An LED with improved current spreading structures that provide enhanced current injection into the LED’s active layer, improving its power and luminous flux. A method includes positioning a high dielectric or high permeability element suspended in a low dielectric or low permeability fluid contained between a pair of charged electrode plates or a magnetic gap; determining a change in capacitance or inductance of the apparatus; and determining from the capacitance change or inductance change a magnitude of the acceleration. Said MMI waveguide having a length, in light propagating direction, so that an image at the i:th, i\u2266N access waveguide propagating into said MMI waveguide will produce N self-images at a second side opposite to said first side, where N is an integer than 1. An inverted version of a second internal clock signal and the second internal clock signal are supplied to gates of the first and second pairs of pMOS transistors. The taxpayer can file a tax declaration with the tax agency electronically. The rotor is coupled to the stator.