Construyendo campos para el aprendizaje creativo. Método del juego.

Resumen basado en el de la publicación

Actores y campos : de lo científico y lo profesional.

Resumen tomado de la publicación

La integración de diferentes campos del conocimiento en juegos de simulación empresarial.

Resumen basado en el de la publicación

Educação, qualificação, trabalho e políticas públicas : campos em disputas

Este artigo trata das relações entre educação, qualificação profissional, trabalho e políticas públicas, entendidas como um assunto contemporâneo e polêmico. A sua primeira parte revisa o assunto através de um levantamento da literatura internacional, contemplada em diferentes abordagens e autores. A que segue, sistematiza o tema no cenário da realidade brasileira, nas pesquisas e publicações constantes nas áreas da educação e das ciências sociais. A última, comenta as políticas públicas de educação e qualificação implementadas no Brasil a partir dos anos 50/1950, detendo-se no momento atual. Entende-se o assunto, na contemporaneidade, como parte de um debate público tensionado pelas novas exigências internacionais e do mercado local e globalizado e pelas crises, mudanças e conquistas sociais e políticas nacionais visibilizadas a partir da década de 1980.

El impuesto al valor agregado en los contratos de campos marginales

Esta investigación dirigida por los métodos de investigación sistemático, exegético, y teleológico, pretende analizar los contratos petroleros de Campos Marginales utilizados por la legislación ecuatoriana y específicamente, el papel de Impuesto al Valor Agregado en la producción de la Curva Base; ésta, se convierte en una figura contractual innovadora que ha producido una interesante discusión a nivel nacional; sin embargo, la propuesta de este trabajo va encaminado a encontrar un mejor proceso de inversión para el Ecuador en los Campos Marginales, que le permita a nuestro país generar mayores ingresos a su favor, no solo vinculado con la generación de ingresos tributarios, sino primordialmente con las ganancias que los recursos explotados localizados en territorio nacional creen. Para cumplir con este fin, en la primera parte, hacemos una retrospectiva alrededor de los inicios de los modelos contractuales utilizados a principios del siglo veinte; a continuación, se analiza el Contrato de Campos Marginales, y sus principales componentes. En el segundo capitulo, detenemos nuestro análisis en la aplicación del Impuesto al Valor Agregado en los servicios, desde la perspectiva nacional y comunitaria (CAN), así como, exponemos el fundamento jurídico de que la “Curva Base” no es un servicio. Finalmente, en la tercera parte del estudio, analizamos al Contrato de Campos Marginales desde el punto de vista del Derecho Administrativo y observamos la posición de los actores del contrato respecto del IVA en la Curva Base de Producción. En nuestra conclusión presentamos nuestra postura sobre el IVA en el Contrato de Campos Marginales y recomendamos una nueva opción de inversión.

Hagiografía e invención en Plácido (1871), novela de Francisco Campos (Dossier: La novela ecuatoriana del siglo XIX)

Con la escritura de Plácido, novela (1871), Francisco Campos empleó la hagiografía y la retórica como una forma de articular el pensamiento para promover la acción social frente a las dificultades de su realidad. Recurrió a esta forma de escritura para difundir su mensaje y contribuir como intelectual a crear sujetos ideales para el Estado nacional.

The biometeorology of high-altitude insect layers.

Flight at high altitude is part of a migration strategy that maximises insect population displacement. This thesis represents the first substantial analysis of insect migration and layering in Europe. Vertical-looking entomological radar has revealed specific characteristics of high-altitude flight: in particular layering (where a large proportion of the migrating insects are concentrated in a narrow altitude band). The meteorological mechanisms underpinning the formation of these layers are the focus of this thesis. Aerial netting samples and radar data revealed four distinct periods of high-altitude insect migration: dawn, daytime, dusk, and night-time. The most frequently observed nocturnal profiles during the summertime were layers. It is hypothesised that nocturnal layers initiate at a critical altitude (200–500 m above ground level) and time (20:00–22:00 hours UTC). Case study analysis, statistical analysis, and a Lagrangian trajectory model showed that nocturnal insect layers probably result from the insects’ response to meteorological conditions. Temperature was the variable most correlated with nocturnal insect layer presence and intensity because insects are poikilothermic, and temperatures experienced during high-altitude migration in temperate climates are expected to be marginal for many insects’ flight. Hierarchical effects were detected such that other variables—specifically wind speed—were only correlated with insect layer presence and intensity once temperatures were warm. The trajectory model developed comprised: (i) insect flight characteristics; (ii) turbulent winds (which cause vertical spread of the layer); and (iii) mean wind speed, which normally leads to horizontal displacements of hundreds of kilometres in a single migratory flight. This thesis has revealed that there is considerable migratory activity over the UK in the summer months, and a range of fascinating phenomena can be observed (including layers). The UK has moved from one of the least studied to perhaps the best studied environments of aerial insect migration and layering in the world.

Flight periodicity and the vertical distribution of high-altitude moth migration over southern Britain

The continuous operation of insect-monitoring radars in the UK has permitted, for the first time, the characterization of various phenomena associated with high-altitude migration of large insects over this part of northern Europe. Previous studies have taken a case-study approach, concentrating on a small number of nights of particular interest. Here, combining data from two radars, and from an extensive suction- and light-trapping network, we have undertaken a more systematic, longer-term study of diel flight periodicity and vertical distribution of macro-insects in the atmosphere. Firstly, we identify general features of insect abundance and stratification, occurring during the 24-hour cycle, which emerge from four years’ aggregated radar data for the summer months in southern Britain. These features include mass emigrations at dusk and to a lesser extent at dawn, and daytime concentrations associated with thermal convection. We then focus our attention on the well-defined layers of large nocturnal migrants that form in the early evening, usually at heights of 200–500 m above ground. We present evidence from both radar and trap data that these nocturnal layers are composed mainly of noctuid moths, with species such as Noctua pronuba, Autographa gamma, Agrotis exclamationis, A. segetum, Xestia c-nigrum and Phlogophora meticulosa predominating.

Layers of nocturnal insect migrants at high-altitude: the influence of atmospheric conditions on their formation

1 Radar studies of nocturnal insect migration have often found that the migrants tend to form well-defined horizontal layers at a particular altitude. 2 In previous short-term studies, nocturnal layers were usually observed to occur at the same altitude as certain meteorological features, most notably at the altitudes of temperature inversions or nocturnal wind jets. 3 Statistical analyses are presented of four years’ data that compared the presence, sharpness and duration of nocturnal layer profiles (observed using continuously-operating entomological radar) with meteorological variables at typical layer altitudes over the UK. 4 Analysis of these large datasets demonstrated that temperature was the foremost meteorological factor persistently associated with the presence and formation of longer-lasting and sharper layers of migrating insects over southern UK.

The dependence of contrail formation on the weather pattern and altitude in the North Atlantic

Aircraft flying through cold ice-supersaturated air produce persistent contrails which contribute to the climate impact of aviation. Here, we demonstrate the importance of the weather situation, together with the route and altitude of the aircraft through this, on estimating contrail coverage. The results have implications for determining the climate impact of contrails as well as potential mitigation strategies. Twenty-one years of re-analysis data are used to produce a climatological assessment of conditions favorable for persistent contrail formation between 200 and 300 hPa over the north Atlantic in winter. The seasonal-mean frequency of cold ice-supersaturated regions is highest near 300 hPa, and decreases with altitude. The frequency of occurrence of ice-supersaturated regions varies with large-scale weather pattern; the most common locations are over Greenland, on the southern side of the jet stream and around the northern edge of high pressure ridges. Assuming aircraft take a great circle route, as opposed to a more realistic time-optimal route, is likely to lead to an error in the estimated contrail coverage, which can exceed 50% for westbound north Atlantic flights. The probability of contrail formation can increase or decrease with height, depending on the weather pattern, indicating that the generic suggestion that flying higher leads to fewer contrails is not robust.

Ground-based aerosol optical depth trends at three high-altitude sites in Switzerland and Southern Germany from 1995–2010

Ground-based aerosol optical depth (AOD) climatologies at three high-altitude sites in Switzerland (Jungfraujoch and Davos) and Southern Germany (Hohenpeissenberg) are updated and re-calibrated for the period 1995 – 2010. In addition, AOD time-series are augmented with previously unreported data, and are homogenized for the first time. Trend analysis revealed weak AOD trends (λ = 500 nm) at Jungfraujoch (JFJ; +0.007 decade-1), Davos (DAV; +0.002 decade-1) and Hohenpeissenberg (HPB; -0.011 decade-1) where the JFJ and HPB trends were statistically significant at the 95% and 90% confidence levels. However, a linear trend for the JFJ 1995 – 2005 period was found to be more appropriate than for 1995 – 2010 due to the influence of stratospheric AOD which gave a trend -0.003 decade-1 (significant at 95% level). When correcting for a recently available stratospheric AOD time-series, accounting for Pinatubo (1991) and more recent volcanic eruptions, the 1995 – 2010 AOD trends decreased slightly at DAV and HPB but remained weak at +0.000 decade-1 and -0.013 decade-1 (significant at 95% level). The JFJ 1995 – 2005 AOD time-series similarly decreased to -0.003 decade-1 (significant at 95% level). We conclude that despite a more detailed re40 analysis of these three time-series, which have been extended by five years to the end of 2010, a significant decrease in AOD at these three high-altitude sites has still not been observed.