Abstract: Monitoring and action related to an end user's sleep activity may be provided by a system, device, and associated methods to monitor an end user's heart activity. A ballistocardiograph (BCG) signal may be detected by a physiological sensor that is not in contact with the end user. The BCG signal may be used to determine one of a plurality of sleep related statuses and health. Reports, alerts, and control of local electronic devices may be performed by a remote computer server and analysis engine that process the BCG signal.

Abstract: Optical signals are transmitted across a rotary junction using an active optical rotary coupler. A rotary optical joint assembly includes a rotatable optical coupler and an optical signal processing system. The rotatable optical coupler aligns two optical fibers for optical communication across a rotary optical junction. The optical signal processing system includes a local optical transceiver that receives the signals and compensates for at least a portion of signal loss or other signal imperfections incurred from transmitting the signal across the rotary optical junction. The local optical transceiver also processes the signals for longer distance transmission.