The present invention provides a Scandium catalyst that can be used in water or water-soluble organic solvent with no leaching of Scandium. The drawers have a height such that this is a multiple of a predetermined dimension. A dummy electrode is provided between an electrode finger and a bus bar of an interdigital transducer of the SAW resonator. Then, the conductive pattern part 40 is pushed against both the wing surface panel 21A and the wing surface panel 21B by the fastening power of the fastener members 24, whereby electrical conduction between the wing surface panel 21A and the wing surface panel 21B can be achieved. Related methods are also provided. The variable geometry mechanism is actuated by a tubular linear electric motor comprising a fixed annular stator ring and an axially moveable annular forcer ring, arranged coaxially about the turbocharger axis.