A preferred vision for administering secondary schools: A reflective essay

As the 21st Century approaches, changes in social, political, and economic environments have been accelerating. There is a change of attitude about the educational system and its role in our society. It is my belief that our school systems will be the stable institutions which will maintain and teach the values our society will need to survive. Education has a powerful influence on our children. The responsibility of the principal of an educational institution is great

Influencia social y sostenibilidad en el uso de recursos renovables

[EN] In this paper we present a model in which we show that if the withdrawal activities referring to a renewable resource are abusive, they generate a social reaction of some kind that changes the social preferences. This change is taken into account by the social planner in deciding the optimal allocation between consumption and stock of the resource. Given these new conditions we ask how the stock of the resource in the steady state changes and what can be deduced about the chance of overuse of the resource. At the same time we compare these results to the ones obtained with traditional models which did not take social reactions into account. The conclusions obtained show that with these new conditions the stock of the steady state increases and the economy behavior becomes more conservative, diminishing the chance of overuse of the resource.[ES] En este trabajo presentamos un modelo en el que las actividades extractivas referidas a un recurso natural renovable, si son abusivas, generan algún tipo de reacción social que modifica las preferencias sociales. Esta modificación es tenida en cuenta por el planificador a la hora de decidir cual es la asignación intertemporal óptima entre consumo y stock del recurso. Bajo estas nuevas condiciones, nos preguntamos cómo cambia el stock del recurso natural en el estado estacionario y qué puede decirse acerca de la posibilidad de sobreexplotación en comparación con los modelos tradicionales en los que no se considera reacción social. Los resultados obtenidos muestran que bajo estas nuevas condiciones el stock del estado estacionario aumenta y el comportamiento de la economía se vuelve más conservacionista, disminuyendo el riesgo de sobreexplotación del recurso.Almudi, I.; Sánchez Chóliz, J. (2006). Social influence and sustainability in the use of renewable resources. Economía Agraria y Recursos Naturales - Agricultural and Resource Economics. 6(11):23-47. doi:10.7201/earn.2006.11.02SWORD234761

Implicit and explicit object recognition at very large visual eccentricities : no improvement after loss of central vision.

International audienceLittle is known about the ability of human observers to process objects in the far periphery of their visual field and nothing about its evolution in case of central vision loss. We investigated implicit and explicit recognition at two large visual eccentricities. Pictures of objects were centred at 30° or 50° eccentricity. Implicit recognition was tested through a priming paradigm. Participants (normally sighted observers and people with 10-20 years of central vision loss) categorized pictures as animal/transport both in a study phase (Block 1) and in a test phase (Block 2). In explicit recognition participants decided for each picture presented in Block 2 whether it had been displayed in Block 1 (“yes”/“no”). Both visual (identical) and conceptual/lexical (same-name) priming occurred at 30° and at 50°. Explicit recognition was observed only at 30°. In people with central vision loss testing was only performed at 50° eccentricity. The pattern of results was similar to that of normally sighted observers but global performance was lower. The results suggest that vision, at large eccentricity, is mainly based on nonconscious coarse representations. Moreover, after 10-20 years of central vision loss, no evidence was found for an increased ability to use peripheral information in object recognition