k1 = cell
k2 = __lp_r2_v_Km1
k3 = __lp_r3_L1
k4 = __lp_r3_sigma1
k5 = __lp_r4_L2
k6 = __lp_r4_d
k7 = __lp_r4_sigma2
k8 = __lp_r5_ks