Presented to The Portuguese Group of Software Architects (GASP) in 2009-04-14

1. Context-Aware Computing Concepts & Architecture

2. “ Identification of place lies as a generative core of architecture. Place is to architecture as meaning is to language” Prof. Sharad Atre College of Architecture & Environmental Design

4. Concepts

8. Context-Awareness

10. “ An example of a piece of relevant context information is the most common question posed when communicating on mobile phones: ‘Where are you?’” Louise Barhuus Department of Design and Use of Information Technology The IT University of Copenhagen

15. Video Pervasive Computing

18. Three Levels of Service

20. Architecture

21. “ The most profound technologies are those that disappear. They weave themselves into the fabric of everyday life until they are undistinguishable from it.” Mark Weiser Chief Scientist at Xerox PARC

23. Services Tomorrow

24. Context-Aware Applications Stack Physical Raw data Semantic Inference Application Physical or virtual sensor Data processing object Semantic processing object Inference object Application User’s GPS GPS measurements User’s latitude, longitude Services nearby the user? Notify user, execute service Components Layers Example

25. Service Inference Example Service Hotel Dish hotel service xsd:double Location xsd:double Rooms Facilities Dinning facility SnackBar Swimming pool DoubleRoom SingleRoom hotel:offers loc:latitude loc:longitude Restaurant owls:subClassOf Hotel ontology Location ontology OWL-S ontology owls:location owls:subClassOf owl:subClassOf owl:subClassOf owl:subClassOf

26. Abstract Layered Architecture for Context-Aware Systems applications storage/management preprocessing/reasoning raw data retrieval sensors Acting Subsystem Thinking Subsystem Sensing Subsystem

29. Video UbiComp Nightmare

32. Context-Aware Computing Concepts & Architecture