Using Laguerre functions to improve the tuning and performance of predictive functional control

This paper proposes a novel modification to the predictive functional control (PFC) algorithm to facilitate significant improvements in the tuning efficacy. The core concept is the use of an alternative parameterisation of the degrees of freedom in the PFC law. Building on recent insights into the potential of Laguerre functions in traditional MPC (Rossiter et al., 2010; Wang, 2009), the paper develops an appropriate framework for PFC and then demonstrates that these functions can be exploited to allow easier and more effective tuning in PFC as well as facilitating strong constraint handling properties. The proposed design approach and the associated tuning methodology are developed and their efficacy is demonstrated with a number of numerical examples

Input shaping for PFC: how and why?

Predictive functional control (PFC) is a highly successful strategy within industry, but for cases with challenging dynamics the most effective tuning approaches are still an active research area. This paper shows how one can deploy some insights from the more traditional model predictive control literature in order to enable systematic tuning and in particular, to ensure that the key PFC tuning parameter, that is the desired closed-loop time constant, is effective. In addition to enabling easier and more effective tuning, the proposed approach has the advantage of being simple to code and thus retaining the simplicity of implementation and tuning that is a key selling point of PFC. This paper focuses on design for open-loop unstable and also processes with significant under-damping in their open-loop behaviour

Working in partnership with vulnerable families: The experience of child and family health practitioners

Family circumstances in infancy are persistent and powerful determinants of children's physical and mental health, influencing inequalities that trace from childhood through to adulthood. While the social factors that perpetuate patterns of inequality are more complex than can be addressed through single interventions, child and family health (CFH) services represent crucial sites where trajectories of inequality can be disrupted. In particular, approaches that foster opportunities for practitionerparent engagement that challenge traditional hierarchical health care practice, such as the Family Partnership Model (FPM), are recommended as ways of addressing disadvantage. Little is known about how practitioners implement models of working in partnership with families and, consequently, there is a gap in understanding how best to develop and sustain these new CFH practices. This paper reports a research project that investigated the experiences of 25 health professionals working within a FPM framework with vulnerable families. Through discussion of four key themes redefining expertise, changing practices, establishing new relationships with parents and the complexities of partnership practice the paper offers first-hand accounts of reframing practices that recognise the needs, skills and expertise of parents and thus contribute to empowerment of families. © 2011 La Trobe University

Reflexivity in correctional research: Researcher perspectives on parenthood in a study with incarcerated parents

© The Author(s) 2018. As incarceration rates rise worldwide, increasing numbers of parents are separated from their children. Researchers have studied the psychosocial impact on inmates and their families extensively. However, few researchers have examined how their own perspectives affect the collection and interpretation of data, specifically about parenting in correctional settings. This paper consider methodological implications of conducting research with incarcerated mothers and fathers, employing critical reflexivity to explore researchers’ individual and collective experiences in a study in Australian correctional facilities. Using ourselves as informants, we examine how the context and life experiences of ‘researcher’ and ‘researched’ interact during interviews in a unique and emotionally charged environment. Correctional research requires careful adaptations to collect meaningful data from inmates and recognise their vulnerability as parents. The emotional content of interviews also has implications for analysing and interpreting research data. Our focus on interviewees as mothers and fathers, rather than as offenders, generated greater understanding of the needs of parents in custody. Recognising researchers’ feelings, experiences and perspectives on parenthood can enrich research with families affected by the criminal justice and child protection systems. These insights can also inform the understanding and practice of social workers, health practitioners, educators and students who work with marginalised parents and children

Becoming a “Better” Father: Supporting the Needs of Incarcerated Fathers

© 2017, © 2017 SAGE Publications. Given the importance of fathering to the well-being and development of children, paternal incarceration has a major impact on children and families. Drawing on interviews with 64 incarcerated fathers in New South Wales, Australia, this article explores their experiences. The men’s childhood familial separation and disconnection is frequently repeated in adulthood, with limited contact with their own families even when not in custody. Despite barriers to connection, the interviewees express strong aspirations to be “good” fathers and to achieve a “better life” for their children. The absence of stable models of responsive fathering in early life is a common theme that has implications for the development of education and support programs for imprisoned fathers

Maternal incarceration: Impact on parent-child relationships.

Female incarceration is rising steeply in Australia and other high-income countries. The majority of incarcerated women are mothers. Their children represent a particularly vulnerable group, often subject to adverse experiences due to their family's disadvantaged circumstances involving inadequate housing, food insecurity, poverty, poor health, a lack of personal safety due to violence and resulting trauma. This qualitative study explores parenting experiences of incarcerated mothers separated from their children. Interviews involved 65 mothers in three Australian prisons and 19 stakeholders providing correctional services and support for incarcerated women. Data were analysed using interpretive description. Mothers' accounts highlighted frustrations resulting from trying to maintain relationships with their children, often exacerbating their separation and compounding parenting difficulties. Two major themes emerged from the data: 'protecting their children' and 'at the mercy of the system'. Mothers described how they tried to protect their children from the consequences of their incarceration, yet many of the correctional system processes and procedures made it even harder to maintain connection. Incarcerated mothers need support in their parenting role. Ideally, this support should commence during incarceration. Further, changes within prison routines could enhance mothers' efforts to keep in contact with their children, through visits and phone calls

Australian parents’ use of universal child and family health services: A consumer survey

© 2018 John Wiley & Sons Ltd This study aimed to explore Australian parents’ use of universally available well-child health services. It used an online survey of 719 parents of children aged from birth to 5 years in all states and territories to examine patterns of service use and consumer preferences. In Australia, several health professional groups provide advice to pregnant women, infants, children, and parents, offering health promotion, developmental screening, parenting support, and referral to specialist health services if required. The survey examined parents’ use of different child and family health providers, and their preferences for support with several common parenting issues. The study indicated that families with young children obtain primary healthcare from a range of service providers, often more than one, depending on children's ages and needs. Parents frequently visit general practitioners for immunisation and medical concerns. They attend dedicated child and family health nurses for parenting advice and well-child checks and prefer them as an information source for many health issues. However, a substantial proportion of parents (44.1%) do not currently visit a child and family health nurse, often because they not only do not perceive a need but also sometimes because these services are unknown, inaccessible, or considered unsuitable. They may seek advice from less qualified sources. There is potential for increased collaboration between child and family health providers to ensure effective resource use and consistency of parenting information and advice. Nursing services may need to address accessibility and appropriateness of care

When parenting does not ‘come naturally’: providers’ perspectives on parenting education for incarcerated mothers and fathers

© 2017 Informa UK Limited, trading as Taylor & Francis Group. Learning to parent sensitively and safely can be challenging for adults with childhood abuse and neglect experiences. Such childhood experiences are prevalent among incarcerated parents whose ability to parent their own children is also limited by separation from them. Several prisons have developed programs to foster pro-social parenting skills among incarcerated mothers and fathers to assist them on release. This paper reports a qualitative research study that explored the factors affecting the delivery and outcomes of parenting programs in correctional facilities in New South Wales Australia from the perspective of individuals involved in developing and implementing the programs. Thematic analysis of 19 interviews identified two main themes: supporting parents’ learning in correctional settings and providers’ learning about parent education in correctional settings. Respondents reported the benefits of providing creative learning opportunities enabling parents to build on their strengths and to develop relationships. These factors contributed to changing prisoners’ attitudes and supporting them to consider alternative parenting approaches. The co-productive approach to parent education supported enhanced parenting knowledge among parents and greater insights among educators. Parenting education can be successfully delivered in correctional settings and can assist incarcerated parents to build on existing knowledge and adapt it to their own needs

Temperature dependence of the resistance of metallic nanowires (diameter ≥\geq 15 nm): Applicability of Bloch-Gr\"{u}neisen theorem

We have measured the resistances (and resistivities) of Ag and Cu nanowires of diameters ranging from 15nm to 200nm in the temperature range 4.2K-300K with the specific aim to assess the applicability of the Bloch-Gr\"{u}neisen formula for electron phonon resistivity in these nanowires. The wires were grown within polymeric templates by electrodeposition. We find that in all the samples the resistance reaches a residual value at T=4.2K and the temperature dependence of resistance can be fitted to the Bloch-Gr\"{u}neisen formula in the entire temperature range with a well defined transport Debye temperature ($\Theta_{R}$). The value of Debye temperature obtained from the fits lie within 8% of the bulk value for Ag wires of diameter 15nm while for Cu nanowires of the same diameter the Debye temperature is significantly lesser than the bulk value. The electron-phonon coupling constants (measured by $\alpha_{el-ph}$ or $\alpha_{R}$) in the nanowires were found to have the same value as that of the bulk. The resistivities of the wires were seen to increase as the wire diameter was decreased. This increase in the resistivity of the wires may be attributed to surface scattering of conduction electrons. The specularity p was estimated to be about 0.5. The observed results allow us to obtain the resistivities exactly from the resistance and gives us a method of obtaining the exact numbers of wires within the measured array (grown within the template).Comment: 9 pages, 10 figure