The association between discrimination and violence among Somali Canadian youth

Analyses were conducted with a sample of 18–30-year-old Somali Canadians to test the association between discrimination and violence-related beliefs and behaviours, whether this association differs by the source of the discrimination, and whether there is a different pattern of effects for men and women. Results indicate that discrimination from within one’s own community is not associated with attitudes towards violence, anti-violence behaviours or criminal violence. By contrast, out-group discrimination is associated with more anti-violence behaviours by women, although these effects are not strong. Out-group discrimination is also related to criminal violence among men but not women.     

Multilocus linkage analysis by blocked Gibbs sampling

The problem of multilocus linkage analysis is expressed as a graphical model, making explicit a previously implicit connection, and recent developments in the field are described in this context. A novel application of blocked Gibbs sampling for Bayesian networks is developed to generate inheritance matrices from an irreducible Markov chain. This is used as the basis for reconstruction of historical meiotic states and approximate calculation of the likelihood function for the location of an unmapped genetic trait. We believe this to be the only approach that currently makes fully informative multilocus linkage analysis possible on large extended pedigrees.     

Optimization of a catalyst system through the sequential application of experimental design techniques

The selective oligomerisation of ethylene to higher alpha olefins is an area of much recent interest. In this regard, Sasol Technology R{&}D has developed a homogeneous catalyst system based on bis-sulfanylamine (SNS) complexes of chromium for the selective trimerisation of ethylene to 1-hexene. It is activated by methylaluminoxane (MAO), which is an extremely expensive activator. This paper discusses how, through the sequential application of experimental design and response surface techniques, the activator requirements of the catalyst system were reduced 12 times, whilst improving the catalyst activity on a g/g Cr/h basis ca. three times and the activity on a g/g MAO basis ca. nine times. This reduction in the amount of MAO required led to economically attractive catalyst activities for the production of 1-hexene, and would not have been possible without the use of experimental design techniques. This paper will demonstrate the process of investigation through the use of sequential experimental design in practice.     

Optimal saturated block designs when observations are correlated

A- and MV-optimal block designs are identified in the class of minimally connected designs when the observations within blocks are spatially correlated. All connected designs are shown to be D-equal regardless of the correlation structure, and a sufficient condition for E-optimality is presented. Earlier results for the uncorrelated case are strengthened.     

Smoking and Variation in the Hispanic Paradox: A Comparison of Low Birthweight Across 33 US States

The Hispanic Paradox in birth outcomes is well documented for the US as a whole, but little work has considered geographic variation underlying the national pattern. This inquiry is important given the rapid growth of the Hispanic population and its geographic dispersion. Using birth records data from 2014 through 2016, we document state variation in birthweight differentials between US-born white women and the three Hispanic populations with the largest numbers of births: US-born Mexican women, foreign-born Mexican women, and foreign-born Central and South American women. Our analyses reveal substantial geographic variation in Hispanic immigrant–white low-birthweight disparities. For example, Hispanic immigrants in Southeastern states and in some states from other regions have reduced risk of low birthweight relative to whites, consistent with a “Hispanic Paradox.” A significant portion of Hispanic immigrants’ birthweight advantage in these states is explained by lower rates of smoking relative to whites. However, Hispanic immigrants have higher rates of low birthweight in California and several other Western states. The different state patterns are largely driven by geographic variation in smoking among whites, rather than geographic differences in Hispanic immigrants’ birthweights. In contrast, US-born Mexicans generally have similar or slightly higher odds of low birthweight than whites across the US. Overall, we show that the Hispanic Paradox in birthweight varies quite dramatically by state, driven by geographic variation in low birthweight among whites associated with white smoking disparities across states.     

Gay men's experiences coming out online: A qualitative study

The current study employed qualitative methodology to investigate the experiences of 12 gay men who came out online, using Facebook. Analysis of coding data yielded several key themes. First, gay men discussed a range of experiences that influenced their online disclosure, including homophobia, internalized homophobia, and previous salient sexual identity disclosures. Participants also commonly expressed a variety of goals and concerns about coming out online, including improving relationships and loss of friends, respectively. Finally, gay men identified several benefits to coming out on Facebook, including increased efficiency in coming out as compared to face-to-face disclosures, increased authenticity, and decreased ambiguity about their sexuality. Results are discussed within the context of literature on men's coming-out experiences and online identity management.     

Foster parent perceptions of competency: Implications for foster parent training

Studies have examined factors that impact successful placements in foster care. Absent from this body of research, however, are factors that promote foster parent competence. The purpose of this study was to assess perceived competency of foster parents, subsequent to pre-service training, in tasks of foster parenting across 12 domains of foster parenting as recommended by previous research. The sample consisted of 20 foster parents who had completed foster parent training within the past five years. Although foster parents in this study rated themselves as competent in primary domains of foster parenting, there were mixed results as to their satisfaction and acceptance of demands of foster parenting in relation to foster family adjustment and working with a complex care system. Implications for therapeutic interventions are discussed.     

Going It Alone: Post-9/11 Veteran Nonuse of Healthcare and Social Service Programs During Their Early Transition to Civilian Life

Transitioning from military to civilian life is challenging for a substantial number of veterans. Successful transitions require veterans to function well in various well-being domains including employment, education, financial, health, and social relationships. There are many programs and services designed to assist veterans transition to civilian life. However, veterans rarely avail themselves of supportive resources. This study examined veteran nonuse of programs and services within the first three months of their transition to civilian life. Results revealed that male veterans often reported that they did not need programs. Female veterans and veterans from the lowest enlisted ranks were more likely to report that they did not know if they were eligible for support programs. A small percentage of veterans indicated they had not found the right program or did not know where to go to get help. Veterans need clear information about available programs, eligibility requirements, where to locate them, and how to identify which programs will benefit them. Future research should focus on what predicts veteran use of programs and services, how use changes over time, and how programs and services should be advertised/marketed to different veteran populations, particularly those at risk for poor transition outcomes.