Project Aura: Toward Distraction-Free Pervasive Computing
IEEE Pervasive Computing
A Middleware Infrastructure for Active Spaces
IEEE Pervasive Computing
The familiar stranger: anxiety, comfort, and play in public places
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Personal and Ubiquitous Computing
Active Surroundings: A Group-Aware Middleware for Embedded Application Systems
COMPSAC '04 Proceedings of the 28th Annual International Computer Software and Applications Conference - Volume 01
Dynamic service composition using semantic information
Proceedings of the 2nd international conference on Service oriented computing
P3 Systems: Putting the Place Back into Social Networks
IEEE Internet Computing
Extracting places from traces of locations
ACM SIGMOBILE Mobile Computing and Communications Review
QoS-aware dynamic service composition in ambient intelligence environments
Proceedings of the 20th IEEE/ACM international Conference on Automated software engineering
Adaptive Service Composition in Flexible Processes
IEEE Transactions on Software Engineering
SELF-SERV: a platform for rapid composition of web services in a peer-to-peer environment
VLDB '02 Proceedings of the 28th international conference on Very Large Data Bases
Modeling Semantic Web Services: The Web Service Modeling Language
Modeling Semantic Web Services: The Web Service Modeling Language
On using existing time-use study data for ubiquitous computing applications
UbiComp '08 Proceedings of the 10th international conference on Ubiquitous computing
On typologies of situated interaction
Human-Computer Interaction
MobiSoC: a middleware for mobile social computing applications
Mobile Networks and Applications
Out on the town: A socio-physical approach to the design of a context-aware urban guide
ACM Transactions on Computer-Human Interaction (TOCHI)
Understanding and measuring the urban pervasive infrastructure
Personal and Ubiquitous Computing
A Semantically-Based Task Model and Selection Mechanism in Ubiquitous Computing Environments
KES '09 Proceedings of the 13th International Conference on Knowledge-Based and Intelligent Information and Engineering Systems: Part II
Multisensor Fusion in Smartphones for Lifestyle Monitoring
BSN '10 Proceedings of the 2010 International Conference on Body Sensor Networks
KES-AMSTA'10 Proceedings of the 4th KES international conference on Agent and multi-agent systems: technologies and applications, Part II
KES'10 Proceedings of the 14th international conference on Knowledge-based and intelligent information and engineering systems: Part II
A mobile communication simulation system for urban space with user behavior scenarios
HPCC'05 Proceedings of the First international conference on High Performance Computing and Communications
Instrumenting the city: developing methods for observing and understanding the digital cityscape
UbiComp'06 Proceedings of the 8th international conference on Ubiquitous Computing
Journal of Ambient Intelligence and Smart Environments
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Ubiquitous and urban computing share the goal of enabling users to access networked services and resources anytime, anywhere. The intermesh of planned and situational activities is a distinguishable characteristic of urban computing environments. This produces a diversity of service requirements that need to be tackled by opportunistically suggesting appropriate services to users or social groups, without having a previous definition of applications in templates or any other descriptions in advance. This paper leverages the approach of task-oriented computing to represent user goals in tasks. A task is composed of unit-tasks: user centric configurations of abstract service coordinations. The focus of this paper is on the provision of a mechanism to cover the spontaneous unit-task composition cycle, based on social, spatial, and temporal aspects. This is realized by identifying the essential semantic elements that describe unit-tasks, UrbComp environments, and social groups. We have extended a unit-task selection mechanism from our previous work. In addition, this paper contributes a set of composability metrics based on social, spatial, and temporal aspects. These metrics concern the measurement of semantic interoperability and potential conflicts between unit-tasks or unit-task composites. These metrics are used to join unit-tasks together in sequences. Experimental results for a real dataset of tasks were obtained. These results show a suitable time-overhead for the unit-task selection mechanism. In addition, a simulation of arrivals at a crowded space was utilized to measure the performance, throughput, and efficacy ratio of the composition mechanism.