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排序方式: 共有255条查询结果,搜索用时 15 毫秒
51.
Kirk Roberts Matthew Simpson Dina Demner-Fushman Ellen Voorhees William Hersh 《Information Retrieval》2016,19(1-2):113-148
Providing access to relevant biomedical literature in a clinical setting has the potential to bridge a critical gap in evidence-based medicine. Here, our goal is specifically to provide relevant articles to clinicians to improve their decision-making in diagnosing, treating, and testing patients. To this end, the TREC 2014 Clinical Decision Support Track evaluated a system’s ability to retrieve relevant articles in one of three categories (Diagnosis, Treatment, Test) using an idealized form of a patient medical record. Over 100 submissions from over 25 participants were evaluated on 30 topics, resulting in over 37k relevance judgments. In this article, we provide an overview of the task, a survey of the information retrieval methods employed by the participants, an analysis of the results, and a discussion on the future directions for this challenging yet important task. 相似文献
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Leszek Krzemień Michał Łukomski Łukasz Bratasz Roman Kozłowski Marion F. Mecklenburg 《文物保护研究》2016,61(6):324-330
The drying shrinkage accumulation from exposure of freshly prepared gesso layers to relative humidity (RH) cycles was determined to elucidate the mechanism of craquelure pattern formation on panel paintings. The progresive drying shrinkage of the gesso is observed only under the cycles going to high RH levels which bring about transitions from brittle to ductile state of the material. The first incidence of fracture on the gesso layers occurred after a limited number of cycles ranging between a few and 100 for a range of layer thickness between 0.5 and 1?mm. The craquelure patterns stabilised also after a limited number of cycles (30 for the 1-mm thick layer). Upon increase in the gesso layer thickness, the strength of the layer is reduced and the spacing of shrinkage fractures increases. The study demonstrated that craquelure patterns, mimicking historical ones, can be realistically produced in laboratory conditions. Such studies would provide useful information for preparing specimens simulating historic panel paintings and would inform the current efforts on automatic, computer-aided classifications of crack formations on paintings. 相似文献
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Julio M. del Hoyo-Melndez Marion F. Mecklenburg María Teresa Domnech-Carb 《Journal of Cultural Heritage》2011,12(1):54
This paper presents the results of a light levels survey conducted at the Donald W. Reynolds Center for American Art and Portraiture in Washington DC. The museum space is shared by the National Portrait Gallery and the Smithsonian American Art Museum. After six years of extensive renovations, the building reopened to the public in July 1, 2006. The structure was not originally designed to house a museum collection since it contains numerous openings such as windows, doors and skylights, which provide a path for natural radiation to enter the building and come in contact with the artworks. From a preventive conservation standpoint, this is an important problem since sensitive works of art in the collection may be subjected to damage caused by light exposure. Environmental data loggers installed throughout the museum were programmed to take successive measurements every 10 min for 24 h a day, 7 days a week and 52 weeks a year. This light levels assessment started in November 1, 2007 and finished in October 31, 2008. This study presents a new method for determining natural radiation exposures registered in exhibition spaces that rely on both electric lighting and natural lighting, considering the growing trend of using daylight illumination in museums. 相似文献
54.
This study compared parent and teacher perceptions of gifted children's social skills and the importance these adults attach to different social skills. No significant differences were found on overall ratings of social skills. However, differences were found on specific social skills. Teacher ratings of cooperation were significantly higher than parents' and teachers valued cooperation highly. Parent ratings of assertion were significantly higher than teachers' and they valued assertion and self‐control over cooperation. Implications for the classroom and home are discussed. 相似文献
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This article reports on the results from a study which investigated the impact of guidance given in writing tasks on children's writing performance. Six hundred eleven year olds completed writing tasks with varying content and structural support and their writing was analysed for purpose and organisation, style, spelling, clause structure, word class, paragraphing and punctuation. The aim was to find out if support facilitated better writing and if the type of support had differing effects. The findings suggested that the support did not significantly affect performance in narrative and persuasive writing. Possible implications and initial indications from a follow-up qualitative study of children's thinking are discussed. 相似文献
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Marion McLarty 《欧洲特需教育杂志》2013,28(1):12-20
ABSTRACT The use of objects of reference as part of the development of communication‐has become established practice in the education of deafblind and multi‐sensory impaired children and young people. Unfortunately, there is comparatively little written material available for those who wish to develop this approach in their own practice with learners who have severe or profound and multiple difficulties. The result of this has been that many of the ‘second wave’ of interested practitioners have overemphasized the objects themselves with little or no appreciation of their use within a supporting context. The paper considers the philosophies and theories that underpin the methodological framework in deafblind education, and suggests how these could be applied to develop practice with a wider group of learners 相似文献
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