Risk of Legionellosis in residential areas around farms irrigating with municipal wastewater

The conservation of freshwater is of both global and national importance, and in the United States, agriculture is one of the largest consumers of this resource. Reduction of the strain farming puts on local surface or groundwater is vital for ensuring resilience in the face of climate change, and one possible option is to irrigate with a combination of freshwater and reclaimed water from municipal wastewater treatment facilities. However, this wastewater can contain pathogens that are harmful to human health, such as Legionella pneumophila, which is a bacterium that can survive aerosolization and airborne transportation and cause severe pneumonia when inhaled. To assess an individual adult's risk of infection with L. pneumophila from a single exposure to agricultural spray irrigation, a quantitative microbial risk assessment was conducted for a scenario of spray irrigation in central Illinois, for the growing seasons in 2017, 2018, and 2019. The assessment found that the mean risk of infection for a single exposure exceeded the safety threshold of 10^–6 infections/exposure up to 1 km from a low-pressure irrigator and up to 2 km from a high-pressure irrigator, although no median risk exceeded the threshold for any distance or irrigator pressure. These findings suggest that spray irrigation with treated municipal wastewater could be a viable option for reducing freshwater consumption in Midwest farming, as long as irrigation on windy days is avoided and close proximity to the active irrigator is limited.     

‘Incorrect,loose and coarse terms’: classifying nineteenth-century English-language causes of death for modern use. An example using Tasmanian data

This paper outlines a cause-of-death classification system applicable to nineteenth-century English-language death data. Consisting of 32 categories, this system combines aspects of William Farr’s nosology, developed in nineteenth-century Britain, and the modern International Classification of Diseases. It is sufficiently broad for meaningful categories to be created for analytical purposes, but specific enough for particular cause-of-death trends and patterns to be traced. Individual-level death registration data from the British colony of Tasmania, 1838–1899, are used to demonstrate the application of this classification system. The paper describes the history of recording causes of death in nineteenth-century Tasmania and discusses several problems particular to nineteenth-century cause-of-death data. The benefits and disadvantages of three existing nosologies, Farr’s, Preston’s and the International Classification of Diseases, are considered with reference to nineteenth-century data. The final sections outline the data and method, and discuss an application of the classification system developed for cause-specific child mortality in nineteenth-century Tasmania.     

‘It's a magnifying glass for your relationship’: a thematic analysis of motivations,benefits, and challenges in consensually non-monogamous relationships

The last decade has seen an increase in public and academic interest in consensual non-monogamy (CNM). CNM involves sexual and/or romantic relationships between multiple partners, with the consent of all individuals involved. Engagement in CNM is estimated at 5% of the general population, although due to stigma with the strong idealisation of monogamy in many cultures, it is a hidden population. This qualitative study explores the motivations, benefits, and challenges experienced in CNM relationships, an area that has been understudied despite the resurgence of interest in it. While previous research has mainly focused on comparisons between CNM and monogamy or individual types of CNM such as polyamory, this study seeks to provide a broader understanding of CNM relationships. We employ a critical realist framework and thematically analyse semi-structured interviews with eight participants. The results identify three overarching themes: mononormativity and cultural norms; growth and responsibility; and diversity and complexity; each has several subthemes. These findings suggest that CNM provides opportunities for greater diversification of needs and increased community and individual growth. The study also highlights the challenges experienced in CNM relationships and the strategies used to manage them, such as personal responsibility for managing difficult emotions and temporarily closing a relationship at times for relationship security. A novel finding in this study is that some individuals involved in CNM have internalised cultural norms and the idealisation of monogamy and need to unlearn these norms. This study adds to the existing knowledge on CNM and is expected to be of interest to clinicians and researchers seeking to understand its motivations, benefits, and challenges. Relationship therapists will benefit from increased knowledge of how to work with clients interested or engaged in CNM relationships. Overall, this study supports previous findings that CNM is a viable, enjoyable, yet sometimes challenging type of relationship.     

Poverty and the American Family: A Decade in Review

Because of dramatic levels of economic volatility and massive changes in welfare policies, scholars in this decade worried anew about whether our official poverty measure, adopted in the 1960s, is adequate. Poverty's causes continued to be debated, with demographic factors often pitted against policy and maternal employment changes. Some scholars focused on events that trigger spirals into poverty or poverty exits. The literature on consequences of poverty featured new techniques for identifying underlying processes and mechanisms. Researchers also explored “neighborhood effects” and focused on poverty deconcentration efforts. Finally, scholars produced a voluminous literature on the efforts to reform welfare and their subsequent effects.     

Putting place on the menu: The negotiation of locality in UK food tourism,from production to consumption

This paper uses a case study of tourism in the Lake District and Exmoor to explore the relationship between ‘local food’ and sustainable rural tourism in the UK. Drawing on qualitative interviews with tourists, food producers and café, pub and restaurant owners, I use an approach based upon the commodity chain to trace the shifts in the discursive and material understandings of the ‘local’ that take place throughout the tourist food chain. These shifts are shown to occur in response to the need to negotiate the tensions between the ideals and the practicalities of food production and consumption which occur as a result of the relationships that exist throughout the food chain. Such conclusions are shown to be important for our understanding of the links between ‘local food’ and sustainable rural tourism because they indicate that we must attend to the values, as well as the practicalities, that drive the contemporary food sector at all stages of the food chain, from production to consumption.     

Computationally simple estimation and improved efficiency for special cases of double truncation

Doubly truncated survival data arise when event times are observed only if they occur within subject specific intervals of times. Existing iterative estimation procedures for doubly truncated data are computationally intensive (Turnbull 38:290–295, 1976; Efron and Petrosian 94:824–825, 1999; Shen 62:835–853, 2010a). These procedures assume that the event time is independent of the truncation times, in the sample space that conforms to their requisite ordering. This type of independence is referred to as quasi-independence. In this paper we identify and consider two special cases of quasi-independence: complete quasi-independence and complete truncation dependence. For the case of complete quasi-independence, we derive the nonparametric maximum likelihood estimator in closed-form. For the case of complete truncation dependence, we derive a closed-form nonparametric estimator that requires some external information, and a semi-parametric maximum likelihood estimator that achieves improved efficiency relative to the standard nonparametric maximum likelihood estimator, in the absence of external information. We demonstrate the consistency and potentially improved efficiency of the estimators in simulation studies, and illustrate their use in application to studies of AIDS incubation and Parkinson’s disease age of onset.     

Diverging Destinies: Maternal Education and the Developmental Gradient in Time With Children

Using data from the 2003?C2007 American Time Use Surveys (ATUS), we compare mothers?? (N = 6,640) time spent in four parenting activities across maternal education and child age subgroups. We test the hypothesis that highly educated mothers not only spend more time in active child care than less-educated mothers but also alter the composition of that time to suit children??s developmental needs more than less-educated mothers. Results support this hypothesis: not only do highly educated mothers invest more time in basic care and play when youngest children are infants or toddlers than when children are older, but differences across education groups in basic care and play time are largest among mothers with infants or toddlers; by contrast, highly educated mothers invest more time in management activities when children are 6 to 13?years old than when children are younger, and differences across education groups in management are largest among mothers with school-aged children. These patterns indicate that the education gradient in mothers?? time with children is characterized by a ??developmental gradient.??     

Older bisexual people: Implications for social work from the ‘Looking Both Ways’ study

There is a growing social work literature about lesbian, gay, bisexual, and transgender (LGBT) older people. However, research and guidance are predominantly based on the experiences of older gay men and, to a lesser extent, older lesbians. There is little to help practitioners work with older bisexual people. The Looking Both Ways study aimed to contribute to this gap in knowledge. We undertook in-depth purposely sampled qualitative interviews with 12 people aged over 50, all of whom have bisexual relationship histories and half of whom also currently identify as bisexual. There were three main findings. First, biphobia (prejudice against bisexual people) impacts on older people with bisexual histories in ways that may affect their well-being in later life. Second, concerns around receiving care are similar in some ways and different in others from the concerns of lesbians and gay men. Third, people with bisexual relationship histories may have developed strong support networks and resilience, factors that may be very beneficial in later life. Three recommendations for social work professionals were identified: 1) understand biphobia, 2) recognize the legitimacy of concerns about receiving care, and 3) ask about support networks rather than assuming family support.     

Challenges in recruiting parents to participate in child welfare research: implications for study design and research practice

Although research with hard‐to‐reach populations is necessary to deepen the social work knowledge base and improve services to these groups, recruiting members of hard‐to‐reach populations for research projects is often a challenging process. Frequently, non‐probability sampling is used to obtain participants. However, the difficulties and limitations associated with this process in quantitative research are rarely discussed in depth in the literature. Sampling issues can significantly impact a research project, delaying it, extending it or even causing the premature termination of a project. Challenges to recruitment can limit the type of research that is completed, impact the knowledge base or introduce threats to validity through sampling bias. Using a preliminary quantitative study on parental engagement with child protective services as an illustration for the discussion, the challenges of non‐probability sampling with a hard‐to‐reach population and the implications for research practice are explored and discussed. Implications for future research practice are considered.