In recent years, the number of repositories where publications are listed or can be maintained has multiplied and I haven't managed to update them all with all my publications. My plan is to create one master list and then automatically populate all the other sites with the data I store there. Most likely, this master list will be ORCID but I haven't finalised this yet. In the meantime, you find below a list of publications up until mid-2012 (most with PDF links) as well as links to several sites/repositories.

public repositories of my publications

2012

CAttacking location privacy: exploring human strategies. T. Fechner and C. Kray. (2012) In "Proceedings of the 2012 ACM Conference on Ubiquitous Computing". ACM, New York, NY, USA, 95--98.

CVisual highlighting on public displays. M. Ostkamp and G. Bauer and C. Kray. (2012) In "Proceedings of the 2012 International Symposium on Pervasive Displays". ACM, New York, NY, USA, 2:1--2:6.

PSupporting pilgrims in navigating densely crowded religious sites. F. Hamhoum and C. Kray. (2012) Personal and Ubiquitous Computing (16) , Springer-Verlag, 1013-1023.

2011

CScalable Navigation Support for Crowds: Personalized Guidance via Augmented Signage. F. Hamhoum and C. Kray. (2011) In Egenhofer, Max and Giudice, Nicholas and Moratz, Reinhard and Worboys, Michael (eds.): "Spatial Information Theory". Springer Berlin Heidelberg, 40-56.

2010

Ethics and Persuasive Technology: An Exploratory Study in the Context of Healthy Living. R. Page and C. Kray. (2010) In "NIMD'10: First International Workshop on Nudge and Influence Through Mobile Devices at Mobile HCI'10".

Opportunistic peer-to-peer pedestrian positioning system. J. Wagner and C. Kray. (2010) In "Poster at Pervasive 2010, Helsinki, Finland".

Evaluating Natural User Interfaces for Public Displays in the Wild. (Position Paper) J. Müller and D. Michaelis and C. Kray. (2010) In "Workshop on Natural User Interfaces: the prospect and challenge of touch and gestural computing at CHI 2010".

CDesign by physical composition for complex tangible user interfaces. T. Doering and B. Pfleging and C. Kray and A. Schmidt. (2010) In "CHI EA '10: Proceedings of the 28th of the international conference extended abstracts on Human factors in computing systems". ACM, New York, NY, USA, 3541--3546.

CUser-defined gestures for connecting mobile phones, public displays, and tabletops. C. Kray and D. Nesbitt and J. Dawson and M. Rohs. (2010) In "MobileHCI '10: Proceedings of the 12th international conference on Human computer interaction with mobile devices and services". ACM, New York, NY, USA, 239--248.

Assessing the feasibility of opportunistic peer-to-peer positioning for pedestrians. J. Wagner and C. Kray. (2010) In "Ubicomp in the Large: Collaborative Sensing and Collective Phenomena, Workshop at Pervasive 2010".

2009

JBridging the gap between the Kodak and the Flickr generations: A novel interaction technique for collocated photo sharing C. Kray and M. Rohs and J. Hook and S. Kratz (2009) International Journal of Human-Computer Studies, vol. 67, issue 12, pp. 1060-1072. PDF.

JSupporting Device Discovery and Spontaneous Interaction with Spatial References. H. Gellersen, C. Fischer, D. Guinard, R. Gostner, G. Kortuem, C. Kray, E. Rukzio, and S. Streng. (2009) Personal and Ubiquitous Computing, (13) 4, 255-264.

CExploring the use of landmarks for navigation support in natural environments. C. Snowdon and C. Kray. (2009) In: “Proceedings of Mobile HCI 2009”. ACM Press, New York, NY, USA, article no. 13.

Evaluating Ubiquitous Systems with Users (Workshop Summary). C. Kray and L. B. Larsen and P. L. Olivier and M. Biemans and A. van Bunningen and M. Fetter and T. Jay and V. Khan and G. Leitner and I. Mulder and J. Müller and T. Plötz and I. L. de Vallejo. (2008) In "Constructing Ambient Intelligence", Springer, Berlin, Heidelberg, New York, 63-74.

Special issue on evaluating pervasive and ubiquitous systems. International Journal of mobile HCI. S. Neely, G. Stevenson, C. Kray, I. Mulder, K. Connelly, and K. A. Siek (editors), 1 (2), 2009

2008

CGroup coordination and negotiation through spatial proximity regions around mobile devices on augmented tabletops. C. Kray, M. Rohs, J. Hook, S. Kratz. (2008) In: “Proceedings of IEEE Tabletop 2008”, IEEE Press, 1-8.

CExploring factors that influence the combined use of mobile devices and public displays for pedestrian navigation. J. Müller, M. Jensch, C. Kray, A. Krüger. (2008) In: “Proceedings of NordiCHI”, ACM Press, New York, NY, USA, 308-317.

Towards a location model for indoor navigation support through public displays and mobile devices. K. Cheverst, C. Kray, N. Taylor, M. Harrison, J. Wagner, F. Hamhoum (2008). Workshop on mobile interaction with the real world (MIRW) at mobile HCI 2008, Amsterdam, the Netherlands.

JExploring an option space to engineer a ubiquitous computing system. M. D. Harrison and C. Kray and J. C. Campos. (2008) Electronic Notes in Theoretical Computer Science (208) , 41--55. | PDF

Experiences of Supporting Local and Remote Mobile Phone Interaction with Touchscreen Based Situated Displays. K. Cheverst, D. Fitton, N. Taylor and C. Kray. (2008) In "Workshop: Designing and Evaluating Mobile Phone-Based Interaction with Public Displays at CHI 2008"

Reading with Mobile Phone and Large Display. R. Gostner, H. Gellersen, C. Kray and Corina Sas. (2008) In "Workshop: Designing and Evaluating Mobile Phone-Based Interaction with Public Displays at CHI 2008"

Facilitating Opportunistic Interaction with Ambient Displays. C. Kray and A. Galani and M. Rohs. (2008) In "Workshop on Designing and Evaluating Mobile Phone-Based Interaction with Public Displays at CHI 2008".

Evaluating Pervasive and Ubiquitous Systems (Conferences column). S. Neely, G. Stevenson, C. Kray, I Mulder, K. Connelly, and K A. Siek. (2008) IEEE Pervasive Computing Journal, 7(3), 85-88.

2007

CExploring an option space to engineer a ubiquitous computing system. M. D. Harrison and C. Kray and J. C. Campos. (2007) In Paul Curzon and Antonio Cerone (eds.): "Pre-proceedings of FMIS'07". 67-82. | PDF

Mediating Multi-Party Negotiation Through Marker-Based Tracking of Mobile Phones. M. Rohs and C. Kray. (2007) In "Workshop on Mobile Interaction with the Real World at Mobile HCI 2007". Singapore, September 9, 2007. | PDF

JAdaptive Positioning for Ambient Systems. C. Kray and G. Kortuem. (2007) Künstliche Intelligenz 4, 56-61. | PDF

CFactoring user experience into the design of ambient and mobile systems. M. D. Harrison and C. Kray and Z. Sun and H. Zhang. (2007) In "Proceedings of Engineering Interactive Systems". Springer, Berlin, Heidelberg, New York. | PDF

Swiss Army Knife meets Camera Phone: Tool Selection and Interaction using Visual Markers. C. Kray and M. Rohs. (2007) In "Workshop on Mobile Interaction with the Real World at Mobile HCI 2007". Singapore, September 9, 2007. | PDF

Taming Context: A Key Challenge in Evaluating the Usability of Ubiquitous Systems. C. Kray and P. Olivier and A. W. Guo and P. Singh and H. N. Ha and P. Blythe. (2007) In "Ubiquitous Systems Evaluation 2007 (USE'07) - Workshop at Ubicomp 2007". Innsbruck, Austria, September 16, 2007. | PDF

CEngaging with Cultural Content on Ambient Displays. C. Kray and A. Galani and K. Cheverst. Urban Screens 2007, Manchester, UK.

2006

Connecting rigorous system analysis to experience centred design in ambient and mobile systems. M. D. Harrison and C. Kray. (2006) In Gerd Kortuem (eds.): "Workshop on Software Engineering Challenges for Ubiquitous Computing". Lancaster, U.K. | PDF

CImmersive video as a rapid prototyping and evaluation tool for mobile and ambient applications. P. Singh and H. N. Ha and Z. Kuang and P. Olivier and C. Kray and P. Blythe and P. James. (2006) In "MobileHCI '06: Proceedings of the 8th conference on Human-computer interaction with mobile devices and services". ACM Press, New York, NY, USA, 264-264. | PDF

Rapid prototyping and evaluation of intelligent environments using immersive video. P. Singh and H. N. Ha and P. Olivier and C. Kray and Z. Kuang and A. W. Guo and P. Blythe and P. James. (2006) In "Proceedings of MODIE workshop at Mobile HCI'06". Espoo, Finland. | PDF

CCrossmodal Attention in Public-Private Displays. P. Olivier and S. W. Gilroy and H. Cao and D. G. Jackson and C. Kray. (2006) In "Proceedings of International Conference on Pervasive Services (ICPS)". 13-18. | PDF

CrossBoard: Crossmodal Access of Dense Public Displays. S. W. Gilroy and P. L. Olivier and H. Cao and D. G. Jackson and C. Kray and D. Lin. (2006) In "Workshop on Multimodal and Pervasive Services (MAPS'06)". Lyon, France. | PDF

CSharing control of dispersed situated displays between nomadic and residential users. C. Kray and K. Cheverst and D. Fitton and C. Sas and J. Patterson and M. Rouncefield and C. Stahl. (2006) In "MobileHCI '06: Proceedings of the 8th conference on Human-computer interaction with mobile devices and services". ACM Press, New York, NY, USA, 61-68. | PDF

2005

CExploring Bluetooth based Mobile Phone Interaction with the Hermes Photo Display. K. Cheverst and A. Dix and D. Fitton and C. Kray and M. Rouncefield and C. Sas and G. Saslis-Lagoudakis and J. G. Sheridan. (2005) In Manfred Tscheligi and Regina Bernhaupt and Kristijan Mihalic (eds.): "Proceedings of Mobile HCI 2005". ACM Press, New York, 47-54. | PDF

CA Relative Positioning System for Spatial Awareness of Co-located Mobile Devices and Users. M. Hazas and C. Kray and H. Gellersen and H. Agbota and G. Kortuem and A. Krohn. (2005) In Kang G. Shin and David Kotz and Brian D. Noble (eds.): "Proceedings of the third international conference on mobile systems, applications, and services (MobiSys 2005)". ACM Press, New York, 177-190. | PDF

JRapid Prototyping and User Centred Design of Interactive Display based Systems. D. Fitton and K. Cheverst and A. Dix and C. Kray and M. Rouncefield. (2005) IEEE Pervasive Computing (4) 4, 58-66. | PDF

Probing Designs: Designing Probes. K. Cheverst and A. Dix and D. Fitton and C. Kray and M. Rouncefield and C. Graham and G. Saslis-Lagoudakis. (2005) In "Workshop on Appropriate Methods for Design in Complex and Sensitive Settings at OzCHI 2005". Canberra, Australia. | PDF

CAdaptive Navigation Support with Public Displays. C. Kray and G. Kortuem and A. Krüger. (2005) In Robert St. Amant and John Riedl and Anthony Jameson (eds.): "Proceedings of IUI 2005". ACM Press, New York, 326-328. | PDF

BPresenting Route Instructions on Mobile Devices: From Textual Directions to 3D Visualization. V. Coors and C. Elting and C. Kray and K. Laakso. (2005) In J. Dykes and A.M. MacEachren and M.-J. Kraak (eds.): "Exploring Geovisualization". Elsevier, 529-550.

Towards an integrated approach to positioning. C. Kray and G. Kortuem. (2005) In "Workshop on Spatio-Temporal Reasoning at IJCAI'05". Edinburgh, Scotland. | PDF

JExploring Issues of User Model Transparency and Proactive Behaviour in an Office Environment Control System. K. Cheverst and H. E. Byon and D. Fitton and C. Sas and C. Kray and N. Villar. (2005) User Modeling and User-Adapted Interaction, special issue on Ubiquitous Computing and User Modeling (15) 3-4, 235-273. | PDF

CGoing more public: situated display design in a care setting through co-realisation. C. Graham and K. Cheverst and M. Rouncefield and C. Kray. (2005) In "DUX '05: Proceedings of the 2005 conference on Designing for User eXperience". AIGA: American Institute of Graphic Arts, New York, NY, USA, 18. | PDF

CSensing and visualizing spatial relations of mobile devices. G. Kortuem and C. Kray and H. Gellersen. (2005) In Patrick Baudisch and Mary Czerwinski and Dan Olsen (eds.): "Proceedings of UIST 2005". ACM Press, New York, 93-102. | PDF

HCI issues of dispersed public displays. G. Kortuem and C. Kray. (2005) In "Workshop on Distributed Display Environments at CHI'05". Portland, Oregon, USA. | PDF

Exploring Mobile Phone Interaction with Situated Displays. K. Cheverst and A. Dix and D. Fitton and C. Kray and M. Rouncefield and G. Saslis-Lagoudakis and J. G. Sheridan. (2005) In "Pervasive Mobile Interaction Devices (PERMID 2005), workshop at Pervasive 2005". Munich, Germany. | PDF

BA Survey of Map-based Mobile Guides. J. Baus and C. Kray and K. Cheverst. (2005) In Liquiu Meng and Alexander Zipf and Tumasch Reichenbacher (eds.): "Map-based Mobile Services". Springer, Berlin, Heidelberg, New York, 197-216.

2004

CInteractive Positioning based on Object Visibility. C. Kray and G. Kortuem. (2004) In Stephen Brewster and Mark Dunlop (eds.): "Proceedings of Mobile Human-Computer Interaction 2004". Springer, Berlin, Heidelberg, New York, 276-287. | PDF

Inducing Frames of Reference. C. Kray. (2004) In "Workshop on Spatio-Temporal Reasoning at ECAI 2004". Valencia, Spain. | PDF

CCooperative Artefacts: Assessing Real World Situations with Embedded Technology. M. Strohbach and H. Gellersen and G. Kortuem and C. Kray. (2004) In Nigel Davies and Elizabeth D. Mynatt and Itiro Siio (eds.): "Proceedings of Ubicomp 2004". Springer, Berlin, Heidelberg, New York, 250-267. | PDF

Concepts and Issues in Interfaces for Multiple Users and Multiple Devices. C. Kray and R. Wasinger and G. Kortuem. (2004) In "Proceedings of MU3I workshop at IUI 2004". 7-11. | PDF

Gesture-based interface reconfiguration. C. Kray and M. Strohbach. (2004) In "Proceedings of workshop on AI in mobile systems (AIMS 2004) at Ubicomp 2004". Seattle, WA, U.S.A. | PDF

CUsing Cooperative Artefacts as Basis for Activity Recognition. M. Strohbach and G. Kortuem and H. Gellersen and C. Kray. (2004) In "Proceedings of EUSAI 2004". Springer, Berlin, Heidelberg, New York, 49-60. | PDF

2003

Controlling multiple devices. R. Wasinger and C. Kray and C. Endres. (2003) In "Workshop on Physical Interaction at Mobile HCI 2003". Udine, Italy. | PDF

CSome Issues on Presentations in Intelligent Environment. C. Kray and A. Krüger and C. Endres. (2003) In Emile H. L. Aarts and René Collier and Evert van Loenen and Boris E. R. de Ruyter (eds.): "Proceedings of first European Symposium on Ambient Intelligence (EUSAI)". Springer, Berlin, Heidelberg, New York, 15-26. | PDF

CPresenting Route Instructions on Mobile Devices. C. Kray and K. Laakso and C. Elting and V. Coors. (2003) In W. Lewis Johnson and Elisabeth André and John Domingue (eds.): "Proceedings of IUI 03". ACM Press, Miami Beach, FL, 117-124. | PDF

Situated Interaction on Spatial Topics. C. Kray. (2003) Akademische Verlags-Gesellschaft AKA, Berlin. | PDF

PhD thesisSituated Interaction on Spatial Topics. C. Kray. (2003) Saarland University, Saarbrücken, Germany. | PDF

A Survey of Mobile Guides. C. Kray and J. Baus. (2003) In "Workshop on HCI in mobile guides (MGUIDES) at mobile HCI 2003". Udine, Italy. | PDF

2002

CThe eager bidder problem: a fundamental problem of DAI and selected solutions. M. Schillo and C. Kray and K. Fischer. (2002) In "AAMAS '02: Proceedings of the first international joint conference on Autonomous agents and multiagent systems". ACM, New York, NY, USA, 599-606. | PDF

Situational Context and Navigational Assistance. C. Kray. (2002) Poster at Spatial Cognition 2002, Tutzing, Starnberger See, Germany. | PDF

BPositionsinformation and Navigationsaufgaben. C. Kray and J. Baus and A. Krüger. (2002) Chapter in Geoinformation mobile, A. Zipf and J. Strobl (eds.), Wichmann Verlag. | PDF

CFrames of Reference, Positional Information and Navigational Assistance. J. Baus and C. Kray. (2002) In "Proceedings of the Fifteenth International Florida Artificial Intelligence Research Society Conference". AAAI Press, 461-465. | PDF

2001

CTwo Path Prepositions: along and past. C. Kray and J. Baus and H. Zimmer and H. Speiser and A. Krüger. (2001) In Daniel R. Montello (eds.): "Spatial Information Theory (Proceedings of COSIT'01)". Springer, Berlin, Heidelberg, New York, 263-277. | PDF

J REAL: Ein ressourcenadaptierendes mobiles Navigationssystem. W. Wahlster and J. Baus and C. Kray and A. Krüger. (2001) Informatik, Forschung und Entwicklung, Themenheft Mobile Computing (16) 4, 233-241. | PDF

CVisualization of route descriptions in a resource-adaptive navigation aid. J. Baus and C. Kray and A. Krüger. (2001) Cognitive Processing (2) 2-3, 323-345. | PDF

Towards adaptive location-aware mobile assistance. J. Baus and Y. Ding and C. Kray and U. Walther. (2001) In "Proceedings of workshop on AI in mobile systems (AIMS)". Seattle, WA, U.S.A. | PDF

CThe benefits of multi-agent systems in spatial reasoning. C. Kray. (2001) In "Proceedings of FLAIRS '01". AAAI Press, Menlo Park, CA, USA, 552-556. | PDF

CRAJA: a resource-adaptive Java agent infrastructure. Y. Ding and C. Kray and R. Malaka and M. Schillo. (2001) In Jörg P. Müller and Elisabeth André and Sandip Sen and Claude Frasson (eds.): "Proceedings of the Fifth International Conference on Autonomous Agents". ACM Press, Montreal, Canada, 332-339. | PDF

A Resource-Adaptive Mobile Navigation System. W. Wahlster and J. Baus and C. Kray and A. Krüger. (2001) In "Proceedings of the International Workshop on Information Presentation and Natural Multimodal Dialogue (IPNMD-2001)". Verona, Italy, 5-9. | PDF

Spatial Reasoning and Agents: Exploring Possibilities (Position Paper). C. Kray. (2001) In "Workshop on Spatio-Temporal Reasoning with an Agents Focus at IJCAI'01". Seattle, WA, U.S.A. | PDF

2000

Zu komplexen Diensten mit einfachen natürlichsprachlichen Interaktionen. V. Coors and C. Kray and R. Porzel. (2000) In "Workshop on Digital Storytelling (DISTEL 2000)". Darmstadt, Germany. | PDF

Spatial Cognition and Natural Language Interfaces in Mobile Personal Assistants. C. Kray and R. Porzel. (2000) In "Proceedings of workshop on AI in mobile systems (AIMS 2000)". | PDF

last century

CModeling the Basic Meanings of Path Relations. C. Kray and A. Blocher. (1999) In "Proceedings of the 16th IJCAI. Morgan Kaufmann, San Francisco, CA". 384-389. | PDF

Ressourcenadaptierende Verfahren zur Präzisionsbewertung von Lokalisationsausdrücken und zur Generierung von linguistischen Hecken. C. Kray. (1998) MSc thesis (Diplom), Saarland University, Saarbrücken, Germany. | PDF