959 resultados para didactic experiment
Resumo:
Un rasgo inusual de la estrategia didáctica de Hesíodo en Trabajos y Días es la inclusión de su hermano Perses, como destinatario. Si existe o no una base histórica para la disputa financiera entre hermanos, tal como aparece representada en el poema, resulta menos interesante que la posición que tal situación (posiblemente ficcional) transmite. Por la figura del consejero, Hesíodo sostiene, naturalmente, una actitud diferente hacia un hermano, que la que quisiera si su aconsejado fuera un hijo, un futuro rey, o un estudiante -roles que son más típicos en las tradiciones didácticas de la literatura universal. Este artículo explora las tensiones, resonancias míticas y ambigüedades inherentes a la elección de la figura del hermano como recipiendario del consejo y concluye que esta particular configuración didáctica provee una más abierta-conclusiva y aceptable entrada a través de la cual cualquier audiencia puede interactuar con la tradición de sabiduría atesorada en el verso hesiódico.
Resumo:
Un rasgo inusual de la estrategia didáctica de Hesíodo en Trabajos y Días es la inclusión de su hermano Perses, como destinatario. Si existe o no una base histórica para la disputa financiera entre hermanos, tal como aparece representada en el poema, resulta menos interesante que la posición que tal situación (posiblemente ficcional) transmite. Por la figura del consejero, Hesíodo sostiene, naturalmente, una actitud diferente hacia un hermano, que la que quisiera si su aconsejado fuera un hijo, un futuro rey, o un estudiante -roles que son más típicos en las tradiciones didácticas de la literatura universal. Este artículo explora las tensiones, resonancias míticas y ambigüedades inherentes a la elección de la figura del hermano como recipiendario del consejo y concluye que esta particular configuración didáctica provee una más abierta-conclusiva y aceptable entrada a través de la cual cualquier audiencia puede interactuar con la tradición de sabiduría atesorada en el verso hesiódico.
Resumo:
This data set contains measurements of dissolved organic carbon in samples of soil water collected from the main experiment plots of a large grassland biodiversity experiment (the Jena Experiment; see further details below). In the main experiment, 82 grassland plots of 20 x 20 m were established from a pool of 60 species belonging to four functional groups (grasses, legumes, tall and small herbs). In May 2002, varying numbers of plant species from this species pool were sown into the plots to create a gradient of plant species richness (1, 2, 4, 8, 16 and 60 species) and functional richness (1, 2, 3, 4 functional groups). Plots were maintained by bi-annual weeding and mowing. In April 2002 glass suction plates with a diameter of 12 cm, 1 cm thickness and a pore size of 1-1.6 mm (UMS GmbH, Munich, Germany) were installed in depths of 10, 20, 30 and 60 cm to collect soil solution. The sampling bottles were continuously evacuated to a negative pressure between 50 and 350 mbar, such that the suction pressure was about 50 mbar above the actual soil water tension. Thus, only the soil leachate was collected. Cumulative soil solution was sampled biweekly and analyzed for dissolved organic carbon concentration by a high TOC elemental analyzer (Elementar Analysensysteme GmbH, Hanau, Germany). Samples were analyzed as soon as possible and stored at 4°C if necessary. Often in summer, no free soil solution was available for collection, especially in the upper soil layers. Annual mean values of measured biweekly concentrations of dissolved organic carbon are provided.
Resumo:
This data set contains measurements of dissolved organic carbon in samples of soil water collected from the main experiment plots of a large grassland biodiversity experiment (the Jena Experiment; see further details below). In the main experiment, 82 grassland plots of 20 x 20 m were established from a pool of 60 species belonging to four functional groups (grasses, legumes, tall and small herbs). In May 2002, varying numbers of plant species from this species pool were sown into the plots to create a gradient of plant species richness (1, 2, 4, 8, 16 and 60 species) and functional richness (1, 2, 3, 4 functional groups). Plots were maintained by bi-annual weeding and mowing. In April 2002 glass suction plates with a diameter of 12 cm, 1 cm thickness and a pore size of 1-1.6 mm (UMS GmbH, Munich, Germany) were installed in depths of 10, 20, 30 and 60 cm to collect soil solution. The sampling bottles were continuously evacuated to a negative pressure between 50 and 350 mbar, such that the suction pressure was about 50 mbar above the actual soil water tension. Thus, only the soil leachate was collected. Cumulative soil solution was sampled biweekly and analyzed for dissolved organic carbon concentration by a high TOC elemental analyzer (Elementar Analysensysteme GmbH, Hanau, Germany). Samples were analyzed as soon as possible and stored at 4°C if necessary. Often in summer, no free soil solution was available for collection, especially in the upper soil layers. Annual mean values of measured biweekly concentrations of dissolved organic carbon are provided.
Resumo:
This data set contains measurements of dissolved organic carbon in samples of soil water collected from the main experiment plots of a large grassland biodiversity experiment (the Jena Experiment; see further details below). In the main experiment, 82 grassland plots of 20 x 20 m were established from a pool of 60 species belonging to four functional groups (grasses, legumes, tall and small herbs). In May 2002, varying numbers of plant species from this species pool were sown into the plots to create a gradient of plant species richness (1, 2, 4, 8, 16 and 60 species) and functional richness (1, 2, 3, 4 functional groups). Plots were maintained by bi-annual weeding and mowing. In April 2002 glass suction plates with a diameter of 12 cm, 1 cm thickness and a pore size of 1-1.6 mm (UMS GmbH, Munich, Germany) were installed in depths of 10, 20, 30 and 60 cm to collect soil solution. The sampling bottles were continuously evacuated to a negative pressure between 50 and 350 mbar, such that the suction pressure was about 50 mbar above the actual soil water tension. Thus, only the soil leachate was collected. Cumulative soil solution was sampled biweekly and analyzed for dissolved organic carbon concentration by a high TOC elemental analyzer (Elementar Analysensysteme GmbH, Hanau, Germany). Samples were analyzed as soon as possible and stored at 4°C if necessary. Often in summer, no free soil solution was available for collection, especially in the upper soil layers. Annual mean values of measured biweekly concentrations of dissolved organic carbon are provided.