A fibre optic technique based on the Fresnel reflection from the fibre tip is used for measurements of the refractive indices of various liquids at wavelengths of 1310 and 1551 nm. Reflection signals from liquid-fibre interface are compared with reflection signals from air-fibre interface to obtain the refractive index. Values of refractive indices for distilled water measured by this technique compare very well with known values at both wavelengths only if the fibre effective waveguide index is used. Applying the double-pulse measurement technique, it is shown that a measurement resolution of about 2.5 × 10 −5 can be achieved.
Purpose
In a changing trade landscape, global trade transaction relies on a global supply-chain network. Customs clearance to cross borders is critical to enhancing the competitiveness of both importers and exporters. As such, each country has adopted an authorized economic operator (AEO) program to promote the security of both imported and exported cargo as well as expedite freight movements. The purpose of this paper is to discover the factors which should be taken into account to utilize an AEO program, and to look at the causal relations between these factors.
Design/methodology/approach
This study conducted a survey on 201 AEO programs in Korea. With partial least squares, the structure model is tested using the coefficient value of the determination of the dependent variable, explained by the sign and scale of the path coefficient, statistical significance, and leading variable. Moreover, this study performed bootstrap re-sampling to verify all paths and significance.
Findings
It was found that AEO external pressure, training capacity, and sustainability are shown to have a significant impact on AEO performance. Furthermore, for the group with a high level of AEO application, training capacity and AEO sustainability are shown to have a greater effect on AEO performance. For the group with a low level of AEO application, internal regulation is shown to have a bigger impact on AEO performance.
Originality/value
This study sets itself apart from previous ones in that it examines AEO application for trade security and facilitation with regard to customs, which would affect global supply-chain management.
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