An empirical study of query expansion and cluster-based retrieval in language modeling approach     

Seung-Hoon Na  In-Su Kang  Ji-Eun Roh  Jong-Hyeok Lee 《Information processing & management》2007

The term mismatch problem in information retrieval is a critical problem, and several techniques have been developed, such as query expansion, cluster-based retrieval and dimensionality reduction to resolve this issue. Of these techniques, this paper performs an empirical study on query expansion and cluster-based retrieval. We examine the effect of using parsimony in query expansion and the effect of clustering algorithms in cluster-based retrieval. In addition, query expansion and cluster-based retrieval are compared, and their combinations are evaluated in terms of retrieval performance by performing experimentations on seven test collections of NTCIR and TREC.  相似文献   

网络教学平台使用的师资培动——香港理工大学的经验     

吴廷坚 《远程教育杂志》2007,12(4):4-7

面授和网上教学有机结合的整合式教学越来越成为高校教育和培训的主要模式。本文旨在介绍和分析香港理工大学教学发展中心（简称EDC）如何通过网上教学平台的功能,与面授教学结合起来,发挥面授教学和网上教学的各自优势,使教师培训更加有效。EDC的实践表明,在大学教师培训课程中,发挥网上教学的优势,能帮助学员弥补由于有限的面授教学产生的师生之间、学员和学员之间互动的不足。在网上学习中,通过互相的学习观摩和观念碰撞,能激发学员的学习兴趣,有效地促进学员之间进行探究性学习,同时,这种集体学习的方法,能促进在职教师之间的友好交往和学术交流。  相似文献   

Cumulus-specific genes are transcriptionally silent following somatic cell nuclear transfer in a mouse model     

Tong GQ  Heng BC  Ng SC 《Journal of Zhejiang University. Science. B》2007,8(8):533-539

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The efficacy of ASL/ENGLISH bilingual education: considering public schools     

DeLana M  Gentry MA  Andrews J 《American annals of the deaf》2007,152(1):73-87

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A response to Melton based on the best available data     

Drake B  Jonson-Reid M 《Child abuse & neglect》2007,31(4):343-360

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Religious Development in African American Adolescents: Growth Patterns That Offer Protection     

Daniel B. Lee  Enrique W. Neblett 《Child development》2019,90(1):245-259

Although religiosity promotes resilient outcomes in African American (AA) adolescents, there is a lack of research that examines the protective role of religious development in the context of stressful life events (SLEs). In 1,595 AA adolescents, a cohort-sequential design was used from ages 12 to 18 to examine subtypes of religiosity, as well as distinct developmental patterns within subtypes. The protective role of religious development was also examined in the context of SLEs. The study findings indicated two subtypes of religiosity—extrinsic and intrinsic religiosity—as well as low and high developmental patterns in the identified subtypes. Furthermore, the protective influence of extrinsic and intrinsic religiosity gradually diminished from age 12 to 18 in the context of SLEs.  相似文献   

An Entity Theory of Intelligence Predicts Higher Cortisol Levels When High School Grades Are Declining     

Hae Yeon Lee  Jeremy P. Jamieson  Adriana S. Miu  Robert A. Josephs  David S. Yeager 《Child development》2019,90(6):e849-e867

Grades often decline during the high school transition, creating stress. The present research integrates the biopsychosocial model of challenge and threat with the implicit theories model to understand who shows maladaptive stress responses. A diary study measured declines in grades in the first few months of high school: salivary cortisol (N = 360 students, N = 3,045 observations) and daily stress appraisals (N = 499 students, N = 3,854 observations). Students who reported an entity theory of intelligence (i.e., the belief that intelligence is fixed) showed higher cortisol when grades were declining. Moreover, daily academic stressors showed a different lingering effect on the next day's cortisol for those with different implicit theories. Findings support a process model through which beliefs affect biological stress responses during difficult adolescent transitions.  相似文献   

Sustainability in Australian schools: A cross-curriculum priority?     

Barnes  Melissa  Moore  Deborah  Almeida  Sylvia 《Prospects》2019,47(4):377-392

PROSPECTS - In light of Australian policy and curriculum initiatives aimed to prioritize Education for Sustainability (EfS) practices, this article discusses a study that evaluated a smart meter...  相似文献   

Development as education for social justice     

Yoo  Sung-Sang  Mosrur  Ridwanul  Lee  Eunhye  Andrea  Diego Toca 《Asia Pacific Education Review》2019,20(2):259-272

Asia Pacific Education Review - The correlation between education and development, with time, went through many changes along with the changes of perspectives. Since both of these concepts...  相似文献   

Study Abroad Participation: An Unintended Consequence of State Merit-Aid Programs?     

Whatley  Melissa 《Research in higher education》2019,60(7):905-930

Research in Higher Education - This study employs difference-in-differences estimation to explore the relationship between the implementation of state merit-aid programs and students’...  相似文献