Alfabetización semiótica en los umbrales. 16H246

Este proyecto problematiza los procesos de alfabetización en los umbrales escolares sobre la base de un enfoque semiótico a partir de conocimientos construidos en investigaciones anteriores. La profundización y sistematización de aspectos epistemológicos, teóricos y metodológicos apuntan a configurar un método de adquisición de la lengua escrita mediante el montaje/la instalación de atmósferas conversacionales en torno de protocolos de experiencias de la vida cotidiana. Considera la configuración pluriétnica y multilingüe de la jurisdicción de Misiones y las metas apuntan a resultados de interés teórico, metodológico y de incidencia en políticas públicas.

Significados e usos sociais da expertise na militancia ambientalista. En: Avá, nº 15.

Esse artigo examina os significados as lógicas sociais da utilizaçâo de recursos de expertise no ativismo ambientalista. Os procedimientos analíticos concentrarám-se numa história social do sector de protecâo ambiental e na investigaçâo da diversidade de esferas e de redes sociais articuladas ás trajetórias familiares, escolares, militantes e proffisionais dos militantes do Rio Grande do Sul. Os resultados obtidos demonstraram que os significados e a utilizaçâo da expertise no ativismo ambiental, estâo associados a padrôes distintos de reconversâo da formaçâo e do exercício profissional em diferentes esferas de actividade, com base nos vínculos anteriores e/ou simultâneos estabelecidos com redes diversificadas de organizaçôes e “movimentos sociais”.

Del PAM al PAyS: la invención de la representación del sector Agrario misionero en el Poder Legislativo de Misiones 1965- 2009. 16H285

Actividades desarrolladas durante el período: Investigación en Archivos; Etapa I Trabajo de Campo.

Quaternary calcareous nannofossils from Periantarctic basins

Currently, coccolithophores have a widespread oceanic distribution and are reported from most latitudes, but not those higher than 65°S. Fifteen piston cores were sampled with the aim of investigating the distribution and abundance variation of Quaternary calcareous nannofossils of the Antarctic region, south of the Antarctic Divergence (>65°S), particularly from Maud Rise, Bausan Bank, and from Weddell, Ross and Bellingshausen Seas. A calcareous nannofossil cold-taxa association is present in most of the cores examined and their discontinuous occurrence is thought to indicate key environmental relationships. The presence of calcareous nannofossils is correlated with interglacial intervals with warmer SSTs and may indicate high productivity and an open-ocean environment. Our results confirm that, during short periods of the late Quaternary, coccolithophorids occurred at southern high latitudes, in the western Antarctic basins, while in the eastern Antarctic basins they are nearly absent, suggesting more variable SSTs near West Antarctic Ice Sheet.

El empobrecimiento de los suelos mendocinos cultivados con manzanos

En el presente trabajo se han estudiado las pérdidas edafológicas de nitrógeno, fósforo, y potasio del suelo mendocino cultivado con manzano (Malus sylvestris MILL.). Los autores llegan a la conclusión de que durante el trienio 1945 / 1948 se han perdido: 357,65 toneladas de N₂, 96,50 toneladas de P₂ O₅ y 525,88 toneladas de K₂ O. Asimismo consignan que para restituir dichas pérdidas se debería devolver a los suelos, en forma de fertilizantes: 1778 toneladas de sulfato de amonio 536 toneladas de superfosfato de calcio 1052 toneladas de sulfato de potasio

Consolidation properties and strength characteristics of ODP Site 204-1244 sediments

Eight whole-core samples from Ocean Drilling Program Site 1244, Hydrate Ridge, Cascadia continental margin, were provided to Massachusetts Institute of Technology (Cambridge, Massachusetts, USA) for geotechnical characterization. The samples were collected from depths ranging from 5 to 136 meters below seafloor (mbsf). Seven of the eight whole-core samples were located within the gas hydrate stability zone, whereas the eighth sample was located in the free gas zone. Atterberg limits testing showed that the average liquid limit of the soil is 81% and the average plastic limit is 38%, giving an average plasticity index of 43%. The liquid limit is sensitive to oven drying, shown by a drop in liquid limit to 64% when tests were performed on an oven-dried sample. Loss on ignition averages 5.45 wt%. Constant rate of strain consolidation (CRSC) tests were performed to obtain the compression characteristics of the soil, as well as to determine the stress history of the site. CRSC tests also provided hydraulic conductivity and coefficient of consolidation characteristics for these sediments. The compression ratio (Cc) ranges from 0.340 to 0.704 (average = 0.568). Cc is fairly constant to a depth of 79 mbsf, after which Cc decreases downhole. The recompression ratio (Cr) ranges from 0.035 to 0.064 (average = 0.052). Cr is constant throughout the depth range. In situ hydraulic conductivity varies between 1.5 x 10**-7 and 3 x 10**-8 cm/s and shows no trend with depth. Ko-consolidated undrained compression/extension (CKoUC/E) tests were also performed to determine the peak undrained shear strength, stress-strain curve, and friction angle. The normalized undrained strength ranges from 0.29 to 0.35. The friction angle ranges from 27 to 37. Because of the limited amount of soil, CRSC and CKoUC/E tests were also conducted on resedimented specimens.