5,223 research outputs found

    The Objectivity of Ordinary Life

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    Metaethics tends to take for granted a bare Democritean world of atoms and the void, and then worry about how the human world that we all know can possibly be related to it or justified in its terms. I draw on Wittgenstein to show how completely upside-down this picture is, and make some moves towards turning it the right way up again. There may be a use for something like the bare-Democritean model in some of the sciences, but the picture has no standing as the basic objective truth about the world; if anything has that standing, it is ordinary life. I conclude with some thoughts about how the notion of bare, ā€œthinā€ perception of non-evaluative reality feeds a number of philosophical pathologies, such as behaviourism, and show how a ā€œthickerā€, more value-laden, understanding of our perceptions of the world can be therapeutic against them

    Active control with dielectric barrier discharge actuators applied to high-lift devices

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    An experimental investigation examined the capability of dielectric barrier discharge (DBD) actuators to control a high-lift device system. Aerodynamic tests investigated the potential of utilising the actuator to control the flap side-edge vortex flow field. Acoustic tests examined the attenuation of slat noise with a DBD actuator. The sparse knowledge related to the control of a vortex flow field with a DBD actuator necessitated a more fundamental study that used a NACA 0015 wing. From this study, it was shown that the application of control resulted in a more diffused tip vortex. The actuator's ability to control the evolving vortex flow field was weakly dependent on the Reynolds number but strongly dependent on the angle of attack. Consequently, a DBD actuator was applied to a flap side edge. However, it was concluded that the actuator had no discernible effect on the flow field due to its addition of momentum being too low to destabilise the formation of the flap side-edge vortex. The slat research concerned the attenuation of the leading-edge component of high-lift device noise. At an angle of attack of two degrees, several tonal noise components with broadband content appeared in the slat noise spectrum. These noise features were successfully suppressed with a DBD actuator operating in open-loop control. For closedloop control, a quasi-static feedback controller was implemented. Comparable levels of performance were obtained for both control methods with more than a 20 dB reduction achieved in the dominant tonal noise feature. The research conducted shed new light on the application of DBD actuators to control the high-lift device system. However, further research is needed if the device is to be utilised to control flap side-edge flow field. The attenuation of slat tonal noise with broadband content was achieved with the actuator

    Black and Minority Ethnic Trainees' Experiences of Physical Education Initial Teacher Training: Report to the Training and Development Agency

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    Problem-Based Learning and Competency Development.

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    Problem-based learning is an approach to professional education which has been used by a number of educational institutions involved in professional education both here and overseas. The most famous example in Australia is probably the medical course at the University of Newcastle. This paper argues that this initiative in professional education has within it characteristics which are sympathetic to many of the current moves in Australia to describe, and in some cases redefine, professional work. This process is part of a wider move in Australia to upgrade and improve the skills and abilities of the Australian workforce in the context of economic refor

    Perforation of Bowel Associated with Blunt Abdominal Trauma in Children

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    Motor vehicle accidents remain the commonest cause of abdominal trauma in children, but there are many situations that expose the child more particularly to blunt abdominal trauma. In order to avoid unnecessary delay in diagnosis, a plan of management is proposed, based on our experience with 4 cases of abdominal trauma. The need for early diagnosis is emphasised
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