共查询到20条相似文献，搜索用时 31 毫秒
1.
李志明 《大学图书情报学刊》2014,(2):36-39
在当今信息爆炸的时代,文献信息搜索系统是读者方便、快捷利用文献信息的好助手。文章对读秀学术搜索系统与文津搜索系统从首页、收录文献类型、分类、单条件检索、高级检索、聚类方式及记录细览区等几个方面做了分析比较,在此基础上提出了需要改进的地方及给图书馆的启示。 相似文献
2.
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
3.
《The Journal of Academic Librarianship》2020,46(5):102190
Comprehensive yet efficient search methods are essential for any systematic or scoping review. This article outlines the stages of development of a systematic search methodology for a scoping review within the library and information science (LIS) literature. The effectiveness of the database search strategies (LISTA, LISA, ERIC, Scopus, Web of Science) and supplemental search techniques are measured through a retrospective analysis of performance metrics. Findings show that for research topics limited to the library setting, it may be more effective to search fewer databases (LISTA and Scopus only) for peer reviewed journal articles and allot more time to alternate search techniques such as web searching to identify non-journal literature. The article provides an evidence-based, methodological approach to developing a systematic search plan, unique to LIS researchers, that accounts for time and resource needs. 相似文献
4.
Users are often faced with complex information needs that are not easily represented as a single query. With current technology,
the burden of issuing these individual queries, analysing retrieved documents for relevance, as well as aggregating results
falls upon the time-poor and informationally overloaded user. Aggregated search techniques represent the new generation of
search applications that endeavour to help users perform these complex tasks. However, the way in which different data types
are combined in current aggregated search applications is often performed using static hard-coded structures. We suggest that
a useful alternative is to marry techniques from natural language generation, such as text planning and summarisation, in
order to dynamically determine the best organisation of retrieved information. These organisations can be motivated by linguistic
theories that consider issues such as the role that the information plays to facilitate a task, and the relationships between
different pieces of information. With reference to a discourse strategy, it is possible to draw on several data sources automatically
to generate a useful, focused, and coherent answer. We focus on exploring the parallels between aggregated search and natural
language generation in the hope that the fields can be mutually informed, leading to further advances in the way search technologies
can better serve the user. These issues are discussed and presented with examples of existing systems across different domains. 相似文献
5.
Matt Vassar Branden Carr Melissa Kash-Holley Elizabeth DeWitt Chelsea Koller Joshua Day Kimberly Day David Herrmann Matt Holzmann 《Journal of the Medical Library Association》2015,103(4):189-192
Objective
The choice of bibliographic database during the systematic review search process has been an ongoing conversation among information specialists. With newer information sources, such as Google Scholar and clinical trials registries, we were interested in which databases were utilized by information specialists and systematic review researchers.Method
We retrieved 144 systematic reviews and meta-analyses from 4 clinical endocrinology journals and extracted all information sources used during the search processes.Results
Findings indicate that traditional bibliographic databases are most often used, followed by regional databases, clinical trials registries, and gray literature databases.Conclusions
This study informs information specialists about additional resources that may be considered during the search process. 相似文献6.
《Journal of Web Librarianship》2013,7(4):267-285
This article summarizes the author's dissertation regarding search strategies of millennial undergraduate students in Web and library online information retrieval systems. Millennials bring a unique set of search characteristics and strategies to their research since they have never known a world without the Web. Through the use of search engines, they have come to expect that searches can be completed using an easy, single search box that produces complete articles on just about any topic. However, the reliability and quality of much of the information on the Web is questionable. Conversely, information that resides in library information retrieval systems is often of high scholarly content, but there is not a single, user-friendly system for millennials to use. A case study investigation was conducted at the State University of New York at Oswego, a public undergraduate university in Central New York. The goal of the study was to identify the search strategies of a sampling of millennial undergraduate students in both Web information retrieval systems and library information retrieval systems in order to expand upon existing theories about millennials and to suggest interface design enhancements, which could make online library information retrieval systems easier for millennials to use. The findings recommend improving database search functionality, such as natural-language searching, spell-checking, and uniform full-text wording and placement. Results also suggested that increasing the availability of full-text articles would contribute to millennials’ use of library information retrieval systems. 相似文献
7.
Heather L. O&#x;Brien Rebecca Dickinson Nicole Askin 《Library & information science research》2017,39(3):244-254
Individual differences have long been of interest in information science as they bear on the design of information systems and services for specific populations. Yet little is known as to which individual differences make a difference to search outcomes, both across applications and for diverse user groups. A scoping study of information seeking and retrieval research from 2000 to 2015 was conducted. Over 2100 articles retrieved from eight scholarly databases were screened based on title, abstract, and full-text (using specified inclusion criteria), resulting in 223 papers for analysis. Data were extracted to provide an overview of the literature, including types of individual differences studied, publication volume over time, measures, samples, and study outcomes. Findings are inconclusiveness regarding how individual differences affect search outcomes, and raise issues around measurement and generalizability. This study represents an essential first step to developing a more systematic investigation of individual differences research and connecting individual research studies to anchor and guide future work. 相似文献
8.
开展基于社会化标签系统、搜索引擎和分类目录3种平台的信息搜寻实验,从相对查全率、相对查准率两个指标的角度比较分析社会化标签系统与其他网络信息搜寻系统的搜寻效率。研究发现,搜索引擎的相对查全率和相对查准率最高,社会化标签系统的搜寻效率也有一定的优势。分类目录比社会化标签的相对查准率低,两者的相对查全率接近。对于某些特定的信息需求,社会化标签系统的搜寻效率甚至超过了搜索引擎。 相似文献
9.
Alison C. Bethel Morwenna Rogers Rebecca Abbott 《Journal of the Medical Library Association》2021,109(1):97
Background:Systematic reviews are comprehensive, robust, inclusive, transparent, and reproducible when bringing together the evidence to answer a research question. Various guidelines provide recommendations on the expertise required to conduct a systematic review, where and how to search for literature, and what should be reported in the published review. However, the finer details of the search results are not typically reported to allow the search methods or search efficiency to be evaluated.Case Presentation:This case study presents a search summary table, containing the details of which databases were searched, which supplementary search methods were used, and where the included articles were found. It was developed and published alongside a recent systematic review. This simple format can be used in future systematic reviews to improve search results reporting.Conclusions:Publishing a search summary table in all systematic reviews would add to the growing evidence base about information retrieval, which would help in determining which databases to search for which type of review (in terms of either topic or scope), what supplementary search methods are most effective, what type of literature is being included, and where it is found. It would also provide evidence for future searching and search methods research. 相似文献
10.
11.
D Dannenberg 《Bulletin of the Medical Library Association》1972,60(1):111-114
A course plan is presented for introducing literature searching and critical skills to dental students. Topics include the "life cycle of information," reference sources available, search procedure, abstracting and indexing, and personal information systems. Teaching is structured around planned seminars and student projects. The course design is compatible with traditional dental curricula and is based on students' interest in dentistry rather than in information/library science. 相似文献
12.
Julie M. Glanville Steven Duffy Rachael McCool Danielle Varley 《Journal of the Medical Library Association》2014,102(3):177-183
Background:
Since 2005, International Committee of Medical Journal Editors (ICMJE) member journals have required that clinical trials be registered in publicly available trials registers before they are considered for publication.Objectives:
The research explores whether it is adequate, when searching to inform systematic reviews, to search for relevant clinical trials using only public trials registers and to identify the optimal search approaches in trials registers.Methods:
A search was conducted in ClinicalTrials.gov and the International Clinical Trials Registry Platform (ICTRP) for research studies that had been included in eight systematic reviews. Four search approaches (highly sensitive, sensitive, precise, and highly precise) were performed using the basic and advanced interfaces in both resources.Results:
On average, 84% of studies were not listed in either resource. The largest number of included studies was retrieved in ClinicalTrials.gov and ICTRP when a sensitive search approach was used in the basic interface. The use of the advanced interface maintained or improved sensitivity in 16 of 19 strategies for Clinicaltrials.gov and 8 of 18 for ICTRP. No single search approach was sensitive enough to identify all studies included in the 6 reviews.Conclusions:
Trials registers cannot yet be relied upon as the sole means to locate trials for systematic reviews. Trials registers lag behind the major bibliographic databases in terms of their search interfaces.Implications:
For systematic reviews, trials registers and major bibliographic databases should be searched. Trials registers should be searched using sensitive approaches, and both the registers consulted in this study should be searched.Clinical trials registers such as ClinicalTrials.gov and portals to trials registers such as the World Health Organization (WHO) International Clinical Trials Registry Platform (ICTRP) are increasingly used to identify ongoing or completed clinical trials. These resources offer important information on the methods and progress of trials likely to be of interest to a range of users, including researchers, clinicians, and patients. The extent to which these resources can be relied upon as a sole source of trials for inclusion in systematic reviews, including Cochrane systematic reviews (CSRs), is the subject of the research study reported here. This study also investigates the most efficient ways that librarians, information professionals, and other searchers can search these resources. Search efficiency was investigated by evaluating the overlap and unique yield of searches in the two resources and by testing four search approaches. The tested search approaches ranged from the very precise (single specific condition search term combined with a single specific intervention search term) to the very sensitive (at least two interventions terms). 相似文献13.
14.
Organizing information on a Website is vital to retrieve information from Websites and the Internet. This study investigates the establishing of navigation and search systems needed to organize information on academic Websites, and addresses key questions in relation to information access and to the use of these systems. This is achieved through the evaluation of two Websites (Dhofar in Oman and Monash in Australia) and their comparison with Google, using standard criteria identified in the literature. The outcomes will support designers of academic Websites and will support students in accessing and retrieving information. The main findings of this research is that Google and Monash University Websites have established search and navigation systems that support Website accessibility, which enhance site usability while Dhofar University Website uses navigation systems only because of content reasons. 相似文献
15.
文献推荐系统：提高信息检索效率之途 总被引：2，自引：0，他引：2
Traditional Information Retrieval (IR) systems have limitations in improving search performance in today’s information environment. The high recall and poor precision of traditional IR systems are only as good as with the accuracy of search query, which is, however, usually difficult for the user to construct. It is also time-consuming for the user to evaluate each search result. The recommendation techniques having been developed since the early 1990s help solve the problems that traditional IR systems have. This paper explains the basic process and major elements of document recommender systems, especially the two recommendation techniques of content-based filtering and collaborative filtering. Also discussed are the evaluation issue and the problems that current document recommender systems are facing, which need to be taken into account in future system designs. Traditional Information Retrieval (IR) systems have limitations in improving search performance in today’s information environment. The high recall and poor precision of traditional IR systems are only as good as with the accuracy of search query, which is, however, usually difficult for the user to construct. It is also time-consuming for the user to evaluate each search result. The recommendation techniques having been developed since the early 1990s help solve the problems that traditional IR systems have. This paper explains the basic process and major elements of document recommender systems, especially the two recommendation techniques of content-based filtering and collaborative filtering. Also discussed are the evaluation issue and the problems that current document recommender systems are facing, which need to be taken into account in future system designs. 相似文献
16.
Organizing information on a Website is vital to retrieve information from Websites and the Internet. This study investigates the establishing of navigation and search systems needed to organize information on academic Websites, and addresses key questions in relation to information access and to the use of these systems. This is achieved through the evaluation of two Websites (Dhofar in Oman and Monash in Australia) and their comparison with Google, using standard criteria identified in the literature. The outcomes will support designers of academic Websites and will support students in accessing and retrieving information. The main findings of this research is that Google and Monash University Websites have established search and navigation systems that support Website accessibility, which enhance site usability while Dhofar University Website uses navigation systems only because of content reasons. 相似文献
17.
Martha R Harris 《Journal of the Medical Library Association》2005,93(1):81-87
QUESTION/SETTING: Although the systematic review has become a research standard, little information addresses the actions of the librarian on a systematic review team. METHOD: This article is an observational case study that chronicles a librarian's required involvement, skills, and responsibilities in each stage of a real-life systematic review. MAIN RESULTS: Examining the review process reveals that the librarian's multiple roles as an expert searcher, organizer, and analyzer form an integral part of the Cochrane Collaboration's criteria for conducting systematic reviews. Moreover, the responsibilities of the expert searcher directly reflect the key skills and knowledge depicted in the "Definition of Expert Searching" section of the Medical Library Association's policy statement, "Role of Expert Searching in Health Sciences Libraries." CONCLUSION: Although the librarian's multiple roles are important in all forms of medical research, they are crucial in a systematic review. As an expert searcher, the librarian must interact with the investigators to develop the terms required for a comprehensive search strategy in multiple appropriate sources. As an organizer and analyzer, the librarian must effectively manage the articles and document the search, retrieval, and archival processes. 相似文献
18.
Objective:In regard to locating clinical trials for a systematic review, limited information is available about how librarians locate clinical trials in biomedical databases, including (1) how much information researchers provide librarians to assist with the development of a comprehensive search strategy, (2) which tools librarians turn to for information about study design methodology, and (3) librarians'' confidence levels in their knowledge of study design methodology. A survey was developed to explore these aspects of how a medical librarian locates clinical trials when facilitating systematic reviews for researchers.Methods:In this cross-sectional study, a 21-question survey was sent to medical librarians via several email listservs during April 2020. Respondents were limited to librarians who make the decisions on search terms for systematic reviews.Results:Responses (n=120) indicated that librarians were often asked to search for various types of clinical trials. However, there was not a consistent method for creating search strategies that locate diverse types of clinical trials. Multiple methods were used for search strategy development, with hedges being the most popular method. In general, these librarians considered themselves to be confident in locating trials. Different resources were used to inform study types, including textbooks, articles, library guides and websites.Discussion:Medical librarians indicated that while they felt confident in their searching skills, they did not have a definitive source of information about the various types of clinical trials, and their responses demonstrated a clear need and desire for more information on study design methodology. 相似文献
19.
BioSYNTHESIS is a prototype intelligent retrieval system under development as part of the IAIMS project at Georgetown University. The aim is to create an integrated system that can retrieve information located on disparate computer systems. The project work has been divided in two phases: BioSYNTHESIS I, development of a single menu to access various databases which reside on different computers; and BioSYNTHESIS II, development of a search component that facilitates complex searching for the user. BioSYNTHESIS II will accept a user's query and conduct a search for appropriate information in the IAIMS databases at Georgetown. For information not available at Georgetown, such as full text, it will access selected remote systems and translate the search query as appropriate for the target system. The search through various computer systems and different databases with unique storage and retrieval structures will be transparent to the user. BioSYNTHESIS I is complete and available to users. The design work for BioSYNTHESIS II is under development and will continue as a multiyear technical research effort of the proposed Georgetown IAIMS implementation project. 相似文献
20.
Melissa L. Rethlefsen Shona Kirtley Siw Waffenschmidt Ana Patricia Ayala David Moher Matthew J. Page Jonathan B. Koffel PRISMA-S Group 《Journal of the Medical Library Association》2021,109(2):174
Background:Literature searches underlie the foundations of systematic reviews and related review types. Yet, the literature searching component of systematic reviews and related review types is often poorly reported. Guidance for literature search reporting has been diverse and, in many cases, does not offer enough detail to authors who need more specific information about reporting search methods and information sources in a clear, reproducible way. This document presents the PRISMA-S (Preferred Reporting Items for Systematic reviews and Meta-Analyses literature search extension) checklist, and explanation and elaboration.Methods:The checklist was developed using a three-stage Delphi survey process, followed by a consensus conference and public review process.Results:The final checklist includes sixteen reporting items, each of which is detailed with exemplar reporting and rationale.Conclusions:The intent of PRISMA-S is to complement the PRISMA Statement and its extensions by providing a checklist that could be used by interdisciplinary authors, editors, and peer reviewers to verify that each component of a search is completely reported and, therefore, reproducible. 相似文献