PAN AIR summary document (version 1.0)

The capabilities and limitations of the panel aerodynamics (PAN AIR) computer program system are summarized. This program uses a higher order panel method to solve boundary value problems involving the Prandtl-Glauert equation for subsonic and supersonic potential flows. Both aerodynamic and hydrodynamic problems can be solved using this modular software which is written for the CDC 6600 and 7600, and the CYBER 170 series computers

Nurses' implicit and explicit attitudes towards transgender people and the need for trans-affirming care

Background: The primary objective of this study is to investigate the implicit and explicit attitudes of healthcare professionals - in particular nurses - towards transgender people. This is especially important in light of recent calls for improved trans-affirming care provision by healthcare professionals to generate quality healthcare access and outcomes for transgender people. Methods: We use publicly available data from the transgender version of the Implicit Association Test from 2020 to 2022. We focus on differences between three subsets of participant: (1) non-healthcare professionals (N = 177,810), (2) non-nursing healthcare professionals (N = 22,443) and (3) nursing healthcare professionals (N = 11,996). We present the results of parametric statistical tests (t-tests) and an ordinary least squares regression, to analyse the robustness of our results when controlling for a host of sociodemographic characteristics. Results: We find that non-healthcare professionals have significantly lower implicit bias towards transgender people compared to healthcare professionals. Further, within healthcare professionals, we find nurses have significantly higher implicit bias towards transgender people compared to non-nurses. We show how implicit bias and explicit attitudes are highly correlated. Further, we provide evidence that healthcare professionals - but in particular nurses - conflate sex and gender identity. Conclusion: Whilst nurses continue to have higher levels of implicit and explicit bias towards transgender people there remains a need to globally establish additional enhanced trans-affirming care training provision for nursing and medical students

“But what do you really think?” Nurses' contrasting explicit and implicit attitudes towards people with disabilities using the implicit association test

Aims: To investigate how nurses' implicit and explicit attitudes towards people with disabilities (PWD) compare to (1) other healthcare providers and (2) non‐healthcare providers.Method: We present an analysis of secondary data from the publicly available disability Implicit Association Test (IAT). We compare the explicit and implicit attitudes towards PWD for (1) nurses (n = 24,545), (2) other healthcare providers (n = 57,818) and (3) non‐healthcare providers (n = 547,966) for a total of 630,238 respondents, between 2006 and 2021.Data Sources: We use publicly available data for the Disability IAT from Open Science Framework repository of Project Implicit available at https://osf.io/tx5fi/.Reporting: STROBE checklist.Results: There is a distinct contrast between nurses' explicit and implicit attitudes. While nurses have more positive explicit attitudes towards PWD compared to other groups, they also have more negative implicit attitudes towards PWD. As such there is a contrast between nurses' stated (explicit) attitudes and their unconscious (implicit) attitudes towards PWD. Further, we find that implicit bias towards PWD—among all groups—has not improved over the 15 year period of our sample.Conclusions: We present a contrast between nurses' explicit and implicit attitude towards PWD compared to non‐healthcare providers. We posit that implicit bias is driven by a combination of workload and stress which drives nurses to unconscious modes of thinking more frequently.Implications: We discuss three potential tools for improved educational praxis regarding treatment of PWD; (1) more PWD service user involvement, (2) the use of mindfulness techniques to reduce stress and (3) the use of patient contact simulation to promote education and understanding.Patient or Public Contribution: There is no patient or public contribution

V/STOL lift fan commercial short haul transports: Continuing conceptual design study

A design study of commercial V/STOL transport airplanes for a 1985 operational time period has been made. The baseline mission considered was 400 nmi at a cruise speed of M = 0.75 and a 100-passenger payload with VTOL. Variations from the baseline included mission distance, payload, cruise speed, and propulsion system failure philosophy. All designs used propulsion systems consisting of multiple gas generators driving remote tip turbine lift and lift/cruise fans. By considering the fan to be designed for operational reliability, significant simplication of the airplane systems and reduction in airplane size and cost can be achieved

Impaired response inhibition and excess cortical thickness as candidate endophenotypes for trichotillomania.

This is the author accepted manuscript. the final version is available via Elsevier at http://www.sciencedirect.com/science/article/pii/S0022395614002465.Trichotillomania is characterized by repetitive pulling out of one's own hair. Impaired response inhibition has been identified in patients with trichotillomania, along with gray matter density changes in distributed neural regions including frontal cortex. The objective of this study was to evaluate impaired response inhibition and abnormal cortical morphology as candidate endophenotypes for the disorder. Subjects with trichotillomania (N = 12), unaffected first-degree relatives of these patients (N = 10), and healthy controls (N = 14), completed the Stop Signal Task (SST), a measure of response inhibition, and structural magnetic resonance imaging scans. Group differences in SST performance and cortical thickness were explored using permutation testing. Groups differed significantly in response inhibition, with patients demonstrating impaired performance versus controls, and relatives occupying an intermediate position. Permutation cluster analysis revealed significant excesses of cortical thickness in patients and their relatives compared to controls, in right inferior/middle frontal gyri (Brodmann Area, BA 47 & 11), right lingual gyrus (BA 18), left superior temporal cortex (BA 21), and left precuneus (BA 7). No significant differences emerged between groups for striatum or cerebellar volumes. Impaired response inhibition and an excess of cortical thickness in neural regions germane to inhibitory control, and action monitoring, represent vulnerability markers for trichotillomania. Future work should explore genetic and environmental associations with these biological markers.This research was supported by a grant from the Trichotillomania Learning Center, USA, to Mr. Odlaug; and by a grant from the Academy of Medical Sciences, UK, to Dr. Chamberlain. Neither of these entities had any further role in study design; in the collection, analysis and interpretation of data; in the writing of the report; or in the decision to submit the paper for publication

White matter tract integrity in treatment-resistant gambling disorder

Background Gambling disorder is a relatively common psychiatric disorder recently re-classified within the DSM-5 under the category of ‘substance-related and addictive disorders’. Aims To compare white matter integrity in patients with gambling disorder with healthy controls; to explore relationships between white matter integrity and disease severity in gambling disorder. Method In total, 16 participants with treatment-resistant gambling disorder and 15 healthy controls underwent magnetic resonance imaging (MRI). White matter integrity was analysed using tract-based spatial statistics. Results Gambling disorder was associated with reduced fractional anisotropy in the corpus callosum and superior longitudinal fasciculus. Fractional anisotropy in distributed white matter tracts elsewhere correlated positively with disease severity. Conclusions Reduced corpus callosum fractional anisotropy is suggestive of disorganised/damaged tracts in patients with gambling disorder, and this may represent a trait/vulnerability marker for the disorder. Future research should explore these measures in a larger sample, ideally incorporating a range of imaging markers (for example functional MRI) and enrolling unaffected first-degree relatives of patients.This research was supported by a grant from the National Center for Responsible Gaming to Dr. Grant, and by a grant from the Academy of Medical Sciences to Dr. Chamberlain (UK). Dr. Grant has received research grants from NIMH, National Center for Responsible Gaming, and Forest and Roche Pharmaceuticals Dr. Grant receives yearly compensation from Springer Publishing for acting as Editor-in-Chief of the Journal of Gambling Studies and has received royalties from Oxford University Press, American Psychiatric Publishing, Inc., Norton Press, and McGraw Hill. Dr. Chamberlain consults for Cambridge Cognition. Mr. Odlaug has received a research grant from the Trichotillomania Learning Center, consults for H. Lundbeck A/S, and has received royalties from Oxford University Press. Mr. Leppink and Ms. Derbyshire report no conflicts of interest.This is the author accepted manuscript. The final version is available from the Royal College of Psychiatrists via http://dx.doi.org/10.1192/bjp.bp.115.16550

A combined SAXS/WAXS investigation of the phase behaviour of di-polyenoic membrane lipids

AbstractReal-time measurements of the SAXS/WAXS diffraction patterns of aqueous dispersions (1:1 wt/wt) of the di-polyenoic lipids di-18:2 PC, di-18:3 PC, di-18:2 PE and di-18:3 PE were made over the temperature range 10° to about −80°C. The results of these measurements were compared to similar measurements performed on the corresponding di-18:0 and di-18:1 derivatives. SAXS measurements of the temperature dependence of lamellar repeat distances show that the di-polyenoic lipids undergo broad second-order transitions between their gel and liquid-crystal lamellar phases spanning 30–40°C. The di-18:1 and di-18:0 derivatives, in contrast, undergo abrupt first-order transitions. The gel phases of the di-18:0 derivatives are characterised by two-component WAXS patterns with a sharp component close to 0.42 nm and a broader component at narrower spacings. On cooling, these lipids appear to undergo an initial transition to an Lβ, phase followed by a conversion to an Lc phase. The gel phases of the di-18:1 derivatives also show two-component patterns but with the sharp component centred closer to 0.44 nm. The di-polyenoic lipids, in contrast, are characterised by a single broad peak centred at a spacing of about 0.42 nm, close to that of conventional Lβ, phases. The changes in lamellar repeat distance accompanying the transitions in the di-monoenoic and di-polyenoic lipids, all of which occur in the frozen state, are very similar, indicating that the acyl chains of the polyenoic lipids are close to their maximum extension in the gel state. The WAXS patterns of the polyenoic lipids suggest that the saturated upper parts of the acyl chains are packed on a regular hexagonal lattice while their polyunsaturated termini remain relatively disordered