Search (20 results, page 1 of 1)

Rada, R.: Knowledge-sparse and knowledge-rich learning in information retrieval (1987) 0.01

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Source: Information processing and management. 23(1987) no.3, S.195-210

Rada, R.: Writing and reading hypertext : an overview (1989) 0.00

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Source: Journal of the American Society for Information Science. 40(1989), S.164-171

McMath, C.; Tamararu, B.; Rada, R.: Graphical interface to thesaurus-based information retrieval system (1988) 0.00

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Rada, R.; Wang, W.; Birchall, A.: Retrieval hierarchies in hypertext (1993) 0.00

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Source: Information processing and management. 29(1993) no.3, S.359-372

Rada, R.: Converting a textbook to hypertext (1992) 0.00

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Source: ACM transactions on information systems. 10(1992) no.3, S.194-315

Rada, R.; Bicknell, E.: Ranking documents with a thesaurus (1989) 0.00

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Source: Journal of the American Society for Information Science. 40(1989) no.5, S.304-310

Rada, R.; Liu, Z.; Zheng, M.: Connecting educational information spaces (1997) 0.00
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Abstract

Online textbooks can be connected to other sources of information to improve their educational value. We describe 2 case studies. One used in a medical textbook and connected to medical journal abstracts via a thesaurus. The textbook, journal abstracts, and thesaurus were stored on a CD-ROM. The other case study shows a textbook on the WWW that is connected to various other sources of information. About half the book references are to web sites, and the textbook is part of an online course that is connected to an online catalog and other courses. Such linkages among information spaces should help students navigate the information relevant to their studies

Rada, R.: Medical knowledge and hypermedia (1992) 0.00

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Abstract: Describes the history of the Univ. of Liverpool Research Group and its vision. The vision is to merge medical knowledge and hypermedia to produce more powerful information generation and improve access tools for those in health care. Like GALEN, the plan is to improve the construction of knowledge bases and provide user interfaces to medical information

McMath, C.F.; Tamaru, R.S.; Rada, R.: ¬A graphical thesaurus-based information retrieval system (1989) 0.00

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Rada, R.; Mili, H.: Document reuse : organizing, finding, and reorganizing content (1992) 0.00
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Abstract

Existing structures should be exploited as best as possible in the course of document reuse. Reuse may take multiple forms: rearranging a single document so as to provide different views of the same information, copying a portion of a single document to as to provide a portion of a new document, and combining portions of existing documents to constitute a new document. Algortihms are presented to do such reuse, examples are provided. For significant reuse the information in existing documents need to be abstracted so as to highlight the conceptual pattern

Source

International journal of information management. 12(1992) no.4, S.310-319
Chen, C.; Rada, R.; Zeb, A.: ¬An extended fisheye view browser for collaborative writing (1994) 0.00
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Abstract

Investigates information-seeking tasks and associated cognitve issues in the context of interacting with an evolving collaborative hypertext. Fishexe view browsers were used to facilitate exploring in a large information space. The fishexe view browser was extended to incorporate word frequencies. The effects of the fisheye view browser and the changing document were tested with 2x2 factorial experiment. Multivariate tests founs a significant interaction between the 2 factors and a significant main effect of the fisheye view browser. The users who had access to the word frequency information performed their tasks more effectively than the users without access to word frequencies. This work implies that several aspects of an evolving hypertext might als be useful incorporated in an associated fishexe view browser

Rada, R.: Small, medium, and large hypertext (1991) 0.00

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Source: Information processing and management. 27(1991) no.6, S.659-677

Birchall, A.; Deakin, A.; Rada, R.: Knowledge automation and the need for intermediaries (1994) 0.00
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Abstract

Draws together research from a variety of disciplines to consider why and how information technology is qualitatively different from older technologies of information, and why this promotes changes at both the individual and the social level. Concludes from this analysis that there are 2 diverging directions for organizational and societal development: towards technocracy or towards the learning organization and the learning society. In both there will be roles that could be filled by librarians, but the learning organization's network structure would offer many more opportunities for active intermediary roles, and it is in accord with the social ethic of the library profession. In a technocracy, the librarian might assume the high status role of 'knowledge manager' but be out of touch with the ultimate users of information. Considers the pursuit of professional status by librarians as not being the best way to ensure the continuation of the 'social ethic' according to which librarians are educated. A new model of professionalism is needed along the lines suggested by D.A. Schon for the 'reflective practioner', in which knowledge and expertise are collaboratively developed in the interchange between the professional and the client

Source

Journal of librarianship and information science. 26(1994) no.4, S.181-192
Rada, R.: Focus on links : a holistic view of hypertext (1991) 0.00
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Abstract

The disciplines of human-computer interaction, computer-supported collaborative work, information storage and retrieval, and artificial intelligence should complement one another in the new discipline of hypertext. This holistic view of hypertext focuses on links: links within a document (microtext), links among documents (macrotext), links among people (grouptext), and dynamic links (expertext). The principles and systems which are relevant to creating and accessing hypertext can be usefully presented under the heading of text, microtext, macrotext, grouptext and expertext. From text to expertext, people consistently use hierarchical structures, particularly hierarchical semantic nets, to organize information

Chen, C.; Rada, R.: Interacting with hypertext : a meta-analysis of experimental studies (1996) 0.00

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Abstract: Presents a study on hypertext examining the cognitive styles and spatial ability of users; the complexity of tasks; and the strucutre of information organization and the visualization of the structure. Future work on hypertext usability should emphasize task taxonomies along with longitudinal and ethnographic studies for a deep understanding of the interactions between users and hypertext
Theme: Information

Rada, R.: Hypertext and paper : a special synergy (1991) 0.00

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Source: International journal of information management. 11(1991) no.1, S.14-22

Rada, R.: Hypertext, multimedia and hypermedia (1995) 0.00
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Abstract

The concepts of hypertext, multimedia and hypermedia are often confused, but can defined thus: hypertext is text with links, multimedia is synchronized media, and hypermedia is multimedia with links. Presents descriptions of systems for hypertext, multimedia and hypermedia. The computer storage and processing requirements for multimedia are orders of magnitudes greater than those for hypertext. Nevertheless, the hypertext model can be extended to deal with hypermedia by including multimedia synchronization capabilities. Information technology and its associated terminology should help people effectively compare experiences and thus have more influence on future developments
Rada, R.: Connecting and evaluating thesauri : issues and cases (1987) 0.00
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Abstract

Connecting and evaluating thesauri is an important task for the systematic development of better information retrieval systems. Connecting thesauri includes not only determining when terms in different thesauri are the same but also determining what kinds of relationships can be transferred from one thesaurus to another. This paper first presents issues in connecting and evaluating thesauri. Various experiments in connecting a particular thesaurus, the Medical Subject Headings, with other medical thesauri are described. In these experiments, similar terms in two thesauri are recognized and then differences in two thesauri are exploited to create more powerful thesauri. Part of the evaluation requires the thesaurus to support automatic indexing and retrieving of documents
Rada, R.: Maintaining thesauri and metathesauri (1990) 0.00
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Abstract

Maintaining a thesaurus is a time-consuming task which should go hand-in-hand with the indexing of information and should be supported by software. To connect different document databases their respective thesauri should be related. The most straightforward way to support to support this by computer is to map the terms of one thesaurus to those of another. Such a mapping creates one kind of metathesaurus. As citation systems are extended to include full-text online, a new thesaurus may be used to index individual paragraphs. To illustrate these principles several computer systems are described which help people maintain thesauri and metathesauri. Particular success has been had by the National Library of Medicine with its Medical Subject Headings and its Unified Medical Language System
Rada, R.: Interactive media (1995) 0.00
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Abstract

The subject of this book is the relationship between people and interactive media. Written by one of the world's leading experts on this subject, this book explores how hypermedia, groupware, and networks change the way in which people, gropus and organizations work and interact. Its wide-ranging focus discusses the emergence of new technologies and demonstrates by considering real-life case studies the impact each has had on the way we view and interact with colleagues and information. With its emphasis on actual examples of usage, the author provides both practitioners and students with a fascinating glimpse of the future of these media and their applications.

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