Professor Dr. Christian Kray

Professur für Geoinformatik (Prof. Kray)
Professor Dr. Christian Kray

Heisenbergstr. 2, Raum 241 (Büro) | Raum 245 (Labor)
48149 Münster

T: +49 251 83-33073

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Akademische Profile

Externes Profil

  • Publikationen

    • Koukouraki, Eftychia; Kray, Christian. . ‘Map Reproducibility in Geoscientific Publications: An Exploratory Study.’ In 12th International Conference on Geographic Information Science (GIScience 2023), edited by Beecham, Roger; Long, Jed A.; Smith, Dianna; Zhao, Qunshan; Wise, Sarah, 6:1–6:16. Dagstuhl, Germany: Dagstuhl Publishing. doi: https://doi.org/10.4230/LIPIcs.GIScience.2023.6.
    • Konkol M., Kray C., Suleiman J. . ‘Creating interactive scientific publications using bindings.’ Proceedings of the ACM on Human-Computer Interaction 3, Nr. EICS. doi: 10.1145/3331158.
    • Kray C, Pebesma E, Konkol M, Nüst D. . ‘Reproducible Research in Geoinformatics: Concepts, Challenges and Benefits (Vision Paper).’ In 14th International Conference on Spatial Information Theory (COSIT 2019), edited by Timpf S, Schlieder C, Kattenbeck M, Ludwig B, Stewart K, 8:1–8:13. Dagstuhl, Germany: Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik. doi: 10.4230/LIPIcs.COSIT.2019.8.
    • Du G, Kray C, Degbelo A. . ‘Interactive Immersive Public Displays as Facilitators for Deeper Participation in Urban Planning.’ International Journal of Human-Computer Interaction : 1–15. doi: 10.1080/10447318.2019.1606476.
    • Konkol M, Kray, C. . ‘In-depth examination of spatiotemporal figures in open reproducible research.’ Cartography and Geographic Information Science 2018. doi: 10.1080/15230406.2018.1512421.
    • Konkol M, Kray C, Pfeiffer M. . ‘Computational reproducibility in geoscientific papers: Insights from a series of studies with geoscientists and a reproduction study.’ International Journal of Geographical Information Science 2018. doi: 10.1080/13658816.2018.1508687.
    • Brox Christoph, Casteleyn Sven, Kray Christian, Painho Marco, Huerta Joaquín, Kuhn Werner. . ‘Brain Drain or Brain Gain? Insights from an Erasmus Mundus Masters Program.’ Contributed to the AGILE 2018 - 21th Conference on Geo-information Science, Lund, Sweden.
    • Granell C, Bhattacharya D, Casteleyn S, Degbelo A, Gould M, Kray C, Painho M, Trilles S. . ‘GEO-C: Enabling open cities and the Open City Toolkit.’ In Proceedings of the International Conference on Free and Open Source Software for Geospatial Applications (FOSS4G 2018) - Academic Track, 61–68. Dar es Salaam, Tanzania. doi: 10.5194/isprs-archives-XLII-4-W8-61-2018.
    • Bustamante AM, Degbelo A, Kray C. . ‘Exploring forced migrants (re)settlement & the role of digital services.’ In Proceedings of 16th European Conference on Computer-Supported Cooperative Work - Exploratory Papers (ECSCW 2018). Nancy, France: European Society for Socially Embedded Technologies (EUSSET). doi: 10.18420/ecscw2018_7.
    • Konkol M, Kray C, Pfeiffer M. . The State of Reproducibility in the Computational Geosciences. doi: 10.17605/OSF.IO/KZU8E.
    • Konkol M, Kray C. . In-depth examination of spatio-temporal figures in open reproducible research. doi: 10.17605/OSF.IO/Q53M8.
    • Ana Maria Bustamante Duarte, Nina Brendel, Auriol Degbelo, Christian Kray. . ‘Participatory design and participatory research: An HCI case study with young forced migrants.’ ACM Transactions on Computer-Human Interaction (TOCHI) 25, Nr. 1: 3. doi: 10.1145/3145472.
    • Degbelo A., Kray C. . ‘Intelligent Geovisualizations for Open Government Data (Vision Paper).’ Contributed to the ACM SIGSPATIAL/GIS 2018, Seattle, Washington, USA.
    • Ataei M., Degbelo A., Kray C. . ‘Privacy theory in practice: designing a user interface for managing location privacy on mobile devices.’ Journal of Location Based Services 2018. doi: 10.1080/17489725.2018.1511839.
    • Ataei M., Degbelo A., Kray C., Santos V. . ‘Complying with Privacy Legislation: From Legal Text to Implementation of Privacy-Aware Location-Based Services.’ International Journal of Geo-Information 2018.
    • Seuter M, Rodriguez E, Bauer G, Kray C. . ‘Running with Drones: Desired Services and Control Gestures.’ In Proceedings of the 30th Australian Conference on Computer-Human Interaction, 384–395. New York, NY, USA: ACM Press. doi: 10.1145/3292147.3292156.
    • Navas Medrano S, Pfeiffer M, Kray C. . ‘Deictic Communication across Distances: Visualising Remote Pointing Gestures on Mobile Devices.’ Contributed to the Proceedings of the 32nd International BCS Human Computer Interaction Conference (HCI 2018), Belfast, UK. doi: 10.14236/ewic/HCI2018.11.
    • Unrau R., Ostkamp M., Kray C.,. . ‘An approach for harvesting, visualizing, and analyzing WebGIS sessions to identify usability issues.’ Contributed to the EICS, Lissabon, Portugal. doi: 10.1145/3102113.3102122.
    • Konkol Markus, Nüst Daniel, Schutzeichel Marc, Pebesma Edzer, Kray Christian, Przibytzin Holger, Lorenz Jörg. „Opening reproducible research (o2r).“ contributed to the Open Science Conference, Berlin, Germany, .
    • Nüst D, Konkol M, Pebesma E, Kray C, Schutzeichel M, Przibytzin, H, Lorenz, J. . ‘Opening the Publication Process with Executable Research Compendia.’ D-Lib Magazine 23. doi: 10.1045/january2017-nuest.
    • Seuter M, Pfeiffer M, Bauer G, Zentgraf K, Kray C. . ‘Running with Technology: Evaluating the Impact of Interacting with Wearable Devices on Running Movement.’ Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies 1, Nr. 3: 101:1–101:17. doi: 10.1145/3130966.
    • Navas Medrano S, Pfeiffer M, Kray C. . ‘Enabling Remote Deictic Communication with Mobile Devices: An Elicitation Study.’ Contributed to the Proceedings of the 19th International Conference on Human-Computer Interaction with Mobile Devices and Services, Vienna, Austria. doi: 10.1145/3098279.3098544.
    • Verstegen J., Hillen F., Kray C. „A framework to monitor, model, and actively manage crowd behaviour.“ contributed to the The 20th AGILE Conference on Geographic Information Science, Wageningen, The Netherlands, .
    • Kray Christian, Schmid Falko, Fritze Holger. . ‘Guest editorial: map interaction.’ GeoInformatica 2017: 1–4. doi: 10.1007/s10707-016-0290-x.
    • Konkol, M, Kray, C, Ostkamp, M. . ‘Follow the signs - countering disengagement from the real world during city exploration.’ Contributed to the Agile, Wageningen.
    • Du G, Degbelo A, Kray C. . ‘Public Displays for Public Participation in Urban Settings: A Survey.’ In Proceedings of the 6th ACM International Symposium on Pervasive Displays, 17:1–17:9. New York, NY, USA: ACM Press. doi: 10.1145/3078810.3078825.
    • Mehrnaz Ataei, Christian Kray. . ‘Ephemerality Is the New Black: A Novel Perspective on Location Data Management and Location Privacy in LBS.’ In Progress in Location-Based Services 2016, edited by Mehrnaz Ataei, Christian Kray, 357–373.
    • C Eliseo, D Maureen, Y May, K Christian, F Paolo, Ballatore Andrea. . ‘13th International Conference on Spatial Information Theory (COSIT 2017).’ In 13th International Conference on Spatial Information Theory (COSIT 2017), edited by C Eliseo, D Maureen, Y May, K Christian, F Paolo, Ballatore Andrea.: LIPIcs.
    • Christian Kray, May Yuan. . ‘COSIT 2017 Short Papers—Introduction.’ Contributed to the International Conference on Spatial Information Theory, L’Aquila, Italien.
    • Holger Fritze, Auriol Degbelo, Tobias Brüggentisch, Christian Kray. . ‘Feature-centric ranking algorithms for georeferenced video search.’ Contributed to the 25th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems, Redondo Beach, California, USA.
    • Clementini E., Donnelly M., Yuan M., Kray C., Fogliaroni P., Ballatore A. . ‘Proceedings of 13th International Conference on Spatial Information Theory, COSIT 2017.’ Contributed to the 13th International Conference on Spatial Information Theory, COSIT 2017, Wadern, Deutschland.
    • Ranasinghe Champika, Kray Christian. . ‘Visualizing Location Uncertainty on Mobile Devices: Assessing Users’ Perception and Preferences.’ Contributed to the AGILE, Helsinki, Finland. doi: 10.1007/978-3-319-33783-8_18.
    • Fechner T, Schlarmann D, Kray C. . ‘Facilitating Citizen Engagement in Situ: Assessing the Impact of Pro-Active Geofenced Notifications.’ In Proceedings of the 18th International Conference on Human-Computer Interaction with Mobile Devices and Services - MobileHCI '16. New York, New York, USA: ACM Press. doi: 10.1145/2935334.293537. [online first]
    • Fechner T, Kray C. . ‘Presenting Citizen Engagement Opportunities Online: The Relevancy of Spatial Visualization.’ In Lecture Notes in Geoinformation and Cartography, edited by Sarjakoski T, Santos MY, Sarjakoski T, 105–121. Springer International Publishing. doi: 10.1007/978-3-319-33783-8_7.
    • Nüst Daniel, Konkol Markus, Pebesma Edzer, Kray Christian, Klötgen Stephanie, Schutzeichel Marc, Lorenz Jörg, Przibytzin Holger, Kussmann Dirk. „Opening Reproducible Research.“ contributed to the EGU, Vienna, .
    • Degbelo A, Granell C, Trilles S, Bhattacharya D, Casteleyn S, Kray C. . ‘Opening up Smart Cities: Citizen-Centric Challenges and Opportunities from GIScience.’ ISPRS International Journal of Geo-Information 5, Nr. 2: 16. doi: 10.3390/ijgi5020016.
    • Auriol Degbelo, Carlos Granell, Sergio Trilles, Devanjan Bhattacharya, Sven Casteleyn, Christian Kray. . ‘Opening up Smart Cities.’ ISPRS International Journal of Geo-Information 5.
    • Degbelo A., Trilles S., Kray C., Bhattacharya D., Schiestel N., Wissing J., Granell C. . ‘Designing Semantic Application Programming Interfaces for Open Government Data. .’ JeDEM 2016: 21–58.
    • Fritze Holger, Kray Christian. . ‘Community and Governmental Responses to an Urban Flash Flood.’ Contributed to the 12th International Conference on Information Systems for Crisis Response & Management, Kristiansand, Norwegen. [accepted / in Press (not yet published)]
    • Konkol M, Kray C, Fechner T. . ‘Providing directions in indoor spaces: two approaches for public displays compared.’ Contributed to the AGILE, Lissabon, Portugal. [accepted / in Press (not yet published)]
    • Martella, R., Kray, C., Clementini, E. . ‘A Gamification Framework for Volunteered Geographic Information.’ Contributed to the AGILE, Lissabon, Portugal. [accepted / in Press (not yet published)]
    • Ostkamp, M., Heitmann, S., Kray, C. . ‘Short-range optical interaction between smartphones and public displays.’ Contributed to the 4th International Symposium on Pervasive Displays (PerDis 2015), Saarbrücken. [accepted / in Press (not yet published)]
    • Wilhelm, D., Fechner, T., Ostkamp, M., Kray, C. . ‘Natural interaction with video environments using gestures and a mirror-image avatar.’ Contributed to the Interact, Bamberg, Deutschland. [accepted / in Press (not yet published)]
    • Flynn, D., Nesbitt, D.J., Ford, G.A., McMeekin, P., Rodgers, H., Price, C., Kray, C., and Thomson, R.G. . ‘Development of a computerised decision aid for thrombolysis in acute stroke care.’ BMC Med. Inf. & Decision Making 15, Nr. 6.
    • Fechner T, Wilhelm D, Kray C. . ‘Ethermap - Real-time Collaborative Map Editing.’ Contributed to the Conference on Human Factors in Computing Systems (CHI'15), Seoul, South Korea. doi: 10.1145/2702123.2702536.
    • Morin Ostkamp, Christian Kray, Gernot Bauer. . ‘Towards a privacy threat model for public displays.’ Contributed to the 7th ACM SIGCHI Symposium on Engineering Interactive Computing Systems, Duisburg, Deutschland.
    • F. Schmid, C. Kray, H. Fritze. . ‘MapInteract 2014 Workshop Report the 2nd ACM SIGSPATIAL International Workshop on Interacting with Maps.’ Contributed to the SIGSPATIAL, Dallas, Texas, USA.
    • Schmid F., Kray C. . ‘Highlights from MAPINTERACT 2013: the 1st ACM SIGSPATIAL Workshop on Interacting with Maps: held in conjunction with the 21st ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (Orlando, Florida, November 5, 2013).’ SIGSPATIAL Special 6, Nr. 1: 23–24. doi: 10.1145/2684380.2684391.
    • Fechner T, Kray C. . ‘Georeferenced Open Data and Augmented Interactive Geo-Visualizations as Catalysts for Citizen Engagement.’ JeDEM - eJournal of eDemocracy and Open Government 6, Nr. 3: 14–35.
    • Delikostidis I, Fritze H, Fechner T, Kray C. . ‘Bridging the Gap Between Field- and Lab-Based User Studies for Location-Based Services.’ In Progress in Location-Based Services 2014, edited by Gartner G, Huang H, 257–271. Springer International Publishing. doi: 10.1007/978-3-319-11879-6_18.
    • Ostkamp M, Kray C. . ‘Supporting design, prototyping, and evaluation of public display systems.’ In Proceedings of the 2014 ACM SIGCHI symposium on Engineering interactive computing systems, 263–272. doi: 10.1145/2607023.2607035.
    • Langner N, Kray C. . ‘Assessing the Impact of Dynamic Public Signage on Mass Evacuation.’ In Proceedings of The International Symposium on Pervasive Displays, 136. doi: 10.1145/2611009.2611033.
    • Kray C., Delikostidis I. . ‘Evaluating location-based services (a position paper).’ Contributed to the Workshop on GeoHCI at CHI 2013, Paris, Frankreich.
    • Ostkamp M., Kray C. . ‘Prototyping mobile AR in immersive video environments.’ Contributed to the Workshop on Designing Mobile Augmented Reality at Mobile HCI 2013, München, Deutschland.
    • Ostkamp, M., Hülsermann, J., Kray, C., Bauer, G. . ‘Using mobile devices to enable visual multiplexing on public displays: three approaches compared.’ Contributed to the 12th International Conference on Mobile and Ubiquitous Multimedia (MUM '13), New York, USA.
    • Delikostidis Ioannis, Fechner Thore, Fritze Holger, AbdelMouty Ahmed Mahmoud, Kray Christian. . ‘Evaluating Mobile Applications in Virtual Environments: A Survey.’ In International Journal of Mobile Human Computer Interaction, edited by Lumsden, Joanna, 1–19. doi: 10.4018/ijmhci.2013100101.
    • Kray C, Fritze H, Fechner T, Schwering A, Li R, Anacta VJA. . ‘Transitional Spaces: Between Indoor and Outdoor Spaces.’ In COSIT, edited by Tenbrink , Stell J, Galton A, Wood Z, 14–32. doi: 10.1007/978-3-319-01790-7_2.
    • Bartoschek T, Pape G, Kray C, Jones J, Kauppinen T. . ‘Gestural Interaction with Spatiotemporal Linked Open Data.’ OSGEO Journal 11.
    • Kray C., Kuhn W., Pebesma E., Schwering A. (Eds.): . GI Zeitgeist 2012 - Proceedings of the Young Researchers Forum on Geographic Information Science. Heidelberg: Akademische Verlagsgesellschaft.
    • Utami T.F., Kray C. . ‘Opportunistic Localization to Support Disaster Mitigation in Public Indoor Environments.’ Contributed to the International Workshop on Smart Mobile Applications at Pervasive 2012, Newcastle upon Tyne, UK.
    • Möller A., Roalter L., Huitl R., Diewald S., Kray C., Kranz M. . ‘Tool Support for Prototyping Interfaces for Vision-Based Indoor Navigation.’ Contributed to the Workshop on mobile vision and HCI at Mobile HCI 2012, San Francisco, USA.
    • Ostkamp M, Bauer G, Kray C. . ‘Visual highlighting on public displays.’ In PerDis, 2.
    • Fechner T, Kray C. . ‘Attacking Location Privacy: Exploring Human Strategies.’ In UbiComp '12 Proceedings of the 2012 ACM Conference on Ubiquitous Computing , 95–98. Pittsburgh, Pennsylvania, United States: ACM Press.
    • Hamhoum F, Kray C. . ‘Supporting pilgrims in navigating densely crowded religious sites.’ Personal and Ubiquitous Computing 16: pp. 1–11.
    • Hamhoum F, Kray C. . ‘Scalable Navigation Support for Crowds: Personalized Guidance via Augmented Signage.’ In COSIT, 40–56.
    • Wagner J, Kray. C. . ‘Assessing the feasibility of opportunistic peer-to-peer positioning for pedestrians.’ In Ubicomp in the Large: Collaborative Sensing and Collective Phenomena, Workshop at Pervasive 2010.
    • Wagner J, Kray. C. . ‘Opportunistic peer-to-peer pedestrian positioning system.’ In Poster at Pervasive 2010, Helsinki, Finland.
    • Page R, Kray. C. . ‘Ethics and Persuasive Technology: An Exploratory Study in the Context of Healthy Living.’ In NIMD'10: First International Workshop on Nudge and Influence Through Mobile Devices at Mobile HCI'10.
    • Müller J, Michaelis D, Kray. C. . ‘Evaluating Natural User Interfaces for Public Displays in the Wild.’ In Workshop on Natural User Interfaces: the prospect and challenge of touch and gestural computing at CHI 2010.
    • Kray C, Nesbitt D, Dawson J, Rohs M. . ‘User-defined gestures for connecting mobile phones, public displays, and tabletops.’ In Mobile HCI, 239–248.
    • Döring T, Pfleging B, Kray C, Schmidt A. . ‘Design by physical composition for complex tangible user interfaces.’ In CHI Extended Abstracts, 3541–3546.
    • Neely S., Stevenson G., Kray C., Mulder I., Connelly K., Siek K. A. (Eds.): . Special issue on evaluating pervasive and ubiquitous systems. International Journal of mobile HCI. .
    • Gellersen H, Fischer C, Guinard D, Gostner R, Kortuem G, Kray C, Rukzio E, Streng S. . ‘Supporting Device Discovery and Spontaneous Interaction with Spatial References.’ Personal and Ubiquitous Computing 13, Nr. 4: 255–264. doi: 10.1007/s00779-008-0206-3.
    • Kray C, Rohs M, Hook J, Kratz SG. . ‘Bridging the gap between the Kodak and the Flickr generations: A novel interaction technique for collocated photo sharing.’ International Journal of Human-Computer Studies 67, Nr. 12: 1060–1072. doi: 10.1016/j.ijhcs.2009.09.006.
    • Snowdon C, Kray C. . ‘Exploring the use of landmarks for mobile navigation support in natural environments.’ In Mobile HCI.
    • Martin Tomko, Kai-Florian Richter, John Bateman, Guoray Cai, Kenny Coventry, Sara Fabrikant, Parick Healey, Stephen Hirtle, Christian Kray, Antonio Krüger, Stefan Münzer, Thora Tenbrink, Stephan Winter. . ADAPTATION IN SPATIAL COMMUNICATION.
    • Katie A Siek, Steve Neely, Graeme Stevenson, Christian Kray, I Mulder. . ‘Advances in evaluating mobile and ubiquitous systems.’ Special issue preface, IJMHCI 2.
    • Connelly K, Siek KA, Mulder I, Neely S, Stevenson G, Kray C. . ‘Evaluating Pervasive and Ubiquitous Systems.’ IEEE Pervasive Computing 7, Nr. 3: 85–88.
    • Kray C, Rohs M, Hook J, Kratz SG. . ‘Group coordination and negotiation through spatial proximity regions around mobile devices on augmented tabletops.’ In Tabletop, 1–8.
    • Müller J, Jentsch M, Kray C, Krüger A. . ‘Exploring factors that influence the combined use of mobile devices and public displays for pedestrian navigation.’ In NordiCHI, 308–317.
    • Henze N, Broll G, Rukzio E, Rohs M, Zimmermann A, Boll S (Eds.): . Mobile Interaction with the Real World 2008, MIRW 2008, Mobile HCI Workshop, Amsterdam, The Netherlands, September 2, 2008. : unbekannt / n.a. / unknown.
    • Kray C, Cheverst K, Harrison MD, Hamhoum F, Wagner J. . ‘Towards a location model for indoor navigation support through public displays and mobile devices.’ In MIRW, 83–92.
    • Kray C, Larsen LB, Olivier PL, Biemans M, van Bunningen A, Fetter M, Jay T, Khan V, Leitner G, Mulder I, Müller J, Plötz T, de Vallejo IL. . ‘Evaluating Ubiquitous Systems with Users (Workshop Summary).’ In workshop proceedings, AmI-07. [accepted / in Press (not yet published)]
    • Kray C, Galani A, Rohs M. . ‘Facilitating Opportunistic Interaction with Ambient Displays.’ In Workshop on Designing and Evaluating Mobile Phone-Based Interaction with Public Displays at CHI 2008.
    • Gostner R, Gellersen H, Kray C, Sas C. . ‘Reading with Mobile Phone and Large Display.’ In Workshop on Designing and Evaluating Mobile Phone-Based Interaction with Public Displays at CHI 2008.
    • Cheverst K, Fitton D, Taylor N, Kray C. . ‘Experiences of Supporting Local and Remote Mobile Phone Interaction with Touchscreen Based Situated Displays.’ In Workshop on Designing and Evaluating Mobile Phone-Based Interaction with Public Displays at CHI 2008.
    • Graeme Stevenson, Steve Neely, Christian Kray. . ‘Ubiquitous Systems Evaluation (USE ‘08).’ on ubiquitous Computing 1.
    • Keith Cheverst, Dan Fitton, Nick Taylor, Christian Kray. . ‘Experiences of Supporting Local and Remote Mobile Phone Interaction with Touchscreen Based Situated Displays.’ Contributed to the CHI 2008, Florenz, Italien.
    • Roswitha Gostner, Hans Gellersen, Christian Kray, Corina Sas. . ‘Reading with Mobile Phone & Large Display.’ Contributed to the CHI08, Florenz, Italien.
    • Keith Cheverst, Nick Taylor, Mark Rouncefield, Areti Galani, Christian Kray. . ‘The challenge of evaluating situated display based technology interventions designed to foster a sense of community.’ Contributed to the UbiComp 2008 Workshop on Ubiquitous Systems Evaluation, Seoul Korea.
    • Harrison MD, Kray C, Campos. JC. . ‘Exploring an option space to engineer a ubiquitous computing system.’ In Pre-proceedings of FMIS'07.
    • Rohs M, Kray C. . ‘Mediating Multi-Party Negotiation Through Marker-Based Tracking of Mobile Phones.’ In Workshop on Mobile Interaction with the Real World at Mobile HCI 2007. Singapore. [accepted / in Press (not yet published)]
    • Kray C, Rohs M. . ‘Swiss Army Knife meets Camera Phone: Tool Selection and Interaction using Visual Markers.’ In Workshop on Mobile Interaction with the Real World at Mobile HCI 2007. Singapore. [accepted / in Press (not yet published)]
    • Kray C, Olivier P, Guo AW, Singh P, Ha HN, Blythe P. . ‘Taming Context: A Key Challenge in Evaluating the Usability of Ubiquitous Systems.’ In Ubiquitous Systems Evaluation 2007 (USE'07) - Workshop at Ubicomp 2007. Innsbruck, Austria. [accepted / in Press (not yet published)]
    • Kray C, Kortuem G. . ‘Adaptive Positioning for Ambient Systems.’ Künstliche Intelligenz 2007, Nr. 4: 56––61.
    • Kray C, Galani A, Cheverst K. . Engaging with Cultural Content on Ambient Displays.
    • Harrison MD, Kray C, Sun Z, Zhang H. . ‘Factoring user experience into the design of ambient and mobile systems.’ In Proceedings of Engineering Interactive Systems. Berlin, Heidelberg, New York: Springer.
    • H CAO, S GILROY, D JACKSON, C KRAY, P OLIVIER. . CROSSBOARD: Crossmodal Access of Dense Public Displays..
    • Harrison M. D., Kray C., Campos J. C. . ‘Exploring an option space to engineer a ubiquitous computing system.’ Contributed to the FMIS 2007, Lancaster, UK.
    • Singh P, Ha HN, Olivier P, Kray C, Kuang Z, Guo AW, Blythe P, James P. . ‘Rapid prototyping and evaluation of intelligent environments using immersive video.’ In Proceedings of MODIE workshop at Mobile HCI'06. Espoo, Finland. [accepted / in Press (not yet published)]
    • Singh P, Ha HN, Kuang Z, Olivier P, Kray C, Blythe P, James P. . ‘Immersive video as a rapid prototyping and evaluation tool for mobile and ambient applications.’ In MobileHCI '06: Proceedings of the 8th conference on Human-computer interaction with mobile devices and services, 264––264. New York, NY, USA: ACM Press.
    • Olivier P, Gilroy SW, Cao H, Jackson DG, Kray C. . ‘Crossmodal Attention in Public-Private Displays.’ In Proceedings of International Conference on Pervasive Services (ICPS), 13––18.
    • Kray C, Cheverst K, Fitton D, Sas C, Patterson J, Rouncefield M, Stahl C. . ‘Sharing control of dispersed situated displays between nomadic and residential users.’ In MobileHCI '06: Proceedings of the 8th conference on Human-computer interaction with mobile devices and services, 61––68. New York, NY, USA: ACM Press.
    • Harrison MD, Kray C. . ‘Connecting rigorous system analysis to experience centred design in ambient and mobile systems.’ In Workshop on Software Engineering Challenges for Ubiquitous Computing, edited by Kortuem G. Lancaster, U.K.
    • Gilroy SW, Olivier PL, Cao H, Jackson DG, Kray C, Lin D. . ‘CrossBoard: Crossmodal Access of Dense Public Displays.’ In Workshop on Multimodal and Pervasive Services (MAPS'06). Lyon, France.
    • Connor Graham, Keith Cheverst, Christian Kray, Mark Rouncefield. . ‘AIGA-Going More Public: Situated Display Design in a Care Setting through Co-realisation.’ Gain: Journal of Business and Design 1.
    • Andreas Butz, Christian Kray, Antonio Krüger, Carsten Schwesig. . ‘Workshop W2: multi-user and ubiquitous user interfaces (MU3I 2006).’ Contributed to the 11th international conference on Intelligent user interfaces, Sydney, Australien.
    • Christian Kray, Keith Cheverst, Dan Fitton, Corina Sas, John Patterson, Mark Rouncefield, Christoph Stahl. . ‘Sharing control of dispersed situated displays between nand residential users.’ Contributed to the 8th conference on Human-computer interaction with mobile devices and services, Espoo, Finland.
    • Kray C, Kortuem G, Krüger A. . ‘Adaptive Navigation Support with Public Displays.’ In Proceedings of IUI 2005, edited by Amant RS, Riedl J, Jameson A, 326––328. New York: ACM Press.
    • Kray C, Kortuem G. . ‘Towards an integrated approach to positioning.’ In Workshop on Spatio-Temporal Reasoning at IJCAI'05. Edinburgh, Scotland.
    • Kortuem G, Kray C, Gellersen H. . ‘Sensing and visualizing spatial relations of mobile devices.’ In Proceedings of UIST 2005, edited by Baudisch P, Czerwinski M, Olsen D, 93––102. New York: ACM Press.
    • Kortuem G, Kray C. . ‘HCI issues of dispersed public displays.’ In Workshop on Distributed Display Environments at CHI'05. Portland, Oregon, USA.
    • Hazas M, Kray C, Gellersen H, Agbota H, Kortuem G, Krohn A. . ‘A Relative Positioning System for Spatial Awareness of Co-located Mobile Devices and Users.’ In Proceedings of the third international conference on mobile systems, applications, and services (MobiSys 2005), edited by Shin KG, Kotz D, Noble BD, 177––190. New York: ACM Press.
    • Graham C, Cheverst K, Rouncefield M, Kray C. . ‘Going more public: situated display design in a care setting through co-realisation.’ In DUX '05: Proceedings of the 2005 conference on Designing for User eXperience, 18. New York, NY, USA: ACM Press.
    • Fitton D, Cheverst K, Dix A, Kray C, Rouncefield M. . ‘Rapid Prototyping and User Centred Design of Interactive Display based Systems.’ IEEE Pervasive Computing 4, Nr. 4: 58––66. doi: 10.1109/MPRV.2005.85.
    • Coors V, Elting C, Kray C, Laakso K. . ‘Presenting Route Instructions on Mobile Devices: From Textual Directions to 3D Visualization.’ In Exploring Geovisualization, edited by Dykes J, MacEachren A, Kraak M, 529––550. Elsevier.
    • Cheverst K, Dix A, Fitton D, Kray C, Rouncefield M, Saslis-Lagoudakis G, Sheridan JG. . ‘Exploring Mobile Phone Interaction with Situated Displays.’ In Pervasive Mobile Interaction Devices (PERMID 2005), workshop at Pervasive 2005. Munich, Germany.
    • Cheverst K, Dix A, Fitton D, Kray C, Rouncefield M, Sas C, Saslis-Lagoudakis G, Sheridan JG. . ‘Exploring Bluetooth based Mobile Phone Interaction with the Hermes Photo Display.’ In Proceedings of Mobile HCI 2005, edited by Tscheligi M, Bernhaupt R, Mihalic K, 47––54. New York: ACM Press.
    • Cheverst K, Dix A, Fitton D, Kray C, Rouncefield M, Graham C, Saslis-Lagoudakis G. . ‘Probing Designs: Designing Probes.’ In Workshop on Appropriate Methods for Design in Complex and Sensitive Settings at OzCHI 2005. Canberra, Australia.
    • Cheverst K, Byon HE, Fitton D, Sas C, Kray C, Villar N. . ‘Exploring Issues of User Model Transparency and Proactive Behaviour in an Office Environment Control System.’ User Modeling and User-Adapted Interaction, special issue on Ubiquitous Computing and User Modeling 15, Nr. 3-4: 235––273.
    • Baus J, Kray C, Cheverst K. . ‘A Survey of Map-based Mobile Guides.’ In Map-based Mobile Services, edited by Meng L, Zipf A, Reichenbacher T, 197––216. Berlin, Heidelberg, New York: Springer VDI Verlag.
    • K Cheverst, Alan Dix, D Fitton, C Kray, M Rouncefield, C Graham, G Saslis-Lagoudakis. . ‘Probing Designs: Designing Probes.’ Contributed to the OzCHI 2005, Canberra, Australien.
    • Christian Kray, Andreas Butz, Antonio Krüger, Albrecht Schmidt, Helmut Prendinger. . ‘Multi-user and ubiquitous user interfaces:(MU3I 2005).’ Contributed to the 10th international conference on Intelligent user interfaces, San Diego, USA.
    • Christian Kray, Jörg Baus. . ‘AIMS 2005: artificial intelligence in mobile systems.’ Contributed to the 7th international conference on Human computer interaction with mobile devices & services, Salzburg, Österreich.
    • Gerd Kortuem, Christian Kray. . ‘HCI issue of dispersed public displays.’ Contributed to the CHI 2005, Portland, Oregon, USA.
    • Daniel Fitton, Keith Cheverst, Christian Kray, Alan Dix, Mark Rouncefield, George Saslis-Lagoudakis. . ‘Rapid prototyping and user-centered design of interactive display-based systems.’ IEEE Pervasive Computing 4.
    • Mike Hazas, Christian Kray, Hans Gellersen, Henoc Agbota, Gerd Kortuem, Albert Krohn. . ‘A relative positioning system for co-located mobile devices.’ Contributed to the 3rd international conference on Mobile systems, applications, and services, Seattle, WA, USA.
    • Strohbach M, Kortuem G, Gellersen H, Kray C. . ‘Using Cooperative Artefacts as Basis for Activity Recognition.’ In Proceedings of EUSAI 2004, 49––60. Berlin, Heidelberg, New York: Springer. [accepted / in Press (not yet published)]
    • Strohbach M, Gellersen H, Kortuem G, Kray C. . ‘Cooperative Artefacts: Assessing Real World Situations with Embedded Technology.’ In Proceedings of Ubicomp 2004, edited by Davies N, Mynatt ED, Siio I, 250––267. Berlin, Heidelberg, New York: Springer. [accepted / in Press (not yet published)]
    • Kray C, Wasinger R, Kortuem G. . ‘Concepts and Issues in Interfaces for Multiple Users and Multiple Devices.’ In Proceedings of MU3I workshop at IUI 2004, 7––11. [accepted / in Press (not yet published)]
    • Kray C, Strohbach M. . ‘Gesture-based interface reconfiguration.’ In Proceedings of workshop on AI in mobile systems (AIMS 2004) at Ubicomp 2004. Seattle, WA, U.S.A. [accepted / in Press (not yet published)]
    • Kray C, Kortuem G. . ‘Interactive Positioning based on Object Visibility.’ In Proceedings of Mobile Human-Computer Interaction 2004, edited by Brewster S, Dunlop M, 276––287. Berlin, Heidelberg, New York: Springer.
    • Kray C. . ‘Inducing Frames of Reference.’ In Workshop on Spatio-Temporal Reasoning at ECAI 2004. Valencia, Spain.
    • Andreas Butz, Antonio Krüger, Christian Kray, Albrecht Schmidt. . ‘Workshop W5: multi-user and ubiquitous user interfaces (MU3I).’ Contributed to the 9th international conference on Intelligent user interfaces, Funchal, Portugal.
    • Wasinger R, Kray C, Endres C. . ‘Controlling multiple devices.’ In Workshop on Physical Interaction at Mobile HCI 2003. Udine, Italy. [accepted / in Press (not yet published)]
    • Kray C, Krüger A, Endres C. . ‘Some Issues on Presentations in Intelligent Environment.’ In Proceedings of first European Symposium on Ambient Intelligence (EUSAI), 15––26. Berlin, Heidelberg, New York: Springer. [accepted / in Press (not yet published)]
    • Kray C, Baus J. . ‘A Survey of Mobile Guides.’ In Workshop on HCI in mobile guides (MGUIDES) at mobile HCI 2003. Udine, Italy.
    • Kray C. . Situated Interaction on Spatial Topics Dissertationsschrift, Saarland University, Saarbrücken, Germany. Saarbrücken, Germany: Akademische Verlagsgesellschaft.
    • Kray C, Elting C, Laakso K, Coors V. . ‘Presenting route instructions on mobile devices.’ In Proceedings of the 8th international conference on Intelligent user interfaces, 117––124.
    • Katri Laakso, Christian Kray. . ‘TellMaris and deep map: two navigational assistants.’ Contributed to the 8th international conference on Intelligent user interfaces, Miami, Florida, USA.
    • Kray C, Baus J, Krüger A. . „Positionsinformation und Navigationsaufgaben.“ In Geoinformation mobil, herausgegeben von Zipf A, Strobl J, 98–108.
    • Schillo M; Kray C; Fischer K. . ‘The eager bidder problem: a fundamental problem of DAI and selected solutions.’ In AAMAS '02: Proceedings of the first international joint conference on Autonomous agents and multiagent systems, edited by Association for Computing Machinery, 599–606. New York, NY, USA: ACM Press. doi: 10.1145/544862.544886.
    • Kray C. „Situational Context and Navigational Assistance.“ contributed to the Spatial Cognition 2002, Tutzing Starnberger See, Germany, .
    • Baus J, Kray C. . ‘Frames of Reference, Positional Information and Navigational Assistance.’ In Proceedings of the Fifteenth International Florida Artificial Intelligence Research Society Conference, 461––465.: AAAI Press.
    • Wahlster W, Baus J, Kray C, Krüger A. . ‘ REAL: Ein ressourcenadaptierendes mobiles Navigationssystem.’ Informatik, Forschung und Entwicklung, Themenheft Mobile Computing 16, Nr. 4: 233––241. doi: 10.1007/s004500100093.
    • Wahlster W, Baus J, Kray C, Krüger A. . ‘ A Resource-Adaptive Mobile Navigation System.’ In Proceedings of the International Workshop on Information Presentation and Natural Multimodal Dialogue (IPNMD-2001), 5––9. Verona, Italy. [accepted / in Press (not yet published)]
    • Kray C, Baus J, Zimmer H, Speiser H, Krüger A. . ‘Two Path Prepositions: along and past.’ In Spatial Information Theory {(Proceedings of COSIT'01)}, edited by Montello DR, 263––277. Berlin, Heidelberg, New York: Springer.
    • Kray C. . ‘Spatial Reasoning and Agents: Exploring Possibilities (Position Paper).’ In Workshop on Spatio-Temporal Reasoning with an Agents Focus at IJCAI'01. Seattle, WA, U.S.A.
    • Kray C. . ‘The benefits of multi-agent systems in spatial reasoning.’ In Proceedings of FLAIRS '01, 552––556. Menlo Park, CA, USA: AAAI Press.
    • Ding Y, Kray C, Malaka R, Schillo M. . ‘RAJA: a resource-adaptive Java agent infrastructure.’ In Proceedings of the Fifth International Conference on Autonomous Agents, 332–339. Montreal, Canada: ACM Press.
    • Baus J, Kray C, Krüger A. . ‘Visualization of route descriptions in a resource-adaptive navigation aid.’ Cognitive Processing 2, Nr. 2--3: 323––345.
    • Baus J, Ding Y, Kray C, Walther U. . ‘Towards adaptive location-aware mobile assistance.’ In Proceedings of workshop on AI in mobile systems (AIMS). Seattle, WA, U.S.A.
    • Christian Kray, Jörg Baus, Hubert Zimmer, Harry Speiser, Antonio Krüger. . ‘Two Path Preposition: Along and Past.’ Contributed to the International Conference on Spatial Information Theory, Morro Bay, CA, USA.
    • Kray C, Porzel R. . ‘Spatial Cognition and Natural Language Interfaces in Mobile Personal Assistants.’ In Proceedings of workshop on AI in mobile systems (AIMS 2000). [accepted / in Press (not yet published)]
    • Coors V, Kray C, Porzel R. . ‘Zu komplexen Diensten mit einfachen natürlichsprachlichen Interaktionen.’ In Workshop on Digital Storytelling (DISTEL 2000). Darmstadt, Germany.
    • Kray C, Blocher A. . ‘Modeling the Basic Meanings of Path Relations.’ In Proceedings of the 16th IJCAI. Morgan Kaufmann, San Francisco, CA, 384–389.
    • Kray C. . Ressourcenadaptierende Verfahren zur Präzisionsbewertung von Lokalisationsausdrücken und zur Generierung von linguistischen Hecken. Dissertationsschrift, Saarland University. Saarbrücken.

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    Publishing Reproducible Geoscientific Papers: Status quo, benefits, and opportunities
    Juanovich Naranjo Zolotov, MijailDeterminants of information and communication technologies for the online citizen participation adoption in urban contexts
    Acedo Sánchez, AlbertPlace and City: merging our affective and social spatial dimension in the (smart) platial city
    Pajarito Grajales, DiegoMobile Services for Green Living
    Benitez Paez, Manuel FernandoA user-centric framework to improve the reusability of open geodata in cities
    Epa Ranasinghe, Champika ManelAdapting Navigation Support to Positional Information of Varying Quality
    Location Data Privacy: Principles to Practice
    Participation & (Re)Settlement: Envisioning Mobile Services with Young Forced Migrants
    Supporting Public Participation through Interactive Immersive Public Displays
    Integrating Augmented Interactive Geo-visualizations and Open Government
    Designing Privacy-Preserving Personalized Public Display Systems

    Habilitation

    Leveraging Georeferenced Open Government Data