Foreword; Acknowledgements; Abstract; Table of Content; List of Figures; List of Tables; List of Abbreviations; Part I: Fundamentals; 1 Introduction; 1.1 Motivation; 1.2 Research Goals and Central Research Questions; 1.3 Structure of Thesis; 2 Related Work; 2.1 CSCW and Information Infrastructures; 2.2 The Public and its Formation; 2.2.1 Differentiation of Publics; 2.2.2 Publics and Communities; 2.2.3 Publics and Technology; 2.3 Application Domain of Crisis Management; 2.4 Emergent Citizen Groups in Crisis Management; 2.4.1 Official and Volunteer-based Crisis Management

2.4.2 Citizen-based Crisis Management and Emergent Citizen Groups2.4.3 Official Crisis Management and Emergent Citizen Groups; 2.5 IT Support for Citizens during Crisis Management; 2.6 Research Gap; 3 Research Approach; 3.1 Design Case Studies as Methodological Framework; 3.2 Research Field; Part II: Collected Findings; 4 Researching Public's Formation through Modern ICT Infrastructures (JCSCW); 4.1 Introduction; 4.2 Theoretical Background: Publics, Communities and CSCW; 4.2.1 The Public and its Formation; 4.2.2 Communities as Cohesive Groups of Publics

4.2.3 The Interplay between Publics, Communities and Technologies4.2.4 The Impact of Technology and Design on Publics; 4.3 Research Gap and Approach; 4.4 Potential Methodologies for Detecting Shared Issues as Early Indicators for Publics; 4.4.1 Physically Gathering Contextual Information with Mobile Technology; 4.4.2 Virtually Gathering Citizen-generated Content via Social Media; 4.5 Towards an Operational Model of the Transformation from Publics into Communities; 4.5.1 The Internal Perspective on the Formation of Publics and Communities

4.5.2 The External Perspective of the Formation of Publics and Communities4.6 Practical Implications for Researching the Formation of Publics and their Transformation; 4.6.1 Timelines of Publics vs. Timelines of Research; 4.6.2 Research Goals and Data Collection; 4.6.3 Immersiveness and Distance of Research; 4.6.4 Ethical, Legal and Social Issues; 4.6.5 Framing the Research Work on the Formation of Publics and Communities; 4.7 Conclusion; 5 Examining Individual's Activities 'in the Wild' (PUC); 5.1 Introduction; 5.2 Related Work; 5.2.1 Usage and Usability Evaluations

5.2.2 Self-Reporting Methods5.2.3 Probe Methods; 5.2.4 Device-Integrated Studying of Work- and Leisure-Related Smartphone Use; 5.2.5 Research on Spheres of Activity in CSCW and Groupware Systems; 5.3 Empirical Study: Capturing and Researching People's Behavior in the Wild; 5.3.1 Methodology; 5.3.2 Results I: Capturing In Situ Behavior from the Mobile Device User's Perspective; 5.3.3 Results II: Researching In Situ Behavior from the Researcher's Perspective; 5.4 Concept of an Approach for Detecting and Assigning Activities to the Context