b 2 / h

nc = 1

nc = 2

nc = 3

0.05

0.99

0.98

0.94

0.10

0.91

0.89

0.88

0.15

0.86

0.86

0.86

0.20

0.86

0.83

0.82

0.25

0.80

0.79

0.77

0.30

0.75

0.74

0.72