A method of mounting an accelerometer to an internal combustion engine comprises securing the accelerometer to a mating surface on an engine component external to a combustion chamber where the accelerometer can generate a signal output that is characteristic of engine knock, when it occurs, and at least one other combustion behavior inside the combustion chamber during a combustion event. The system utilizes Internet client-server technology. Said primary processing means are adapted to be distributed and comprise first primary processing means provided in the managing system and a number of second primary processing means provided in a number of managed systems. Each of the client computers comprises: a recording module, a file creating module, a file obtaining module, and a determining module. The present invention also provides compositions and methods to evaluate the susceptibility of a organisms to antimicrobial agents. The arcuate sections increase the amount of wear in the notches that can be tolerated before a potential seal lock-up, thus increasing seal assembly lifetime.