Professional Service

Member, Program Committee, 2nd International Symposium on Pervasive Displays (PerDis 2013)
Member, Program Committee, 24th International Conference on Computational Linguistics (COLING 2012)
Member, Program Committee, 1st International Symposium on Pervasive Displays
Publicity Co-Chair and Paper & Notes Associate Chair, ACM Conference on Computer-Supported Cooperative Work (CSCW 2012)
Forum Editor, Social Media, ACM interactions (2011-2012)
Member, Program Committee, 13th International Conference on Human-Computer Interaction with Mobile Devices and Services (MobileHCI 2011)
Associate Chair, Papers & Notes Committee, ACM Conference on Human Factors in Computer Systems (CHI 2011)
Associate Chair, Papers & Notes Committee, ACM Conference on Computer-Supported Cooperative Work (CSCW 2011)
Member, UbiComp Steering Committee, 2009-present; Member, 2009-present
Chair / Co-Chair, UbiComp Steering Committee, 2003-2009; Member, 2009-present
Faculty panelist, Doctoral Colloquium, 11th International Conference on Ubiquitous Computing (UbiComp 2009)
Co-Chair, Program Committee, 10th International Conference on Ubiquitous Computing (UbiComp 2008)
Member, Program Committee, 7th International Conference on Pervasive Computing (Pervasive 2008)
Member, Program Committee, 9th International Conference on Ubiquitous Computing (UbiComp 2007)
Associate Chair, Papers Committee, ACM Conference on Human Factors in Computer Systems (CHI 2008)
Associate Chair, Notes Committee, ACM Conference on Human Factors in Computer Systems (CHI 2007)
Member, Venture Breakfast Committee, Northwest Entrepreneur Network (NWEN), 2004-2006
Industrial Liaison, ACM 2004 Conference on Computer Supported Cooperative Work (CSCW 2004)
General Chair, 5th International Conference on Ubiquitous Computing (UbiComp 2003)
Conference Co-Chair, ACM 2002 Conference on Computer Supported Cooperative Work (CSCW 2002)
Co-Chair, Technical Notes, International Conference on Ubiquitous Computing (UbiComp 2001)
Member, Program Committee, Fifth Message Understanding Conference (MUC 5), 1993
Reviewer: ACM Conference on Human Factors in Computer Systems (CHI 2000-2013)
International Conference on Ubiquitous Computing (UbiComp 2000-2012)
International Conference on Pervasive Computing (Pervasive 2003-2012)
ACM Conference on User Interface Systems and Technology (UIST 2003, 2011-2012)
ACM Conference on Designing Interactive Systems (DIS 2012)
International Conference on Tangible, Embedded and Embodied Interation (TEI 2012)
IEEE International Symposium on Wearable Computers (ISWC 2000, ISWC 2003)
Applied Artificial Intelligence Journal (Special issue on AI and Mobile Systems, 2003)
IEEE Pervasive Computing (several years)
Communications of the ACM (2002)
IEEE Internet Computing (2001)
Journal of Personal and Ubiquitous Technologies (2001)
ACM Conference on User Interface Systems and Technology (UIST 2000)
Machine Learning Journal: Special Issue on Natural Language Learning (1999)
Conference on Computational Linguistics (COLING 94)