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1.
曾湛伟 《现代图书情报技术》2010,26(6):78-82
针对当前自建特色数据库检索系统存在的检索效率低、检索途径单一等问题,提出基于开源全文检索引擎Sphinx对特色数据库进行全文检索的方法,详细介绍系统实现的关键技术。通过对比测试,该系统能够提高检索速度和检索质量,满足用户的检索需求。 相似文献
2.
《Library & information science research》1996,18(2):133-149
The study examined and assessed the search techniques of trained end-users and determined whether or not they were searching the system effectively. One hundred and thirty-one users searched a full-text system and completed a survey that asked them to evaluate the system and describe their search strategy and techniques. Overall, 55% of the total indicated dissatisfaction with their searches. Correlations between native language and searching results and satisfaction are shown. These findings suggest that computer literate end-users with prior experience searching other databases and formal training experience more difficulties than is commonly realized. Implications for training are discussed. 相似文献
3.
A survey to determine attitudes toward end-user searching was made at Loyola University's Medical Center Library using MEDIS, an online full-text and bibliographic medical retrieval system. One hundred forty-one completed questionnaires were analyzed for this report. Information was collected on user familiarity with computers, end-user training, system use, mechanics of searching, and attitudes toward future use. Computer familiarity was highest among the faculty users. Ninety percent of the respondents saw librarians as a crucial agent in training and in providing end-user assistance. Respondents identified five major reasons for using the system: helpfulness, convenience, time savings, rapid feedback, and presentation of needed information. Searching the MEDLINE database rather than the full-text database was the search method of choice. Continued use of both mediated and end-user searching was intended by most of the respondents. Survey results support a perceived need for end-user searching and confirmed recommendations of the Association of American Medical Colleges on medical information science skills. 相似文献
4.
本文对JALIS特色资源的整合进行了调查,调查显示全省各馆建设的特色数据库特色鲜明、建设规范,但新增资源少,服务面窄,特色数据库的作用有待进一步发挥,各馆一致认为有必要对特色数据库统一整合。特色资源整合平台可以首先对每个特色数据库进行元数据的收割,同时应尽可能收割或采集全文资源,对采集不到的资源应提供多种链接方式或文献传递来保证全文资源的获取,并提供统一检索、学科导航、特色库还原、资源评论、RSS订阅等功能来提高特色资源的服务效果。 相似文献
5.
Jeffrey Beall 《Library Collections, Acquisitions, and Technical Services》2010,34(2-3):74-82
Geographical research often involves searching for place names in full-text resources, such as digitized books. Place names often have variants, resulting in many different names for a single geographical place, a problem that can lead to missed results in full-text searches for place names. The problem occurs because full-text search engines merely match words in the search box with words in online documents, leaving place–name variants unsearched. This paper describes how relevant resources can be missed due to this problem and describes the different sources of place–name variation. Finally, the paper describes some solutions to the place–name variation problem in full-text searching. 相似文献
6.
基于Web的数字图书馆跨库检索系统的比较研究 总被引：5，自引：0，他引：5
以Searchlight、NLM Gateway等6个国内外数字图书馆跨库检索系统为对象,从检索性能、检索结果处理、检索效率、资源整合、用户服务、使用管理6项功能指标对其进行比较分析,得出现有跨库检索系统大多还处于实践和试用阶段,距离完善的跨库检索系统还有一定距离以及由于用户习惯等众多因素的限制,跨库检索系统并不是对单个检索系统的取代,而是其有益有补充的结论。 相似文献
7.
从检索角度谈外文医学期刊全文数据库的文献保障率 总被引：4，自引：0，他引：4
本文通过检索调查外文期刊全文数据库的文献保障率；找出外文期刊全文数据库的特点及存在的问题，为图书馆外文期刊全文数据库制定选购决策提供一种模式。 相似文献
8.
Hersh WR Crabtree MK Hickam DH Sacherek L Rose L Friedman CP 《Bulletin of the Medical Library Association》2000,88(4):323-331
OBJECTIVES: Despite the growing use of online databases by clinicians, there has been very little research documenting how effectively they are used. This study assessed the ability of medical and nurse-practitioner students to answer clinical questions using an information retrieval system. It also attempted to identify the demographic, experience, cognitive, personality, search mechanics, and user-satisfaction factors associated with successful use of a retrieval system. METHODS: Twenty-nine students completed questionnaires of clinical and computer experience as well as tests of cognitive abilities and personality type. They were then administered three clinical questions to answer in a medical library setting using the MEDLINE database and electronic and print full-text resources. RESULTS: Medical students were able to answer more questions correctly than nurse-practitioner students before and after searching, but both had comparable improvements in the number of correct questions before and after searching. Successful ability to answer questions was also associated with having experience in literature searching and higher standardized test-score percentiles. CONCLUSIONS: Medical and nurse-practitioner students obtained comparable benefits in the ability to answer clinical questions from use of the information retrieval system. Future research must examine strategies that improve successful search and retrieval of clinical questions posed by clinicians in practice. 相似文献
9.
探论当前流行的web数据库的构造技术,着重阐述浙江大学学位论文全文网络数据库系统后台数据库的建设、用户管理、安全及数据完整性管理和论文的全文检索,并给出数据库查询及结果显示界面。 相似文献
10.
鑫磐全息数据库和现代图书馆文献信息服务 总被引：1，自引：0，他引：1
为了在 Internet和 Intranet上提供数据库网络查询服务,图书馆需要将现有的数据库进行加工（如转换成全文数据库）。鑫磐公司的鑫磐全息数据库GSADB,为文献情报机构提供网络数据库查询服务提供全面解决方案。本文论述了GSADB的数据库定义、索引、因特网互连等关键技术和应用。 相似文献
11.
以4个全文外文期刊数据库Elsevier、Springer、EBSCOhost和JohnWiley为例,运用丰富度指数（S）、Shannon多样性指数（H）和Pielou均匀度指数（J）等评估和比较几个数据库的信息量。分析表明,EBSCOhost中ASP的刊种丰富度（S）和主题丰富度（S1）在几个数据库中最高,而H和J值最低;在信息指数与用户使用率之间的关系中,分析表明Elsevier数据库的H和J值最高,其用户访问量和全文下载量最多,性价比最高。研究结果可为图书馆了解数据库提供新视角。 相似文献
12.
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
13.
高凌云 《大学图书情报学刊》2010,28(2):75-77
近年来,我国标准文献全文数据库发展速度很快,质最也在不断提高,但在实际使用中还存在一些问题,认识并解决现存的问题对于我国标准文献全文数据库的健康发展非常重要。在数据库的收录内容方面要保证内容准确、收录范围适当、提供详细的著录信息及相应的释义、条文说明;在数据库的检索功能方而要提供全面的可检字段和先进的检索技术;在数据库的用户服务方面要方便用户获取自己所需的信息,要为用户提供个性化信息服务,要提高用户与系统之间以及用户之间的交互性。 相似文献
14.
Martha E. Williams 《Publishing Research Quarterly》1995,11(3):3-9
The database industry was initiated in the early 1970s by the abstracting and indexing (A&I) or secondary publishers as they
converted their print products to computer-readable form. In the 1980s a number of primary publishers followed suit and introduced
the first full-text databases—first on magnetic tapes and then on CD-ROMs. CD-ROM was responsible for accelerating the growth
of full-text databases. The majority of the early databases were produced by government and not-for-profit organizations.
In the mid-1980s the commercial sector started large-scale production of databases and now produces the majority of all publicly
available databases. This paper traces the growth of the computer-readable database industry from the 1970s to the present. 相似文献
15.
16.
Jessica Bates Paul Best Janice McQuilkin Brian Taylor 《The Journal of Academic Librarianship》2017,43(1):8-17
The availability of web search engines offers opportunities in addition to those provided by bibliographic databases for identifying academic literature, but their usefulness for retrieving research is uncertain. A rigorous literature search was undertaken to investigate whether web search engines might replace bibliographic databases, using empirical research in health and social care as a case study. Eight databases and five web search engines were searched between 20 July and 6 August 2015. Sixteen unique studies which compared at least one database with at least one web search engine were examined, as well as drawing lessons from the authors’ own search process. Web search engines were limited in that the searcher cannot be certain that the principles of Boolean logic apply and they were more limited than bibliographic databases in their functions, such as exporting abstracts. Recommendations are made for improving the rigour and quality of reporting studies of academic literature searching. 相似文献
17.
研究生利用数据库资源的满意度及影响因素实证研究 总被引：1，自引：0，他引：1
本研究参考技术接受模型提出研究模型及假设,主要对五所高校的研究生进行抽样调查,通过实证分析探讨用户利用数据库资源的满意度及内部影响因素和外部影响因素。数据分析结果表明,研究生在利用数据库资源进行信息查寻时,利用数据库的满意度受到数据库服务质量、系统使用便利性和用户感知数据库有用的正向影响;而感知数据库有用会受到信息对需求的适应性、用户自我效能和感知数据库易用的正向影响,感知数据库易用会受到系统使用便利性和用户自我效能的正向影响;用户利用数据库查寻信息的意向则会同时受到用户感知数据库有用和用户利用数据库满意度的影响。本研究还发现,用户的性别差异会带来用户感知数据库易用、满意度和查寻意向的显著差异,用户使用数据库频率的差异会对感知数据库易用带来显著区别,年级差异会导致感知数据库有用的差异。 相似文献
18.
全文数据库的技术进展和应用 总被引：2，自引：0，他引：2
邵品洪 《现代图书情报技术》1993,9(4):6-10
本文首先概述了全文数据库的应用情况和制作方式 ;接着对文本匹配算法和文本匹配硬件两方面 ,分别介绍了全文检索技术和进展 ;最后指出同超文本技术结合和多媒体处理是今后的研究课题。 相似文献
19.
The MELVYL MEDLINE project resulted in the addition of a full five-year subset of MEDLINE to the University of California's (UC) MELVYL online union catalog. As one of the nation's largest MEDLINE end-user searching systems, MELVYL MEDLINE provides online bibliographic access to the biomedical journal literature for all UC personnel at over seventy library sites or by remote access. This paper summarizes the project's accomplishments, reports MELVYL MEDLINE use and its impact on library services, and provides insights for other end-user search systems. The project serves as a model for adding databases to the MELVYL catalog and demonstrates the potential for use by other disciplines of a specialized database when readily accessible. Evaluation results report high user satisfaction and high usage. However, many advanced searching features of the interface are little used by searchers. Effects on library services include marked increases in reference transactions and interlibrary loans, with significant declines in mediated search services. Future MELVYL MEDLINE enhancements include matching search retrievals to journal locations, linkage to an online document delivery system, and consideration of building a superset of databases by combining MELVYL MEDLINE with citations from another database in the MELVYL catalog. 相似文献
20.
《The Reference Librarian》2013,54(27-28):269-280
Use of full-text databases in electronic and optically published format is being pursued vigorously by major publishers. Reference librarians are using databases published in these alterative formats to print for dissemination of information products by publishers. Introduction of distribution technology for databases in these formats should be easier for reference librarians to introduce to end-users than has been the case with formats other than print for full-text searching of newspaper and periodicals. Bibliographic instruction in the use of databases embedded in these formats have interactive features allowing the publisher to use interactive tutorials to assist the librarian in introducing them to novices in the use of such technology in libraries. This should facilitate their acceptance in reference areas of libraries. Several such systems are described. An examination of the standards governing this technology is discussed. 相似文献