共查询到20条相似文献，搜索用时 46 毫秒
1.
Bibliography of Bioethics and Index Medicus: comparison of coverage, publication delay, and ease of recall for journal articles on bioethics 总被引：1，自引：0，他引：1
S S Marsh 《Bulletin of the Medical Library Association》1987,75(3):248-252
Citations selected from the bibliographies of recent texts, a specialized subject bibliography, and review articles were checked in both Cumulated Index Medicus (IM) and the Bibliography of Bioethics (BB) to compare coverage, publication delay, probable causes of indexing and retrieval failure, and the ease with which relevant citations were retrieved. The study also attempted to determine whether BB included appropriate articles from the MEDLINE database in a timely and systematic manner. While 98% of the IM citations appeared within a year of publication, 79% of the BB citations appeared two to three years after their publication dates. The average citation appeared twice as frequently in IM as in BB. 相似文献
2.
M J Ruhl 《Bulletin of the Medical Library Association》1967,55(1):70-74
The Index of Rheumatology is a newly-developed, recurring bibliography produced by the Medical Literature Analysis and Retrieval System (MEDLARS) of the National Library of Medicine. It is published semimonthly by the American Rheumatism Association. This report describes preliminary testing of MEDLARS output, modification of MEDLARS Medical Subject Headings (MeSH), and the computer formulation for retrieval of the bibliographic citations comprising the Index. 相似文献
3.
包祖军 《中华医学图书馆杂志》2011,(3):78-80,F0003
以维普“中文科技期刊数据库”、清华同方“中国期刊全文数据库”和万方学术期刊数据库为数据源,检出2000—2009年国内期刊上发表的有关高职高专文献检索课教学研究的论文336篇,并对其年代分布、作者分布、著者合作度、基金论文和被引情况等进行了分析探讨,对我国高职文献检索课的发展提出参考意见。 相似文献
4.
J K Miller 《Bulletin of the Medical Library Association》1970,58(3):378-397
The purpose of this study was to determine if a computerized commercial selective dissemination of information service could contribute to the services offered to the patrons of a specific medical library who were already participating in a manual selective dissemination of information service. The citations generated by the two services were contrasted on the basis of literature coverage, timeliness of retrieval, and relevancy of output. Eighty-four percent of the discrete citations retrieved were from 664 periodicals subscribed to by both services. Only 16 percent of the total of 1,387 discrete citations were produced by both services. The manual service was more timely; and, although it produced fewer citations, a higher percentage of these were relevant. Numerically, a total of 346 useful citations were recovered by the manual service and 379 from the commercial service. It appears, therefore, that a computerized commercial SDI service could contribute to the services offered to the medical scientists participating in a manual SDI service. 相似文献
5.
《Journal of Informetrics》2014,8(4):912-916
This paper examined the citation impact of Chinese- and English-language articles in Chinese-English bilingual journals indexed by Scopus and Web of Science (WoS). Two findings were obtained from comparative analysis: (1) Chinese-language articles were not biased in citations compared with English-language articles, since they received a large number of citations from Chinese scientists; (2) a Chinese-language community was found in Scopus, in which Chinese-language articles mainly received citations from Chinese-language articles, but it was not found in WoS whose coverage of Chinese-language articles is only one-tenth of Scopus. The findings suggest some implications for academic evaluation of journals including Chinese-language articles in Scopus and WoS. 相似文献
6.
C Kenton 《Bulletin of the Medical Library Association》1966,54(2):135-137
Recurring bibliographies are by-products of the MEDLARS system which are prepared by the National Library of Medicine in collaboration with nonprofit scientific and professional societies and institutions and government agencies that represent a specialty area of biomedical research or practice. The sponsor generally assumes responsibility for the costs of publication and distribution. At present MEDLARS has a planned capacity of fifty such recurring bibliographies. The subject parameters and format are defined by the representatives of the sponsoring organization and the NLM Search, MeSH, and Index staffs. As citations are regularly put into the MEDLARS store, each one that qualifies for a recurring bibliography is identified and tagged by the computer with the number assigned to the pertinent RB. The MEDLARS store is searched for citations for a particular recurring bibliography according to the schedule specified by the sponsoring organization, and the output is printed from a GRACE tape. 相似文献
7.
The promotion of scholarly journal articles to journalists and bloggers via the dissemination of press releases generates a positive impact on the number of citations that publicized journal articles receive. Research by John Wiley & Sons, Inc. shows that article‐level publicity efforts and media coverage boosts downloads by an average of 1.8 times and were found to increase citations by as much as 2.0–2.2 times in the articles analyzed in this study. We evaluated scholarly journal articles published in nearly 100 Wiley journals, which were also covered in 296 press releases. The results in this case study suggest a need for greater investment in media support for scholarly journals publishing research that sparks interest to a broad news audience, as it could increase citations. 相似文献
8.
S D Truelson 《Bulletin of the Medical Library Association》1966,54(4):329-336
The main criterion for selecting journals for indexing in Index Medicus, and thereby largely in MEDLARS, is quality. Subject scope varies with the voiced needs of the biomedical community. The Index aims to cover the best journals in all relevant subject fields, but the percentage of journals on a subject indexed depends on the quality of each journal. Country and language coverage depends on quality, even in the case of the best journals of each, although American biases may affect such selection. While a number of guidelines exist for identifying quality journals, information necessary to apply them confidently is often difficult to obtain. The National Library of Medicine is advised by an Ad Hoc Panel on the Selection of Journals for Index Medicus, composed both of NLM officers and extramural members. Criticism has been voiced that too many titles are indexed, compared with titles actually used, but no meaningful statistics of use exist which can identify titles which should be excluded from indexing. Continuing suggestions from users regarding titles indexed would benefit everyone. 相似文献
9.
10.
《Library & information science research》2006,28(3):453-459
Journals, which were earlier published in print-only version, are now published in both the online and print versions. It has been established that online versions, free or not, have greater impact over the print version. But there is a difference between the dates of publication of the online and print version of the same journal. This is called the delay measured in terms of days. The purpose of this study is to find the average time delay. For this, data for more than 200 journals of various subjects from different publishers have been manually acquired for publications during the first 6 months of year 2005. Further subject-wise investigation was made during the last month of the year 2005. The average delay is found to be nearly 3 months, but it varies for different publishers. Also, the issue of large deviation from the average delay – as noted in some journals – will be discussed here. 相似文献
11.
Many journals post accepted articles online before they are formally published in an issue. Early citation impact evidence for these articles could be helpful for timely research evaluation and to identify potentially important articles that quickly attract many citations. This article investigates whether Microsoft Academic can help with this task. For over 65,000 Scopus in-press articles from 2016 and 2017 across 26 fields, Microsoft Academic found 2–5 times as many citations as Scopus, depending on year and field. From manual checks of 1122 Microsoft Academic citations not found in Scopus, Microsoft Academic’s citation indexing was faster but not much wider than Scopus for journals. It achieved this by associating citations to preprints with their subsequent in-press versions and by extracting citations from in-press articles. In some fields its coverage of scholarly digital libraries, such as arXiv.org, was also an advantage. Thus, Microsoft Academic seems to be a more comprehensive automatic source of citation counts for in-press articles than Scopus. 相似文献
12.
One hundred sixty-five search requests processed through the SUNY Biomedical Communication Network were analyzed to determine how many of the citations thus retrieved would have been retrievable by MEDLINE. The results showed that MEDLINE would have been capable of retrieving 78.7% of the SUNY citations. Almost half of the 21.3% of the citations not retrievable by MEDLINE were from foreign-language journals. A subject analysis of the data showed that in most subject areas MEDLINE was able to provide a relatively small percentage of the journal titles generated by SUNY. These few titles, however, contained a large percentage of the SUNY citations involved in the study. 相似文献
13.
W Moll 《Bulletin of the Medical Library Association》1971,59(3):458-462
The paper reviews the highlights of a four-week trial period (November 19-December 18, 1970) during which the Medical Library of the University of Virginia experimented with a new remote-access bibliographical control and retrieval system via its TWX machine. The system, called AIM-TWX, was sponsored by the Lister Hill National Center for Biomedical Communications and utilizes a timeshared IBM 360/67 computer in Santa Monica, California. Citations from 109 clinically-oriented journals from 1966 to date, including those currently included in the Abridged Index Medicus, may be retrieved either on- or off-line.Various aspects of this service are described, including problems of staffing, training, and record keeping, as well as the role of the MeSH vocabulary which is the principle "language" of the man-computer dialog.The statistical results indicated that the system was used for approximately 200 minutes on nineteen days and that an average of sixteen searches were run on any given day, or about 4.6 searches per hour of use. In spite of an inexperienced staff who had little knowledge of the MeSH vocabulary and whose training schedule was limited to one four-hour session, the experiment was highly successful in terms of searches and citations.At the end of the period, 298 searches had been run for 114 requestors, and 5,343 citations had been produced. Only fifty-five searches yielded no citations. The experiment generated a great deal of excitement and interest among the staff of the Library and of the Medical Center. Moreover, a large number of medical practitioners in large and small communities of Virginia participated in this experiment, indicating that there exists a great demand for this type of literature searching which AIM-TWX is able to provide with great rapidity. 相似文献
14.
15.
科技期刊编辑不仅要能够严格规范参考文献著录格式,还应利用文献检索技能、专业知识挖掘隐蔽性差错,向作者提出合理的修改意见,从而提高论文质量。 相似文献
16.
J Egeland 《Bulletin of the Medical Library Association》1975,63(2):189-194
The SUNY Biomedical Communication Network became operational in 1968 as the first on-line bibliograhpic retrieval service for biomedical literature. Since 1968, the SUNY/BCN has grown in size from nine to thirty-two medical and university libraries and has expanded its data base coverage to include the ERIC and Psychological Abstracts data bases in addition to the full ten-year retrospective MEDLARS data base. Aside from the continuous provision of an on-line searching system, the SUNY experience over the last six years has yielded valuable information in the following areas of: (1) monograph indexing and retrieval, (2) shared cataloging, (3) user interaction and education in on-line systems, and (4) member participation in Network policy-making processes. The continued success of the SUNY/BCN is evidence that it is possible to provide a high quality on-line bibliographic retrieval system at cost to academic institutions. SUNY's success in this effort is the result of centralized resource sharing and effective regional networking, combined with thoughtful planning by user advisory committees. 相似文献
17.
The purpose of this study was to identify core journals and the databases that provide access to these journals for the field of dental assisting. This study was completed as a part of the Medical Library Association (MLA) Nursing and Allied Health Resources Section's project to map the literature of allied health. There were three original journals selected for analysis using the prescribed methodology, Dental Assistant, the journal of the American Dental Assistants Association; Journal of the CDAA, the journal of the Canadian Dental Assistants' Association; and Dental Teamwork, published by the American Dental Association. Dental Teamwork ceased publication in December 1996; however, it was considered a necessary part of the analysis due to its extensive coverage of dental assisting as well as its numerous scientific articles with references. In Dental Assistant, there were 16 source articles, containing 206 citations. In Dental Teamwork, there were 31 source articles with 308 citations. In Journal of the CDAA, there were only 3 source articles with 14 citations. Bradford's Law of Scattering was applied to the journal citations. Four databases, MEDLINE, the Cumulative Index to Nursing and Allied Health Literature, EMBASE/Excerpta Medica, and HEALTH were analyzed for their coverage of these cited journals. This study may encourage the dental assisting profession to take a close look at its existing journals and to consider enhancing the content of these journals or the publication of additional journals in the field. Dental assistants of today need substantive literature that deals with all aspects of their chosen profession in order to meet the challenges of providing dental health care in the future. 相似文献
18.
在中国知网上检索2006-2015年工程类期刊有关自身更正声明的文献,分析我国期刊更正声明的现状:数量逐年增多,但是与国际期刊相比,差距尚较大;各个期刊更正声明的撰写各有其特色,但部分期刊的更正声明不规范;更正被检索与被利用的程度较低.建议:期刊应增强更正的理念;从题名、关键词以及期刊数据库等方面提高更正的可检索性;在题名、正文和落款上规范更正声明的撰写. 相似文献
19.
《Journal of Informetrics》2014,8(1):13-24
The time evolution of mean received citations is calculated on a sample of journals from two ISI subject categories (“Chemistry, multidisciplinary”, ISI Science Edition, and “Management”, ISI Social Science edition) with the use of an original methodology. Mean received citations are plotted against the time gap in years existing between publication of the cited article and received citations. For most Chemistry journals in the sample the maximum number of average received citations occurs two years after publication, and then a decrease is experimented. Some peculiar cases present a different trend. Management journals, conversely, do not present in most cases a peak of citations: average received citations instead grow from year of publication to the age of 10 years (maximum time gap studied). A subsample of journals show similar results for longer time series (up to 23 years). Medians of average received citations per year partly show a similar behavior. Results suggest that citedness follows very different trends in very different fields, and partly suggest why differences in Journal Impact Factor exist between different categories. At the end of the work conclusions are drawn, together with suggestions for future research. 相似文献
20.
The purpose of this research was to determine which of three databases, CINAHL, EMBASE or MEDLINE, should be accessed when researching nursing topics. The three databases were searched for citations on topics selected by three nurse researchers and the results were compared. For the search of nursing care literature on a medical condition, it was helpful to search both CINAHL and MEDLINE. CINAHL provided the majority of relevant articles for the second search, on computers and privacy, but inclusion of MEDLINE and EMBASE enhanced retrieval somewhat. The search on substance abuse in pregnancy, not restricted to nursing literature, retrieved better results when searching both MEDLINE and EMBASE. Due to the nature and distribution of the nursing literature, it is especially important for the searcher to understand and respond to the focus of the researcher. 相似文献