WHAT IS CONTEXT-AWARE BEHAVIOR? Current Computing Trends: From the Virtual to the Physical Context, Context Awareness, and SituationsWhen Systems Become Context Aware An Overview of This Book ReferencesTHE STRUCTURE AND ELEMENTS OF CONTEXT-AWARE PERVASIVE SYSTEMSAnalogiesThe Elements of a Context-Aware Pervasive System An Abstract Architecture Infrastructures, Middleware, and Toolkits Issues of Security, Privacy, and EfficiencySummaryReferencesCONTEXT-AWARE MOBILE SERVICES The Rise of Mobile Services Context for Mobile Device UsersLocation-Based Services Ambient Services From Ambient Services to Place-Based E-Communities Enhancing Context-Aware Mobile Services With Mobile Code and Policy: The MHS Example Enhancing Context-Aware Mobile Services With Multiagent Technology: The Example of Proximity-Based Reverse AuctionsSummary and Further Developments Acknowledgment ReferencesCONTEXT-AWARE ARTIFACTS Aware ObjectsArchitectural Design Space for a Context-Aware Artifact Context-Aware Mobile Phones: An IllustrationSummaryReferencesCONTEXT-AWARE MOBILE SOFTWARE AGENTS FOR INTERACTION WITH WEB SERVICES IN MOBILE ENVIRONMENTSAgents: Mobile and Intelligent Scenarios A Brief Review of Agent Platforms for Ubiquitous ComputingCALMA Architecture Prototype Implementation and EvaluationSummaryAcknowledgmentsReferencesCONTEXT-AWARE ADDRESSING AND COMMUNICATION FOR PEOPLE, THINGS, AND SOFTWARE AGENTSContext-Aware Communication for PeopleContext-Aware Addressing and Commanding for Objects Context-Aware Communication for Software Agents Summary and ConclusionReferencesCONTEXT-AWARE SENSOR NETWORKSContext-Aware Sensors: The Concept A Framework for Context-Aware Sensors Implementation and Application Scenario SummaryAcknowledgment ReferencesCONTEXT-AWARE SECURITYTraditional Security Issues and Models Context-Aware Security Systems From Context-Aware Security to Context-Aware SafetySummaryReferencesCONTEXT AWARENESS AND MIRROR-WORLD MODELS Gelernter's Mirror Worlds NexusVirtual Worlds, Virtual EnvironmentsDigital CitiesAware Spaces: Smart Environments and Smart SpacesMirror Worlds: Context and Ontologies SummaryReferencesCONSTRUCTING CONTEXT-AWARE PERVASIVE SYSTEMS: DECLARATIVE APPROACHES AND DESIGN PATTERNS Representing Situations Five Other Ways to Represent a Meeting Metaprogramming With Situation Programs: Examples Another Declarative ApproachToward Design Patterns for Context-Aware Applications: Situation PatternsSummaryAcknowledgment ReferencesA FUTURE WITH AWARE SYSTEMS The Emerging Future: Taking Awareness for GrantedScalability and Usability Final Words INDEX.