Cytometry inference through adaptive atomic deconvolution

In this paper, we consider a statistical estimation problem known as atomic deconvolution. Introduced in reliability, this model has a direct application when considering biological data produced by flow cytometers. From a statistical point of view, we aim at inferring the percentage of cells expressing the selected molecule and the probability distribution function associated with its fluorescence emission. We propose here an adaptive estimation procedure based on a previous deconvolution procedure introduced by Es, Gugushvili, and Spreij [(2008), ‘Deconvolution for an atomic distribution’, Electronic Journal of Statistics, 2, 265–297] and Gugushvili, Es, and Spreij [(2011), ‘Deconvolution for an atomic distribution: rates of convergence’, Journal of Nonparametric Statistics, 23, 1003–1029]. For both estimating the mixing parameter and the mixing density automatically, we use the Lepskii method based on the optimal choice of a bandwidth using a bias-variance decomposition. We then derive some convergence rates that are shown to be minimax optimal (up to some log terms) in Sobolev classes. Finally, we apply our algorithm on the simulated and real biological data.     

Transgender employment and entrepreneurialism in Vietnam

This article shares insights from research into the economic opportunities and obstacles that Vietnamese transgender men and women face in a fast-growing economy mainly composed of small and medium-sized enterprises. The findings demonstrate that gender norms lead to economic inequality between trans men and women. They also show that small businesses and entrepreneurship play an important role in creating legitimate and satisfying employment for transgender people.     

Tracing Protest Motives: The Link Between Newspaper Coverage,Movement Messages,and Demonstrators’ Reasons to Protest

Within the social movement literature, it is mostly assumed that the reasons why people join a protest demonstration are in line with the collective action frames of the organizations staging the protest. Some recent studies suggest, however, that protesters’ motives are only partly aligned with the messages that are broadcasted by social movements. This study argues that activists’ motives are for an important part shaped by mass media coverage on the protest issue. It investigates the link between people's reasons to protest, the campaign messages of the protest organizers, and newspaper coverage prior to the demonstration. Data cover 14 anti‐austerity demonstrations in Belgium, the Netherlands, and the United Kingdom. Results show that social movements depend a lot on other political actors to gain media visibility for their messages. Furthermore, the relationship between social movement frames and protest participant motives is mediated by newspaper coverage. Protest organizers’ are able to reach demonstrators via their own communication channels to some extent, but for many of their messages, they also rely on journalists’ reporting about the protest issue.     

Observed and parent‐reported conscience in childhood: Relations with bullying involvement in early primary school

This exploratory study aimed to examine which components of early childhood conscience predicted bullying involvement around school entry. In the population‐based Generation R Study, teacher reports of bullying involvement and parent reports of conscience were available for 3,244 children (M age = 6.7 years). Higher levels of overall conscience predicted lower bullying perpetration scores, independently of intelligence quotient, temperamental traits and sociodemographic characteristics. Particularly, the subscales guilt, confession, and internalized conduct, and to a lesser extent empathy, predicted bullying perpetration. Conscience was not related to victimization. Similar results were found using observations during so‐called ‘cheating games’ (subsample N = 450 children). Findings suggest that improving children's understanding of moral standards and norms may be a potential target for bullying intervention programs in early primary school.     

Bullying and Victimization Among Young Elementary School Children: The Role of Child Ethnicity and Ethnic School Composition

School-aged children with an ethnic minority background are relatively often involved in bullying and victimization, but the role of ethnic composition of schools in this context remains unclear. This study examined the relation between ethnic minority background, ethnic school composition, and bullying behaviour around primary school entry in the Netherlands. The study was based on a 2008/2009 school survey in Rotterdam, a Dutch city where about 50 % of children have a non-Dutch background. For 8523 children, teacher reports of bullying behaviour at age 5–6 years were available. Children with a non-Dutch background had higher odds of being a victim (adjusted OR 1.41, 95 % CI 1.11, 1.80), bully (OR 1.38, 95 % CI 1.20, 1.58) or bully-victim (OR 1.38, 95 % CI 1.19, 1.62) than children of Dutch national origin. Ethnic diversity in schools increased children’s risk of bullying behaviour (e.g. OR_victim per 0.1 increase in 0–1 diversity range = 1.06, 95 % CI 1.00, 1.13), with children of both Dutch and non-Dutch national origin relatively more often involved in bullying in ethnically diverse schools. The proportion of same-ethnic peers in school reduced the risk of bullying among children of Dutch national origin (e.g. OR_victim per 10 % more same-ethnic children = 0.90, 95 % CI 0.83, 0.98), but not among non-Dutch children. In conclusion, ethnic minority background and ethnic diversity within schools are risk factors for bullying among 5–6 year olds. Plausibly, reductions in absolute numbers of bullying events may be obtained with tailor-made interventions in ethnically diverse schools. Such interventions should preferably be offered early in the school curriculum.     

Fetal movements: What are we telling women?

Problem

Information that women receive about the importance of monitoring fetal movements and what to do if there are changes is inconsistent and may not be evidence based.

The Johnson Typologies of Intimate Partner Violence: An Investigation of Their Representation in a General Population of New Zealand Women

Typologies of intimate partner violence (IPV) can inform practice and aid with the development of interventions. To maintain utility, typologies should be constantly reviewed in light of emerging results generated from internal and external validation. The presented study is an empirical exploration of the M. P. Johnson (2008 Johnson, M. P. (2008). A typology of domestic violence: Intimate terrorism, violent resistance, and situational couple violence. Boston, MA: Northeastern University Press. [Google Scholar]) typology of IPV using data gathered from the New Zealand replication of the World Health Organization Violence Against Women survey. We could not identify all types of IPV described by Johnson, and we suggest that mutually exclusive types of violent relationships do not exist. Further exploration of the validity of the Johnson typologies, including an exploration of the utility of categorization for suggesting appropriate responses to IPV, is required.     

Boundary oscillations: Epistemological and genre transformation during the 'method' of thesis writing

In this article I offer an account of some of the 'boundary oscillations' I experienced during the writing of my doctoral thesis, and attempt to illustrate my personal struggle with the presentation of qualitative data. This struggle evolved through my search for an appropriate style to [re]present both voice and experience as a text, resulting in my turning towards genres alternative to those normally adopted in social science research. And it was during that process that I experienced both change and conflict in my epistemological position, as I moved from positivism, through postpositivism and towards postmodernism.