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Background:An article''s citations are useful for finding related articles that may not be readily found by keyword searches or textual similarity. Citation analysis is also important for analyzing scientific innovation and the structure of the biomedical literature. We wanted to facilitate citation analysis for the broad community by providing a user-friendly interface for accessing and analyzing citation data for biomedical articles.Case Presentation:We seeded the Citation Cloud dataset with over 465 million open access citations culled from six different sources: PubMed Central, Microsoft Academic Graph, ArnetMiner, Semantic Scholar, Open Citations, and the NIH iCite dataset. We implemented a free, public extension to PubMed that allows any user to visualize and analyze the entire citation cloud around any paper of interest A: the set of articles cited by A, those which cite A, those which are co-cited with A, and those which are bibliographically coupled to A.Conclusions:Citation Cloud greatly enables the study of citations by the scientific community, including relatively advanced analyses (co-citations and bibliographic coupling) that cannot be undertaken using other available tools. The tool can be accessed by running any PubMed query on the Anne O''Tate value-added search interface and clicking on the Citations button next to any retrieved article.  相似文献   

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The purpose of this study was to determine the amount of correlation between National Library of Medicine classification numbers and MeSH headings in a body of cataloging which had already been done and then to find out which of two alternative methods of utilizing the correlation would be best.There was a correlation of 44.5% between classification numbers and subject headings in the data base studied, cataloging data covering 8,137 books. The results indicate that a subject heading index showing classification numbers would be the preferred method of utilization, because it would be more accurate than the alternative considered, an arrangement by classification numbers which would be consulted to obtain subject headings.  相似文献   

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In this paper we present a first large-scale analysis of the relationship between Mendeley readership and citation counts with particular documents’ bibliographic characteristics. A data set of 1.3 million publications from different fields published in journals covered by the Web of Science (WoS) has been analyzed. This work reveals that document types that are often excluded from citation analysis due to their lower citation values, like editorial materials, letters, news items, or meeting abstracts, are strongly covered and saved in Mendeley, suggesting that Mendeley readership can reliably inform the analysis of these document types. Findings show that collaborative papers are frequently saved in Mendeley, which is similar to what is observed for citations. The relationship between readership and the length of titles and number of pages, however, is weaker than for the same relationship observed for citations. The analysis of different disciplines also points to different patterns in the relationship between several document characteristics, readership, and citation counts. Overall, results highlight that although disciplinary differences exist, readership counts are related to similar bibliographic characteristics as those related to citation counts, reinforcing the idea that Mendeley readership and citations capture a similar concept of impact, although they cannot be considered as equivalent indicators.  相似文献   

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ABSTRACT

The Library of Congress Subject Headings have been criticized for containing biased subject headings. One leading critic has been Sanford Berman, whose 1971 monograph Prejudices and Antipathies: A Tract on the LC Subject Heads Concerning People (P&A), listed a number of objectionable headings and proposed remedies. In the decades since P&A was first published, many of Berman's suggestions have been implemented, while other headings remain unchanged. This paper compiles all of Berman's suggestions and tracks the changes that have occurred; a brief analysis of the remaining areas of bias is included.  相似文献   

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Civil libertarian doctrine which was dominant during the twentieth century argued that the main goal of freedom of speech was to ensure that the public would be well-informed and actively engage in public deliberation. A literal extension of this claim to the Internet age often justifies the regulation of online speech under the assumption that harmful communication undermines the public interest. This study challenges civil libertarianism and proposes a new thesis of freedom of online speech, which posits that online speech should be understood in terms of a democratic culture where every individual participates freely and without restraints in the process of meaning making that constitute her/him as an autonomous individual. Based on such a theoretical concept, this study identifies three important aspects of online speech freedom – unfettered speech, anonymous speech, and participatory speech – and then compares the status of online speech between South Korea and the United States. This research suggests that a society should understand the unique nature of online speech and then arrange the legal system to fit into it.  相似文献   

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"文献"是一个集合概念,是档案文献、图书馆文献的属概念.档案文献和图书馆文献是"文献"的子集.实践中,两种类型的文献存在定义上不精准,使用上"同语异意,异语同意""用而不定"现象.从种属关系入手,准确定义两种类型的文献术语,是档案学和图书馆学共同的使命与任务.  相似文献   

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In studying online political communication in China, many researchers apply theories generated in the West (particularly that of the public sphere) without questioning their applicability in the Chinese context. Others argue that new theories must be generated from the ground up, often basing these theories on traditional Chinese philosophies. However, the applicability of these approaches remains unproven. This research uses a content analysis to compare comments on news stories on Chinese and Western social media sites. It finds that there is little evidence to support either the use of public sphere theory in China or the use of traditional conceptions of Eastern styles of communication. Chinese netizens were no more subtle or harmonious (if anything, they were more divisive) and were less likely to talk with others, attempt to understand others’ opinions or attempt to work towards consensus or resolution. Based on these findings, I propose that future research should attempt to build more appropriate theories based on an understanding of how political ideas are actually produced, transmitted and received in society, rather than continuing to apply foreign or ancient theoretical frameworks without a critical interrogation of their applicability in their context of application.  相似文献   

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