Abstract: The invention relates to a method for maintaining an equilibrium of a physico-chemical parameter of a medium, and for recovering the equilibrium in case of loss of the latter. More precisely the method makes it possible to estimate the relevance of a corrective action on the medium in order to recover an equilibrium. The method is implemented by the processing unit of a system for regulating the medium. The invention applies in a non-limiting manner to the regulation of the equilibrium of the bathing water of a swimming pool.

Abstract: The invention relates to a method for maintaining an equilibrium of a physico-chemical parameter of a medium, and for recovering the equilibrium in case of loss of the latter. More precisely the method makes it possible to estimate the relevance of a corrective action on the medium in order to recover an equilibrium. The method is implemented by the processing unit of a system for regulating the medium. The invention applies in a non-limiting manner to the regulation of the equilibrium of the bathing water of a swimming pool.

Abstract: Techniques for delivering advertisements and similar promotional messages to mobile users using USSD technology are disclosed. USSD provides session-based communication in which transactions occur only during a session. Advertisements may be delivered through USSD in several ways: by inserting a short text into a message in a mobile-initiated USSD session, by temporarily diverting a mobile-initiated USSD session toward an advertisement sub-session, by triggering a network-initiated USSD session the main purpose of which is the delivery of an advertisement, and by causing a mobile user to initiate a USSD session the main purpose of which is the delivery of an advertisement. Also disclosed is a process for inserting advertisements into USSD messages, a process for inserting advertisement sub-sessions into USSD sessions, and a process for delivering advertisements with network-initiated USSD sessions.

Abstract: The present invention contemplates a variety of techniques for delivering advertisements and similar promotional messages to mobile users through the Unstructured Supplementary Service Data (USSD) bearer in the GSM (Global System for Mobile) network or the 3G (3rd Generation) network. The USSD is a GSM and 3G communication technology that is used to send text between a mobile phone and an application program in the network. USSD provides session-based communication in which transactions occur only during a session. Advertisements delivered through USSD provide a way for the recipient to respond to the promotional message immediately and often at no cost, as many mobile networks do not bill mobile users for their USSD traffic.