Search (79 results, page 1 of 4)

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Abstract

The C(K)onstance Hypertext System (KHS) is an elaborated example of an open hypertext system. Open hypertext systems combine heterogeneous resources and different hypertext applications such as e-mail, text and image hypertexts with access to online databases or other information resources. These hypertexts, to which heterogeneous users have access, grow steadily in size. This paper takes an object-oriented approach and proposes a rigorous typing of hypertext objects to overcome the problems of open hypertext. The advantage of this typing is shown on an e-mail hypertext as a special application of the KHS system. KHS is written in Smalltalk and is being developed on UNIX-machines

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Abstract

The C(K)onstance Hypertext system (KHS) is an elaborated example of an open hypertext system. Open hypertext systems combine heterogeneous resources and different hypertext applications such as email, text and image hypertexts with access to online data bases or other information resources. These hypertexts, to which heterogeneous users have access, grow steadily in size. This paper takes an object-oriented approach and proposes a rigorous typing of hypertext objexts to overcome the problems of open hypertext. The advantage of this typing is shown an an e-mail hypertext as a special application of the KHS system. KHS is written in Smalltalk and is being developed an UNIX-machines.

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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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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

Describes Open Document Architecture (ODA) an international standard for representation and interchange of multimedia documents which aims to support document interchange between document processing systems provided by different vendors of different platforms. Gives an overview of its basic principles describing its document structures, document content, document profile and interchange formats, and discusses future developments

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Abstract

Describes Microcosm an open hypermedia system developed at the Univ. of Southampton. In Microcosm no information concerning links is held in documents; all link information is held in external linkbases which contain details about the source and destination anchors of the links. Microcosm is also composed of independent components which communicate by passing messages. As working in such an open environment reduces system response work is being carried out in to the use of Microcosm as a hypertext onto other delivery systems. As an intermediate stage HyTime based document structures which describe Microcosm hypertext, especially linkbases are currently being produced. A process which will convert a Microcosm dataset into this representation and then further translation programs to convert the representation to run on other hypermedia delivery systems is being defined

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Abstract

Proposes a conceptual model to examine hypertext information presentation effects on decision making performance when compared with traditional sequentional information presentation and access. Considers which combination of task knowledge type (superficial, and causal) and information presentation styles (sequential, hypertext) yield the best decision making performance. This is achieved by comparing performance effect of hypertext and sequential information presentation when applied to superficial and causal type of knowledge required for the task. The 2 surrogates used for measuring the outcome of the performance effects are decision time and secision accuracy

Date

24.10.1996 19:57:22

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Abstract

Considers why the use of hypermedia has not been more widely accepted and applied in practice, given that it is such a powerful information handling technique and it has been commercially available for 5 years. Argues that hypermedia is not sufficiently open or transparent to users, enabling them to find relevant information relatively easily and at a high level of sophistication. Suggests that a higher degree of transparency can be obtained by taking into account a variety of issues which can best be accomodated by the designation information ecology

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Abstract

Discusses 3 methods of migrating existing non hypermedia applications to provide hypermedia services. Presents a brief review of hypermedia data models and provides an overview of 2 methods of retrofitting an existing application, both of which are based on traditional hypermedia architectures. Offers a new mechanism for retrofitting existing applications that results in an open and integrated application environment. Discusses a model of the mechanism, implementation details, and procedure for converting application to utilize the mechanism. Describes some concerns and constraints that guided the research, limitations of the mechniasm and future research

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Abstract

When the Web was invented, it was touted as a novel nonlinear medium for the written word. No longer would we be constrained by linear presentations! Hyperlinks would allow us to jump haphazardly from page to page, chapter to chapter, idea to idea! Texts would no longer need to run from beginning to end! This is misleading. A printed book is also multidimensional and potentially nonlinear. We can open it to any page, from any other page, for any reason. We can open several books at once. In fact, what makes a book special is its combination of linear structure (the order of the words) and nonlinear physicality (the bound papers). This linear/nonlinear duality is enhanced further by the index, which maps linearly sequenced pages in a nonlinear, informationally ordered structure (architecture). In truth, the online environment is crippled by an absence of linear structure. Imagine selecting a hard cover book, tearing off the covers, ripping pages into small pieces, and throwing them in a box. That box is like a computer file system, and the paper scraps are Web documents. Only one scrap can be retrieved from the box at a time, and it must be replaced before another can be accessed. Page numbers are meaningless. Global context is destroyed. And without page numbers or context, what happens to the index?

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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

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Abstract

The Canto hypertext data model is chracterized by a hierarchical scheme mechanism that allows a predetermined, open-ended scheme to be embedded in the hyperdocument. Canto uses 2 types of nodes: concept nodes, which provide organizational structure, and information nodes, which contain text and other data. Describes the model, explains how it reduces user disorientation and discuss the most important features. Presents a formal specification of Canto's functionally and discusses the scheme definition language that a hypertext system designer uses to establish a hypertext scheme. Presents the scheme manipulation language which allows for alterations to the scheme and data. Describes a test conducted to determine the usability of hypertext systems built using Canto and discusses related work

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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

Large hypertext systems have been many benefits but can be difficult to build and use. To help overcome these obstacles, a method under development at Hewlett-Packard assists authors in creating usable hypertext. A Wizard of Oz experiment, to see what users liked and disliked, showed the need for a set of hypertext construction rules to ensure usability. Following these rules, and with computer assistance, authors are expected to do a tasks analysis of users' activities, to identify critical objects and create content nodes for them, to create links between nodes within clearly defined and cognitively justified limits, and to conduct usability tests on the resulting hypertext volume. The authoring system described has been developed for the HP help system, which has been adopted as the common help delivery system for developers of Common Open Systems Environment on Unix-like platforms

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Abstract

Shows the possibilities that exist to create a basic hypertext interface for a thesaurus management system. The project has been built in 3 stages: conceptual data model for the thesaurus; development of the management tools, that is, the thesaurus management system; and the hypertext interfaces. The system has been developed on Windows and combines the power of relational database management systems and the navigational flexibility of Guide, a hypertext shell. presents 2 interface models. Concludes that hypertext interfaces improve management, and open a new path for knowledge organization research

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Abstract

Purpose - The paper aims to review Deleuze and Guttari's concept of the rhizome as a model for information organisation. Design/methodology/approach - This is a critical review of selected literature. Findings - The rhizome concept is a promising model for understanding hyperlinked information services. It may be of practical value, particularly if it can be integrated with more traditional forms of information organisation. More research, conceptual and practical, is needed before this can be achieved. Research limitations/implications - The literature review is not comprehensive, and the conclusions are open-ended. Originality/value - This is the only paper to review the rhizome concept in this way.

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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

In this study we explored the use of logfiles as a window into the process of hypermedia navigation. Although there is a growing body of research addressing theoretical and design issues related to open-ended, non-directive technologies such as hypermedia, relatively few studies have attempted to explain navigational performance. 66 undergraduate students used a multidimensional, computer-based kiosk that could be explored in a nonlinear fashion to find information in response to one of two information retrieval tasks (simple or complex). Cluster analysis was used to generate performance profiles derived from navigational data captured in log files. Analyses of within cluster performance profiles, combined with external validation criteria, led to the classification of 4 different types of navigational performance (models users, disenchanted volunteers, feature explorers, and cyber cartographers). These characterizations were consistent with information retrieval users and the external criteria (self-efficacy, perceived utility, and interest). For example, individual who appeared to fake the time to learn the layout of the kiosk also had the highest self-efficacy, while those who used the help screen and watched the most movies had the lowest self-efficacy. Results also demonstrated an interaction between various individual navigational profiles and type information retrieval task