Inference and optimal design of multiple constant-stress testing for generalized half-normal distribution under type-II progressive censoring

The generalized half-normal (GHN) distribution and progressive type-II censoring are considered in this article for studying some statistical inferences of constant-stress accelerated life testing. The EM algorithm is considered to calculate the maximum likelihood estimates. Fisher information matrix is formed depending on the missing information law and it is utilized for structuring the asymptomatic confidence intervals. Further, interval estimation is discussed through bootstrap intervals. The Tierney and Kadane method, importance sampling procedure and Metropolis-Hastings algorithm are utilized to compute Bayesian estimates. Furthermore, predictive estimates for censored data and the related prediction intervals are obtained. We consider three optimality criteria to find out the optimal stress level. A real data set is used to illustrate the importance of GHN distribution as an alternative lifetime model for well-known distributions. Finally, a simulation study is provided with discussion.     

The Value of a Statistical Life for Risk‐Averse and Risk‐Seeking Individuals

This article estimates the value of a statistical life (VSL) for Chile under the hedonic wage method while accounting for individual risk preferences. Two alternative measures of risk aversion are used. First, risk aversion is directly measured using survey measures of preferences over hypothetical gambles, and second, over observed individual behaviors that may proxy for risk preferences, such as smoking status, are used. I reconcile the results with a theoretical model of economic behavior that predicts how the wage‐risk tradeoff changes as risk aversion differs across individuals. The VSL estimates range between 0.61 and 8.68 million dollars. The results using smoking behavior as a proxy for risk attitudes are consistent with previous findings. However, directly measuring risk aversion corrects the wage‐risk tradeoff estimation bias in the opposite direction. The results are robust to other observed measures of risk aversion such as drinking behavior and stock investments. Results suggest that, consistent with the literature that connects smoking behavior with labor market outcomes, smoking status could be capturing poor health productivity effect in addition to purely risk preferences.     

融合内容分析和关联分析的短生命周期体验品需求特征模式挖掘方法研究

挖掘特定产品的需求模式无法从整体掌握该类产品的市场特征；短生命周期体验品因缺乏历史销售数据，并且销售总量波动性极大，尤其需要从整体掌握销售总量与产品属性间关系的需求特征规律，但又难以挖掘，亟待提出适用于该类产品的需求特征模式挖掘方法。基于按销售总量分区后各区的需求特征的规律性，提出了一种按销售总量分区、以已有产品介绍集和销售总量为源信息、适用于新产品开发前使用、融合内容分析和关联分析的短生命周期体验品需求特征模式挖掘方法。该方法包括基于内容分析法的产品属性挖掘方法和基于关联分析的产品属性关系模式挖掘方法。前者可以得到较全面的产品属性；后者能够构建不同销售总量区间内产品集的属性关系模式，得到各区间的产品属性关系网，获得高销售总量区间具备，但中、低区间不具备的属性关系模式，从而获得需求特征模式。通过不断更新产品介绍集和销售总量并迭代挖掘，该方法能够动态挖掘需求特征模式。最后利用2013至2016年国产犯罪和爱情类电影数据验证了该方法的可行性，并得到了这两类电影的产品属性及近年的需求特征模式，可用于指导这两类电影的创作。     

Italians with veils and Afros: gender,beauty, and the everyday anti-racism of the daughters of immigrants in Italy

This paper explores the everyday anti-racist practices of the female children of immigrants in Italy. We analyse two case studies: first, a group of Muslim young women in Italy who have publicly re-appropriated what is popularly known as ‘Islamic fashion’; and second, a group of young Afro-Italian women who meet both online and offline to share resources about the care of ‘natural’ Afro-textured hair. We argue that transnational feminist analysis can shed light on the complex ways that aesthetics and the female body are implicated in struggles for social and legal recognition in Italy among the so-called second generation.     

新生代乡村教师的离职意向与政策改进

新生代乡村教师是乡村教育的新生力量和未来的中流砥柱，他们能否安心留在乡村学校从教，关系着乡村教育的可持续发展。为解决乡村教师"留不住"的问题，国务院办公厅于2015年6月发布《乡村教师支持计划（2015-2020年）》，从经济待遇、社会地位、专业发展等方面着手，提出了具体措施。但是通过实证研究发现：当前新生代乡村教师的离职意向仍然普遍存在，尤其是其中的男教师和工作在乡村小学的教师；新时代乡村教师的离职意向，受经济待遇、社会地位、专业发展、个人偏好、乡村文化适应性、家庭和学校支持度、教师教育满意度等多方面因素的影响，其中个人偏好和乡村文化适应性是最主要的影响因素。因此，为了更好地留住新生代乡村教师，仍需在"乡村教师支持计划"现有政策支持的基础上，进一步补充和完善相关的政策措施：（1）重视乡村教师招聘和管理过程中对个人偏好的考察与培育；（2）积极帮助新生代乡村教师适应乡村文化；（3）关心新生代乡村教师的家庭问题，提供帮助和支持；（4）重视乡村学校建设，给予新生代乡村教师更多的组织关怀；（5）出台针对乡村教师的教师教育标准。     

Mothering and everyday life during and in the aftermath of domestic violence among women with immigrant backgrounds in Norway

This paper focuses on how immigrant women experience and negotiate their everyday life with children prior to and after leaving a violent partner. Twenty‐three women staying at domestic violence and abuse shelters with their children were interviewed about their experiences with assistance services and their everyday life with their children. At the time of the interviews, most of the women were legally separated or divorced and were either living in or in touch daily with shelters. In this paper, we look at some of the challenges that women face when exposed to violence in a relationship that involves children. Being exposed to violence from a partner raises a number of economic, practical, and emotional concerns, both prior to and after leaving. For the mothers in our study, maintaining a regular routine is key to making the children feel safe in an unpredictable setting. For many, economic dependence on the partner is replaced with economic dependence on assistance services after leaving the partner. Services must recognize that providing help to mothers who have left a violent partner constitutes more than just practical support but is crucial for mothers' ability to re‐establish a predictable everyday life with their children.     

习近平“不忘初心、牢记使命”重要论述的生成逻辑

习近平“不忘初心、牢记使命”重要论述的生成具有多重逻辑。马克思主义关于无产阶级政党的理论、中国共产党以人民为中心的思想内核是其理论渊源；中国传统民本思想的精髓、以红船精神为源头的革命精神是其文化根基；人民对美好生活的向往、新时代中国特色社会主义任务的严峻性、解决“三个如何”之问的迫切性是其现实要求。     

《1844年经济学哲学手稿》与《神圣家族》中的生活思想

《1844年经济学哲学手稿》和《神圣家族》都是马克思主义创始人早期思想的代表性著作，二者都把“生活”作为重要概念进行论述。从作为经济学哲学概念到作为社会批判概念，马克思主义创始人对“生活”的认识经历了从对物质生产活动的重视到对无产阶级普遍贫困生活的揭露，从分析“生产生活”的异化到对“非人性”生活的批判，从“生活的手段”到消灭“非人性的生活条件”的思想历程。人类的历史是人类生活发展的历史。解决人的美好生活如何实现的问题，在马克思恩格斯的生活思想中居于核心地位，这对当今中国具有重要的理论指导价值。中国特色社会主义进入新时代，从开启一种全新文明的生活形态的高度来理解新时代的美好生活，才能准确把握我国社会主要矛盾变化的深刻意义。     

柏拉图与亚里士多德生成论之比较

柏拉图在《蒂迈欧》和“未成文学说”中所讨论的生成理论与亚里士多德的生成论有很大的相关性，甚至可以说后者是在与前者的对话中形成的。无论是三本原的生成模式学说，火、气、水、土四元素相互生成学说，还是由四元素生成同质体的理论，甚至个别事物的生成理论，亚里士多德都从老师那里获取了理论资源。本文即从这几个方面进行对比论证，表明亚里士多德继承和发展了柏拉图的生成理论。本文还就柏拉图的“接受者”与亚里士多德的最初质料和终极质料的关系进行了进一步的澄清。     

Relationship of sleep quality and attention deficit hyperactivity disorder symptoms with quality of life in college students

Abstract

Objective: Attention deficit hyperactivity disorder (ADHD) negatively influences various aspects of life such as social relations, adaptive skills, and occupation. In addition, many university students experience sleep problems, academic failure, and low quality of life (QOL). We investigated the relationship among ADHD symptoms, sleep quality, and QOL of college students, and identified the factors related to their QOL. Participants and Methods: Using a survey questionnaire, data were collected from 195 students from March–May 2017. Results: QOL of students was related to ADHD symptoms and sleep quality. Factors significantly associated with better QOL were fewer ADHD symptoms, good sleep quality, male sex, high academic performance, and high economic status. The explanatory power of these variables on QOL was 32.0%. Conclusion: To improve the QOL of college students, a multifaceted approach that includes assessment of ADHD symptoms and sleep quality is needed.