A prosthetic lock assembly of the ratchet type for connecting a liner for a prosthetic socket to a prosthesis. The apparatus and methods of the present invention identify unbound fixed priority threads at the top of local run queues. The openings of the air flow control valves are controlled in an interlocked manner by the controller in such a way that the signal representing turbidity shows that the treatment water within the confirmation tank is whitely turbid. The trace data can be retrieved and analyzed to identify and address the problem. The messages may be sent and exchanged between users, as well as collected, liked or commented on.