Influences of wild crucifers on life history traits and flight ability of the diamondback moth,Plutella xylostella (Lepidoptera: Yponomeutidae)

The larvae ofPlutella xylostella were fed on five wild crucifers,Capsella bursa-pastoris, Lepidium virginicum, Cardamine flexuosa, Rorippa indica, R. islandica and a crop, cabbage. The developmental period of the immature stages, adult longevity, preoviposition period, fecundity and morphometrical characters of the adults were measured. The flight activity of the adults was also measured by the tethered flight method. All the wild plants except forR. islandica were less suitable host plants than cabbage, and larvae which were fed on these less suitable plants emerged as smaller adults with shorter wings. The smaller female adults had lower fecundity but a higher flight activity. Smaller adults measured in terms of their pupal weight among individuals fed on the same host plant had longer wings. These smaller adults with longer wing flew more actively.     

The U‐turn phenomenon among South American‐Japanese descendants: From emigrants to migrants

About a decade has passed since the problem of foreign migrant workers became serious in Japan. The Japanese government has been reluctant to formalize the introduction of migrant workers in the unskilled job sectors, yet, with the revision of the Immigration Control Law in 1990, has decided to formalize the status of residence of South American‐Japanese descendants, or Nikkeijin. This article focuses on the issue of the Nikkeijin in Japan. The article details the current position of the Nikkeijin and reviews their impact on Japanese society as well as on their home countries. The article further discusses the possibility of Nikkeijin settlement in Japan in the context of the government's attempts to preserve the notion of lineage as the basis for Japanese nationality.     

A national pride or a colonial construct? Touristic representation and the politics of Fijian identity construction

Identity research in the Pacific region has been dominated in the past by discussions of reconstruction and mobilisation of symbols of cultural tradition as a medium of anti-colonial resistance and nationalism. The present article proposes to widen the scope of this literature by exploring mass tourism as a contested field of collective identification. It outlines the historical making of the colonial and post-colonial imagery of indigenous Fijians and its subsequent reification and essentialisation in the context of twentieth-century mass tourism. It further highlights the implication of this process in colonial, anti-colonial and post-independence national politics, in which indigenous Fijians have been variously located: the imagery has been claimed by Western colonialism, transnational corporate capitalism, ethno-nationalism, and counter-hegemony. The article illustrates that collective identity construction is not political in a uni-dimensional manner but constitutes a dynamic arena of ongoing ‘cultural battle’ where multiple power relations unfold simultaneously.     

Bioaccessibility of Fukushima‐Accident‐Derived Cs in Soils and the Contribution of Soil Ingestion to Radiation Doses in Children

Ingestion of contaminated soil is one potential internal exposure pathway in areas contaminated by the Fukushima Daiichi Nuclear Power Plant accident. Doses from this pathway can be overestimated if the availability of radioactive nuclides in soils for the gastrointestinal tract is not considered. The concept of bioaccessibility has been adopted to evaluate this availability based on in vitro tests. This study evaluated the bioaccessibility of radioactive cesium from soils via the physiologically‐based extraction test (PBET) and the extractability of those via an extraction test with 1 mol/L of hydrochloric acid (HCl). The bioaccessibility obtained in the PBET was 5.3% ± 1%, and the extractability in the tests with HCl was 16% ± 3%. The bioaccessibility was strongly correlated with the extractability. This result indicates the possibility that the extractability in HCl can be used as a good predictor of the bioaccessibility with PBET. In addition, we assessed the doses to children from the ingestion of soil via hand‐to‐mouth activity based on our PBET results using a probabilistic approach considering the spatial distribution of radioactive cesium in Date City in Fukushima Prefecture and the interindividual differences in the surveyed amounts of soil ingestion in Japan. The results of this assessment indicate that even if children were to routinely ingest a large amount of soil with relatively high contamination, the radiation doses from this pathway are negligible compared with doses from external exposure owing to deposited radionuclides in Fukushima Prefecture.     

A Study of the Properties of the Item Count Technique

The item count technique is an indirect questioning techniquethat is used to estimate the proportion of people who have engagedin stigmatizing behavior. This technique is expected to yielda more appropriate estimate than the ordinary direct questioningtechnique because it requests respondents to indicate, basedon a list of several items, simply the number of items thatare applicable to them, including the target key item. An experimentalweb survey was conducted in an attempt to compare the directquestioning technique and the item count technique. Comparedwith the direct questioning technique, the item count techniqueyielded higher estimates of the proportion of shoplifters bynearly 10 percentage points, whereas the difference betweenthe estimates using these two techniques was mostly insignificantwith respect to innocuous blood donation. The survey resultssuggest that in the item count technique respondents tend toreport fewer total behaviors compared to the direct questioncase. This tendency is more pronounced in the case of longeritem lists. Three domain estimators for the item count techniquewere compared, and the cross-based method appeared to be themost appropriate method. Large differences in domain estimatesfor shoplifting between the item count and direct questioningtechniques were found among female respondents, middle-agedrespondents, respondents living in urban areas, and highly-educatedrespondents.     

Associations Between Financial Transfer from Grandparents and Family Expenditures for Children’s Precollege Education in Japan

Given higher family spending for education and the relative poverty rate in Japan, the recent (2013–2021) tax incentive for grandparents’ support for educational expenditures for children might widen opportunities offered to the younger generation. Using nationally representative data from the 2017 Keio Household Panel Survey (n?=?502) and a double-hurdle model, this paper examined the associations between grandparents’ financial contributions and family expenditures for school age children’s education, controlling for family characteristics associated with such expenditures. Although examining just the period when the tax incentive is in effect limited the ability of this study to suggest the findings were related to the incentive, overall, variations in financial support from grandparents were not associated with family expenditures for children’s educations in the multivariate model. Although there was no evidence of an educational advantage from intergenerational transfers during the observation period, financial transfers from grandparents may have served as a substitute for the overall family expenditures for children’s education, thus potentially widening the opportunity gap among children.

     

The question of community attachment revisited

In this paper we compare the relative effects of satisfaction with specific community (neighborhood) attributes and social integration into the community on community attachment. Previous research on community attachment has not assessed the importance of satisfaction with specific attributes as a determinant of attachment. Instead, this research has focussed on integration into the social life of a community as the primary source of community attachment. We find that although social integration has the more important effect on attachment, satisfaction with specific community attributes also has a statistically significant effect. People who are satisfied with the general physical appearance, the noise level, and the quality of neighbors in their communities tend to be more attached to them than those who are less satisfied. We address the theoretical and policy implications of this finding. In short, this finding implies, contrary to previous thought, that it is possible for there to be higher levels of attachment to communities that appear to be lacking a well‐developed social life. It also implies that levels of attachment to communities could be enhanced by programs that improve certain features of the physical environment which are seen as indicative of the quality of communities as good places to live.     

A Study of Youth Services Networks from a Political-Economy Perspective

ABSTRACT

Volunteers play a vital role in modern societies by boosting the labor force within both the public and private sectors. While the factors that may lead people to volunteer have been investigated in a number of studies, the means by which volunteering contributes to the well-being of such volunteers is poorly understood. It has been suggested through studies that focus on the absence of depression in volunteers that self-esteem and sense of control may be major determinants of the increased well-being reported by volunteers. This is consistent with the homeostatic model of subjective well-being, which proposes that self-esteem, optimism, and perceived control act as buffers that mediate the relationship between environmental experience and subjective well-being (SWB). Using personal well-being as a more positive measure of well-being than absence of depression, this study further explored the possible mediating role of self-esteem, optimism, and perceived control in the relationship between volunteer status and well-being. Participants (N = 1,219) completed a 97-item survey as part of the Australian Unity Wellbeing project. Variables measured included personal well-being, self-esteem, optimism, and a number of personality and psychological adjustment factors. Analyses revealed that perceived control and optimism, but not self-esteem, mediated the relationship between volunteer status and personal well-being.