A look-alike substitute for a cigarette, from which a smokeless aroma of burning tobacco or other fragrances can be inhaled and a smoke-simulating aromatized powder can be emitted out, comprises a first chamber lined with a scratch-releasable, flavor-coated insert and a second chamber filled with micrometric powder. The first current is added to a second current during a first sensing time and subtracted from a third current during a second sensing time. One system for applying the floor finish can comprise a source of aqueous floor finish and an applicator wand comprising an application nozzle and application surface. A receiver box receives the first laser signal portion, shifts the frequency of the first laser signal portion outputs the modified optical signal, and outputs an electrical signal on the basis of the laser signal. The number of high permeability metal lines includes composite hexaferrite films. The invention compensates for the errors which arise from the relative movement of turbine blade tips by deriving a correction factor for each blade and continually updating that correction factor.