四川藏区的媒介形象建构——基于《纽约时报》《人民日报》的比较研究

以《人民日报》《纽约时报》近30年来有关四川藏区的报道为依据,分析其对四川藏区的形象建构。主要发现,在报道主题上,《人民日报》涉及社会、政治、文教、军事等各个方面,《纽约时报》主要关注社会方面;在报道立场上,《人民日报》以正面报道为主,《纽约时报》以负面报道为主;在媒介形象上,《人民日报》建构的四川藏区形象比较正面和丰富,《纽约时报》建构的四川藏区形象负面并且单一。     

Raising rural women’s voices: From self-silencing to self-expression

Within the context of a community-academic partnership, we undertook a mixed-methods study to identify and explore health status, priorities, and management strategies among aging Wisconsin rural women. A questionnaire measuring diverse wellness needs was administered to women participating in personal development programming offered by a rural nonprofit organization. A subgroup participated in qualitative interviews to deepen the understanding of identified health priorities and methods of coping and healing. Findings provide insight into the prevalence of self-silencing among rural women and highlight mechanisms that help to facilitate the dismantling of self-silencing.     

Non uniform exponential bounds on normal approximation by Stein’s method and monotone size bias couplings

It is known that the normal approximation is applicable for sums of non negative random variables, W, with the commonly employed couplings. In this work, we use the Stein’s method to obtain a general theorem of non uniform exponential bound on normal approximation base on monotone size bias couplings of W. Applications of the main result to give the bound on normal approximation for binomial random variable, the number of bulbs on at the terminal time in the lightbulb process, and the number of m runs are also provided.     

A statistical test for detecting discordance in rankings between k groups

In several research areas such as psychology, social science, and medicine, studies are conducted in which objects should be ranked by different judges/raters and the concordance of the different rankings is then analyzed. In such studies, it is also frequently of interest to compare the rankings between different groups of judges, e.g. female vs. male judges or judges from different professions. In the two-group case, the two-group concordance test of Schucany & Frawley can be employed for such a comparison. In this article, we propose an extension of this test enabling the comparison of rankings from more than two groups of judges. This test aims to detect disagreement in the average rankings of the objects between k groups with an at least moderate intra-group concordance. We evaluate this test in an extensive simulation study and in an application to data from an aesthetics study. This simulation study shows that the proposed test is able to detect differences between average rankings and performs well even in situations in which the disagreement is comparably small or the intra-group concordance is inhomogeneous.     

Heteroscedastic Global Tests that the Regression Parameters for Two or More Independent Groups are Identical

Simulation results are reported on methods that allow both within group and between group heteroscedasticity when testing the hypothesis that independent groups have identical regression parameters. The methods are based on a combination of extant techniques, but their finite-sample properties have not been studied. Included are results on the impact of removing all leverage points or just bad leverage points. The method used to identify leverage points can be important and can improve control over the Type I error probability. Results are illustrated using data from the Well Elderly II study.     

Shannon Information In k-records

In this article, we present results on the Shannon information (SI) contained in upper(lower) k-record values and associated k-record times. We then establish an interesting relationship between the SI content of a random sample of fixed size, and the SI in the data consisting of sequential maxima. We also consider the information contained in the k-record data from an inverse sampling plan (ISP).     

Tail Behavior and Limit Distribution of Maximum of Logarithmic General Error Distribution

Logarithmic general error distribution, an extension of the log-normal distribution, is proposed. Some interesting properties of the log GED are derived. These properties are applied to establish the asymptotic behavior of the ratio of probability densities and the ratio of the tails of the logarithmic general error and log-normal distributions, and to derive the asymptotic distribution of the partial maximum of an independent and identically distributed sequence obeying the log GED.     

Smooth tail-index estimation

The two parametric distribution functions appearing in the extreme-value theory – the generalized extreme-value distribution and the generalized Pareto distribution – have log-concave densities if the extreme-value index γ∈[?1, 0]. Replacing the order statistics in tail-index estimators by their corresponding quantiles from the distribution function that is based on the estimated log-concave density ? f _n leads to novel smooth quantile and tail-index estimators. These new estimators aim at estimating the tail index especially in small samples. Acting as a smoother of the empirical distribution function, the log-concave distribution function estimator reduces estimation variability to a much greater extent than it introduces bias. As a consequence, Monte Carlo simulations demonstrate that the smoothed version of the estimators are well superior to their non-smoothed counterparts, in terms of mean-squared error.     

Following the ‘hype’: The role of leisure practices during ‘homeland’ visits in transnational youth's way of relating to Ghana

Drawing on 17 months of ethnographic fieldwork in the Netherlands and Ghana, this paper combines ‘return’ mobilities literature and youth studies to analyse the role of leisure practices during ‘homeland’ visits in transnational youth's way of relating to Ghana when they are entering into adulthood. Using the notion of mobility trajectories, the paper shows that leisure practices facilitate young people's ability to establish and renew intimate transnational relationships with diasporic friends, and Ghana-based same-generation relatives and romantic partners. Differing from earlier stays in Ghana, young people expressed their emerging sense of independence by exploring alternative sides of the country with these peers, based on common interests and belonging to the same life-cycle cohort. The findings add complexity to the notion of the ‘homeland’ as a monolithic place of reconnecting with family and roots by drawing attention to the intersection between young people's pathways to adulthood and transnational mobility.     

成员异质性背景下的农民合作社小农困境分析

成员异质性背景下,合作社发展中是否存在小农困境引起学界关注;结合具体案例,本研究对合作社发展中的小农处境进行分析,并尝试着对小农困境进行理性思考。分析认为:无论是合作社发展中"大农吃小农"的逻辑,还是成立合作社是"小农理性选择"的判断,都存在一定局限性,需要用辩证的观点来看待农民合作社发展中的小农困境;同时,文本提出了若干合作社发展中的小农权益保护策略。