共查询到20条相似文献，搜索用时 323 毫秒
1.
Ahmed Al-Rawi 《Journalism Practice》2017,11(6):705-720
This study aims at understanding international news differences by studying the headlines of over 360,000 news stories posted on the Twitter pages of 12 Arabic and English news organizations. The most referenced countries as well as figures and political actors are examined in these headlines, and the results show that a number of news values elements provide insight into the nature of the news selection. While Arabic channels are mostly focused on the events taking place in the Middle East (proximity), some English-language channels show clear preference for the countries from which they are located, especially CNN and Sky News, as well as Arabic and English state-owned media outlets like France 24 and RT (agenda and ideology). The findings suggest that news content largely follows a number of news values criteria that can explain the news selection process. 相似文献
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Mike Thelwall 《Journal of Informetrics》2019,13(2):555-563
An effective structure helps an article to convey its core message. The optimal structure depends on the information to be conveyed and the expectations of the audience. In the current increasingly interdisciplinary era, structural norms can be confusing to the authors, reviewers and audiences of scientific articles. Despite this, no prior study has attempted to assess variations in the structure of academic papers across all disciplines. This article reports on the headings commonly used by over 1 million research articles from the PubMed Central Open Access collection, spanning 22 broad categories covering all academia and 172 out of 176 narrow categories. The results suggest that no headings are close to ubiquitous in any broad field and that there are substantial differences in the extent to which most headings are used. In the humanities, headings may be avoided altogether. Researchers should therefore be aware of unfamiliar structures that are nevertheless legitimate when reading, writing and reviewing articles. 相似文献
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Mary Dabney Wilson Jodi Lynn Spillane Colleen Cook Anne L. Highsmith 《Library Collections, Acquisitions, and Technical Services》2000,24(4)
Subject headings for individual works of fiction have appeared on LC cataloging copy from the inception of the OCLC/LC Fiction Project in 1991. This study seeks to determine whether there is any relationship between the number of subject or genre headings per fiction record and mean circulation per record. Analysis of results indicates that no statistically significant correlation exists. Recommendation for a similar analysis of data from a public library is made. 相似文献
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《Journal of Web Librarianship》2013,7(4):309-331
Perhaps the greatest power of folksonomies, especially when set against controlled vocabularies like the Library of Congress Subject Headings, lies in their capacity to empower user communities to name their own resources in their own terms. This article analyzes the potential and limitations of both folksonomies and controlled vocabularies for transgender materials by analyzing the subject headings in WorldCat records and the user-generated tags in LibraryThing for books with transgender themes. A close examination of the subject headings and tags for twenty books on transgender topics reveals a disconnect between the language used by people who own these books and the terms authorized by the Library of Congress and assigned by catalogers to describe and organize transgender-themed books. The terms most commonly assigned by users are far less common or non-existent in WorldCat. The folksonomies also provide spaces for a multiplicity of representations, including a range of gender expressions, whereas these entities are often absent from Library of Congress Subject Headings and WorldCat. While folksonomies are democratic and respond quickly to shifts and expansions of categories, they lack control and may inhibit findability of resources. Neither tags nor subject headings are perfect systems by themselves, but they may complement each other well in library catalogs. Bringing users’ voices into catalogs through the addition of tags might greatly enhance organization, representation, and retrieval of transgender-themed materials. 相似文献
5.
This paper describes the procedures used at the Library of the College of Physicians of Philadelphia to divide its ninety-year-old dictionary card catalog. The division was necessitated by overcrowding, obsolete subject headings, and lack of a complete authority list which resulted in like materials being scattered throughout the catalog under several headings. Two catalogs were created: the historical-biographical catalog, representing all works published before 1950 and all works of historical or biographical nature; and the current catalog, containing all works published from 1950 on, excepting historical or biographical materials. The 1950- catalog was further divided into name and subject catalogs, and the subject section was revised according to MeSH. The project was completed in about two years. As a result, searching time has been much reduced, and the library is able to take advantage of the annual revisions of MeSH to update the subject catalog. 相似文献
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The fictitious phenomenon of document headings applies to that the document headings contradictthe intellectual content,thus the headings cannot truly reflect the content and the key words fall to re-veal exactly the subject of the document.The heading in 相似文献
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This paper presents a method for comparing the subject headings of Scopus and WoS classifiers that has been tested based on examples in the field of mathematical disciplines. Semantic relationships of subject headings are explored by using intelligent analysis of keyword and expression clustering. The results are presented in the form of a correspondence table for the subject headings of the classifiers. 相似文献
8.
目前科技论文中热重分析曲线图标目的编辑加工没有一个统一的或者相对统一的标准,致使科技论文中热重分析曲线图标目的表达形式较为混乱,文中汇总了目前科技论文中最为常见的热重分析曲线图标目的表达形式,并一一进行剖析,指出了这些常见表达形式存在的错误;最后从科学性和规范性角度,指出了编辑加工热重分析曲线时需注意的一些要点,并给出了编辑加工热重分析曲线图标目的建议. 相似文献
9.
Fenske RE 《Bulletin of the Medical Library Association》1972,60(2):319-324
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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《Cataloging & classification quarterly》2013,51(2):93-100
Nine principles are proposed to formulate a consistent policy for form of names for literatures in LC subject headings. The proposals in part conform with existing LC headings and in part suggest new types of headings. 相似文献
12.
由于医学文献的主要主题词和次要主题词在文献中所反映出的重要程度不同,因此在预处理过程中首将主要主题词和次要主题词进行加权处理.在主题速选阶段采用改进信息熵算法对主题进行遴选,最后利用词分析中的战略坐标分析对热点主题进行描绘. 相似文献
13.
共词分析法应用的规范化研究——主题词和关键词的聚类效果对比分析 总被引：2，自引：0，他引：2
14.
《Cataloging & classification quarterly》2013,51(3-4):1-29
Seven clusters of headings on three levels of generalization, listed in Library of Congress Subject Headings, 9th edition, representing types of concepts pertaining to the study of society, society itself, and its various types of social units, are analyzed for their hierarchical relationships. Eighty-three headings in the clusters Sociology and Family are found to be overrelated, while 112 headings are underrelated in Social structure. Community, Social institutions. Age groups and social classes. Suggestions are offered for restructuring some hierarchical relationships, and the need for the development of a comprehensive code for establishing headings is emphasized. 相似文献
15.
《Cataloging & classification quarterly》2013,51(1):89-105
The problems of culture and ideology have been studied in phenomenology, structuralism, and historical materialism, but they fail to make connections between theory and social reality. To solve this situation, Pierre Bourdieu proposes the Theory of Practice. This Theory of Practice, together with his notions of Cultural capital, Field, Habitus, Social reproduction, Symbolic power, and so on, are the subjects of 23 books written by Bourdieu up to 1991. Because the purpose of Library of Congress Subject Headings (LCSH) is to guide users to the subject(s) of a given book, one would expect to find those conceptual categories present in the subject headings assigned to Bourdieu's books. This paper is a study of the subject headings given to those 23 books, and their different translations into English, Spanish, Portuguese, and German, comprising 89 records in OCLC as of December 1991. However, due to lack of availability one book and its respective record were eliminated, reducing the universe to 22 books and 88 records. It was found that most of the books erroneously received headings that do not correspond to their content, as the headings were assigned from the functi onalist paradigm. In general, LCSHs ignore the conceptual categories of other paradigms, do not match the current vocabulary used by social scientists, and are ideologically biased. 相似文献
16.
Towards enhancing retrieval effectiveness of search engines for diacritisized Arabic documents 总被引：1，自引：1，他引：0
Bassam H. Hammo 《Information Retrieval》2009,12(3):300-323
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《Cataloging & classification quarterly》2013,51(1):35-44
Pattern indexing is an attempt at combining standardized and free indexing. In contrast to prevailing indexing methods, notably precoordinated ones, pattern indexing also takes into consideration the terminological and information retrieval habits in certain displines of science. It is based on patterns consisting of subject categories reflecting the conceptual and methodological framework of a given discipline. These categories provide structured sets of standardized subject headings. To allow for flexibility and adequacy, these headings may be complemented by free indexing terms. Pattern indexing is intended to mend opaque catalog structures and terminological uncertainties of topical subject headings in common precoordinated indexing practice. Pattern indexing is discussed in the context of literary scholarship. 相似文献
19.
通过对CALIS西文联合数据库中个人名称标目的整理,分析了CALIS西文联合目录数据库中个人名称标目存在的质量问题,并提出了正确著录的方法和改进个人名称标目质量的措施。 相似文献
20.
对科技期刊中英文文章里阿拉伯数字的使用原则作了比较。在大多数情况下中英文都倾向于使用阿拉伯数字,只有计数(非计量)单位前的数字而且数字较少时,中文倾向于使用数字而英文倾向使用文字。 相似文献