Curso sobre Documentos electrónicos : Generalidades, metadatos

Fil: González, Claudia. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Comportamiento de los usuarios frente a la información en las escuelas de teatro

Fil: Tamborenea, Blanca Raquel. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Ética y acceso a la información

Se aborda el tema de la ética de la información y su incidencia sobre el acceso, poniendo énfasis en el aspecto deontológico, y se trata de afirmar la idea delcompromiso de los rofesionales de la información con el momento histórico en el que les toca desempeñarse.

Curso sobre Desafíos y oportunidades de la tecnología de la información en el servicio de referencia (Programa)

Fil: Pisarello, Rosa Zulema. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Clay mineraology and grain size composition of surface sediments from South Pacific Ocean

The reconstruction of low-latitude ocean-atmosphere interactions is one of the major issues of (paleo-)environmental studies. The trade winds, extending over 20° to 30° of latitude in both hemispheres, between the subtropical highs and the intertropical convergence zone, are major components of the atmospheric circulation and little is known about their long-term variability on geological time-scales, in particular in the Pacific sector. We present the modern spatial pattern of eolian-derived marine sediments in the eastern equatorial and subtropical Pacific (10°N to 25°S) as a reference data set for the interpretation of SE Pacific paleo-dust records. The terrigenous silt and clay fractions of 75 surface sediment samples have been investigated for their grain-size distribution and clay-mineral compositions, respectively, to identify their provenances and transport agents. Dust delivered to the southeast Pacific from the semi- to hyper-arid areas of Peru and Chile is rather fine-grained (4-8 µm) due to low-level transport within the southeast trade winds. Nevertheless, wind is the dominant transport agent and eolian material is the dominant terrigenous component west of the Peru-Chile Trench south of ~ 5°S. Grain-size distributions alone are insufficient to identify the eolian signal in marine sediments due to authigenic particle formation on the sub-oceanic ridges and abundant volcanic glass around the Galapagos Islands. Together with the clay-mineral compositions of the clay fraction, we have identified the dust lobe extending from the coasts of Peru and Chile onto Galapagos Rise as well as across the equator into the doldrums. Illite is a very useful parameter to identify source areas of dust in this smectite-dominated study area.

La Biblioteca Pública de la Universidad Nacional de La Plata, a través del tiempo

Fil: Aguado, Amelia. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

A manera de presentación

Fil: Pisarello, Rosa Zulema. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.