FIGURE 2.

Schematic diagram of the data retrieval process. Motion and contact sensors transmit data via WiFi to a DreamPlug PC in each home, while the phone monitor data is transferred via USB. The DreamPlug transmits all the sensor data across a secure wireless connection to our servers each night. In addition, data from the personal computing device is encrypted and transmitted over the internet (represented as a cloud) to the secure servers. Data accessed from the server is time-aligned across subjects and used for analysis and interpretation.