{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,22]],"date-time":"2026-01-22T19:56:15Z","timestamp":1769111775816,"version":"3.49.0"},"reference-count":44,"publisher":"Emerald","issue":"4","license":[{"start":{"date-parts":[[2009,11,20]],"date-time":"2009-11-20T00:00:00Z","timestamp":1258675200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.emerald.com\/insight\/site-policies"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2009,11,20]]},"abstract":"<jats:sec><jats:title content-type=\"abstract-heading\">Purpose<\/jats:title><jats:p>This paper aims to serve two main purposes. In the first instance it aims to it provide an overview addressing the state\u2010of\u2010the\u2010art in the area of activity recognition, in particular, in the area of object\u2010based activity recognition. This will provide the necessary material to inform relevant research communities of the latest developments in this area in addition to providing a reference for researchers and system developers who ware working towards the design and development of activity\u2010based context aware applications. In the second instance this paper introduces a novel approach to activity recognition based on the use of ontological modeling, representation and reasoning, aiming to consolidate and improve existing approaches in terms of scalability, applicability and easy\u2010of\u2010use.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Design\/methodology\/approach<\/jats:title><jats:p>The paper initially reviews the existing approaches and algorithms, which have been used for activity recognition in a number of related areas. From each of these, their strengths and weaknesses are discussed with particular emphasis being placed on the application domain of sensor enabled intelligent pervasive environments. Based on an analysis of existing solutions, the paper then proposes an integrated ontology\u2010based approach to activity recognition. The proposed approach adopts ontologies for modeling sensors, objects and activities, and exploits logical semantic reasoning for the purposes of activity recognition. This enables incremental progressive activity recognition at both coarse\u2010grained and fine\u2010grained levels. The approach has been considered within the realms of a real world activity recognition scenario in the context of assisted living within Smart Home environments.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Findings<\/jats:title><jats:p>Existing activity recognition methods are mainly based on probabilistic reasoning, which inherently suffer from a number of limitations such as <jats:italic>ad hoc<\/jats:italic> static models, data scarcity and scalability. Analysis of the state\u2010of\u2010the\u2010art has helped to identify a major gap between existing approaches and the need for novel recognition approaches posed by the emerging multimodal sensor technologies and context\u2010aware personalised activity\u2010based applications in intelligent pervasive environments. The proposed ontology based approach to activity recognition is believed to be the first of its kind, which provides an integrated framework\u2010based on the unified conceptual backbone, i.e. activity ontologies, addressing the lifecycle of activity recognition. The approach allows easy incorporation of domain knowledge and machine understandability, which facilitates interoperability, reusability and intelligent processing at a higher level of automation.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Originality\/value<\/jats:title><jats:p>The comprehensive overview and critiques on existing work on activity recognition provide a valuable reference for researchers and system developers in related research communities. The proposed ontology\u2010based approach to activity recognition, in particular the recognition algorithm has been built on description logic based semantic reasoning and offers a promising alternative to traditional probabilistic methods. In addition, activities of daily living (ADL) activity ontologies in the context of smart homes have not been, to the best of one's knowledge, been produced elsewhere.<\/jats:p><\/jats:sec>","DOI":"10.1108\/17440080911006199","type":"journal-article","created":{"date-parts":[[2009,12,5]],"date-time":"2009-12-05T07:16:15Z","timestamp":1259997375000},"page":"410-430","source":"Crossref","is-referenced-by-count":188,"title":["Ontology\u2010based activity recognition in intelligent pervasive environments"],"prefix":"10.1108","volume":"5","author":[{"given":"Liming","family":"Chen","sequence":"first","affiliation":[]},{"given":"Chris","family":"Nugent","sequence":"additional","affiliation":[]}],"member":"140","reference":[{"key":"key2022021720455266200_b1","doi-asserted-by":"crossref","unstructured":"Akdemir, U., Turaga, P. and Chellappa, R. 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