Mitochondria have been fundamental to the eco‐physiological success of eukaryotes since the last eukaryotic common ancestor (LECA). They contribute essential functions to eukaryotic cells, above and beyond classical respiration. Mitochondria interact with, and complement, metabolic pathways occurring in other organelles, notably diversifying the chloroplast metabolism of photosynthetic organisms. Here, we integrate existing literature to investigate how mitochondrial metabolism varies across the landscape of eukaryotic evolution. We illustrate the mitochondrial remodelling and proteomic changes undergone in conjunction with major evolutionary transitions. We (...) explore how the mitochondrial complexity of the LECA has been remodelled in specific groups to support subsequent evolutionary transitions, such as the acquisition of chloroplasts in photosynthetic species and the emergence of multicellularity. We highlight the versatile and crucial roles played by mitochondria during eukaryotic evolution, extending from its huge contribution to the development of the LECA itself to the dynamic evolution of individual eukaryote groups, reflecting both their current ecologies and evolutionary histories. (shrink)

This paper revisits the concept of affordance and explores its contribution to an understanding of the use of ICT for teaching and learning. It looks at Gibson‟s original idea of affordance and at some of the difficulties long associated with the use of the word. It goes on to describe the translation of the concept of affordance into the field of design through the work, in particular, of Norman. The concept has since been translated into research concerning ICT and further (...) opportunities and difficulties emerge. The paper locates key points of divergence within the usage of „affordance‟, as involving direct perception, invariant properties and complementarity. It concludes by arguing that affordance offers a distinctive perspective on the use of ICT in education because of its focus on possibilities for action. (shrink)

In Primitive Classification, Durkheim suggests using the notion of affectivity to explain the emergence of various social structures. This bold attempt to extend the role of affectivity in sociological thinking has been rejected by most social scientists. By greatly elaborating Durkheim's outline for a sociology of emotions, however, this essay suggests that there is a fruitful way to use affectivity in macrosociological theory. This model allows us to develop in a new way Durkheim's description of structural differentiation and stratification in (...) The Division of Labor in Society. (shrink)

This paper is an exploration of the relevance of Habermas’s social theory for understanding meaning making in the context of shared online interaction. It describes some of the key ideas within Habermas’s work, noting the central importance it gives to the idea of communicative action - a special kind of discourse in which there is ‘no other force than that of the better argument’ and no other motive other than ‘the cooperative search for truth’. The paper then turns to the (...) referencing of Habermas by educationalists in general and by supporters of online discussion in particular. It argues that a Habermasian perspective on meaning making is one in which participants strive for ‘genuine consensus’ by interrogating their own beliefs while actively engaging with opposing points of view. The value of this approach is that it introduces a concern for validity or truth into discussion of knowledge building and discriminates between emancipatory and strategic goals. While critics would argue that genuine consensus is not achievable, from Habermas we can better understand the importance of striving for such consensus. (shrink)

Concise, engaging and accessible, Education Research: The Basics discusses key ideas about the nature and purpose of education research: what it can and cannot achieve, how it has been used over the years and where and how it has had an impact. Providing crucial background for understanding key thinkers in the field such as Plato, Dewey, Montessori and Freire, each chapter represents a way of understanding the goals and methods of research conducted in the field of education. With key terms (...) and further reading throughout, this book is a must-read for anyone undertaking or interested in research in the field of education. (shrink)

KANT'S CRITIQUE OF PURE REASON: A Commentary for Students, by T. E. Wilkerson. Clarendon Press: O.U.P., 1976. ix+221 pp. £6 cloth, £2.50 paper.