Sexo y ciencia a la sombra de PISA.

Resumen tomado de la publicación

Glaciation and periglaciation.

Los glaciares son uno de los agentes más poderos que modelan la superficie de los continentes. La erosión y sedimentación en ecosistemas glaciares y periglaciares crean imponentes paisajes y relieves que son valiosos recursos explotados por los hombres, desde sus habitantes a grandes empresas internacionales, a menudo de forma insostenible, degradante y convirtiéndose en una amenaza para sus ecosistemas. El libro explica los procesos físicos en ecosistemas glaciares y periglaciares, y a través de distintos casos de estudio, presenta el impacto de la actividad humana en los mismos, y la necesidad de comprender los procesos geomorfológicos y ecológicos para conseguir un desarrollo sostenible. Dirigido a estudiantes de enseñanza secundaria, incluye ejercicios de seguimiento y sugerencias para la investigación de campo.

IB Middle years programme : global issues . Project organizer 3.

Libro para alumnos del tercer curso del Programa de los Años Intermedios (PAI) del Bachillerato Internacional (IB) centrado en el aprendizaje interdisciplinar. Sus contenidos reflejan aspectos clave de la filosofía y el enfoque del programa del BI como la mentalidad internacional y la honestidad académica. Está estructurado en seis lecciones cada una sobre un tema extraído de los Objetivos de Desarrollo del Milenio acordados por Naciones Unidas (la pobreza y el hambre, conflictos y la paz, educación universal, salud y enfermedad, comercio mundial y desarrollo, sostenibilidad del medio ambiente) en relación con los recursos disponibles en el planeta. El acercamiento a cada tema se hace desde distintas materias para estructurar y facilitar el estudio interdisciplinario.

IB Middle years programme : global issues . Project organizer 4.

Libro para alumnos del cuarto curso del Programa de los Años Intermedios (PAI) del Bachillerato Internacional (IB) centrado en el aprendizaje interdisciplinar. Sus contenidos reflejan aspectos clave de la filosofía y el enfoque del programa del BI como la mentalidad internacional y la honestidad académica. Está estructurado en seis lecciones cada una sobre un tema extraído de los Objetivos de Desarrollo del Milenio acordados por Naciones Unidas (la pobreza y el hambre, conflictos y la paz, educación universal, salud y enfermedad, comercio mundial y desarrollo, sostenibilidad del medio ambiente) en relación con el tema de la población mundial y la superpoblación. El acercamiento a cada tema se hace desde distintas materias para estructurar y facilitar el estudio interdisciplinario.

IB Middle years programme : global issues . Project organizer 5.

Libro para alumnos del quinto curso del Programa de los Años Intermedios (PAI) del Bachillerato Internacional (IB) centrado en el aprendizaje interdisciplinar. Sus contenidos reflejan aspectos clave de la filosofía y el enfoque del programa del BI como la mentalidad internacional y la honestidad académica. Está estructurado en seis lecciones cada una sobre un tema extraído de los Objetivos de Desarrollo del Milenio acordados por Naciones Unidas (la pobreza y el hambre, conflictos y la paz, educación universal, salud y enfermedad, comercio mundial y desarrollo, sostenibilidad del medio ambiente) en relación con la ética, los derechos y la moral. El acercamiento a cada tema se hace desde distintas materias para estructurar y facilitar el estudio interdisciplinario.

Relações de género a nível de currículo e prática docente

Este trabalho analisa a forma com que é tratado o Currículo a partir da Prática Docente acerca do trabalho em vivência sobre temas relacionados às Relações de Gênero na Escola Estadual de Referência em Ensino Médio de Panelas – Pernambuco - Brasil. Um trabalho situado entre os estudos de Ciências da Educação, onde inicia uma reflexão sobre o conceito de gênero, onde referencia os teóricos Joan Scott, Guacira Louro, Claúdia Vianna, Sandra Unbehaum, Marion Quadros, Branca Alves, Cavaleiro, Michel Foucault, Mary Del Priore, ainda tratou do conceito de Currículo defendidos por Michael Apple, Silva, Lopes, e por fim a discussão de Prática Docente a partir da visão de Arroyo, entre outros. Foi seguido uma relação de estudos acadêmicos acerca de como cuidava-se do tema sobre Relações de Gênero no âmbito escolar ao passar dos tempos, percebendo a pouca vivência de tema de tal importância para formação sociocultural do ser, assim como um apanhado sobre a importância de se ater-se ao currículo da escola para melhor desenvoltura por parte do professor, foram discutidos os vários significados do que venha a ser a formação cultural do ser homem e mulher a partir de uma comparação da sociedade mais antiga até os dias atuais, a importância de incluir no currículo escolar temas como Relações de Gênero e como vinha sendo a prática docente a cerca destes assuntos. A pesquisa teve um caráter qualitativo e quantitativo, desenvolvida em uma escola estadual da cidade de Panelas – Pernambuco, durante os anos de 2011 e 2012. Os dados para a realização empírica foram obtidos por meio de questionários aplicados aos estudantes e por meio de entrevistas junto aos educadores. A grande importância de ater-se aos dados gerados a partir da participação dos sujeitos, deu-se a condição de questionamentos de como estava sendo aplicado o trabalho referente a relações de gênero na escola, sobre a prática docente e como era a vivência do currículo neste ensejo. Desta forma, tento mostrar que os estudos de gênero podem instigar o cidadão a conhecer e compreender a necessidade deste trabalho sobre relações de gênero para a formação cultural do cidadão, e perceber a falta de formação do docente, para que se possa dar o devido valor à construção da educação.

Developing pragmatic skills at the pre-school level: a case study

This paper reviews a study undertaken to develop activities to help teach communicative functions of language.

Crop type influences edge effects on the reproduction of songbirds in sagebrush habitat near agriculture

Extensive fragmentation of the sagebrush shrubsteppe of western North America could be contributing to observed population declines of songbirds in sagebrush habitat. We examined whether habitat fragmentation impacts the reproduction of songbirds in sagebrush edge habitat near agriculture, and if potential impacts vary depending on the adjacent crop type. Specifically, we evaluated whether nest abundance and nest survival varied between orchard edge habitat, vineyard edge habitat, and interior habitat. We then examined whether the local nest predator community and vegetation could explain the differences detected. We detected fewer nests in edge than interior habitat. Nest abundance per songbird was also lower in edge than interior habitat, although only adjacent to vineyards. Nest predation was more frequent in orchard edge habitat than vineyard edge or interior habitat. Predators identified with nest cameras were primarily snakes, however, reduced nest survival in orchard edge habitat was not explained by differences in the abundance of snakes or any other predator species identified. Information theoretic analysis of daily survival rates showed that greater study plot shrub cover and lower grass height at nests were partially responsible for the lower rate of predation-specific daily nest survival rate (PDSR) observed in orchard edge habitat, but additional factors are likely important. Results of this study suggest that different crop types have different edge effects on songbirds nesting in sagebrush shrubsteppe, and that these reproductive edge effects may contribute to observed declines of these species. Habitat managers should avoid the creation of new orchard-sagebrush habitat edges to avoid further impacts on already declining songbird populations.

Temperature- and Pressure-induced Proton Transfer in the 1:1 Adduct Formed between Squaric Acid and 4,4 '-Bipyridine

We have applied a combination of spectroscopic and diffraction methods to study the adduct formed between squaric acid and bypridine, which has been postulated to exhibit proton transfer associated with a single-crystal to single-crystal phase transition at ca. 450 K. A combination of X-ray single-crystal and very-high flux powder neutron diffraction data confirmed that a proton does transfer from the acid to the base in the high-temperature form. Powder X-ray diffraction measurements demonstrated that the transition was reversible but that a significant kinetic energy barrier must be overcome to revert to the original structure. Computational modeling is consistent with these results. Modeling also revealed that, while the proton transfer event would be strongly discouraged in the gas phase, it occurs in the solid state due to the increase in charge state of the molecular ions and their arrangement inside the lattice. The color change is attributed to a narrowing of the squaric acid to bipyridine charge-transfer energy gap. Finally, evidence for the possible existence of two further phases at high pressure is also presented.

Illustration of micro-scale advection using grid-pattern mini-lysimeters

Twenty-five small soil-filled perspex boxes arranged in a square, with dwarf sunflowers growing in them, were used to study micro-scale advection. Hydrological heterogeneity was introduced by applying two different amounts of irrigation water (low-irrigation, L, versus high-irrigation, H). The nine central boxes (4 H, 4 L and I bare box) were precision weighing lysimeters, yielding diurnal measurements of evaporation. After the onset of soil water stress, a large difference in latent heat flux (up to 4-fold) was observed between the lysimeters of the H and L treatments, mainly caused by large differences between H and L stomatal conductance values. This resulted in micro-advection, causing H soil-sunflower systems to evaporate well above equilibrium latent heat flux. The occurrence of micro-advective enhancement was reflected in large values of the Priestley-Taylor constant (often larger than 2.0) and generally negative values of sensible heat flux for the H treatment. (c) 2005 Elsevier B.V. All rights reserved.

Thermal expansion of deuterated hopeite, Zn-3(PO4)(2)center dot 4D(2)O

The lattice parameters extracted from Lebail analysis of neutron powder diffraction data collected between 2 and 300 K have been used to calculate the temperature evolution of the thermal expansion tensor for hopeite, Zn-3(PO4)(2)center dot 2H(2)O, Pnma,Z=4with a= 10.6065(4) angstrom, b = 18.2977(4) angstrom, c= 5.0257(2) A at 275 K. The a lattice parameter shows a negative thermal expansion, the b lattice parameter appears to saturate at 275 K while the c lattice parameter has a more typical positive thermal expansion. At 275 K, the magnitudes of the thermal expansion coefficients are alpha(a) = -1. 1(4) x 10(-5) K-1, alpha(b) = 2.4(9) x 10(-6) K-1 and alpha(c) = 3.6(2) x 10(-1) K-1. Under the conditions of these experiments, hopeite begins to dehydrate to the dihydrate between 300 and 325 K, and between 480 and 500 K the monohydrate is formed. The thermal expansion of the dihydrate has been calculated between 335 and 480 and at 480 K the magnitudes of the thermal expansion coefficients are alpha(a) = 1(2) x 10(-5) K-1, alpha(b) = 4(l) x 10(-6) K-1, alpha(c) = 4(2) x 10(-5) K-1, alpha(beta) = 1 (1) x 10(-1) K-1, and alpha(v) = 2(2) x 10(-1) K-1. The thermal expansion of hopeite is described in terms of its crystal structure and possible dehydration mechanisms for the alpha and beta modifications of hopeite are discussed.

Adsorption of water vapor by bare soil in an olive grove in southern Spain

Data for water vapor adsorption and evaporation are presented for a bare soil (sandy loam, clay content 15%) in a southern Spanish olive grove. Water losses and gains were measured using eight high-precision minilysimeters, placed around an olive tree, which had been irrigated until the soil reached field capacity (similar to 0.22 m(3) m(-3)). They were subsequently left to dry for 10 days. A pair of lysimeters was situated at each of the main points of the compass (N, E, S, W), at a distance of 1 m (the inner set of lysimeters; ILS) and 2 m (the outer set of lysimeters; OLS), respectively, from the tree trunk. Distinct periods of moisture loss (evaporation) and moisture gain (vapor adsorption) could be distinguished for each day. Vapor adsorption often started just after noon and generally lasted until the (early) evening. Values of up to 0.7 mm of adsorbed water per day were measured. Adsorption was generally largest for the OLS (up to 100% more on a daily basis), and increased during the dry down. This was mainly the result of lower OLS surface soil moisture contents (period-average absolute difference similar to 0.005 m(3) m(-3)), as illustrated using various analyses employing a set of micrometeorological equations describing the exchange of water vapor between bare soil and the atmosphere. These analyses also showed that the amount of water vapor adsorbed by soils is very sensitive to changes in atmospheric forcing and surface variables. The use of empirical equations to estimate vapor adsorption is therefore not recommended.

Thermopile radiometer signal conditioning for surface atmospheric radiation measurements

A highly stable microvolt amplifier for use with atmospheric broadband thermopile radiometers is described. The amplifier has a nominal gain of 500, for bipolar input signals in the range +/- 10 mV from a floating source. The noise level at the input is less than 5 mu V (at 100 k Omega input impedance), permitting instantaneous diffuse solar radiation measurements to 0.5 W m(-2) resolution with 12 bit analog to digital conversion. The temperature stability of gain is better than 5 ppm/degrees C (-4 to 20 degrees C). Averaged over a decade of use, the long term drift of the amplifier gain is less than similar to 0.02%/yr. As well as radiometers measuring solar and terrestrial radiations, the amplifier has also been successfully used with low level signals from thermocouples and ground heat flux plates.