969 resultados para Gomez de Dussan, Beatriz


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Anexo: Servicios de Orientaci??n en la ciudad de Cuenca

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Most authors struggle to pick a title that adequately conveys all of the material covered in a book. When I first saw Applied Spatial Data Analysis with R, I expected a review of spatial statistical models and their applications in packages (libraries) from the CRAN site of R. The authors’ title is not misleading, but I was very pleasantly surprised by how deep the word “applied” is here. The first half of the book essentially covers how R handles spatial data. To some statisticians this may be boring. Do you want, or need, to know the difference between S3 and S4 classes, how spatial objects in R are organized, and how various methods work on the spatial objects? A few years ago I would have said “no,” especially to the “want” part. Just let me slap my EXCEL spreadsheet into R and run some spatial functions on it. Unfortunately, the world is not so simple, and ultimately we want to minimize effort to get all of our spatial analyses accomplished. The first half of this book certainly convinced me that some extra effort in organizing my data into certain spatial class structures makes the analysis easier and less subject to mistakes. I also admit that I found it very interesting and I learned a lot.

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Plant-plant interactions are driven by environmental conditions, evolutionary relationships (ER) and the functional traits of the plants involved. However, studies addressing the relative importance of these drivers are rare, but crucial to improve our predictions of the effects of plant-plant interactions on plant communities and of how they respond to differing environmental conditions. To analyze the relative importance of - and interrelationships among - these factors as drivers of plant-plant interactions, we analyzed perennial plant co-occurrence at 106 dryland plant communities established across rainfall gradients in nine countries. We used structural equation modelling to disentangle the relationships between environmental conditions (aridity and soil fertility), functional traits extracted from the literature, and ER, and to assess their relative importance as drivers of the 929 pairwise plant-plant co-occurrence levels measured. Functional traits, specifically facilitated plants' height and nurse growth form, were of primary importance, and modulated the effect of the environment and ER on plant-plant interactions. Environmental conditions and ER were important mainly for those interactions involving woody and graminoid nurses, respectively. The relative importance of different plant-plant interaction drivers (ER, functional traits, and the environment) varied depending on the region considered, illustrating the difficulty of predicting the outcome of plant-plant interactions at broader spatial scales. In our global-scale study on drylands, plant-plant interactions were more strongly related to functional traits of the species involved than to the environmental variables considered. Thus, moving to a trait-based facilitation/competition approach help to predict that: (1) positive plant-plant interactions are more likely to occur for taller facilitated species in drylands, and (2) plant-plant interactions within woody-dominated ecosystems might be more sensitive to changing environmental conditions than those within grasslands. By providing insights on which species are likely to better perform beneath a given neighbour, our results will also help to succeed in restoration practices involving the use of nurse plants. (C) 2014 Geobotanisches Institut ETH, Stiftung Ruebel. Published by Elsevier GmbH. All rights reserved.

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Meir Kayserling

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Signatur des Originals: S 36/F08678

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Fil: Sánchez, María Carolina. Universidad Nacional de Tucumán

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Las organizaciones, colectivos y activistas por los Derechos Humanos en Costa Rica abajo firmantes, emitimos este comunicado como una acción desesperada de lucha por la vida de Beatriz ante la inercia del sistema de justicia salvadoreño. Esta mujer salvadoreña de 22 años, embarazada ya de 23 semanas, necesita urgentemente una interrupción terapéutica del embarazo para salvar su vida. Ella sufre de Lupus Eritematosos Discoidea e insuficiencia renal aguda y su embarazo está exacerbando la enfermedad, poniendo su vida y su salud en grave riesgo. El producto de su embarazo es un feto con anencefalia por lo que aún si fuera posible llevar el embarazo a término, este no es capaz de sobrevivir fuera del útero por más de algunas horas. Sin embargo, la prohibición absoluta del la interrupción del embarazo en El Salvador, incluso cuando la vida de la mujer corre riesgo, repercute en el derecho de Beatriz a salvar su vida y su salud ya que se encuentran ante la advertencia de que cualquier médico que le pudiera practicar la interrupción terapéutica y ella misma se enfrentarán a décadas de prisión.

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A partir del conocido ensayo de Beatriz Sarlo nos proponemos examinar las diferentes estrategias de escritura utilizadas al enmarcar en el espacio de la textualidad, no solamente una pluralidad interdisciplinaria, compleja y (des)ordenada, sino el establecimiento y entrecruzamiento de diferentes etapas temporales. El inteligente manejo de estos recursos le permite al trabajo ostentar una mayor densidad conceptual y un desafío permanente al lector. Este deberá realizar un trabajo de complementación e intercalación por demás exigente, para establecer las reglas de un "solitario", que lo obliga a "barajar" constantemente los hechos, siguiendo la idea de A. Touraine, con respecto a la historia