Sarah Bernhardt, Rollenbild, in: Edmond Rostand: L'Aiglon

Signatur des Originals: S 36/F12412

Sarah Bernhardt, Rollenbild, Brustbild

Signatur des Originals: S 36/F12413

Sarah Mountain als Matilda, Szenenfoto

Signatur des Originals: S 36/G00107

Sarah Bernhardt, Kniestück

Signatur des Originals: S 36/G02805

Plebe y revolución : la participación popular durante las guerras de independencia en el Perú, 1808-1824

Actualmente una de las variantes historiográficas más importantes en el estudio de la independencia en América Latina está circunscrita al análisis de la participación política de los grupos populares. En ese sentido, en aquel contexto de guerra y lucha revolucionaria en el Perú, que va desde la crisis hispana de 1808 hasta la independencia definitiva en 1824, esta investigación, a partir de un conjunto de fuentes de archivo, impresos y periódicos diversos, desarrolla las imágenes y representaciones que las elites peruanas construyeron de estos sectores sociales, algunas de las respuestas que estos últimos les infringieron y las múltiples alternativas políticas, que en aquel escenario beligerante, todos estos actores supieron concebir, negociar y utilizar políticamente.

Horizontal profiles of longwave and shortwave radiation components over sea ice near Barrow, Alaska during the 2011 melt

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.