基于用户兴趣度量的知识发现服务精准推荐     

丁梦晓  毕强  许鹏程  李洁  牟冬梅 《图书情报工作》2019,63(3):21-29

[目的/意义]针对当前知识发现服务中存在的个性化程度不高和推荐效果不佳等问题，提出一种基于用户兴趣度量和内容分析的推荐算法。[方法/过程]文章通过特征词分布、LDA主题分布、引文结构网络三个维度构建学术资源模型，并通过对用户行为的度量，计算用户对其浏览学术资源的兴趣度，结合学术资源模型构建用户兴趣模型。将用户兴趣模型与学术资源模型匹配，计算其相似度，得到用户对每条学术资源的兴趣值，最后将兴趣值最高的TOP-N学术资源推荐给用户。[结果/结论]通过实验检验算法的有效性和推荐准确率，结果显示，本文从实时动态度量兴趣的角度，提出的推荐算法能较好地预测用户兴趣，推荐效果显著，为实现发现服务精准推荐提供思路。  相似文献   

Online visibility of software-related web sites: The case of biomedical text mining tools     

Gael Pérez-Rodríguez  Martín Pérez-Pérez  Florentino Fdez-Riverola  Anália Lourenço 《Information processing & management》2019,56(3):565-583

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基于层次全息模型的中小学体育运动会风险评估研究     

陈蔚  李燕燕  黄明明 《武汉体育学院学报》2019,53(11):64-71

随着社会进步与教育环境诸多变化，中小学体育运动会风险管理亟需实现积极安全态度与现代技术防范并举。基于新时期中小学体育运动会风险评估是含有多重判断的复杂体系，该文引入层次全息建模HHM风险识别分析工具，构建包括运动会本体、组织管理、人员素质、场地设施、环境5大类别24个层次全息子系统的适用中小学体育运动会风险识别的全息模型，重点阐释了"组织管理——人员"风险识别的主场景，并通过HHM全息框架的指标转换、推演与扩展，统计中小学体育运动会风险清单全息模型配对的发生数目，运用层次分析法和帕累托分析法进行量化和评级，为中小学体育运动会风险量化评估提供参考依据。  相似文献   

Reciprocal Versus Nonreciprocal Assessment of Knee Flexors and Extensors in Concentric Actions Using the CON-TREX Multijoint Isokinetic Dynamometer: A Reliability Study     

Alex Bliss  Jeanne Dekerle 《Measurement in physical education and exercise science》2019,23(2):118-123

Knee flexor and extensor muscular assessment via isokinetic dynamometry is common practice and established in the research literature. However, reporting assessment methodology regarding reciprocal and nonreciprocal movements is often vague or absent. Such methodological issues are crucial for accurate assessments. Therefore, knee extensor and flexor peak moment using either reciprocal movement or nonreciprocal modalities was assessed. Fifteen participants performed three blocks of five concentric muscle actions at three angular velocities [1: nonreciprocal (maximal active flexion followed by passive extension); B2: reciprocal (maximal active extension followed by maximal active flexion); B3 nonreciprocal (maximal active extension followed by passive flexion)]. ANOVA revealed statistically significant within-subject modality effects for peak knee extensor moment and flexor velocity and modality differences (p < .05). Reciprocal and nonreciprocal assessments give significantly different results, with nonreciprocal giving higher peak moments. Reporting which modality is used is crucial to allow for greater clarity for the reader and practitioner.  相似文献   

Structure and development of pre-service physics teachers’ professional knowledge     

Stefan Sorge  Jochen Kröger  Stefan Petersen  Knut Neumann 《International Journal of Science Education》2019,41(7):862-889

ABSTRACT

Teachers’ professional knowledge is considered one of the most important predictors of instructional quality. According to Shulman, such professional knowledge includes content, pedagogical content and pedagogical knowledge. Although recent research shed some light on the structure of the dimensions of professional knowledge, little is known how teacher education impacts pre-service physics teachers’ professional knowledge. In an effort to address this issue, we examined the content, pedagogical content and pedagogical knowledge of N?=?200 pre-service physics teachers enrolled in different years of teacher education at 12 major teacher education universities in Germany. We used structural equation modelling (1) to examine the relations amongst pre-service physics teachers’ content, pedagogical content and pedagogical knowledge, (2) to explore how the three kinds of knowledge and their relations differ across different stages of teacher education and (3) to identify factors affecting the level of each component of professional knowledge. Our findings suggest that content, pedagogical content and pedagogical knowledge represent distinct types of knowledge. Furthermore, our findings show that in the first years of professional education, pedagogical content knowledge is more closely related with general pedagogical knowledge while in later years, it is more closely related with content knowledge, suggesting that it develops from a general knowledge about teaching and learning into knowledge about the teaching and learning of specific content. Finally, beyond school achievement and years of enrolment as predictors, we find in particular the amount of classroom observations to have a positive impact on the professional knowledge of pre-service physics teachers.  相似文献   

顺应与重塑:我国校园体操发展的生态适应与主动转型     

陶成武  李先雄 《武汉体育学院学报》2020,54(12):82-88

新中国成立以来我国校园体操发展的价值理念、存在样态与治理实践发生了重大变革与结构转型。价值理念从工具理性的健康诉求上升到了价值理性的生命育化,践行了从强体卫国到重技荣国,身心之育到生命之育的目标转向与效用升级,内蕴有对学校体育崇高使命与体操事业发展的不懈追求。存在样态践履了技术传承到活动育人的过程延伸,既有前期继承发展到本土创新的结构异化,亦有期待从内容分散到系统规划的量质协调发展,大致表现为外部引入为拓展,本土适应为创新的总体特征。治理实践历经了高度集权的行政依附到参与分权的责能转移,推动了治理主体由“同构”多元向“自主”多元的关系转变。长远来看,我国校园体操的发展要走出狭隘理论认知与实践表达的误区,基于对个体健康成长与全面发展的理念,系统规划校园体操的学—练—赛,以及平衡治理主体之间的契约合作关系,以推动校园大众性体操之扩基与竞技性体操之强基的量质协调与融合发展。  相似文献   

Teachers’ epistemic cognition in situ: Evidence from classroom assessment     

《Contemporary educational psychology》2020

Assessment tasks require the coordination of multiple knowledge-related goals for various audiences, and therefore provide an authentic context to observe teachers’ epistemic cognition in practice. In this instrumental case study, we investigated seven, fifth grade English Language Arts teachers’ epistemic cognition as they evaluated students’ classroom assessments. Our analyses revealed that the components of epistemic cognition identified in the literature emerged in these teachers’ assessment processes. Moreover, we found evidence that teachers’ epistemic cognition was iterative and nuanced, and required shifts in aims and reliable processes. This resulted in teachers forming new kinds of “epistemic matters” and questions beyond those ideas noted in existing models of epistemic cognition. Significance and implications are discussed.  相似文献   

Preservice secondary subject teachers incorporating movement integration into classroom practice     

《Teaching and Teacher Education》2020

The present study explores Finnish preservice subject teachers’ perspectives and experiences with movement integration in academic classrooms. In the study, 44 subject teachers applied an integrated approach to infuse physical activity into a required teacher-preparatory course. The program’s framework is the constructivist learning approach. Data were collected through interviews, classroom observations and field notes. The findings show that movement integration was a new concept for the preservice teachers and that their experience positively influenced their beliefs regarding the use of that concept in academic lessons. Thus, it is possible to support implementation of movement integration into secondary academic classrooms.  相似文献   

The potential formative benefits of portfolio assessment in second and foreign language writing contexts: A review of the literature     

《Studies in Educational Evaluation》2014

This article identifies the potential formative benefits of using portfolio assessment (PA) in second/foreign language classrooms by reviewing the up-to-date research. Three methods were used to search for relevant research: database search, manual search, and citation search. According to the literature, PA has potential benefits due to its process-oriented, authentic, integrated, interactive, and learner-centered characteristics. PA leads to increased motivation, learner autonomy, and improved writing performance. However, not many studies include observation as a method of collecting data. Through observation a researcher can investigate how the benefits of PA are acted upon and negotiated. There is a need for more empirical research in the juxtaposition of PA and formative assessment, particularly in primary and secondary education.  相似文献   

Scope and Difficulties of the Transmedia Practice. A Case Study on the Spanish PSM System     

Ainara Larrondo Ureta 《Journalism Practice》2020,14(8):991-1007

ABSTRACT

According to a growing volume of academic literature on the subject, transmedia fiction and non-fiction production is now one of the main areas driving innovation in media companies, thanks to the improvements it brings in numerous interconnected fields: narrative and content, management and productive strategy, brand promotion, etc. In this context the article focuses on transmedia linked to public broadcasting companies, starting with a qualitative study based on interviews with expert professionals from thirteen corporations in Spain, one operating at the national level (RTVE) and twelve at the regional level (A Punt Media, CARTV, CCMA, CRTVG, CMM, EITB, EPRTVIB, RTVM, RTPA, RTVA, RTRM and RTVC). The results show how professionals view the concept of transmedia production, its advantages, disadvantages and the challenges it poses, which depend on these corporations’ service and relationship with audiences. As the conclusions state, the keys factors for understanding the professional transmedia strategy of public broadcasting corporations are found in the characteristics of today’s media market, which is suffering from budget cuts and growing competition.  相似文献