-
Rada, R.: Maintaining thesauri and metathesauri (1990)
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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.: Hypertext: from text to expertext (1991)
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- COMPASS
- Software / Documentation
- Footnote
- Rez. in: Journal of documentation 48(1992) S.98-99 (P. Brown); Knowledge organization 20(1993) no.2, S.106-107 (dt.), no.3, S.172-173 (engl.) (R. Kuhlen)
- Subject
- Software / Documentation
-
Rada, R.: Interactive media (1995)
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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.
- Content
- The individual and hypermedia; human-computer interaction - hypertext - multimedia - the group and groupware; group and groupware principles - groupware applications; the organization and networks; the organization - networks and their applications; organizational case studies
-
Rada, R.; Mili, H.; Bicknell, E.: Development and application of a metric on semantic nets (1989)
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- Source
- IEEE transactions on systems, man, and cybernetics. 19(1989) no.1, S.17-30
-
Rada, R.: Small, medium, and large hypertext (1991)
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- Abstract
- Reviews the different types of hypertext systems and suggests that 3 types of hypertext exist: small, medium, and large volume hypertext
-
Rada, R.: Focus on links : a holistic view of hypertext (1991)
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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
-
Rada, R.: Hypertext, multimedia and hypermedia (1995)
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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
- Source
- New review of hypermedia and multimedia. 1995, no.1, S.1-21
-
Rada, R.: Connecting and evaluating thesauri : issues and cases (1987)
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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
-
Wang, W.; Rada, R.: Experiences with semantic net based hypermedia (1995)
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- Abstract
- The Many Using and Creating Hypermedia (MUCH) systems is based on the Dexter model and treats the storage layer as a semantic net. The MUCH system provides a numer of recommended link types for representing application domain concepts, such as thesauri, documents and annotations. users of the system are expected to use those link types in the course of authoring meaningful hypermedia. based on the logs of usage of the MUCH system over 2 years by over 200 people, contrary to the designers' expectations, users did not exploit the ability to type semantic links. Typically authors used the default link type regardless of their semantic intentions. When a link type other than the default type was chosen, that choice was often inconsistent with the way another user would able a similar link. The system has proven to be useful for authoring conventional documents. Authors, however, were not practically able to produce hypertext documents. Based on these experiences a new system, RICH (Reusable Intelligent Collaborative Hypermedia), has been designed and built which emphasizes rules for typing links and maintaining the integrity of the semantic net
- Source
- International journal of human-computer studies. 43(1995) no.3, S.419-439
-
Rada, R.: Hypertext and paper : a special synergy (1991)
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- Abstract
- Some people argure that hypertext is easy to write, is hard to create by converting existing text into hypertext, and has a massive market. This paper argures the contrary. First, Hypertext is hard to write. Second, automatically converting a text into hypertext is, to a first approximation, easy. Third, successful marketing of hypertext depends on having a large volume of material that is also available in paper form
- Source
- International journal of information management. 11(1991) no.1, S.14-22
-
Rada, R.: Converting a textbook to hypertext (1992)
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- Source
- ACM transactions on information systems. 10(1992) no.3, S.194-315
-
Rada, R.; Mili, H.: Document reuse : organizing, finding, and reorganizing content (1992)
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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.: Interacting with hypertext : a meta-analysis of experimental studies (1996)
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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
-
Birchall, A.; Deakin, A.; Rada, R.: Knowledge automation and the need for intermediaries (1994)
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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.: Medical knowledge and hypermedia (1992)
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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
-
Rada, R.; Mili, H.; Letourneau, G.; Johnston, D.: Creating and evaluating entry terms (1988)
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- Abstract
- An indexing language is made more accessible to searchers and indexers by the presence of entry terms or near-synonyms. This paper first presents an evaluation of existing entry terms and then presents and tests a strategy for creating entry terms. The key tools in the evaluation of the entry terms are documents already indexed into the Medical Subject Headings (MeSH) and an automatic indexer ...
- Source
- Journal of documentation. 44(1988), S.19-41
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Rada, R.: Writing and reading hypertext : an overview (1989)
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- Source
- Journal of the American Society for Information Science. 40(1989), S.164-171
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McMath, C.; Tamararu, B.; Rada, R.: Graphical interface to thesaurus-based information retrieval system (1988)
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- Source
- International journal of man-machine studies. 31(1988) no.2, S.121-147
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Rada, R.: Hypertext writing and document reuse : the role of a semantic net (1990.)
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- Abstract
- When document components are classified and then recombined during document re-use, a semantic net may serve as the classification language. A theory of analogical inheritance, applied to this semantic net, guides the reorganisation of document components. Authors index paragraphs from various sources with node-link-node triples from a semantic net and then use programs to transverse the semantic net and generate various outlines. The program examines node and link names in deciding which path to take. Describes how these techniques helped in the re-use: parts of an existing book to write a new one
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Rada, R.; Bicknell, E.: Ranking documents with a thesaurus (1989)
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- Source
- Journal of the American Society for Information Science. 40(1989) no.5, S.304-310
