The present invention relates to a cellular radio communications system and especially a method, a mobile station and a base station for a smooth hard handover. A refresh transistor has a source coupled to one of the plurality of bitlines, a control gate coupled to a dynamic random access memory wordline and a drain. The sample can be repeatedly or continuously extracted with one or more solvents to remove a greater amount of impurities. Desirably, the films also contain a pharmaceutical andor cosmetic active agent with no more than a 10% variance of the active agent pharmaceutical andor cosmetic active agent per unit area of the film. Push-button activation and automatic extension based on ring-detection are disclosed. The at least one histogram is compared to multiple spectral images associated with known materials.