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排序方式: 共有133条查询结果,搜索用时 15 毫秒
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Luiz Carlos Hespanhol Junior Aline Carla Araújo de Carvalho Leonardo Oliveira Pena Costa 《European Journal of Sport Science》2016,16(8):1137-1144
There is conflicting evidence on the association between lower limb alignment characteristics and the incidence of running-related injury (RRI). Therefore, the primary aim of this study was to investigate the association between lower limb alignment characteristics and the incidence proportion of RRI in a convenience sample of recreational runners. A total of 89 recreational runners were included in this prospective cohort study. These participants had been running for at least six months and were injury-free at baseline. Lower limb alignment measurements were conducted in order to calculate lower limb discrepancy, Q-angle, subtalar angle and plantar index. All participants also answered a baseline and biweekly online surveys about their running routine, history of RRI and newly developed RRI over a period of 12 weeks. The prevalence of previous RRI and the 12-week incidence proportion of new RRI were calculated. Logistic regression analysis was performed to estimate the association between lower limb length discrepancy, Q-angle, subtalar angle and plantar ach index with the incidence proportion of RRI. The prevalence of previous RRI was 55.1% (n?=?49). The 12-week incidence proportion of new RRI was 27.0% (n?=?24). Muscle injuries and tendinopathies were the main types of RRI identified. The lower leg and the knee were the main anatomical regions affected. We did not find significant associations between lower limb length discrepancy, Q-angle, subtalar angle and plantar arch index and injury occurrence. 相似文献
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Giselle Martins dos Santos Ferreira Luiz Alexandre da Silva Rosado Márcio Silveira Lemgruber Jaciara de Sá Carvalho 《Learning, Media and Technology》2020,45(1):46-60
ABSTRACTThis article discusses issues concerning the spread of data-driven educational technologies in Brazil. Here, as elsewhere, educational technology continues to be promoted optimistically as the bearer of a panacea for historically-rooted social problems. Whilst some of these technologies have indeed contributed to important widening-participation programmes in the last two decades, widespread advocacy of technological ‘solutionism’, reflected in gradually stronger policy demands for efficiencies to be improved through ‘innovation’, has supported a relentless marketisation of the country’s educational systems. As transnational corporations position themselves to take control of key areas of these systems, threatening to restructure the whole sector, data-driven educational technologies provide the latest example in a series of ‘new’ ideas offered in an ever-expanding market. Based on the notion of ‘conceptual metaphors’, which encapsulate specific ways of perceiving, thinking and relating with the world, this article examines key metaphors underpinning discourses surrounding data-driven educational technologies in Brazil. In particular, the article analyses ways in which these specific metaphors may be promoting perspectives that ignore difference and obscure broader questions concerning education, thus contributing to the reproduction of previously existing problems and supporting new forms of colonisation. 相似文献
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Tony Cooper Keri Wilton Ted Glynn 《International Journal of Disability, Development & Education》1985,32(1):5-11
This study sought to determine the prevalence of mildly retarded children in a sample of 312 primary school classes (N (pupils) = 8,967). Schools were chosen at random from each of the eight Psychological Service districts of metropolitan Auckland; all Grade 2‐5 classes in the sample schools were included in the investigation. Eighty percent of the teachers surveyed believed they had one or more mildly retarded children in their classes, yielding an overall prevalence rate of 8.04 percent (N = 721). Approximately one‐third of the children designated as mildly retarded were considered by their teachers to be not coping academically as well as socially, but of these 75 percent had not been referred for special educational consideration. Comparisons among the eight districts revealed that prevalence/referral rates and characteristics of identified/referred children did not differ significantly across districts. Results are discussed in terms of their policy implications for the identification and referral of mildly retarded children in need of special educational services. 相似文献
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Leandro de Carvalho da Silva Carla Ferro Pereira-Monfredini 《Journal of sports sciences》2017,35(18):1825-1830
This study aimed at assessing the interaction between subjective error estimation and frequency of extrinsic feedback in the learning of the basketball free shooting pattern by children. 10- to 12-year olds were assigned to 1 of 4 groups combining subjective error estimation and relative frequency of extrinsic feedback (33% × 100%). Analysis of performance was based on quality of movement pattern. Analysis showed superior learning of the group combining error estimation and 100% feedback frequency, both groups receiving feedback on 33% of trials achieved intermediate results, and the group combining no requirement of error estimation and 100% feedback frequency had the poorest learning. Our results show the benefit of subjective error estimation in association with high frequency of extrinsic feedback in children’s motor learning of a sport motor pattern. 相似文献
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A number of studies have concluded that when students have greater confidence about their math skills and are aware of its
usefulness, they have a more positive perception of the subject. This article aims to examine whether this pseudo linear trend
in the relationship between affective and instrumental dimensions is also true of the university context. Special attention
is devoted to the articulation of these dimensions in structuring student perceptions of quantitative methods so as to identify
the various forms that this interaction can assume. Our second aim is to understand how the perceptions of these subjects
are constructed by students from degree courses in distinct scientific areas. Can we speak of group dynamics whereby socialization
within each degree course triggers the sharing of similar perceptions? We concluded that a certain linear trend can also be
identified in the university context in the relationship between the affective dimension and usefulness of quantitative methods
i.e., that the highest levels in the perception of the usefulness of these subjects corresponded to the highest levels of
self confidence and enjoyment of the subjects. However, in addition to this scenario there is another configuration in which
negative feelings coexist with the recognition of the usefulness of quantitative methods subjects. Namely, lower levels of
self confidence and enjoyment of these subjects can also be associated with high levels of perceived usefulness. We also concluded
that there is evidence of what we designated a certain course culture in the perceptions about quantitative methods. Nevertheless,
when our observation is extended to the scientific area the heterogeneity of the perceptions becomes evident. Another important
finding is the rejection of the thesis, at least in the university context, that defends the lack of self-confidence in quantitative
methods among females student. 相似文献
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Sidney Roberto Carvalho Ubirajara Franco Moreno 《Journal of The Franklin Institute》2021,358(9):5039-5072
In distributed and cooperative systems, the network structure is determinant to the success of the strategy adopted to solve complex tasks. Those systems are primarily governed by consensus protocols whose convergence is intrinsically dependent on the network topology. Most of the consensus algorithms deal with continuous values and perform average-based strategies to reach cohesion over the exchanged information. However, many problems demand distributed consensus over countable values, that cannot be handled by traditional protocols. In such a context, this work presents an approach based on semidefinite programming to design the optimal weights of a network adjacency matrix, in order to control the convergence of a distributed random consensus protocol for variables at the discrete-space domain, based on the voter model. As a second contribution, this work uses Markov theory and the biological inspiration of epidemics to find out a dynamical spreading model that can predict the information diffusion over this discrete consensus protocol. Also, convergence properties and equilibrium points of the proposed model are presented regarding the network topology. Finally, extensive numerical simulations evaluate the effectiveness of the proposed consensus algorithm, its spreading model, and the approach for optimal weight design. 相似文献