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Depletion of the Earth’s ozone layer is one of the major environmental concerns for the new millennium having serious implications on human health, agriculture and climate. In the past decades, research by the international scientific community has been directed towards understanding the impact of human interference on the Earth’s atmosphere. The importance of ozone radiation absorption in the atmosphere and the general kinetics of the stratospheric ozone depletion mechanisms have motivated many theoretical and experimental studies on various chemical species. The distribution of ozone and other trace gases in the atmosphere is governed by the complex interaction of dynamical, chemical and radiative processes. This article concentrates on the basic concepts underlying the problems that may be faced by humankind due to reduction in the ozone layer in coming decades, and the ways in which the scientific community can contribute to predicting and remediating these effects through design of international treaties, regulations and amendments. 相似文献
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The beliefs and attitudes of teachers are an important element in the development of inclusive education and its associated practices. Teacher education is seen as crucial in helping to develop positive attitudes and beliefs that are thought to promote inclusion, although attempts to reform teacher education in order to address issues of inclusion are complex. The paper reports the findings from a set of surveys that studied student teachers' attitudes to, and beliefs about, inclusion and exclusion at the beginning and end of a newly reformed 1‐year professional graduate diploma course at the University of Aberdeen, which places inclusion at the heart of the programme. The findings from the surveys indicate that both primary and secondary student teachers' attitudes and beliefs towards the principles of inclusive education remain positive throughout the course and are largely undiminished by school experience. This contradicts some findings that are reported elsewhere, where attitudes and beliefs become more negative following experience in schools. Findings from this study also show that attitudes, beliefs and understandings of the principles of inclusion are enhanced by consideration of the ideas underpinning ‘Learning without Limits’. 相似文献
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This paper describes how two primary head teachers, nationally recognised as role models for the development of an education for sustainable development (ESD) in their schools, manage the implementation of this area. In doing so, it shows how they adopt two very different approaches to ESD and to their job generally, and suggests that whilst there are some commonalities between them, educational leadership needs to be seen as driven by a moral purpose, engaging and re-engaging with each situation, entering into a dialectic with others’ visions, leading to the re-conceptualisation of problems in different ways. This not only suggests a continued tension between such uniqueness and standardised approaches to headship, but raises questions about current policy imperatives for developing models of sustainable leadership. 相似文献
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The creation of several forms of knowledge that would enable organizations to ask and say the right things during complex diagnoses is proposed. Based on the concept of knowledge combustion, the hypothesis testing knowledge blend (HTKB) is the cognitive equivalent of petrol for the combustion engine. The HTKB requires the creation of a knowledge hybrid that uses existing technologies to ask and say the right things. In addition to timing mechanisms and problem space maps, two forms of declarative knowledge (directions and explanations) are integrated to create the HTKB. These directions and explanations would be obtained directly from the video recordings of diagnosticians conducting teleconsultations. By providing these profound dialogues during the conduct of complex diagnoses, the HTKB should increase the knowledge capital of organizations. Formal analyses are beginning to validate the conceptual structure (blue print) presented in this paper, and the results will be provided in the future. 相似文献
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Dinosaur reconstructions have been exhibited in public for over a hundred years. During that time, scientific and public understanding of these extinct animals has changed considerably. Changes in perception have influenced and been influenced by the three-dimensional reconstructions mounted in museums and galleries, and these in turn have been influenced by the availability and use of mounting materials and techniques. The dinosaur exhibition in The Natural History Museum (NHM) in London contains examples of original, altered, and new dinosaur reconstructions that are described here—two, Gallimimus and Massospondylus, in detail. The final form of any reconstructed dinosaur is often influenced by factors beyond the control of the conservation, preparation, and mounting workers involved. 相似文献