7. Activities of daily living

Inactive periods can also provide useful information about human activity . The duration of sleep periods is probably the first example, with the possibility that an abnormally long period of inactivity could generate an alarm. This time, the activity log file (date-time-event) is first converted into a list of successive intervals between two detections. This time series is divided into separate sequences for each room, in order to distinguish activities that are different in each room (e.g. activity levels in the bedroom are different from those in the bathroom). In the AILISA project, data were recorded over a two-month period in one of the private...