Modulated signal A is transmitted from a first antenna, and modulated signal B is transmitted from a second antenna. The plenum box comprises a pressure distribution pipe which is disposed in an inlet to the plenum box and which itself comprises a regulating damper, and an outlet. A handoff of the project from a source node to a destination node in the complex event processing cluster is coordinated by a manager without losing messages and without relying on a message guarantee delivery protocol. The source is configured to couple excitation radiation into the substrate such that it is waveguided within the substrate by total internal reflection. In this manner, the honeycomb extrusion die is obtained.