Supporting valid-time indeterminacy
ACM Transactions on Database Systems (TODS)
The context toolkit: aiding the development of context-enabled applications
Proceedings of the SIGCHI conference on Human Factors in Computing Systems
The anatomy of a context-aware application
MobiCom '99 Proceedings of the 5th annual ACM/IEEE international conference on Mobile computing and networking
Probabilistic temporal databases, I: algebra
ACM Transactions on Database Systems (TODS)
Project Aura: Toward Distraction-Free Pervasive Computing
IEEE Pervasive Computing
TAG: a Tiny AGgregation service for Ad-Hoc sensor networks
OSDI '02 Proceedings of the 5th symposium on Operating systems design and implementationCopyright restrictions prevent ACM from being able to make the PDFs for this conference available for downloading
Context-Aware Computing Applications
WMCSA '94 Proceedings of the 1994 First Workshop on Mobile Computing Systems and Applications
An infrastructure approach to context-aware computing
Human-Computer Interaction
An Architecture for the Integration of Physical and Informational Spaces
Personal and Ubiquitous Computing
Implementing access control to people location information
Proceedings of the ninth ACM symposium on Access control models and technologies
On location models for ubiquitous computing
Personal and Ubiquitous Computing
Inconsistency detection and resolution for context-aware middleware support
Proceedings of the 10th European software engineering conference held jointly with 13th ACM SIGSOFT international symposium on Foundations of software engineering
Context for Ubiquitous Data Management
UDM '05 Proceedings of the International Workshop on Ubiquitous Data Management
Consistent Modelling of Users, Devices and Sensors in a Ubiquitous Computing Environment
User Modeling and User-Adapted Interaction
Access control to people location information
ACM Transactions on Information and System Security (TISSEC)
Incremental consistency checking for pervasive context
Proceedings of the 28th international conference on Software engineering
Rewards-based negotiation for providing context information
Proceedings of the 4th international workshop on Middleware for Pervasive and Ad-Hoc Computing (MPAC 2006)
Exploiting Context-Awareness for the Autonomic Management of Mobile Ad Hoc Networks
Journal of Network and Systems Management
A survey of context-aware middleware
SE'07 Proceedings of the 25th conference on IASTED International Multi-Conference: Software Engineering
Domain-based context management for dynamic and evolutionary environments
Proceedings of the 4th on Middleware doctoral symposium
Towards seamless user mobility in service oriented environments via context awareness
Proceedings of the 5th international conference on Pervasive services
Schema matching for context-aware computing
UbiComp '08 Proceedings of the 10th international conference on Ubiquitous computing
Security Provisioning in Pervasive Environments Using Multi-objective Optimization
ESORICS '08 Proceedings of the 13th European Symposium on Research in Computer Security: Computer Security
Middleware for ubiquitous context-awareness
Proceedings of the 6th international workshop on Middleware for pervasive and ad-hoc computing
Synthesizing Context for a Sports Domain on a Mobile Device
EuroSSC '08 Proceedings of the 3rd European Conference on Smart Sensing and Context
Towards a Service-Oriented Approach for Managing Context in Mobile Environment
ICSOC '08 Proceedings of the 6th International Conference on Service-Oriented Computing
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
Context-aware middleware for pervasive elderly homecare
IEEE Journal on Selected Areas in Communications - Special issue on wireless and pervasive communications for healthcare
A Framework for Decentralized, Context-Aware Mobile Applications Using Semantic Web Technology
OTM '09 Proceedings of the Confederated International Workshops and Posters on On the Move to Meaningful Internet Systems: ADI, CAMS, EI2N, ISDE, IWSSA, MONET, OnToContent, ODIS, ORM, OTM Academy, SWWS, SEMELS, Beyond SAWSDL, and COMBEK 2009
An agent-based framework for context-aware services
UAHCI'07 Proceedings of the 4th international conference on Universal access in human-computer interaction: ambient interaction
Evaluating confidence in context for context-aware security
AmI'07 Proceedings of the 2007 European conference on Ambient intelligence
Bringing quality of context into wearable human activity recognition systems
QuaCon'09 Proceedings of the 1st international conference on Quality of context
Addressing context dependency using profile context in overlay networks
CCNC'10 Proceedings of the 7th IEEE conference on Consumer communications and networking conference
A logic based context query language
EuroSSC'10 Proceedings of the 5th European conference on Smart sensing and context
A Generative Programming Framework for Context-Aware CSCW Applications
ACM Transactions on Software Engineering and Methodology (TOSEM)
Civil engineering communication: obstacles and solutions
EG-ICE'06 Proceedings of the 13th international conference on Intelligent Computing in Engineering and Architecture
UCS'06 Proceedings of the Third international conference on Ubiquitous Computing Systems
Future Generation Computer Systems
A programmable context interface to build a context infrastructure for worldwide smart applications
EUC'05 Proceedings of the 2005 international conference on Embedded and Ubiquitous Computing
Distributed processing of context-aware authorization in ubiquitous computing environments
ICCSA'06 Proceedings of the 2006 international conference on Computational Science and Its Applications - Volume Part II
Ontology-Based user context management: the challenges of imperfection and time-dependence
ODBASE'06/OTM'06 Proceedings of the 2006 Confederated international conference on On the Move to Meaningful Internet Systems: CoopIS, DOA, GADA, and ODBASE - Volume Part I
Improving electronic health records retrieval using contexts
Expert Systems with Applications: An International Journal
A layered model for user context management with controlled aging and imperfection handling
MRC'05 Proceedings of the Second international conference on Modeling and Retrieval of Context
Designing the context matching engine for evaluating and selecting context information sources
MRC'05 Proceedings of the Second international conference on Modeling and Retrieval of Context
Dynamic and semantic web services composition for ubiquitous computing
Proceedings of the 18th Brazilian symposium on Multimedia and the web
Profile context management in ubiquitous computing
International Journal of Ad Hoc and Ubiquitous Computing
MultiS: A Context-Server for Pervasive Computing
Electronic Notes in Theoretical Computer Science (ENTCS)
DiaSuite: A tool suite to develop Sense/Compute/Control applications
Science of Computer Programming
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Pervasive computing applications are increasingly leveraging contextual information from several sources to provide users with behavior appropriate to the environment in which they reside. If these sources of contextual information are used and deployed in an ad hoc manner, however, they may provide overlapping functionality, fail to provide needed functionality, and require the use of inconsistent interfaces by applications. To overcome these problems, we introduce a Contextual Information Service that provides applications with contextual information via a virtual database. Unlike previous efforts, our service provides applications a consistent, lightweight, and powerful mechanism for obtaining contextual information, and includes explicit support for the on demand computation of contextual information. We show, via example applications and a Contextual Information Service prototype that we have implemented, how this approach can be used to allow proactive applications to adapt their behavior to match a user's current environment.