Mode | Kalnins [26] | Navaratna [28] | Greene et al. [30] | Cohen | Gautham and Ganesan [32] | Buchanan and Rich [33] | Present theory |
1 | 0.962 | 0.963 | 0.974 | 0.959 | - | 0.956 | 0.981 |
2 | 1.334 | 1.338 | 1.338 | 1.325 | 1.315 | 1.308 | 1.412 |
3 | - | 1.653 | 1.652 | 1.646 | 1.639 | 1.612 | 1.646 |
4 | 2.128 | 2.131 | 2.162 | - | - | 2.044 | 2.038 |
5 | - | 2.141 | - | - | - | 2.059 | 2.115 |
6 | 3.176 | 3.185 | - | - | - | 2.965 | 2.934 |
7 | 3.988 | 3.933 | - | - | - | 3.837 | 3.871 |
8 | - | 4.159 | - | - | - | 4.000 | 4.017 |
9 | 4.575 | 4.601 | - | - | - | 4.148 | 4.138 |
10 | - | 6.031 | - | - | - | 5.608 | 5.773 |