关于网络信息获取工具搜索引擎的研究     

李力 《广东广播电视大学学报》2006,15(3):19-23

搜索引擎是有效获取学习资源的重要工具,全面认识和深入研究其特点和规律对改进现代远程教育的学习支持服务具有积极意义。本文研究了搜索引擎的技术现状和应用现状,总结分析了目前存在的瓶颈问题,指出搜索引擎发展中的三个重要创新点:以元搜索为例的搜索模式创新;以桌面搜索为代表的服务模式创新和以智能化为导向的技术性能提升。  相似文献   

第三代图书馆服务平台的元数据管理——以FOLIO的Codex方案为例     

许磊  夏翠娟 《中国图书馆学报》2020,46(1):99-113

在数据化的网络时代,用户需求与图书馆服务形式向深度专业的知识化和智慧化发展。面对这种新常态,第三代图书馆服务平台的元数据管理不仅需要解决图书馆集成管理系统甚或是"下一代"图书馆服务平台受困于MARC的现状,满足资源的统一管理与业务整合,更需要考虑统一的数据建模与编码方式,实现跨类型的数据流通和知识的组织与融合。这就为元数据管理提出了新的需求,包括:完整的生命周期管理,资源类型兼容,标准规范兼容,互联网环境下的书目与规范控制,知识组织与融合。这种运用平台化思维、改变图书馆运行生态的可能性可以在FOLIO项目中看到希望。FOLIO作为以微服务架构设计的图书馆服务平台,在设计之初就定义了一个核心的微服务域--Codex。一方面,Codex作为数据注册中心和数据链接中介位于FOLIO架构的顶层,通过Codex消除不同域中数据的编码、格式和存储位置的差异,以减少域之间的交互与耦合。另一方面,Codex以BIBFRAME 2模型为基础设计了"作品-实例-单件/馆藏"的抽象数据模型,并参考DC元素设计了一套最小核心元数据元素集。Codex记录不描述资源的详细信息,只起到揭示与定位的作用。专有的业务信息或更详细的记录信息都可以通过Codex链接到相应的记录层获取。Codex作为核心的元数据管理域,将被设计成为FOLIO平台的资源链接中心、规范数据中心、跨域的全媒体资源管理入口,并通过模型中的抽象实体揭示资源间的关系。虽然现阶段仅实现了不存储自身数据的Codex Search,对关联数据的支持也不够完善,但无论是其抽象的数据模型,还是最小化的元数据方案,以及"统一记录-业务记录-正式记录"的分层描述原则,Codex都有足够的灵活性支持面向实体对象的描述与组织。  相似文献   

Dialog联机检索与Internet网络检索的比较与应用   总被引：1，自引：0，他引：1  

王小卿 《情报科学》2003,21(9):990-991,997

Dialog联机检索与Internet网络检索技术巳为广大的查新检索人员所熟悉。本文旨在通过对Dialog联机检索与Internet网络检索系统功能的综合分析比较，探讨如何将两种检索技术手段有机地结合起来，更好地为科技查新服务。  相似文献   

信息查询与检索中的挫折研究综述     

黄崑  罗士超  李蕾  孙广芝 《图书情报工作》2023,67(5):142-151

[目的/意义]梳理信息查询与检索领域挫折相关的研究现状,为挫折应对提供参考和借鉴。[方法/过程]从挫折内涵、信息查询挫折、信息检索挫折以及相关影响因素等角度分析国内外研究进展,归纳挫折成因。[结果/结论 ]已有文献结合问卷、访谈、实验、日志挖掘等多种研究方法,揭示了挫折产生原因以及用户、任务、信息结果与环境等因素对信息查询与检索挫折的影响。基于这些发现,从挫折理论模型构建、用户挫折感测量、信息素养教育以及信息服务提供等角度提出进一步研究建议。  相似文献   

Updated generic search filters for finding studies of adverse drug effects in Ovid medline and Embase may retrieve up to 90% of relevant studies     

Su Golder PhD  Kelly Farrah MLIS  Monika Mierzwinski-Urban MLIS  Beth Barker BSc  Anna Rama 《Health information and libraries journal》2023,40(2):190-200

Background

The most current objectively derived search filters for adverse drug effects are 15 years old and other strategies have not been developed and tested empirically.

Objective

To develop and validate search filters to retrieve evidence on adverse drug effects from Ovid medline and Ovid Embase.

Methods

We identified systematic reviews of adverse drug effects in Epistemonikos. From these reviews, we collated their included studies which we then randomly divided into three tests and one validation set of records. We constructed a search strategy to maximise relative recall using word frequency analysis with test set one. This search strategy was then refined using test sets two and three and validated on the final set of records.

Results

Of 107 systematic reviews which met our inclusion criteria, 1948 unique included studies were available from medline and 1980 from Embase. Generic adverse drug effects searches in medline and Embase achieved 90% and 89% relative recall, respectively. When specific adverse effects terms were added recall was improved.

Conclusion

We have derived and validated search filters that retrieve around 90% of records with adverse drug effects data in medline and Embase. The addition of specific adverse effects terms is required to achieve higher recall.  相似文献   

Integrating diversity,equity, and inclusion principles into instruction: Case studies from the University of Florida's Health Science Center Libraries     

Jane Morgan-Daniel MLIS  AHIP  Hannah F. Norton MS  AHIP  Mary Edwards MLIS  EdD  Lauren Adkins MLIS  AHIP 《Health information and libraries journal》2023,40(3):332-338

Librarians at the University of Florida Health Science Center Libraries have begun to intentionally incorporate diversity, equity, and inclusion (DEI) principles into teaching during design, implementation, and evaluation. This article uses four case studies to provide an overview of the librarians' approaches to inclusive teaching (1) an annual workshop for Physical Therapy students on the intersection between DEI, health literacy, and patient education; (2) a librarian-taught one-credit course for public health students, which was revised to create a more inviting syllabus and integrate elements of universal design; (3) an annual project for first year medical students highlighting health disparities and community resources; and (4) piloting the application of critical librarianship principles in library standalone sessions on database searching and reference management. Suggestions are provided for other librarians who are interested in developing a culture of inclusive teaching in their own libraries.  相似文献   

浅议研究生文献检索能力的培养   总被引：3，自引：0，他引：3  

姚忠平  孙丽  宋英  姜兆华 《哈尔滨学院学报》2011,32(1):139-141

信息素养教育是培养研究生终身学习能力的重要途径,是造就创新型研究生的重要手段。作者主要分析总结了在研究生期间加强研究生文献检索能力的一些具体做法和经验。通过引导研究生选修文献检索课,熟悉学校图书馆资源和其他网络资源的使用,并在研究生教学中引入文献检索要素,以及利用课题组会制度强化文献检索实践,进而不断培养和提高研究的文献检索能力。  相似文献   

Systematic searching for theory to inform systematic reviews: is it feasible? Is it desirable?          下载免费PDF全文

Andrew Booth  Christopher Carroll 《Health information and libraries journal》2015,32(3):220-235

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Identification of biomedical journals in Spain and Latin America     

Xavier Bonfill  Dimelza Osorio  Margarita Posso  Ivan Sol  Gabriel Rada  Ania Torres  Marcelo García Dieguez  Maricela Pia‐Pozas  Luisa Díaz‐García  Mario Tristn  Omar Gandarilla  David A. Rincn‐Valenzuela  Arturo Martí  Ricardo Hidalgo  Daniel Simancas‐Racines  Luis Lpez  Ricardo Correa  Antonieta Rojas‐De‐Arias  Csar Loza   scar Gianneo  Hector Pardo   《Health information and libraries journal》2015,32(4):276-286

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Copyright and IPR management for cultural heritage digital content in peer-to-peer networks     

Dimitrios Tsolis  Spyros Sioutas  Michalis Nik Xenos  Georgios Styliaras 《Journal of Cultural Heritage》2011,12(4):466

As a general and effective protection measure for copyright violations, which occur with the use of digital technologies including peer-to-peer (P2P) networks, copyright owners from the cultural sector often use Digital Rights Management (DRM) systems and digital watermarking techniques so as to encrypt copyright information to the cultural content. In other cases, copyright owners restrict or even block access to the digital cultural content through the Internet and the P2P infrastructure. This chapter claims that DRM and P2P can be quite complementary. Specifically, a P2P infrastructure is presented which allows broad digital cultural content exchange while on the same time supports copyright protection and management through watermarking technologies for digital images.  相似文献