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排序方式： 共有363条查询结果，搜索用时 225 毫秒
81.
Eija Pakarinen Marja‐Kristiina Lerkkanen Anna‐Maija Poikkeus Martti Siekkinen Jari‐Erik Nurmi 《教育心理学》2011,31(1):37-53
This study examined the extent to which kindergarten children’s academic pre‐skills are associated with their teachers’ subsequent teaching practices. The pre‐skills in reading and math of 1268 children (655 boys, 613 girls) were measured in kindergarten in the fall. A pair of trained observers used the Classroom Assessment Scoring System instrument to observe 49 kindergarten teachers on their emotional support, classroom organisation and instructional support in kindergarten in the spring. The results of the multilevel modelling showed that low levels of academic pre‐skills in kindergarten classrooms in the fall predicted high classroom quality in the classrooms later on. The results suggest that the overall level of children’s academic pre‐skills in the classroom plays an important role in the ways in which teachers adapt their instructional practices to the needs of a particular classroom. 相似文献
82.
Katja Uhlig Bj?rn Boysen Andreas Lankenau Magnus Jaeger Erik Wischerhoff Jean-Fran?ois Lutz André Laschewsky Claus Duschl 《Biomicrofluidics》2012,6(2)
Thermoresponsive polymer surface coatings are a promising tool for cell culture applications. They allow for a mild way of cell detachment that preserves the activity of membrane proteins—a prerequisite for reliable cell analysis. To enlarge the application range of these coatings to cells with different adhesion properties, we synthesized various novel poly(ethylene glycol)-based thermoresponsive polymers and describe how (i) their chemical structure and (ii) their surface density affect their efficiency. In order to quantify the influence of both factors, the time for cell spreading and rounding efficiency were observed. As a result, efficiency of cell rounding, which is closely correlated to cell detachment, is less affected by both factors than the time needed for cell spreading. This time can effectively be adjusted by the molecular architecture which includes the length of the polymer backbone and the side chains. Based on this work, recommendations are given for future optimization of functionality of thermoresponsive polymer coatings for cell culture applications. 相似文献
83.
Riikka Hirvonen George K. Georgiou Marja‐Kristiina Lerkkanen Kaisa Aunola Jari‐Erik Nurmi 《Journal of Research in Reading》2010,33(3):302-319
The purpose of this study was twofold: (a) to examine the effect of task‐focused behaviour on reading fluency, spelling and comprehension; and (b) to examine the role of the different literacy skills in subsequent task‐focused behaviour. Two hundred and seven Finnish‐speaking children were followed from preschool until their fourth year at school and were tested for reading fluency, spelling and reading comprehension. The teachers also rated the children's task‐focused behaviour. The results showed that task‐focused behaviour was a significant predictor of later reading comprehension and spelling skills. However, all three literacy skills predicted subsequent task‐focused behaviour. 相似文献
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Exploiting Hierarchy in Text Categorization 总被引：4，自引：3，他引：1
With the recent dramatic increase in electronic access to documents, text categorization—the task of assigning topics to a given document—has moved to the center of the information sciences and knowledge management. This article uses the structure that is present in the semantic space of topics in order to improve performance in text categorization: according to their meaning, topics can be grouped together into meta-topics, e.g., gold, silver, and copper are all metals. The proposed architecture matches the hierarchical structure of the topic space, as opposed to a flat model that ignores the structure. It accommodates both single and multiple topic assignments for each document. Its probabilistic interpretation allows its predictions to be combined in a principled way with information from other sources. The first level of the architecture predicts the probabilities of the meta-topic groups. This allows the individual models for each topic on the second level to focus on finer discriminations within the group. Evaluating the performance of a two-level implementation on the Reuters-22173 testbed of newswire articles shows the most significant improvement for rare classes. 相似文献
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Swedish higher education institutions havebeen given increased autonomy to organise theirinternal affairs, raising numerous demands onleadership and governance. Changes are so profoundthat institutions wanting to create an`entrepreneurial response' through a newdecision-making structure must undergo a culturerevolution, threatening existing power structures. Three organising principles are used to describe andanalyse Göteborg University. One conclusion isthat collegial decision-making bodies shouldsimultaneously be redefined, reestablished andabolished, depending on the issues dealt with.Commissions as deans and department heads must beclear and accountable to superiors or tonon-sub-optimising boards in a balanced powerstructure. 相似文献
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