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1.
This study analyzes the search behavior of end users who had taken a class in searching MEDLINE on the National Library of Medicine's MEDLARS system. Of the class alumni, 58% obtained passwords. Most of these were still conducting their own searches twelve to eighteen months later. Telephone interviews and search observations indicated that these end users were satisfied with their results and felt they had mastered the basic mechanics of searching. However, appropriate use of explodes and subheadings, as well as locating appropriate search terms, still presented difficulties for them. Further training in these areas may be required. 相似文献
2.
C A Macias-Chapula 《Bulletin of the Medical Library Association》1988,76(4):334-338
A statistical analysis of MEDLARS usage by Mexico's National Health Information and Documentation Center (CENIDS) is described. A total of 13,029 connect hours was registered during the period 1977-1986. MEDLINE was the MEDLARS database most frequently used, representing 82.83% of total use. Some 41,563 online searches, requested by 30,775 users, were performed by CENIDS' headquarters staff during this period. Findings from this study will be used to further research on information services in order to maximize the effectiveness of existing resources. 相似文献
3.
This article provides a brief history of the development of the MEDLINE database and its huge impact within the UK, from its inception to the present time. The origins of MEDLINE can be traced back to a collection of books in the US Surgeon General's Office during the American Civil War and John Shaw Billings' decision, during 1867, to make this Library as complete as possible. From these beginnings, Index Medicus was developed in the early years of the 20th century, and electronic versions of the database began with the computerized on-demand search service MEDLARS in 1964 and then via CD-ROM and Internet Grateful Med to the web-based and free-to-all service, PubMed, in 1997. The response to PubMed was immediate and startling with usage increasing from 7 million searches per annum in 1996 to 400 million searches per annum in 2001 and the service continues to improve. MEDLINE providers are now offering mapping of natural language queries to the sophisticated indexing vocabulary (Medical Subject Headings, MeSH) and the provision of specific filters for different types of publication to improve searching efficiency, as well as links to full-text versions of the papers where available. The next steps are likely to involve an increased blurring of database and full-text boundaries, incorporating seamless access to the best available evidence within MEDLINE and a wide range of other information resources within a single search and to an increasing amount of full-text via various open-archive initiatives. As ever, the US National Library of Medicine is in the vanguard of research and further applications of its MEDLINE database for users within the UK will be awaited with great interest. 相似文献
4.
R F Lewis 《Bulletin of the Medical Library Association》1966,54(1):11-13
The National Library of Medicine has established at the Biomedical Library, UCLA, a remote MEDLARS search station. The agreement between the libraries provided that the Biomedical Library in cooperation with the UCLA Health Sciences Computing Facility would reprogram MEDLARS for the IBM 7094 computer, provide personnel to be trained in machine searching at NLM, and engage in a pilot demonstration of search service to the medical staff of UCLA. This paper describes the place of the search section in the organization of the Biomedical Library and the training of personnel at NLM (the article by Garvis in this issue of the Bulletin relates the problems encountered in making two different computer systems compatible). Search service had not begun when this paper was written; it was scheduled to begin late in 1965. Plans for the future include the enlargement of the UCLA MEDLARS staff and extension of search service to a larger geographical area. 相似文献
5.
E. A. Ovchenkova 《Scientific and Technical Information Processing》2011,38(2):83-92
This paper notes the interrelations between the types and methods of information searches, including Internet searches. It
suggests the general approach for making a search for documents on the Internet, for example, scientific articles on information
and communication. The methods for information searches used on the Internet are characterized with placing a particular emphasis
on the method of searching with the use of search systems. General recommendations for successful conduction of searches are
advanced to increase their efficiency. The goals and problems faced by a user during scientific information searches are presented.
A user’s rights for the results of a search for scientific information are described from the standpoint of legal relations
regulated by Russian legislation. Copyright protection methods are also considered based on Russian and foreign legislation. 相似文献
6.
OBJECTIVE: To evaluate the adequacy of the MEDLINE instruction routinely given to all entering medical students at the University of Miami School of Medicine and the ability of students to search effectively for and retrieve evidence-based information for clinical decision making by the end of their third-year. METHODOLOGY: The authors developed and implemented a strategy for evaluating the search strategies and articles selected by third-year students, who participated in the Objective Structured Clinical Examination (OSCE) in June 1996, 1997, and 1998, and reviewed the literature on evidence-based medicine and evaluation of medical student searches. RESULTS: A mean of 5% of the students' search strategies and a mean of 26% of articles selected were ranked "excellent" or "good"; a mean of 26% of search strategies were ranked "fair" and a mean of 69% were ranked "poor"; and a mean of 22% of articles selected were ranked "fair" and a mean of 52% were ranked "poor" based on the strategy developed to evaluate student searches. CONCLUSIONS: Evaluating medical student searches for evidence-based information is an effective way of evaluating students' searching proficiency, and, in turn, the adequacy of the instruction they receive. Based on the results of the OSCE test, the school of medicine expanded the library's educational role and the library implemented major changes in the training program. Information on evidence-based medicine is now incorporated into the MEDLINE instruction. Library faculty evaluate the required searches performed by students for evidence-based information during their first and second years; 30% of students are identified for follow-up, individualized instruction based on the evaluation; and a new case-based curriculum has been proposed with a fourteen-week problem-based learning (PBL) block. These developments are timely in light of the evidence-based competencies recently published by the Association of American Medical Colleges. 相似文献
7.
Darmoni SJ Benichou J Thirion B Hellot MF Fuss J 《Bulletin of the Medical Library Association》2000,88(2):152-156
OBJECTIVE: The purpose of this study was to evaluate the efficacy of a decentralized intranet access in each medical department as opposed to centralized unique MEDLINE access in the medical library. DESIGN: A two-phase questionnaire to evaluate MEDLINE use was given to junior and senior physicians at Rouen University Hospital (RUH). Phase I (August-October 1996) corresponded to a time period when centralized access was the only means of access available and phase II (August-October 1997) to a time period following the introduction of decentralized intranet access. RESULTS: A total of 168 physicians filled out at least one phase of the questionnaire, among whom 123 (73%) filled out both phases. Use of MEDLINE significantly increased in 1997 (average of 10.2+/-1.1 searches in three months) versus 1996 (average of 4.9+/-0.7 searches in three months, P<0.0001). The aim of searches changed, becoming significantly more care oriented in phase II (P<0.0001). The number of searches performed by the physicians alone increased (P<0.0001) and searches performed by the librarian decreased (P<0.0001) in phase II. The method of searches also changed, as searches by author (P< 0.0001), by journal (P = 0.0042), and by free word (P = 0.0027) increased in phase II. Knowledge of the following concepts of MEDLINE significantly increased: explosion (P<0.0001), scope note (P<0.0001), Abridged Index Medicus (AIM) journals (P<0.0001), Medical Subject Headings (MeSH) qualifier (P<0.0001), and focus (P<0.0001). CONCLUSION: A decentralized intranet access to MEDLINE increased the number of searches and knowledge of this bibliographic database. MEDLINE intranet access modified the purpose and the methods of searching. 相似文献
8.
Bibliographic retrievals on epilepsy prepared by MEDLARS and Excerpta Medica Foundation (EMF) monthly during 1968 were comparatively analyzed. EMF retrieved 1,116 citations with an average delay of 5.41 months, compared to 1,006 citations retrieved by MEDLARS with an average delay of 6.45 months. Differences in size of retrieval and delay between the systems were not significant. A total of 365 journals were represented, but a smaller group of ninety-one journals with citations in both retrievals formed a "core" of productive journals yielding over half the output of both systems. About 300 articles were cited in both searches, leaving 800 citations retrieved by EMF but not by MEDLARS and 700 citations retrieved by MEDLARS but not by EMF. Thus neither system was felt to provide comprehensive coverage of the epilepsy literature. Discrepancies in retrieval were found to be due primarily to indexing and retrieval procedures and not to coverage of different journals by the two systems. 相似文献
9.
L Sodergren 《Bulletin of the Medical Library Association》1973,61(4):400-407
The MEDLARS II effort, as it was developed until June 1971, is reviewed in terms of the overall planning process. How MEDLARS I was approached by NLM is discussed first and its objectives used for comparison. Certain technical, managerial, and intellectual aspects are outlined as types of problems encountered in designing MEDLARS II. While improvement upon the MEDLARS I seemed to be the main reason for planning a MEDLARS II, objectives became blurred and divergent as the project went along. The complexities of creating a central computerized data base of health sciences bibliographic information and library functional activities for nationwide use were underappreciated and remain a challenge to NLM. 相似文献
10.
R K Hsieh 《Bulletin of the Medical Library Association》1988,76(1):54-57
The National Library of Medicine (NLM) has a broad mission in biomedical information service. There are three major reasons for NLM, as a national institution, having an international program: first, the global nature of disease; second, the international scope of medical literature; and third, the universal goal of better communication. This paper reviews NLM's programs in relation to international medical information exchange: International MEDLARS Centers, collaboration with WHO and PAHO, NLM Special Foreign Currency Program, and development of the NLM collection. 相似文献
11.
《The Reference Librarian》2013,54(60):61-85
Summary This study examines the search tactics used by Web users to start their searches and deal with search problems such as too many postings and no relevant postings. Four search topics were developed to allow for comparison of search tactics used in four types of searches. The tactics analyzed include search statements, number of search statements, starting points, and tactics to solve the two search problems mentioned above. Search statements were searched in Alta Vista to determine their success and their nature was analyzed. With regard to the tactics used to address search problems, t-tests and chi-square tests found no difference between searches for texts and searches for graphic information, and between known-item searches and subject searches. Some of Web users' search tactics were similar to those for online searching or online catalog searches, but several tactics were unique to Web searching. 相似文献
12.
Expert searching in health librarianship: a literature review to identify international issues and Australian concerns 总被引：1，自引：1，他引：0
Lasserre K 《Health information and libraries journal》2012,29(1):3-15
Background: The traditional role of health librarians as expert searchers is under challenge. Objectives: The purpose of this review is to establish health librarians’ views, practices and educational processes on expert searching. Methods: The search strategy was developed in LISTA and then customised for ten other databases: ALISA, PubMed, Embase, Scopus, Web of Science, CINAHL, ERIC, PsycINFO, Cochrane Library and Google Scholar. The search terms were (expert search* OR expert retriev* OR mediated search* OR information retriev*) AND librar*. The searches, completed in December 2010 and repeated in May 2011, were limited to English language publications from 2000 to 2011 (unless seminal works). Results: Expert searching remains a key role for health librarians, especially for those supporting systematic reviews or employed as clinical librarians answering clinical questions. Conclusions: Although clients tend to be satisfied with searches carried out for them, improvements are required to effectively position the profession. Evidence‐based guidelines, adherence to transparent standards, review of entry‐level education requirements and a commitment to accredited, rigorous, ongoing professional development will ensure best practice. 相似文献
13.
The National Library of Medicine has had an enormous impact on health information services all over the world. Although NLM is primarily a national institution, it has become an important international resource by responding to requests from the international community. NLM has been influential in three major ways. First, NLM has provided a model for other national and regional health information services. Second, it has been a catalyst, in that MEDLARS and other services it provides formed the nucleus of many regional networks. NLM helped such networks get started by giving advice on how to set up services and build collections and by "training the trainers" on the MEDLARS system. Third, NLM has supported national and regional operations by providing the additional training and materials needed for day-to-day service. 相似文献
14.
The National Library of Medicine has had an enormous impact on health information services all over the world. Although NLM is primarily a national institution, it has become an important international resource by responding to requests from the international community. NLM has been influential in three major ways. First, NLM has provided a model for other national and regional health information services. Second, it has been a catalyst, in that MEDLARS and other services it provides formed the nucleus of many regional networks. NLM helped such networks get started by giving advice on how to set up services and build collections and by "training the trainers" on the MEDLARS system. Third, NLM has supported national and regional operations by providing the additional training and materials needed for day-to-day service. 相似文献
15.
16.
《The Journal of Academic Librarianship》2020,46(5):102202
A better understanding of users' search interactions in library search systems is key to improving the result ranking. By focusing on known-item searches (searches for an item already known) and search tactics, vast improvement can be made. To better understand user behaviour, we conducted four transaction-log studies, comprising more than 4.2 million search sessions from two German library search systems. Results show that most sessions are rather short; users tend to issue short queries and usually do not go beyond the first search engine result page (SERP). The most frequently used search tactic was the extension of a query (‘Exhaust’). Looking at the known-item searches, it becomes clear that this query type is of great importance. Between 38%–57% of all queries are known-item queries. Titles or title parts were the most frequent elements of these queries, either alone or in combination with the author's name. Unsuccessful known-item searches were often caused by items not available in the system. Results can be applied by libraries and library system vendors to improve their systems, as well as when designing new systems. Future research, in addition to log data, should also include background information on the usage, for example, through user surveys. 相似文献
17.
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
18.
East H 《The Journal of documentation; devoted to the recording, organization and dissemination of specialized knowledge》1978,34(4):311-323
This paper reviews a selection of international collaborative efforts in the production of information services and attempts to characterize modes of cooperation. Information systems specifically discussed include: international nuclear information system (INIS); Nuclear Science Abstract (NSA); EURATOM; AGRIS; AGRINDEX; Information Retrieval Limited (IRL); IFIS (International Food Information Service); Chemical Abstracts Service (CAS); MEDLARS; and TITUS. 3 methods of international information transfer are discussed: commercial transactions; negotiated (bilateral) barter arrangements; and contribution to internationally managed systems. Technical, economic, and professional objectives support the rationale for international cooperation. It is argued that economic and political considerations, as much as improved technology or information transfer, will determine the nature of collaboration in the future. 相似文献
19.
Brendan R. Watson 《Mass Communication and Society》2017,20(2):241-259
This study examines local web search data as a window into residents’ information needs surrounding the issue of urban crime. Media system dependency theory is used to explain the dynamic, interdependent relationships between changes in the local crime rate (i.e., the social system), news coverage of crime (i.e., the media system), and residents’ (i.e., the audience’s) online searches for crime-related information. It was hypothesized that crime rates and news coverage of crime would increase residents’ information needs, motivating residents to go online to search for crime-related information to cope with an increased sense of uncertainty. The responsiveness of local newspapers to residents’ dynamic information needs was also evaluated. In an initial study in Minneapolis, Minnesota, violent crime and newspaper coverage of crime did predict online searches for crime-related information. But news coverage did not predict searches for crime-related information in a follow-up study in St. Louis, Missouri. Coverage in neither city’s newspapers was responsive to changes in aggregate crime-related online searches. Reasons for differences between the two cities are discussed, as are theoretical implications for future efforts to assess what local residents’ information needs are and to evaluate whether they are being met. 相似文献
20.
Lucy Holman 《The Journal of Academic Librarianship》2011,37(1):19-27
Today's students exhibit generational differences in the way they search for information. Observations of first-year students revealed a proclivity for simple keyword or phrases searches with frequent misspellings and incorrect logic. Although no students had strong mental models of search mechanisms, those with stronger models did construct more complex searches. 相似文献