553 resultados para Procaspase-2S
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La ponencia retoma los resultados preliminares de un proyecto de investigación en curso en la Universidad Pedagógica de la Provincia de Buenos Aires referido a la implementación del Plan FinEs 2 Secundaria en tres distritos del Conurbano Bonaerense. Se analiza la producción de esta política pública, su desarrollo e institucionalización en el período 2011-2014, concebido como una arena de disputa en la cual los sujetos y organizaciones participantes a nivel local generan "apropiaciones" (Ezpeleta, 2004), que plasman en sentidos, prácticas y dispositivos singulares, producto de una particular trama de relaciones. La hechura del Plan FinEs 2S transita en los intercambios entre actores referenciados en organizaciones y ámbitos gubernamentales diversos, impregnados por racionalidades, intereses y lógicas atribuibles al sistema educativo, a la política social, a la organización popular. Las permanentes interacciones que se tejen entre ellos en la resignificación cotidiana del Plan y las diversas instancias de negociación, cooperación y conflicto que se van hilvanando, lejos de paralizar su despliegue, resultan particularmente potentes. En los clivajes planteados entre "educación"/"política", "escuela"/"programa de inclusión", "burocracia estatal"/"militancia", se tensionan las tradiciones selectivas del nivel secundario, la dimensión relacional de las capacidades estatales (Alonso, 2007) y la formas hegemónicas de la política territorial
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La ponencia retoma los resultados preliminares de un proyecto de investigación en curso en la Universidad Pedagógica de la Provincia de Buenos Aires referido a la implementación del Plan FinEs 2 Secundaria en tres distritos del Conurbano Bonaerense. Se analiza la producción de esta política pública, su desarrollo e institucionalización en el período 2011-2014, concebido como una arena de disputa en la cual los sujetos y organizaciones participantes a nivel local generan "apropiaciones" (Ezpeleta, 2004), que plasman en sentidos, prácticas y dispositivos singulares, producto de una particular trama de relaciones. La hechura del Plan FinEs 2S transita en los intercambios entre actores referenciados en organizaciones y ámbitos gubernamentales diversos, impregnados por racionalidades, intereses y lógicas atribuibles al sistema educativo, a la política social, a la organización popular. Las permanentes interacciones que se tejen entre ellos en la resignificación cotidiana del Plan y las diversas instancias de negociación, cooperación y conflicto que se van hilvanando, lejos de paralizar su despliegue, resultan particularmente potentes. En los clivajes planteados entre "educación"/"política", "escuela"/"programa de inclusión", "burocracia estatal"/"militancia", se tensionan las tradiciones selectivas del nivel secundario, la dimensión relacional de las capacidades estatales (Alonso, 2007) y la formas hegemónicas de la política territorial
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Patterns of distribution and variations of group and monosaccharide compositions of carbohydrates in suspended matter of the Pacific Ocean were studied. It is shown that carbohydrate content of surface ocean waters depends on reproduction of organic matter by phytoplankton. Water-insoluble polysaccharides (average 77.9% of total) predominate in composition of carbohydrates in suspended matter. Water-soluble polysaccharides and oligosaccharides were detected in considerably smaller quantities (average 12.4 and 7.3% respectively). Free monosaccharides were not detected. The main sugars in all isolated groups of carbohydrates of suspended matter are hexoses, which account for 90.8% in oligosaccharides, 64.9% in water-soluble polysaccharides, and 69.8% in water-insoluble polysaccharides. Determination of monosaccharide composition of carbohydrates in suspension showed that apparently they basically consist of mixture of reserve and structural polysaccharides (or their residues) of phytoplankton organisms.
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This study addresses changes in the absolute magnitude and spatial geometry of particle flux and export production in a meridional transect across the central equatorial Pacific Ocean's upwelling system during oxygen isotope Stage 11 and Stage 12 and compares these time periods to the current Holocene interglacial system. Temporal and spatial variability in several chemical proxies of export production, and in particular the distributions of Ba, scavenged Al, and P, are studied in a suite of sediment cores gathered along a cross-equator transect at 5°S, 2°S, 0°, 2°N, and 4°N. Because this latitudinal range preserves strong gradients in biogenic particle flux in the modern equatorial Pacific Ocean, we are able to assess variations in the relative magnitude of export production as well as the meridional width of the equatorial system through the late Quaternary glacial/interglacial cycles. During interglacial oxygen isotope Stage 11 the chemical proxies each indicate lower particle flux and export production than during Stage 12. These records are consistent throughout the transect during this time period, but geographic narrowing (during the interglacial) and widening (during the glacial) of the meridional gradient also occurs. Although carbonate concentration varies dramatically through glacial/interglacial cycles at all latitudes studied, the productivity proxies record only minimal glacial/interglacial change at 5°S and 4°N, indicating that the carbonate minima at these latitudes is controlled dominantly by dissolution rather than production. The chemical data indicate that although the spatial geometry of the system during Stages 11 and 12 indicates maximum productivity at the equator during both glacial and interglacial conditions, the absolute magnitude of export production integrated from 5°S to 4°N during Stage 11 was 25-50% less than during Stage 12, and also was 25-50% less than it is now.
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SST variability within the Atlantic cold tongue (ACT) region is of climatic relevance for the surrounding continents. A multi cruise data set of microstructure observations is used to infer regional as well as seasonal variability of upper ocean mixing and diapycnal heat flux within the ACT region. The variability in mixing intensity is related to the variability in large scale background conditions, which were additionally observed during the cruises. The observations indicate fundamental differences in background conditions in terms of shear and stratification below the mixed layer (ML) for the western and eastern equatorial ACT region causing critical Froude numbers (Fr) to be more frequently observed in the western equatorial ACT. The distribution of critical Fr occurrence below the ML reflects the regional and seasonal variability of mixing intensity. Turbulent dissipation rates (?) at the equator (2°N-2°S) are strongly increased in the upper thermocline compared to off-equatorial locations. In addition, ? is elevated in the western equatorial ACT compared to the east from May to November, whereas boreal summer appears as the season of highest mixing intensities throughout the equatorial ACT region, coinciding with ACT development. Diapycnal heat fluxes at the base of the ML in the western equatorial ACT region inferred from ? and stratification range from a maximum of 90 Wm-2 in boreal summer to 55 Wm-2 in September and 40 Wm-2 in November. In the eastern equatorial ACT region maximum values of about 25 Wm-2 were estimated during boreal summer reducing to about 5 Wm-2 towards the end of the year. Outside the equatorial region, inferred diapycnal heat fluxes are comparably low rarely exceeding 10 Wm-2. Integrating the obtained heat flux estimates in the ML heat budget at 10°W on the equator accentuates the diapycnal heat flux as the largest ML cooling term during boreal summer and early autumn. In the western equatorial ACT elevated meridional velocity shear in the upper thermocline contributes to the enhanced diapycnal heat flux within this region during boreal summer and autumn. The elevated meridional velocity shear appears to be associated with intra-seasonal wave activity.
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In this work, two SMS algorithms are presented for an objective design with different selected ray-bundles: three meridian ray-bundles (3M) and one meridian and two skew ray-bundles (1M-2S), the latter from pin hole point of view, provides a better sampling of the phase space. Results obtained with different algorithms will be compared.
Resumo:
In this work, two SMS algorithms are presented for an objective design with different selected ray-bundles: three meridian ray-bundles (3M) and one meridian and two skew ray-bundles (1M-2S), the latter from pin hole point of view, provides a better sampling of the phase space. Results obtained with different algorithms will be compared
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Marca tip. en port. (Vaccaro, 231)
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Marca tip. en port. (Vaccaro, 231)
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Recens in lucem editi
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The 2010 Haiti earthquake, occurred on January 12th at 16:53:09 local time (21:53:09 UTC) with epicentral distance of 15 km from the capital Port au Prince, MW 7.0 and 13 km hypocenter deep, was the strongest event in the area since happened in 1770. The maximum macroseismic intensity was estimated as X (MMI scale). The aim of this research is to obtain a preliminary zonation of Port-au-Prince in terms of predominant resonance periods of ground. A total of 36 short-period ambient noise records have been carried out on a grid of about 500x500m. H/V spectral ratio method (HVSR) has been applied to determine the predominant period at each point. The lowest values (<0.2s) predominate in the southern part of the city, composed by Miocene conglomerates, while highest values (> 0.45s) correspond to the center and western parts, composed of Pleistocene-Holocene alluvial deposits and anthropogenic land reclaimed from the sea. We have determined the ground VS30 structure inside National Palace garden, using simultaneous ambient noise measurements. An array made up of 6 sensors were used, with 5 of them uniformly distributed along a circumference and a sixth one placed in its centre. The records were analyzed by using the spatial autocorrelation method (SPAC). The VS 30 value obtained was 331m/sec, in good agreement with the average values obtained for this area by other authors, using prospecting techniques.