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1.
A problem of using a non‐convex penalty for sparse regression is that there are multiple local minima of the penalized sum of squared residuals, and it is not known which one is a good estimator. The aim of this paper is to give a guide to design a non‐convex penalty that has the strong oracle property. Here, the strong oracle property means that the oracle estimator is the unique local minimum of the objective function. We summarize three definitions of the oracle property – the global, weak and strong oracle properties. Then, we give sufficient conditions for the weak oracle property, which means that the oracle estimator becomes a local minimum. We give an example of non‐convex penalties that possess the weak oracle property but not the strong oracle property. Finally, we give a necessary condition for the strong oracle property. 相似文献
2.
This paper examines factors associated with feeling suicidal in a large sample of urban men in Sydney and Melbourne, aged 18-50, including heterosexual, gay and bisexual men, HIV antibody positive and HIV antibody negative. As in previous research, sexuality (being homosexual or bisexual) was found to be a major predictor of suicidality. The research went some way towards explaining the close relationship between feeling suicidal and sexual orientation. Sexuality interacts with feeling bad in that, once men feel moderately bad/depressed, they are more likely to feel suicidal if they are homosexual or bisexual than if they are heterosexual. In addition, the research found that experience of verbal abuse and physical assault (harassment) increased feeling suicidal for both heterosexual and gay/bisexual men, not just for homosexual men as suggested by previous research, and that social isolation in the form of living alone is a further risk factor. Seeking counseling help and taking sexual risks were also independently associated with feeling suicidal. These actions may result from feeling suicidal rather than the reverse, and their association with feeling suicidal warrants further research. Many of the 46 independent variables examined in the research, including HIV antibody status and closeness to the HIV/ AIDS epidemic, were related to feeling suicidal only through their association with being gay/bisexual. Celibacy and general risk taking were not related to feeling suicidal in this study. 相似文献
3.
Van Eeden-Moorefield, Few-Demo, Benson, Bible, and Lummer (2018) recently reviewed the content of seven family social science journals with respect to theory and methods used in 153 articles featuring LGBT research or reviews of LGBT research. They concluded that less than three percent of 6,832 articles published in those journals between 2000 and 2015 were LGBT-related and that most had not used explicit theory and had used purposive cross-sectional samples consisting mostly of White and middle-class participants. During the tenure of the present editor, between 2010 and 2017, Marriage & Family Review featured 14 research reports, reviews, or commentary on LGBT-related issues out of 250 articles, not counting brief editorials or biographies between 2010 and 2017, an odds ratio of over 2.0 compared to the other “top-tier” journals. Likewise, the Journal of Family Theory & Review published at least 15 articles, mainly reviews or commentaries, on LGBT-related issues between 2009 and 2017. Articles in Marriage & Family Review and Journal of Family Theory & Review were more likely to be reviews of the literature, or feature explicit theory, to be qualitative in methodology, or to involve interviews or surveys, while other characteristics were similar to those in the other seven journals. Thus, even if some mainstream family journals did not publish often on LGBT-related issues, other important family science journals have done so. Furthermore, there are numerous scholarly journals that welcome LGBT-related research and reviews almost exclusively. 相似文献
4.
Christina M. Bertilone Suzanne P. McEvoy Dena Gower Nola Naylor June Doyle Val Swift-Otero 《Women and birth : journal of the Australian College of Midwives》2017,30(2):121-128
Background
Pregnancy, labour and neonatal health outcomes for Australian Aboriginal women and their infants are frequently worse than those of the general population. Provision of culturally competent services may reduce these differences by improving access to timely and regular antenatal care. In an effort to address these issues, the Aboriginal Maternity Group Practice Program commenced in south metropolitan Perth, Western Australia, in 2011. The program employed Aboriginal Grandmothers, Aboriginal Health Officers and midwives working in a partnership model with pre-existing maternity services in the area.Aim
To identify elements of the Aboriginal Maternity Group Practice Program that contributed to the provision of a culturally competent service.Methods
The Organisational Cultural Competence Assessment Tool was used to analyse qualitative data obtained from surveys of 16 program clients and 22 individuals from partner organisations, and interviews with 15 staff.Findings
The study found that the partnership model positively impacted on the level of culturally appropriate care provided by other health service staff, particularly in hospitals. Two-way learning was a feature. Providing transport, team home visits and employing Aboriginal staff improved access to care. Grandmothers successfully brought young pregnant women into the program through their community networks, and were able to positively influence healthy lifestyle behaviours for clients.Conclusion
Many elements of the Aboriginal Maternity Group Practice Program contributed to the provision of a culturally competent service. These features could be considered for inclusion in antenatal care models under development in other regions with culturally diverse populations. 相似文献5.
6.
Abstract This paper explores the emergence of the social work profession in Western Australia from beginnings in the 1920s through to 1970 when the first local graduates gained employment. The authors illustrate how WA's history both connects with and diverges from patterns of the profession's development in more populous states, througt, the use of interviews conducted with pioneering social workers These oral histories illuminate how gender, class and other markings of privilege and power framed, and were framed by, the education, practice, sites of practice and career paths of social workers in the early years. Two interacting themes identified in this research were restricted employment possibilities for social workers in the State and a lack of locally available professional education until the mining boom of the sixties. The paper concludes by listing six lessons for current practitioners: the transcendent importance of reading contexts; identifying and developing relevant sites of practice; maintaining flexible boundaries of professional practice; being able to articulate a dynamic value base to drive practice; the importance of practitioners in shaping education, and continuing practitioner reflexivity. 相似文献
7.
8.
Andrew Worthington Kerry Brown Mary Crawford David Pickernell 《Review of Economics of the Household》2007,5(2):209-221
Regression modeling is used to predict gambling patterns in Australia on the basis of the unit record files underlying the
Australian Bureau of Statistics’ Household Expenditure Survey of 6,892 households. The four largest categories of gambling
expenditure are examined, namely: lottery tickets, lotto-type games and instant lottery (scratch cards), TAB (pari-mutuel
wagering) and related on course betting, and poker (slot) machines and ticket machines. Determining factors analyzed include
the source and level of household income, family composition and structure, welfare status, gender, age, ethnicity and geographic
location. Apart from the determinants of expenditure varying widely across the different types of gambling activity, the results
generally indicate that the source of household income is more important than the level of income and that household composition
and regional location are likewise significant in determining gambling expenditure.
相似文献
9.
Fran Crawford Savana Sabine Agustine Leah Earle Ahmed Bawa Kuyini-Abubakar Yoni Luxford Hurriyet Babacan 《Social Work Education》2015,34(5):586-599
Climate change poses significant threat to the wellbeing of global society. Addressing this change has as yet generated no fixed blueprint for social work practice and education. This paper reports on a formative evaluation of one Australian initiative to address this transformative opening in social work field education. Prompted by service users' and workers' experience of the impact of drought, a rurally located social work course team amended the field education curriculum to include a focus on Environment and Sustainability. This learning goal was added to the existing learning goals derived from the Australian Association of Social Workers (AASW) Practice Standards. Students and field supervisors were surveyed on their experience of meeting this new learning goal. While most expressed confidence in understanding the concepts involved, they clearly lacked assurance in interpreting these in practice encounters. Considering their qualitative input suggests that this topic is making a transition from being on the margins of social work to becoming mainstream. Their open-ended responses indicate that the incorporation of environmental sustainability into practice is at a threshold stage of development. Further enactment of eco-social work at the local level is concluded to be supported by using a transformative learning framework in facilitating critical reflection and collaborative dialogue for effective change. 相似文献
10.