1,890 research outputs found

    Nonlinear Galactic Dynamos and the Magnetic Pitch Angle

    Get PDF
    Pitch angles pp of the large-scale magnetic fields B‾\overline{\bf{\it{B}}} of spiral galaxies have previously been inferred from observations to be systematically larger in magnitude than predicted by standard mean-field dynamo theory. This discrepancy is more pronounced if dynamo growth has saturated, which is reasonable to assume given that such fields are generally inferred to be close to energy equipartition with the interstellar turbulence. This 'pitch angle problem' is explored using local numerical mean-field dynamo solutions as well as asymptotic analytical solutions. It is first shown that solutions in the saturated or kinematic regimes depend on only five dynamo parameters, two of which are tightly constrained by observations of galaxy rotation curves. The remaining 3-dimensional (dimensionless) parameter space can be constrained to some extent using theoretical arguments. Predicted values of ∣p∣|p| can be as large as ∼40∘\sim40^\circ, which is similar to the largest values inferred from observations, but only for a small and non-standard region of parameter space. We argue, based on independent evidence, that such non-standard parameter values are plausible. However, these values are located toward the boundary of the allowed parameter space, suggesting that additional physical effects may need to be incorporated. We therefore suggest possible directions for extending the basic model considered.Comment: 11 pages, 5 figures, 1 table, edited to match ApJ versio

    Architecture for Health: Palliative Care Centre Design for Medical Staff

    Get PDF
    Working in palliative care is regarded as one of the toughest roles within healthcare. Current literature surrounding architecture and health has focused on patient wellbeing. However, this study looks at the impact of palliative care centre design on medical staff and seeks to understand if the design of palliative care centres could improve the wellbeing of medical staff, potentially mitigating some of the psychological stress inherent in the workplace. Presenting the question: could more staff-centric design lead to a more resilient workforce potentially enabling the delivery of higher quality patient care? This research rests on a multidisciplinary approach, consisting of a structuralist, post-structuralist and social-positivist methodology. A structuralist approach will investigate the binary opposition between staff and patient wellbeing; post-structuralist outlook will invert the viewpoints and shift the focus from patient to staff wellbeing. Finally, a questionnaire attained staff design ideas to act as a blueprint for the design of future centres. Due to the gap in the existing literature, this study is an important step in providing a deeper understanding of burnout, compassion fatigue and vicarious trauma. If such issues were further understood, architecture could be used to support the workforce within palliative care improving resilience and retention rate. Results of this study show all participants believe that design could mitigate the psychological stress of the job, making tasks easier and improving high-quality patient care. Due to the limited scope of the study, the questionnaire sample size is relatively small; however, it highlighted the potential need for further research

    Political Equality and First Amendment Challenges to Labor Law

    Get PDF
    This Article conceptualizes a novel basis for defending laws that strengthen labor unions from First Amendment challenge: the argument that these laws are adequately tailored to advancing a compelling state interest in reducing economic inequality’s transmission into political inequality. The Article makes two principal contributions. First, it updates criticisms of the Supreme Court’s campaign finance decisions’ rejection of any compelling interest sounding in political equality. The Article does so by bringing recent constitutional scholarship to bear on that criticism and by explaining how recent improvements in social scientists’ ability to track different economic brackets’ political influence call for the Court to reexamine the prudential concerns that motivated the Court to reject such an interest. Second, the Article is novel in conceptualizing how the interest in reducing economic inequality’s transmission into political inequality could provide a basis for defending union-strengthening laws that have faced, currently face, or may soon face First Amendment challenge. To show that such laws are quite plausibly adequately tailored to advancing this interest, the Article explains how unions reduce wealth-based distortions of political influence both by reducing economic inequality through collective bargaining and by organizing political power among low-income and middle-class workers. This dual mechanism distinguishes union-strengthening laws from other methods of reducing wealth-based political inequality. The Article focuses especially on showing why this distinction means proposals to reduce economic inequality through tax and transfer are likely not less restrictive alternatives to First Amendment-impinging laws that strengthen unions

    The Architectural Drawing

    Get PDF
    It is the intent of this investigation to explore the translation which occurs between architectural drawing and built architecture. This translation occurs over a gap which exists between the realm of conception and the realm of construction. All forms of architectural representation (drawings, computer or physical models) bridge theis gap in some way and, by doing so, translate architectural meaning

    Estimation of nonseparable models with censored dependent variables and endogenous regressors

    Get PDF
    In this article we develop a nonparametric estimator for the local average response of a censored dependent variable to endogenous regressors in a nonseparable model where the unobservable error term is not restricted to be scalar and where the nonseparable function need not be monotone in the unobservables. We formalize the identification argument put forward in Altonji, Ichimura, and Otsu (2012 Altonji, J. G., Ichimura, H., Otsu, T. (2012). Estimating derivatives in nonseparable models with limited dependent variables. Econometrica 80:1701–1719. [CrossRef], [Web of Science ®] ), construct a nonparametric estimator, characterize its asymptotic property, and conduct a Monte Carlo investigation to study its small sample properties. Identification is constructive and is achieved through a control function approach. We show that the estimator is consistent and asymptotically normally distributed. The Monte Carlo results are encouraging
    • …
    corecore