-
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.: 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
-
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.: 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
-
Rada, R.; Bird, G.; Zheng, M.: Hypertext interchange using ICA (1995)
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- Source
- Journal of documentation. 51(1995) no.2, S.99-117
-
Rada, R.; You, G.-N.: Balanced outlines and hypertext (1992)
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- Abstract
- Navigation problems in a hypertext migth be reduced, if mutiple, coherent views of the hypertext were available. Document outlines help readers appreciate the structure and meaning of the document. Proposes measures of syntactic and lexical balance in an outline and show in a sample of documents the degree to which these balances occur. Based on balance in an outline, a method for semi-automatically generating an alternative outline is applied to one textbook. The textbook with both its original and its alternative outline is availbale in hypertext, and subjects who were asked to evaluate this hypertext noted that the alternative outline would help readers compare concepts in the textbook
- Source
- Journal of documentation. 48(1992) no.1, S.20-44
-
Chen, C.; Rada, R.; Zeb, A.: ¬An extended fisheye view browser for collaborative writing (1994)
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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
- Source
- International journal of human-computer studies. 40(1994) no.5, S.859-878
-
Rada, R.: ¬The GALEN dream (1992)
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- Abstract
- Outlines the origin, needs and principles of GALEN, the Generalized Architecture for Languages, Encyclopedias, and Nomenclatures as applicable to medicine. Elaborates short-term and long-term plans of GALEN to cope with its development. Gives stages indicationg at each what should be achieved and by when and how much funding will be required
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Rada, R.; Murphy, C.: Searching verses browsing in hypertext (1992)
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- Abstract
- Attemps to elaborate the relationships among tasks, user types, and tools for hypertext. A computer system was built for automatically converting books into hypertext and one book converts into Emaccs-Info, Guide, HyperTies, and a variant of SuperBook, called MaxiBook. Compares the performance of 3 classes of users - expers, novices and trainees - with different tasks on these different delivery vehicles, the tasks involving one search question and one browse question
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Chen, C.; Rada, R.: ¬A conceptual model for supporting collaborative authoring and use (1994)
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- Abstract
- This paper discusses some problems encountered in hypermedia-based collaboration and reuse, and presents a conceptual framework to resolve these problems. Three suggestions are made based on the discussion: (1) extra organizational structures are necessary in shared hypermedia to support collaborative interactions; (2) an abstract schema is a key to capture the dynamic nature of the shared hypermedia; (3) an integration of the schema evolution approach and the workflow approach is recommended for an open system hypermedia teamwork support. The whole authoring environment is divided into several component spaces with particular respect to the Dexter Hypertext Reference Model. Not only can this separation reduce the overall complexitiy of working within such an environment, but it also conforms more closely with human cognitive needs in collaborative authoring and reuse activities
