FIG. 7A illustrates a system that uses a cron-based silent push notification to trigger collection of sensor data in accordance with the disclosed embodiments.

FIG. 7B illustrates a system that uses an adaptive notification server to trigger collection of sensor data in accordance with the disclosed embodiments.

FIG. 8A illustrates a system that triggers collection of sensor data based on activity detection in accordance with the disclosed embodiments.

FIG. 8B illustrates a system that uses a beacon device to trigger collection of sensor data in accordance with the disclosed embodiments.

FIG. 8C illustrates a system that uses an active beacon device to trigger collection of sensor data based on feedback from a learner in accordance with the disclosed embodiments.

FIG. 8D illustrates a system that uses a commercial wireless beacon to trigger collection of sensor data in accordance with the disclosed embodiments.

FIG. 8E illustrates a system that triggers collection of sensor data using a geofencing API in accordance with the disclosed embodiments.