Diversity of structures and adaptive methods on an evolutionary hypermedia system

Abstract

SEM-HP is a model for the development of evolutionary and adaptive hypermedia systems by means of: a development process that consists in iterative and evolutionary phases; a layered architecture that captures each phase in subsystems divided into two levels of abstraction (system and metasystem); and an author tool that implements the model. The paper focuses on the capability of adaptation of the hypermedia systems developed according to the SEM-HP model, in particular, the learning subsystem that is in charge of performing the user adaptation. SEM-HP offers two important contributions: supporting the process of evolution of the development of adaptive hypermedia systems, ensuring easy, flexible and consistent maintenance; and the orientation support is that inherent to the navigational structure itself.

Evolutionary authoring tool for adaptive hypermedia with multimodal navigation

“…Consequently, the author of the AHS must always initiate the evolution; although some modifications can be suggested by the system itself (e.g. delete an unnecessary conceptual relation), which is able to analyze its usage through the creation of transition matrixes (Medina-Medina et al 2005). After that, the system ensures global consistency, performing additional changes in an automatic mode.…”

“…of the available items and 4) the preferences indicated by the user regarding the items and the length of the route. To generate the route, the system uses a search tree (Medina-Medina et al 2005) constructed from the knowledge and update rules defined in the current CS L . In the search tree, the nodes represent knowledge states, the arcs represent visits to items and the weight of the arc takes into account user preferences.…”

An author tool based on SEM-HP for the creation and evolution of adaptive hypermedia systems

“…SEM-HP allows for many adaptation methods [1], including guidance and adaptive presentation and navigation [9,10]. For now, JSEM-HP implements some of those adaptive techniques, including personalized views (the system choses the most suitable CSP ), map adaptation (the conceptual structure is used for navigation and it is adapted to the user ), annotation (the user knowledge is annotated so he is aware of how his knowledge increases), and link hiding and disabling (the items the user is not ready to understand are partially hidden and disabled).…”

“…Nevertheless, the user knows that the disabled items are available and will become accessible when he gains enough knowledge. If the user is interested in a specific set of items, he can set them as interesting, and the system will mark the items he needs to visit so the interesting items become accessible [9].…”

“…In this paper we present a tool based on the SEM-HP model [6,9] that allows the development of semantic, adaptive and evolutionary hypermedia systems. It takes into account the evolution of the hypermedia system order to assure that it is done properly, and it also addresses the disorientation and cognitive overhead problems by applying several adaptive techniques.…”