763 resultados para Hafter, Evelyn
Resumo:
Fil: Vargas, Evelyn Teresita. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.
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Tabla de contenidos: La pregunta por los límites de la ciencia / Alfredo Marcos. Creencia pragmática. Justificación y valores epistémicos según el pragmatismo clásico / Evelyn Vargas. El problema de la reflexividad de los estudios de la ciencia: una perspectiva deweyana / Federico E. López. Enseñanza de las ciencias naturales: de los productos a las prácticas / Hernán Miguel. Experiencia e Inteligencia: la relación medios-fines en la filosofía de la educación de John Dewey / Horacio Héctor Mercau. El boicot a Elsevier y sus implicaciones respecto del acceso a las publicaciones científicas / Miguel Fuentes. Hacia una filosofía política del conocimiento científico / Ricardo J. Gómez. Dimensiones colectivas del conocimiento en la Modernidad / Silvia Manzo. Filosofía del conocimiento y racionalidad: Lacey vs. Douglas en torno al ideal de ciencia libre de valores / Victoria Paz Sánchez García. Compreensao e Significado / Wagner de Campos Sanz. O significado do Autoconhecimento e Racionalidade / Waldomiro J. Silva Filho. Conocimiento simbólico de Leibniz a Husserl / Jairo J. da Silva, Abel Lassalle Casanave, Javier Legris.
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El Desarrollo Local Territorial es un proceso endógeno de construcción social que apunta a la generación de capacidades locales aprovechando los recursos territoriales para fortalecer el entramado socio-institucional y el sistema económico-productivo y movilizarlos para mejorar la calidad de vida de una comunidad. Un aspecto relevante, de cara al Desarrollo Local, es conocer la estructura y evolución de la población, el perfil del mercado de trabajo, así como los principales problemas de empleo en la zona en consideración. La Región de Cuyo, integrada históricamente por las provincias de Mendoza, San Juan y San Luis, presenta singularidades tanto en sus perfiles productivos como en su desarrollo económico. En particular, la Provincia de San Luis se caracteriza fuertemente por la aplicación de una sostenida política pública de reducción de los efectos de desempleo e inequidad que se manifestaron profundamente desde la devaluación de la moneda. En ese sentido, este trabajo -que continúa y actualiza la línea de un estudio previo relacionado con la Región Centro Ampliada, elaborado con datos provisorios del Censo 2010- pretende aportar al estudio del mercado laboral de la Región Cuyo y su relación con el desarrollo territorial, elaborando un diagnóstico de las provincias involucradas. Como fuente principal de información, se utiliza la Base de Microdatos de la eph, que releva y publica el indec, para el período comprendido entre 2003 y 2011 y datos definitivos del Censo Nacional de Población, Hogares y Viviendas 2010
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Based on results of field observations in August 1998, July 2000, and August 2001 composition and quantitative distribution of coccolithophorids in the middle part of the Eastern Bering Sea shelf between 56°052'N and 59°019'N was characterized. Emiliania huxleyi abundance, biomass, and population structure as well as role of species in the coccolithophorid community and phytoplankton as a whole were evaluated. Abundance of the species in the upper mixed layer in bloom areas was 1-3 mln cells/l and biomass made up 30-75 mg C/m**3. E. huxleyi share in total phytoplankton numbers and biomass at that reached 98% and 84% respectively. Significant spatial heterogeneity of E. huxleyi, quantitative distribution and population size structure, as well as asynchronism in population development in neighboring parts of the bloom area were shown. The time period, during which population structure in certain part of the area shifts from domination of juvenile cells without coccoliths to a phase of active detritus formation with dying coccolithophorid cells involved, may be estimated as two weeks. A conclusion is made that after anomalous E. huxleyi bloom in 1997 mass development of coccolithophorids became a characteristic feature of phytoplankton community's seasonal succession in the middle part of the Eastern Bering Sea shelf.
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Interstitial waters from four sites of the Japan Sea (794 to 797) have been analyzed for stable isotopes (delta D, delta11B, delta18O, and delta34S) and 87Sr/86Sr, besides major and minor ions. The isotopic composition is dominated by organic matter degradation, alteration of ash layers and volcaniclastic sands, silica transformation (opal A/CT), and basement alteration. Organic matter degradation and corresponding sulfate reduction leads to 32S depletion and is dependent upon sedimentation rate. The remaining sulfate reservoir is characterized by very "heavy" delta34S ratios, up to +93 ? (rel. CDT = Canyon Diabolo Troilite). "Barite fronts," which may develop in such sediments, should also be characterized by very "heavy" sulfur isotopes. The alteration of volcaniclastic material in the Quaternary sections influences the delta18O (-1.5 ? shift) and delta11B (desorption and later adsorption of "labile"11B). A pronounced positive delta11B anomaly at Site 795 represents the depth range of preferential 10B uptake by alteration products of the ash layers. At Site 796 delta D, delta11B, and 87Sr/86Sr are severely affected by alteration processes of volcaniclastic sands. The opal A/CT transformation may influence the oxygen isotopes and serves as a potential source for B, which is liberated at this interval at Site 795. This positive B anomaly is not reflected in the delta11B profile. Basement alteration processes dominate the sedimentary sequence below the opal A/CT transition, which serves as a chemical and physical boundary. The decreases in delta D and delta18O are probably related to a "paleo ocean water reservoir" situated in the permeable Layer II of the oceanic crust, as is indicated by the positive correlation between these two parameters. Besides Mg, alkalies and delta18O basement rocks also serve as a sink for 11 B (Site 795) and are the source for the Ca and Sr increases, as is documented by the less radiogenic 87Sr/86Sr ratio. 87Sr/86Sr ratios for the lowermost pore waters from Site 795 (0.70529) are comparable to those from volcaniclastic rocks from the "Green Tuff' region (0.704 to 0.706) and oil field brines from the Niigata Oil Field.