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1.
Spatial scientometrics: Towards a cumulative research program 总被引：1，自引：0，他引：1
We propose a research program to analyse spatial aspects of the science system. First, we provide a review of scientometric studies that already explicitly take the spatial dimension into account. The review includes studies on (i) the spatial distribution of research and citations, (ii) the existence of spatial biases in collaboration, citations and mobility, and (iii) the citation impact of national versus international collaborations. Then, we address a number of methodological issues in dealing with space in scientometrics. Finally, to integrate spatial and non-spatial approaches, we propose an analytical framework based on the concept of proximity. A proximity approach allows for combining hypotheses from different theoretical perspectives into a single framework. 相似文献
2.
Sjoerd Karsten John J. Cogan David L. Grossman Mei- hui Liu Somwung Pitiyanuwat 《Asia Pacific Education Review》2002,3(2):168-183
This study examines the views of future teachers of social studies regarding significant global trends, required citizen characteristics,
and necessary educational strategies to develop the said characteristics. The study builds upon the landmark work of the nine-nation
Citizenship Education Policy Study (CEPS I) carried out in the late 1990s that resulted in the model calledmultidimensional citizenship. The original work focused on the views of policy makers and scholars. The present research, CEPS II, is a follow-up study
that seeks to determine the views of the next generation of those who will teach citizenship and civic education through social
studies programs in seven participant societies: China, Hong Kong SAR, Japan, The Netherlands, Taiwan, Thailand and the United
States of America. The results suggest that the future teachers, when compared with the policy experts and scholars in the
original CEPS I study, are more optimistic about the future and are more oriented towards personal development and participatory
behaviors that will positively impact the common good. 相似文献
3.
This paper shows that the conditionality of investment decisions in R&D has a critical impact on portfolio risk, and implies that traditional diversification strategies should be reevaluated when a portfolio is constructed. Real option theory argues that research projects have conditional or option-like risk and return properties, and are different from unconditional projects. Although the risk of a portfolio always depends on the correlation between projects, a portfolio of conditional R&D projects with real option characteristics has a fundamentally different risk than a portfolio of unconditional projects. When conditional R&D projects are negatively correlated, diversification only slightly reduces portfolio risk. When projects are positively correlated, however, diversification proves more effective than conventional tools predict. 相似文献
4.
S-T. Hynynen M. M. van Stralen F. F. Sniehotta V. Araújo-Soares W. Hardeman M. J. M. Chinapaw 《International review of sport and exercise psychology》2016,9(1):22-44
Lack of physical activity (PA) and high levels of sedentary behaviour (SB) have been associated with health problems. This systematic review evaluates the effectiveness of school-based interventions to increase PA and decrease SB among 15–19-year-old adolescents, and examines whether intervention characteristics (intervention length, delivery mode and intervention provider) and intervention content (i.e. behaviour change techniques, BCTs) are related to intervention effectiveness. A systematic search of randomised or cluster randomised controlled trials with outcome measures of PA and/or SB rendered 10 results. Risk of bias was assessed using the Cochrane risk of bias tool. Intervention content was coded using Behaviour Change Technique Taxonomy v1. Seven out of 10 studies reported significant increases in PA. Effects were generally small and short-term (Cohen's d ranged from 0.132 to 0.659). Two out of four studies that measured SB reported significant reductions in SB. Interventions that increased PA included a higher number of BCTs, specific BCTs (e.g., goal setting, action planning and self-monitoring), and were delivered by research staff. Intervention length and mode of delivery were unrelated to effectiveness. More studies are needed that evaluate long-term intervention effectiveness and target SBs among older adolescents. 相似文献
5.
Sjoerd Karsten 《教育政策杂志》2013,28(3):211-225
This paper examines the implications of the uneven distribution of minority pupils and the Dutch system of choice for policies on ethnic segregation at both the local and school level. The analysis is based on a sample of 27 municipalities serving 23% of all Dutch primary school pupils. Segregation to a large extent can be found in The Netherlands as elsewhere, and the constitutional freedom of education is precisely the factor that places important restrictions on solving this problem adequately. At the local level more than one‐third of all municipalities, for various reasons, do not take any action. Of the others that do take action the majority saddles the schools with the responsibility since the problems are mainly seen as of an educational nature. According to the school principals a percentage of minority pupils exceeding 50‐60% causes ‘white’ parents to leave and they are given every opportunity to do so by the Dutch system of free parental choice. Therefore a radical reorientation is required in the Dutch system of choice in order to address the challenges of ethnic segregation. 相似文献
6.
After several failed attempts to rein in the growth of special education, the Dutch government made a start in 1991 with a policy to accommodate pupils with problems in regular education and to put a stop to the growth of special education. This paper examines a large-scale study conducted by our research group at the University of Amsterdam which attempted to answer the question whether pupils with problems are better off in special education where there are more resources and they can get more attention than in mainstream schools. It was expected that the pupils in special education would do better due to the specialist care and individual attention. However, with a few exceptions, few differences were found when comparable at-risk pupils in regular schools were compared with their counterparts in both types of special schools. There was a conspicuously large measure of variability in both regular and special education. All school types had both at-risk pupils who were doing well from an academic and/or psychosocial perspective and pupils whose progress left much to be desired. There is little evidence to support the idea that at-risk pupils make less progress, in either their academic or psychosocial development, in regular schools compared with pupils in special schools. The general assumption that at-risk pupils will do better in special education does not seem to account for its attractiveness. Contrary to the policy theory, the dual system, as it exists in The Netherlands, does not appear to be an obstacle to the provision of adequate care for pupils with special educational needs. However, the policy to equip regular schools to accommodate this category of pupils appears not to be realized as simply as that. It has not proved possible to demonstrate the effects of the varying levels of specialist help provided by regular schools on the development of at-risk pupils. 相似文献
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This study examines the emotional engagement with school of a diverse sample of 909 students in post-secondary vocational education in the Netherlands. Using multilevel regression analysis, we assess the role of students' background characteristics and school experiences, and their interaction, in students' emotional engagement with school. At-risk students do not report lower levels of emotional engagement, except for students using (soft)drugs. While Dutch dropout prevention focuses on fostering a sense of belonging through enhancing teacher–student relationships, we do not find a significant role of perceived support from school staff in students' sense of belonging. A good relationship with classmates is more important to engage students in post-secondary vocational education. Perceiving an academic fit is most prominently related to the emotional engagement of vocational students, indicating that a sense of belonging should not only be defined in social, but also in academic terms. 相似文献
9.
Raôul R. D. Oudejans Sjoerd Heubers Jean-René J. A. C. Ruitenbeek Thomas W. J. Janssen 《Research quarterly for exercise and sport》2013,84(3):464-469
We examined the effects of visual control training on expert wheelchair basketball shooting, a skill more difficult than in regular basketball, as players shoot from a seated position to the same rim height. The training consisted of shooting with a visual constraint that forced participants to use target information as late as possible. Participants drove under a large screen that initially blocked the basket. As soon as they saw the basket they shot. When training with the screen, shooting percentages increased. We conclude that visual control training is an effective method to improve wheelchair basketball shooting. The findings support the idea that perceptualmotor learning can be enhanced by manipulating relevant constraints in the training environment, even for expert athletes. 相似文献
10.
Nienke M. Moolenaar Peter J.C. Sleegers Sjoerd Karsten Alan J. Daly 《Educational studies》2012,38(4):355-371
While researchers are currently studying various forms of social network interaction among teachers for their impact on educational policy implementation and practice, knowledge on how various types of networks are interrelated is limited. The goal of this study is to understand the dimensionality that may underlie various types of social networks in schools. We assessed seven types of social interaction using social network data of 775 educators from 53 Dutch elementary schools. The quadratic assignment procedure, multidimensional scaling and network visualisations were used to discern underlying dimensions that may explain the interrelatedness of these seven types of social networks. Findings suggest small to moderate similarity between the seven forms of social interaction. Results support a distinction between instrumental and expressive networks and suggest a second dimension of mutual in(ter)dependence to explain differences in social interaction among teachers. Implications for practice and research on teacher collaboration are discussed. 相似文献