Documentos del expediente de Ramón Carnicer (1830)

El compositor catalán Ramón Carnicer (1789-1855) es una de las figuras musicales mas destacadas de la España de la primera mitad del siglo XIX. Su compromiso político con el partido liberal le obligo a exiliarse repetidas veces, durante el reinado de Fernando VII. Las cartas que ha transcrit0 y estudiado Juana Rodríguez pertenecen al expediente personal del compositor, y dan fe tanto de su talante liberal y democrático, como de la atmósfera de intransigencia de la corte. El compositor catalán Ramón Carnicer (1789-1855) es una de las figuras musicales mas destacadas de la España de la primera mitad del siglo XIX. Su compromiso político con el partido liberal le obligo a exiliarse repetidas veces, durante el reinado de Fernando VII. Las cartas que ha transcrit0 y estudiado Juana Rodríguez pertenecen al expediente personal del compositor, y dan fe tanto de su talante liberal y democrático, como de la atmósfera de intransigencia de la corte

Evolution of the spherical cavity radius generated around a subsurface emitter

The emitter discharge in subsurface drip irrigation can be affected by soil properties. A positive pressure develops at the emitter outlet where a spherical cavity is assumed to form. In steady-state conditions, the pressure in the soil relates to soil hydraulic 5 properties, the emitter discharge, and the cavity radius. This pressure in the soil is very sensitive to the cavity radius. In this paper, the development of the cavity around the emitter outlet was measured for various emitter discharges in laboratory tests carried out in containers with uniform loamy soils. A trend between soil pressure and emitter discharge was established that illustrates the performance of buried emitters in the 10 field. Its application to the prediction of water distribution in subsurface drip irrigation units and its effect on the estimation of irrigation performance is also show

La toma de decisiones en los contextos escolares colaborativos.

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Water distribution in laterals and units of subsurface drip irrigation. II: Field evaluation.

The performance of drip irrigation and subsurface drip irrigation (SDI) laterals has been compared. Two emitter models (one compensating and the other noncompensating) were assessed. Field tests were carried out with a pair of laterals working at the same inlet pressure. A procedure was developed that recorded head pressures at both lateral extremes and inlet flow during irrigation. Both models showed similar behavior and soil properties affected their discharge. On the other hand, the performance of a field SDI unit of compensating emitters was characterized by measuring pressures at different points and inlet flow. Finally, the distribution of water and soil pressure in the laterals and the unit were predicted and irrigation uniformity and soil pressure variability were also determined. Predictions agreed reasonably well with the experimental observations. Thus, the methodology proposed could be used to support the decision making for the design and management of SDI system

Consecuencias legales derivadas de un accidente laboral

Traballo fin de grao (UDC.DER). Dereito. Curso 2014/201

CAMBIOS METODOLÓGICOS RELACIONADOS CON EL APRENDIZAJE DE LAS CIENCIAS

Diferentes programas que analizan la enseñanza de las ciencias como la Biología, la Química, la Física o las Matemáticas buscan explicar el bajo interés del estudiantado por esas materias. Una explicación de este fenómeno es el procedimiento metodológico que utiliza el profesorado para enseñar esas disciplinas. En este artículo, se propone que el aprendizaje significativo y la promoción de determinadas actitudes basadas en el diálogo, la discusión, la participación y la cooperación, son metodologías de enseñanza que superan el conjunto de creencias erróneas en torno a la enseñanza y el estudio de las ciencias y el conocimiento científico

Emitter discharge variability of subsurface drip irrigation in uniform soils: effect on water-application uniformity

Emitter discharge of subsurface drip irrigation (SDI) decreases as a result of the overpressure in the soil water at the discharge orifice. In this paper, the variation in dripper discharge in SDI laterals is studied. First, the emitter coefficient of flow variation CVq was measured in laboratory experiments with drippers of 2 and 4 L/h that were laid both on the soil and beneath it. Additionally, the soil pressure coefficient of variation CVhs was measured in buried emitters. Then, the irrigation uniformity was simulated in SDI and surface irrigation laterals under the same operating conditions and uniform soils; sandy and loamy. CVq was similar for the compensating models of both the surface and subsurface emitters. However, CVq decreased for the 2-L/h non-compensating model in the loamy soil. This shows a possible self-regulation of non-compensating emitter discharge in SDI, due to the interaction between effects of emitter discharge and soil pressure. This resulted in the irrigation uniformity of SDI non-compensating emitters to be greater than surface drip irrigation. The uniformity with pressure-compensating emitters would be similar in both cases, provided the overpressures in SDI are less than or equal to the compensation range lower limit

Mujer y Geografía en México.

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La mujer de Torrejón de Ardoz ante el mercado de trabajo.

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Rasgos estructurales del paro en un distrito madrileño: Carabanchel.

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