An orthotic device for limiting abduction of the legs of a wearer includes first and second flexible bands for attachment to the legs of the wearer. The system employs a camera system, including a pantiltzoom camera and one or more depth cameras, to automatically locate occupants in a room and adjust the PTZ camera’s pan, tilt, and zoom settings to focus in on the occupants and center them in the main video frame. A normally-open first switch is associated with the latch and connects the first data stream to the first sensing input other than when the latch is released, and a normally-open second switch is associated with the door and serves to connect the second data stream to the second sensing input so long as the door remains closed. The distance between the gate electrode and the carbon nanotube array is mainly controlled by the thickness of the intermediate layer. The operative surface of the transducer may be annularly shaped to encircle the wound to convey the ultrasound andor reflected ultrasound thereto. Susceptibility to certain cancers has been shown to be causatively related to the deletion of, or polymorphisms in, the CDK4I gene.