Abstract: To protect against the illegal distribution of files in peer-to-peer networks, a method includes activating simulated user terminals on several peer-to-peer networks by protection platforms connected at different points in the network, generating corrupted versions of files to be protected having features identical to those of the files to be protected, and making the corrupted versions available for sharing by means of at least one user terminal simulated by at least one of the protection platforms.

Abstract: A device for automatically converting a digital sample sequence X(n) inputted at a first frequency fe and converted into an output digital sample sequence Y(m) at a second frequency fs which is smaller than fe. An interpolator-decimator assembly having a decimation rate equal to &ggr;, selected so as to correspond to the frequency offset fe/fs is based on a polyphased filter having p tables of q elements each, said filter being designed such that samples X(n) are input at the fe frequency and table components are activated according to clocking of a second clock derived from the fe clock and wherein one clock pulse is removed.

Abstract: A device for automatically converting a digital sample sequence X(n) inputted at a first frequency fe and converted into an output digital sample sequence Y(m) at a second frequency fs which is smaller than fe. An interpolator-decimator assembly having a decimation rate equal to &ggr;, selected so as to correspond to the frequency offset fe/fs is based on a polyphased filter having p tables of q elements each, said filter being designed such that samples X(n) are input at the fe frequency and table components are activated according to clocking of a second clock derived from the fe clock and wherein one clock pulse is removed.

Abstract: The disclosed pair of hinges enables the visor to be swung with respect to the shell of the helmet in a complex motion that starts in a turned-down position by a motion of translation moving the visor away from the shell of the helmet in order to move it away from a shoulder or joint, if any, and continues up to a raised position by a rotation that retracts the visor over the shell of the helmet. They are synchronized mechanically by a system of gear wheels meshing with racks connected by a sheathed cable and being operated by just one hand by one of the handles with which it is fitted.