973 resultados para GJ-876
Resumo:
El eje del presente trabajo será mostrar que en la obra de Theodor W. Adorno existe una relación entre la crítica al concepto de sujeto y el imperativo categórico qué el formula como petición de que Auschwitz no se repita. Nuestro objetivo será analizar tal relación, para mostrar de qué modo este imperativo categórico implica una autocrítica de la tradición filosófica, a los fines de sacar a luz aquellos elementos de la cultura que fueron cómplices de la ocurrencia de los campos de concentración. La idea que guía nuestro trabajo entonces es que el imperativo pos-Auschwitz que Adorno formula exige ser materializado mediante una crítica al concepto filosófico de sujeto de la modernidad. Esta hipótesis nos permitirá discutir dos puntos vinculados a esto: por un lado, nos permitirá indagar en la particularidad dialéctica y normativa del concepto de sujeto que Adorno formula y que lo distingue de otras críticas contemporáneas, y por otro lado, nos permitirá apreciar la relación entre reflexión filosófica y exigencia histórica a partir de la obra adorniana
Resumo:
The phytoplankton community composition and productivity in waters of the Amundsen Sea and surrounding sea ice zone were characterized with respect to iron (Fe) input from melting glaciers. High Fe input from glaciers such as the Pine Island Glacier, and the Dotson and Crosson ice shelves resulted in dense phytoplankton blooms in surface waters of Pine Island Bay, Pine Island Polynya, and Amundsen Polynya. Phytoplankton biomass distribution was the opposite of the distribution of dissolved Fe (DFe), confirming the uptake of glacial DFe in surface waters by phytoplankton. Phytoplankton biomass in the polynyas ranged from 0.6 to 14 µg Chl a / L, with lower biomass at glacier sites where strong upwelling of Modified Circumpolar Deep Water from beneath glacier tongues was observed. Phytoplankton blooms in the polynyas were dominated by the haptophyte Phaeocystis antarctica, whereas the phytoplankton community in the sea ice zone was a mix of P. antarctica and diatoms, resembling the species distribution in the Ross Sea. Water column productivity based on photosynthesis versus irradiance characteristics averaged 3.00 g C /m**2/d in polynya sites, which was approximately twice as high as in the sea ice zone. The highest water column productivity was observed in the Pine Island Polynya, where both thermally and salinity stratified waters resulted in a shallow surface mixed layer with high phytoplankton biomass. In contrast, new production based on NO3 uptake was similar between different polynya sites, where a deeper UML in the weakly, thermally stratified Pine Island Bay resulted in deeper NO3 removal, thereby offsetting the lower productivity at the surface. These are the first in situ observations that confirm satellite observations of high phytoplankton biomass and productivity in the Amundsen Sea. Moreover, the high phytoplankton productivity as a result of glacial input of DFe is the first evidence that melting glaciers have the potential to increase phytoplankton productivity and thereby CO2 uptake, resulting in a small negative feedback to anthropogenic CO2 emissions.
Resumo:
Fil: Pichinini, Mariana. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación. Instituto de Investigaciones en Humanidades y Ciencias Sociales (UNLP-CONICET); Argentina.
Resumo:
Drilling at Site 786, located in the center of the Izu-Bonin forearc basin, penetrated an apparently continuous section of middle Eocene/lower Oligocene volcaniclastic breccias and nannofossil oozes. Planktonic foraminiferal faunas underwent a gradual transition from relatively high-diversity middle Eocene through late Eocene tropical or warm-water assemblages to a cooler-water, less diverse assemblage during the early Oligocene. In the cosmopolitan benthic foraminiferal faunas, the major transition occurred during the early late Eocene. Middle Eocene benthic assemblages resembling the bathyal 'Lenticulina' fauna (characterized by Osangularia mexicana, Cibicidoides eocaenus, and several buliminid species) changed to an upper Eocene abyssal 'Globocassidulina subglobosa' fauna (characterized by Cibicidoides praemundulus, Globocassidulina subglobosa, Gyroidinoides girardanus, Oridorsalis umbonatus, and Siphonodosaria aculeata). Even though no large, abrupt faunal changes appear to have been associated with the assumed Eocene/Oligocene boundary, benthic species turnover continued through the late Eocene and into the early Oligocene. This resulted in a slightly lower diversity early Oligocene fauna dominated by three species: Laevidentalina sp., Bulimina jarvisi, and Gyroidinoides girardanus. The progression from a middle Eocene bathyal 'Lenticulina' fauna, rather than an abyssal 'Nuttallides truempyi' fauna, to an abyssal 'Globocassidulina subglobosa' fauna during the early late Eocene, suggests that a bathymetric deepening occurred at Site 786. Increased water depths may have resulted from tectonic subsidence.
Resumo:
El eje del presente trabajo será mostrar que en la obra de Theodor W. Adorno existe una relación entre la crítica al concepto de sujeto y el imperativo categórico qué el formula como petición de que Auschwitz no se repita. Nuestro objetivo será analizar tal relación, para mostrar de qué modo este imperativo categórico implica una autocrítica de la tradición filosófica, a los fines de sacar a luz aquellos elementos de la cultura que fueron cómplices de la ocurrencia de los campos de concentración. La idea que guía nuestro trabajo entonces es que el imperativo pos-Auschwitz que Adorno formula exige ser materializado mediante una crítica al concepto filosófico de sujeto de la modernidad. Esta hipótesis nos permitirá discutir dos puntos vinculados a esto: por un lado, nos permitirá indagar en la particularidad dialéctica y normativa del concepto de sujeto que Adorno formula y que lo distingue de otras críticas contemporáneas, y por otro lado, nos permitirá apreciar la relación entre reflexión filosófica y exigencia histórica a partir de la obra adorniana
Resumo:
Fil: Pichinini, Mariana. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación. Instituto de Investigaciones en Humanidades y Ciencias Sociales (UNLP-CONICET); Argentina.