Exact(2)
For measurement invariance, each level of invariance was considered to be met if the fit indices difference between each level was equal or less than −0.01 for ΔCFI and equal or less than 0.015 for ΔRMSEA [19, 20].
The interest of all-out tests lasting more than 10 seconds is questionable as the mean power and fatigue indices (difference between peak power and the lower power output) largely depend on aerobic metabolism.
Similar(6)
In this specially designed photonic crystal fiber, the air hole diameters along orthogonal axes adjacent to the core region are different, and hence create an effective index difference between the two orthogonal polarization modes.
The birefringence is defined as the effective index difference between that of x-polarized and y-polarized HE11 modes.
This helps in creating an effective index difference between the two orthogonal polarization modes.
The fiber is designed by increasing refractive index difference between core and cladding and by the introduction of low index rod in the core.
The Y-branch shape was optimized by introducing constant effective refractive index difference between branches (ΔNeff) along the propagation direction through beam propagation method (BPM) scheme.
Furthermore, the femtosecond laser induced refractive index difference between lead crystalline and glass is about 0.13, which is enough to fabricate optical devices such as photonic crystals.
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