This paper presents a probabilistic approach for the identification of abnormal behaviour in Activities of Daily Living (ADLs) from dense sensor data collected from 30 participants. The ADLs considered are related to preparing and drinking (i) tea, and (ii) coffee. Abnormal behaviour identified in the context of these activities can be an indicator of a progressive health problem or the occurrence of a hazardous incident.The approach presented considers the temporal and sequential aspects of the actions that are part of each ADL and that vary between participants.The average and standard deviation for the duration and number of steps of each activity are calculated to define the average time and steps and a range within which a behaviour could be considered as normal for each stage and activity. The Cumulative Distribution Function (CDF) is used to obtain the probabilities of abnormal behaviours related to the early and late completion of activities and stages within an activity in terms of time and steps. Analysis shows that CDF can provide precise and reliable results regarding the presence of abnormal behaviour in stages and activities that last over a minute or consist of many steps. Finally, this approach could be used to train machine learning algorithms for abnormal behaviour detection.
|Title of host publication||2019 IEEE SmartWorld, Ubiquitous Intelligence & Computing, Advanced & Trusted Computing, Scalable Computing & Communications, Cloud & Big Data Computing, Internet of People and Smart City Innovation (SmartWorld/SCALCOM/UIC/ATC/CBDCom/IOP/SCI)|
|Number of pages||8|
|Publication status||Published - 9 Apr 2020|
|Event||IEEE International Conference on Ubiquitous Intelligence and Computing - Leicester, United Kingdom|
Duration: 19 Aug 2019 → 23 Aug 2019
Conference number: 16
|Name||Proceedings - 2019 IEEE SmartWorld, Ubiquitous Intelligence and Computing, Advanced and Trusted Computing, Scalable Computing and Communications, Internet of People and Smart City Innovation, SmartWorld/UIC/ATC/SCALCOM/IOP/SCI 2019|
|Conference||IEEE International Conference on Ubiquitous Intelligence and Computing|
|Abbreviated title||UIC 2019|
|Period||19/08/19 → 23/08/19|
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- Activities of Daily Living, ADLs
- Cumulative Distribution Function, CDF
- Probabilistic Analysis