An insert for a rock bit that includes tungsten carbide particles, and a cobalt binder disposed around the particles, wherein a grain size of the tungsten carbide particles and a content of the cobalt binder are selected to provide a fracture toughness of at least about 18 ksi 0. A conductive layer is deposited on the bottom surface of its substrate to reflect the waves transmitted or received by the resonating structure of the antenna. The method further includes determining, by the first network node, a first summation of active sessions within the NLZ based in part on the first network access message and a number of active sessions currently processed by the first network node. In an example, the desulfurization material includes zinc oxide.