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This paper is mainly focused on labor migration from Southeast Asia to Taiwan, showing a route of south–south mobility and discussing the causes of migrant workers in Taiwan, the issues faced by migrant workers as well as public response to migrant workers.

Besides a literate review on the topic of migrant worker researches in Taiwan, the data for this research was also based on qualitative interviews and observations conducted both in the fieldwork in Taiwan and in Indonesia between June and August during the summer of 2018.

The transnational mobility let many migrants from Southeast Asian countries to Taiwan end up losing their cultural capital and “make money” instead. For these migrants, they have experienced a downward social mobility of class through transnational mobility.

Because of the chosen research approach, the research results may lack generalizability. More migrant laborers from various origin countries were encouraged to include for further research.

Labor migration cases from Southeast Asia to Taiwan could very well serve as good examples in the carrying out of a reflection on the limit of focusing on social science only inside nation-states in order to push a forward thinking on the transnationalization of social inequality.

This paper calls attention to the close linkage between transnational mobility and social inequality. It showed how the transnationalization of social inequality could get new faces through the new waves of labor migration.

This paper aims to improve shearer positioning accuracy. Shearer positioning using an inertial navigation system (INS) is a highly useful technology; however, positioning accuracy is seriously hindered by INS attitude error, particularly heading drift.

A shearer positioning model with double-INS based on extended Kalman filter was proposed. The constant distance between two INSs (INS 1 and INS 2) was selected as the observation vector. Allan variance was used to identify the noise type of the vertical-axis gyroscope, and the stochastic process of heading drift for two INSs was obtained and divided into incongruous drift and concurrent drift.

Simulation was then carried out to determine the optimal arrangement of the two INSs. For incongruous drift, the optimal arrangement satisfied the condition that the line connecting INS 1 and INS 2 was perpendicular to the shearer lateral axis (in the shearer coordinate frame) and parallel to the east-north plane (in the east-north-up coordinate frame). Under optimal arrangement, the positioning accuracy increased against the distance between INS 1 and INS 2. For concurrent drift, the double-INS positioning model had no effect. Under the circumstances, the number of INSs should be increased so that the uncertainty of INS drift was reflected as much as possible.

A new double-INS positioning model was proposed with the constant distance between the two INSs. The optimal arrangement for double-INS was obtained.