Disclosed herein are systems, methods, and non-transitory computer-readable storage media for managing free chains of compute resources. The operating handle having a cam that when rotated from the ON position to the OFF position forces a cam follower downwards. Accordingly, the humidification requirements to a fuel cell stack in an operating system are reduced. Interference characteristics for a line are determined based on the model and actual signals carried on other communication lines different from the line for which the characteristics are being determined.