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ABSTRACT

Cataloging digitized continuing resources is a challenging task for many libraries because of their complex cataloging rules and characteristics of format. As libraries provide their digitized content and catalog records in shared environments, like HathiTrust, and use them as an access point, libraries also have to work with holdings and item records created by each contributing institution's local practice. This article discusses common challenges imposed on libraries when creating and providing access to digitized continuing resources available in a shared environment, stresses the importance of having shareable holdings and items records, and suggests possible ways to work with those challenges.  相似文献   
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Multilingual information retrieval is generally understood to mean the retrieval of relevant information in multiple target languages in response to a user query in a single source language. In a multilingual federated search environment, different information sources contain documents in different languages. A general search strategy in multilingual federated search environments is to translate the user query to each language of the information sources and run a monolingual search in each information source. It is then necessary to obtain a single ranked document list by merging the individual ranked lists from the information sources that are in different languages. This is known as the results merging problem for multilingual information retrieval. Previous research has shown that the simple approach of normalizing source-specific document scores is not effective. On the other side, a more effective merging method was proposed to download and translate all retrieved documents into the source language and generate the final ranked list by running a monolingual search in the search client. The latter method is more effective but is associated with a large amount of online communication and computation costs. This paper proposes an effective and efficient approach for the results merging task of multilingual ranked lists. Particularly, it downloads only a small number of documents from the individual ranked lists of each user query to calculate comparable document scores by utilizing both the query-based translation method and the document-based translation method. Then, query-specific and source-specific transformation models can be trained for individual ranked lists by using the information of these downloaded documents. These transformation models are used to estimate comparable document scores for all retrieved documents and thus the documents can be sorted into a final ranked list. This merging approach is efficient as only a subset of the retrieved documents are downloaded and translated online. Furthermore, an extensive set of experiments on the Cross-Language Evaluation Forum (CLEF) () data has demonstrated the effectiveness of the query-specific and source-specific results merging algorithm against other alternatives. The new research in this paper proposes different variants of the query-specific and source-specific results merging algorithm with different transformation models. This paper also provides thorough experimental results as well as detailed analysis. All of the work substantially extends the preliminary research in (Si and Callan, in: Peters (ed.) Results of the cross-language evaluation forum-CLEF 2005, 2005).
Hao YuanEmail:
  相似文献   
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The purpose of this article is to propose an elective social work course as a means of better preparing social workers entering practice in healthcare to meet the challenges of promoting health and reducing health disparities in minority and underserved communities. Course offerings specifically targeting health or medical social work training vary widely. The additional training provided at places of employment and through continuing education after the master's degree is often inadequate for competently addressing the issues clinicians face in practice.  相似文献   
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This research examined the influence formative self-assessment had on first/second year community college student self-regulatory practices. Previous research has shown that the ability to regulate one’s learning activities can improve performance in college classes, and it has long been known that the use of formative assessment improves learning. However, little has been done exploring the influence of formative self-assessment on variables associated with both student and institutional success. First/second year community college students enrolled in 10 self-assessment and six traditional assessment classes completed the Motivated Strategies for Learning Questionnaire (MSLQ) at the conclusion of one semester as a measure of self-regulation specific to the individual class under examination. A modest effect of assessment type was found for self-reported self-regulation where students in self-assessment classes reported higher self-regulation than students in traditional assessment classes. Self-regulation was significantly and positively correlated with both behavioral (i.e., effort) and motivational (i.e., mastery goal orientation) variables. Additional results indicated a robust effect of instructor on self-regulation and a significant increase in retention for students enrolled in self-assessment classes. The findings of this research have implications for both classroom practice and institutional retention initiatives.  相似文献   
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Library patrons have many requests for library services and resources. With limited budgets and library staff who are already stretched thin, how can academic libraries ever hope to understand and meet the growing variety of patron needs and desires? This article will outline a successful strategy of utilizing students to pitch, pilot, and implement academic library services as well as gather feedback from fellow students about their expectations for the academic library.  相似文献   
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There is no doubting the influence and impact of (Lord) John Reith on the shape of British broadcasting, both radio and television. As one cultural historian argues: ‘he occupies an important place in the social and cultural history of twentieth-century Britain.’ The most commonly-accepted view in television histories is that John Reith disliked television, would have nothing to do with the medium, viewed those involved with establishing and running the BBC's television service with contempt, and refused to watch television programmes. However, drawing on both archival and secondary resources, together with Trine Syvertsen's notion of ‘media resistance’, I argue that Reith's relationship with television was far more complex than has been understood thus far and that his attitude towards the new technology was shaped by a combination of personal and professional factors.  相似文献   
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This article explores a theoretical framework to consider when teaching statistics. It is discussed and illustrated using one innovative approach to teaching using computer simulation methods. This framework can be considered across many different disciplines and age levels.  相似文献   
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