Vaninha Vieira

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In times where users need to process an ever increasing amount of information to perform more complex tasks in less time, the introduction of context in computer systems is becoming a necessity. However, building a context-sensitive system entails more work in comparison to traditional systems development: in the former, one must care for context-related(More)
Context-aware mobile applications gain more and more influence on our daily life. Since mobile devices are equipped with various sensors to detect their environment, it is possible to receive and process information from beyond application and device borders. Within the development, these context-aware applications have to be verified to assure that they do(More)
Context-Sensitive Systems (CSS) demand that designers consider new aspects and challenges in comparison to traditional applications. In a preliminary experiment, we observed that developers have difficulties when including the concept of context in their applications. This paper presents a CSS Design Process, which details the main activities for context(More)
A context-sensitive groupware uses information about a group and its participants' context in order to provide useful information and services to improve group work. A relevant issue when designing Context-Sensitive Systems (CSS) is how to represent contextual information and the system's behavior. This paper presents a Context Metamodel and shows(More)
An important issue in groupware is how to improve interaction and collaboration among participants. Through the analysis of the context a user is in or the context that surrounds an interaction, groupware systems can provide users with useful information in that situation. A relevant issue when using context is how to represent context information.(More)
Transportation systems deal with dynamic and sometimes inconstant scenarios, which could involve events like traffic jams or accidents. Intelligent Transportation Systems (ITS) should be projected in a way that their behavior changes according to the real world that can be pictured surrounding it. Context is what allows the understanding of this dynamicity(More)
Awareness is an essential requirement in collaborative activities. This paper presents Ariane, a generic and reusable awareness infrastructure, independent of a specific application or DBMS. Ariane improves the availability of awareness information to different cooperative applications by monitoring the application persistence mechanism. A prototype of(More)
Evaluating the usability of smartphone applications is crucial for their success, so developers can learn how to adapt them considering the dynamicity of mobile scenarios. The HCI community recommends considering different requirements when evaluating those applications, such as quantitative data (metrics), subjective evaluation (users’ impressions) and(More)