Abstract: The invention relates to a method and system for recording and billing of services during roaming of a mobile IP node (20) in heterogeneous WLANs, in which first call detail records are transmitted from an access server (23/1001) to a billing module (1003) and second call detail records from the access server to a proxy module (1002). By means of a clearing module (1004), the obtained service is billed (1016) at a provider (1008) of a fixed network (1007) and/or TAP files (1017) are transmitted to a GSM (1005) service provider (1006) for billing.

Abstract: A creping blade including a body having a leading side, a trailing side, and working end including a bevel surface. The bevel surface is defined by a leading edge and a trailing edge, wherein the trailing edge of the creping blade has a trailing edge radius of greater than about 0.001 inches (about 0.0254 mm).

Abstract: A modular ozone generator includes an ultraviolet (UV) lamp within a chamber for converting some of the oxygen molecules in air to ozone molecules. The air is introduced through an inlet at a high point of the chamber and discharged through an outlet at a low point of the chamber to increase the percentage of ozone discharged due to the higher density ozone molecules migrating downwardly. A second or more ozone generator modules are beneath the first ozone generator module with an interlocking mechanism to align the outlet of an upper ozone generator with the inlet of a lower ozone generator module. The number of cascaded ozone generator modules forming a vertical stack is a function of the concentration (and amount) of ozone molecules sought to be generated. Readily removable end caps for each ozone generator module accommodate repair and replacement of any and all internal components with or without dismounting the ozone generator module from its supporting structure.

Abstract: A modular ozone generator includes an ultraviolet (UV) lamp within a chamber for converting some of the oxygen molecules in air to ozone molecules. The air is introduced through an inlet at a high point of the chamber and discharged through an outlet at a low point of the chamber to increase the proportion of ozone molecules relative to the oxygen molecules discharged due to the higher density ozone molecules migrating downwardly. The introduced air is conveyed through a diffuser to provide multiple streams of air flowing about the lamp to enhance irradiation of the oxygen molecules and form ozone molecules. A second or more ozone generator modules are beneath the first ozone generator module with an interlocking mechanism to align the outlet of an upper ozone generator with the inlet of a lower ozone generator module. The number of cascaded ozone generator modules forming a vertical stack is a function of the concentration (and amount) of ozone molecules sought to be generated.

Abstract: A method for cleaning a pool surface is carried out by structure having a protruding nozzle assembly mounted in a side wall of a swimming pool in communication with a source of water for ejecting through a nozzle of a nozzle housing a stream of water at a predetermined angle relative to the adjacent side wall surface. During each erection and retraction of the nozzle housing precipitated by initiation and cessation of water flow to the nozzle assembly, the nozzle housing rotates incrementally to provide a plurality of streams of water defining a fan-like area from each nozzle as such nozzle comes into fluid communication with an opening in a cover enclosing the nozzle housing. Each nozzle is canted to a different angle above the adjacent pool surface to assist in cleaning sloping parts of the side wall/bottom surface junction and to assist in cleaning any adjacent structures extending from the side wall.