Classification with minimum ambiguity under distribution heterogeneity

The traditional classification is based on the assumption that distribution of indicator variable X in one class is homogeneous. However, when data in one class comes from heterogeneous distribution, the likelihood ratio of two classes is not unique. In this paper, we construct the classification via an ambiguity criterion for the case of distribution heterogeneity of X in a single class. The separated historical data in each situation are used to estimate the thresholds respectively. The final boundary is chosen as the maximum and minimum thresholds from all situations. Our approach obtains the minimum ambiguity with a high classification accuracy allowing for a precise decision. In addition, nonparametric estimation of the classification region and theoretical properties are derived. Simulation study and real data analysis are reported to demonstrate the effectiveness of our method.     

Parenting Disputes After Separation and Divorce: Who Needs a Family Lawyer?

Australia's family law system continues to be plagued by serious delays. This article acknowledges the need for legal interventions in post‐separation parenting disputes in which individuals may be at risk, or in cases of genuine emergency. The article next contrasts cases involving significant risk or urgency with the many ‘ordinary’ (even if sometimes complex) post‐separation disputes over parenting in which these circumstances are not present. I argue that in such cases, legal advice, legally informed dispute processes, and court hearings are remnants from earlier attitudes to separation and divorce. These interventions are expensive, frequently destructive of ongoing parental relationships, and at their heart, inappropriate for considering the needs of children. They also divert time and resources from the critical investigative and legal decision‐making processes needed in urgent or risk‐related cases. I propose that legal narratives in ‘ordinary’ post‐separation parenting disputes be replaced by narratives focused on the main drivers of these disputes, which are invariably expressed in terms of relationship difficulties. Such narratives are amenable to facilitative, therapeutic, and systemic interventions aimed at achieving self‐determined resolutions. They contrast markedly with narratives reflecting common law notion of normative resolutions derived from the application of legal precedent. Key issues in the first section of the article are then teased out via the reflections of an imaginary separated parent in an ‘ordinary,’ albeit difficult and emotionally intense, dispute about how to care for the children. In the final section, I offer brief clinical and systemic reflections on past practice and on future narratives focused on individual self‐determination.     

Museums and mining technologies

This article has a twofold purpose, first to explore how the founding of museums helps the mining industry to create a new way to look at what becomes natural in landscapes that are intervened by mining operations, and second to analyze how this new way of looking at the landscape ignites a process of recontextualization having a material impact on the territories. As part of this discussion, this article reveals how the technologies of mining production have evolved, facilitating the companies’ material production, and how the mining museum becomes a fundamental part of this technological development. This article looks at two mining museums owned or funded by the Chilean copper mine Los Pelambres, the ‘Museum of Copper and Sustainable Development’, located in Los Vilos next to Los Chungungos dock, and the ‘Andróniko Luksic Mining Center’, located in the engineering department at the Pontificia Universidad Católica in Santiago. These museums are funded by the mining company Los Pelambres and one of them is currently managed by the company.     

Reconsidering the philanthropic foundation minimum payout policy under a “new normal”

With the increasing salience of foundations in many policy fields, and recent changes in market conditions, policies towards foundations designed decades ago seem outdated. In this article we suggest reassessing foundation payout minimums. To examine the impact of payout rates on grantmaking foundations lifespan and performance under “new normal” economics, we simulate multiple foundations lifecycles using Monte Carlo methods in diverse capital market conditions, with varied investment and payout strategies.We find that while under past market regime perpetuity seems to be a given, under more probable future scenarios, foundations might face increasingly early mortality and endowment depletion, limiting their potential impact. Furthermore, lower payout rates allow for higher lifetime grantmaking, higher mean annual grantmaking, and lower giving volatility. Accordingly, we suggest a tiered payout policy, in line with foundations’ missions and proper financial planning.     

基于股价预测的泛证券投资组合策略

本文基于期望效用最大化和L₁-中位数估计研究了在线投资组合选择问题。与EG（Exponential Gradient）策略仅利用单期价格信息估计价格趋势不同,本文将利用多期价格信息估计价格趋势,以提高在线策略的性能。首先,基于多期价格数据,利用L₁-中位数估计得到预期价格趋势。然后,通过期望效用最大化,提出一个新的具有线型时间复杂度的在线策略,EGLM（Exponential Gradient via L₁-Median）。并通过相对熵函数定义资产权重向量的距离,进而证明了EGLM策略具有泛证券投资组合性质。最后,利用国内外6个证券市场的历史数据进行实证分析,结果表明相较于UP（Universal Portfolio）策略和EG策略,EGLM策略有更好的竞争性能。     

The challenges of new biopsychosocialities: hearing voices,trauma, epigenetics and mediated perception

This chapter considers the promise of epigenetics in the context of the phenomenon of voice hearing and the question of how to account for the links between voice hearing, trauma and abuse. The chapter explores the epistemic spaces and controversies, which surround the calls for a more psychosocial approach to be incorporated into the more molecular focus of epigenetics. This includes the vexed question of how to invent and work with models of psychological processes, which are processual, indeterminate and contiguous with the biological, social, technical, material and immaterial. These challenges are posed for sociologists, psychosocial researchers and molecular biologists, who when theorizing psychological processes, are often trapped by an individual/social dualism or bifurcation between nature and culture. The chapter explores evidence from the Hearing Voices Movement to draw out the issues at stake for addressing biosocial matters.     

Video gaming in adolescence: factors associated with leisure time use

The geographies of the current generation of young people are markedly distinct from previous generations by virtue of their access to a virtual playground. The vast majority of young people now engage in video gaming as a leisure activity. Drawing on findings from the 2009/2010 WHO Health Behaviour in School-aged Children study this paper set out to investigate the factors that might be associated with higher levels of video gaming. Information was collected from 4404 school students aged 11, 13 and 15 years, using anonymised self-completed questionnaires. Higher usage was defined as game play exceeding two hours a day. Separate analyses were conducted for boys and girls. For both genders higher levels of game playing was associated with early adolescence, opposite sex friends and minimal parental mediation. Bullying and going to bed hungry were associated with higher usage for boys only, while life satisfaction and family activities were linked to girls’ game playing only. Parents were identified as effective mediators of young people’s video game usage. The study identified gendered motivations for higher levels of game play, suggesting different interventions for boys and girls may be required in order for young people to create a balanced approach to video gaming.     

Lurking Behavior in Online Psychosocial Discussion Forums: Theoretical Perspectives and Implications for Practice

Improving outcomes of telebehavioral psychoeducation requires rethinking program design when delivered wholly or partially for self-directed participation. Discussion forum participation often follows the “90-9-1 Rule” where 90% of participants lurk, rather than contribute content. A theoretical perspective on the behavior can help explain its adaptive functions, as well as the threats that this behavior poses to the lurker. Implications for practice require program redesign that actively links individual skills training and group-based discussion. The proposed linking design can synergize individual and group participation to support the development of mutual aid, as well as greater interaction with psychoeducation content and materials.     

青海省入境旅游市场的态势分析及预测研究

随着中国入境旅游的迅速发展,青海省的入境旅游呈现出不同的态势。本文从海外游客客源地、客源国等方面对其进行了深入的分析,在此基础上进行了预测,并提出了可行性建议。     

"义理决狱"探析--以《名公书判清明集》为主要依据

宋代的“义理决狱”是中国古代法律儒家化运动中的一次升华,是儒家的精神和原则在司法领域内的具体体现。“义理决狱”以儒家的伦理道德作为司法审判的标准,以调解为手段,以宁人息讼为目的,在调解和息讼中都贯穿着教化的原则。