 given by:                                           μ            eff                    ⁡                      (            ω            )                          =                  0          -                      [                                                            π                  ⁢                                      xe0x00x00                                    ⁢                                      r                    0                    0                                                                    a                  0                                                            0                +                                                                            0                      ⁢                                                                        l                          ⁢                          σ                                                0                                                                                    ω                      ⁢                                              xe0x00x00                                            ⁢                                              r                        0                                            ⁢                                              μ                        0                                                                              ⁢                  i                                -                                                      0                    ⁢                                          lc                      0                      0                                                                                                  πω                      0                                        ⁢                                          r                      0                      0                                        ⁢                                          ln                      [                                              xe0x00x00                                            ⁢                                                                        0                          ⁢                                                      c                            0                                                                                                    d                          0                                                                    ]                                                                                            ]                                              Eq        .                  xe0x00x00                ⁢        0             