A concentrator for increasing the particle concentration in an aerosol flow is described. Thus, a retrieving process can be performed at a high speed, and the security can be improved. The SR noise-enhanced detection and classification schemes can improve any algorithms and systems. Information relating to the device may be outputted visually or auditorily to an individual. A second actuator is coupled to the housing and configured to output a second haptic effect to the housing upon receiving a second activating signal from the processor. The system includes a plate element positionable on the long bone substantially opposite the head portion of the long bone and on a first side of the fracture, and a post coupled to the plate and into the head portion of the bone and across the fracture.