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1.2 COMPUTER AND INFORMATION SCIENCE
Activity recognition has mainly focused to date on identifying repetitious and/or clearly delineated events. Our experience, drawing on many years’ research in smart and sensorised systems, leads us to observe that many (if not most) interesting activities fall into a different category: sporadically occurring and poorly differentiated from other concurrent activities. This implies that decision-making remains uncertain across the entire system, and suggests that progress would be greatly supported by standard evaluation methodologies and data sets.
Juan Ye, Lorcan Coyle, Susan McKeever, and Simon Dobson (2010). Dealing with activities with diffuse boundaries. Proceedings of Pervasive 2010 workshop on How to do good activity recognition research? Experimental methodologies, evaluation metrics, and reproducibility issues . Helsinki, Finland. May 17-21, 2010