984 resultados para Brock, Isaac, Sir, 1769-1812.


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An integrated instrument package for measuring and understanding the surface radiation budget of sea ice is presented, along with results from its first deployment. The setup simultaneously measures broadband fluxes of upwelling and downwelling terrestrial and solar radiation (four components separately), spectral fluxes of incident and reflected solar radiation, and supporting data such as air temperature and humidity, surface temperature, and location (GPS), in addition to photographing the sky and observed surface during each measurement. The instruments are mounted on a small sled, allowing measurements of the radiation budget to be made at many locations in the study area to see the effect of small-scale surface processes on the large-scale radiation budget. Such observations have many applications, from calibration and validation of remote sensing products to improving our understanding of surface processes that affect atmosphere-snow-ice interactions and drive feedbacks, ultimately leading to the potential to improve climate modelling of ice-covered regions of the ocean. The photographs, spectral data, and other observations allow for improved analysis of the broadband data. An example of this is shown by using the observations made during a partly cloudy day, which show erratic variations due to passing clouds, and creating a careful estimate of what the radiation budget along the observed line would have been under uniform sky conditions, clear or overcast. Other data from the setup's first deployment, in June 2011 on fast ice near Point Barrow, Alaska, are also shown; these illustrate the rapid changes of the radiation budget during a cold period that led to refreezing and new snow well into the melt season.

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Fil: Ennis, Juan Antonio. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación. Instituto de Investigaciones en Humanidades y Ciencias Sociales (UNLP-CONICET); Argentina.

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Entre la multitud de ficciones que se apropian u ocupan en los últimos años de la memoria del más traumático pasado reciente en España, hay una escena retomada más de una vez y de diversas formas: la del lector harto de la recurrencia del tema de la memoria. Entre las diversas respuestas que este hartazgo ha encontrado en la crítica, la historiografía y la ficción, la de Isaac Rosa sobresale no sólo por lo logrado de sus novelas, sino también porque la proliferación paródica de voces y estratos de sentido que las caracteriza evita las soluciones simples y polarizantes. La respuesta a los abusos de la memoria - y a los peligros que conllevan - propicia así no el abandono de la cuestión, sino una vuelta de tuerca desde la especificidad de la escritura literaria, que ante la posibilidad de banalización, neutralización u olvido, despliega estrategias que pueden traducirse en modos de intervención en el campo literario así como, desde su (relativa) especificidad, en el terreno de los debates en torno a lo más traumático del pasado reciente español.