296 Germanakos & Mourlas Copyright 2006, Idea
298 Germanakos & Mourlas Copyright 2006, Idea Group Inc. Copying or distributing in print or electronic forms without written permission of Idea Group Inc. is prohibited. multimedia-based services as supplied by the provider (without at this point being further manipulated or altered). Back-End Layer (Content Provider) This is the last layer of the architecture and is directly connected to the middle layer. It contains transition mechanisms and the databases of Web-based multimedia content or multimedia-based services as supplied by the provider without been through any further manipulation or alteration. The proposed three-layer architecture for adaptation and personalization of Web-based multimedia content will allow users to receive the Web-based multimedia content or multimedia-based service which they access in an adapted style according to their preferences, increasing in that way efficiency and effectiveness of use. Implementation Considerations So far, the functionality and interrelation of three-layer achitecture components that provide adapted and personalized Web-based content have been extensively investigated This section will focus on the concepts and parameters that take part in the construction of a comprehensive user profile, and how these could be used in order to collect all the relevant information. As it has already been mentioned, a lot of research has been done for the implementation of the traditional user profiling. Many adaptation and personalization techniques have been developed, and common semantic libraries have been set up that give basically specific and ad-hoc solutions.. However, to our knowledge, implementations that incorporate visual attention, cognitive, and emotional processing parameters to the user profile have not been reported as yet, and such parameters would definitely lead to a comprehensive accumulation of user perceptual preference characteristics and hence, provide users with more sustainable personalized content. Therefore, main emphasis in the following section is given to the construction of the new comprehensive user profiling, incorporating these user perceptual preference characteristics mentioned above. Further examining the middle layer of the proposed architecture and the Perceptual User Requirements element of the New User Profiling component, we can see that the User Perceptual Preference Characteristics could be described as a continuous mental processing starting with the perception of an object in the users attentional visual field (stimulus) and going through a number of cognitive, learning, and emotional processes giving the actual response to that stimulus. This is depicted in Figure 5. These processes formulate a three-dimensional approach to the problem, as depicted in Figure 6. The three dimensions created are the Learning Styles, the Visual and Cognitive Processing, and the Emotional Processing dimensions. The User Learning Processing dimension is a selection of the most appropriate and technologically feasible learning styles, such as Witkin s Field-Dependent and Field- Independent and Kolb s Learning Styles, being in a position to identify how users
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