Wave propagation in stepped and joined shells Annual report, 1 Sep. 1968 - 1 Sep. 1969

Shell impact response and wave propagation in cylindrical and conical shells by experimental and analytical method

Chapter Is coercion ever beneficent?

Early intervention in mental health seeks to improve the wellbeing of as many people as possible, by intervening at an early stage in the onset of illness, or by taking preventative action in ‘at risk’ populations. The paradigm is rhetorically powerful, and it is easy to talk in terms of it helping to deliver rights to health and realise social justice. However, in spite – or perhaps because – of the apparently unarguable desirability of such goals, it is harder to discuss rights to dissent. In this respect the risk of coercion is an issue that should be discussed, especially because of the stigmatizing effect that the labelling associated with early intervention may have in mental health contexts. Here we explore this issue, with a particular focus on its practical and ethical implications in relation to UK policy for treating Attention Deficit Hyperactivity Disorder and mild Conduct Disorder in young people

The effects of river flooding on dioxin and PCBs in beef

In 2008-2010, samples of meat from 40 beef cattle, along with grass, soil and commercial feed, taken from ten matched pairs of flood-prone and control farms, were analysed for PCDD/Fs and PCBs. Concentrations were higher in soil and grass from flood-prone farms. The beef samples from flood-prone farms had total TEQ levels about 20% higher than on control farms. A majority of flood-prone farms (7/10) had higher median levels in beef than on the corresponding control farm. This first controlled investigation into PCDD/F and PCB contamination in beef produced on flood-prone land, presents robust evidence that flooding is a contaminant transfer mechanism to cattle raised on river catchments with a history of urbanisation and industrialisation. PCDD/F and PCB sources in these river systems are likely to be a result of the legacy of contamination from previous industrialisation, as well as more recent combustion activity or pollution events. Crow

Evaluation of Birth Companions perinatal and peer support provision in two prison settings in England: A mixed-methods study

Purpose: In this paper we report on insights from an evaluation of Birth Companions (a UK based charity) perinatal support in two prison settings in England. The initiative involved provision of group and/or one-to-one perinatal support and training women prisoners as peer supporters. Design/methodology/approach: A mixed-methods study was undertaken that involved observations of support groups and peer support supervision sessions (n=9); audio recorded interviews (n=33) with prison and healthcare staff, women in prison, peer supporters and Birth Companions; analysis of existing routinely collected data by Birth Companions and notes undertaken during regular meetings (n=10) with the Birth Companions Project Manager. Thematic analysis was undertaken supported by MAXQDA qualitative data analysis software. Findings: Birth Companions provided instrumental/practical support, emotional support, information support, signposting to services, and advocating for women to the prison concerning their perinatal needs and rights. Key themes revealed that support had an impact on the lives of perinatal women by creating a safe place, characterised by meaningful interactions and women centred approaches that facilitated access to wider care and support. The service made a difference by empowering women and providing added value for peer supporters, prison, health care and Birth Companions staff. Key enablers and strategies for the care of perinatal women and the delivery of perinatal support are also detailed. Originality: Through longitudinal data and the involvement of a range of stakeholders, this study evidences the subtleties of support provided by Birth Companions and the potential it has to make a difference to perinatal women in prison and those volunteering or working within the prison system

The evidence-base for Psychodynamic Psychotherapy with children and adolescents: A narrative synthesis

Despite a rich theoretical and clinical history, psychodynamic child and adolescent psychotherapy has been slow to engage in the empirical assessment of its effectiveness. This systematic review aims to provide a narrative synthesis of the evidence base for psychodynamic therapy with children and adolescents. Building on two earlier systematic reviews, which covered the period up to 2017, the current study involved two stages: an updated literature search, covering the period between January 2017 and May 2020, and a narrative synthesis of these new studies with those identified in the earlier reviews. The updated search identified 37 papers (28 distinct studies). When combined with papers identified in the earlier systematic reviews, this resulted in a combined total of 123 papers (82 distinct studies). The narrative synthesis of findings indicates that there is evidence of effectiveness for psychodynamic therapy in treating a wide range of mental health difficulties in children and adolescents. The evidence suggests this approach may be especially effective for internalizing disorders such as depression and anxiety, as well as in the treatment of emerging personality disorders and in the treatment of children who have experience of adversity. Both the quality and quantity of empirical papers in this field has increased over time. However, much of the research demonstrates a range of methodological limitations (small sample sizes, lack of control groups etc.), and only 22 studies were Randomized Controlled Trials. Further high-quality research is needed in order to better understand the effectiveness of psychodynamic psychotherapy for children and young people

Connecting over the internet: Establishing the therapeutic alliance in an internet-based treatment for depressed adolescents

Internet-based treatments have been developed for youth mental health difficulties, with promising results. However, little is known about the features of therapeutic alliance, and how it is established and maintained, in text-based interactions between adolescents and therapists in internet-based treatments. This study uses data collected during a pilot evaluation of a psychodynamic internet-based therapy for depressed adolescents. The adolescents had instant-messaging chats with their therapists once a week, over 10 weeks. The adolescents also rated the therapeutic alliance each week, using the Session Alliance Inventory. The present study uses qualitative methods to analyse transcripts of text-based communication between the young people and their therapists. The aim is to identify and describe the key features of therapeutic alliance, and reflect upon the implications for theory and clinical practice. Analysis identified three ‘values’ that may underpin a strong therapeutic alliance: togetherness, agency and hope. A number of therapist techniques were also found, which seemed to create a sense of these values during text-chat sessions. These findings are discussed, alongside implications for future research

Reconnaissance Basement Geology and Tectonics of South Zealandia

We report new U‐Pb zircon ages, geochemical and isotopic data for Mesozoic igneous rocks, and new seismic interpretations of mostly submerged South Zealandia (1.5 Mkm2). We use these data, along with existing geological and geophysical data sets, to refine the extent and nature of geological units. Our new 1:25 M geological map of South Zealandia provides a regional framework to investigate the rifting and breakup that formed Zealandia, Earth's most submerged continent. Samples of prerift (pre‐100 Ma) plutonic rocks can be matched with on‐land New Zealand igneous suites and indicate an east‐west strike for the subduction‐related 260 to 105‐Ma Median Batholith across the Campbell Plateau. The plutonic chronology of formerly contiguous plutonic rocks in West Antarctica reveals similar pulses and lulls to the Median Batholith. Contrary to previous interpretations, the Median Batholith does not coincide with the 1,600‐km‐long Campbell Magnetic Anomaly System. Instead we interpret the continental magnetic anomalies to represent a mainly mafic igneous unit, whose shape and extent is controlled by synrift structures related to Gondwana breakup. Correlatives of some of these unsampled igneous rocks may be exposed as circa 85 Ma alkalic volcanic rocks on the Chatham Islands. Extension directions varied by up to 65° from 100 to 80 Ma, and we suggest this allowed this large area to thin considerably before final rupture to form new oceanic crust. Synrift (90–80 Ma) structures cut the oroclinal bend in southern South Island and support a pre‐early Late Cretaceous age of orocline formation.The work was supported by Core Research Funding to GNS Science by the New Zealand Government Ministry of Business, Employment and Innovation

Erythematous capillary-lymphatic malformations mimicking blood vascular anomalies

Superficial erythematous cutaneous vascular malformations are assumed to be blood vascular in origin, but cutaneous lymphatic malformations can contain blood and appear red. Management may be different and so an accurate diagnosis is important. Cutaneous malformations were investigated through 2D histology and 3D whole-mount histology. Two lesions were clinically considered as port-wine birthmarks and another 3 lesions as erythematous telangiectasias. The aims were (i) to demonstrate that cutaneous erythematous malformations including telangiectasia can represent a lymphatic phenotype, (ii) to determine if lesions represent expanded but otherwise normal or malformed lymphatics, and (iii) to determine if the presence of erythrocytes explained the red color. Microscopy revealed all lesions as lymphatic structures. Port-wine birthmarks proved to be cystic lesions, with nonuniform lymphatic marker expression and a disconnected lymphatic network suggesting a lymphatic malformation. Erythematous telangiectasias represented expanded but nonmalformed lymphatics. Blood within lymphatics appeared to explain the color. Blood-lymphatic shunts could be detected in the erythematous telangiectasia. In conclusion, erythematous cutaneous capillary lesions may be lymphatic in origin but clinically indistinguishable from blood vascular malformations. Biopsy is advised for correct phenotyping and management. Erythrocytes are the likely explanation for color accessing lymphatics through lympho-venous shunts

Analysis of Axially Symmetric Motions of Fig. 2 Longitudinal stress resultant Nx at times T = 0.5, T = 0.75, and 1 Cylindrical Shells by the Method of Characteristics

(10) The variables along the impulsive leading wave are now determined and the remainder solution domain is integrated by the characteristics finite-difference technique. An Initial Boundary-Value Problem An initial boundary-value problem is considered whore the developed scheme is demonstrated. The problem consists of a two-layered cylindrical membrane shell subjected to an impulsive axisymmetric load applied at one end of the finite shell, where N Xa is the peak magnitude taken to be unity and ^ is a damping factor taken to be 10 5 1/sec for this example. The dimensionless length of the first layer is taken to be 0.5 and the second layer is 0.125 long. Material properties are as follows: pi = p % = 2.4 X 10-* lb-sec 2 /in. 4 , G hl = 2.45 X 10 6 ips, vi = Vs, Vi = 7o, Ei = 12.8 X 10 6 psi, Ei = 3.5 X 10 6 psi, and R = 24.5 in. Time integration increment is taken to be AT = 0.01. Conclusions and Results The study presented a method for the solution of impulsive stress wave-propagation problems in layered shells. A twolayered shell impacted by a longitudinal axisymmetric load was solved in detail. By examining the results

A flexible loop in yeast ribosomal protein L11 coordinates P-site tRNA binding

High-resolution structures reveal that yeast ribosomal protein L11 and its bacterial/archael homologs called L5 contain a highly conserved, basically charged internal loop that interacts with the peptidyl-transfer RNA (tRNA) T-loop. We call this the L11 ‘P-site loop’. Chemical protection of wild-type ribosome shows that that the P-site loop is inherently flexible, i.e. it is extended into the ribosomal P-site when this is unoccupied by tRNA, while it is retracted into the terminal loop of 25S rRNA Helix 84 when the P-site is occupied. To further analyze the function of this structure, a series of mutants within the P-site loop were created and analyzed. A mutant that favors interaction of the P-site loop with the terminal loop of Helix 84 promoted increased affinity for peptidyl-tRNA, while another that favors its extension into the ribosomal P-site had the opposite effect. The two mutants also had opposing effects on binding of aa-tRNA to the ribosomal A-site, and downstream functional effects were observed on translational fidelity, drug resistance/hypersensitivity, virus maintenance and overall cell growth. These analyses suggest that the L11 P-site loop normally helps to optimize ribosome function by monitoring the occupancy status of the ribosomal P-site