Abstract: The invention concerns a device for purifying a gas effluent containing contaminants, comprising: a reactor including at least an inlet for the gas to be purified and at least an outlet for the purified gas ; at least an ultraviolet or visible radiation source; and at least a support element arranged inside the reactor and coated with a catalyst forming an exposed catalytic surface capable of oxidising at least partly the contaminants under the action of the ultraviolet or visible radiation. The reactor comprises at least two obstructing means, each of said obstructing means obstructing partly the flow of the gas effluent from said inlet up to said outlet and generating a turbulent gas zone on its downstream side, and a catalytic surface is arranged in each turbulent gas zone so that the turbulent gas flow is incident on said catalytic surface.

Abstract: A process for dynamic management of subscription data for a terminal in a “prepaid” mode as part of a telecommunication network, in which a customer in possession of, or using, the terminal acquires two numbers for activating the terminal and/or crediting the terminal account. The two numbers could be acquired from a pre-paid card, for example, with the numbers hidden until a covering is scratched off by the users. The terminal must be activated on the network by first entering a authentication key, whereby the terminal obtains an identity on the network. The customer can then add an account number that creates and/or credits the terminal account on the network, whereby the terminal obtains a call number from the network. The customer can add credit to his account by purchasing additional pre-paid cards.