Maximizing k-submodular functions under budget constraint: applications and streaming algorithms

Journal of Combinatorial Optimization - Motivated by the practical applications in solving plenty of important combinatorial optimization problems, this paper investigates the Budgeted k-Submodular...     

The role of visa class in the location choices of immigrants in Australia at the regional and neighbourhood scales

Australia’s pro-immigration policies have played a vital role in national population growth, serving to address what would otherwise be chronic labour shortages and population ageing. While migrants to Australian have shown a clear preference for cities and tend to locate with co-ethnics, variations by visa class—employment, family reunification, and asylum—have yet to be fully explored. This paper aims to identify variations in settlement patterns of immigrants in Australia by visa types and the factors underpinning these choices, paying particular attention to ethnic networks and employment opportunities. We apply a series of negative binomial regressions to aggregate census data linked to visa status. At the suburb level, our results show the importance of the presence of compatriots in shaping the location choices of family migrants, with the exception of skilled and humanitarian immigrants from China, Malaysia and Thailand. At the regional level, skilled migrants, including skilled regional migrants, respond to employment opportunities to a greater extent than family and humanitarian migrants.

     

Interpersonal synchrony is associated with infants’ reactions to subtle changes in caregiver-infant interactions

The present study examined the role of interpersonal synchrony between mothers and their 4-month-old infants (N = 40) in infant responses to a modified interaction where mothers continually looked and verbalised towards but did not engage with their children. During a natural interaction we observed behavioural synchrony and for a subsample of infants (n = 20) measured change in their salivary oxytocin from before to after the natural interaction. During the modified interaction we observed infant gaze, positive, and negative affect. We found that higher interpersonal synchrony was related to longer infants’ social gaze and shorter displays of negative affect during the modified interaction. Increase in infant oxytocin was also associated with longer gaze, but also longer negative and shorter positive affect during the modified interaction. Our results show that interpersonal synchrony allows infants to notice changes in interactions with others, but also helps them to regulate their emotions during such modified exchanges. These findings thus indicate the importance of synchrony experiences with caregivers for the development of early regulatory capacities.     

Making sense of the parenting ‘soft/hard split’

This paper explores the common parenting style tension around nurture versus limit-setting often evident when working with families with a symptomatic child. Firstly it will delve into the parenting ‘soft/hard split’ with an overview of the literature on parenting styles. Next, it summarises the appearance of this phenomenon in the family therapy literature during its formative days, noting how Bowen, Minuchin, Haley, MRI (Bateson), and the Milan associates respond to this parent presentation in their approaches. Next, the paper outlines recent iterations of these family therapy interventions. An expanded discussion follows on Bowen theory's understanding of the parenting tension triangle. The article then outlines elements of the author's qualitative research study of parents' experience of adolescents' mental health treatment where the ‘soft/hard split’ emerged as a repeating theme. Finally, a clinical intervention based on Bowen theory, the Parent Hope Project, is outlined for how it addresses the parenting ‘soft/hard split.’ The goal is to contribute to understanding this phenomenon and its implications for clinical practice.     

Factor structure of the Mini-Maternal Behavior Q-Sort and associations with infant attachment: Informing precision in research and intervention

We examined the factor structure of parental sensitivity to infants as assessed by the Mini-Maternal Behavior Q-Sort (Mini-MBQS), a 25-item short-form of the original 90-item MBQS. We aimed to: (1) identify latent factors of the Mini-MBQS; and (2) validate each factor by testing associations with infant attachment classifications. Data on parent-infant dyads (n = 313; 222 mothers with 281 children, 29 fathers with 32 children) were drawn from a three-generation Australian cohort study. Exploratory Factor Analysis and Exploratory Structural Equation Modelling examined the structure of the Mini-MBQS. Two latent Mini-MBQS factors were identified, requiring 8 of 25 original items: (1) Attention and Responsiveness and (2) Contingency in Interactions. Infants with insecure attachment classifications had parents with lower sensitivity across both factors relative to infants classified secure. In particular, infants with resistant attachment classifications had parents with notably low Contingency in Interactions scores. Infants with disorganised attachment classifications had parents with the lowest relative sensitivity across both factors, and in these dyads Attention and Responsiveness scores were especially low. Results provide an empirically derived factor structure for the Mini-MBQS. Two subscales, each with significant infant attachment associations, may improve precision in clinical intervention and research translation.     

Leading beyond regulatory approval: Opportunities for statisticians to optimize evidence generation and impact clinical practice

The role and value of statistical contributions in drug development up to the point of health authority approval are well understood. But health authority approval is only a true ‘win’ if the evidence enables access and adoption into clinical practice. In today's complex and evolving healthcare environment, there is additional strategic evidence generation, communication, and decision support that can benefit from statistical contributions. In this article, we describe the history of medical affairs in the context of drug development, the factors driving post-approval evidence generation needs, and the opportunities for statisticians to optimize evidence generation for stakeholders beyond health authorities in order to ensure that new medicines reach appropriate patients.     

Connection,connectivity and choice: Learning during COVID-19 restrictions across mainstream schools and Flexible Learning Programmes in Australia

The COVID-19 pandemic and associated school closures may have constrained educational participation particularly for students in disadvantaged circumstances. We explore how 30 disadvantaged students in secondary school (14 mainstream/16 Flexible Learning Programme) from Queensland, New South Wales and Tasmania experienced home learning during the first wave of COVID-19, teasing out nuances across two educational models. Drawing on semi-structured interviews with these students, our analysis revealed three interconnected themes inflecting their learning: connection, connectivity and choice. Connection captures the desire for belonging and practices that facilitated meeting this desire during system-wide disruptions to school routines and face-to-face learning. Connectivity captures the impact of digitally facilitated learning at home on students' ability to engage with curriculum content and with their learning community. Choice captures the availability of viable options to overcome barriers students encountered in their learning and possibilities to flexibly accommodate student preferences and learning needs. Students from Flexible Learning Programmes appeared generally better supported to exercise agency within the scope of their lived experience of home-based learning. Findings indicate a need for strengthening student-centred policy and practices aimed at leveraging the affordances of information technology, balancing self-directed and structured learning and providing holistic support to enable meaningful student choice.