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Ulrik Lögdlund 《Studies in Continuing Education》2013,35(3):183-199
This article explores videoconferencing in the context of local learning centres in Sweden. The practice is described as a ‘learning space’ in which adult learners construct socio-spatial relations. The study goes beyond a sociological apprehension of actors and opposes the idea of the material as neutral, passive and conformed by practice. On the contrary, the classroom layouts and the technical artefacts have a profound impact on interaction, communication and learning. The results of the study concern how human actors have to take on different strategies to escape the influence of material actors. It will be argued that the learning space of videoconferencing is a network of interrelations in which control is handed over from humans to material actors. In terms of learning, we may have to rethink the roles of environments and technical artifacts and reconsider such predetermined and static roles of material objects. 相似文献
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Ulrik Jørgensen 《Research Policy》2012,41(6):996-1010
Transitions of socio-technical systems imply the reconfiguration of institutions and politics making made evident the need to understand and intervene in existing patterns of growth and socio-technical practices in more sustainable directions. In recent decades, theories of transitions have been introduced, which include the multi-level approach indicating ways to govern transitions through understanding the interactions between niches, regimes and landscapes. An alternative approach is suggested, which takes its outset in arenas of development and increased awareness of actors and their way of interpreting context and performing interventions.Building on three cases covering aspects of transitions since the 1970s, the article compares the two approaches based on three concerns in relation to transition studies. The first concern reflects that conflicts are important elements of change helping actors to navigate. The second concern builds on the observation that actors engage at all levels in society including visions, institutions, and innovations. The third concern addresses the role of academic theories and advice regarding governance of transition processes in which they function as entrenched actors.The article ends by emphasising the need to help actors navigate in a field in flux. The study of arenas of development may help interpret transitions in the making, and provide a background of information about how different actors can navigate and perform strategic interventions that support sustainable transitions. 相似文献
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Veronique Colman Ulrik Persyn Daniel Daly Valere Stijnen 《Journal of sports sciences》2013,31(7):653-665
The aim of this study was to establish differences in intra-cyclic horizontal velocity variation of the body's centre of mass in breaststroke swimmers with flat and undulating styles. Vertical eel-like body waving and trunk rotations were measured to distinguish styles. To reconstruct trunk extension and kyphosis in the poorly visible zone close to the water surface, a semi-automated video-analysis system was developed. From 45 internationallevel swimmers examined, two groups of women and two groups of men were identified, those using the most undulating and those using the flattest styles. Among the men with the flattest style, the maximum and minimum horizontal velocity of the body's centre of mass differed by 76% from the mean swimming velocity; among the women with the most undulating style, the figure was 53%. In the most undulating style, less horizontal velocity variation of the body's centre of mass could be explained by movements of the body parts above the water surface, creating a transfer of momentum: a quick backward upper trunk rotation generates resistance and a quick forward shoulder girdle and upper arm movement, followed by a quick forward upper trunk and head rotation, generates propulsion. In addition, during an upward leg kick, some swimmers generated propulsion similar to that seen in eels. 相似文献
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The European Union's Waste Electrical and Electronic Equipment (WEEE) directive makes a challenging case for transition theory and its different aspects, as it represents an ongoing and still open-ended case. At present the objectives of the directive are not met: the amount of electronic waste is increasing, and the resulting waste is poorly managed. With its starting point in the multi-level perspective of transition theory, this case study analyzes how the outcome of the WEEE directive is constituted in the interplay between the somewhat detached regimes of electronics and waste management. The two regimes are described and analyzed together with the underlying regulatory principle of extended producer responsibility, which has guided the design of the directive. Conflicting interpretations of sustainability, in combination with a simplistic understanding and agency introduced from the top-down, has eliminated waste minimization as the main outcome of the directive. The concluding discussions raise the issues of the role of sustainable niche initiatives in electronics compared to multi-regime interaction. Guiding visions may need to be supplemented with other alignment devices in order to support co-evolution of regimes and coherent actions within transition processes. 相似文献
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