Decidability and expressiveness aspects of logic queries
PODS '87 Proceedings of the sixth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
The architecture of an active database management system
SIGMOD '89 Proceedings of the 1989 ACM SIGMOD international conference on Management of data
Journal of Symbolic Computation
A system architecture for context-aware mobile computing
A system architecture for context-aware mobile computing
Proceedings of the international conference on Formal Ontology in Information Systems - Volume 2001
2nd International Conference on Formal Ontology in Information Systems
An optimizing prolog front-end to a relational query system
SIGMOD '84 Proceedings of the 1984 ACM SIGMOD international conference on Management of data
Reconfigurable Context-Sensitive Middleware for Pervasive Computing
IEEE Pervasive Computing
ConChat: A Context-Aware Chat Program
IEEE Pervasive Computing
A Middleware Infrastructure for Active Spaces
IEEE Pervasive Computing
Building Applications for Ubiquitous Computing Environments
Pervasive '02 Proceedings of the First International Conference on Pervasive Computing
TABLEAUX '98 Proceedings of the International Conference on Automated Reasoning with Analytic Tableaux and Related Methods
Human-Computer Interaction
An infrastructure approach to context-aware computing
Human-Computer Interaction
Interaction issues in context-aware intelligent environments
Human-Computer Interaction
Human-Computer Interaction
Use of ontologies in a pervasive computing environment
The Knowledge Engineering Review
Reasoning about Uncertain Contexts in Pervasive Computing Environments
IEEE Pervasive Computing
Toward an OSGi-Based Infrastructure for Context-Aware Applications
IEEE Pervasive Computing
A service-oriented middleware for building context-aware services
Journal of Network and Computer Applications
Toward an Agent-Based and Context-Oriented Approach for Web Services Composition
IEEE Transactions on Knowledge and Data Engineering
GAS ontology: an ontology for collaboration among ubiquitous computing devices
International Journal of Human-Computer Studies - Protégé: community is everything
A context-aware middleware for multimodal dialogue applications with context tracing
MPAC '05 Proceedings of the 3rd international workshop on Middleware for pervasive and ad-hoc computing
UbiSrvInt - a context-aware fault-tolerant approach toward wireless P2P service provision
Expert Systems with Applications: An International Journal
Exploiting Context-Awareness for the Autonomic Management of Mobile Ad Hoc Networks
Journal of Network and Systems Management
Application polymorphism for autonomic ubiquitous computing
Multiagent and Grid Systems
The ECORA framework: A hybrid architecture for context-oriented pervasive computing
Pervasive and Mobile Computing
Dynamic context management for pervasive applications
The Knowledge Engineering Review
Proceedings of the 1st international workshop on Software architectures and mobility
Home-Explorer: Ontology-based physical artifact search and hidden object detection system
Mobile Information Systems - Mobile Systems and Applications
Proceedings of the 6th international conference on Mobile systems, applications, and services
Specification, decomposition and agent synthesis for situation-aware service-based systems
Journal of Systems and Software
Smart Sensing and Sensor Data Collection on the Move for Modelling Intelligent Environments
NEW2AN '08 / ruSMART '08 Proceedings of the 8th international conference, NEW2AN and 1st Russian Conference on Smart Spaces, ruSMART on Next Generation Teletraffic and Wired/Wireless Advanced Networking
Model-based fault detection in context-aware adaptive applications
Proceedings of the 16th ACM SIGSOFT International Symposium on Foundations of software engineering
Architecting ambient intelligence systems
HCC '08 Proceedings of the 3rd ACM international workshop on Human-centered computing
A self-adaptive context processing framework for wireless sensor networks
Proceedings of the 3rd international workshop on Middleware for sensor networks
Towards a service-oriented Middleware Enabling Context Awareness for Smart Environment
International Journal of Ad Hoc and Ubiquitous Computing
OTM '08 Proceedings of the OTM 2008 Confederated International Conferences, CoopIS, DOA, GADA, IS, and ODBASE 2008. Part I on On the Move to Meaningful Internet Systems:
Semantic approach for modelling an assistive environment using description logic
Proceedings of the 10th International Conference on Information Integration and Web-based Applications & Services
Facilitating human-centric service delivery using a pluggable service development framework
International Journal of Ad Hoc and Ubiquitous Computing
CDL: an Integrated Framework for Context Specification and Recognition
Proceedings of the 2008 conference on ECAI 2008: 18th European Conference on Artificial Intelligence
Cost efficient, adaptive reasoning strategies for pervasive service discovery
Proceedings of the 2009 international conference on Pervasive services
Dynamic situation modeling and reasoning under uncertainty
Proceedings of the 2009 international conference on Pervasive services
Physical interaction in pervasive computing: formal modeling, analysis and verification
Proceedings of the 2009 international conference on Pervasive services
An Ontology-Based Actuator Discovery and Invocation Framework in Home Care Systems
ICOST '09 Proceedings of the 7th International Conference on Smart Homes and Health Telematics: Ambient Assistive Health and Wellness Management in the Heart of the City
On-the-Fly Situation Composition within Smart Spaces
NEW2AN '09 and ruSMART '09 Proceedings of the 9th International Conference on Smart Spaces and Next Generation Wired/Wireless Networking and Second Conference on Smart Spaces
A hybrid approach to context modelling in large-scale pervasive computing environments
Proceedings of the Fourth International ICST Conference on COMmunication System softWAre and middlewaRE
A Weighted Approach to Partial Matching for Mobile Reasoning
ISWC '09 Proceedings of the 8th International Semantic Web Conference
Learning Player Behaviors in Real Time Strategy Games from Real Data
RSFDGrC '09 Proceedings of the 12th International Conference on Rough Sets, Fuzzy Sets, Data Mining and Granular Computing
A framework for mobile, context-aware applications
ICT'09 Proceedings of the 16th international conference on Telecommunications
PERSONAF: framework for personalised ontological reasoning in pervasive computing
User Modeling and User-Adapted Interaction
Semantic Matching Framework for handicap situation detection in smart environments
Journal of Ambient Intelligence and Smart Environments
Modeling contexts in collaborative environment: a new approach
CSCWD'06 Proceedings of the 10th international conference on Computer supported cooperative work in design III
Design of the middleware enabling context awareness and energy optimizing for smart environment
NBiS'07 Proceedings of the 1st international conference on Network-based information systems
Intelligent context-awareness system using improved self-adaptive back propagation algorithm
SEUS'07 Proceedings of the 5th IFIP WG 10.2 international conference on Software technologies for embedded and ubiquitous systems
A semantic P2P framework for building context-aware applications in multiple smart spaces
EUC'07 Proceedings of the 2007 international conference on Embedded and ubiquitous computing
Framework for extending RFID events with business rule
DASFAA'07 Proceedings of the 12th international conference on Database systems for advanced applications
Multi-layer faults in the architectures of mobile, context-aware adaptive applications
Journal of Systems and Software
A comprehensive context modeling framework for pervasive computing systems
DAIS'08 Proceedings of the 8th IFIP WG 6.1 international conference on Distributed applications and interoperable systems
User-centric mobile services: context provisioning and user profiling
Proceedings of the 11th Annual International Digital Government Research Conference on Public Administration Online: Challenges and Opportunities
Designing context awareness middleware architecture for personal healthcare information system
ICACT'10 Proceedings of the 12th international conference on Advanced communication technology
TwinSpace: an infrastructure for cross-reality team spaces
UIST '10 Proceedings of the 23nd annual ACM symposium on User interface software and technology
Distributed default logic for context-aware computing in multi-agent systems
RSCTC'10 Proceedings of the 7th international conference on Rough sets and current trends in computing
Context-aware service framework for decision-support applications using ontology-based modeling
PKAW'10 Proceedings of the 11th international conference on Knowledge management and acquisition for smart systems and services
Exploiting acoustic source localization for context classification in smart environments
AmI'10 Proceedings of the First international joint conference on Ambient intelligence
Business-aware framework for supporting RFID-enabled applications in EPC Network
Journal of Network and Computer Applications
Middleware support for internetware: a service perspective
Proceedings of the Second Asia-Pacific Symposium on Internetware
Probe: a system for context collection, dissemination and processing
Proceedings of the Second Asia-Pacific Symposium on Internetware
A dynamic context-aware architecture for ambient intelligence
IWANN'11 Proceedings of the 11th international conference on Artificial neural networks conference on Advances in computational intelligence - Volume Part II
Incorporating business logics into RFID-enabled applications
Information Processing and Management: an International Journal
A semantic model for actions and events in ambient intelligence
Engineering Applications of Artificial Intelligence
iConAwa - An intelligent context-aware system
Expert Systems with Applications: An International Journal
Open middleware-based infrastructure for context-aware in pervasive computing
CIS'04 Proceedings of the First international conference on Computational and Information Science
A context-aware music recommendation agent in smart office
FSKD'06 Proceedings of the Third international conference on Fuzzy Systems and Knowledge Discovery
On the dynamic management of information in ubiquitous systems using evolvable software components
APNOMS'06 Proceedings of the 9th Asia-Pacific international conference on Network Operations and Management: management of Convergence Networks and Services
Context adaptive self-configuration system
ICCS'05 Proceedings of the 5th international conference on Computational Science - Volume Part III
Context knowledge discovery in ubiquitous computing
OTM'05 Proceedings of the 2005 OTM Confederated international conference on On the Move to Meaningful Internet Systems
A component-based adaptive model for context-awareness in ubiquitous computing
EUC'05 Proceedings of the 2005 international conference on Embedded and Ubiquitous Computing
An enhanced ontology based context model and fusion mechanism
EUC'05 Proceedings of the 2005 international conference on Embedded and Ubiquitous Computing
Middleware architecture for context knowledge discovery in ubiquitous computing
EUC'05 Proceedings of the 2005 international conference on Embedded and Ubiquitous Computing
A framework for rapid development of RFID applications
ICCSA'06 Proceedings of the 2006 international conference on Computational Science and Its Applications - Volume Part IV
Research and implementation of the context-aware middleware based on neural network
AIS'04 Proceedings of the 13th international conference on AI, Simulation, and Planning in High Autonomy Systems
Context adaptive self-configuration system based on multi-agent
CONTEXT'05 Proceedings of the 5th international conference on Modeling and Using Context
Enhancing semantic spaces with event-driven context interpretation
PERVASIVE'05 Proceedings of the Third international conference on Pervasive Computing
Developing a context-aware system for providing intelligent robot services
EuroSSC'06 Proceedings of the First European conference on Smart Sensing and Context
A survey of context data distribution for mobile ubiquitous systems
ACM Computing Surveys (CSUR)
Architecture design for social web of things
Proceedings of the 1st International Workshop on Context Discovery and Data Mining
Semantic Matching Framework for handicap situation detection in smart environments
Journal of Ambient Intelligence and Smart Environments
Building user-defined runtime adaptation routines for stream processing applications
Proceedings of the VLDB Endowment
Proceedings of the 2012 ACM Conference on Ubiquitous Computing
Reconfigurable natural interaction in smart environments: approach and prototype implementation
Personal and Ubiquitous Computing
Optimizing sensor network reprogramming via in situ reconfigurable components
ACM Transactions on Sensor Networks (TOSN)
Context model for ubiquitous information services of public transport
UCAmI'12 Proceedings of the 6th international conference on Ubiquitous Computing and Ambient Intelligence
A Context-Aware Multi-Agent System as a Middleware for Ambient Intelligence
Mobile Networks and Applications
A Bio-chemical Approach to Awareness in Pervasive Systems
Proceedings of First International Workshop on Sensing and Big Data Mining
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Ubiquitous Computing advocates the construction of massively distributed systems that help transform physical spaces into computationally active and intelligent environments. The design of systems and applications in these environments needs to take account of heterogeneous devices, mobile users and rapidly changing contexts. Most importantly, agents in ubiquitous and mobile environments need to be context-aware so that they can adapt themselves to different situations. In this paper, we argue that ubiquitous computing environments must provide middleware support for context-awareness. We also propose a middleware that facilitates the development of context-aware agents. The middleware allows agents to acquire contextual information easily, reason about it using different logics and then adapt themselves to changing contexts. Another key issue in these environments is allowing autonomous, heterogeneous agents to have a common semantic understanding of contextual information. Our middleware tackles this problem by using ontologies to define different types of contextual information. This middleware is part of Gaia, our infrastructure for enabling Smart Spaces.