Rheumatology curriculum: passport to the future successful handling of the musculoskeletal burden?

A perimeter security system for providing a security alarm for people leaving or entering a predetermined area. The perimeter security system includes a main sensor unit, wearable by a user, which provides an alarm if the wearer breaks a boundary of the predefined area; a perimeter defining assembly for providing an indication of the boundary of the predefined area; and a remote unit for receiving a signal from the main sensor unit that the boundary of the predefined area has been broken, which provides an alarm for a caretaker.