxygen, accelerator mass spectrometer radiocarbon dating, micropaleontology, and sedimentology, we document these changes in six piston cores ranging in water depth from ab. 450 to ab. 4300 m. We find that maximum d18O in N. pachyderma occurred about 15 ka and preceded the maximum abundance of this species in these cores by ab. 1000 years. Between 13 and 14 ka we find a second peak in abundance of N. pachyderma, minimum d18O, and two pulses of ice rafting. The sediment lithology supports terrestrial studies which indicate that there was a general withdrawal of ice beyond the upper Paleozoic and Mesozoic red beds by 14 ka in southeastern Canada, so the ice rafting events between 13 and 14 ka probably reflect ice stream activity in the St. Lawrence valley. The Younger Dryas event is recognized as a peak in abundance of N. pachyderma and ice rafting (dated as ab. 11.3 ka), but meltwater discharge to the Gulf of St. Lawrence was either too small or occurred over too long a time to leave a distinct d18O minimum off Nova Scotia. At 7.1 ka, in the middle of Holocene warming, we find a third peak in abundance of N. pachyderma and another d18O minimum but no ice rafting. We interpret these data as evidence of a late-occurring meltwater event which, if correct, could have originated in the Great Lakes, in the Labrador-Ungava region, or in both. The final millennial-scale phenomenon off Nova Scotia is the onset of "Neoglaciation," marked by increased ice rafting and increased % N. pachyderma beginning about 5 kyr ago.
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A compilation of basal dates of peatland initiation across the northern high latitudes, associated metadata including location, age, raw and calibrated radiocarbon ages, and associated references. Includes previously published datasets from sources below as well as 365 new data points.
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This synthesis dataset contains records of freshwater peat and lake sediments from continental shelves and coastal areas. Information included is site location (when available), thickness and description of terrestrial sediments as well as underlying and overlying sediments, dates (when available), and references.
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Le projet de recherche-création proposé survole la québécité à travers un pan majeur de l’étude des Amériques : le territoire. L’adoption du territoire québécois, de son espace, et de sa densité – effectué à la fois sous un axe méridional (le Saint-Laurent) et septentrional (le Nord) –, s’effectue dans mon corpus acousmatique à travers l’utilisation de concepts théoriques établis par plusieurs figures québécoises et internationales. La description des sources d'inspiration du cycle d’œuvres acousmatique proposé, étant principalement issues de sphères extramusicales — la démarche de divers artistes et chercheurs québécois ayant contribué à l’émergence poétique de mon corpus tels que Pierre Perrault, René Derouin, Daniel Chartier, et Louis-Edmond Hamelin — y tient une place importante. La portion musicale est effectuée de façon analytique à l’aide de deux méthodes propres au genre électroacoustique – analyse typologique de Pierre Schaeffer, et fonctionnelle de Stéphane Roy –, qui, à travers l’œuvre de certains compositeurs de musiques électroniques internationaux permettent de souligner la pluralité des conceptions territoriales et le réseau sémantique universel sous-jacent, laissant place à une lecture plus large de cette thématique. La méthodologie proposée permet donc à la fois de cerner l’universel – modèles naturels, références psychoacoustiques –, le local – utilisation de poèmes québécois, référents animaux ou anecdotiques précis tels que des cris d’oiseaux et des prises sonores du Saint-Laurent –, et la relation dichotomique entre la nature et la culture dans mon corpus, afin qu’émerge un discours musical cohérent basé sur le territoire québécois.