[1] Babes Bolyai Univ, Dept Phys, Cluj Napoca, Romania
[2] Goethe Univ Frankfurt, Inst Theoret Phys, Frankfurt, Germany
[3] Vidyasirimedhi Inst Sci & Technol, Sch Informat Sci & Technol, Bioinspired Robot & Neural Engn Lab, Rayong, Thailand
[4] Univ Southern Denmark, Maersk Mc Kinney Moller Inst, Embodied Artificial Intelligence & Neurorobot Lab, SDU Biorobot, Odense, Denmark