This line studies the interactions between hadrons and of these with the nuclear medium, using effective theories built from symmetries of QCD, perturbative and non-perturbative methods. Special emphasis is put on topics related to the scientific programme of PANDA and CBM of the European Laboratory FAIR and on the study of the neutrino-nucleus cross-sections that are used in the experiments on neutrino oscillations (MiniBooNE, T2K…). Some aspects of Non-linear Dynamics and Complex Systems are also treated.