Various methods and systems are provided for varying valve timing in a V-engine. During operation of the wind turbine, pressurized working fluid in the hydraulic system is blocked from being supplied to the brake. The floating gate, disposed over the substrate and insulated from the substrate, has a plurality of hut structures. The conformation of the distribution histograms of the spectral coefficients provides a parameter which, combined with the local estimators, provides weighted local estimators, which contain spectral information useful in the identification of specific structures in the organ subjected to ultrasound analysis. The nonmagnetic metal underlayer has a second hardness with respect to the pole trim.