995 resultados para Lamothe-Langon, Etienne-Léon, baron de, 1786-1864.


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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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En este trabajo se reconstruye el registro gráfico de 1864 y se comparan los resultados con otros ya desarrollados para 1822, 1830 y 1850, todos en la parte correspondiente a los partidos de Chascomús, Ranchos y Monte. Así, se correlacionan series completas de datos provenientes de duplicados de mensuras, solicitudes de tierras, protocolos de escribanos y testamentarias, con el fin de analizar la extensión de los campos y la tenencia de la tierra en estos partidos. De esta manera se aporta información para utilizar con mejores resultados la cartografía disponible para la época, revelando sus posibilidades expresivas en la comprensión de la ocupación y acceso a la propiedad legal de la tierra durante el siglo XIX, en ese sentido, aquí se evalúa el parcelamiento de los terrenos y el grado de concentración de la propiedad

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El siguiente trabajo realiza un análisis teórico e historiográfico a partir de la obra de Abraham Léon, recientemente editada en la Argentina. Además de reflexionar sobre el rol de los judíos a lo largo de la historia, considerar su vinculación con actividades mercantiles, y estructurar una mirada sobre las causas del antisemitismo, el objetivo es discutir la caracterización socioeconómica de los períodos precapitalistas y entender la dinámica de cambio que originó un nuevo sistema de producción