Proyecto de innovación educativa: límite y continuidad

Se explica un proyecto sencillo de innovación educativa para introducir de manera intuitiva la caracterización épsilon-delta de límite a estudiantes de bachillerato.

SIDI SIFR. Proyecto de animación a la lectura y educación en valores desde el área de matemáticas

En la sociedad actual la educación en valores y el fomento a la lectura, entre el alumnado de la enseñanza secundaria, tiene una singular importancia. Con este trabajo, desde el área de matemáticas y de modo interdisciplinar, hemos querido contribuir al enriquecimiento de nuestro alumnado para analizar y valorar fenómenos sociales como la diversidad cultural, la igualdad entre los sexos o la convivencia pacífica, desarrollando simultáneamente contenidos específicos de las distintas disciplinas desde las cuales puede ser analizada la lectura de El señor del cero.

Proyecto cube: una introducción a la geometría tridimensional

El proyecto CUBE es una propuesta de trabajo en el aula de Matemáticas donde a partir de la película CUBE (Vincenzo Natali, 1997) se desarrollan una serie de actividades introductorias a la Geometría Analítica tridimensional y a la visualización espacial geométrica. Consta de dos partes, una relativa al guión de la película y otra derivada hacia el desarrollo del currículo de 4º de ESO en el bloque de Geometría. Las características de la propuesta hacen que se presente como un proyecto abierto a la interdisciplinariedad e idóneo para la práctica del aprendizaje significativo en un contexto de prácticas procedimentales.

Las matemáticas en el proyecto de reforma de la comunidad valenciana

La propuesta de reforma del sistema educativo ha proporcionado la oportunidad de: plantear a fondo cómo debe ser la enseñanza no universitaria, constituir y formar equipos técnicos, elaborar nuevas propuestas teóricas, elaborar materiales acordes a las nuevas propuestas didácticas, plantear la formación de profesorado como necesidad acuciante (inicial y permanente).

Towards improved socio-economic assessments of ocean acidification’s impacts

Ocean acidification is increasingly recognized as a component of global change that could have a wide range of impacts on marine organisms, the ecosystems they live in, and the goods and services they provide humankind. Assessment of these potential socio-economic impacts requires integrated efforts between biologists, chemists, oceanographers, economists and social scientists. But because ocean acidification is a new research area, significant knowledge gaps are preventing economists from estimating its welfare impacts. For instance, economic data on the impact of ocean acidification on significant markets such as fisheries, aquaculture and tourism are very limited (if not non-existent), and non-market valuation studies on this topic are not yet available. Our paper summarizes the current understanding of future OA impacts and sets out what further information is required for economists to assess socio-economic impacts of ocean acidification. Our aim is to provide clear directions for multidisciplinary collaborative research.

Recovery or decline of the Northwestern Black Sea: A societal choice revealed by socio-ecological modelling

During recent decades anthropogenic activities have dramatically impacted the Black Sea ecosystem. High levels of riverine nutrient input during the 1970s and 1980s caused eutrophic conditions including intense algal blooms resulting in hypoxia and the subsequent collapse of benthic habitats on the northwestern shelf. Intense fishing pressure also depleted stocks of many apex predators, contributing to an increase in planktivorous fish that are now the focus of fishing efforts. Additionally, the Black Sea's ecosystem changed even further with the introduction of exotic species. Economic collapse of the surrounding socialist republics in the early 1990s resulted in decreased nutrient loading which has allowed the Black Sea ecosystem to start to recover, but under rapidly changing economic and political conditions, future recovery is uncertain. In this study we use a multidisciplinary approach to integrate information from socio-economic and ecological systems to model the effects of future development scenarios on the marine environment of the northwestern Black Sea shelf. The Driver–Pressure–State-Impact-Response framework was used to construct conceptual models, explicitly mapping impacts of socio-economic Drivers on the marine ecosystem. Bayesian belief networks (BBNs), a stochastic modelling technique, were used to quantify these causal relationships, operationalise models and assess the effects of alternative development paths on the Black Sea ecosystem. BBNs use probabilistic dependencies as a common metric, allowing the integration of quantitative and qualitative information. Under the Baseline Scenario, recovery of the Black Sea appears tenuous as the exploitation of environmental resources (agriculture, fishing and shipping) increases with continued economic development of post-Soviet countries. This results in the loss of wetlands through drainage and reclamation. Water transparency decreases as phytoplankton bloom and this deterioration in water quality leads to the degradation of coastal plant communities (Cystoseira, seagrass) and also Phyllophora habitat on the shelf. Decomposition of benthic plants results in hypoxia killing flora and fauna associated with these habitats. Ecological pressure from these factors along with constant levels of fishing activity results in target stocks remaining depleted. Of the four Alternative Scenarios, two show improvements on the Baseline ecosystem condition, with improved waste water treatment and reduced fishing pressure, while the other two show a worsening, due to increased natural resource exploitation leading to rapid reversal of any recent ecosystem recovery. From this we conclude that variations in economic policy have significant consequences for the health of the Black Sea, and ecosystem recovery is directly linked to social–economic choices.

Effect of supplementation silage ("Festuca dolichophylla, Avena sativa and Vicia sativa") on weight gain and mortality in adult alpacas ("Vicugna pacos")

This study was conducted in order to evaluate the effect of supplementation with silage (Festuca dolichophylla, Avena sativa and Vicia sativa) on weight gain and mortality in adult alpacas, during the months of dry season (June to August) in Huancavelica region. 300 female alpacas 3 and 4 years of age (physiological state: pregnant) were used, which were assigned to the following treatments: SP, grazing only PSE15, grazing plus supplementation of 1.5 kg of silage. Alpacas were supplemented once daily. In each alpaca they were recorded live weight at the beginning and end of the experiment. The weight gain was -0.02 y 2.05 kg for SP and PSE15 respectively (p <0.001) treatments. Mortality was 5.3% and 2.7% for SP and PSE15 respectively (p=0.073) treatments. It can be concluded under the conditions of this trial silage supplementation has effect on weight gain and maybe also on mortality in alpacas.