The role of vole populations in prevalence of the parasite (Echinococcus multilocularis) in foxes

Effects of population fluctuation of the gray-sided vole(Clethrionomys rufocanus) on the prevalence (infection rates) of the parasiteEchinococcus multilocularis in red fox(Vulpes vulpes) populations was investigated from 1985 to 1992 in eastern Hokkaido (Abashiri, Nemuro, and Kushiro area), Japan. This parasite needs two hosts to complete its life cycle; the gray-sided vole as its intermediate host and the red fox as its final host. We found that: (1) Infection rates in foxes depended on the current-year abundance of voles in all three study areas, particularly in Abashiri. (2) In addition to this direct density-dependence, delayed density-dependence between the infection rate and the prior-year abundance of voles was detected in Nemuro and in Kushiro. (3) The regional differences in density-dependence pattern were related to regional differences in the winter food habits of red foxes: in Abashiri the proportion of voles in the fox’s diet greatly decreases in winter, while the proportion remains high in winter in Nemuro and in Kushiro, probably because of shallower snowpack. These results suggest that infection rates in foxes in Abashiri were less influenced by the prior-year prevalence, since the infection cycle might be interrupted in winter, when voles became less important in fox’s diet. In contrast, the state of the prevalence may carry over from year to year in Nemuro and in Kushiro, because red foxes continue to eat a considerable amount of voles throughout year. The regionally contrasted results for the relationship between infection rate in foxes and vole abundance were parallel to the regional difference in fluctuation pattern of vole populations, which are highly variable in Abashiri area, but less variable in Kushiro-Nemuro area. Drastic change in vole populations appears to affect the host-parasite system.     

日本无障碍环境建设理念及推进机制分析

作为世界上人口老龄化最严重的国家,日本在满足老弱病残等弱势群体出行的无障碍环境建设方面走在了世界前列。日本无障碍城市环境体系由设施、系统规划、导向和服务4个要素构成:完备、合理的无障碍设施建设构成这一体系的基础,注重与环境融合的系统性规划将设施有效联通,以全方位的通用设计理念指导信息导向系统设计,并用服务进一步为环境建设查遗补漏。日本无障碍环境建设背后的推进机制以完善的国家无障碍设计法规体系为基石,以优先推动重点发展区域的无障碍建设为实施手段,同时提升国民无障碍环境建设意识、逐步营造良好的社会环境氛围。有效的机制建设是促进日本无障碍城市环境建设的重要推动力量。     

Redefining the Moral Responsibilities for Food Safety: The Case of Red Meat in New Zealand*

Abstract Food safety governance is shaped by social relationships among the state, the industry, and the public in the food system in a given country. This paper examines the contestation among actors in New Zealand's red meat chain over the implementation of the Animal Product Act of 1999 (APA), which became a cornerstone in the reform of food safety governance. The discussion focuses on the APA's impact on three types of social relations in the red meat chain, those between: (a) the state and the industry; (b) consumers and citizens; and (c) New Zealand and “offshore.” This paper argues that food safety governance is an important element of the moral economy in a given country and poses both policy and ethical challenges in balancing conflicting needs between the global and local agrofood systems.     

A generalized binomial distribution determined by a two-state Markov chain and a distribution by the Bayesian approach

For dependent Bernoulli random variables, the distribution of a sum of the random variables is obtained as a generalized binomial distribution determined by a two-state Markov chain. Asymptotic distributions of the sum are derived from the central limit theorem and the Edgeworth expansion. A numerical comparison of the exact and asymptotic distributions of the sum is also given. Further a distribution of the sum by the Bayesian approach is derived and its asymptotic distributions are provided. Numerical results are given.     

Truthful Equilibria in Dynamic Bayesian Games

This paper characterizes an equilibrium payoff subset for dynamic Bayesian games as discounting vanishes. Monitoring is imperfect, transitions may depend on actions, types may be correlated, and values may be interdependent. The focus is on equilibria in which players report truthfully. The characterization generalizes that for repeated games, reducing the analysis to static Bayesian games with transfers. With independent private values, the restriction to truthful equilibria is without loss, except for the punishment level: if players withhold their information during punishment‐like phases, a folk theorem obtains.     

Social Resources and Occupational Status Attainment: Comparison of Japanese and American Employees' Personal Networks

Abstract: The present study compares Japan and the USA in the ways in which individuals’ personal relationships affect the social standing they achieve. The conceptual framework applied here is similar to that used in established research in Western countries, which examines the effects of both human capital and social capital. The analyses are based on the data collected from a random sample of adult residents in Tokyo, which contains information about their personal networks. This data set is compared with the social network module of the 1985 General Social Survey in the United States. The analyses supported both human capital and social capital theories in the process of status attainment in both countries. Human capital, however, seems to have a stronger influence especially in the USA sample, because certain structural characteristics are associated with one's own educational achievement, which in turn are instrumental in attaining social capital. Unlike the USA, however, the access to social capital in Japan was found primarily through homophily, showing little effect based upon the type of networks they have. The results suggest the difference between the two countries in terms of the function of social resources and the strength of ties that are instrumental in the process of status attainment.     

Differences Between Men and Women in Social Relations, Resource Deficits, and Depressive Symptomatology During Later Life in Four Nations

This article examines gender differences in social relations and resource deficits in France ( N = 553), Germany ( N = 516), Japan ( N = 491), and the United States ( N = 514). These data, from regionally representative samples, indicate few gender differences in quantity or quality of social relations, but that women are more likely than men to experience widowhood, illness, and financial strain. In all countries, more deficits and more negative social interactions are associated with higher levels of depressive symptoms. Interestingly, among women in France and Japan but not among men in any country, quality of social relations offsets the negative consequences of resource deficits. Findings suggest that quality of social relations may have important implications for helping people, particularly women, cope with resource deficits common in late life.     

Public Scholarship and Community Engagement in Building Community Food Security: The Case of the University of Kentucky

The current call for public scholarship and community engagement by universities and disciplinary organizations has created opportunities to develop innovative ways to integrate research, instruction, and outreach. This article discusses a collaboration among scholars at the University of Kentucky and alternative agrifood movement organizations that has evolved as they pursue an alternative agrifood system in Kentucky. This collaboration made instructional programs in sociology and the honors world food issues track places in which both students and instructors can examine “problems” of the conventional agrifood system, conduct research, and develop collaborative relationships with community activists. We draw on Burawoy's discussion of public sociology and its interface with professional, critical, and policy sociologies. Supplementing our discussion with literature from social movements and science studies, we demonstrate how this integrated approach can render sociological knowledge and skills useful as critical support of alternative agrifood movements. We argue that the “experiential classroom” is an excellent site for the critical examination within the agrifood movements of oppositional culture. This, in turn, makes possible students' recognition of injustice in the existing agrifood system.     

Tragedy on grade crossing: driver failure or systemic fragility?

In 2010, an accident occurred in Americana-SP, Brazil, involving two trains and one bus on a Grade Crossing, when 10 people died and 17 were injured including workers. This paper aims to analyze the accident using the Model of Analysis and Prevention of Work Accidents (MAPA). The method provides observation of work, interviews and analysis of documents to understand precedents of the event in the following stages: to understand the usual work from the involved people, the changes occurred in the system, the operation of barriers, managerial and organizational aspects. By the end, measures are suggested to avoid new occurrences. The accident took place at night in a site with insufficient lighting. The working conditions of bus drivers, train operators and watchmen are inadequate. There were only symbolic barriers (visual and acoustic signals) triggered manually by watchman upon train operator radio communication. The fragility of the barrier system associated to poor lighting and short time to trigger the signaling seem to play a critical role in the event. Contrary to the official report which resulted in guilt of the bus driver, the conclusion of the paper emphasizes the fragility of the safety system and the need of level crossing reproject.