Evaluation of Unmanned Aircraft Flying Qualities Using a Stitched Learjet Model

In recent years, military UAVs have taken over missions that were too dull, dirty, or dangerous for manned aircraft. The increased demand has led to a build-fly-fix-fly development mentality, plaguing the early lifecycle with staggering mishap rates. Currently, MIL-STD-1797 lists flying qualities for UAVs as TBD, and the standards for manned fixed wing are inadequate when applied to UAVs. In an effort to expand the database of UAV flying qualities, an analysis was completed on a Simulink model of an LJ-25D developed from Calspans Variable Stability System aircraft at the United States Test Pilot School. Three maneuvers were simulated: (1) a non-precision, non-aggressive climbing spiral, (2) a precision, non-aggressive side step landing, and (3) a precision, non-aggressive aerial refueling task. These maneuvers were chosen to evaluate the performance and workload of the aircraft as four stability and control parameters were scaled. The data were utilized in identifying trends between the scaled stability and control parameters and resulting workload and performance metrics. Thumbprint plots were generated to identify Level 1, Level 2, and Level 3 flying qualities and compared to MIL-STD-1797 plots. Results point to utilizing a combination of classical aircraft literal factors, such as ςsp and CAP, with newly developed mathematical techniques, such as L2 norm and TIC, to assess the workload of the flight controller and performance during the maneuver

THE IMITATION OF ROMAN CATHOLIC AND BYZANTINE CHANT IN ĒRIKS EŠENVALDS’S PASSION AND RESURRECTION

Ēriks Ešenvalds is an early twenty-first century composer who has been commissioned to write works for some of the most noteworthy ensembles in the world. Having written over 100 compositions to date, 72 of which are choral pieces, Ešenvalds is quickly becoming one of the most prolific and significant composers of his time. He currently works as a full-time composer out of Riga, Latvia. Ešenvalds’s choral works are primarily unaccompanied, while some include brass band, saxophone quartet, percussion, or orchestral accompaniment. Textures vary from three to twelve voice parts. His oratorio Passion and Resurrection (2005), written for soprano solo, SATB quartet, SATB chorus, SS soli, and strings, is an amalgamation of compositional techniques drawn from all eras of music history. This project identifies characteristics of Roman Catholic and Byzantine chant that are imitated throughout Passion and Resurrection. A succinct history of both styles is presented along with a detailing of Ešenvalds’s compositional technique and an overview of his oratorio. Aspects of form, melody, text, rhythm, harmony, and texture present in each movement are also discussed. This study provides conductors with insight into the chant-like aspects of Ešenvalds’s work and any influences on performance. Listings of notable Passion settings and Ešenvalds’s choral output are also included

A pragmatic cluster randomised controlled trial of an oral health intervention for people with serious mental illness (three shires early intervention dental trial).

People with mental illness have poor oral health compared to those without due to medication side effects, issues with self-care, barriers to treatment and poor recognition of dental problems. Guidelines recommend giving oral health advice and monitoring oral health for people with mental illness, but this is not reflected in current practice and Cochrane reviews found no existing randomised trials of these interventions

Saudi service users’ perceptions and experiences of the quality of their mental health care provision in the Kingdom of Saudi Arabia (KSA): A qualitative inquiry

© 2020 The Authors. International Journal of Mental Health Nursing published by John Wiley & Sons Australia, Ltd on behalf of Australian College of Mental Health Nurses Inc This paper presents, as part of a larger mixed-methods design, a study generating a theoretical understanding of issues pertinent to the quality of mental health care in the KSA from the perspective of those using services. Semi-structured interviews were undertaken with thirty service users admitted to inpatient psychiatric wards, using an interview guide developed by the researchers, based on relevant literature. Findings from the thematic analysis showed five themes: (1) The hospital as a prison: a custody versus care dilemma, (2) quality of interactions between staff and service users, (3) quality of services, (4) staff qualities and (5) suggestions for achieving quality of care. A theoretical model drawing upon Donabedian Health Care Model for Evaluating quality of care and the Andersen Behavioural Model of Health Service Use is evident from the data. Structural aspects of care include staff experience and qualifications and key enablers around social and financial support, service users’ health needs and status and the physical infrastructure and ward rules. These drive processes of care based upon robust rates of interaction between staff and service users and appear central to quality of mental health care in KSA. Quality of mental health care in KSA is manifested by a therapeutic ethos with a high degree of interaction between professional carers and service users, with the former being highly educated, competent, compassionate, with a high degree of self-awareness, and specialized in mental health. We have uncovered elements of Fanon and Azoulay’s ‘Cultural Originality’ as well as contemporary examples of Goffman’s mortification of the self

The feasibility of nurse-delivered, low-intensity cognitive behavioural therapy for irritable bowel syndrome.

Introduction: This study assessed the feasibility of nurse-delivered cognitive behavioural therapy (CBT) for the treatment of irritable bowel syndrome (IBS). Methods and analysis: A mixed-method design was used, and 20 participants were randomly allocated to high-intensity CBT (n=5), guided self-help (n=5), self-help only (n=5) or treatment as usual (n=5). Ten intervention participants completed semi-structured interviews. Quantitative data were analysed using descriptive statistics; qualitative data were analysed using group thematic analysis. Results: Barriers to the interventions were lack of therapist contact, negative preconceptions about treatment and factors relating to supporting materials. Treatment facilitators included therapist-facilitated relaxation, narratives located within self-help materials and social support mechanisms. Conclusion: Further development of the low-intensity interventions in collaboration with service users is required to improve intervention acceptability and relevance.N/

A stratospheric pathway linking a colder Siberia to Barents-Kara Sea sea ice loss

Previous studies have extensively investigated the impact of Arctic sea ice anomalies on the midlatitude circulation and associated surface climate in winter. However, there is an ongoing scientific debate regarding whether and how sea ice retreat results in the observed cold anomaly over the adjacent continents. We present a robust “cold Siberia” pattern in the winter following sea ice loss over the Barents-Kara seas in late autumn in an advanced atmospheric general circulation model, with a well-resolved stratosphere. Additional targeted experiments reveal that the stratospheric response to sea ice forcing is crucial in the development of cold conditions over Siberia, indicating the dominant role of the stratospheric pathway compared with the direct response within the troposphere. In particular, the downward influence of the stratospheric circulation anomaly significantly intensifies the ridge near the Ural Mountains and the trough over East Asia. The persistently intensified ridge and trough favor more frequent cold air outbreaks and colder winters over Siberia. This finding has important implications for improving seasonal climate prediction of midlatitude cold events. The results also suggest that the model performance in representing the stratosphere-troposphere coupling could be an important source of the discrepancy between recent studies

Coherent, time-shifted patterns of microstructural plasticity during motor-skill learning

Motor skill learning relies on neural plasticity in the motor and limbic systems. However, the spatial and temporal characteristics of these changes-and their microstructural underpinnings-remain unclear. Eighteen healthy males received 1 hour of training in a computer-based motion game, 4 times a week, for 4 consecutive weeks, while 14 untrained participants underwent scanning only. Performance improvements were observed in all trained participants. Serial myelin- and iron-sensitive multiparametric mapping at 3T during this period of intensive motor skill acquisition revealed temporally and spatially distributed, performance-related microstructural changes in the grey and white matter across a corticospinal-cerebellar-hippocampal circuit. Analysis of the trajectory of these transient changes suggested time-shifted cascades of plasticity from the dominant sensorimotor system to the contralateral hippocampus. In the cranial corticospinal tracts, changes in myelin-sensitive metrics during training in the posterior limb of the internal capsule were of greater magnitude in those who trained their upper limbs vs. lower limb trainees. Motor skill learning is associated with waves of grey and white matter plasticity, across a broad sensorimotor network

Pragmatic randomised controlled trial of an exercise programme to improve wellbeing outcomes in women with depression: findings from the qualitative component

This paper reports the qualitative component from a pragmatic randomized controlled trial (PRCT), the quantitative component is reported in Callaghan, Khalil, Morres and Carter (2011). Exercise may be effective in treating depression, but trials testing its effect in depressed women are rare. Our previous research found that standard exercise programmes, prescribed by General Practitioners and based on national guidelines of intensity levels thought to produce health benefits, are not suitable for this group, as they find them discouraging and lonely, with many dropping out very early on. Exercise that is matched to participants’ preferred intensity improves mental health outcomes and attrition rates. Our aim was to develop such a programme. This study addressed the question: does mentored exercise of preferred intensity lead to better psychological, physiological and social wellbeing outcomes and improved adherence rates when compared with exercise of prescribed intensity in 38 depressed women? Focus groups were conducted with participants from both arms of the study, to explore their experience of the exercise programme and to gather information that might help to explain the quantitative outcomes, a technique recommended by previous researchers conducting pragmatic trials. Women in the experimental programme experienced a statistically significant improvement in their mood, physical health, sense of wellbeing, self-esteem and quality of life. They reported achieving these gains via a positive experience which encouraged continued attendance. In contrast, women who received the “exercise as usual” programme experienced no significant benefits, were less likely to continue attending, and markedly less enthusiastic

Making data a first class scientific output : data citation and publication by NERC's Environmental Data Centres

The NERC Science Information Strategy Data Citation and Publication project aims to develop and formalise a method for formally citing and publishing the datasets stored in its environmental data centres. It is believed that this will act as an incentive for scientists, who often invest a great deal of effort in creating datasets, to submit their data to a suitable data repository where it can properly be archived and curated. Data citation and publication will also provide a mechanism for data producers to receive credit for their work, thereby encouraging them to share their data more freely