Charting past, present, and future research in ubiquitous computing
ACM Transactions on Computer-Human Interaction (TOCHI) - Special issue on human-computer interaction in the new millennium, Part 1
Combining the Self-Organizing Map and K-Means Clustering for On-Line Classification of Sensor Data
ICANN '01 Proceedings of the International Conference on Artificial Neural Networks
A survey of research on context-aware homes
ACSW Frontiers '03 Proceedings of the Australasian information security workshop conference on ACSW frontiers 2003 - Volume 21
Layered Representations for Human Activity Recognition
ICMI '02 Proceedings of the 4th IEEE International Conference on Multimodal Interfaces
What Shall We Teach Our Pants?
ISWC '00 Proceedings of the 4th IEEE International Symposium on Wearable Computers
An HMM-Based Approach for Gesture Segmentation and Recognition
ICPR '00 Proceedings of the International Conference on Pattern Recognition - Volume 3
Towards a Theory of Context Spaces
PERCOMW '04 Proceedings of the Second IEEE Annual Conference on Pervasive Computing and Communications Workshops
Inferring Activities from Interactions with Objects
IEEE Pervasive Computing
Introduction to sensing-based interaction
ACM Transactions on Computer-Human Interaction (TOCHI)
Recognition of Composite Human Activities through Context-Free Grammar Based Representation
CVPR '06 Proceedings of the 2006 IEEE Computer Society Conference on Computer Vision and Pattern Recognition - Volume 2
Activity Recognition of Assembly Tasks Using Body-Worn Microphones and Accelerometers
IEEE Transactions on Pattern Analysis and Machine Intelligence
Computer
Structural Learning of Activities from Sparse Datasets
PERCOM '07 Proceedings of the Fifth IEEE International Conference on Pervasive Computing and Communications
Recognition of dietary activity events using on-body sensors
Artificial Intelligence in Medicine
Activity sensing in the wild: a field trial of ubifit garden
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
HARMONI: Context-aware Filtering of Sensor Data for Continuous Remote Health Monitoring
PERCOM '08 Proceedings of the 2008 Sixth Annual IEEE International Conference on Pervasive Computing and Communications
Activity-Aware Computing for Healthcare
IEEE Pervasive Computing
IEEE Pervasive Computing
The Mobile Sensing Platform: An Embedded Activity Recognition System
IEEE Pervasive Computing
Wearable Activity Tracking in Car Manufacturing
IEEE Pervasive Computing
Accurate activity recognition in a home setting
UbiComp '08 Proceedings of the 10th international conference on Ubiquitous computing
Gestures are strings: efficient online gesture spotting and classification using string matching
Proceedings of the ICST 2nd international conference on Body area networks
Evidential fusion of sensor data for activity recognition in smart homes
Pervasive and Mobile Computing
Context-Aware Activity Recognition through a Combination of Ontological and Statistical Reasoning
UIC '09 Proceedings of the 6th International Conference on Ubiquitous Intelligence and Computing
Using situation lattices in sensor analysis
PERCOM '09 Proceedings of the 2009 IEEE International Conference on Pervasive Computing and Communications
PERCOM '09 Proceedings of the 2009 IEEE International Conference on Pervasive Computing and Communications
CIGAR: concurrent and interleaving goal and activity recognition
AAAI'08 Proceedings of the 23rd national conference on Artificial intelligence - Volume 3
IJCAI'75 Proceedings of the 4th international joint conference on Artificial intelligence - Volume 1
Common sense based joint training of human activity recognizers
IJCAI'07 Proceedings of the 20th international joint conference on Artifical intelligence
Training conditional random fields using virtual evidence boosting
IJCAI'07 Proceedings of the 20th international joint conference on Artifical intelligence
An Event-Driven Approach to Activity Recognition in Ambient Assisted Living
AmI '09 Proceedings of the European Conference on Ambient Intelligence
Temporal task footprinting: identifying routine tasks by their temporal patterns
Proceedings of the 15th international conference on Intelligent user interfaces
Learning situation models for providing context-aware services
UAHCI'07 Proceedings of the 4th international conference on Universal access in human-computer interaction: ambient interaction
Discovering Activities to Recognize and Track in a Smart Environment
IEEE Transactions on Knowledge and Data Engineering
COSAR: hybrid reasoning for context-aware activity recognition
Personal and Ubiquitous Computing
Activity knowledge transfer in smart environments
Pervasive and Mobile Computing
Recognizing interleaved and concurrent activities: A statistical-relational approach
PERCOM '11 Proceedings of the 2011 IEEE International Conference on Pervasive Computing and Communications
Activity recognition using hierarchical hidden markov models on a smartphone with 3D accelerometer
HAIS'11 Proceedings of the 6th international conference on Hybrid artificial intelligent systems - Volume Part I
Complex activity recognition using context driven activity theory in home environments
NEW2AN'11/ruSMART'11 Proceedings of the 11th international conference and 4th international conference on Smart spaces and next generation wired/wireless networking
Pervasive and Mobile Computing
Unsupervised discovery of structure in activity data using multiple eigenspaces
LoCA'06 Proceedings of the Second international conference on Location- and Context-Awareness
Using context to reveal factors that affect physical activity
ACM Transactions on Computer-Human Interaction (TOCHI)
Transferring knowledge of activity recognition across sensor networks
Pervasive'10 Proceedings of the 8th international conference on Pervasive Computing
A Knowledge-Driven Approach to Activity Recognition in Smart Homes
IEEE Transactions on Knowledge and Data Engineering
A comparative evaluation of finger and pen stroke gestures
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
IEEE Transactions on Systems, Man, and Cybernetics, Part A: Systems and Humans
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In pervasive and ubiquitous computing systems, human activity recognition has immense potential in a large number of application domains. Current activity recognition techniques (i) do not handle variations in sequence, concurrency and interleaving of complex activities; (ii) do not incorporate context; and (iii) require large amounts of training data. There is a lack of a unifying theoretical framework which exploits both domain knowledge and data-driven observations to infer complex activities. In this article, we propose, develop and validate a novel Context-Driven Activity Theory (CDAT) for recognizing complex activities. We develop a mechanism using probabilistic and Markov chain analysis to discover complex activity signatures and generate complex activity definitions. We also develop a Complex Activity Recognition (CAR) algorithm. It achieves an overall accuracy of 95.73% using extensive experimentation with real-life test data. CDAT utilizes context and links complex activities to situations, which reduces inference time by 32.5% and also reduces training data by 66%.