Here you can find a list of my  professional activities,

committee memberships & invited talks:

PC member    Ubicomp 2011, Beijing / China

Talk                HCI Design for Trustworthy Organic Computing

PC member    ICMI 2011, Alicante, Spain

Talk                University of Duisburg-Essen, Germany

Talk                SMART, Calgary, Canada

Talk                University of Calgary, Canada

PC member    MobileHCI 2011, Stockholm, Sweden

Talk                WARM Workshop 2011, Graz Austria

PC member    8th International Symposium on Location-Based Services, Vienna, Austria

PC member    Geoinformatik 2011, Münster, Germany

PC member    AGILE 2011, Utrecht, Netherlands

Organizer       of the CHI 2011 Workshop on Next Generation of HCI and Education, USA

Chair               Interactive Tabletops and Surfaces (ITS) 2010, Saarbrücken, Germany

Organizer       of LocWeb2010, Tokyo, Japan

PC member    IUI 2011, Palo Alto, USA

PC member    MUM 2010, Limassol, Cyprus

Talk                Deutsche Gesellschaft für Kartographie, Bonn, Germany

Talk                Wirtschaftsinformatik, Würzburg, Germany

Organizer       of the Pervasive 2010 Workshop Ubiprojection, Helsinki, Finnland

PC member    for AIGILE 2010, Guimarães, Portugal

Talk                WARM Workshop 2010, Graz Austria

Talk                Stadtverwaltung Köln, Cologne, Germany

Talk                Droidcon 2009, Berlin, Germany

Organizer       of the CHI 2010 Workshop on Next Generation of HCI and Education, USA

Demo chair     for ITS 2009, Banff, Canada

Talk                Faculty of Computer Science, Magdeburg

Talk                Medieninformatik, Augsburg, Germany

PC member    for MIRW 2009, Bonn, Germany

PC member    for SLIDE 2009, Linz, Austria

PC member    for AIGILE 2009, Hannover, Germany

Talk                Geoinformatik 2009, Osnabrück, Germany

Talk                5. GIS-AT 2009, Postdam, Germany

Organizer       of LocWeb2009, Boston, USA

Talk                WARM Workshop 2009, Graz, Austria

Talk                WAMS 2008, Ylivieska, Finland

Talk                Advanced Navigation 2008, Berlin, Germany

Organizer       of BYO Multi-Touch Bootcamp with IEEE Tabletops 2008, Amsterdam, Netherlands

Talk                Institute for Cartography & Geoinformatics, Hannover, Germany

Organizer       of the First International Workshop TIPUGG 2008, Salt Lake City, USA

PC member    for Fun & Games 2008, Eindhoven, Netherlands

Member          of the ACM SIGCHI

PC member    for LocWeb 2008, Peking, China

Talk                WARM Workshop 2008, Graz, Austria

Talk                Advanced Navigation 2007, Berlin, Germany

Organizer       of the 1st Workshop on Multi-Touch Surfaces, Münster, Germany

Demo             AAG Spatial Technology Gallery, San Francisco, USA

Talk                Yahoo Research, Berkeley, USA

Talk                Ricoh Innovation, Palo Alto, USA

Member          of the Deutscher Alpenverein