Étude de l'effet de la rotation des brides sur la fuite des assemblages boulonnés munis de joints d'étanchéité

Revue bibliographique et approche du code -- Approche du code ASME -- Méthode traditionnelle -- Méthode nouvelle de calcul -- Protocole d'essais -- Le montage expérimental -- Méthodologie de mesure de fuite -- Condition d'essai et nombre de tests -- Validation et analyse des résultats -- Comparaison de la fuite entre différents types de joint -- Étude par éléments finis -- Définition du modèle d'éléments finis -- Distribution de la contrainte de contact du joint -- Rotation de la bride et vérification du modèle d'éléments finis -- Rotation de la face surélevée de la bride -- Distribution radiale de la contrainte de compression sur le joint -- Écrasement du joint -- Influence de la rotation de la bride sur la fuite -- Performance des modes de calcul -- Calcul de la largeur effective des joints

'I'd have to fight for my life there': a multicentre qualitative interview study of how socioeconomic background influences medical school choice.

This is the final version. Available from Taylor & Francis via the DOI in this record. Students from lower socio-economic backgrounds who were educated in state funded schools are underrepresented in medicine in the UK. Widening access to medical students from these backgrounds has become a key political and research priority. It is known that medical schools vary in the number of applicants attracted and accepted from non-traditional backgrounds but the reasons for this are poorly understood. This study aims to explore what applicants value when choosing medical schools to apply to and how this relates to their socioeconomic background. We conducted a multicentre qualitative interview study, purposively sampling applicants and recent entrants based on socioeconomic background, stage of application and medical school of application. We recruited participants from eight UK medical schools. Participants attended semi-structured interviews. We performed a framework analysis, identifying codes inductively from the data. Sixty-six individuals participated: 35 applicants and 31 first year medical students. Seven main themes were identified; course style, proximity to home, prestige, medical school culture, geographical area, university resources, and fitting in. These were prioritised differently depending on participants' background. Participants from lower socioeconomic backgrounds described proximity to home as a higher priority. This was typically as they intended to be living at home for at least part of the course. Those from higher socioeconomic backgrounds were more concerned with the perceived prestige of medical schools. Since medicine is a highly selective course, only offered at a minority of UK higher education institutions, these differences in priorities may help explain observed differential patterns of medical school applications and success rates by applicant social background.National Institute for Health ResearchNational Institute for Health Researc

Human Bocavirus in Infants, New Zealand

In 2005, a parvovirus, subsequently named human bocavirus (HBoV), was discovered in respiratory samples taken from infants and children hospitalized at Karolinksa University Hospital, Sweden, with lower respiratory tract infection. HBoV has since been identified in infants and children with respiratory illness in >17 countries, at frequencies ranging from 1.5% to >18.0%. This study reaffirms previous reports of finding HBoV in a subset of infants with bronchiolitis. It is also, to our knowledge, the first study of its kind in New Zealand infants, confirming wide distribution of HBoV. In the northern hemisphere, HBoV circulates primarily during the winter months, although it continues circulating until early summer, later than most other seasonal respiratory viruses. Therefore, this study may underestimate the percentage of New Zealand infants with bronchiolitis whose HBoV test results were positive because sample collection ceased in October (southern hemisphere spring) at the end of the bronchiolitis epidemic. The small number of HBoV-positive infants prevents conclusions concerning ethnicity, coinfection, and bronchiolitis severity

Stereotyping starlings are more 'pessimistic'.

Negative affect in humans and animals is known to cause individuals to interpret ambiguous stimuli pessimistically, a phenomenon termed 'cognitive bias'. Here, we used captive European starlings (Sturnus vulgaris) to test the hypothesis that a reduction in environmental conditions, from enriched to non-enriched cages, would engender negative affect, and hence 'pessimistic' biases. We also explored whether individual differences in stereotypic behaviour (repetitive somersaulting) predicted 'pessimism'. Eight birds were trained on a novel conditional discrimination task with differential rewards, in which background shade (light or dark) determined which of two covered dishes contained a food reward. The reward was small when the background was light, but large when the background was dark. We then presented background shades intermediate between those trained to assess the birds' bias to choose the dish associated with the smaller food reward (a 'pessimistic' judgement) when the discriminative stimulus was ambiguous. Contrary to predictions, changes in the level of cage enrichment had no effect on 'pessimism'. However, changes in the latency to choose and probability of expressing a choice suggested that birds learnt rapidly that trials with ambiguous stimuli were unreinforced. Individual differences in performance of stereotypies did predict 'pessimism'. Specifically, birds that somersaulted were more likely to choose the dish associated with the smaller food reward in the presence of the most ambiguous discriminative stimulus. We propose that somersaulting is part of a wider suite of behavioural traits indicative of a stress response to captive conditions that is symptomatic of a negative affective state

Separation gap, a critical factor in earthquake induced pounding between adjacent buildings

In this paper it is attempted to study seismic responses of adjacent buildings subjected to earthquake induced pounding and to clarify pounding effects for various separation gaps. An analytical model of adjacent buildings resting on a half-space is provided whilst the buildings are connected by visco-elastic contact force model. Results show that with same separation gap, adjacent buildings with structure-soil-structure interaction (SSSI) are more likely to pound together than buildings with fixed-based (FB) condition. Also, building condition gets worse due to pounding because the seismic responses of buildings are unfavourably increased and the condition becomes more critical if the separation gap becomes narrower

Recognition of nonkeratinizing morphology in oropharyngeal squamous cell carcinoma – a prospective cohort and interobserver variability study *

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90168/1/j.1365-2559.2011.04092.x.pd

The effect of axial load on the sagittal plane curvature of the upright human spine in vivo

Copyright © 2008 Elsevier. NOTICE: this is the author’s version of a work that was accepted for publication in Pattern Recognition . Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Biomechanics, Vol. 41 Issue 13 (2008), DOI: 10.1016/j.jbiomech.2008.06.035Determining the effect of load carriage on the human spine in vivo is important for determining spinal forces and establishing potential mechanisms of back injury. Previous studies have suggested that the natural curvature of the spine straightens under load, but are based on modelling and external measurements from the surface of the back. In the current study, an upright positional MRI scanner was used to acquire sagittal images of the lumbar and lower thoracic spine of 24 subjects. The subjects were imaged in standing whilst supporting 0, 8 and 16 kg of load which was applied axially across the shoulders using an apron. An active shape model of the vertebral bodies from T10 to S1 was created and used to characterise the effect of load. The results from the shape model showed that the behaviour of the average-shaped spine was to straighten slightly. However, the shape model also showed that the effect of load exhibited systematic variation between individuals. Those who had a smaller than average curvature before loading straightened under load, whereas those who had a greater than average curvature before loading showed an increase in curvature under load. The variation in behaviour of differently shaped spines may have further implications for the effects of load in lifting manoeuvres and in understanding the aetiology of back pain

Present and future of gait assessment in clinical practice: Towards the application of novel trends and technologies

BackgroundDespite being available for more than three decades, quantitative gait analysis remains largely associated with research institutions and not well leveraged in clinical settings. This is mostly due to the high cost/cumbersome equipment and complex protocols and data management/analysis associated with traditional gait labs, as well as the diverse training/experience and preference of clinical teams. Observational gait and qualitative scales continue to be predominantly used in clinics despite evidence of less efficacy of quantifying gait.Research objectiveThis study provides a scoping review of the status of clinical gait assessment, including shedding light on common gait pathologies, clinical parameters, indices, and scales. We also highlight novel state-of-the-art gait characterization and analysis approaches and the integration of commercially available wearable tools and technology and AI-driven computational platforms.MethodsA comprehensive literature search was conducted within PubMed, Web of Science, Medline, and ScienceDirect for all articles published until December 2021 using a set of keywords, including normal and pathological gait, gait parameters, gait assessment, gait analysis, wearable systems, inertial measurement units, accelerometer, gyroscope, magnetometer, insole sensors, electromyography sensors. Original articles that met the selection criteria were included.Results and significanceClinical gait analysis remains highly observational and is hence subjective and largely influenced by the observer's background and experience. Quantitative Instrumented gait analysis (IGA) has the capability of providing clinicians with accurate and reliable gait data for diagnosis and monitoring but is limited in clinical applicability mainly due to logistics. Rapidly emerging smart wearable technology, multi-modality, and sensor fusion approaches, as well as AI-driven computational platforms are increasingly commanding greater attention in gait assessment. These tools promise a paradigm shift in the quantification of gait in the clinic and beyond. On the other hand, standardization of clinical protocols and ensuring their feasibility to map the complex features of human gait and represent them meaningfully remain critical challenges