Search (325 results, page 1 of 17)

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Abstract

The US Marine Corps has developed an information storage retrieval system, On-line Books that gives remote access to the complete text of the Marine Corps University war-fighting collection. Searching is through hypertext capabilities and document delivery via mailed printouts or electronic mail. Central to the system is the storage machine a main-frame attached, optical disc based network archive searver developed by File Tek Inc. Its main architectural components are: a channel network interface, a storage and transfer processor, a layered storage hierarchy composed of magnetic disc, multiple terabytes of optical discs mounted in a robotic library and shelf storage. Details the storage machine's architecture and describes other projects in the USA currently utilising multigigabyte storage technology

Object

On-line Books

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Source

Encyclopedia of library and information science. Vol.66, [=Suppl.29]

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Abstract

This book constitutes a coherent anthology consisting of invited chapter-length papers on intelligent hypertext techniques with special emphasis on how to apply these techniques to the WWW. The book provides an introductory preface, chapters on information comprehension through hypertext, efficient techniques for adaptive hypermedia, annotated 3D environments on the Web, user models for customized hypertext, conceptual analysis of hypertext, two-level models of hypertext, the TELLTALE dynamic hypertext environment, hypertext for collaborative authoring, information retrieval and information agents

LCSH

World Wide Web (Information retrieval system)

Subject

World Wide Web (Information retrieval system)

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Abstract

In most hypertext systems, information retrieval techniques emphasize browsing or navigational methods which are not thorough enough to find all relevant material, especially when the number of nodes and/or links becomes very large. Reviews the main query-based search techniques currently used in hypertext environments. Explains the experimental methodology. Concentrates on the retrieval effectiveness of these retrieval strategies. Considers ways of improving search effectiveness

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Abstract

Introduces what automatic authoring of a hypertext for information retrieval means. The most difficult part of the automatic construction of a hypertext is the creation of links connecting documents or document fragments that are related. Becaus of this, to many researchers it seemed natural to use information retrieval techniques for this purpose, since information retrieval has always dealt with the construction of relationships between objects mutually relevant. Presents a survey of some of the attempts toward the automatic construction of hypertexts for information retrieval. Identifies and compares scope, advantages and limitations of different approaches. Points out the main and most successful current lines of research

Source

Information processing and management. 33(1997) no.2, S.133-144

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Abstract

Explores the strengths and limitations of hypertext for the online presentation of thesauri used in information retrieval. Examines the ability of hypertext to support each of 3 common types of thesaurus display: graphic, alphabetical, and hierarchical. Presents a design for a hypertext-based hierarchical display that addresses many inadequacies of printed hierarchical displays. Ullustrates how the design might be implemented using a commercially available hypertext system. Considers issues related to the implementation and evaluation of hypertext-based thesauri

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Abstract

Hypertext is an old concept that only recently has been demonstrated in working systems. Examines the conceptual basis of hypertext, reviews some representative hypertext systems, and discusses some of the problems to be faced when hypertext techniques are applied to large-scale information systems. Techniques developed in information retrieval research are seen as useful complements to hypertext that may remedy some of these problems.

Imprint

Medfort, New Jersey : Learned Information Inc.

Source

ASIS '88. Information Technology: planning for the next fifty years. Proceedings of the 51st Annual Meeting of the American Society for Information Science, Atlanta, Georgia, 23-27.10.1988. Vol.25. Ed. by C. L. Borgman and E. Y. Pai

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Abstract

Hypertext uses a browsing rather than a searching strategy. Hypertext systems have found applications in a number of areas. They give users choice of information but this can prove a drawback. Examnines the effectiveness of hypertext as a way of retrieving information and reviews conventional information retrieval techniques. Considers previous attempts at combining information retrieval and hypertext and outlines a prototype systems developed to generate guided tours for users to direct them through hypertext to information they have requested. Discusses how adding this kind of itelligent guidance to a hypertext system would affect its usability as an information system

Source

European journal of information systems. 1(1991) no.4, S.239-247

Theme

Information

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Abstract

Fast, effective, and adaptable techniques are needed to automatically organize and retrieve information an the ever-increasing World Wide Web. In that respect, different strategies have been suggested to take hypertext links into account. For example, hyperlinks have been used to (1) enhance document representation, (2) improve document ranking by propagating document score, (3) provide an indicator of popularity, and (4) find hubs and authorities for a given topic. Although the TREC experiments have not demonstrated the usefulness of hyperlinks for retrieval, the hypertext structure is nevertheless an essential aspect of the Web, and as such, should not be ignored. The development of abstract models of the IR task was a key factor to the improvement of search engines. However, at this time conceptual tools for modeling the hypertext retrieval task are lacking, making it difficult to compare, improve, and reason an the existing techniques. This article proposes a general model for using hyperlinks based an Probabilistic Argumentation Systems, in which each of the above-mentioned techniques can be stated. This model will allow to discover some inconsistencies in the mentioned techniques, and to take a higher level and systematic approach for using hyperlinks for retrieval.

Footnote

Beitrag eines Themenheftes: Mathematical, logical, and formal methods in information retrieval

Source

Journal of the American Society for Information Science and technology. 54(2003) no.4, S.347-355

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Abstract

Reviews briefly hypertext techniques in information handling and retrieval and defines its salient features. Focuses on its strengths and weaknesses as a teaching tool and its potential impact on education

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Abstract

Presents entirely automatic methods for gathering documents for a hypertext, linking the set, and annotating those connections with a description of the type of the link. Document linking is based upon information retrieval similarity measures with adjustable levels of strictness. Applies an approach inspired by relationship visualization techniques and by graph simplification, to show how to identify automatically tangential, revision, summary, expansion, comparisn, contrast, equivalence, and aggregate links

Source

Information processing and management. 33(1997) no.2, S.145-159

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Abstract

Describes the design and implementation of TACHIR, a tool for the automatic construction of hypertexts for information retrieval. Through the use of an authoring methodology employing a set of well known information retrieval techniques, TACHIR automatically builds up a hypertext from a document collection. The structure of the hypertext reflects a 3 level conceptual model which enables navigation among documents, index terms, and concepts using automatically determined links. The hypertext is implemented using the HTML language. It can be distributed on different sites and different machines over the Internet, and it can be navigated using WWW interfaces

Source

Information processing and management. 32(1996) no.4, S.459-476

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Abstract

Considering the characteristics of hypertext systems and problems such as cognitive overload and the disorientation of users, this project studies subject hypertext documents that have undergone conceptual structuring using facets for content representation and improvement of information retrieval during navigation. The main objective was to assess the possibility of the application of topic map technology for automating the compatibilization process of these structures. For this purpose, two dissertations from the UFMG Information Science Post-Graduation Program were adopted as samples. Both dissertations had been duly analyzed and structured on the MHTX (Hypertextual Map) prototype database. The faceted structures of both dissertations, which had been represented in conceptual maps, were then converted into topic maps. It was then possible to use the merge property of the topic maps to promote the semantic interrelationship between the maps and, consequently, between the hypertextual information resources proper. The merge results were then analyzed in the light of theories dealing with the compatibilization of languages developed within the realm of information technology and librarianship from the 1960s on. The main goals accomplished were: (a) the detailed conceptualization of the merge process of the topic maps, considering the possible compatibilization levels and the applicability of this technology in the integration of faceted structures; and (b) the production of a detailed sequence of steps that may be used in the implementation of topic maps based on faceted structures.

Date

22. 2.2013 11:39:23

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Abstract

This article examines searcher behavior and affective response to a hypertext-based bibliographic information retrieval system called HyperLynx for searchers with different search skills and backgrounds. Search times and number of nodes visited were recorded for five specified search queries, and views of the system were recorded for each searcher. No significant differences were found in search times or user satisfaction with the system, indicating that a hypertext-based approach to bibliographic retrieval could be appropriate for a variety of searcher experience levels

Source

Journal of the American Society for Information Science. 46(1995) no.1, S.22-29

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Abstract

Textbooks are more available in electronic format now than in the past. Because textbooks are typically large, the end user needs effective tools to rapidly access information encapsulated in textbooks stored in digital libraries. Statistical similarity-based links among hypertextbooks are a means to provide those tools. In this paper, the design and the implementation of a tool that generates networks of links within and across hypertextbooks through a completely automatic and unsupervised procedure is described. The design is based an statistical techniques. The overall methodology is presented together with the results of a case study reached through a working prototype that shows that connecting hyper-textbooks is an efficient way to provide an effective retrieval capability.

Source

Journal of the American Society for Information Science and technology. 55(2004) no.5, S.414-430

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Abstract

Describes an approach to semi-automatically generate a hypertext from linear texts, based on initially creatign nodes and composite nodes composed of 'mini-hypertexts'. Node-node similarity values are computed using standard information retrieval techniques and these similarity measures are then used to selectively create node-node links based on the strength of similarity between them. The process is a novel one because the link creation process also uses values from a dynamically computed metric which measures the topological compactness of the overall hypertext being generated. Describes experiments on generating a hypertext from a collection of 846 software product descriptions comprising 8,5 MBytes of text which yield some guidelines on how the process should be automated. This text to hypertext conversion method is put into the context of an overall hypertext authoring tool currently under development

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COMPASS

Information retrieval

LCSH

Information retrieval

Subject

Information retrieval
Information retrieval

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Source

Information processing and management. 29(1993), no.3

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Source

14th Information Retrieval Colloquium: Proceedings of the BCS 14th Information Retrieval Colloquium, University of Lancaster, 13-14 April 1992. Ed.: T. McEnery et al

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Abstract

The reader of a hypertext document in a web environment, if maximum use of the document is to be obtained, must visualize the overall structure of the paths through the document as well as the document space. Graphic visualization displays of this space, produced to assist in navigation, are classified into four groups, and Heo and Hirtle compare three of these classes as to their effectiveness. Distortion displays expand regions of interest while relatively diminishing the detail of the remaining regions. This technique will show both local detail and global structure. Zoom techniques use a series of increasingly focused displays of smaller and smaller areas, and can reduce cogitative overload, but do not provide an easy movement to other parts of the total space. Expanding outline displays use a tree structure to allow movement through a hierarchy of documents, but if the organization has a wide horizontal structure, or is not particularly hierarchical in nature such display can break down. Three dimensional layouts, which are not evaluated here, place objects by location in three space, providing more information and freedom. However, the space must be represented in two dimensions resulting in difficulty in visually judging depth, size and positioning. Ten students were assigned to each of eight groups composed of viewers of the three techniques and an unassisted control group using either a large (583 selected pages) or a small (50 selected pages) web space. Sets of 10 questions, which were designed to elicit the use of a visualization tool, were provided for each space. Accuracy and time spent were extracted from a log file. Users views were also surveyed after completion. ANOVA shows significant differences in accuracy and time based upon the visualization tool in use. A Tukey test shows zoom accuracy to be significantly less than expanding outline and zoom time to be significantly greater than both the outline and control groups. Size significantly affected accuracy and time, but had no interaction with tool type. While the expanding tool class out performed zoom and distortion, its performance was not significantly different from the control group.

Source

Journal of the American Society for Information Science and technology. 52(2001) no.8, S.666-675