Thèse de doctorat : Università della Svizzera italiana, 2009 ; 2009INFO002.
Performance and high-availability are the crucial factors in the development of nowadays distributed database systems. Both of these challenges are commonly addressed by means of the same technique, database replication. The overall throughput of the system is increased by leveraging parallel computation on different sites, and in case of replica failures, availability is improved by...
|
Thèse de doctorat : Université de Fribourg, 2008.
|
Thèse de doctorat : Université de Fribourg, 2006 ; no 1528.
This dissertation studies the heterogeneity problem of pervasive computing system from the viewpoint of an infrastructure aiming to provide a service-oriented application model. From Distributed System passing through mobile computing, pervasive computing is presented as a step forward in ubiquitous availability of services and proliferation of interacting autonomous entities. To better...
|
Thèse de doctorat : Université de Fribourg, 2004 ; no 1458.
Distributed virtual worlds are multi-user applications running on several computers connected by a network. They go beyond the traditional document based World Wide Web since multiple users interact within a shared space and are aware of each other. Distance learning, telemedicine, adventure games, virtual shopping malls, virtual conferencing, virtual museums, virtual e-banking are just some...
|
This thesis presents the concept of general argumentation systems, a framework for representing uncertain knowledge using information algebras and information systems as well as probability algebras. Argumentation systems are a generalization of assumption-based systems and propositional argumentation systems and can deal with very general formalisms. We show also that an argumentation system...
|
Thèse de doctorat : Université de Fribourg, 2002 ; no 1393.
This dissertation addresses three fundamental problems, which have to be handled in application domains like ubiquitous computing and Web services. The three problems heterogeneity, static configuration, and dynamic configuration are not only considered to persist during the near future but to increase, as similar application domains will emerge. The heterogeneity problem is defined and examples...
|
Thèse de doctorat : Université de Fribourg, 1999 ; no 1272.
This thesis introduces a methodological approach to artificial agent design. In an attempt to solve the symbol grounding problem of artificial intelligence, a new theoretical perspective on the agent-environment relation is explored and experimentation is led to motivate this methodology. From the original idea that in order to ground an agent in an environment, the agent’s representation...
|
Thèse de doctorat : Université de Fribourg, 2002 ; no 1392.
The future multi-layer optical networks based on wavelength division multiplexing technology will lead to the creation of new value-added optical services, which is bound to transform the traditional passive transport network into an active and intelligent transport layer. The successful deployment of these complex networking services and the possibility of subjecting them to a dynamic control,...
|
Thèse de doctorat : Université de Fribourg, 2001 ; N° 1353.
This thesis investigates the optimization of automated high-density storage systems at design stage and in control logic development. In modern storage technology, automated high-density storage systems offer a space saving alternative to traditional storage rack systems. They comprise several floors subdivided into parallel storage aisles and linking cross-aisles. Pallet movements are...
|
Thèse de doctorat : Università della Svizzera italiana, 2003.
Web application development still needs to employ effective methods to accommodate some distinctive aspects of the requirements analysis process: capturing high-level communication goals, considering several user profiles and stakeholders, defining hypermedia-specific requirements (concerning navigation, content, information structure and presentation aspects), and reusing requirements for an...
|