A high-rise building is described, which comprises a building structure with floor structures, a double-skin facade comprising a first skin and a second skin. The cartridge includes a hollow body and a dispensing tube that contains a pumping device. The decoupling is achieved, in part, by time multiplexing the underlying hardware PMU registers to provide a greater number of virtualized PMU registers than the number of hardware-PMU registers provided by at least some of the underlying hardware PMUs. A commutator manufactured according to the method and an electric motor incorporating the commutator are also disclosed.