6 resultados para Cono de escoria

em Portal de Revistas Científicas Complutenses - Espanha


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Abundant material of turtles from the early Oligocene site of Boutersem-TGV (Boutersem, Belgium), is presented here. No information on the turtles found there was so far available. All the turtle specimens presented here are attributable to a single freshwater taxon that is identified as a member of Geoemydidae, Cuvierichelys. It is the first representative of the ‘Palaeochelys s. l.–Mauremys’ group recognized in the Belgian Paleogene record. This material, which allows to know all the elements of both the carapace and the plastron of the taxon, cannot be attributed to the only species of the genus Cuvierichelys so far identified in the Oligocene, the Spanish form Cuvierichelys iberica. The taxon from Boutersem is recognized as Cuvierichelys parisiensis. Thus, both the paleobiogeographic and the biostratigraphic distributions of Cuvierichelys parisiensis are extended, its presence being confirmed for the first time outside the French Eocene record. The validity of some European forms is refuted, and several characters previously proposed as different between Cuvierichelys iberica and Cuvierichelys parisiensis are recognized as subjected to intraspecific variability.

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Juniperus navicularis Gand. is a dioecious endemic conifer that constitutes the understory of seaside pine forests in Portugal, areas currently threatened by increasing urban expansion. The aim of this study is to assess the conservation status of previously known populations of this species located on its core area of distribution. The study was performed in south-west coast of Portugal. Three populations varying in size and pine density were analyzed. Number of individuals, population density, spatial distribution and individual characteristics of junipers were estimated. Female cone, seed characteristics and seed viability were also evaluated. Results suggest that J. navicularis populations are vulnerable because seminal recruitment is scarce, what may lead to a reduction of genetic variability due solely to vegetative propagation. This vulnerability seems to be strongly determined by climatic constraints toward increasing aridity. Ratio between male and female shrubs did not differ from 1:1 in any population. Deviations from 1:1 between mature and non-mature plants were found in all populations, denoting population ageing. Very low seed viability was observed. A major part of described Juniperus navicularis populations have disappeared through direct habitat loss to urban development, loss of fitness in drier and warmer locations and low seed viability. This study is the first to address J. navicularis conservation, and represents a valuable first step toward this species preservation. 

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La investigación que se presenta fue desarrollada dentro del campo de los estudios regionales y con visión transdisciplinar. Tuvo como objetivo deconstruir conjuntamente con los participantes, las capacidades humanas regionales de nosotros los docentes de educación básica, en nuestros procesos de reflexión entre teoría y práctica, en los que se consideraron las condicionantes estructurales, en niveles macro y micro regionales, con el alcance de haber identificado el potencial de cambio en nuestra praxis de docente como acción ante nuestros alumnos, quienes configuran el tejido social de Tuxtla Gutiérrez. Desde una perspectiva sociocrítica, se tomó como punto de fuga o núcleo la teoría crítica con fundamento filosófico en la escuela de Fráncfort y con una postura epistemológica basada en el construccionismo por la estrecha relación sujeto-objeto en el estudio; por ende se empleó la metodología investigaciónacción a través de diversas técnicas e instrumentos. Los resultados fueron concentrados en categorías que facilitaron su discusión: primeramente con el potencial de cambio, que adquirió significado mediante el desarrollo de las capacidades de reflexión y conciencia del docente; luego se presentaron las capacidades humanas, de nosotros los docentes, en las que destacaron como base de otras, las capacidades de amor, autoestima y compromiso. Posteriormente, se describió la reflexión docente sobre la concepción del beneficio personal hacia el beneficio colectivo. Finalmente, se discutió sobre la proyección de la acción docente dentro de la relación alumno y región. Se concluyó que las capacidades humanas y el potencial de cambio, deconstruidos conjuntamente con los docentes participantes, fueron la respuesta del proceso investigativo en un determinado tiempo y espacio, como posibilidades de acción docente hacia la tan deseada transformación socioeducativa regional.

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En el presente trabajo indagaremos sobre la reconfiguración de las dinámicas institucionales en dos cárceles de la provincia de Santa Fe, Argentina, tras la inserción del dispositivo religiosoevangélico- pentecostal. Los casos serán las penitenciarías n° 3 —mediana seguridad— y n° 11 — máxima seguridad—, y nos interrogaremos sobre las relaciones de reciprocidad que el dispositivo religioso configura en el encierro, en cómo dichas relaciones definen nuevas estrategias de gobierno por parte del servicio penitenciario y de qué manera se rediseñan las relaciones de poder en el dispositivo carcelario. Abordaje comparativo que responde a la hipótesis de que el dispositivo religioso-evangélicopentecostal construye matrices comunes de ordenamiento social, funcionamiento y reciprocidades en el encierro pero, al mismo tiempo, consolida su funcionamiento a raíz de una identificación precisa de las necesidades y oportunidades de los sujetos según atraviesen situaciones de ingreso o egreso carcelario.

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This article analyses the context of production and local situations of appropriation and resignification related to the folk song “Fire on Animaná” as well as the request and mobilization (“The animanazo”) provoked by this song in order to examine different mechanisms and foundations by which a population connect with an event from its community past, identifying with this and taking it in a specific way. In this article we combine discourse analysis of the song and of interviews to participants in this event with the reconstruction —through ethnographic observation— of how to use this song.

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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.