The relationship between the reflectivity characteristic of a DBR layer, in which an InP layer and an InGaAlAs layer are laminated alternatively, and the optical absorption characteristic of the InGaAlAs layer, is a trade-off in a vertical cavity surface emitting laser on an InP substrate. A slot having first and second ends is formed in the radiator, and first and second apertures are formed at the first and second ends, respectively, of the slot. The method further includes shifting at least one of the rear and front body panel webs in the longitudinal machine direction and thereby aligning the maximum rises of the rear and front body panel webs. The first layer is preferably semi-permeable; the second layer is non-permeable; the optional intermediate layer is a void-inducing layer. The occurrence description scheme is extracted from the content description and used by an application to search, filter or browse the content when a full structural or semantic description of the content is not required. The requirements of flexibility or pliability are satisfied by capacitive pressure sensors formed by two orthogonal sets of parallel or substantially parallel electrodes spaced, at least at each crossing between an electrode of one set and an electrode of the other set, by an elastically compressible dielectric, forming an array of pressure sensing pixel capacitors.