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Introduction (Definition of Mobile Computing (Who: the user, What: the…

- - - - Mobile devices used different IP addresses
      - Selective broadcast, central services, home base, forwarding pointers
    - - Information request depends on the location of the device
    - - Connections should be dynamically trasferred to servers that are geographically closer
- - - - Lack of abstractions for acquiring/using context
      - Lack of design principles
      - Distributed context sensing
    - - Feedback: how do I know what's going on?
      - Control: how do I change what's going on?
      - Privacy: who gets this information?
      - Overload: is this another way to spam me?
    - - Proactive triggering: e.g. performing some interaction based on environmental perceptions
      - Streamlining interaction: reducing irrelevant information; e.g. travel guide for current location
      - Memories for past events: contextual retrieval, e.g. based on spatial or feature-based cues
      - Reminders for future context: e.g. tagging details regarding current context for future access
      - Optimising patterns of behaviours: e.g. changing interface based on situation (from screen to text-to-voice)
      - Sharing experiences: social networking based on shared contexts
    - - Passive
        
        New context is presented to the user to inform them of the change
        
        User can then explicitly determine if the use of an application should change
        
        Examples
        
        Changing information regarding environment (weather meters)
        
        Context-based tagging (eg by camera)
      - Active
        
        Behaviour of the applications change automatically
        
        Examples
        
        Task filtering (e.g. information filtering, based on current wireless network speed)
        
        Context-based task activation (e.g routing)
        
        Content adaptation (e.g. for people with disability)
- - - - Electrical signal on a temperature gauge should be converted into a Celsius value
      - Absolute geo-location position should be converted into an address identification of a building