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Households suffering from poverty often rely on parental migration and/or paid child labour for survival. The purpose of this paper is to investigate the effects of parental migration on paid child labour and human capital formation in a dynamic context, explicitly taking the effects of parental migration on child’s school and home education into account.

The author utilises a mathematical method. In particular, an overlapping-generations model is built, with agents who have a two-period life. The amount of paid child labour is determined as a solution of the utility maximisation problem.

Contrary to intuition, parental migration possibilities do not necessarily reduce paid child labour. In addition, parental migration possibilities do not necessarily raise human capital. Moreover, a trade-off might exist between alleviating paid child labour and raising human capital under parental migration possibilities.

Migration possibilities are given exogenously evenly among potential migrants by the foreign country. However, in general, they depend on potential migrants’ human capital so that migration possibilities differ across agents.

Migration is usually considered effective in alleviating poverty. However, since it does not necessarily reduce paid child labour and raise human capital, migration should be regulated in some cases as a means to escape from poverty.

This paper deals with parental migration and paid child labour in an identical dynamic model. This paper assumes that human capital is built not only by school education but also home education, the amount of which changes with the duration of parental migration.

The purpose of this paper is to investigate how parental migration due to poverty affects a child’s education and human capital formation through changes in the child’s supply of unpaid labour.

The paper uses a small open overlapping generations model where the parent migrates for the family’s subsistence and that the child has to give up a part of education to do the housework during the parent’s absence.

The paper finds that given the level of the human capital, reducing the child’s burden of housework and promoting parental migration to high-wage countries do not necessarily raise the amount of child’s education. The paper also finds a possible underdevelopment trap in the dynamic context.

Unlike previous studies on child labour, this paper focuses on unpaid labour, whose share is actually larger than that of paid labour. Even if paid labour is available, children cannot re-allocate their time from doing the housework to the market work; so the author cannot disregard this observation. Investigation into the dynamics of human capital formation under such child labour is new.

Three different methods have been studied to prepare silver powder pigments in order to find out the most suitable product for application in conductive paints. X‐ray analysis, specific gravity, pH value, water solubility, oil absorption, particle size distribution, and particle shape of the prepared silver powders were measured and compared with a commercial pigment. It was found that two of the three grades of silver powders have more suitable properties for application as conductive pigments.

The purpose of this paper is to describe the development of a contactless and batteryless loading sensor system that can measure the internal loading of an object structure through several covering materials for structural health monitoring.

The paper proposed an architecture by which two radio frequency identification (RFID) tags are used in the system. It has been difficult to realize sensing by RFID because of the low power supply. To solve the power supply problem, a method using functional distribution of RFID tags of two kinds of RFID for communication and power supply was proposed. One RFID tag is specialized as a power supply for communication of strain loading information through A/D conversion. Another is specialized to supply power for driving the strain gauges bridge circuit.

By using developed system, the measurement of the structural internal loading with 20.0 mm depth was possible through covering materials such as concrete, but also plaster board, flexible boards, silicate calcium board, blockboard, and polystyrene with a resolution performance from 10 × 10⁻⁶ to 40 × 10⁻⁶.

A sensor system was developed using passive RFID, which enables measurement of load‐deformation information inside a structural object. Moreover, the inexpensive wireless, batteryless devices used in this system require little maintenance, and applications for the user interface are also included in the developed system for uniform management of structural health monitoring. The developed system was evaluated in an actual situation using not only concrete but also other materials as covering materials on a structural object.

This study focuses on analysing Japanese pop culture events to determine whether they may be useful marketing tools for a location with a distinctive culture from where they are organized. It also examines how the popular culture events differ from other events and what impacts they have on these destinations.

A mixed-method approach is used to analyse data from a questionnaire provided to 364 participants from these events and seven semi-structured interviews with event organizers or their representatives from events on this topic in Portugal, France, Spain, Denmark and North America.

According to the research, these events are regarded as unique and unusual from the perspective of the customer due to the variety of activities they offer, the use of imagination they inspire and the engaged fan participation. These occasions have been found to strengthen and propagate Japanese popular culture outside of its place of origin and arouse interest in it.

Several studies have examined the appeal of Japanese pop culture, but few have investigated the impact of events to enhance the destination's image where they are held, as well as their potential outside of Japan. With already over a hundred official events of this theme held annually, with a sizable number of participants, a study of this paradigm exposes its potential for promoting a culture that is growing in popularity outside of its place of origin and understanding the effects it has on these various regions.