A system including communications means, an application server and a gateway between the communication means and the application server is adapted to effect communications with terminals in relation to services offered by said application server, each communication being effected via said communications means using a bearer service between a terminal and said gateway. The core layer comprises a core resin material and a filler material. A battery is removably disposed within the compartment. The compensation module includes a second branch for obtaining a second thresholding to extract from the first thresholding signal a second low-level signal due to the dispersion of the electric resistances of the heat detectors andor to the fluctuations in the temperature of the focal plane of the detection module. Smooth transition between sourcing and recuperation is possible by allowing an active load to control the output voltage until the correct control circuit begins regulation. A prognostic index is calculated by measuring nuclear pleomorphic features in a patient, and multiplying the observed values by the corresponding selected coefficients.