A process for upgrading unconventional or heavy oils such as, tar sands, shale oil, or bitumen. Notably, a second variable capacitance is operably coupled to receive a control voltage from the steering line and located between the resonator and the active device. Eigenvalues for the eigenvectors of the matrices processed on signal samples recorded on horizontally polarized X arrays are compared to the eigenvalues for the eigenvectors of the covariance matrices processed on signal samples recorded on vertically polarized X arrays. A method for testing includes the steps of providing the interconnect having the switching network, and controlling test signals to the components using the switching network to perform various test procedures, such as functionality tests, parametric tests and burn-in tests. When data of at least one of the memory cells in the region is rewritten, data in the region is transferred from the inverters to the capacitors and then power of the inverters are turned off.