988 resultados para Lockhart, Sophia Scott, 1799-1837.
Resumo:
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.
Meteorological observations during LANCASTER cruise from Spithead to Table Bay started at 1799-09-08
Resumo:
Fil: Bonilla, Manuel. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.
Resumo:
Tabla de contenidos: El socialismo utópico en la Argentina I : Los sansimonianos argentinos de 1837. El socialismo utópico en la Argentina II : Los exiliados románticos en la Argentina de la Organización Nacional. Los emigrados franceses de la década de 1870 : La Comuna de París, la Internacional y el Marx revolucionario [l871-l875]. Segunda recepción de Marx : Los emigrados alemanes y la recepción del Socialismo científico [1882-1892]. Tercera recepción: Marx en los orígenes del socialismo argentino : De la edición del Manifiesto comunista [1893] a la traducción de El Capital por Juan B. Justo [1898].
Resumo:
Este artículo se propone analizar la noción de experiencia presente en la obra de la historiadora feminista norteamericana Joan W. Scott. Se realiza un recorrido por las conceptualizaciones de dicha noción utilizadas en la Historia Social de los años sesenta, setenta y ochenta con las cuales Scott ha tenido importantes diálogos y discusiones. Por último, se presentan algunas críticas y limitaciones que, tanto desde la historia con perspectiva de género como desde la teoría feminista, se han señalado sobre el concepto de experiencia desarrollada por Scott
Resumo:
Fil: Alfón, Fernando. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.