A method of patterning a porous dielectric material that includes an ash process to treat the porous dielectric material. Uses of the dispersed Cs-131 prepared by the method include cancer research and treatment, such as for the use in brachytherapy. Using the method, a wake-up packet pattern is defined in order to prevent the computer from being waked-up by an unnecessary packet transmitted through the network, and the computer enters the sleep mode again even if the computer is inevitably waked-up due to an operating manner of the network. 05 to 3% by weight of a copper-containing stabilizer or of a sterically hindered phenol or mixtures thereof,E) from 0 to 60% by weight of further additives,the sum of the percentages by weight of components A) to E) adding up to 100%.