An airoil separator comprises a rotor and a casing surrounding the rotor. An operation of the input stage is simulated at various input parameter values of an input parameter at the input terminal to obtain corresponding extrinsic input timing delays associated with the input stage. The location data points are then processed using a signal processing algorithm, such as a Fourier transform algorithm, to derive a transfer function relating a position of the device to a movement vector for the actuation axis. The third corner does not carry one of the wind turbines. The computational device 15 utilizes said projection data and said mathematical modelling of the object in Bayesian inversion based on Bayes’ formulap\u2061=ppr\u2061\u2062ppr\u2061\u2062p\u2061p\u2061to produce three-dimensional information of the object. Methods of releasing additive compositions into liquid compositions are also provided.