2.1/ definition
2.2/ historical
2.3/ taught bases
2.3.1/ the ohm law
2.3.2/ electric charge
2.3.3/ constant, practical but
simplistic
2.3.4/ intensity and voltage
2.3.5/ frequency and period
2.3.6/ currents
classification
2.3.7/ constant current
or constant voltage ?
2.3.8/ eletrodes and current
density
2.4/ necessary bases
2.4.1/ the human impedance
2.4.2/ a more complex model
2.4.3/ the du/dt solution
2.4.4/ a
bad system
2.4.5/ the signal
theory
2.4.6/ the discrete fourier
transform
2.4.7/ the
winning values
