Open access family centres and their users: positive results,some doubts and new departures

This article reports findings from a research study of two open access, multi-use, community-based family centres. Structured, qualitative interviews were conducted with 40 adult users and 40 local adult non-users of the two centres. Additionally, a profile of user characteristics was derived from a survey of users attending over a one-week period at both centres. The vast majority of users were women in their twenties, just over half of whom attended with their children. The benefits and limitations of the current functioning of open access centres are discussed, with a potential shift in emphasis along a social development model proposed. Copyright © 1999 John Wiley & Sons, Ltd.     

Orthogonal blocking of response surface split-plot designs

When all experimental runs cannot be performed under homogeneous conditions, blocking can be used to increase the power for testing the treatment effects. Orthogonal blocking provides the same estimator of the polynomial effects as the one that would be obtained by ignoring the blocks. In many real-life design scenarios, there is at least one factor that is hard to change, leading to a split-plot structure. This paper shows that for a balanced ordinary least square–generalized least square equivalent split-plot design, orthogonal blocking can be achieved. Orthogonally blocked split-plot central composite designs are constructed and a catalog is provided.     

Condom negotiation strategy use and effectiveness among college students

College students may engage in risky sexual behaviors, such as inconsistent condom use, which increase their risk of sexually transmitted infections. This study examined the association between six condom influence strategies (CIS) and reported condom use among a diverse group of college students. Differences in CIS and condom use were examined by gender, race or ethnicity, and relationship status (casual, monogamous, or no current relationship). The study also used a cluster analysis to investigate how the CIS were used relative to one another, and how patterns of CIS use were related to condom use. Results showed interesting differences in CIS use by gender, race or ethnicity, and relationship status. Four patterns of CIS usage emerged, and results suggested that using all CIS frequently and using more assertive CIS may be particularly important for increased condom use. Men reported more condom use than women overall, but results indicated that using CIS were especially vital for increasing condom use for women. Surprisingly, there were no differences in condom use found for race or ethnicity and relationship type. Programs aimed at increasing students' condom use could benefit from promoting and practicing CIS, and recognizing potential differences among demographic groups.     

Variations in carbon dioxide fluxes within a city landscape: Identifying a vehicular influence

To date, studies examining carbon dioxide (CO₂) fluxes in urban areas have been limited compared to those in rural environments. The objectives of our study were to examine the relationship between traffic volume and CO₂ fluxes. We demonstrated that CO₂ fluxes were strongly linked with surrounding land use, specifically impervious surfaces and traffic volume. A site near downtown Syracuse in New York State (USA) had relatively constant positive fluxes (source: +39 μmol CO₂ m^?2 s^?1) throughout the year as a result of strong vehicular traffic influence from two nearby interstate highways. There was a strong positive relationship between traffic and CO₂ fluxes (r²?=?0.93, p?<?0.0001) with marked differences between the weekend days versus the workweek days. In contrast, a residential site in Syracuse was dominated by vegetative influences during the leaf-on period due to CO₂ uptake by photosynthesis, reaching a maximum negative mean diurnal flux of ?11 μmol CO₂ m^?2 s^?1 around midday (sink). The spatial variations of CO₂ fluxes identify the critical role played by local traffic volumes in affecting the CO₂ dynamics of urban environments. Understanding the dynamic fluxes of CO₂ in urban environments has important implications for local, regional and global evaluations of CO₂ budgets and inventories, and carbon cycle and climate modeling.     

Navigating the Road to College: Race and Class Variation in the College Application Process

College attendance brings significant financial gain in lifetime earnings, and in order to reap those benefits more students are attending college than ever before. At the same time as more students have been applying to college, the application process itself has changed dramatically in the last few decades. As the last hurdle on the road to college, the application process is a critical step in the overall college‐choice process. However, until recently much of the research on college choice gave little attention to the actual steps of college application and did not always attend to variations by race and class. Considering the increasing importance of a college education and the consistent inequalities by race and class in who attends college, research examining how social background affects the ways in which students navigate the college application process is crucial. This review examines what we do know about race and class variation in college application, drawing from literature across sociology, economics, and higher education. This review addresses three questions: how does the admissions and application process affect race and class inequalities in college attendance? How have scholars modeled this process and do these models capture the experiences of students across race and class? And finally, how do students from different social backgrounds vary in their approach to applying to college?     

Assessing the adequacy of Weibull survival models: a simulated envelope approach

The Weibull proportional hazards model is commonly used for analysing survival data. However, formal tests of model adequacy are still lacking. It is well known that residual-based goodness-of-fit measures are inappropriate for censored data. In this paper, a graphical diagnostic plot of Cox–Snell residuals with a simulated envelope added is proposed to assess the adequacy of Weibull survival models. Both single component and two-component mixture models with random effects are considered for recurrent failure time data. The effectiveness of the diagnostic method is illustrated using simulated data sets and data on recurrent urinary tract infections of elderly women.     

Gender differences in correlates of recent physical assault among untreated rural and urban at-risk drinkers: role of depression

This study examined gender-specific correlates of past 6-month physical assault victimization among 468 men and 229 women at-risk drinkers recruited from both urban and rural settings. Both alcohol dependence and depression were associated with physical assault, but there were differences for women and men in the pattern of significant correlates. Specifically, for women the presence of alcohol dependence, depression or their comorbidity all were associated with physical assault. For men, depression by itself was not associated with physical assault, but alcohol dependence and especially alcohol dependence comorbid with depression were significant predictors. Further, there were stronger relationships between demographics and physical assault for men. The results have implications regarding identification of risk factors for physical assault victimization among at-risk drinkers. Overall, the results of this study suggest that screening and prevention interventions for physical assault among at-risk drinkers should target both alcohol use disorders and depression.     

Private equity: A review and synthesis

The recent international surge in private equity markets has been accompanied by growing interest in its nature and effects. Private equity involves investment in unquoted companies and includes both early stage venture capital and later stage buyouts. The latter, which have been particularly controversial, are our focus. This paper provides a review of the different theoretical approaches that have been deployed to understand this phenomenon. Thereafter, the findings of a large cross section of empirical studies within a range of different national settings are compared and contrasted. Finally, existing themes emerging from – and gaps in – the existing literature and likely future directions are summarized.     

The First Person in Antislavery Literature: John Woolman,his Clothes and his Journal

In his lifetime John Woolman (1720–1772) drew attention to himself with his unusual behavior, his expressive demeanor and his clothes. He sought to become a ‘sign’ directing others toward a way of life without exploitation or slavery. After his death and the publication of his journal, he was celebrated as the most important figure in the campaign to turn the Quakers against slaveholding. Woolman's self-presentation, contemporary responses to him, and the posthumous commemoration of him provide an indication of the power and significance of personal narrative within Quakerism and in antislavery politics in Britain and America.