共查询到20条相似文献，搜索用时 46 毫秒
1.
《Library Collections, Acquisitions, and Technical Services》2003,27(3):305-316
This article describes the creation and development of The Donation Programs for Books, Journals and Media Web page housed on the Health Sciences Library (HSL), University at Buffalo (UB) Web site []http://ublib.buffalo.edu/hsl/donationprogram.html]. The evolution of the page is traced from its beginnings in February 1998 to the present and other donation resources are mentioned. Gifts and Exchange (G&E) practices in libraries are discussed. Figures showing the Web page as it appeared at three different points in time are included, as well as a separate related story of a local UB initiative to collect and ship medical books to Afghanistan. 相似文献
2.
3.
《图书馆管理杂志》2013,53(3-4):407-419
Abstract The Web is often characterized as a universal information space, in the sense that the provision of and access to Web content is open to all. It is well known, however, that the majority of Web content originates from a small group of English-speaking countries, chiefly the United States. This paper examines trends in the internationalization of Web content, and in particular, whether the Web is becoming increasingly globalized as it matures, and to what segment of the world's countries and languages it currently extends. Sample data from 1998 and 1999 suggests that the Web's content is still far from a true global cross-section, but is slowly expanding both in terms of its geographical origins and the languages in which it is made available. 相似文献
4.
5.
虚拟图书馆中网页的自动分类研究 总被引：1，自引：0，他引：1
臧国全 《现代图书情报技术》2002,18(3):28-31
概括了国内外对电子文本及Web网页进行自动分类的研究和试验,论述了虚拟图书馆中对网页进行自动分类与一般搜索引擎中对网页进行自动分类的区别,提出了一种用于虚拟图书馆中对网页进行自动分类的方法,并描述了按照此方法建立的“图书馆学情报学”虚拟图书馆的自动分类系统,对分类结果进行了分析。 相似文献
6.
7.
John W. Hoopes 《Archives and Museum Informatics》1997,11(2):87-105
In the final scene of Raiders of the Lost Ark, a crate containing the object of Indiana Jones' quest is wheeled into an immense warehouse for indefinite storage and questionable research access. Unfortunately, this fate is not all that far from reality. Collections of archaeological and ethnographic materials ranging from stone axes, broken potsherds, and carved monuments to baskets, ceremonial masks, and skin canoes have been held by museums collections since the Renaissance. However, their inestimable value and unique conservation and curatorial requirements often conspire to remove them from the reach of all but the most diligent scholars. The potential of the Web to enhance the quality of research on archaeological and ethnographic collections is enormous. This paper will examine ways that one can use the Web to enhance research and improve access to a variety of materials; while there are many other resources for archaeology available on the Web, this paper focusses on museum-related sites. It will also explore the potential of the Web for innovative research strategies. Digitization of catalogs, associated documents, and images to help one locate and study collections and specific artifacts are just one approach. Others include the connection of devices to the Web, such as cameras and microscopes, the creation of virtual reference collections, and the establishment of research networks that will enhance the identification and analysis of material culture. This paper will also consider the role the Web could play in issues of cultural property, contributing to and in many ways intensifying ongoing debates of ownership, curation, conservation, and repatriation of sensitive materials. 相似文献
8.
Web网是个巨大的、杂乱无章的数据库,图书馆的任务就是要将其变为我们所需要的Web网－－一个数字化的图书馆。它必须具备五个要素;有选择的馆藏,便利的、开放性的检索途径,组织化的资料,珍品收藏和用户助手 相似文献
9.
《Journal of Web Librarianship》2013,7(2-3):287-306
ABSTRACT Although there is a proliferation of information available on the Web, and law professors, students, and other users have a variety of channels to locate information and complete their research activities, the law library catalog still remains an important source for offering users access to information that has been evaluated and cataloged by experts. The usability of the catalog needs to be effectively measured before any necessary improvements can be made. This study was undertaken to investigate the information retrieval patterns of users of the Rutgers Law Library Online Public Access Catalog and to develop the catalog into a more effective search tool for these users. This study used an experimental approach to measure the usability of our catalog by analyzing the transaction logs from the OPAC system and the results from Google Analytics. The findings provided not only important information on user demographics and their computer systems, but also more insight on the search behaviors of users. The specific findings included the following:
-
As a Web-analytic tool Google Analytics provided extensive information on the OPAC and the navigational behaviors of users.
-
Fifty-eight percent of our users visited the Web site regularly.
-
The most popular search method, which was employed by 37% of our users, was by title.
-
Most patrons used computer systems with a high resolution and color depth monitor and visited the catalog Web site with a high-speed Internet connection.
-
Suggestions were made by the authors to improve the users’ search experience of the catalog Web site.
10.
《广播与电子媒介杂志》2013,57(4):556-568
The diffusion of the establishment of World Wide Web sites as a campaign tactic into the 1998 Congressional and Gubernatorial elections is examined based on the presumption that the more relative advantages a campaign perceives in establishing a site, the more likely they will be to adopt. Thus, campaigns which spent more money more frequently adopted. Incumbents, many of whom have non-campaign presences on the Web and thus see fewer benefits, adopted less frequently. 相似文献
11.
The Web contains a tremendous amount of information. It is challenging to determine which Web documents are relevant to a user query, and even more challenging to rank them according to their degrees of relevance. In this paper, we propose a probabilistic retrieval model using logistic regression for recognizing multiple-record Web documents against an application ontology, a simple conceptual modeling approach. We notice that many Web documents contain a sequence of chunks of textual information, each of which constitutes a record. This type of documents is referred to as multiple-record documents. In our categorization approach, a document is represented by a set of term frequencies of index terms, a density heuristic value, and a grouping heuristic value. We first apply the logistic regression analysis on relevant probabilities using the (i) index terms, (ii) density value, and (iii) grouping value of each training document. Hereafter, the relevant probability of each test document is interpolated from the fitting curves. Contrary to other probabilistic retrieval models, our model makes only a weak independent assumption and is capable of handling any important dependent relationships among index terms. In addition, we use logistic regression, instead of linear regression analysis, because the relevance probabilities of training documents are discrete. Using a test set of car-ads and another one for obituary Web documents, our probabilistic model achieves the averaged recall ratio of 100%, precision ratio of 83.3%, and accuracy ratio of 92.5%. 相似文献
12.
Web2．0能为建立竞争情报人际网络做些什么 总被引：10，自引：0，他引：10
建立人际网络是竞争情报研究的重要内容。Web2.0的兴起可为实施这一艰难任务提供希望和机会。Web2.0的许多技术,如IM、RSS等等,是建设竞争情报人际网络的工具。Web2.0可帮助人们充分利用"弱链接"获取更多的人脉信息、通过"桥"寻找"强连带"、利用结构洞理论改进信息控制,等等。表1。图1。参考文献11。 相似文献
13.
14.
Kleinbergs HITS algorithm (Kleinberg 1999), which was originally developed in a Web context, tries to infer the authoritativeness of a Web page in relation to a specific query using the structure of a subgraph of the Web graph, which is obtained considering this specific query. Recent applications of this algorithm in contexts far removed from that of Web searching (Bacchin, Ferro and Melucci 2002, Ng et al. 2001) inspired us to study the algorithm in the abstract, independently of its particular applications, trying to mathematically illuminate its behaviour. In the present paper we detail this theoretical analysis. The original work starts from the definition of a revised and more general version of the algorithm, which includes the classic one as a particular case. We perform an analysis of the structure of two particular matrices, essential to studying the behaviour of the algorithm, and we prove the convergence of the algorithm in the most general case, finding the analytic expression of the vectors to which it converges. Then we study the symmetry of the algorithm and prove the equivalence between the existence of symmetry and the independence from the order of execution of some basic operations on initial vectors. Finally, we expound some interesting consequences of our theoretical results.Supported in part by a grant from the Italian National Research Council (CNR) research project Technologies and Services for Enhanced Content Delivery. 相似文献
15.
Melissa L. Rethlefsen Mary Piorun J. Dale Prince 《Journal of the Medical Library Association》2009,97(4):253-259
Objectives:
The research evaluated participant satisfaction with the content and format of the “Web 2.0 101: Introduction to Second Generation Web Tools” course and measured the impact of the course on participants'' self-evaluated knowledge of Web 2.0 tools.Methods:
The “Web 2.0 101” online course was based loosely on the Learning 2.0 model. Content was provided through a course blog and covered a wide range of Web 2.0 tools. All Medical Library Association members were invited to participate. Participants were asked to complete a post-course survey. Respondents who completed the entire course or who completed part of the course self-evaluated their knowledge of nine social software tools and concepts prior to and after the course using a Likert scale. Additional qualitative information about course strengths and weaknesses was also gathered.Results:
Respondents'' self-ratings showed a significant change in perceived knowledge for each tool, using a matched pair Wilcoxon signed rank analysis (P<0.0001 for each tool/concept). Overall satisfaction with the course appeared high. Hands-on exercises were the most frequently identified strength of the course; the length and time-consuming nature of the course were considered weaknesses by some.Conclusion:
Learning 2.0-style courses, though demanding time and self-motivation from participants, can increase knowledge of Web 2.0 tools.Highlights
- Course participants'' knowledge of Web 2.0 tools increased significantly.
- Medical Library Association members liked the online course format, particularly the hands-on exercises and self-pacing.
- There was no significant difference in course completion rate or course satisfaction among participants from academic, hospital, or other library settings.
- Few survey respondents pointed specifically to workplace technology blocking as a reason for non-completion, though this underestimates the effect of such blocking on hospital and corporate library staff.
Implications
- MLA members appreciate having online continuing education (CE) courses. New short, online CE courses were developed based on the findings of this survey.
- Hands-on exercises may improve learning and increase motivation.
- Time and self-motivation are necessary for completing online courses.
16.
17.
Junior Tidal 《Journal of Web Librarianship》2017,11(1):16-34
This article examines the usability testing of a responsively redesigned library Web site. Responsive design provides a unified user experience regardless of the device used to view a site. The study's aim is twofold: to determine if the responsively designed site and its external online services support users’ information seeking needs, and to discover if there is a singular experience across different devices. A cognitive walkthrough was the main testing instrument used in gathering input. Over two rounds of testing, students of various class years and technological skill from the New York City of Technology (City Tech), CUNY participated in the study. The first round of testing for this usability study on the library Web site was previously documented (Tidal 2015). This article presents the findings and comparisons between the first and second round of usability testing. The study found not only numerous improvements that could enhance the library Web site, but also the lack of a unified experience between tablet, smartphone, and desktop users, despite using a responsive design. Smartphone users were at a disadvantage in utilizing library resources. The study also found there was a significant usability impact in using a mobile-optimized discovery tool among users in comparison to its Web OPAC predecessor. 相似文献
18.
19.
Locating and Recognizing Text in WWW Images 总被引：4，自引：0，他引：4
The explosive growth of the World Wide Web has resulted in a distributed database consisting of hundreds of millions of documents. While existing search engines index a page based on the text that is readily extracted from its HTML encoding, an increasing amount of the information on the Web is embedded in images. This situation presents a new and exciting challenge for the fields of document analysis and information retrieval, as WWW image text is typically rendered in color and at very low spatial resolutions. In this paper, we survey the results of several years of our work in the area. For the problem of locating text in Web images, we describe a procedure based on clustering in color space followed by a connected-components analysis that seems promising. For character recognition, we discuss techniques using polynomial surface fitting and fuzzy n-tuple classifiers. Also presented are the results of several experiments that demonstrate where our methods perform well and where more work needs to be done. We conclude with a discussion of topics for further research. 相似文献
20.
Web search algorithms that rank Web pages by examining the link structure of the Web are attractive from both theoretical and practical aspects. Todays prevailing link-based ranking algorithms rank Web pages by using the dominant eigenvector of certain matrices—like the co-citation matrix or variations thereof. Recent analyses of ranking algorithms have focused attention on the case where the corresponding matrices are irreducible, thus avoiding singularities of reducible matrices. Consequently, rank analysis has been concentrated on authority connected graphs, which are graphs whose co-citation matrix is irreducible (after deleting zero rows and columns). Such graphs conceptually correspond to thematically related collections, in which most pages pertain to a single, dominant topic of interest.A link-based search algorithm A is rank-stable if minor changes in the link structure of the input graph, which is usually a subgraph of the Web, do not affect the ranking it produces; algorithms A,B are rank-similar if they produce similar rankings. These concepts were introduced and studied recently for various existing search algorithms.This paper studies the rank-stability and rank-similarity of three link-based ranking algorithms—PageRank, HITS and SALSA—in authority connected graphs. For this class of graphs, we show that neither HITS nor PageRank is rank stable. We then show that HITS and PageRank are not rank similar on this class, nor is any of them rank similar to SALSA.This research was supported by the Fund for the Promotion of Research at the Technion, and by the Barnard Elkin Chair in Computer Science. 相似文献