A method and apparatus for mechanically andor chemical-mechanically planarizing microelectronic substrates. The synthetic spilanthol composition can also contain, and at least one of -N–2,6,8-decatrienamide and \u2014N–2,6,8-decatrienamide, the -2,6,8-decatrienamide being present in amounts effective to impart a salivating or tingle effect while reducing the perception of off notes, as compared to the off-notes perceived upon consumption of natural spilanthol. The wind turbine is then controlled according to the control signal only if the variation parameter is below an alert threshold, and otherwise according to a modified control strategy. The patterned features have one or more patterned conducting layers.