Abstract: According to an example embodiment of the present invention, there is provided a method of controlling digital user rights on a mobile device comprising the computer implemented steps of running an application having a first set of digital user rights on a mobile device, wherein the first set of digital user rights have predetermined activation criteria associated therewith, obtaining, by the mobile device, proximity data about the proximity of at least one secondary device, determining, based on at least the obtained proximity data and the predetermined activation criteria, a digital user right to be activated, and activating the determined digital user right.

Abstract: Method of producing biocides from an aqueous flow of process water, said method comprising the step of subjecting a water flow containing ions which give rise to conductivity through an electrolysis cell in order to generate chemicals with biocidal performance. The method can be used for treating fresh and waste water systems, such as water streams of cooling systems, fermentation, mining and biorefining, for example papermaking process waters. It can be used for reducing halogen concentration.