caa a22 4500 445821868 CHVBK 20180317145246.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s00779-010-0331-7 doi (NATIONALLICENCE)springer-10.1007/s00779-010-0331-7 COSAR: hybrid reasoning for context-aware activity recognition [Elektronische Daten] [Daniele Riboni, Claudio Bettini] Human activity recognition is a challenging problem for context-aware systems and applications. Research in this field has mainly adopted techniques based on supervised learning algorithms, but these systems suffer from scalability issues with respect to the number of considered activities and contextual data. In this paper, we propose a solution based on the use of ontologies and ontological reasoning combined with statistical inferencing. Structured symbolic knowledge about the environment surrounding the user allows the recognition system to infer which activities among the candidates identified by statistical methods are more likely to be the actual activity that the user is performing. Ontological reasoning is also integrated with statistical methods to recognize complex activities that cannot be derived by statistical methods alone. The effectiveness of the proposed technique is supported by experiments with a complete implementation of the system using commercially available sensors and an Android-based handheld device as the host for the main activity recognition module. Springer-Verlag London Limited, 2010 Activity recognition nationallicence Context awareness nationallicence Ontological reasoning nationallicence Riboni Daniele Università degli Studi di Milano, D.I.Co., Milan, Italy aut Bettini Claudio Università degli Studi di Milano, D.I.Co., Milan, Italy aut Personal and Ubiquitous Computing Springer-Verlag 15/3(2011-03-01), 271-289 1617-4909 15:3<271 2011 15 779 https://doi.org/10.1007/s00779-010-0331-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00779-010-0331-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Riboni Daniele Università degli Studi di Milano, D.I.Co., Milan, Italy aut NATIONALLICENCE 700 1- Bettini Claudio Università degli Studi di Milano, D.I.Co., Milan, Italy aut NATIONALLICENCE 773 0- Personal and Ubiquitous Computing Springer-Verlag 15/3(2011-03-01), 271-289 1617-4909 15:3<271 2011 15 779 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer