1000 resultados para Facultad de Ciencias Administrativas y Económicas – Universidad Icesi
Resumo:
No perodo que decorre entre o sculo XVI e o incio do sculo XIX, com o alargamento e ligao das rotas martimas registaram-se grandes mudanas na rede do comrcio internacional. Nesta conjuntura histrica a rota martima da seda contribuiu para a concretizao do intercmbio e comrcio direto entre a China e o Ocidente e para a evoluo da cidade de Macau e o gradual aumento da procura de produtos de seda chineses no mercado internacional e da prata vinda da Amrica. Com base nas ligaes entre Macau e Manila pretendemos dar um contributo para a compreenso da complexidade e amplitude das redes comerciais que criam um comrcio escala global.
Resumo:
La protena mamoglobina, particularmente su regin central, es un potencial biomarcador para la deteccin del cncer de mama. Los anticuerpos dirigidos contra esta regin permiten establecer la concentracin de mamoglabina en el suero y diferenciar entre individuos sanos y pacientes que tienen dicha enfermedad. Los pacientes con cncer de mama presentan una concentracin mayor de mamoglobina srica que la de los individuos sanos. Esta parece no estar influenciada por los cambios hormonales que ocurren en la vida de la mujer.
Resumo:
Understanding the effect of habitat fragmentation is a fundamental yet complicated aim of many ecological studies. Beni savanna is a naturally fragmented forest habitat, where forest islands exhibit variation in resources and threats. To understand how the availability of resources and threats affect the use of forest islands by parrots, we applied occupancy modeling to quantify use and detection probabilities for 12 parrot species on 60 forest islands. The presence of urucuri (Attalea phalerata) and macaw (Acrocomia aculeata) palms, the number of tree cavities on the islands, and the presence of selective logging,and fire were included as covariates associated with availability of resources and threats. The model-selection analysis indicated that both resources and threats variables explained the use of forest islands by parrots. For most species, the best models confirmed predictions. The number of cavities was positively associated with use of forest islands by 11 species. The area of the island and the presence of macaw palm showed a positive association with the probability of use by seven and five species, respectively, while selective logging and fire showed a negative association with five and six species, respectively. The Blue-throated Macaw (Ara glaucogularis), the critically endangered parrot species endemic to our study area, was the only species that showed a negative association with both threats. Monitoring continues to be essential to evaluate conservation and management actions of parrot populations. Understanding of how species are using this natural fragmented habitat will help determine which fragments should be preserved and which conservation actions are needed.
Resumo:
The metamorphosed banded iron formation from the Nogoli Metamorphic Complex of western Sierra de San Luis, Eastern Sierras Pampeanas of Argentina (Nogoli area, 32 degrees 55`S-66 degrees 15`W) is classified as an oxide facies iron formation of Algoma Type, with a tectonic setting possibly associated with an island arc or back arc, on the basis of field mapping, mineral and textural arrangements and whole rock geochemical features. The origin of banded iron formation is mainly related to chemical precipitation of hydrogenous sediments from seawater in oceanic environments. The primary chemical precipitate is a result of solutions that represent mixtures of seawater and hydrothermal fluids, with significant dilution by maficultramafic volcanic and siliciclastic materials. Multi-stage T(DM) model ages of 1670, 1854 and 1939 Ma and positive, mantle-like xi Nd((1502)) values of +3.8, +1.5 and +0.5 from the banded iron formation are around the range of those mafic to ultramafic meta-volcanic rocks of Nogoli Metamorphic Complex, which are between 1679 and 1765 Ma and +2.64 and +3.68, respectively. This Sm and Nd isotopic connection suggests a close genetic relationship between ferruginous and mafic-ultramafic meta-volcanic rocks, as part of the same island arc or back arc setting. A previous Sm-Nd whole rock isochron of similar to 1.5 Ga performed on mafic-ultramafic meta-volcanic rocks led to the interpretation that chemical sedimentation as old as Mesoproterozoic is possible for the banded iron formation. A clockwise P-T path can be inferred for the regional metamorphic evolution of the banded iron formation, with three distinctive trajectories: (1) Relict prograde M(1)-M(3) segment with gradual P and T increase from greenschist facies at M(1) to amphibolite facies at M(3). (2) Peak P-T conditions at high amphibolite-low granulite facies during M(4). (3) Retrograde counterpart of M(4), that returns from amphibolite facies and stabilizes at greenschist facies during M(5). Each trajectory may be regarded as produced by different tectonic events related to the Pampean? (1) and the Famatinian (2 and 3) orogenies, during the Early to Middle Paleozoic. The Nogoli Metamorphic Complex is interpreted as part of a greenstone belt within the large Meso- to Neoproterozoic Pampean Terrane of the Eastern Sierras Pampeanas of Argentina. (C) 2009 Elsevier Ltd. All rights reserved.
Resumo:
Los cuestionarios de comprensin lectora sobre un texto escrito en ingls se disean, por lo general, en base a preguntas literales, aquellas que apuntan a desarrollar las capacidades mnemmicas de los alumnos. La comprensin inferencial es poco practicada en los cursos de lecto-comprensin a nivel universitario. Este trabajo examina contrastativamente las estrategias lectoras de comprensin Iiteral e inferencial empleadas por los alumnos que cursaron Ingls I en la Facultad de Ciencias Polticas y Socides, Universidad Nacional de Cuyo (UNCuyo) en el ao 2004. El cuestionario de comprensin lectora incluye dos preguntas literales y dos inferenciales sobre un texto argumentativo escrito en ingls. Se analizaron 58 respuestas a preguntas literales e inferenciales (116 en total) usando una adaptacin de la taxonoma propuesta por Parodi et al. (1997). Los resulrados indicaron que, si bien los alumnos mostraron algunas dificultades para responder preguntas literales, ms limitaciones se observaron en cuanto a las capacidades estratgicas de los alumnos de comprensin inferencial. Se concluye que un entrenamiento sistemtico de estrategias de comprensin literal y,en especial, inferencial es necesario para promover el desarrollo de capacidades cognitivas de mayor jerarqua y exigencia.
Resumo:
This paper discusses some aspects of hunter-gatherer spatial organization in southern South Patagonia, in later times to 10,000 cal yr BP. Various methods of spatial analysis, elaborated with a Geographic Information System (GIS) were applied to the distributional pattern of archaeological sites with radiocarbon dates. The shift in the distributional pattern of chronological information was assessed in conjunction with other lines of evidence within a biogeographic framework. Accordingly, the varying degrees of occupation and integration of coastal and interior spaces in human spatial organization are explained in association with the adaptive strategies hunter-gatherers have used over time. Both are part of the same human response to changes in risk and uncertainty variability in the region in terms of resource availability and environmental dynamics.
Resumo:
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