Simulation of stationary Gaussian vector fields

In earlier work we described a circulant embedding approach for simulating scalar-valued stationary Gaussian random fields on a finite rectangular grid, with the covariance function prescribed. Here, we explain how the circulant embedding approach can be used to simulate Gaussian vector fields. As in the scalar case, the simulation procedure is theoretically exact if a certain non-negativity condition is satisfied. In the vector setting, this exactness condition takes the form of a nonnegative definiteness condition on a certain set of Hermitian matrices. The main computational tool used is the Fast Fourier Transform. Consequently, when implemented appropriately, the procedure is highly efficient, in terms of both CPU time and storage.     

MULTIPLE ECONOMIES AND YOUTH LIVELIHOOD

In this paper we present a model of multiple economic spheres in order to understand and explain the income-generating activities of young people. These spheres include the formal sector, the informal waged sector, the informal non-waged sector, the welfare sector and the criminal sector. We conclude that, due to changes in the labour market that affect them in particular ways, young people are engaged in a diverse range of activities within and across each economic sphere.     

Buffering Effects of a Family-Based Intervention for African American Emerging Adults

This study focused on the buffering effects of Adults in the Making (AIM), a family-centered preventive intervention, on the link between life stress and increases in risk behaviors among 347 rural, southern African Americans as they left high school. Of the families, 174 were assigned to the prevention condition and 173 to a control condition. Emerging adults reported risk behaviors at pretest, posttest (7 months after pretest), and long-term follow-up (10 months after posttest). A significant Life stress × Prevention condition interaction emerged: Increases in risk behaviors were significantly greater among emerging adults in the control condition who experienced high stress levels than among those in the prevention condition who experienced equally high stress levels.     

Hong Kong Parents’ Perceptions and Experiences of Involvement in Homework: A Family Capital and Resource Management Perspective

This qualitative study examines Hong Kong Chinese parents’ perceptions and experiences of involving in their primary school children’s homework process. It draws upon the theoretical frameworks of family capital theory and family resource management perspective to explicate the role of parents in enhancing children’s homework outcomes. Information was collected through individual and focus-group interviews with 52 parents who had at least one child attending primary school. Findings of this study provide a glimpse into the range of homework-involvement strategies used by Chinese parents, and reveal parental goals and cultural values embedded in the generation of family capital. Such understanding on parental involvement is helpful for schools and policy-makers in cultivating parents’ participation in home-based learning processes for children.     

Intimacy and its Denial: When Sons and Daughters Talk About Fatherhood,Marriage, and Work

In this article, I want to offer two vignettes to show the internal workings, or the psycho-social interiors, of the Chinese family. How are the private, the personal, the internal, the local, and the familial being affected by the public and the global, by the external forces in the midst of globalization—and, of course, vice versa? One vignette concerns children: sons and daughters, talking about their own fathers and about fatherhood in Singapore. The other vignette concerns daughters and single women in Hong Kong talking about men, intimacy, sexuality, marriage, family, and, more importantly today, work. The two post-colonial societies are similar and different in a number of ways.     

基于Logit模型的上市公司财务预警实证分析

以2005-2007年中国上市公司为研究对象,采用Logit模型对上市公司财务预警进行实证分析,并对模型的预测效果进行了检验。结果表明logit模型可以对上市公司一年后是否出现财务危机进行预测。     

‘No one believed us: no one came to help’: caregivers' experiences of violence and abuse involving children with fetal alcohol spectrum disorder

Child and adolescent-to-parent violence and abuse (CAPVA) refers to abusive and violent behaviours by children towards their parents or primary caregivers. The abuse and harmful behaviours can include a full range of physical, emotional, verbal, financial, and material actions over prolonged periods of time, from childhood to young adulthood. Parents and caregivers of children with neuro-developmental conditions are vulnerable to CAPVA, and little research has been undertaken exploring the experiences of caregivers of children with fetal alcohol spectrum disorder (FASD). In Aotearoa New Zealand, 56 caregivers were interviewed using semi-structured interviews, and over half identified significant levels and impacts of CAPVA, including dealing with physical violence and frequent emotional abuse. Health and stress issues were present in all caregivers interviewed. Caregivers also identified how systemic ignorance and a lack of understanding from caring professionals led to parent blaming, a sense of shame and isolation. Yet, caregivers also showed resilience and implemented strategies of de-escalation and distraction. More specialised practice is needed in this emerging field of family violence and in how to support families with children who have FASD.     

Caseworkers as a source of hope leading to perceptions of academic success for transitional age foster youth

Research among adolescent samples has consistently demonstrated that a hopeful mindset is associated with resilience and global well-being. Further, research suggests that hope is influenced from an early age from connections with supportive caregivers. However, because older youth in the child welfare system may lack supportive caregivers, alternative sources of hope may be needed. To test a theory that supportive child welfare caseworkers can serve as external sources of hope, we conducted a cross-sectional study of youth in the child welfare system from a single state (N = 149). Using surveys with established scales to measure the variables of interest, the study tested a structural equation model of (1) youth's external hope in their caseworker as a driver of (2) internal hope in themselves leading to (3) more positive perceptions of academic success. Perceptions of academic success were chosen as the final consequence of the model because academic success has been linked to many other variables of well-being across the lifespan. The results indicate that the proposed structural model fits the data well (χ² = 327.9, df = 150; P < 0.001; root-mean-square error of approximation [RMSEA] = 0.09 [90% confidence interval – CI: 0.076, 0.103]; comparative fit index [CFI]: 0.920; standardized root-mean-square residual [SRMR]: 0.05). The results indicate that youths' hope in themselves had origins in external hope in the caseworker. Moreover, the final consequence was an increase in perceptions of academic success. Such results have implications by revealing how case management services can positively influence foster youths' hope and thereby influence their academic success.