Christian Kray

118 papers A* 3A 8B 5Misc 10Journal 41Unranked 48

Year	Rank	Type	Title / Venue / Authors
2025	J	`jnl`	Approximate vs. precise location in popular location-based services. J. Locat. Based Serv. Sven Heitmann, Alexia Pagotto, Christian Kray
2025	—	`conf`	Assessing Map Reproducibility with Visual Question-Answering: An Empirical Evaluation. GIScience Eftychia Koukouraki, Auriol Degbelo, Christian Kray
2025	—	`conf`	Assessing the extent of the honey-pot effect on public display: a preliminary study in a virtual environment. AHs Noko Kuratomo, Christian Kray, Keiichi Zempo
2025	J	`jnl`	Explicit vs. Implicit Auditory Displays for Managing People Flow in a Pandemic: An Exploratory Study. Interact. Comput. Noko Kuratomo, Benjamin Karic, Christian Kray
2025	J	`jnl`	Honey-pot effect on pedestrian attention to public displays in a virtual environment: head turns, walking past, and direct approaches. Frontiers Virtual Real. Noko Kuratomo, Christian Kray, Keiichi Zempo
2025	—	`conf`	Poster: Toward a Systematic Assessment of Map Reproduction Success Using OCR. ACM REP Yohannes Abrha Mulaw, Eftychia Koukouraki, Christian Kray
2025	—	`conf`	Quantifying the Impact of k-Anonymizing Trajectory Data on Common Traffic Management Use Cases. SIGSPATIAL/GIS Christian Fries, Jan Kettler, Thorsten Paßfeld, Ralf Tönjes, Christian Kray
2024	J	`jnl`	Collecting Data in an Immersive Video Environment to Set up an Agent-Based Model of Pedestrians' Compliance with COVID-Related Interventions. J. Artif. Soc. Soc. Simul. Benjamin Karic, Jan Stenkamp, Michael Brüggemann, Simon Schröder, Christian Kray, Judith Verstegen
2024	—	`conf`	FreeMapRetrieve: Freehand Gestures for Retrieve Operations in Large-Screen Map Environments. AGILE Conf. Jonas Hurst, Auriol Degbelo, Christian Kray
2024	J	`jnl`	Linking location privacy, digital sovereignty and location-based services: a meta review. J. Locat. Based Serv. Simge Özdal-Oktay, Sven Heitmann, Christian Kray
2023	—	`conf`	Design and Effect of Guiding Sound for Pedestrians While Maintaining the Streetscape Perception. SUI Noko Kuratomo, Benjamin Karic, Christian Kray
2023	—	`conf`	Map Reproducibility in Geoscientific Publications: An Exploratory Study. GIScience Eftychia Koukouraki, Christian Kray
2023	—	`conf`	Towards dynamically generating immersive video scenes for studying human-environment interactions. AGILE Conf. Simon Schröder, Jan Stenkamp, Michael Brüggemann, Benjamin Karic, Judith Anne Verstegen, Christian Kray
2023	J	`jnl`	Using an Immersive Video Environment to Assess Pedestrians' Compliance With COVID Distance Keeping Interventions. Interact. Comput. Jan Stenkamp, Benjamin Karic, Paula Scharf, Judith Anne Verstegen, Christian Kray
2022	J	`jnl`	'Informed' consent in popular location based services and digital sovereignty. J. Locat. Based Serv. Jerome Dreyer, Sven Heitmann, Felix Erdmann, Gernot Bauer, Christian Kray
2022	J	`jnl`	Interaction pattern analysis for WebGIS usability evaluation. Trans. GIS René Unrau, Aditya Kudekar, Christian Kray
2021	—	`conf`	Enhancing Usability Evaluation of Web-Based Geographic Information Systems (WebGIS) with Visual Analytics. GIScience (I) René Unrau, Christian Kray
2021	J	`jnl`	Geofreebie: A Location-Based Freecycling App to Support Forced Migrant Resettlement. CoRR Lucas Braun, Auriol Degbelo, Christian Kray
2021	J	`jnl`	Geofreebie: a location-based freecycling app to support forced migrant resettlement. J. Locat. Based Serv. Lucas Braun, Auriol Degbelo, Christian Kray
2021	—	`conf`	Mining Map Interaction Semantics in web-based Geographic Information Systems (WebGIS) for Usability Analysis. AGILE Conf. René Unrau, Christian Kray
2020	J	`jnl`	Interactive Immersive Public Displays as Facilitators for Deeper Participation in Urban Planning. Int. J. Hum. Comput. Interact. Guiying Du, Christian Kray, Auriol Degbelo
2020	J	`jnl`	Recognizing Running Movement Changes with Quaternions on a Sports Watch. Proc. ACM Interact. Mob. Wearable Ubiquitous Technol. Matthias Seuter, Alexandra Pollock, Gernot Bauer, Christian Kray
2020	J	`jnl`	Remote Deictic Communication: Simulating Deictic Pointing Gestures across Distances Using Electro Muscle Stimulation. Int. J. Hum. Comput. Interact. Samuel Navas Medrano, Max Pfeiffer, Christian Kray
2019	J	`jnl`	Computational reproducibility in geoscientific papers: Insights from a series of studies with geoscientists and a reproduction study. Int. J. Geogr. Inf. Sci. Markus Konkol, Christian Kray, Max Pfeiffer
2019	J	`jnl`	Creating Interactive Scientific Publications using Bindings. Proc. ACM Hum. Comput. Interact. Markus Konkol, Christian Kray, Jan Suleiman
2019	B	`conf`	Evaluating User Experience under Location Quality Variations: A Framework for in-the-wild Studies. MobileHCI Champika Ranasinghe, Max Pfeiffer, Sven Heitmann, Christian Kray
2019	J	`jnl`	Map plasticity. CoRR Christian Kray, Auriol Degbelo
2019	—	`conf`	Reproducible Research in Geoinformatics: Concepts, Challenges and Benefits (Vision Paper). COSIT Christian Kray, Edzer J. Pebesma, Markus Konkol, Daniel Nüst
2019	J	`jnl`	Usability evaluation for geographic information systems: a systematic literature review. Int. J. Geogr. Inf. Sci. René Unrau, Christian Kray
2019	J	`jnl`	User-Generated Gestures for Voting and Commenting on Immersive Displays in Urban Planning. Multimodal Technol. Interact. Guiying Du, Auriol Degbelo, Christian Kray
2019	B	`conf`	Visualising Location Uncertainty to Support Navigation under Degraded GPS Signals: a Comparison Study. MobileHCI Champika Ranasinghe, Nicholas Schiestel, Christian Kray
2018	J	`jnl`	Complying with Privacy Legislation: From Legal Text to Implementation of Privacy-Aware Location-Based Services. ISPRS Int. J. Geo Inf. Mehrnaz Ataei, Auriol Degbelo, Christian Kray, Vítor Santos
2018	—	`conf`	Exploring Forced Migrants (Re)settlement & the Role of Digital Services. ECSCW Exploratory Papers Ana Maria Bustamante Duarte, Auriol Degbelo, Christian Kray
2018	J	`jnl`	Gestural interaction with 3D objects shown on public displays: an elicitation study. IxD&A Guiying Du, Auriol Degbelo, Christian Kray, Marco Painho
2018	—	`conf`	Intelligent geovisualizations for open government data (vision paper). SIGSPATIAL/GIS Auriol Degbelo, Christian Kray
2018	J	`jnl`	Location Information Quality: A Review. Sensors Champika Ranasinghe, Christian Kray
2018	J	`jnl`	Participatory Design and Participatory Research: An HCI Case Study with Young Forced Migrants. ACM Trans. Comput. Hum. Interact. Ana Maria Bustamante Duarte, Nina Brendel, Auriol Degbelo, Christian Kray
2018	Misc	`conf`	Pedestrian navigation and GPS deteriorations: user behavior and adaptation strategies. OZCHI Champika Ranasinghe, Sven Heitmann, Albert Hamzin, Max Pfeiffer, Christian Kray
2018	J	`jnl`	Privacy theory in practice: designing a user interface for managing location privacy on mobile devices. J. Locat. Based Serv. Mehrnaz Ataei, Auriol Degbelo, Christian Kray
2018	Misc	`conf`	Running with drones: desired services and control gestures. OZCHI Matthias Seuter, Eduardo Rodriguez Macrillante, Gernot Bauer, Christian Kray
2018	J	`jnl`	Visualizing Location Uncertainty on Mobile Devices: Cross-Cultural Differences in Perceptions and Preferences. Proc. ACM Interact. Mob. Wearable Ubiquitous Technol. Champika Ranasinghe, Jakub Krukar, Christian Kray
2017	—	`ed.`	13th International Conference on Spatial Information Theory, COSIT 2017, L'Aquila, Italy, September 4-8, 2017 COSIT Eliseo Clementini, Maureen Donnelly, May Yuan, Christian Kray, Paolo Fogliaroni, Andrea Ballatore
2017	Misc	`conf`	An approach for harvesting, visualizing, and analyzing WebGIS sessions to identify usability issues. EICS René Unrau, Morin Ostkamp, Christian Kray
2017	—	`conf`	COSIT 2017 Short Papers - Introduction. COSIT (Workshops/Posters) Christian Kray, May Yuan
2017	B	`conf`	Enabling remote deictic communication with mobile devices: an elicitation study. MobileHCI Samuel Navas Medrano, Max Pfeiffer, Christian Kray
2017	—	`conf`	Feature-centric ranking algorithms for georeferenced video search. SIGSPATIAL/GIS Holger Fritze, Auriol Degbelo, Tobias Brüggentisch, Christian Kray
2017	—	`conf`	Follow the Signs - Countering Disengagement from the Real World During City Exploration. AGILE Conf. Markus Konkol, Christian Kray, Morin Ostkamp
2017	J	`jnl`	Guest editorial: map interaction. GeoInformatica Christian Kray, Falko Schmid, Holger Fritze
2017	J	`jnl`	Opening the Publication Process with Executable Research Compendia. D Lib Mag. Daniel Nüst, Markus Konkol, Edzer J. Pebesma, Christian Kray, Marc Schutzeichel, Holger Przibytzin, Jörg Lorenz
2017	—	`conf`	Public displays for public participation in urban settings: a survey. PerDis Guiying Du, Auriol Degbelo, Christian Kray
2017	J	`jnl`	Running with Technology: Evaluating the Impact of Interacting with Wearable Devices on Running Movement. Proc. ACM Interact. Mob. Wearable Ubiquitous Technol. Matthias Seuter, Max Pfeiffer, Gernot Bauer, Karen Zentgraf, Christian Kray
2016	—	`conf`	Ephemerality Is the New Black: A Novel Perspective on Location Data Management and Location Privacy in LBS. LBS Mehrnaz Ataei, Christian Kray
2016	B	`conf`	Facilitating citizen engagement in situ: assessing the impact of pro-active geofenced notifications. MobileHCI Thore Fechner, Dominik Schlarmann, Christian Kray
2016	J	`jnl`	Opening up Smart Cities: Citizen-Centric Challenges and Opportunities from GIScience. ISPRS Int. J. Geo Inf. Auriol Degbelo, Carlos Granell, Sergio Trilles, Devanjan Bhattacharya, Sven Casteleyn, Christian Kray
2016	—	`conf`	Presenting Citizen Engagement Opportunities Online: The Relevancy of Spatial Visualization. AGILE Conf. Thore Fechner, Christian Kray
2016	—	`conf`	Visualizing Location Uncertainty on Mobile Devices: Assessing Users' Perception and Preferences. AGILE Conf. Champika Manel Ranasinghe, Christian Kray
2015	—	`conf`	A Gamification Framework for Volunteered Geographic Information. AGILE Conf. Roberta Martella, Christian Kray, Eliseo Clementini
2015	—	`conf`	Community and Governmental Responses to an Urban Flash Flood. ISCRAM Holger Fritze, Christian Kray
2015	J	`jnl`	Development of a computerised decision aid for thrombolysis in acute stroke care. BMC Medical Informatics Decis. Mak. Darren Flynn, Daniel J. Nesbitt, Gary A. Ford, Peter McMeekin, Helen Rodgers, Christopher Price, Christian Kray, Richard G. Thomson
2015	A*	`conf`	Ethermap: Real-time Collaborative Map Editing. CHI Thore Fechner, Dennis Wilhelm, Christian Kray
2015	J	`jnl`	MapInteract 2014 Workshop Report the 2nd ACM SIGSPATIAL International Workshop on Interacting with Maps Dallas, Texas, USA - November 4, 2014. ACM SIGSPATIAL Special Falko Schmid, Christian Kray, Holger Fritze
2015	—	`conf`	Natural Interaction with Video Environments Using Gestures and a Mirror Image Avatar. INTERACT (2) Christian Kray, Dennis Wilhelm, Thore Fechner, Morin Ostkamp
2015	—	`conf`	Short-range optical interaction between smartphones and public displays. PerDis Morin Ostkamp, Sven Heitmann, Christian Kray
2015	Misc	`conf`	Towards a privacy threat model for public displays. EICS Morin Ostkamp, Christian Kray, Gernot Bauer
2014	—	`conf`	Assessing the Impact of Dynamic Public Signage on Mass Evacuation. PerDis Norman Langner, Christian Kray
2014	—	`conf`	Bridging the Gap Between Field- and Lab-Based User Studies for Location-Based Services. LBS Ioannis Delikostidis, Holger Fritze, Thore Fechner, Christian Kray
2014	J	`jnl`	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). ACM SIGSPATIAL Special Falko Schmid, Christian Kray
2014	—	`ed.`	Proceedings of the 2nd ACM SIGSPATIAL International Workshop on Interacting with Maps, MapInteract 2014, Dallas/Fort Worth, Texas, USA, November 4, 2014 MapInteract@GIS Falko Schmid, Christian Kray, Holger Fritze
2014	Misc	`conf`	Supporting design, prototyping, and evaluation of public display systems. EICS Morin Ostkamp, Christian Kray
2013	J	`jnl`	Evaluating Mobile Applications in Virtual Environments: A Survey. Int. J. Mob. Hum. Comput. Interact. Ioannis Delikostidis, Thore Fechner, Holger Fritze, Ahmed Mahmoud AbdelMouty, Christian Kray
2013	—	`conf`	Transitional Spaces: Between Indoor and Outdoor Spaces. COSIT Christian Kray, Holger Fritze, Thore Fechner, Angela Schwering, Rui Li, Vanessa Joy A. Anacta
2013	B	`conf`	Using mobile devices to enable visual multiplexing on public displays: three approaches compared. MUM Morin Ostkamp, Jonas Hülsermann, Christian Kray, Gernot Bauer
2012	Misc	`conf`	Attacking location privacy: exploring human strategies. UbiComp Thore Fechner, Christian Kray
2012	J	`jnl`	Supporting pilgrims in navigating densely crowded religious sites. Pers. Ubiquitous Comput. Fathi Hamhoum, Christian Kray
2012	—	`conf`	Visual highlighting on public displays. PerDis Morin Ostkamp, Gernot Bauer, Christian Kray
2011	—	`conf`	Scalable Navigation Support for Crowds: Personalized Guidance via Augmented Signage. COSIT Fathi Hamhoum, Christian Kray
2010	—	`conf`	Design by physical composition for complex tangible user interfaces. CHI Extended Abstracts Tanja Döring, Bastian Pfleging, Christian Kray, Albrecht Schmidt
2010	—	`conf`	User-defined gestures for connecting mobile phones, public displays, and tabletops. Mobile HCI Christian Kray, Daniel J. Nesbitt, John Dawson, Michael Rohs
2009	J	`jnl`	Bridging the gap between the Kodak and the Flickr generations: A novel interaction technique for collocated photo sharing. Int. J. Hum. Comput. Stud. Christian Kray, Michael Rohs, Jonathan Hook, Sven G. Kratz
2009	—	`conf`	Exploring the use of landmarks for mobile navigation support in natural environments. Mobile HCI Caroline Snowdon, Christian Kray
2009	J	`jnl`	Supporting device discovery and spontaneous interaction with spatial references. Pers. Ubiquitous Comput. Hans Gellersen, Carl Fischer, Dominique Guinard, Roswitha Gostner, Gerd Kortuem, Christian Kray, Enrico Rukzio, Sara Streng
2008	J	`jnl`	Evaluating Pervasive and Ubiquitous Systems. IEEE Pervasive Comput. Kay Connelly, Katie A. Siek, Ingrid Mulder, Steve Neely, Graeme Stevenson, Christian Kray
2008	Misc	`conf`	Exploring factors that influence the combined use of mobile devices and public displays for pedestrian navigation. NordiCHI Jörg Müller, Marc Jentsch, Christian Kray, Antonio Krüger
2008	—	`conf`	Group coordination and negotiation through spatial proximity regions around mobile devices on augmented tabletops. Tabletop Christian Kray, Michael Rohs, Jonathan Hook, Sven G. Kratz
2008	—	`conf`	Towards a location model for indoor navigation support through public displays and mobile devices. MIRW Christian Kray, Keith Cheverst, Michael D. Harrison, Fathi Hamhoum, Jürgen Wagner
2007	J	`jnl`	Adaptive Positioning for Ambient Systems. Künstliche Intell. Christian Kray, Gerd Kortuem
2007	—	`conf`	Evaluating Ubiquitous Systems with Users (Workshop Summary). AmI Workshops Christian Kray, Lars Bo Larsen, Patrick Olivier, Margit Biemans, Arthur H. van Bunningen, Mirko Fetter, Tim Jay, Vassilis-Javed Khan, Gerhard Leitner, Ingrid Mulder, Jörg Müller, Thomas Plötz, Irene López de Vallejo
2007	—	`conf`	Exploring an Option Space to Engineer a Ubiquitous Computing System. FMIS@BCS HCI Michael D. Harrison, Christian Kray, José Creissac Campos
2007	—	`conf`	Factoring User Experience into the Design of Ambient and Mobile Systems. EHCI/DS-VIS Michael D. Harrison, Christian Kray, Zhiyu Sun, Huqiu Zhang
2006	—	`conf`	Crossmodal Attention in Public-Private Displays. ICPS Patrick Olivier, Stephen W. Gilroy, Han Cao, Daniel Jackson, Christian Kray
2006	—	`conf`	Immersive video as a rapid prototyping and evaluation tool for mobile and ambient applications. Mobile HCI Pushpendra Singh, Hai Nam Ha, Zhiwen Kuang, Patrick Olivier, Christian Kray, Phil T. Blythe, Phil James
2006	—	`conf`	Sharing control of dispersed situated displays between nand residential users. Mobile HCI Christian Kray, Keith Cheverst, Dan Fitton, Corina Sas, John Patterson, Mark Rouncefield, Christoph Stahl
2006	A	`conf`	Workshop W2: multi-user and ubiquitous user interfaces (MU3I 2006). IUI Andreas Butz, Christian Kray, Antonio Krüger, Carsten Schwesig
2005	A	`conf`	A relative positioning system for co-located mobile devices. MobiSys Mike Hazas, Christian Kray, Hans-Werner Gellersen, Henoc Agbota, Gerd Kortuem, Albert Krohn
2005	—	`conf`	AIMS 2005: artificial intelligence in mobile systems. Mobile HCI Christian Kray, Jörg Baus
2005	A	`conf`	Adaptive navigation support with public displays. IUI Christian Kray, Gerd Kortuem, Antonio Krüger
2005	J	`jnl`	Exploring Issues of User Model Transparency and Proactive Behaviour in an Office Environment Control System. User Model. User Adapt. Interact. Keith Cheverst, Hee Byun, Dan Fitton, Corina Sas, Christian Kray, Nicolas Villar
2005	—	`conf`	Exploring Mobile Phone Interaction with Situated Displays. PERMID Keith Cheverst, Alan J. Dix, Dan Fitton, Christian Kray, Mark Rouncefield, George Saslis-Lagoudakis, Jennifer G. Sheridan
2005	—	`conf`	Exploring bluetooth based mobile phone interaction with the hermes photo display. Mobile HCI Keith Cheverst, Alan J. Dix, Daniel Fitton, Christian Kray, Mark Rouncefield, Corina Sas, George Saslis-Lagoudakis, Jennifer G. Sheridan
2005	A	`conf`	Multi-user and ubiquitous user interfaces: (MU3I 2005). IUI Christian Kray, Andreas Butz, Antonio Krüger, Albrecht Schmidt, Helmut Prendinger
2005	J	`jnl`	Rapid prototyping and user-centered design of interactive display-based systems. IEEE Pervasive Comput. Daniel Fitton, Keith Cheverst, Christian Kray, Alan J. Dix, Mark Rouncefield, George Saslis-Lagoudakis
2005	A*	`conf`	Sensing and visualizing spatial relations of mobile devices. UIST Gerd Kortuem, Christian Kray, Hans-Werner Gellersen
2004	Misc	`conf`	Cooperative Artefacts: Assessing Real World Situations with Embedded Technology. UbiComp Martin Strohbach, Hans-Werner Gellersen, Gerd Kortuem, Christian Kray
2004	—	`conf`	Interactive Positioning Based on Object Visibility. Mobile HCI Christian Kray, Gerd Kortuem
2004	—	`conf`	Using Cooperative Artefacts as Basis for Activity Recognition. EUSAI Martin Strohbach, Gerd Kortuem, Hans-Werner Gellersen, Christian Kray
2004	A	`conf`	Workshop W5: multi-user and ubiquitous user interfaces (MU3I). IUI Andreas Butz, Antonio Krüger, Christian Kray, Albrecht Schmidt
2003	A	`conf`	Presenting route instructions on mobile devices. IUI Christian Kray, Christian Elting, Katri Laakso, Volker Coors
2003	—	`—`	Situated interaction on spatial topics. Christian Kray
2003	—	`conf`	Some Issues on Presentations in Intelligent Environments. EUSAI Christian Kray, Antonio Krüger, Christoph Endres
2003	A	`conf`	TellMaris and deep map: two navigational assistants. IUI Katri Laakso, Christian Kray
2002	Misc	`conf`	Frames of Reference, Positional Information and Navigational Assistance. FLAIRS Jörg Baus, Christian Kray
2002	A	`conf`	The eager bidder problem: a fundamental problem of DAI and selected solutions. AAMAS Michael Schillo, Christian Kray, Klaus Fischer
2001	—	`conf`	RAJA: a resource-adaptive Java agent infrastructure. Agents Yun Ding, Rainer Malaka, Christian Kray, Michael Schillo
2001	J	`jnl`	REAL: Ein ressourcenadaptierendes mobiles Navigationssystem. Inform. Forsch. Entwickl. Wolfgang Wahlster, Jörg Baus, Christian Kray, Antonio Krüger
2001	J	`jnl`	Representation and Processing of Knowledge about Distances in Environmental Spaces. Künstliche Intell. Christian Kray
2001	Misc	`conf`	The Benefits of Multi-Agent Systems in Spatial Reasoning. FLAIRS Christian Kray
2001	—	`conf`	Two Path Prepositions: Along and Past. COSIT Christian Kray, Jörg Baus, Hubert D. Zimmer, Harry R. Speiser, Antonio Krüger
1999	A*	`conf`	Modeling the Basic Meanings of Path Relations. IJCAI Christian Kray, Anselm Blocher