A photoresist composition includes a base polymer, a polymer and an acid generator. The waste water is discharged in a headwork screen for removing large solids in the water. Each agent is adapted to collect information relating to at least one of the computers. Joist assemblies can be assembled using joist segments, joist spacers, and fasteners. The amount of bandwidth assigned to the type of service may be governed by the equipment according to the assigned SSID. The invention proposes a solution for eliminating the noise of various origins in the wobble signal, notably the high frequency data leakage into the wobble signal due to radial asymmetry introduced in the diffraction pattern on the detector, whatever the reason for this radial asymmetry.