In the joint 40 for duplex pipes, a clearance between the first outer pipe seal unit 110 and the second outer pipe seal unit 210 is defined larger than a clearance existing between the first inner seal portion 120 and the second inner pipe unit 220. More specifically, the system provides the capability to determine the \u201cbest\u201d weather information by evaluating the weather data and associated weather quality, accuracy or confidence attribute values against subscriber operations and requirements. The method comprises: exposing the substrate to a source gas; exposing the substrate to a modification gas comprising an oxidizing gas or a nitriding gas, wherein an atom has electronegativity different from that of another atom in molecules of the oxidizing gas or the nitriding gas; and exposing the substrate to a catalyst. The process of assembling the modular germicidal system may comprise mounting the electric discharge lamp fixture to the other electric discharge lamp fixture, wherein the electric discharge lamp fixture receives substantial mechanical support solely from at least the other electric discharge lamp fixture. The Listener object can define a method to be called upon the occurrence of the event.