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Mobile networks and particularly UMTS bring to the service
provision context a new concept, known as Virtual Home Environment
(VHE), that advocates services totally independent of network and
terminal technologies. The VHE concept gains particular importance
in the provision of next generation services, characterized not
only by location based features, but also by context-aware
features, multimedia contents and user mobility. The work presented
here moves in two main directions. Firstly, the definition of an
architectural framework for the materialization of the VHE,
decoupling all the aspects that are VHE specific from the basic
service functionality, in order to facilitate the service creation
process. Secondly, a proposal to solve the problem of the
adaptation of multimedia services in mobile contexts. The book
combines context-awareness techniques with user interface modeling
to dynamically adapt telecommunications services to user resources,
in terms of terminal and network conditions. The solution is mainly
characterized by the approach used for resolving the existing
dependencies among user interface variables, which is based on the
constraints theory.
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