Vacuum moulding of a superplastic

The objective of this research is to develop a model for simulating the super-plastic forming process and for predicting the thickness distribution as well the minimum radius of curvature when the material has to fill a sharp corner. Other questions of interest are the deflection of the sheet as a function of pressure for a given mould opening, and the deflection as a function of mould diameter for a given pressure. Modeling based on shell theory is carried out for cylindrical, spherical and arbitrary-shape shells of uniform as well as non-uniform thick- nesses

Principals and the Professional Victim Syndrome

Principals today are constantly in the public eye. Every decision made subjects him/her to the scrutiny of staff and faculty, students, central office personnel, parents, community members, and board members. Contemporary principals are asked by their superintendents to lead reform efforts effectively or face the possibility of dismissal. Principals often face the dilemma of balancing politics in an effort to appease board members and the superintendent while simultaneously implementing critical change efforts in their schools. Hess and Kelly (2005) suggested that as principals attempt to lead reform efforts, they often go blindly into these positions unprepared and enter the principalship with a naivety towards the political aspect and importance of relationship building. In 2008, Polka and Litchka used the term “professional victim syndrome” (PVS) to describe the condition confronted by educational leaders, especially superintendents, who experienced a career crisis where their professional and personal reputations were tarnished and they were challenged with navigating political waves in order to survive. In this study, the extent to which the PVS exists among principals was examined, how they came to be professional victims; and what mechanisms were used to cope with the crisis experienced. A mixed-methods approach was used for data collection. Members of the Georgia Association of Middle School Principals (GAMSP) and the Georgia Association of Secondary School Principals (GASSP) were asked to complete the Professional Victim Survey for Middle and Secondary Principals. Out of the 443 total valid responses to the survey, 133 reported serving as a middle school principal, and 310 reported serving as a high school principal. Of the respondents, 11% self-reported being a professional victim. While 9 were extensively, interviewed, 75% (36 out of the 48) volunteered to participate in the qualitative study suggesting a willingness to discuss their crisis. All nine of the victims interviewed were involved in implementing change suggesting this to be a contributing factor for PVS. All nine reported having relationship issues and reported that politics played a major role in their crisis. All nine stated that their family, friends, and spirituality made the difference in how they coped with the crisis

NEUROPHYSIOLOGICAL INDICATORS OF EFT TREATMENT OF POST-TRAUMATIC STRESS

Clients previously involved in a motor vehicle accident who reported traumatic stress associated with the accident received two sessions of Emotional Freedom Techniques (EFT) treatments. All dients reported improvement immediately following treatment. Brainwave assessments before and after EFT treatment indicated that dients who sustained the benefit of the EFT treatments had increased 13-15 Hz amplitude over the sensory motor cortex, decreased right frontal cortex arousal and an increased 3-7 Hz / 16-25 Hz ratio in the occiput. The benefits of psychoneurological research to reveal the processes of subtle energy healing are discussed

Chronic Q fever presenting as bilateral extensor tenosynovitis: a case report and review of the literature

Musculoskeletal manifestations of Coxiella burnetii are rare. We describe an elderly, immunosuppressed male with bilateral Coxiella burnetii extensor tenosynovitis treated with incision and debridement and chronic doxycycline and hydroxychloroquine. Additionally, disease etiology, risk factors, pertinent features of the history, testing modalities, and treatment strategies of musculoskeletal Q fever are reviewed.</p

Which factors influence the rate of failure following metal-on-metal hip arthroplasty revision surgery performed for adverse reactions to metal debris? AN ANALYSIS FROM THE NATIONAL JOINT REGISTRY FOR ENGLAND AND WALES

Aims To determine the outcomes following revision surgery of metal-on-metal hip arthroplasties (MoMHA) performed for adverse reactions to metal debris (ARMD), and to identify factors predictive of re-revision. Patients and Methods We performed a retrospective observational study using National Joint Registry (NJR) data on 2535 MoMHAs undergoing revision surgery for ARMD between 2008 and 2014. The outcomes studied following revision were intra-operative complications, mortality and rerevision surgery. Predictors of re-revision were identified using competing-risk regression modelling. Results Intra-operative complications occurred in 40 revisions (1.6%). The cumulative five-year patient survival rate was 95.9% (95% confidence intervals (CI) 92.3 to 97.8). Re-revision surgery was performed in 192 hips (7.6%). The cumulative five-year implant survival rate was 89.5% (95% CI 87.3 to 91.3). Predictors of re-revision were high body mass index at revision (subhazard ratio (SHR) 1.06 per kg/m2 increase, 95% CI 1.02 to 1.09), modular component only revisions (head and liner with or without taper adapter; SHR 2.01, 95% CI 1.19 to 3.38), ceramic-on-ceramic revision bearings (SHR 1.86, 95% CI 1.23 to 2.80), and acetabular bone grafting (SHR 2.10, 95% CI 1.43 to 3.07). These four factors remained predictive of re-revision when the missing data were imputed. Conclusion The short-term risk of re-revision following MoMHA revision surgery performed for ARMD was comparable with that reported in the NJR following all-cause non-MoMHA revision surgery. However, the factors predictive of re-revision included those which could be modified by the surgeon, suggesting that rates of failure following ARMD revision may be reduced further