An Agent-Centric Approach to Implicit Human-Computer Interaction

......................................................................................... 3 Acknowledgements......................................................................... 4 List of Figures ................................................................................ 9 Introduction ................................................................................. 10 1.1 Computers in everyday life ................................................................10 1.2 Fundamental computing approaches.................................................10 1.3 Era of Ubiquitous, Wearable & Mobile Computers........................... 11 1.4 Motivation..........................................................................................12 1.5 Summary of Contributions.................................................................13 1.6 Thesis Outline ....................................................................................14 Approaches to Human-Computer Interaction (HCI) ................. 15 2.1 Current Interactions are Explicit .......................................................15 2.2 Towards Implicit HCI ........................................................................16 2.2.1 Implicit Input ................................................................................................ 17 2.2.2 Context Aware Computing ........................................................................... 17 2.2.3 Implicit Output.............................................................................................. 18 2.2.4 Invisibility & Transparency .......................................................................... 18 2.2.5 Usability........................................................................................................ 19 2.2.6 User Intent..................................................................................................... 19 2.2.7 Providing feedback ....................................................................................... 19 2.2.8 Explicit Input ................................................................................................ 20 2.3 User interfaces for Implicit HCI ........................................................20 2.3.1 Tangible User Interfaces ............................................................................... 21 2.3.2 Embodied User Interfaces............................................................................. 23 2.3.3 Multi-modal Interaction ................................................................................ 23 2.4 Summary ............................................................................................24 An Agent-Centric Approach to Implicit HCI .............................. 25 3.1 Physical & Virtual Environments.......................................................25 3.2 Characteristics of Future Computing Environments .........................26 3.3 Agent-Centric Model .........................................................................27 3.3.1 Location Agent.............................................................................................. 28 3.3.2 Personal Agent .............................................................................................. 29 3.3.3 Decentralization & Distributed Computing .................................................. 30 3.3.4 Uneven Conditioning .................................................................................... 32 3.3.5 Client Thickness............................................................................................ 32