Search (56 results, page 1 of 3)

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Abstract

At the time being, there is a lot of different systems claiming to be either multimedia, hypermedia, or supporting collaborative, cooperative work. In this paper, a first attempt to clearify the notions of these concepts is tried. Multimedia content, hyperstructure organization and cooperative access will be identified as different features of an intelligent document. These features will be discussed under formal, information technology and implementation aspects

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Abstract

Discussions and presentations dealt with attempts to clarify the different concepts in multimedia, object-oriented methods for multimedia, multimedia from psychological perspectives, synchronization problems in multimedia, ccoperative work using multimedia, multimedia interface builders, and so on. There was also a small exhibition presenting 4 different systems ranging from commercial products to research prototypes. The book is divided into 8 parts, on fundamentals, interaction, synchronization, demonstration presentations, cooperative work, information systems, multimedia systems and conclusions

Content

Enthält u.a. die folgenden Beiträge: HORNUNG, C. u. A. SANTOS: A proposal for a reference model for cooperative hypermedia systems; HERZNER, W. u. E. HOCEVAR: CDAM: Compound Document Access and Management; MARMOLIN, H.: Multimedia from the perspectives of psychology; FROHLICH, D.M.: The design space of interfaces; TOOK, R.K.: Out of the window: a multi-medium; KIRSTE, T. u. W. Hübner: An open hypermedia system for multimedia applications; GOBLE, C. et al.: The Manchester Multimedia Information System; RHINER, M. u. P. STUCKI: Database rewuirements for multimedia applications; BELL, D. u. P. JOHNSON: Support for the authors of multimedia tutorials; WARD, P. u. F. ARSHAD: Interactive multimedia information systems for education

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Abstract

Presents a conceptual model for hypermedia systems that, among ohter features, supports versioning, permits exploring and managing alternate configurations, maintains document histories, supports cooperative work and provides automatic propagation of version changes. In general, the model was designed to minimize the cognitive overhead imposed on the user by version manipulation. Presents a generic layered architecture for hypermedia systems with 4 major interfaces and shows how it matches the conceptual model

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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

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Imprint

Darmstadt : Technische Hochschule, Fachgebiet Datenverwaltungssysteme II

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Abstract

The Konstanz-Hypertext-System (KHS) is an open hypertext system which employs internal and external information sources to satisfy the user's need for information when navigating through a hypertext. E-mail, Gopher and online databases are available in KHS as external information sources. The main tasks which must be carried out during an online search are analysis of the question, selection of the databases, formulation of a search strategy, online search, feedback and the presentation of the results. All of these tasks are supported within KHS, but special emphasis is given to database selection. Introduces a new method for selecting relevant online databases with KHS using the database descriptions from several hosts

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Abstract

Librarians find themselves today in a lively period of the evolution of user interfaces to online information. Most of the newer interfaces incorporate graphics, colour and mouse-supported searching to make intiation for the novics user easier and all searching more productive. Describes the University of Delaware's development of DELCAT MacPAC, a HyperCard-based front-end to the university's OPAC, adapted from Cornell University's MacPAC. The focus is on Delaware's customisation of MacPAC for its environment, including the support of remote users, and the testing, use, and distribution of the product

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Abstract

The h-journal is both a networked information tool and a new, evolving genre of electronic documents that aims to support the information work of practitioners. Discusses the features and application of the h-journal that were needed for information work in health sciences reference librarianship

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RSWK

World wide web / Hypertext / Aufsatzsammlung (213)

Subject

World wide web / Hypertext / Aufsatzsammlung (213)

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Abstract

The design and development of web-based educational systems for people with special abilities have recently attracted the attention of the research community. However, although a number of systems that claim to meet accessibility needs and preferences are proposed, most of them are typically supported by hypermedia and multimedia educational content that is specially designed for the user targeted group. Such approaches prevent their user groups (both learners and their tutors) from accessing other available resources. Therefore, it is important to be able to built generic e-learning systems that would allow the reuse of existing learning resources in different accessibility demanding applications. To this end, in this article we propose a methodology for defining an accessibility application profile that captures the accessibility properties of learning objects in a standard form and we examine its application to the IEEE Learning Object Metadata (LOM) standard.

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Abstract

This research is focused on the continuation of the Hypertext Map prototype implementation - MHTX, proposed by Lima, (2004), with the general objective of transforming the MHTX into a semantic content management product facilitating navigation in context supported by customizable software that is easy to use, through high end desktop/web interfaces that sustain the operation of its functions. Besides, these studies aim, in the long run, to achieve the simplification of the information organization, access and recovery processes in digital libraries, making archive management by authors, content managers and information professionals possible.

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Abstract

Navigating through hyperlinks within a Web site to look for information from one of its Web pages without the support of a site map can be inefficient and ineffective. Although the content of a Web site is usually organized with an inherent structure like a topic hierarchy, which is a directed tree rooted at a Web site's homepage whose vertices and edges correspond to Web pages and hyperlinks, such a topic hierarchy is not always available to the user. In this work, we studied the problem of automatic generation of Web sites' topic hierarchies. We modeled a Web site's link structure as a weighted directed graph and proposed methods for estimating edge weights based on eight types of features and three learning algorithms, namely decision trees, naïve Bayes classifiers, and logistic regression. Three graph algorithms, namely breadth-first search, shortest-path search, and directed minimum-spanning tree, were adapted to generate the topic hierarchy based on the graph model. We have tested the model and algorithms on real Web sites. It is found that the directed minimum-spanning tree algorithm with the decision tree as the weight learning algorithm achieves the highest performance with an average accuracy of 91.9%.

Date

22. 3.2009 12:51:47

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Abstract

This paper introduces the notion of context-aware mobile hypermedia. Context awareness means to take the users' context such as location, time, objective, community relations, etc., into account when browsing, searching, annotating, and linking. Attributes constituting the context of the user may be sensed automatically and/or be provided by the user directly. When mobile, the user may obtain context-aware hypermedia support on a variety of small and medium sized computing platforms such as mobile phones, PDAs, tablet PCs, and laptops. This paper introduces the HyCon (HyperContext) framework with an architecture for context-aware hypermedia. The architecture includes interfaces for a sensor tier encapsulating relevant sensors and represents the hypermedia objects in structures based on the XLink and RDF standards. A prototype called the HyConExplorer created with the framework is presented, and it is illustrated how the classical hypermedia features such as browsing, searching, annotating, linking, and collaboration are supported in context-aware hypermedia. Among the features of the HyConExplorer are real-time location-based searches via Google collecting hits within a specified nimbus around the user's GPS position. Finally, the use of scenarios for and evaluation of the use of the HyConExplorer in public school projects are discussed.

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Abstract

Producing an effective hyperdocument requires considerable work and a surprising diversity of skills. In addition to being good writers, the authors should have abilities in design, user-interfaces, testing, structuring and maintenance. This paper will analyse the work that goes into producing production-quality hyperdocuments and what the cost/benefits are. It is assumed that the reader, though not necessarily a hypertext expert, knows what hypertext is

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Abstract

While hypertext is often claimed to be a tool that especially aids associative thinking, intellectual "work" involves more than association. So, questions arise about the usefulness of hypertext tools in the more disciplined aspects of scholarly and argumentative writing. Examining the phases of scholarly writing reveals that different hypertext tools can aid different phases of intellectual work in ways other than associative thinking. Spatial hypertext is relevant at all phases, while page-and-link hypertext is more appropriate to some phases than others.

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Abstract

This paper introduces the notion of physical hypermedia, addressing the problem of organizing material in mixed digital and physical environments. Based on empirical studies, we propose concepts for collectional actions and meta-data actions, and present prototypes combining principles from augmented reality and hypermedia to support organization of mixtures of digital and physical materials. Our prototype of a physical hypermedia system is running on an augmented architect's desk and digital walls utilizing Radio Frequency Identifier (RFID) tags as well as visual tags tracked by cameras. It allows users to tag physical materials, and have these tracked by readers (antennas) that may become pervasive in our work environments. In the physical hypermedia system, we work with three categories of RFID tags: simple object tags, collectional tags, and tooltags invoking operations such as grouping and linking of physical material. In addition, we utilize visual ARToolKit tags for linking and navigating 3D models on a physical desk. Our primary application domain is architecture and design, and so we discuss the use of augmented collectional artifacts primarily for this domain.

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Abstract

Hypertext for multi-media and full-text documents is rapidly developed on all fronts. For bibliographic information retrieval the applications are promising but pose several difficulties. Describes work conducted at the School of Library and Information Science at Univ. of Western Ontario the objective of which is to add the capability of a browsing search to an existing OPAC through the use of Windowed Hypertext Interface for Zippy Retrieval and Display (WHIZRD) software. Discusses the underlying retrieval capabilities of the system. Examines design problems and solutions and outlines future enhancements

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Abstract

Offers an introduction to hypertext for librarians. Defines hypertext. Discusses the advantages of hypertext according to the creation and tracing of references; flexibility of nodes and links; cognition augmentation and collaborative work. Examines hypertext disadvantages and problems by considering its static nature; conceptual fragmentation; disorientation; cognitive overhead; presentation rhetoric; cost and intellectual security. Discusses library applications of hypertext covering information retrieval; online databases; citation indexing; OPACs and electronic books. Considers expert systems with hypertext features and hypertext with artificial intelligence

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Abstract

Examines research literature on educational hypermedia design and divides the literature in 2 groups, 1 advocating no author control of the user's path through the material, the other advocating varying degrees of control. The no control researchers' work is determined to be lacking in audience and goals analyses as well as results evaluation while the researchers advocating control lack grounding in theory

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Abstract

While the potential of hypertext as an information presentation medium is undeniable, its acceptance by users will be determined largely by its usability. Highlights 4 issues of relevance: reading from screens as opposed to reading from paper; reader behaviour; interface design variables such as display size and manipulation facilities; and user navigation. Existing research is reviewed and implications for the design of hypertext systems are discussed. Suggestions for future work are presented.