Embodiments of the present invention include systems and methods for detecting failure of node, link, or both, in a network. The assembly includes a piston head having an upper combustion wall with an undercrown surface and a ring belt region. The weight ratio of CO2 to the carbonaceous fuel is less than 0. In other embodiments, the golf club head comprises a weight bar disposed within the hollow body proximate the face component, and the weight bar bridges at least a portion of the sole.