977 resultados para Conical Intersection


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Much has been written about how space and time are integral to understanding social relations, in particular about associations between space and understanding learning in workplaces. Drawing from a research study exploring everyday learning at work, this paper looks beyond what is generally understood as work situations by turning to those spaces and times where ‘social’ and ‘work’ overlap, such as breaks in tearooms. These spaces are not so work orientated that they can be described as ‘workspaces’, nor are they entirely social. The nexus between work and the social, of being a worker and a social being, of engaging in legitimate work and socializing are put forward as rich expanses for everyday learning. The paper draws on interviews and observational data from four work sites within one organization. It undertakes an exploration of the intersection of space, time and informal learning with regard to the social/work spaces located at work. It argues that a key location for everyday learning at work is at the points of intersection between work and social spaces and that it is necessary to abandon simplistic dichotomies between work, social and learning space.

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In the study, the strengthening effect of aluminium foam in thin-walled aluminium tubes subject to bending load in investigated experimentally and numerically. Bending tests are conducted on foam filler, hollow tube and foam-filled tube. The finite element method is used as well to get deeper insight into the crush failure modes via focusing on the influence from wall thickness of the tube. The obtained information is useful to optimally design foam-filled tubes as energy absorbing devices in automotive engineering. The optimisation results can be implemented to find an optimum foam-filled tube that absorbs the same energy as the optimal hollow tube but with much less weight. © (2014) Trans Tech Publications, Switzerland.