999 resultados para Polk, R. L.
Resumo:
Se transcribe un repertorio bibliográfico de los Doctores Plancke y Veremans sobre publicaciones clásicas, titulado Documentatio didactica classica. El repertorio data de 1966 e incluye monografÃas organizadas en función de su temática, publicaciones periódicas y materiales audiovisuales.
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Se abordan los reglamentos, selección, financiación de la Investigación y observaciones generales acerca de la obtención del grado de Doctor en las Universidades inglesas.
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Este artÃculo pertenece a una sección de la revista dedicada a propuestas didácticas. - Incluye recursos web. - A modo de anexo se incluyen las fichas desarrolladas para la realización de la actividad por parte del alumnado. - Resumen tomado parcialmente de la revista
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Con este trabajo se pretende ver las diferencias existentes en la forma de evolución entre niñas de igual edad educadas en un ambiente urbano y en un ambiente rural.. Niñas de 11 a 17 años, de población ruaral y urbana.. estudio experimental.. cuestionarios del Catálogo de problemas personales de R.L. Mooney.. Gráficas, estadÃstica.. Los resultados a los que se ha llegado son los siguientes. Existe una mayor preocupación, en general, por los problemas en el ambiente urbano que en el rural. Esto puede ser debido a que los adolescentes que se desenvuelven en un medio urbano tienen más alicientes que los que se desenvuelven en un medio rural. Los problemas que presentan mayor interés son los referentes a la forma de comportarse con los chicos, las relaciones con ellos, etc. Esto puede ser debido a que la niña está descubriendo el interés hacia el otro sexo y por ello ahora es lo que más le interesa. la problemática de menor interés se refiere a la forma de interrelacionarse dentro de los diferentes grupos y formas sociales. Esto puede ser debeido a que los adolescentes no captaron bien el contenido de estos problemas..
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Analizar estadÃsticamente la problemática social y económico familiar de la adolescente española. 202 sujetos de edades entre 11 y 19 años de Salamanca. Cuestionario de R. L. Mooney (catálogo de problemas personales). frecuencias. El trabajo ha confirmado las ideas que tenÃamos sobre las adolescentes y su problemática, ideas procedentes de: los libros, la experiencia personal, y el trabajo que las ha confirmado. La validez de los porcentajes de los problemas hacen que se confirmen unos a otros, puesto que, tratándose de grupos diferentes por edades, sin embargo los porcentajes apenas se diferencian entre sà y los fenómenos van evolucionando muy lentamente, pero progresivamente. Se advierte en general que los problemas de rebeldÃa, crisis, libertad, se dan casi todos entre los 15 y 16 años. Los problemas de timidez y de relación social aparecen a los 13 y 14 años, que es cuando la chica cobra conciencia de su papel social y su intervención en el grupo. A los 19 años todas las gráficas tienden a bajar. Ello se debe no tanto a la madurez, que de hecho no se producirÃa en un sólo año, sino que la muestra de los 19 años ha sido completado en un 60 por ciento por muchachas universitarias de ambiente salmantino, donde el régimen de vida de colegios mayores hace desaparecer la mitad de los problemas que tienen otras chicas en el ambiente familiar en que se mueven. En ese sentido la caÃda de los 19 años es más artificial que real y no se puede dar un valor definitivo como lo hacemos con las demás edades.
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The purpose of this work is determine the extent of closure between measurements and models of UV irradiances at diverse sites using state of the art instruments, models, and the best available data as inputs to the models. These include information about aerosol optical depth (unfortunately not extending down as far into the UVB region as desirable because such information is not generally available), ozone column amounts, as well as vertical profiles of temperature. We concentrate on clear-sky irradiances, and report the results in terms of UV Index (UVI)
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Presenta las reseñas de los siguientes libros: Alfredo BenÃtez Rivas, Derecho tributario. El Código tributario boliviano desde la perspectiva de diversas doctrinas jurÃdicas, La Paz, Azul Editores, 2009, 453 pp. -- Programa Andino de Derechos Humanos, ¿Estado constitucional de derechos? informe sobre derechos humanos Ecuador 2009, Quito, Universidad Andina Simón BolÃvar, Sede Ecuador/Programa Andino de Derechos Humanos, PADH/Abya-Yala, 2010, 529 pp. -- João Bosco Coelho Pasin, Derecho tributario y ética, Buenos Aires, Editorial Heliasta S.R.L., 2010, 272 pp.
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The reliability of the global reanalyses in the polar regions is investigated. The overview stems from an April 2006 Scientific Committee on Antarctic Research (SCAR) workshop on the performance of global reanalyses in high latitudes held at the British Antarctic Survey. Overall, the skill is much higher in the Arctic than the Antarctic, where the reanalyses are only reliable in the summer months prior to the modern satellite era. In the Antarctic, large circulation differences between the reanalyses are found primarily before 1979, when vast quantities of satellite sounding data started to be assimilated. Specifically for ERA-40, this data discontinuity creates a marked jump in Antarctic snow accumulation, especially at high elevations. In the Arctic, the largest differences are related to the reanalyses depiction of clouds and their associated radiation impacts; ERA-40 captures the cloud variability much better than NCEP1 and JRA-25, but the ERA-40 and JRA-25 clouds are too optically thin for shortwave radiation. To further contrast the reanalyses skill, cyclone tracking results are presented. In the Southern Hemisphere, cyclonic activity is markedly different between the reanalyses, where there are few matched cyclones prior to 1979. In comparison, only some of the weaker cyclones are not matched in the Northern Hemisphere from 1958-2001, again indicating the superior skill in this hemisphere. Although this manuscript focuses on deficiencies in the reanalyses, it is important to note that they are a powerful tool for climate studies in both polar regions when used with a recognition of their limitations.
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It is now accepted that some human-induced climate change is unavoidable. Potential impacts on water supply have received much attention, but relatively little is known about the concomitant changes in water quality. Projected changes in air temperature and rainfall could affect river flows and, hence, the mobility and dilution of contaminants. Increased water temperatures will affect chemical reaction kinetics and, combined with deteriorations in quality, freshwater ecological status. With increased flows there will be changes in stream power and, hence, sediment loads with the potential to alter the morphology of rivers and the transfer of sediments to lakes, thereby impacting freshwater habitats in both lake and stream systems. This paper reviews such impacts through the lens of UK surface water quality. Widely accepted climate change scenarios suggest more frequent droughts in summer, as well as flash-flooding, leading to uncontrolled discharges from urban areas to receiving water courses and estuaries. Invasion by alien species is highly likely, as is migration of species within the UK adapting to changing temperatures and flow regimes. Lower flows, reduced velocities and, hence, higher water residence times in rivers and lakes will enhance the potential for toxic algal blooms and reduce dissolved oxygen levels. Upland streams could experience increased dissolved organic carbon and colour levels, requiring action at water treatment plants to prevent toxic by-products entering public water supplies. Storms that terminate drought periods will flush nutrients from urban and rural areas or generate acid pulses in acidified upland catchments. Policy responses to climate change, such as the growth of bio-fuels or emission controls, will further impact freshwater quality.
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The NERC UK SOLAS-funded Reactive Halogens in the Marine Boundary Layer (RHaMBLe) programme comprised three field experiments. This manuscript presents an overview of the measurements made within the two simultaneous remote experiments conducted in the tropical North Atlantic in May and June 2007. Measurements were made from two mobile and one ground-based platforms. The heavily instrumented cruise D319 on the RRS Discovery from Lisbon, Portugal to São Vicente, Cape Verde and back to Falmouth, UK was used to characterise the spatial distribution of boundary layer components likely to play a role in reactive halogen chemistry. Measurements onboard the ARSF Dornier aircraft were used to allow the observations to be interpreted in the context of their vertical distribution and to confirm the interpretation of atmospheric structure in the vicinity of the Cape Verde islands. Long-term ground-based measurements at the Cape Verde Atmospheric Observatory (CVAO) on São Vicente were supplemented by long-term measurements of reactive halogen species and characterisation of additional trace gas and aerosol species during the intensive experimental period. This paper presents a summary of the measurements made within the RHaMBLe remote experiments and discusses them in their meteorological and chemical context as determined from these three platforms and from additional meteorological analyses. Air always arrived at the CVAO from the North East with a range of air mass origins (European, Atlantic and North American continental). Trace gases were present at stable and fairly low concentrations with the exception of a slight increase in some anthropogenic components in air of North American origin, though NOx mixing ratios during this period remained below 20 pptv. Consistency with these air mass classifications is observed in the time series of soluble gas and aerosol composition measurements, with additional identification of periods of slightly elevated dust concentrations consistent with the trajectories passing over the African continent. The CVAO is shown to be broadly representative of the wider North Atlantic marine boundary layer; measurements of NO, O3 and black carbon from the ship are consistent with a clean Northern Hemisphere marine background. Aerosol composition measurements do not indicate elevated organic material associated with clean marine air. Closer to the African coast, black carbon and NO levels start to increase, indicating greater anthropogenic influence. Lower ozone in this region is possibly associated with the increased levels of measured halocarbons, associated with the nutrient rich waters of the Mauritanian upwelling. Bromide and chloride deficits in coarse mode aerosol at both the CVAO and on D319 and the continuous abundance of inorganic gaseous halogen species at CVAO indicate significant reactive cycling of halogens. Aircraft measurements of O3 and CO show that surface measurements are representative of the entire boundary layer in the vicinity both in diurnal variability and absolute levels. Above the inversion layer similar diurnal behaviour in O3 and CO is observed at lower mixing ratios in the air that had originated from south of Cape Verde, possibly from within the ITCZ. ECMWF calculations on two days indicate very different boundary layer depths and aircraft flights over the ship replicate this, giving confidence in the calculated boundary layer depth.
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The improved empirical understanding of silt facies in Holocene coastal sequences provided by such as diatom, foraminifera, ostracode and testate amoebae analysis, combined with insights from quantitative stratigraphic and hydraulic simulations, has led to an inclusive, integrated model for the palaeogeomorphology, stratigraphy, lithofacies and biofacies of northwest European Holocene coastal lowlands in relation to sea-level behaviour. The model covers two general circumstances and is empirically supported by a range of field studies in the Holocene deposits of a number of British estuaries, particularly, the Severn. Where deposition was continuous over periods of centuries to millennia, and sea level fluctuated about a rising trend, the succession consists of repeated cycles of silt and peat lithofacies and biofacies in which series of transgressive overlaps (submergence sequences) alternate with series of regressive overlaps (emergence sequences) in association with the waxing and waning of tidal creek networks. Environmental and sea-level change are closely coupled, and equilibrium and secular pattern is of the kind represented ideally by a closed limit cycle. In the second circumstance, characteristic of unstable wetland shores and generally affecting smaller areas, coastal erosion ensures that episodes of deposition in the high intertidal zone last no more than a few centuries. The typical response is a series of regressive overlaps (emergence sequence) in erosively based high mudflat and salt-marsh silts that record, commonly as annual banding, exceptionally high deposition rates and a state of strong disequilibrium. Environmental change, including creek development, and sea-level movement are uncoupled. Only if deposition proceeds for a sufficiently long period, so that marshes mature, are equilibrium and close coupling regained. (C) 2002 Elsevier Science B.V. All rights reserved.
Chapel (Tump) Farm, Undy, Caldicot Level: an intertidal secondary medieval site and its implications