Abstract: Electronic devices with user interfaces, including but not limited to systems and methods for modifying screen content within a graphical user interface based upon user inputs are provided. Methods for providing visual lessons on an electronic device are provided. Such methods can involve one or more levels, with each level comprising one or more teaching concepts, and a number of levels corresponding to a course. These concepts can correspond to subtopics within an overall course subject. A user of an electronic device can be required to learn and master one or more concepts in a particular order, or in other instances the individual concepts within a level can be navigated in alternative sequences as specified by configurable program code of the technology. Lessons can be linked within an over-all story.

Abstract: A mechanism to support the head of a patient is provided for therapeutic beds, including prone positioning therapeutic beds. In one embodiment, a head restraint apparatus is provided comprising a casing having a closed bottom end, an open top end, and an open front end. The casing encloses a cavity for receiving a person's head resting in a supine position and substantially encompasses the back and sides of a person's head. A face piece removably attached to the open top end of the casing is configured to restrain at least a portion of the front of a person's head. In another embodiment, a head restraint is slidably mounted on a transversely oriented rail of the patient support platform. A manually operable clamp is provided to fix the position of the head restraint with respect to the rail.

Abstract: An optical motion and angle sensor comprising a chamber, a light source for emitting light into a first half of the chamber along an axis of the chamber, and a plurality of light detectors for receiving light exiting from a second half of the chamber, at an angle relative to the axis of the chamber. When applied as a motion sensor, the sensor facilitates discrimination between various types of motion, and specifically allows the discrimination of slight normal motion from motion associated with incapacity of a person wearing the sensor. In addition, the sensor can provide this discrimination regardless of orientation. When applied as an angle sensor, the sensor facilitates the detection of the angle of inclination of the sensor relative to an axis, as well as the direction of the inclination.