nu_c_table = [
            [1.908, 1.908, 1.908, 1.908, 1.908],
            [1.914, 1.915, 1.916, 1.918, 1.921],
            [1.921, 1.922, 1.927, 1.936, 1.947],
            [1.927, 1.930, 1.943, 1.961, 1.987],