共查询到20条相似文献，搜索用时 31 毫秒
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C C Chen 《Bulletin of the Medical Library Association》1974,62(3):296-301
This is the third part of a comprehensive, quantitative study of biomedical book reviewing. The data base of the total project was built from statistics of 3,347 reviews of 2,067 biomedical books appearing in all 1970 issues of fifty-four reviewing journals. This part of the study explores the duplication patterns in book reviewing among these media. It is found that 35.17% (727 books) of the 2,067 titles were reviewed more than once in 1970, these titles accounting for 2,007 of the total of 3,347 reviews. For the most part, reviews of the most frequently reviewed titles appeared in such journals as British Medical Journal, Annals of Internal Medicine, Lancet, Journal of the American Medical Association, and New England Journal of Medicine. These five journals covered 93.53% of the 727 books reviewed more than once in 1970. 相似文献
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引进版图书的选题开发既要服务于出版产业发展的需要,又要服务于文化建设的需要。本文尝试从问题的角度入手探讨引进版图书选题的开发模式,以解决长期困扰出版社的引进什么、怎样引进、如何使引进版图书既产生社会效益又产生经济效益的问题。 相似文献
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W Moll 《Bulletin of the Medical Library Association》1969,57(3):267-271
This Basic Journal List of forty-eight journal titles is intended as a selection guide for the librarian of the small hospital. It is based on a survey of physicians in Virginia who were asked to review journal titles contained in the 1967 edition of a list compiled by Mr. Alfred N. Brandon. The List is designed for the library in a hospital of from 100 to 300 beds and for the active clinician. 相似文献
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分析百度学术提供的引文存在的诸多纰漏:对期刊更名前的文献错误地用新刊名,给某些英文期刊的刊名添加多余信息,电子期刊论文的引文著录存在多余期号,无规律性的细小差错较多.提醒期刊编辑审稿、加工参考文献时切忌直接复制百度学术提供的引文来替换作者原稿中的参考文献,而应根据百度学术提供的原文链接找到原始文献,对照原文来规范参考文献,做到著录格式规范、著录内容正确、引用内容合理. 相似文献
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《Library & information science research》2005,27(2):190-202
To help users find their way around the large number of titles available, public libraries organize the collection by placing titles on shelves by genre, by adding classification codes in their online catalogs, and by pictograms on book covers. However, users may have different perceptions of how titles are to be grouped in genres or categories. Public library collections will be more accessible when the way their collection is organized matches these users' perceptions. The authors show how user perceptions can be derived from library loan transaction data. To overcome the particular methodological issues in using such data, a method of ultrametric trees and latent class analysis is developed to determine segments of users and how they categorize the collection. Results show clear user categorizations that in particular respects differ from conventional public library categorizations. 相似文献
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《Journal of Informetrics》2020,14(4):101066
Author keywords for scientific literature are terms selected and created by authors. Although most studies have focused on how to apply author keywords to represent their research interests, little is known about the process of how authors select keywords. To fill this research gap, this study presents a pilot study on author keyword selection behavior. Our empirical results show that the average percentages of author keywords appearing in titles, abstracts, and both titles and abstracts are 31%, 52.1%, and 56.7%, respectively. Meanwhile, we find that keywords also appear in references and high-frequency keywords. The proportions of author-selected keywords appearing in the references and high-frequency keywords are 41.6% and 56.1%, respectively. In addition, keywords of papers written by core authors (productive authors) are found to appear less frequently in titles and abstracts in their papers than that of others, and appear more frequently in references and high-frequency keywords. The percentages of keywords appearing in titles and abstracts in scientific papers are negatively correlated with citation counts of papers. In contrast, the percentages of author keywords appearing in high-frequency keywords are positively associated with citation counts of papers. 相似文献
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B T Usdin 《Bulletin of the Medical Library Association》1979,67(2):212-217
Five core lists of medical journals are compared with respect to size, intended users, and content. Despite variations in scope and depth, there is significant agreement among the lists. A list of the seventy-two titles appearing on four or all of the five lists is appended. There is no clear relationship between frequency of inclusion in these core lists and citation frequency as reported in Journal Citation Reports. 相似文献
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D Cunningham S Grefsheim M Simon P S Lansing 《Bulletin of the Medical Library Association》1991,79(1):45-52
The second part of the biotechnology awareness study focused on health sciences libraries and how well they are meeting the needs of biotechnologists working in the study's nine medical centers. A survey was conducted over a three-month period to assess the demand for biotechnology-related reference services at nine libraries and the sources the librarians used to answer the questions. Data on monographic and current serial holdings were also collected. At the end of the survey period, librarians were asked for their perceptions about biotechnology research at their institutions and in their geographic areas. Their responses were compared to the responses the scientists at the nine schools gave to the same or similar questions. Results showed few biotechnology-related reference questions were asked of the librarians. The recorded questions dealt with a range of biotechnology subjects. MEDLINE was used to answer 77% of the questions received during the survey period. More detailed notes in MeSH and a guide to online searching for biotechnology topics were suggested by the librarians as ways to improve reference service to this group of researchers. Journal collections were generally strong, with libraries owning from 50% to 87% of the titles on a core list of biotechnology journals compiled for this study. All libraries subscribed to the five titles most often cited by the scientists surveyed. Generally, librarians were unaware of the biotechnology-related research being done on their campuses or in their geographic areas. 相似文献
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从《化学文摘》对摘要的修改看英文摘要撰写的常见问题 总被引：6，自引：3，他引：3
Common defects in English abstract writing deduced from analysis of abstracts corrected by Chemical Abstracts 相似文献
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Journal print archives or repositories have been in existence for some time. More recently, the academic libraries in the United States Pacific Northwest that belong to the Orbis Cascade Alliance undertook the development of a distributed repository to preserve the print journals from the American Chemical Society and the JSTOR Arts and Sciences I & II collections. The project sought to identify two complete runs of each title held between the members of the consortium and assign responsibility for preserving the titles in perpetuity. The methodology, challenges, and benefits of this project are discussed. 相似文献
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《Library & information science research》2006,28(2):281-296
This article analyzes the bibliometric features (the number of pages, completion years, the fields of subject, the number of citations, and their distribution by types of sources and years) of 100 theses and dissertations completed at the Department of Librarianship of Hacettepe University between 1974 and 2002. Almost a quarter (24%) of all dissertations were on university libraries, followed by public libraries (9%). Doctoral dissertations were, on average, twice as long as master's theses and contained 2.5 times more citations. Monographs received more citations (50%) than journal articles did (42%). Recently completed theses and dissertations contained more citations to electronic publications. Fourteen (or 3.2% of all) journal titles (including Türk Kütüphaneciliği, College & Research Libraries, and Journal of the American Society for Information Science) received almost half (48.9%) of all citations. Eighty percent of journal titles were cited infrequently. No correlation was found between the frequency of citations of the most frequently cited journals and their impact factors. Cited journal titles in master's and doctoral theses and dissertations overlapped significantly. Similarly, journal titles cited in dissertations also overlapped significantly with those that were cited in the journal articles published in the professional literature. The distribution of citations to foreign journal titles fit Bradford's Law of Scattering. The mean half-life of all cited sources was 9 years. Sources cited in master's dissertations were relatively more current. Single authorship was the norm in cited resources. Coupled with in-library use data, findings of the present study can be used to identify the core journal titles in librarianship as well as to evaluate the existing library collections to decide which journal titles to keep, discard, or relegate to off-site storage areas. 相似文献
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《Library Acquisitions: Practice & Theory #》1998,22(2):147-159
This paper investigates the usefulness of ISI Journal Impact Factors in making serial selection and deselection decisions. It shows that Impact Factors do not remain relatively constant from year to year; specifically, the rank order of 56 ecology titles was found to vary considerably over time. The median year-to-year variation in Impact Factors was found to be 21.9%, and the average variability of Impact Factors over a five-year period was 13.2%. The study also found a considerable degree of overlap in the average Impact Factor of serials in the ISI’s Ecology category. These findings cast doubt on the usefulness of relying on a single year’s JCR (Journal Citation Reports) to make informed selection/deselection decisions. 相似文献
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Stevens SR 《Bulletin of the Medical Library Association》2000,88(2):172-177
The major purpose of this study was to identify and assess indexing coverage of core journals in cytotechnology. It was part of a larger project sponsored by the Nursing and Allied Health Resources Section of the Medical Library Association to map the literature of allied health. Three representative journals in cytotechnology were selected and subjected to citation analysis to determine what journals, other publication types, and years were cited and how often. Bradford's Law of Scattering was applied to the resulting list of cited journals to identify core titles in the discipline, and five indexes were searched to assess coverage of these core titles. Results indicated that the cytotechnology journal literature had a small core but wide dispersion: one third of the 21,021 journal citations appeared in only 3 titles; another third appeared in an additional 26 titles; the remaining third were scattered in 1,069 different titles. Science Citation Index Expanded rated highest in indexing coverage of the core titles, followed by MEDLINE, EMBASE/Excerpta Medica, HealthSTAR, and Cumulative Index to Nursing and Allied Health Literature (CINAHL). The study's results also showed that journals were the predominantly cited format and that citing authors relied strongly on more recent literature. 相似文献
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David Zopfi-Jordan 《Journal of Interlibrary Loan, Document Delivery & Electronic Reserve》2013,23(4):457-476
The Interlibrary Loan and Document Delivery Department train staff, updates manuals, compiles statistics, trains staff, follows copyright guidelines, and performs other relevant duties. Knowledge of copyright guidelines is an important factor that affects decisions on whether to borrow or purchase. Practices and procedures of other institutions guide decisions about how an interlibrary loan and document delivery department operates on a day-to-day basis. The titles in this annotated bibliography will help to guide interlibrary loan practitioners to texts with information on specific topics. This annotated bibliography lists titles with historical, statistical, practical, and useful information on how to operate and manage the interlibrary loan unit. 相似文献
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图书情报学核心期刊论文标题计量分析研究 总被引：4，自引：1，他引：4
从中文科技期刊数据库(重庆维普)选取了1989年到2005年的17种图书情报学核心期刊(2004版)的所有论文,滤掉会议通知、征稿简则、年度索引等非正式论文后,利用VBA对42989篇文献的标题进行统计分析。统计结果表明,标题长度符合正态分布,标题的句型相对比较集中。大多数作者会从标题中抽出一至三个关键词。标题中的停用词与动词分布相对集中,而题首词、题尾词以及题含关键词分布相对分散一些。对标题的规律性分析有利于进一步指导标题的拟定,计量分析的结果为后续的摘要分析以及正文内容分析提供了一些基础数据。 相似文献
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《The Reference Librarian》2013,54(27-28):177-183
Classification of periodicals can be done for either of two reasons- to place bound periodical volumes in the stacks close to monographs on the same subject or to organize the volumes in a separate periodicals area. Either reason provides a key to locating periodicals that does not depend on the patron's ability to interpret spine titles, title changes, or changing cataloging codes. If the choice is to integrate bound periodical volumes with the monographs, the same classification system must be used. For a separate bound periodicals area, many libraries have developed schemes to organize their titles on the shelves in alphabetical order by entry. Which choice is best depends on where a library chooses to shelve its periodicals and how the library staff believes patrons approach the task of finding titles. 相似文献
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数字资源获取对科学研究的影响—电子期刊全文下载与引用分析 总被引：4，自引：0，他引：4
根据中国科学院国家科学图书馆构建的数字资源环境,以化学领域的15种电子期刊为统计分析样本,分析2003-2005年的全文下载量。利用中国科学引文数据库中国科学院著者引用这15种期刊的引用数据,分析下载行为与引用行为相关的关系。通过数据的统计分析,可以看出数字资源对科学研究行为的影响:期刊全文的高下载量为持续状态;期刊下载行为与期刊引用行为的趋势基本一致;高下载量的期刊引用次数也比较高;下载量低的期刊引用量也比较低。以期刊下载量为自变量,期刊的引用量为因变量,进行线性相关分析。利用皮尔松Person相关系数公式计算证明了下载行为与引用行为存在正向相关关系。 相似文献