Coordinating visualizations of polysemous action: Values added for grounding proportion

We contribute to research on visualization as an epistemic learning tool by inquiring into the didactical potential of having students visualize one phenomenon in accord with two different partial meanings of the same concept. 22 Grade 4-6 students participated in a design study that investigated the emergence of proportional-equivalence notions from mediated perceptuomotor schemas. Working as individuals or pairs in tutorial clinical interviews, students solved non-symbolic interaction problems that utilized remote-sensing technology. Next, they used symbolic artifacts interpolated into the problem space as semiotic means to objectify in mathematical register a variety of both additive and multiplicative solution strategies. Finally, they reflected on tensions between these competing visualizations of the space. Micro-ethnographic analyses of episodes from three paradigmatic case studies suggest that students reconciled semiotic conflicts by generating heuristic logico-mathematical inferences that integrated competing meanings into cohesive conceptual networks. These inferences hinged on revisualizing additive elements multiplicatively. Implications are drawn for rethinking didactical design for proportions. © 2013 FIZ Karlsruhe

Clinical judgement, expertise and skilled coping

Medicine involves specific practical expertise as well as more general context-independent medical knowledge. This raises the question, what is the nature of the expertise involved? Is there a model of clinical judgement or understanding that can accommodate both elements? This paper begins with a summary of a published account of the kinds of situation-specific skill found in anaesthesia. It authors claim that such skills are often neglected because of a prejudice in favour of the ‘technical rationality’ exemplified in evidence-based medicine but they do not themselves offer a general account of the relation of practical expertise and general medical knowledge. The philosopher Hubert Dreyfus provides one model of the relation of general knowledge to situation-specific skilled coping. He claims that the former logically depends on the latter and provides two arguments, which I articulate in the second section, for this. But he mars those arguments by building in the further assumption that such situation-specific responses must be understood as concept-free and thus mindless. That assumption is held in place by three arguments all of which I criticize in the next section to give a unified account of clinical judgement as both practical and conceptually structured and thus justified in the face of a prejudice in favour of ‘technical rationality’

Embodiment and embodied design

Picture this. A preverbal infant straddles the center of a seesaw. She gently tilts her weight back and forth from one side to the other, sensing as each side tips downward and then back up again. This child cannot articulate her observations in simple words, let alone in scientific jargon. Can she learn anything from this experience? If so, what is she learning, and what role might such learning play in her future interactions in the world? Of course, this is a nonverbal bodily experience, and any learning that occurs must be bodily, physical learning. But does this nonverbal bodily experience have anything to do with the sort of learning that takes place in schools - learning verbal and abstract concepts? In this chapter, we argue that the body has everything to do with learning, even learning of abstract concepts. Take mathematics, for example. Mathematical practice is thought to be about producing and manipulating arbitrary symbolic inscriptions that bear abstract, universal truisms untainted by human corporeality. Mathematics is thought to epitomize our species’ collective historical achievement of transcending and, perhaps, escaping the mundane, material condition of having a body governed by haphazard terrestrial circumstance. Surely mathematics is disembodied

Logic in Action: Wittgenstein's Logical Pragmatism and the Impotence of Scepticism

‘The definitive version is available at www3.interscience.wiley.com '. Copyright Blackwell Publishing. DOI: 10.1111/1467-9205.00291Peer reviewe

Freedom within Nature

In drawing out the relationship between German idealism and critical theory on the question of reason’s autonomy I will concentrate on Adorno’s criticisms of transcendental idealism as it is the most sustained and detailed discussion within the critical theory tradition of the autonomy of reason. These criticisms open up for Adorno the conceptual space within which a more inclusive account reason’s autonomy might be articulated. The next section of this paper will turn to that criticism and a consideration of the new theoretical direction that the critique seems to necessitate – the direction Adorno attempts – will follow

A discrete continuity

'A discrete continuity: On the relation between research and art practice' was published by The Journal of Research Practice, a peer-reviewed journal at Athabasca University Press. This article reflects on the nature of research and art practice, which makes a case for the necessary intermingling of these activities. Research is seen as an operating structure for the process and production of, among other things, art; it is regarded as integral to the processes of thinking and making, as are curiosity, creative enquiry and critical reflection. O’Riley asserts that these processes are not necessarily discipline-specific – although particular disciplines have specific procedures and goals – and it is argued that provisionality is central to what art can offer other disciplines; it can make a virtue of incompleteness. Discussing Flusser, Deutsch and Varto among others, the article posits an expanded notion of the artwork that is essentially conditional and reliant on spectatorial involvement

A hyper-redundant manipulator

“Hyper-redundant” manipulators have a very large number of actuatable degrees of freedom. The benefits of hyper-redundant robots include the ability to avoid obstacles, increased robustness with respect to mechanical failure, and the ability to perform new forms of robot locomotion and grasping. The authors examine hyper-redundant manipulator design criteria and the physical implementation of one particular design: a variable geometry truss