Before revision:  segments of size m and n respectively for different chain length N  . The free parameters in the model are the bending rigidity \kappa_b which controls the three body interaction term, the elastic constant k_F in the FENE (bond)
After revision:  segments of size m and n respectively for different chain length N in two dimension (2D) . The free parameters in the model are the bending rigidity \kappa_b which controls the three body interaction term, the elastic constant k_F in the FENE (bond)