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The three dimensions used to characterize each feature and the different factors in each of the dimensions.
| Dimension | Factor |
|---|---|
| Modality | Acceleration, app usage, call, SMS, screen on/off, location, conversation, sleep, light, sound |
| Periodicity | Ultradian, circadian, infradian rhythms |
| Time-window | Previous 2, 4, 6, 8, 10, 12 and 14 days |
