An Ontology-based Conceptual Model for Composing Context-Aware Applications

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Conceptual Model. for Composing. Context-Aware ... R.A. Computer Technology Institute, DAISy group. Patras, Greece. 7/9/2004 ... Context & plug/synapse model ...
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Title: An Ontology-based Conceptual Model for Composing Context-Aware Applications 1 An Ontology-basedConceptual Model for ComposingContext-Aware Applications
  • Eleni Christopoulou, Christos Goumopoulos,
  • Ioannis Zaharakis Achilles Kameas
  • R.A. Computer Technology Institute, DAISy group
  • Patras, Greece
  • 2 Context-aware UbiComp applications
  • Ambient environments
  • dynamic and heterogeneous
  • Context
  • physical, environmental and personal information
  • Decouple UbiComp application composition from context acquisition, representation and management
  • 3 Plug/synapse model 1/2
  • High-level conceptual model
  • artefacts are components of UbiComp applications
  • plugs make visible the artefacts properties, capabilities and services to people and to other artefacts
  • synapses are associations between two compatible plugs
  • Users can compose UbiComp applications simply by creating associations between the artefacts
  • 4 Plug/synapse model 2/2
  • Application developers point of view
  • plugs are context-providers that offer high-level abstractions for accessing context
  • synapses represent users preferences and needs and the emerging behavior of a UbiComp application
  • Service infrastructures perspective
  • plugs are reusable building blocks for context rendering
  • synapses determine the context of operation for each artefact
  • 5 Context plug/synapse model
  • A context-provider component (plug) reads input sensor data and outputs
  • low level context information time, temperature, etc.
  • high-level context information activity, state, mood, etc.
  • An artefact from its own experience and use has
  • low level context information acquired from its own sensors
  • high level context information - interpretation of its low level context information
  • An artefact gets context information through synapses from other artefacts plugs
  • information from a third-person experience
  • 6 The study UbiComp application
  • Open/Close plug ? eBooks state low level context
  • Switch On/Off plug ? eLamps state low level context
  • eLamps ability to provide light high level context
  • e.g. lights color, selected luminosity
  • 7 GAS Ontology 8 Enhancing GAS Ontology
  • Mixed communities of artefacts and plants
  • Incorporation of new concepts
  • ePlant, eEntity
  • Need of a context management and reasoning process
  • definition of a plants state and behaviour
  • 9 Our vision 1/2
  • The combination and cooperation of artefacts ? the continuous formation of new societies
  • provide services not existing initially in the individuals
  • The formation of such emergent societies depends on
  • space and time
  • knowledge about previous local interactions, previous configured teams, successfully achieved goals or possible failures
  • Need to model and embed
  • social memory
  • enhanced context memory
  • shared experiences
  • 10 Our vision 2/2
  • Evolving multi-dimensional ontologies
  • non-functional descriptions, rules and constraints of application
  • dynamic behaviour and interactions
  • An open and universally available and accessible core ontology
  • evolved into higher goal, application and context specific one during the society life-time
  • Ontologies of specific application domains can be proprietary
  • 11 Fin.
  • Thank you for your attention!
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