David Mérida

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In this work we present a tool for Adaptive Support for Collaborative and Individual Learning (ASCIL). Taking as a base the fact that learning is not solely an individual nor collaborative process, we have come to the conclusion that it is an integrated activity which requires integral support. We have therefore applied two previously developed systems,(More)
To implement an efficient adaptation of content in the network, different variables can be analysed that involve the types of users, the devices used by customers to gain access, the types of access, the state of the network and the current load on the server. The increasing use of hypermedia objects for creating content and the fact that the variables(More)
In this paper, a network laboratory for distance learning of basic concepts in IP networking is presented. Through a web interface, students can choose various configurations of a real private network (number of routers and subnetworks, use of IPv4/IPv6, etc.), and learn about them using Linux network commands. The utilization of the virtual laboratory and(More)
This paper presents a tool, for the analysis and regeneration of web contents, implemented through XML and Java. At the moment, the web content delivery from server to clients is carried out without taking into account clients’ characteristics. Heterogeneous and diverse characteristics, such as user’s preferences, different capacities of the client’s(More)
The SHAAD model (Adaptable, Adaptive and Dynamic Hypermedia System) allows adapting the web content delivered to the user based on his/her preferences and characteristics, and the features and limitations of the device used to interact with the system. In this work we use CC/PP (Composite Capabilities/Preference Profiles) to describe the characteristics of(More)
Free volume voids in lipid bilayers can be measured by positron annihilation lifetime spectroscopy (PALS). This technique has been applied, together with differential scanning calorimetry and molecular dynamics (MD) simulations, to study the effects of cholesterol (Chol) and ceramide (Cer) on free volume voids in sphingomyelin (SM) or(More)
The heterogeneity problem (in terms of different types of access devices, network bandwidth, preferences/characteristics of the user, etc.) has become a major problem for the Internet. Different alternatives have been developed to allow universal access to any type of content. Adaptive Hypermedia Systems (AHS) have emerged as a solution for this. In(More)
Positron annihilation lifetime spectroscopy (PALS) provides a direct measurement of the free volume void sizes in polymers and biological systems. This free volume is critical in explaining and understanding physical and mechanical properties of polymers. Moreover, PALS has been recently proposed as a potential tool in detecting cancer at early stages,(More)
In this paper we present an implementation using XML and Java (XSHAAD) based on a modular architecture of SHAAD to support a web-based Adaptive Hypermedia System. This architecture considers the hypermedia adaptation along three different “adaptivity dimensions”: user characteristics, technology (the network and the user’s terminal), and user interaction.(More)
The explosive growth of Internet during the last years has been reflected in the ever-increasing amount of the diversity and heterogeneity of user preferences, types and features of devices and access networks. Usually the heterogeneity in the context of the users which request Web contents is not taken into account by the servers that deliver them implying(More)