Search (42 results, page 1 of 3)

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Abstract

Compilation of overhead sheets of papers given at the workshop. Describes standards for multimedia and hypermedia

Footnote

Part of a special issue featuring papers from the workshop on hypermedia and hypertext standards held in Amsterdam, Netherlands, 22-23 April 1993

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Content

Enthält u.a.: WELSCH, L.A.: Multimedia and hypermedia: model and framework. - BRYAN, M.: Standards for text and hypermedia processing. - POPHAM, M.G.: Use of SGML and HyTime in UK universities. - SCHELLER, A.: The Open Document Architecture (ODA) and its HyperODA extensions. - FROMONT, J.: State-of-the-art regarding the various standards for contents related to text, still images, sound and video. - BROEKMAN, H.J.D.: Effective communication with interactive media

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Date

1. 8.1996 22:08:06

Source

Computer networks and ISDN systems. 29(1997) no.8, S.1205-1215

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Date

1. 8.1996 22:08:06

Source

Computer networks and ISDN systems. 30(1998) nos.1/7, S.666-668

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Date

1. 8.1996 22:08:06

Source

Computer networks and ISDN systems. 28(1996) nos.7/11, S.1105-1112

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Abstract

Visual documents - motion sequences on film, videotape, and digital recordings - constitute a major source of information for the Space Agency, as well as other government and private sector entities. This article describes a method for automatically selecting key frames from visual documents. These frames may in turn be used to represent the total image sequence of visual documents in visual libraries, hypermedia systems, and training guides. The performance of the abstracting algorithm reduces 51 minutes of video sequnces to 134 frames; a reduction of information in the range of 700:1

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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

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Abstract

A new computer-based writing environment is being developed which combines a hypertext 'ideas organizer' with a text editor. Compares 2 algortihms which could be used in such environments for turning networks of notes indicating ideas into linear draft documents. The algorithms are designed to produce a linear ordering of the notes which is acceptable to the writer as a first draft of the document. Reports on experiments to test their effectiveness. Subject were asked to create notes networks which were then linearized by the 2 algorithms. The resulting linearization created by hand, were assessed for textual organization. The experiments indicate that both algorithms produce linearizations which are acceptable as draft texts, that the best first algortihm is marginally superior to the hill climbing one, and that providing information to the algorithms about link types had little effect on their effectiveness. Concludes by describing an implementation of the best first algorithm as part of the Writer's Assistant writing environment

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Abstract

One of the key objectives of knowledge management is to transfer knowledge quickly and efficiently from experts to novices, who are different in terms of the structural properties of domain knowledge or knowledge structure. This study applies experts' semantic networks to hypertext navigation design and examines the potential of the resulting design, i.e., semantic hypertext, in facilitating knowledge structure acquisition and problem solving. Moreover, we argue that the level of sophistication of the knowledge structure acquired by learners is an important mediator influencing the learning outcomes (in this case, problem solving). The research model was empirically tested with a situated experiment involving 80 business professionals. The results of the empirical study provided strong support for the effectiveness of semantic hypertext in transferring knowledge structure and reported a significant full mediating effect of knowledge structure sophistication. Both theoretical and practical implications of this research are discussed.

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Abstract

The emphasis in most hypertext systems is on the navigational methods, rather than on the global document retrieval mechanisms. When a search mechanism is provided, it is often restricted to simple string matching or to the Boolean model (as an alternate method). proposes a retrieval mechanism using Bayesian inference networks. The main contribution of this approach is the automatic construction of this network using the expected mutual information measure to build the inference tree, and using Jaccard's formula to define fixed conditional probability relationships

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Abstract

The convergence of different fields, regrouping computer networks, multimedia, hypertext and new powerful software interfaces bring fresh approaches to the production, cataloguing and access of electronic documents. Hypertext organization brings the possibility of reading the document or navigating in a non-linear fashion. This will fundamentally alter reading, writing and publishing in future generations

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Abstract

Compares the use of 2 adaptive algorithms (genetic algorithms, and neural networks) in clustering hypermedia documents. The clusters allow the user to index into the nodes and find information quickly. The clustering focuses on the user's paths through the hypermedia document and not on the content of the nodes or the structure of the links in the document, thus the clustering reflects the unique relationships each user sees among the nodes. The original hypermedia document remains untouched, and each user has a personalised index into this document

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Abstract

Most successful hypertext systems are small. The texts are either authored by a single person or written to tight standards. Examines the problems of handling large amorphous collections of research type documents with hypertext. Presents a pilot study for the Australian Heritage Commission which safeguards heritage sites that may involve conflicts of ownership and land use. An experimental hyperbase was constructed of plants and plant communities in the forest of Tasmania. Examines issues of scaling up, especially those relating to navigation through a vast hyperbase via routes never followed before. Proposes categories for Logical Information Modules and links

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Abstract

Investigates the effects of context-weks versus context-strong tasks and learning style on the citation frequencies and citation percentages of 4 mental models students perceived to be inherent in a hypermedia learning environment. The 4 mental models were semantic networks, concept maps, frames / scripts and schemata. They were further grouped as linear. In study 1 the search participants could cite as many of the 4 mental models as they chose for each of the target commands, features or tools, in study 2 they were limited to citing only one

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Abstract

Concept mapping has a history of use in many disciplines as a formal or semi formal diagramming technique. Concept maps have an abstract structure as type hypergraphs, and computer support for concept mapping can associate visual attributes with node types to provide an attractive and consistent appearance. Computer support can also provide interactive interfaces allowing arbitrary actions to be associated with nodes such as hypermedia links to other maps and documents. Describes a general concept mapping system that is open architecture for integration with other systems, scriptable to support arbitrary interactions and computations, and customizable to emulate many styles of map. The system supports collaborative development of concept maps across local area and wide area networks, and integrates with WWW in both client helper and server gateway roles. A number of applications are illustrated ranging through education, artificial intelligence, active documents, hypermedia indexing and concurrent engeneering. Concept maps should be regarded as basic components of any hypermedia system, complementing text and images with formal and semi-formal active diagrams

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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.

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Abstract

The Multimedia Information Presentation System (MIPS) will allow end users to browse multimedia information presented in a user friendly and consistent manner. In its most powerful configuration, it will allow the end user to formulate queires which are interpreted, analyzed, and dispatched by the system to heterogeneous distributed external data sources, and to view a coherent and customized presentation of the data retrieved as answers. Data are stored in, or referenced from, a set of hyperdocuments conforming to the ISO standards HyTime and SGML. The hyperdocuments constitute an information web which may be dynamically expanded to accomodate retrieved data. The web navigation structure, structure of information nodes, specification of presentation mechanisms, specification of presentation tools, and data are separable and potentially reusable for different applications, different activities within an application, or different environments. Outlines the intended functionality and the design of MIPS, with particular reference to the structure and function of the hypermedia web and the role of the knowledge base system module in its dynamic expansion

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Abstract

Seit dem ersten internationalen Workshop über Hypertextsysteme 1987 in Chapel Hill hat das Hypertext-Gebiet eine außerordentlich dynamische Entwicklung erfahren. Hypertext-Komponenten sind in eine Vielzahl von Informationssystemen und Benutzungsoberflächen integriert, ohne dass sie - wie z.B. bei Dateisystemen - noch als solche wahrgenommen würden. Das World Wide Web (WWW) hat sich als weltumspannendes Medium etabliert, dessen konsistente Weiterentwicklung durch stets erweiterte Standards von einer eigenen Organisation, dem WWW-Consortium gesteuert wird. Elektronische Bücher kann man auf CD-ROM in fast jeder mittelgroßen Buchhandlung kaufen. Große Firmen setzen auf die Weiterbildung ihrer Mitarbeiter durch virtuelle, oft hypertext-basierte Lehre, für die wiederum eigene Standards-z.B. das Shareable Content Object Reference Model (Storm) - entwickelt werden. Dieser weite Einsatzbereich bringt allerdings auch ein erhebliches methodisches Problem mit sich. Hinter den disparaten Anforderungen der jeweiligen Einsatzgebiete droht eine zusammenhängende Theorie von Hypertext zu verschwinden. Ob eine solche überhaupt zu formulieren ist, ist ohnehin fraglich. Schon eine umfassende Theorie von Text konnte bisher nicht oder nur auf sehr abstraktem Niveau formuliert werden. Die im Zusammenhang mit dem Aufbau und der Nutzung von Hypertexten und Hypertextsystemen auftretenden Fragestellungen sind vielfach interdisziplinärer Natur, die z.T. auch einzelwissenschaftlich mit etwas verengter Perspektive untersucht werden. Die Informatik sieht in Hypertext eine Spezialform multimedialer Systeme, die besonders unter dem Gesichtspunkt der Datenverwaltung, bestehender Kommunikationsstandards und Software-Architekturen zu untersuchen sind. Lerntheorien aus Pädagogik und Psychologie sind die Grundlage für den Aufbau und die Nutzung von Lehrhypertexten. Hyperfiction - hypermediale Belletristik- profitiert von und speist sich aus den Strömungen der gegenwärtigen Literaturtheorie. Hier soll Hypertext vor allem unter informationswissenschaftlichen Fragestellungen behandelt werden. Einer kurzen definitorischen Eingrenzung des Gegenstands folgen texttheoretische Überlegungen zum Hypertext. Sodann wird auf die Informationssuche in Hypertexten und die Gestaltung von Hypertexten eingegangen.

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Abstract

This paper describes part of a university research project which aims to construct a design method involving interactive multimedia products for knowledge acquisition. The purpose of the method is to design truly interactive multimedia products (Vidalenc, 1997), and thus to introduce a new form of writing. This is built up by adopting a constructivist paradigm that is based upon a systemic view and upon a network approach such as proposed by the sociology of translation (Callon, 1986). All our reflections are indeed based on the differentiation between two levels of information: an internal level and a sensitive level (Bouzidi and Vidalenc, 1997). However we have chosen a common model, the object oriented model, which allows us to represent the elements belonging to each level. In order to prove the validity of this proceeding, a prototype is under preparation. It is founded on the transposition of a course, which deals with telecommunications and networks, into a multimedia teaching tool. To be able to build up the prototype, taking into account the usual steps (writing the requirement schedule, choosing the necessary technology, modeling, design, implementation and evaluation), and after that, to be able to measure the conception method, a stage of analysis and assessment of the present course is necessary. The analysis of the course must allow us to identify the conditions of the knowledge transfer and provide components for the requirement schedule of the hypermedia product. This is the main subject of our reflections