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MEDTUTOR is an interactive, microcomputer-based training package designed to teach medical and health professionals, as well as librarians and information specialists, how to use MEDLINE effectively. The objective of MEDTUTOR is to provide a comprehensive package for teaching the various commands and search techniques required for utilizing the MEDLINE database through the MEDLARS system. MEDTUTOR's menu-driven design allows novice users to learn about the content and use of MEDLINE, such as author searching, text word searching, MeSH indexing, etc., at their own pace and with considerable program feedback. In addition, MEDTUTOR provides the skilled searcher with a way to reinforce or recall previously-learned search techniques without incurring online charges. MEDTUTOR may be used in place of formal training, as a precursor to or as a refresher following formal training, or for review of a particular concept. It provides inexpensive and easily accessible instruction for searching MEDLINE. 相似文献
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Public librarians in South Korea assist users in obtaining information on a variety of topics. However, health-related information and services have a lower profile than other services due to a perceived lack of librarian expertise in searching and evaluating health resources. Although public library users are actively seeking health information, it has become critical for both public librarians and users to develop skills for using and evaluating Internet health resources. Therefore, this study was conducted to identify a set of useful criteria to evaluate online health web sites for both librarians and library users. From a comprehensive literature review, 33 criteria related to health website evaluation were identified. Using this set of criteria, South Korean public librarians and users were asked to rate the importance of each criterion in surveys. A strong consensus was found between the two groups. The top 10 most highly rated criteria from both groups were identified and compared. The results led to the development of an initial set of 12 evaluation criteria for health websites. It is expected that the final set of criteria will be used by public librarians to recommend the best health websites to their users. Although the study was conducted in South Korean public libraries, the findings are applicable in providing evaluation services of health websites to libraries worldwide. 相似文献
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Lora V. Gault Mary Shultz Kathy J. Davies 《Journal of the Medical Library Association》2002,90(2):173-180
Objectives: This study compared the mapping of natural language patron terms to the Medical Subject Headings (MeSH) across six MeSH interfaces for the MEDLINE database.Methods: Test data were obtained from search requests submitted by patrons to the Library of the Health Sciences, University of Illinois at Chicago, over a nine-month period. Search request statements were parsed into separate terms or phrases. Using print sources from the National Library of Medicine, Each parsed patron term was assigned corresponding MeSH terms. Each patron term was entered into each of the selected interfaces to determine how effectively they mapped to MeSH. Data were collected for mapping success, accessibility of MeSH term within mapped list, and total number of MeSH choices within each list.Results: The selected MEDLINE interfaces do not map the same patron term in the same way, nor do they consistently lead to what is considered the appropriate MeSH term.Conclusions: If searchers utilize the MEDLINE database to its fullest potential by mapping to MeSH, the results of the mapping will vary between interfaces. This variance may ultimately impact the search results. These differences should be considered when choosing a MEDLINE interface and when instructing end users. 相似文献
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关于从MEDLINE数据库中进行知识抽取和挖掘的研究进展 总被引：28，自引：4，他引：24
本文对近年来国内外利用医学文献检索系统MEDLINE进行知识抽取和文本数据挖掘的研究进行了回顾和综述,包括Swanson等开展的从文献中发现隐藏的联系的研究,Cimino等人开展的从文献中抽取规则的研究,国外的共词及国内的共篇分析研究.并据此提出,在当前信息技术高速发展的条件下,应当充分开展知识抽取和文本挖掘的研究,为图书情报部门的服务功能从文献管理向信息管理和知识管理转化进行理论上的探索. 相似文献
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N S Hewison 《Bulletin of the Medical Library Association》1989,77(4):332-336
The emergence of CD-ROM (compact disc/read-only memory) versions of the MEDLINE database requires experienced MEDLINE searchers to examine assumptions about searching MEDLINE, since some expectations may not be fulfilled by this new technology. When applied to a particular CD-ROM MEDLINE product, the evaluation procedure involves testing assumptions concerning database contents; mechanics of searching; display, print, and download capabilities; and user-friendly features. The extent to which a CD-ROM product preserves and exploits important MEDLINE strengths should be assessed, e.g., the MeSH controlled vocabulary, the designation of major and minor MeSH emphasis, and the use of subheadings. Search software characteristics that affect ease of searching and quality of results also need to be examined, e.g., the ability to truncate search terms and the order of precedence in which Boolean operators are evaluated. A checklist to assist in the evaluation process is presented, including search examples for use in testing search functions. 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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Bronson RJ 《Medical reference services quarterly》1994,13(1):73-80
Locating notes about MeSH subheadings can be one of the most difficult aspects of MEDLINE searching. When used with Medical Subject Headings (MeSH), subheadings serve to limit or define the focus of a heading. National Library of Medicine (NLM) indexers, staff members who enter the MeSH indexing into the database, use subheadings freely. They do follow indexing conventions and savy searchers need to be aware of how to obtain basic subheading information to assist in search formulation. There are a number of methods which may be used in order to view subheading use notes. This column will provide an overview of some alternatives to locating such information. 相似文献
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This paper investigates the effectiveness of using MeSH® in PubMed through its automatic query expansion process: Automatic Term Mapping (ATM). We run Boolean searches based on a collection of 55 topics and about 160,000 MEDLINE® citations used in the 2006 and 2007 TREC Genomics Tracks. For each topic, we first automatically construct a query by selecting keywords from the question. Next, each query is expanded by ATM, which assigns different search tags to terms in the query. Three search tags: [MeSH Terms], [Text Words], and [All Fields] are chosen to be studied after expansion because they all make use of the MeSH field of indexed MEDLINE citations. Furthermore, we characterize the two different mechanisms by which the MeSH field is used. Retrieval results using MeSH after expansion are compared to those solely based on the words in MEDLINE title and abstracts. The aggregate retrieval performance is assessed using both F-measure and mean rank precision. Experimental results suggest that query expansion using MeSH in PubMed can generally improve retrieval performance, but the improvement may not affect end PubMed users in realistic situations. 相似文献
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To determine possible uses for MEDLINE in the hospital library, health practitioners requesting literature searches were provided with both a manual and a MEDLINE search. Patron receptivity to MEDLINE was good, but the manual search was more often preferred. The health practitioners responding to a questionnaire apparently had delegated literature searching and evaluation of material to the hospital librarians, especially when clinically related information was needed. In the community hospitals where both the search and the selection of material are the responsibility of the librarian, MEDLINE can be used as the primary search tool or to supplement material provided. 相似文献
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Nelson JL 《Medical reference services quarterly》1992,11(4):11-21
End users at the University of Southern California (USC) have free access to the last ten years of MEDLINE through a local online system known as USCInfo. Librarians at USC Norris Medical Library provide documentation and offer formal and informal training on the use of the system to search MEDLINE. To assess the educational needs of the end users, 643 searches were analyzed. Although a high proportion (84%) of the searches were judged to be successful, the use of medical subject headings (MeSH) to obtain optimal results was low; only 20% of all successful subject searches employed MeSH. Also, the advanced features of the system were underutilized. While it is promising to learn that many end users are obtaining positive results, methods which will encourage end users improve their retrievals need to be developed. 相似文献
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Allison MM 《Medical reference services quarterly》2003,22(1):39-55
The U.S. Government produces and provides massive amounts of statistics. Government initiatives have made much of the statistical information emanating from its various federal agencies, departments, and offices digitally accessible on the Internet. Assisting users in locating specific statistics can be one of the most challenging duties librarians have. This article provides a guide to government sources that will help librarians locate health statistics for researchers, health professionals, health consumers, and others. Some selected sites may be an endpoint of the search, and others may offer a solid beginning to a complex answer. Links are also provided to gateway Web sites, where a search strategy utilizing some of the tips discovered while compiling this list can be used to help promote successful outcomes. As always, it is recommended to use evaluative criteria to assess information quality as well as integrity of the data. 相似文献
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Through casual observations, formal consultations, and educational sessions, the authors have identified various indexing features of the National Library of Medicine's Medical Subject Headings (MeSH) that pose challenges to end users while attempting to obtain relevant retrieval when searching MEDLINE. These problematic features include the use of Explodes, Tree structures, subheadings, Text Word vs. subject heading searching, and central concept searching. End-user search software is becoming more sophisticated with an increasing number of choices offered for search strategy formulation. Methods of instruction to orient the end user to these systems will also have to become more detailed. A review of the literature, that discusses end-user problems with using MEDLINE and MeSH, is included. 相似文献
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Allison Estell 《Public Services Quarterly》2016,12(3):214-227
Librarians often act as default copyright experts at their institutions and thus must have an awareness of copyright law and practices. Nevertheless, there is little in the scholarly literature about how well informed librarians are about copyright law. Through a national survey of professional librarians, this study illustrates librarians’ self-perceived familiarity with copyright concepts, interests in training, and sources of support for copyright questions. The results will be of interest to library directors and library and information science (LIS) faculty and could inform curricular decisions in LIS schools and may also be applied to local professional development initiatives for librarians. 相似文献
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Objective:This study compares two maps of biomedical sciences using Medical Subject Headings (MeSH) term co-assignments versus MeSH terms of citing/cited articles and reveals similarities and differences between the two approaches.Methods:MeSH terms assigned to 397,475 journal articles published in 2015, as well as their 4,632,992 cited references, were retrieved from Web of Science and MEDLINE databases, respectively, which formed over 7 million MeSH co-assignments and nearly 18 million direct citation pairs. We generated six network visualizations of biomedical science at three levels using Gephi software based on these MeSH co-assignments and citation pairs.Results:The MeSH co-assignment map contained more nodes and edges, as MeSH co-assignments cover all medical topics discussed in articles. By contrast, the MeSH citation map contained fewer but larger nodes and wider edges, as citation links indicate connections to two similar medical topics.Conclusion:These two types of maps emphasize different aspects of biomedical sciences, with MeSH co-assignment maps focusing on the relationship between topics in different categories and MeSH direct citation maps providing insights into relationships between topics in the same or similar category. 相似文献
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Searching for patterns in the MeSH vocabulary 总被引：1，自引：0，他引：1
NLM revises its MeSH vocabulary annually to reflect changes in biomedical literature and the health sciences community. This study tested two hypotheses about NLM's MeSH vocabulary. The first is that new terms are added to MeSH when their broader terms have an increased number of postings. One examination compared the number of postings for the broader terms of new and existing terms in the current MEDLINE file; the other compared them over time. No significant statistical difference was found in either case. A second hypothesis--that there is a relationship between the patterns of MEDLINE indexing and searching and the organization of the MeSH tree structure--was tested by comparing the distribution of searched terms in the MeSH trees with the distribution of all terms. It was found that certain trees are searched more often than could be predicted by the overall term distribution, while others are searched less frequently than expected. In summary, (1) new terms cannot be predicted by the increase in postings of existing terms, and (2) searchers' and indexers' use of the terms' tree structure does not correlate with the terms' distribution in the MeSH trees. 相似文献
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Jane Harrison 《Health information and libraries journal》1997,14(1):33-42
Thepractice of evidence-based health care requires that information on methodology be identifiedfrom databases such as MEDLINE. Up until this year there have been no designated medicalsubject headings (MeSH) for evidence-based health care. ‘EVIDENCE-BASEDMEDICINE’ appears as a MeSH term from 1997. The absence of designated MeSH forthis concept prior to 1997 provides a challenge to the searcher. This paper describes the creationof a MEDLINE search strategy to retrieve articles on the methods of evidence-based health carepublished prior to the introduction of the new term, where an optimal combination of free-textand MeSH terms is required to identify relevant material. The study examines both free-text andsubject heading searching and attempts an optimal balance of sensitivity and specificity. It beginsby examining separate free-text and subject heading searches. Sensitivity of the subject headingsearch was 33% and specificity 80%, while the free-text search produced asensitivity of 50% and a specificity of 67%. The final strategy, combining bothapproaches, was more successful with sensitivity reaching between 82 and 90% andspecificity 83%. It is therefore possible to devise a search strategy to retrieve articles on themethods of evidence-based health care with relatively successful rates of sensitivity andspecificity. The limitations of MEDLINE, however, necessitate the use of additional approachesin identifying articles on the methods of evidence-based health care. 相似文献
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The Southeast Florida AIDS Information Network: a community outreach, specialized information system
In the years ahead, end-user instruction will expand from the current models of curriculum- and institution-based programs for teaching MEDLINE to include outreach programs to unaffiliated users for teaching specialized database searching. The Southeast Florida AIDS Information Network (SEFAIN), a community-based information system targeting health care providers in a tri-county area, is an example of this new model. The components of SEFAIN and the results of the outreach and educational programs are presented. The advantages of these programs to both providers and librarians are highlighted. Comparisons are drawn between end users who take specialized information courses and those who take MEDLINE courses or no courses. These data will assist librarians in the justification and development of specialized information systems. 相似文献
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《Medical reference services quarterly》2013,32(3):29-46
Through casual observations, formal consultations, and educational sessions, the authors have identified various indexing features of the National Library of Medicine's Medical Subject Headings (MeSH) that pose challenges to end users while attempting to obtain relevant retrieval when searching MEDUNE. These problematic features include the use of Explodes, Tree structures, subheadings, Text Word vs. subject heading searching, and central concept searching. End-user search software is becoming more sophisticated with an increasing number of choices offered for search strategy fomalation. Methods of instruction to orient the end user to these systems will also have to become more detailed. A review of the literature, that discusses end-user problems with using MEDLINE and MeSH, is included. 相似文献
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分析MeSH在PubMed、中国生物医学文献数据库、中国医院知识资源总库和万方医学网中的应用,总结出MeSH在医学信息检索中的三种应用机制,即直接使用主题词检索、实现自然语言或分类号向主题词的转换以及利用主题词等级范畴表进行知识导航,进而提出加强中文主题词表和中文一体化医学语言系统的构建与研究的建议。 相似文献