2,328 research outputs found

    The role of mental health in multiple exclusion homelessness

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    Development of effective policy responding to recent increases in rough sleeping in England requires an understanding of the needs of people experiencing homelessness. Research on multiple exclusion homelessness (MEH) should be central to policy development as it highlights the interactions between ‘homelessness’ and ‘deep social exclusion’. This article focuses on the nexus between mental health and homelessness within MEH. Mixed methods findings from Nottingham, England, are used to investigate the role of mental ill-health in the pathways into MEH. This included a survey of the mental health needs of homeless people and ‘homeless pathway’ interviews. Survey results demonstrated high levels of diagnosed and self-reported mental health issues. Interviews highlighted that mental ill-health and homelessness were closely associated with adverse life experiences and could not be viewed in isolation from them. The article contributes further insight on the specificities of mental health issues, their temporal ordering, and interrelationship with homelessness experiences. between mental health and homelessness within MEH. Mixed methods findings from Nottingham, England, are used to investigate the role of mental ill-health in the pathways into MEH. This included a survey of the mental health needs of homeless people and 'homeless pathway' interviews. Survey results demonstrated high levels of diagnosed and self-reported mental health issues. Interviews highlighted that mental ill-health and homelessness were closely associated with adverse life experiences and could not be viewed in isolation from them. The article contributes further insight on the specificities of mental health issu

    Flight Dynamics Aspects of a Large Civil Tiltrotor Simulation Using Translational Rate Command

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    An in-depth analysis of a Large Civil Tiltrotor simulation with a Translational Rate Command control law that uses automatic nacelle deflections for longitudinal velocity control and lateral cyclic for lateral velocity control is presented. Results from piloted real-time simulation experiments and offline time and frequency domain analyses are used to investigate the fundamental flight dynamic and control mechanisms of the control law. The baseline Translational Rate Command conferred handling qualities improvements over an attitude command attitude hold control law but in some scenarios there was a tendency to enter PIO. Nacelle actuator rate limiting strongly influenced the PIO tendency and reducing the rate limits degraded the handling qualities further. Counterintuitively, increasing rate limits also led to a worsening of the handling qualities ratings. This led to the identification of a nacelle rate to rotor longitudinal flapping coupling effect that induced undesired pitching motions proportional to the allowable amount of nacelle rate. A modification that applied a counteracting amount of longitudinal cyclic proportional to the nacelle rate significantly improved the handling qualities. The lateral axis of the Translational Rate Command conferred Level 1 handling qualities in a Lateral Reposition maneuver. Analysis of the influence of the modeling fidelity on the lateral flapping angles is presented. It is showed that the linear modeling approximation is likely to have under-predicted the side-force and therefore under-predicted the lateral flapping at velocities above 15 ft/s. However, at lower velocities, and therefore more weakly influenced by the side force modeling, the accelerations that the control law commands also significantly influenced the peak levels of lateral flapping achieved

    Handling Qualities of a Large Civil Tiltrotor in Hover using Translational Rate Command

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    A Translational Rate Command (TRC) control law has been developed to enable low speed maneuvering of a large civil tiltrotor with minimal pitch changes by means of automatic nacelle angle deflections for longitudinal velocity control. The nacelle actuator bandwidth required to achieve Level 1 handling qualities in hover and the feasibility of additional longitudinal cyclic control to augment low bandwidth nacelle actuation were investigated. A frequency-domain handling qualities criterion characterizing TRC response in terms of bandwidth and phase delay was proposed and validated against a piloted simulation conducted on the NASA-Ames Vertical Motion Simulator. Seven experimental test pilots completed evaluations in the ADS-33E-PRF Hover Mission Task Element (MTE) for a matrix of nacelle actuator bandwidths, equivalent rise times and control response sensitivities, and longitudinal cyclic control allocations. Evaluated against this task, longitudinal phase delay shows the Level 1 boundary is around 0.4 0.5 s. Accordingly, Level 1 handling qualities were achieved either with a nacelle actuator bandwidth greater than 4 rad/s, or by employing longitudinal cyclic control to augment low bandwidth nacelle actuation

    Rethinking Trust, Reconnecting Us

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    Advancements in online platforms can lead to a more widely informed public, but they also create room for false information. Misinformation about the COVID-19 vaccine has become a public safety issue. Our team created a project that contributes to solving this global problem. Our project’s mission is to tackle vaccine related misinformation. The project utilizes a human-centered method to design a solution. Based on our literature review the main problem is skepticism about getting vaccinated. Our solution is to create an online portal targeted at college students, highlighting the benefits of vaccination, examining examples of misinformation, providing trusted sources for vaccinated and unvaccinated individuals and persuading misinformation receivers to improve their media literacy. Our understanding of the target audience increased via QR code stickers that directed unvaccinated individuals to a survey. This data, alongside student and expert interviews, helped design our platform. The site’s tailored to the concerns of those less likely to receive the vaccine due to misinformation. Part of our campaign is to use Facebook to direct people to our website, which has had nearly 433 views since its launch in February. A stronger future in a virtual world requires sharpening the world\u27s ability to spot misinformation. Our project called upon our target audience to engage in 4 Rs: rethink COVID vaccine information they receive, re-evaluate information by fact-checking, reconsider getting vaccinated so that they can reconnect with their family and friends safely. We built an internationally accessible website, fostered an accepting online environment for education and asking questions to a healthcare professional, increased awareness of COVID-19 misinformation, connected individuals with different perspectives on vaccinations, encouraged young people to improve their media literacy, developed an appealing brand for vaccine-hesitant young people, contributed to research about campaign strategies for reducing vaccine hesitancy, and we’ve sparked a global conversation

    An Investigation of Large Tilt-Rotor Hover and Low Speed Handling Qualities

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    A piloted simulation experiment conducted on the NASA-Ames Vertical Motion Simulator evaluated the hover and low speed handling qualities of a large tilt-rotor concept, with particular emphasis on longitudinal and lateral position control. Ten experimental test pilots evaluated different combinations of Attitude Command-Attitude Hold (ACAH) and Translational Rate Command (TRC) response types, nacelle conversion actuator authority limits and inceptor choices. Pilots performed evaluations in revised versions of the ADS-33 Hover, Lateral Reposition and Depart/Abort MTEs and moderate turbulence conditions. Level 2 handling qualities ratings were primarily recorded using ACAH response type in all three of the evaluation maneuvers. The baseline TRC conferred Level 1 handling qualities in the Hover MTE, but there was a tendency to enter into a PIO associated with nacelle actuator rate limiting when employing large, aggressive control inputs. Interestingly, increasing rate limits also led to a reduction in the handling qualities ratings. This led to the identification of a nacelle rate to rotor longitudinal flapping coupling effect that induced undesired, pitching motions proportional to the allowable amount of nacelle rate. A modification that counteracted this effect significantly improved the handling qualities. Evaluation of the different response type variants showed that inclusion of TRC response could provide Level 1 handling qualities in the Lateral Reposition maneuver by reducing coupled pitch and heave off axis responses that otherwise manifest with ACAH. Finally, evaluations in the Depart/Abort maneuver showed that uncertainty about commanded nacelle position and ensuing aircraft response, when manually controlling the nacelle, demanded high levels of attention from the pilot. Additional requirements to maintain pitch attitude within 5 deg compounded the necessary workload
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