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To enable context-awareness for many distributed mobile applications, an architecture is needed that supports the collecting of disseminated context attributes. After the structuring and storing of context, the interpretation and adaptation with reference to the current context and changes of context must be applied. These tasks are common to a large set of context-aware applications and can be centralized...
We present and discuss a context aware publish subscribe system. This allows for efficient communication between different components within distributed environments. For this we introduce context-awareness into the subscription handling. Our middleware allows to attach context properties to event subscriptions. Only if those properties are satisfied by the current state of the world, the events are...
Hand-based gesture interaction in smart environments provides a comfortable and discreet way to interact with the environment. However, most of the available approaches are not robust enough against inaccurately performed gestures and sensor noise in such environments. This usually leads to a decreased gesture recognition rate. Thus, the overall interaction experience suffers when performed in smart...
In this paper we describe our methodology for building context-aware applications. It supports a systematic definition, conception and development of the context-aware features of an application along the different phases of a software development process. Its application has helped us in the discussion and conception of these features in project teams with non-technical domain experts. A context...
We present PeerSense, a system that provides meaningful co-presence information which serves as an enabler for various applications that require user's current social proximity information, for example contextual photo-sharing. Unlike traditional approaches for inferring co-presence, PeerSense is both privacy-preserving and easy-to-use.
Large-scale context-aware pervasive environments are dealing with context information of every user for every domain supported. They have to represent every user's personal situation that typically consists of overlapping contexts while caring for the privacy of their users. The contexts are not necessarily all the same for different users that are part of a specific situation. Furthermore, they are...
Current autonomic vehicles in outdoor scenarios perform mobility operations with walking speed to ensure safety. For a faster mobility of autonomous vehicles, concrete knowledge of the environment is needed. This will be achieved through a dynamic context model based on sensor data with uncertainties from the environment. These uncertainties arise through existential uncertainty, consistency, and...
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