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1.
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
2.
应用改进的共词聚类法探索医学信息学热点主题演变 总被引：4，自引：0，他引：4
对传统的共词聚类方法进行完善:依据高频低频词界分公式选取高频词;计算粘合力确定每个类别的中心词;对比分析两个时间段,发现主题演变。以医学信息学为例,从PubMed数据库分别下载1999年-2003年和2004年-2008年该学科相关文献,提取主要主题词,进行共词聚类分析,探索医学信息学学科结构的演变过程。 相似文献
3.
W Moll 《Bulletin of the Medical Library Association》1971,59(3):458-462
The paper reviews the highlights of a four-week trial period (November 19-December 18, 1970) during which the Medical Library of the University of Virginia experimented with a new remote-access bibliographical control and retrieval system via its TWX machine. The system, called AIM-TWX, was sponsored by the Lister Hill National Center for Biomedical Communications and utilizes a timeshared IBM 360/67 computer in Santa Monica, California. Citations from 109 clinically-oriented journals from 1966 to date, including those currently included in the Abridged Index Medicus, may be retrieved either on- or off-line.Various aspects of this service are described, including problems of staffing, training, and record keeping, as well as the role of the MeSH vocabulary which is the principle "language" of the man-computer dialog.The statistical results indicated that the system was used for approximately 200 minutes on nineteen days and that an average of sixteen searches were run on any given day, or about 4.6 searches per hour of use. In spite of an inexperienced staff who had little knowledge of the MeSH vocabulary and whose training schedule was limited to one four-hour session, the experiment was highly successful in terms of searches and citations.At the end of the period, 298 searches had been run for 114 requestors, and 5,343 citations had been produced. Only fifty-five searches yielded no citations. The experiment generated a great deal of excitement and interest among the staff of the Library and of the Medical Center. Moreover, a large number of medical practitioners in large and small communities of Virginia participated in this experiment, indicating that there exists a great demand for this type of literature searching which AIM-TWX is able to provide with great rapidity. 相似文献
4.
急性白血病相关基因的文本挖掘分析 总被引：2，自引：0，他引：2
从PubMed检索1966年到2005年9月6日间白血病与基因关系的相关文献3 529篇.经编程处理生成主题词词篇矩阵并进行聚类.通过聚类树图可将所提取的主题词/副主题词分成13类,经对比原始文献进行验证,全部29种基因中只与ALL相关的有3种, 占10.34%;只与AML相关的有8种,占27.59%.特异的可用于鉴别ALL和AML的基因有11种,占37.93%.通过主题词的共现关系进行聚类可以基本实现发现基因与疾病之间的联系,但该方法所获得的相关基因较少,不利于对疾病与基因关系的全面了解. 相似文献
5.
近十年国外对中草药研究的关注点——基于高频主题词的共现聚类分析 总被引：1，自引：0，他引：1
目的:调查国外作者发表的中草药研究文献, 分析国外作者对中草药研究的关注点.方法:对PubMed数据库中近10年由国外作者发表的有关中草药的文献进行主题词共现聚类分析, 下载这些文献的主题词并统计主题词出现的频次,截取高频主题词,形成主题词共现矩阵,对矩阵做聚类.通过分析各类的文献内容,得到该主题的研究热点.结果:共检出国外作者发表的论文2 609篇,出现频次超过20次的主题词为43个,聚类得到5个研究热点.结论:①中药抗炎免疫药理、植物型抗肿瘤药物药理、中药抗氧化作用药理以及中药制剂作为神经保护药的药理学研究、黄酮类化合物和生物碱类的药理学研究是中草药药理学研究的关注点;②糖尿病、哮喘等疾病是国外进行中草药治疗应用研究的热点病种;③含马兜铃酸中药的肾脏毒性研究和中草药引起中毒性肝炎的研究是中草药副作用研究的热点;④植物型抗肿瘤药物用于治疗前列腺癌的研究曾受到国外研究人员极大关注;⑤人参属等药用植物的化学成分和人参皂苷药理活性研究受到关注. 相似文献
6.
D Bishop 《Bulletin of the Medical Library Association》1969,57(3):275-280
The study of veterinary medicine is becoming increasingly important in the progress of human medicine, and as a consequence the literature of veterinary medicine is assuming increased importance in the libraries of schools of human medicine. In the past decade programs in comparative medicine have been initiated in many centers, reestablishing the linkage between veterinary and human medicine.Since 1966 the National Library of Medicine has assumed extra responsibilities in the collection and control of veterinary medical literature. increased indexing has thus far been the major result, with a resultant increase in the need to consult veterinary journals. Advances in the veterinary curriculum and continued veterinary education have also increased demand for veterinary publications. Such demand must be foreseen and met by medical school libraries if they are to fulfill their obligations to the scholarly medical community. 相似文献
7.
Medical Subject Headings and medical terminology: an analysis of terminology used in hospital charts
Terminology used by health professionals in everyday written discourse was compared with terminology in a standardized medical vocabulary, the Medical Subject Headings (MeSH). Fifty written hospital charts were selected at random and analyzed by a computer program that identified MeSH terms in the charts. The charts were analyzed against two related MeSH vocabularies--one containing MeSH terms and one containing both MeSH terms and backwards cross-reference terms. When small words such as articles and prepositions were disregarded, approximately 50% of the words in a medical chart were found to be MeSH-related terminology. In addition, about 40% of MeSH-related words in the charts were either MeSH terms or backwards cross-reference terms. 相似文献
8.
本研究对MEDLINE中生物体类文献中高频主要主题词进行共词聚类分析,获取主题词之间的关联规则,利用UMLS语义关系进行结构化表达.从MEDLINE中选取<中华医学杂志>上的生物体类文献作为测试集,由专家人工抽取关系,与共词聚类得到的关联规则进行比较.利用共词聚类分析对生物体类主题词关系的挖掘及评价分析,为文本知识发现提供了一种新的尝试. 相似文献
9.
Douyère M Soualmia LF Névéol A Rogozan A Dahamna B Leroy JP Thirion B Darmoni SJ 《Health information and libraries journal》2004,21(4):253-261
The amount of health information available on the Internet is considerable. In this context, several health gateways have been developed. Among them, CISMeF (Catalogue and Index of Health Resources in French) was designed to catalogue and index health resources in French. The goal of this article is to describe the various enhancements to the MeSH thesaurus developed by the CISMeF team to adapt this terminology to the broader field of health Internet resources instead of scientific articles for the medline bibliographic database. CISMeF uses two standard tools for organizing information: the MeSH thesaurus and several metadata element sets, in particular the Dublin Core metadata format. The heterogeneity of Internet health resources led the CISMeF team to enhance the MeSH thesaurus with the introduction of two new concepts, respectively, resource types and metaterms. CISMeF resource types are a generalization of the publication types of medline. A resource type describes the nature of the resource and MeSH keyword/qualifier pairs describe the subject of the resource. A metaterm is generally a medical specialty or a biological science, which has semantic links with one or more MeSH keywords, qualifiers and resource types. The CISMeF terminology is exploited for several tasks: resource indexing performed manually, resource categorization performed automatically, visualization and navigation through the concept hierarchies and information retrieval using the Doc'CISMeF search engine. The CISMeF health gateway uses several MeSH thesaurus enhancements to optimize information retrieval, hierarchy navigation and automatic indexing. 相似文献
10.
M E Funk 《Bulletin of the Medical Library Association》1978,66(2):223-227
Hospital physicians naturally require current medical information in order to treat their patients. An objectively obtained SDILINE storesearch was devised to obtain this information. A rank-ordered list of hospital discharge diagnoses, coded with ICDA terms, was translated into MeSH. The top two Bradford zones of journals defined as useful at the University of Missouri--Kansas City were ANDed to these MeSH terms. Citations retrieved from the storesearch are input into an in-house computerized data base. The method can be easily used by other medical or hospital libraries without access to computers. 相似文献
11.
Jos Antonio Salvador-Olivn Gonzalo Marco-Cuenca Rosario Arquero-Avils 《Journal of the Medical Library Association》2021,109(4):561
Objective:Locating systematic reviews is essential for clinicians and researchers when creating or updating reviews and for decision-making in health care. This study aimed to develop a search filter for retrieving systematic reviews that improves upon the performance of the PubMed systematic review search filter.Methods:Search terms were identified from abstracts of reviews published in Cochrane Database of Systematic Reviews and the titles of articles indexed as systematic reviews in PubMed. Both the precision of the candidate terms and the number of systematic reviews retrieved from PubMed were evaluated after excluding the subset of articles retrieved by the PubMed systematic review filter. Terms that achieved a precision greater than 70% and relevant publication types indexed with MeSH terms were included in the filter search strategy.Results:The search strategy used in our filter added specific terms not included in PubMed''s systematic review filter and achieved a 61.3% increase in the number of retrieved articles that are potential systematic reviews. Moreover, it achieved an average precision that is likely greater than 80%.Conclusions:The developed search filter will enable users to identify more systematic reviews from PubMed than the PubMed systematic review filter with high precision. 相似文献
12.
我国图书馆员教育与培训研究现状统计分析 总被引：2，自引：0，他引：2
论文以1996年到2008年维普数据库收录的关于我国图书馆员教育和培训研究的1032篇文献为研究对象,运用文献计量学方法,从年度文献量、期刊分布、著者、主题等方面进行统计分析,揭示了近十三年来国内关于图书馆员教育和培训领域的研究状况,以期为国内在这一领域的研究提供一些参考。参考文献5。 相似文献
13.
《International Information and Library Review》1998,30(3):169-184
I surveyed the social sciences journal literature for the decade period 1987-1996 looking for papers with authors, or at least one co-author giving an address from an institution in Turkey. The number of such papers had nearly tripled from 1987 to 1996. I found that the papers are scattered into 341 journals and almost one third of all papers went to nine journals, each of which contained an average of a least one Turkish paper per year. Only two of these journals, on archaeology and anthropology, happened to be of high citation impact.Psychology and psychiatry, combined with business and economics are found to be the most productive subjects accounting for about half of the publication output. A vast majority of the papers were articles in English, and in an average article contained about 24 bibliographic references. The number of Turkish papers in nine major journals are somewhat correlated with their availability in local libraries. The number of co-authors per paper had nearly doubled over the period surveyed, reflecting increased interaction among scientists. About half of the authors were affiliated with three universities in Ankara and Istanbul, indicating a heavier concentration of social sciences research in the main metropoles of the country. 相似文献
14.
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
15.
16.
Wayne State University Medical Library (WSUML) revised its monograph subject catalog in 1961 utilizing the 1960 edition of MeSH as an authority list. With the introduction of MEDLARS in 1963 by NLM, all topical subheadings were omitted from MeSH. Inasmuch as this omission could not accommodate the needs of WSUML, the 1960 edition of MeSH was retained as a guideline.In January 1966, when MeSH resumed the incorporation of topical subheadings, WSUML was faced with a decision whether to continue the current policy or to adopt the form as presented in the latest edition of MeSH. This report describes the methodology employed in adopting a new policy, the findings which resulted from the change, and an evaluation of this reorganization. 相似文献
17.
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
18.
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
19.
Background: The researchers involved in this study work at Exeter Health library and at the Complementary Medicine Unit, Peninsula School of Medicine and Dentistry (PCMD). Within this collaborative environment it is possible to access the electronic resources of three institutions. This includes access to amed and other databases using different interfaces. Objectives: The aim of this study was to investigate whether searching different interfaces to the amed allied health and complementary medicine database produced the same results when using identical search terms. Methods: The following Internet‐based amed interfaces were searched: DIALOG DataStar; EBSCOhost and OVID SP_UI01.00.02. Search results from all three databases were saved in an endnote database to facilitate analysis. A checklist was also compiled comparing interface features. Results: In our initial search, DIALOG returned 29 hits, OVID 14 and Ebsco 8. If we assume that DIALOG returned 100% of potential hits, OVID initially returned only 48% of hits and EBSCOhost only 28%. In our search, a researcher using the Ebsco interface to carry out a simple search on amed would miss over 70% of possible search hits. Subsequent EBSCOhost searches on different subjects failed to find between 21 and 86% of the hits retrieved using the same keywords via DIALOG DataStar. In two cases, the simple EBSCOhost search failed to find any of the results found via DIALOG DataStar. Conclusions: Depending on the interface, the number of hits retrieved from the same database with the same simple search can vary dramatically. Some simple searches fail to retrieve a substantial percentage of citations. This may result in an uninformed literature review, research funding application or treatment intervention. In addition to ensuring that keywords, spelling and medical subject headings (MeSH) accurately reflect the nature of the search, database users should include wildcards and truncation and adapt their search strategy substantially to retrieve the maximum number of appropriate citations possible. Librarians should be aware of these differences when making purchasing decisions, carrying out literature searches and planning user education. 相似文献
20.
R J Markert A J Parisi H V Barnes S Cohen K Goldenberg L E Mieczkowski M Dunn R M Siervogel 《Bulletin of the Medical Library Association》1989,77(2):133-138
The experiences of medical students, residents, and faculty with a computerized literature searching system were evaluated. Third-year medical students, internal medicine and family practice residents, and full-time and voluntary faculty at one medical school had the opportunity to use a full-text and bibliographic medical literature retrieval system free of charge for an eleven-month period. Subjects conducted nearly nine thousand literature searches over a period of 942 system hours. Questionnaire data showed that participants could learn to use and would use an electronic information system, felt capable of using the system, utilized the system for a variety of purposes and in a number of different ways, and viewed the system as a valuable tool in searching the medical literature. The results are discussed in the context of the educational needs of the four user-groups and medical education planning by institutions. 相似文献