Active distributed framework for adaptive hypermedia

Dattolo, Antonina; Loia, Vincenzo

doi:10.1006/ijhc.1996.0114

Cited by 10 publications

(2 citation statements)

References 37 publications

(39 reference statements)

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“…One reason is that they confirm earlier findings that navigational metrics account for a significant degree of variance in measures of hypertext comprehension. Given the robust character of this association, and the ready availability of real-time path-based data in electronic reading environments, it seems likely that the metrics used in this study can make significant contributions to user models that will certainly be important elements in adaptive hypermedia systems [2,3]. A second reason these results are important is that they lend still greater credibility to the broader theoretical framework used to derive these metrics and, as pointed out in a previous paper [5], this framework provides a basis for a more systematic and objective analysis of reader navigation than has been possible before.…”

Section: Discussionmentioning

confidence: 98%

Navigational correlates of comprehension in hypertext

McEneaney

2000

Proceedings of the Eleventh ACM on Hypertext and Hypermedia

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Despite a substantial literature on problems related to user navigation, we know remarkably little about the relationship between navigational strategies and successful use of hypertext. Revealing the complex interactions of navigational decision making and comprehension, however, will require objective, reliable, and empirically significant navigational metrics that go beyond the largely informal and indirect measures that have traditionally been used. The purpose of this paper is to describe a study that replicates and extends earlier work that defines and validates two objective navigational metrics [5]. Results of this study confirm the empirical significance of these metrics, support the reliability of their relationship to hypertext comprehension, and provide indirect support for a model of reading comprehension that postulates greater demands on higher-level processing in hypertext compared to traditional print.

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Section: Discussionmentioning

confidence: 98%

Navigational correlates of comprehension in hypertext

McEneaney

2000

Proceedings of the Eleventh ACM on Hypertext and Hypermedia

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“…The actor choice is due to the necessity to handle a simple, essential model of distributed computing, in order to highlight, as much as possible, the most important aspects of data and communication abstraction at the basis of a computational architecture rather than exploring new models of human reasoning. Using an extended actor-model, we have described, in a formal way, the details of our architecture; using a concurrent extension of CLOS, different prototypes have been realised [20,41,42]. This practice allowed us to learn much on the high-level distributed concurrent design methodology and to stabilise our model.…”

Section: Discussionmentioning

confidence: 99%

Distributed Information and Control in a Concurrent Hypermedia-Oriented Architecture

Dattolo

Loia

2000

Int. J. Soft. Eng. Knowl. Eng.

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The market for parallel and distributed computing systems keeps growing. Technological advances in processor power, networking, telecommunication and multimedia are stimulating the development of applications requiring parallel and distributed computing. An important research problem in this area is the need to find a robust bridge between the decentralisation of knowledge sources in information-based systems and the distribution of computational power. Consequently, the attention of the research community has been directed towards high-level, concurrent, distributed programming. This work proposes a new hypermedia framework based on the metaphor of the actor model. The storage and run-time layers are represented entirely as communities of independent actors that cooperate in order to accomplish common goals, such as version management or user adaptivity. These goals involve fundamental and complex hypermedia issues, which, thanks to the distribution of tasks, are treated in an efficient and simple way. Keywords: Distributed hypermedia design, open hypermedia systems, configuration management, adaptive hypermedia systems, object-oriented concurrent design, actorbased models. Int. J. Soft. Eng. Knowl. Eng. 2000.10:345-369. Downloaded from www.worldscientific.com by MONASH UNIVERSITY on 02/05/15. For personal use only. Distributed Information and Control in a Concurrent Hypermedia-Oriented Architecture 347 actor, myactor, according to this form: ( Def myactor {inherit-from-this-class} (acquaintance list) [communication list] )An actor is described by specifying three elements: its superclass, its data part and its script part, respectively put between braces, parentheses and brackets. In particular, the communication list is a sequence of scripts which can be executed by myactor. The communication between a sender and one or more receivers is accomplished by the "send" command types:• send allows an actor to send a point-to-point message;• send-multicast allows an actor to send multicasting messages on the net;• send-now-multicast is similar to the previous send-multicast, but it requires an "acknowledge" message from the receiver actors.A general form of the send construct is the following:send − type (script-name argument-list) to destination-list where send − type . . . to is one of the send commands; script-name argument-list determines the script (with its arguments, if any) that the destination actors trigger once they have received the message, while destination-list, introduced by the keyword to , identifies the actor(s) to which the message is addressed. The Storage Layer ModelThe storage layer model constitutes the structure of the hypermedia as provided by its author. The main purpose of this layer is to maintain the persistent objects, the collection of which defines the hypermedia in terms of dynamic internal mechanisms. The storage layer is organised in two levels:• The first level, named Structural Level, contains atomic nodes (named Hy-pActors) and links (named HypLinks). • The second level is named...

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The Importance of modeling metadata for Hyperbook

Hakki

Advances in Systems, Computing Sciences and Software Engineering

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Active distributed framework for adaptive hypermedia

Cited by 10 publications

References 37 publications

Navigational correlates of comprehension in hypertext

Navigational correlates of comprehension in hypertext

Distributed Information and Control in a Concurrent Hypermedia-Oriented Architecture

The Importance of modeling metadata for Hyperbook

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