PubMed, Internet Grateful Med, and Ovid: a comparison of three MEDLINE Internet interfaces

Three MEDLINE Internet interfaces are compared: PubMed, Internet Grateful Med, and Ovid MEDLINE. Although these interfaces all search MEDLINE, significant differences exist in terms of their search interfaces, presentation of results, and special features. This paper examines these variations and explores some of the advantages and disadvantages of the three interfaces.     

A quiver full of arrows: recommended Web-based tutorials for PubMed,PowerPoint, Ovid MEDLINE,and FrontPage

Librarians often are responsible for instructing their patrons in the use of various databases and popular software packages. When this instruction can't be provided through face-to-face contact, Web-based tutorials can be useful tools to bridge the information gap. This article recommends Web-based tutorials for PubMed, Ovid MEDLINE, PowerPoint, and FrontPage.     

The effect of CD-ROM MEDLINE on online end user and mediated searching.

Since 1970, Indiana University School of Medicine Library (IUSML) has traditionally been a high volume online searching institution. The library recently implemented an end user searching program which includes MEDLINE on CD-ROM. The effect of CD-ROM on online end user and mediated searching is discussed. Comparative statistics are provided by category of search service. CD-ROM has had a dramatic lowering effect on online end user searching and has had little effect on mediated searching. IUSML's experience with CD-ROM technology has been a positive one. Trained end users have become IUSML's greatest asset.     

Developing efficient search strategies to identify reports of adverse effects in MEDLINE and EMBASE

OBJECTIVE: This study aimed to assess the performance, in terms of sensitivity and precision, of different approaches to searching MEDLINE and EMBASE to identify studies of adverse effects. METHODS: Five approaches to searching for adverse effects evidence were identified: approach 1, using specified adverse effects; approach 2, using subheadings/qualifiers; approach 3, using text words; approach 4, using indexing terms; approach 5, searching for specific study designs. The sensitivity and precision of these five approaches, and combinations of these approaches, were compared in a case study using a systematic review of the adverse effects of seven anti-epileptic drugs. RESULTS: The most sensitive search strategy in MEDLINE (97.0%) required a combination of terms for specified adverse effects, floating subheadings, and text words for 'adverse effects'. In EMBASE, a combination of terms for specified adverse effects and text words for 'adverse effects' provided the most sensitive search strategy (98.6%). Both these search strategies yielded low precision (2.8%). CONCLUSIONS: A highly sensitive search in either database requires a combination of approaches, and has low precision. This suggests that better reporting and indexing of adverse effects is required and that an effective generic search filter may not yet be feasible.     

The performance of adverse effects search filters in MEDLINE and EMBASE

Background: Search filters can potentially improve the efficiency of searches involving electronic databases such as medline and embase . Although search filters have been developed for identifying records that contain adverse effects data, little is known about the sensitivity of such filters. Objectives: This study measured the sensitivity of using available adverse effects filters to retrieve papers with adverse effects data. Methods: A total of 233 included studies from 26 systematic reviews of adverse effects were used for analysis. Search filters from medline and embase were tested for their sensitivity in retrieving the records included in these reviews. In addition, the sensitivity of each individual search term used in at least one search filter was measured. Results: Subheadings proved the most useful search terms in both medline and embase . No indexing terms in medline achieved over 12% sensitivity. The sensitivity of published search filters varied in medline from 3% to 93% and in embase from 57% to 97%. Whether this level of sensitivity is acceptable will be dependent on the purpose of the search. Conclusions: Although no adverse effects search filter captured all the relevant records, high sensitivity could be achieved. Search filters may therefore be useful in retrieving adverse effects data.     

The effect of CD-ROM MEDLINE on online end-user and mediated searching: a follow-up study

Indiana University School of Medicine Library (IUSML) has traditionally been a high volume searching institution. The dramatic effect of CD-ROM on online end-user searching and the negligible effect on mediated searching was reported in an earlier study. This follow-up study reveals that the proportion of mediated searching has been drastically reduced from 94% in 1986/87 to 39% as of November 1989. Mediated searches are declining in absolute numbers as well. End-user searching, by contrast, has increased by 54% percent over the previous year. A related trend is the increased use of CD-ROM by the librarian as an alternative to mediated online searching. These trends are expected to continue as IUSML expands its CD-ROM operation to include other databases. As mediated searching declines, the librarian's role will increasingly include end-user training.     

Comparing the self-described searching knowledge of first-year medical and dental students before and after a MEDLINE class

Do students need MEDLINE instruction? Do self-described knowledge and search skills match actual ability? To address these questions, librarians developed an assessment tool, a self-administered pre-test/post-test of eighteen skills and concepts taught in the MEDLINE class. By their own assessment, 70% or more of the medical and dental students learned something about each concept taught during the workshop. The study convinced faculty and students that the MEDLINE class is necessary. Librarians and associated faculty agree that the class is important and should continue to be mandatory.     

Non-english web search: an evaluation of indexing and searching the Greek web

The study reports on a longitudinal and comparative evaluation of Greek language searching on the web. Ten engines, five global (A9, AltaVista, Google, MSN Search, and Yahoo!) and five Greek (Anazitisi, Ano-Kato, Phantis. Trinity, and Visto), were evaluated using (a) navigational queries in 2004 and 2006; and (b) by measuring the freshness of the search engine indices in 2005 and 2006. Homepage finding queries for known Greek organizations were created and searched. Queries included the name of the organization in its Greek and non-Greek, English or transliterated equivalent forms. The organizations represented ten categories: government departments, universities, colleges, travel agencies, museums, media (TV, radio, newspapers), transportation, and banks. The freshness of the indices was evaluated by examining the status of the returned URLs (live versus dead) from the navigational queries, and by identifying if the engines have indexed 32480 active (live) Greek domain URLs. Effectiveness measures included (a) qualitative assessment of how engines handle the Greek language; (b) precision at 10 documents (P@10); (c) mean reciprocal rank (MRR); (d) Navigational Query Discounted Cumulative Gain (NQ-DCG), a new heuristic evaluation measure; (e) response time; (f) the ratio of the dead URL links returned, (g) the presence or absence of URLs and the decay observed over the period of the study. The results report on which of the global and Greek search engines perform best; and if the performance achieved is good enough from a user’s perspective.     

A comparison of manual and online searching of government document indexes

The online and printed equivalents of the GPO's Monthly Catalog, the National Technical Information Service's Government Reports Announcements & Index, and Congressional Information Service's CIS Index have been examined to compare the recall, precision, overlap, and cost-effectiveness of online and manual searching. The online searches were less labor intensive and retrieved more relevant citations than the manual searches. However, a large number of citations retrieved were not duplicated in equivalent printed and online indexes.     

Sensitivity and precision of adverse effects search filters in MEDLINE and EMBASE: a case study of fractures with thiazolidinediones

Background: Search filters have been developed in MEDLINE and EMBASE to help overcome the challenges of searching electronic databases for information on adverse effects. However, little evaluation of their effectiveness has been carried out. Objectives: To measure the sensitivity and precision of available adverse effects search filters in MEDLINE and EMBASE. Methods: A case study systematic review of fracture related adverse effects associated with the use of thiazolidinediones was used. Twelve MEDLINE search strategies and three EMBASE search strategies were tested. Results: Nineteen relevant references from MEDLINE and 24 from EMBASE were included in the review. Four search filters in MEDLINE achieved high sensitivity (95 or 100%) with an improved level of precision from searches without any adverse effects filter. High precision in MEDLINE could also be achieved (up to 53%) using search filters that rely on Medical Subject Headings. No search filter in EMBASE achieved high precision (all were under 5%) and the highest sensitivity in EMBASE was 83%. Conclusions: Adverse effects search filters appear to be effective in MEDLINE for achieving either high sensitivity or high precision. Search filters in EMBASE, however, do not appear as effective, particularly in improving precision.     

认知信息检索研究的发展与展望

剖析认知信息检索概念和与之相关的几个重要概念，如认知观、信息交互、情境、任务、多元表示、相关性；对相关研究模型——Wilson模型、Kuhlthau模型、Vakkari模型、Wang．Soergel模型、Ingwersen模型、Saracevic模型进行评述，并回顾认知信息检索所取得的成就，展望其未来发展方向。     

因特网资源的快速检索工具(下)

6 MP3SPY MP3音乐搜索器MP3SPY,除了一般搜索器的搜索功能外,还分门别类地将音乐分成各个频道,并且按此可搜索到具体想听的乐曲而非只列出该乐曲所在主页,所以你通过点击可以立即收听到想听的乐曲。它提供的在线聊天与文件传输功能更使你能与其他音乐爱好者进行交流。所有操作都集中在MP3SPY的主窗口,下面分别介绍各个功能钮的含义:GenreButtons:这里列出了各个音乐频道,包括Rock摇滚、Country乡村歌曲、Rap说唱乐、Dance舞曲     

Live Curriculum Vitae (CV) of Researchers Based on Scopus and PubMed Databases; a New Method in Scientometrics

In this study, an advanced system in order to provide live CV of researchers based on Scopus and PubMed databases was designed and introduced. The designed system can be considered as one of the new and innovative achievements in scientometrics and international publishing. Integrating published papers of researchers using this advanced system can improve controlling and also the quality of international scientometrics. Quick response, high accuracy in analysis of the received data from different indexing databases and offering a full report are some of the salient features of this system. Certainly, this system can be used as a useful tool by researchers and various scientific institutions across the world. The traditional scientometrics technologies in this field should be abolished and this system as an innovative and new technology should be introduced to the scientific world which will lead to increase the quality of the international scientometrics process.     

通用文献信息检索系统(GIRS)设计探讨

本文简要地介绍了索引的种类、索引工作在社会生产和科学研究领域的重要性及其手工编制中所存在的问题，并详细描述了利用计算机实现通用信息检索系统（GIRS）的设计思想及原则，介绍了系统实现方法及各模块的功能，包括索引的建立、计算机捡索、索引排序、索引排版和系统维护五项功能。     

A comparison of the currency of secondary information sources in the biochemical literature. II. MEDLINE online and on CD-ROM

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Critical rationalism and the search for standard (field-normalized) indicators in bibliometrics

Bibliometrics plays an increasingly important role in research evaluation. However, no gold standard exists for a set of reliable and valid (field-normalized) impact indicators in research evaluation. This opinion paper recommends that bibliometricians develop and analyze these impact indicators against the backdrop of Popper’s critical rationalism. The studies critically investigating the indicators should publish the results in such a way that they can be included in meta-analyses. The results of meta-analyses give guidance on which indicators can then be part of a set of indicators used as standard in bibliometrics. The generation and continuous revision of the standard set could be handled by the International Society for Informetrics and Scientometrics (ISSI).     

Two representations of the research process: The preparing,searching, and using (PSU) and the beginning,acting and telling (BAT) models

Two representations of a three-stage diagrammatic model that holistically depicts the research process are presented. The representations incorporate elements culled from existing information-seeking behavior and information literacy instruction research, as well as evidence gathered from a study of third grade elementary school students, as they worked to fulfill a class project's requirements. Both representations are content independent, attribute equal importance to each of the three stages, and target the K-12 educational environment. The full representation, the preparing, searching, using (PSU) model, is intended for use by instructors and more advanced students. The model identifies elements inherent within the three stages of the research process including actions, affective behaviors, impact factors, learning, and reflection. The simpler representation, the beginning, acting, telling (BAT) model, which is embedded into the PSU, presents only the three main stages and the actions associated with those stages using a familiar graphic (a bat) and a mnemonic device to visually present the basic elements of the research process to younger elementary school students. The PSU model is designed to identify and address the unique information behaviors of students (affective, cognitive, and physical) and factors that may impact the research process. As a result, the representations can be used by educators, including information professionals and teachers, to inform instruction, such as lesson planning, development of assignments, resource location and evaluation, and the use of information, to fully exploit all aspects of the research process. The PSU model can also be used to teach more sophisticated concepts to older students by introducing more complex features gradually to the BAT model.