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This article is an assessment of virtual organization, a new paradigm of organization and management. Like most new ideas, virtual organization is not entirely new—some of its components are recognizable from earlier concepts of organization. However, the integration of all the components does signal something new and revolutionary. Its revolutionary character stems from the principle of switching (i.e., shifting between different means for satisfying a need), which calls upon management to maintain a logical separation between abstract requirements and the concrete means for their satisfaction. Advanced information technology makes it possible to realize virtual organization in practice, and the paradigm is clearly manifest in the operations of some innovative firms. The economic and social significance of virtual organization in the future is likely to be comparable to that of the factory in an earlier period. Properly implemented, virtual organization may deliver increases in efficiency and effectiveness on an unprecedented scale. At the same time, it may stimulate social changes at least as far‐reaching as those associated with the industrial revolution. This article provides a precise definition of virtual organization and undertakes to justify these claims about the new paradigm.  相似文献   
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An overview for college counselors of the literature on bulimia treatment outcomes is presented for purposes of screening, treatment, and referral. Pretreatment characteristics that seem amenable to success in brief therapy are outlined, as are those that do not lead to a positive outcome.  相似文献   
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Plyometric jumping is a commonly prescribed method of training focused on the development of reactive strength and high-velocity concentric power. Literature suggests that aquatic plyometric training may be a low-impact, effective supplement to land-based training. The purpose of the present study was to quantify acute, biomechanical characteristics of the take-off and flight phase for plyometric movements performed in the water. Kinetic force platform data from 12 young, male adults were collected for counter-movement jumps performed on land and in water at two different immersion depths. The specificity of jumps between environmental conditions was assessed using kinetic measures, temporal characteristics, and an assessment of the statistical relationship between take-off velocity and time in the air. Greater peak mechanical power was observed for jumps performed in the water, and was influenced by immersion depth. Additionally, the data suggest that, in the water, the statistical relationship between take-off velocity and time in air is quadratic. Results highlight the potential application of aquatic plyometric training as a cross-training tool for improving mechanical power and suggest that water immersion depth and fluid drag play key roles in the specificity of the take-off phase for jumping movements performed in the water.  相似文献   
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Reading and Writing - Educators’ content knowledge is considered a key determinant of classroom practices and thus children’s learning. In this study, we examine the nature of...  相似文献   
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Today every child in an Infant or Junior school will almost certainly watch schools’ television as part of their education. Nearly every child will watch TV at home, often for a considerable proportion of his free time. A survey of TV use in Plymouth by Plymouth Educational Television showed that in 1971 and 1972 every Infant and Junior school in that city used some TV each week. A Swedish survey in 1968 showed that most 3 year olds have begun to watch TV attentively; 90% of 3‐4 year olds usually turn on TV to watch a programme, and 75% of 5 year olds keep track of the time for a specific TV programme (Feilitzen & Linne, 1968).

In view of this widespread use of TV by young children, particularly in the educational field, it might be expected that much would be known about young children's perception and understanding of television. In fact there has been very little work done, and the research findings there are conflict. It would seem that answers to questions like — how much information does a 5 year old retain from a TV programme? What is the attention span of an infant age child? How skilled is the young child in accurately perceiving images on television? ‐‐ would be of great interest to both producers and consumers of Educational television. However, the research just does not seem to be in progress.

There is a considerable amount of relevant background information available which suggests results which might be found and this paper will review this and summarise the conclusions to be drawn.  相似文献   

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