Search (153 results, page 1 of 8)

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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

Discusses 3 levels of requirements for testing hypertext applications: the validation of the information contained in each node of the hypertext; the verification of the correctness of the implementation of the links between the nodes; and the evaluation of the system structure for testing the usability. For each level of the requirements, proposes test adequacy criteria and gives algorithms for generating adequate test suites of minimum cost. Based on the analysis, develops a software testing tool to support the efficient management of a hypertext testing process

Source

Information and software technology. 39(1997) no.4, S.225-234

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Abstract

A materialized hypertext view is a hypertext containing data coming from a database and whose pages are stored in files. A Web site presenting data coming from a database is an example of such a view, where the hypertext pages are HTML files. Even if the most popular approach to the generation of such sites is the virtual one, there is also a rationale for a materialized apporach. This paper deals with the maintenance issues required by these derived hypertext to enforce consistency between page content and database state

Source

The World Wide Web and Databases: International Workshop WebDB'98, Valencia, Spain, March 27-28, 1998, Selected papers. Eds.: P. Atzeni et al

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Content

Trägerin des VFI-Dissertationspreises 2014: "Überzeugende gründliche linguistische und quantitative Analyse eines im Information Retrieval bisher wenig beachteten Textelementes anhand eines eigens erstellten grossen Hypertextkorpus, einschliesslich der Evaluation selbsterstellter Auflösungsregeln für die Nutzung in künftigen IR-Systemen.".

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Abstract

Describes WorldWideWeb (WWW) software developed at CERN to provide hypertext links to the resources on the Internet telecommunications network. Outlines how to access WWW, itd features and approach to handling of multiple document types on multiplatform servers and to multiple clients

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Abstract

The ease of linking and hopping from one text to another that we associate today with the World Wide Web was implemented in a different context prior to the Web. The creation of "hypertext" has a long and interesting history prior to the Web, as this article demonstrates. At the time it was issued, the HyperCard software application was expected to be the foundation of a widely-used new means of information organization. We can see now that the key ideas of hypertext were present in HyperCard, without the ease of use of subsequent World Wide Web features.

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Date

22. 2.1997 19:40:31

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Abstract

Elektronische Produktion, Verbreitung und Rezeption von Texten - deren integrative Wechselbeziehungen eingeschlossen - verändern unausweichlich unsere Forschungs-, Lernund Arbeitsbedingungen. In diesem Wandel braucht es Orientierung, Strategien und Kompetenzen. Dieser Band bietet sie in interdisziplinärer Vielfalt. Teil 1 befaßt sich mit Wissen und Wissenschaft. Er spannt den Bogen der Medientheorie von der Antike bis ins 21. Jahrhundert und bietet einen konstruktivistischen Ansatz für das Wissensmanagement. Textsortenkonventionen und Hypertext sind ebenso Schwerpunkte wie empiriegestützte Guidelines und innovative Werkzeuge für das wissenschaftliche Arbeiten. Teil 2 ist Lernumgebungen gewidmet. Reflexionen zur Theorie von hypermedialem Lernen und Kognition werden ergänzt durch ein Produktionssystem für interaktive Software. Eine Felduntersuchungvergleicht Varianten kooperativen Schreibens, ein Schreibdidaktik-Projekt vermittelt zwischen Studium und Beruf. Teil 3 vereint unter dem Titel «Domänen der Praxis» empirische Erhebungen zur Text(re)produktion und elektronischen Kommunikation im Berufsalltag, die Konzeption eines Werkzeugs für die Übersetzungsarbeit und den Ausblick auf kulturspezifische Web-Sites in der Wirtschaft.

Content

Aus dem Inhalt: Peter Handler: Das E zum Text. Einführung - Eva-Maria Jakobs: Textproduktion im 21. Jahrhundert - Christoph Sauer: Vom «Alten» im «Neuen». Zur Bestimmung der Integration früherer Medienentwicklungen in multimediale Textgestaltungen - Eva Martha Eckkrammer: Textsortenkonventionen im Medienwechsel - Guido Ipsen: Pragmatik des Hypertextes. Linguistische Aspekte WWW-gebundener Informationsmedien als designtechnisches Instrument - Rolf Todesco: MailTack - Individuelles Wissensmanagement - Carsten Hausdorf/Herbert Stoyan: ScientiFix - ein modellbasiertes Werkzeug zur integrierten Rezeption und Produktion wissenschaftlicher Texte - Dagmar Knorr: Von der Dissertationsschrift zur Publikation oder: Wie wird aus einem Manuskript ein Buch? -Jörg Zumbach/Peter Reimann: Hypermediales Lernen und Kognition. Anforderungen an Lernende und Gestaltende - Bernd Gaede: Konventionalisierung der Gestaltung multimedialer Software durch Automatisierung. Ein Produktionssystem für interaktive Lernsoftware - Helmut Felix Friedrich/Aemilian Hron/Sigmar-Olaf Tergan/Thomas Jechle: Unterstützung kooperativen Schreibens in virtuellen Lernumgebungen - Katrin Lehnen/Kirsten Schindler: Schreiben zwischen Studium und Beruf. Zur didaktischen Vermittlung domänetispezifischer Schreibanforderungen in der Hochschulausbildung - Daniel Perrin: «Wir tun uns hier mal um den Inhalt herummogeln». Strategien computergestützter Textreproduktion beim Nachrichtenschreiben - Horst Silberhom: Das Projekt ForeignSGML. Übersetzungsunterstützung bei technischer Dokumentation - Karl-Heinz Pogner/Anne-Marie Soderberg: Organisationsinterne `E-Mail an alle'-Kommunikation: Informationsübertragung oder Kommunikationsraum? - Marc Rittberger/Frank Zimmermann: Wirtschaftliche und kommunikative Aspekte eines internen Kommunikationsforums in einem Unternehmen der Medienindustrie - Rogier Crijns: Elemente textuellen Appellierens in der digitalen Produktwerbung. Textgestaltung und kulturspezifische Appellformen in Webvertising.

Date

12. 8.2012 18:05:22

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Abstract

The subject of a recent MA thesis in library and information studies is the development of a prototype scholars workstation for presentation of materials, in a hypermedia format, from the Dickens House Museum Library, London. Type and number of materials is provided. Basic hypertext features and authoring attributes of the hypermedia software used, Guide 3.0 for Windows, are described and the time factors inherent in research, planning and development of such a project are emphasized. Elements of screen design are described and presentation of textual and visual materials are provided with accompanying illustrations of navigational pathways. Testing of the prototype is described, including the test sample, the questionnaire and evaluation form, and brief conclusions

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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

Source

Information and software technology. 37(1995) no.7, S.339-350

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Abstract

Describes the Bell Atlantic DocuSource System, a hypertext informaton system designed to assist in the preparation, editing and delivery of text and images online. It will enable the conversion of volumes of print documents into interactice electronic libraries. Describes its functionality and possible uses

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Abstract

Discusses the varieties of link information on the WWW, how the Web differs from conventional hypertext, and how the links can be exploited to build useful applications. Specific applications presented as part of the ParaSite system find individuals' homepages, new locations of moved pages and unindexed information

Date

1. 8.1996 22:08:06

Footnote

Contribution to a special issue of papers from the 6th International World Wide Web conference, held 7-11 Apr 1997, Santa Clara, California

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Source

Mediale Klassengesellschaft? Politische und soziale Folgen der Medienentwicklung. Hrsg.: M. Jäckel a.a

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Abstract

The World Wide Web (WWW) is one of the newest tools available to assist in the navigation of the Internet. As with other client/server network tools such as Gopher and WAIS, developments with the Web are in a dynamic state of change. Basically, WWW is an effort to organize information on the Internet plus local information into a set of hypertext documents; a person navigates the network by moving from one document to another via a set of hypertext links

Source

Online libraries and microcomputers. 11(1993) no.1, S.1-4

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Abstract

Explores the strengths and limitations of hypertext for the online presentation of thesauri used in information retrieval. Examines the ability of hypertext to support each of 3 common types of thesaurus display: graphic, alphabetical, and hierarchical. Presents a design for a hypertext-based hierarchical display that addresses many inadequacies of printed hierarchical displays. Ullustrates how the design might be implemented using a commercially available hypertext system. Considers issues related to the implementation and evaluation of hypertext-based thesauri

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Abstract

Outlines the progress of HyperLib, research which began in 1993 to develop a hypertext interface to the online catalogue and other databases at the University of Antwerp. A human factors oriented design methodology was adopted. A user survey was carried out. The project has focused on development of electronic guides and manual and interfaces to access an academic bibliography database and the UDC subject classification scheme. Evaluation is being carried out in 1995

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Abstract

Presents a 3 facet adaptive authoring model for online hypermedia information systems. It provides spatial reconfiguration of the presentation objects based on activation frequency, information content customization based on author specified criteria, and hypergraphic network optimization based on usage. Discusses the theory underlying the model, its architecture and hypermedia structure, and provides a preliminary quantitative measure and evaluation of its impact on authoring time, as well as study time

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Abstract

Natural language generation techniques can be used to dynamically produce hypertext dynamic catalogues on the Web, resulting in DYNAMIC HYPERTEXT. A dynamic hypertext document can be tailored more precisely to a particular user's needs and background, thus helping the user to search more effectively. Describes the automatic generation of WWW documents and illustrates with 2 implemented systems

Date

1. 8.1996 22:08:06

Footnote

Contribution to a special issue devoted to the Proceedings of the 7th International World Wide Web Conference, held 14-18 April 1998, Brisbane, Australia

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Footnote

Rez. in: nfd 54(2003) H.8, S.497 (T. Mandl): "Gesetze der digitalen Anarchie - Hyperlinks im Internet entstehen als Ergebnis sozialer Prozesse und können auch als formaler Graph im Sinne der Mathematik interpretiert werden. Die Thematik Hyperlinks ist im Information Retrieval höchst aktuell, da Suchmaschinen die Link-Struktur bei der Berechnung ihrer Ergebnisse berücksichtigen. Algorithmen zur Bestimmung des "guten Rufs" einer Seite wie etwa PageRank von Google gewichten eine Seite höher, wenn viele links auf sie verweisen. Barabási erklärt dem Leser seines Buches darüber hinaus noch, wie es zu solchen Phänomenen kommt. Soziale Prozesse im Netz wirken so, dass bereits bekannte Seiten mit größerer Wahrscheinlichkeit auch wieder weitere Links oder neue Besucher anziehen. Barabási ist Physiker an der Notre-Dame University und ihm fehlt ebenso wie Huberman die informationswissenschaftliche Perspektive. Er fragt also kaum, wie kann das Wissen über Netzwerke zu Verbesserungen in Informationssystemen führen, die Benutzerbedürfnisse besser erfüllen. Gleichwohl lohnt sich die Lektüre auch für Informationswissenschaftler. Barabäsi stellt die aktuelle Forschung zur Netzwerkstruktur des Internets auf einfache Weise fast ohne Zugeständnisse an Aktualität und Komplexität dar. Wie Huberman verzichtet auch er weitgehend auf Formeln und andere Formalismen. Der in Ungarn geborene Barabási lässt darüber hinaus keine Anekdote aus, sei es über die Begründer der Graphen-Theorie, im peer-review abgelehnte Beiträge und persönliche Begegnungen mit anderen Forschern. Barabási beginnt mit einfachen Netzwerkstrukturen und schreitet didaktisch über internet-ähnliche Netzwerke weiter zu Anwendungen und praktischen Beispielen aus unterschiedlichsten Disziplinen. Er schafft mit seinem Buch "Linked" unter anderem Links zwischen der ungarischen Literatur, dem I-Love-You Computer-Virus, der Verbreitung von Aids, den Theorien Einsteins, den Aufsichtsräten der wichtigsten amerikanischen Firmen, dem Al-Qaeda-Netzwerk und der Struktur und der Funktion biologischer Zellen. Zu Beginn seines Buches berichtet Barabási von sogenannten kleinen Welten, in denen viele Objekte über wenige Verbindungen zusammenhängen. Ein Blick in den eigenen größeren Bekanntenkreis mag bestätigen, dass viele Menschen über wenige Schritte zwischen Bekannten erreichbar sind. Sowohl Barabäsi als auch Huberman gehen auf die Geschichte des ersten sozialwissenschaftlichen Experiments zu diesem Thema ein, das in den 1960er Jahren versuchte, die Anzahl von Schritten zwischen gemeinsamen Bekannten zu bestimmen, welche vom Mittleren Westen der USA an die Ostküste führt. Die genauere Struktur solcher Systeme, in denen manche Knoten weitaus mehr Beziehungen zu anderen eingehen als der Durchschnitt, führt hin zum Internet. Im Web lässt sich keineswegs immer ein Pfad zwischen zwei Knoten finden, wie noch vor wenigen Jahren vermutet wurde. Die durchschnittliche Entfernung war damals noch mit 19 Klicks berechnet worden. Vielmehr herrscht eine differenziertere Struktur, die Barabási vorstellt und in der zahlreiche Seiten in Sackgassen führen. Huberman wie Barabási diskutieren auch negative Aspekte des Internet. Während Huberman die Wartezeiten und Staus bei Downloads analysiert, bespricht Barabási die rasante Verbreitung von ComputerViren und weist auf die Grundlagen für diese Gefährdung hin. Das vorletzte Kapitel widmen übrigens beide Autoren den Märkten im Internet. Spätestens hier werden die wirtschaftlichen Aspekte von Netzwerken deutlich. Beide Titel führen den Leser in die neue Forschung zur Struktur des Internet als Netzwerk und sind leicht lesbar. Beides sind wissenschaftliche Bücher, wenden sich aber auch an den interessierten Laien. Das Buch von Barabási ist etwas aktueller, plauderhafter, länger, umfassender und etwas populärwissenschaftlicher."