Ferromagnetism without flat bands in thin armchair nanoribbons

Describing by a Hubbard type of model a thin armchair graphene ribbon in the armchair hexagon chain limit, one shows in exact terms, that even if the system does not have flat bands at all, at low concentration a mesoscopic sample can have ferromagnetic ground state, being metallic in the same time. The mechanism is connected to a common effect of correlations and confinement.Comment: 37 pages, 12 figures, in press at Eur. Phys. Jour.

Experiences of social work intervention among mothers with perinatal mental health needs

Perinatal mental health difficulties are prevalent among women, and the vulnerability of young infants makes this a time when families experiencing multiple adversities may be particularly likely to attract state intervention. However, very little is known about how mothers experience social work intervention during the perinatal period. This study explored experiences of social work intervention among women with perinatal mental health difficulties. Qualitative semi‐structured interviews were carried out with 18 women with 6‐ to 9‐month‐old babies, who had been treated in England for a perinatal mental health difficulty and also had social services intervention. Interviews were analysed using thematic analysis. Findings suggested that mothers had a predominantly negative view of children's social services, especially when social workers had significant child protection concerns. The fear of being judged an unfit mother and having their babies taken away overshadowed their encounters. Mothers felt that social workers would not accept they could be good mothers in spite of their difficulties and set them up to fail. Some felt that social workers focused exclusively on the risks to the baby and did not acknowledge the mother's own needs or understand perinatal mental health. In some cases, social work intervention was described as intensifying pressure on mothers’ mental health, leading to escalating difficulties and increased likelihood of care proceedings. At the same time, our study also included examples of mothers forming positive relationships with social workers, and of ‘turning points’ where initially negative interactions stabilised and child protection concerns lessened. Women's accounts highlighted the importance of feeling ‘known’ by social workers who understood and respected them. The findings also suggested there may be value in improving collaboration between social workers and mental health professionals to create more space for representation of women's needs as well as those of their babies

PREMIUM, a benchmark on the quantification of the uncertainty of the physical models in the system thermal-hydraulic codes: methodologies and data review

The objective of the Post-BEMUSE Reflood Model Input Uncertainty Methods (PREMIUM) benchmark is to progress on the issue of the quantification of the uncertainty of the physical models in system thermalhydraulic codes by considering a concrete case: the physical models involved in the prediction of core reflooding. The present document was initially conceived as a final report for the Phase I “Introduction and Methodology Review” of the PREMIUM benchmark. The objective of Phase I is to refine the definition of the benchmark and publish the available methodologies of model input uncertainty quantification relevant to the objectives of the benchmark. In this initial version the document was approved by WGAMA and has shown its usefulness during the subsequent phases of the project. Once Phase IV was completed, and following the suggestion of WGAMA members, the document was updated adding a few new sections, particularly the description of four new methodologies that were developed during this activity. Such developments were performed by some participants while contributing to PREMIUM progress (which is why this report arrives after those of other phases). After this revision the document title was changed to “PREMIUM methodologies and data review”. The introduction includes first a chapter devoted to contextualization of the benchmark in nuclear safety research and licensing, followed by a description of the PREMIUM objectives. Next, a description of the Phases in which the benchmark is divided and its organization is explained. Chapter two consists of a review of the involvement of the different participants, making a brief explanation of the input uncertainty quantification methodologies used in the activity. The document ends with some conclusions on the development of Phase I, some more general remarks and some statements on the benefits of the benchmark, which can be briefly summarized as it follows: - Contribution to development of tools and experience related to uncertainty calculation and promotion of the use of BEPU approaches for licensing and safety assessment purposes; - Contribution to prioritization of improvements to thermal-hydraulic system codes; - Contribution to a fluent and close interaction between the scientific community and regulatory organizations. Appendices include the complete description of the experimental data FEBA/SEFLEX used in the benchmark and the methodologies CIRCÉ and FFTBM and the general requirements and description specification used for Phase I. Due to the revision of the document, four extra appendixes have been added related to the methods developed during the activity, MCDA DIPE, Tractebel IUQ and PSI methods

Study of working together `Part 8' reports fatal child abuse and*parental psychiatric disorders An analysis of 100 Area Child Protection Committee case reviews conducted under the terms of Part 8 of Working Together under the Childrens Act 1989

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