An electrical machine has a core that includes stranded magnetically permeable material. The restrictor assembly may be positioned to permit the smelt to flow, unrestricted, from the recovery boiler to the dissolving tank, or the restrictor assembly may be positioned so as to fully or partially block the smelt flow from the boiler to the dissolving tank. The passage is arranged to receive a heat transfer fluid flow during use and the upstanding formation is arranged to induce separation of a boundary layer portion of said heat transfer fluid flow from the base in use. Re-programmability of the PLD provides significant flexibility in providing features that can be parameterized based on the user’s needs andor associated design. The one or more user preference profiles are provided to an application server. The novel compounds are suitable for the treatment of a state connected with oxygen deficit andor energy deficit, or a disease based on PARP inhibition, especially an autoimmune or neurodegenerative disease, andor a viral disease, andor a disease caused by a toxic effect.