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131.
In this paper, we present a Bayesian analysis of exponential power mixture models in the presence of a covariate. Considering Gibbs sampling with MetropolisHastings algorithms, we obtain Monte Carlo estimates for the posterior quantities of interest.  相似文献   
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Palloni A 《Demography》2006,43(4):587-615
In this article, I argue that research on social stratification, on intergenerational transmission of inequalities, and on the theory of factor payments and wage determination will be strengthened by studying the role played by early childhood health. I show that the inclusion of such a factor requires researchers to integrate theories in each of these fields with new theories linking early childhood health conditions and events that occur at later stages in the life course of individuals, particularly physical and mental health as well as disability and mortality. The empirical evidence I gather shows that early childhood health matters for the achievement of or social accession to, adult social class positions. Even if the magnitude of associations is not overwhelming, it is not weaker than that found between adult social accession and other, more conventional and better-studied individual characteristics, such as educational attainment. It is very likely that the evidence presented in this article grossly underplays the importance of early childhood health for adult socioeconomic achievement.  相似文献   
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In this paper, we consider that the degradation of two performance characteristics of a product can be modelled by stochastic processes and jointly by copula functions, but different stochastic processes govern the behaviour of each performance characteristic (PC) degradation. Different heterogeneous and homogeneous models are presented considering copula functions and different combinations of the most used stochastic processes in degradation analysis as marginal distributions. This is an important aspect to consider because the behaviour of the degradation of each PC may be different in its nature. As the joint distributions of the proposed models result in complex distributions, the estimation of the parameters of interest is performed via MCMC. A simulation study is performed to compare heterogeneous and homogeneous models. In addition, the proposed models are implemented to crack propagation data of two terminals of an electronic device, and some insights are provided about the product reliability under heterogeneous models.  相似文献   
137.
Some rural regions of Peru showed remarkable rates of poverty reduction and inequality reduction between 2004 and 2012, while others lagged behind. Using microsimulation-based decompositions, we analyse the driving forces behind these trends, finding that rural poverty and inequality reductions are mainly attributable to increasing labour incomes in Peru’s agricultural sector and, to a smaller extent, increasing public transfers. In earlier years, higher returns to experience drive these results, while in later years, increasing staple-crop yields and prices are of key importance. Further, remuneration of working hours increases in reaction to labour-supply shortages in rural areas. The accompanying rising incomes and non-agricultural job creation is less pro-poor than would be ideal, as they benefit more highly skilled workers. Further, shrinking farm sizes hampers poverty reduction and income-inequality reduction. Policies should target the participation of the poor in high-value (non-)agricultural activities, especially if positive trends in commodity prices are only transitory.  相似文献   
138.
The aging process may cause negative physiological changes. However, exercises as resistance training (RT) have been considered an important intervention to attenuate these changes. Additionally, liver plays an important role in blood glucose homeostasis in exercise.

Aim: This study aimed to analyze the effects of RT on the liver components of aged animals.

Methods: Male Wistar rats were divided into two groups: 24 months’ group (CONTROL); and group submitted to a progressive RT protocol for 16 weeks (EXERCISE). Both groups were sacrificed at 24 months.

Results: We observed a decrease in blood flow due to the practice of resistance exercises. Besides, our results showed that hepatic tissue plays an important role in glycemic homeostasis during RT. In addition, RT increased mitogen capacity of hepatocytes.

Conclusions: Our study showed many implications for the knowledge about the effects of strength training on old animals’ liver.  相似文献   

139.
From a communication perspective, social movements of international significance such as the Arab Spring, Toronto G20, Spanish 15M or Occupy Wall Street have been characterized by the use of mobile communication and social media as tools for video activism and counter-surveillance against the abuse of power committed by the state forces. A representative case of this reality, which reached a high coverage and support in social media environment, can be found in the riots that took place in the Gamonal neighbourhood (Burgos, Spain) in January 2014. In this regard, this article focuses on the denunciation of police violence through video activism by Twitter users during the demonstrations across the country, applying a quantitative–qualitative mixed methodology. First, by means of a content analysis, a sample of 784 tweets linked to videos is analysed in order to identify the main topics and functions of the shared content. Second, a textual analysis of those linked videos of a violent nature recorded by witnesses in order to document police interventions is carried out. The prominent use of Twitter for distributing videos to denounce police violence stands out among the main findings, underlining the audiovisual exposure and ‘secondary visibility’ of the police officers. The results obtained also reinforce the idea of citizen empowerment through the development of an alternative form of journalism, as a practice to criticize the mainstream media coverage of the protests. Additionally, this article sheds light on the open debate about the relevance of social media to encourage citizen involvement in a face-to-face interaction.  相似文献   
140.
Drawing on ethnographic research with social movement networks in Spain, this article explores the challenges and possibilities of research collaboration. My project focused on the emerging logics and practices of collective action, the ongoing re-definition of grassroots politics. The engagement with social movements as reflexive communities – not simply objects to be studied, but subjects actively producing their own analysis and explanations, their own ‘knowledge-practices’ – deeply transformed the in-fieldwork encounter. Through a series of co-analysis workshops, designed and implemented together with the research subjects/collaborators, this research became an open-ended dialogue of reflexivities. The shift from working on social movements to working and thinking together with social movement activists as co-researchers produced new scholarly knowledge, advancing our understanding of contemporary collective action, while simultaneously making research useful for the activists. Moreover, locating epistemic and methodological questions at the centre of the project, I addressed salient debates in social science, exploring collaborative frameworks in order to problematize traditional forms of knowledge production and validation.  相似文献   
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