502 research outputs found

    Merleau-Ponty and Nishida: "interexpression" as motor-perceptual faith

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    This essay places Nishida Kitarō in dialogue with Maurice Merleau-Ponty regarding motor-perceptual aspects of artistic expression, and seeks to expand their concepts of negation from a perceptual to a motor-perceptual form of negation. This allows for a corresponding expansion of Merleau-Ponty’s notion of “perceptual faith” (foi perceptive) to motor-perceptual faith, and demonstrates how this concept resonates with the faithful form of expression put forth in Nishida’s concept “interexpression” (表現的関係)

    The Effect of Grain Refinement on the Castability of Magnesium-Aluminium Alloys

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    Rapidly increasing fuel prices and global pressures to reduce the harmful effects of vehicle emissions are forcing vehicle manufacturers to look at alternative materials to reduce the mass of the vehicles they produce. This has led to an increase in the research and development of magnesium alloys for use in automotive applications, and the methods used to produce them. With a density two-thirds that of aluminium alloys, and one quarter that of steel, magnesium alloys are continually being investigated as possible replacements for the production of automotive castings such as wheels and engine blocks. However, there is presently a lack of understanding of the effects of common alloy additions that refine the as-cast microstructure on the castability of the casting alloys in question. The most popular magnesium alloys for large automotive castings are based on the magnesium-aluminium alloy system. For the work presented in this thesis, two of the most common Mg-Al alloys, AZ91E and AM60B, were chosen to determine the effect of grain refinement on the castability of Mg-Al alloys. An experimental mould has been designed and developed to emulate the geometry, filling, and solidification of an alloy wheel casting. Two different grain refiners were investigated at varying addition levels to determine the effect of different levels of grain refinement on the castability of the two alloys. Castability, defined as the ability to produce sound castings from a particular alloy, has been assessed through visual examination of external casting defects, X-ray radiography of internal defects, as well as grain size and porosity level analysis of all samples produced. It has been found that for both AZ91E and AM60B, an increase in the level of grain refinement achieved lead to an increase in the occurrence and severity of the surface slumping defect in the castings produced. Conversely, increased levels of grain refinement were found to reduce or totally eliminate the occurrence of the hot tearing defect in both alloys. Contrary to popular belief, grain refinement was found to increase the level of internal shrinkage porosity in the Mg-Al castings. This was especially the case in the poorly fed regions of the casting, such as the junction between the spoke and rim sections. This is due to the increased reliance on interdendritic feeding of liquid to compensate for shrinkage during the latter stages of solidification in such areas, where solidification does not proceed directionally towards the feeding reservoirs. An increase in the level of grain refinement means the interdendritic network becomes heavily constricted, resulting in a rapid increase in the feeding pressure required to feed metal to the areas where it is required. This study has also resulted in the development of a novel method of successfully and consistently introducing carbon to a Mg-Al alloy melt. This has in the past been identified as a major issue to overcome when adding carbon based grain refiners to Mg-Al alloy melts

    Expression and Bodily Faith in Natalie Heller’s First Impressions

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    In this essay I place choreographer Natalie Heller in dialogue with Merleau-Ponty on issues of motor-perception, expression and bodily faith. I analyze her new work First Impressions to demonstrate how she responds to a similar impulse that drove Merleau-Ponty’s phenomenology, particularly in his last writing, The Visible and the Invisible. Both Heller and Merleau-Ponty seek to go beyond the representational understanding of motion and perception in order to articulate and experiment with a type of expression, which is beyond the distinctions between motion and motionlessness, activity and passivity, visibility and invisibility. While Merleau-Ponty writes about this form of expression, Heller’s performers show that beyond these binaries is a form of expression that is ambiguously situated between impressing and being impressed upon, and that to engage the world or the city as such, requires a motor-perceptual form of faith

    Effect of Airfoil-Preserved Undulations on Wing Performance and Wingtip Vortex

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    The effect of undulation placement (leading edge, trailing edge, leading and trailing edge) on the wing performance and the wingtip vortex was investigated. Experiments were performed at the University of Dayton Low Speed Wind Tunnel (UD-LSWT) on undulated wings where the NACA 0012 airfoil cross-section is preserved along the wingspan. Sensitivity studies were done on the undulation wavelength along the span (λ/c 0.31, 0.21 and 0.15) and undulation placement (leading edge, trailing edge, and both leading and trailing edge). The leading edge undulations delayed stall until higher angles of attack, however, the maximum aerodynamic efficiency was reduced. The trailing edge undulated wing on the other hand increased the maximum aerodynamic efficiency but was not successful in stall mitigation. Wings with both leading and trailing edge undulations showed improvement in aerodynamic efficiency as well as delayed stall. The effect of the undulations on the wingtip vortex was also investigated through Particle Image Velocimetry (PIV). For the same coefficient of lift, the undulated wing cases reduced the wingtip vortex circulation by 25%. Investigations into the wingtip vortex core RMS and aerodynamic efficiency revealed a direct relationship where a higher vortex core RMS resulted in a higher aerodynamic efficiency and vice-versa

    Is Oksapmin Ok? A study of the genetic relatedness of Oksapmin and the Ok languages

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    In this paper evidence is provided that suggests the Oksapmin language, previously classed as constituting an isolate within the larger Trans New Guinea family, is related to the Mountain Ok branch of the Ok language family and, by extension, the entire Ok family. A list of cognates and sound correspondences is given, as well as evidence from bound morphology and pronoun paradigms

    'Greenfield' sites in brownfield locations: creating 'new' HR systems through managing 'old' HR problems

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    Analysis of Hydrogen Cyanide Hyperfine Spectral Components towards Star Forming Cores

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    Although hydrogen cyanide has become quite a common molecular tracing species for a variety of astrophysical sources, it, however, exhibits dramatic non-LTE behaviour in its hyperfine line structure. Individual hyperfine components can be strongly boosted or suppressed. If these so-called hyperfine line anomalies are present in the HCN rotational spectra towards low or high mass cores, this will affect the interpretation of various physical properties such as the line opacity and excitation temperature in the case of low mass objects and infall velocities in the case of their higher mass counterparts. This is as a consequence of the direct effects that anomalies have on the underlying line shape, be it with the line structural width or through the inferred line strength. This work involves the first observational investigation of these anomalies in two HCN rotational transitions, J=1!0 and J=3!2, towards both low mass starless cores and high mass protostellar objects. The degree of anomaly in these two rotational transitions is considered by computing the ratios of neighboring hyperfine lines in individual spectra. Results indicate some degree of anomaly is present in all cores considered in our survey, the most likely cause being line overlap effects among hyperfine components in higher rotational transitions.Comment: 8th Serbian Conference on Spectral Line Shapes in Astrophysics, Divicibare; 8 pages, 5 figure

    Designing a HR system: pitfalls, possibilities and performance

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    strands and themes as researchers wrestle with the issues that emerge and the questions that are raised by the various studies that have now been conducted. The problems and difficulties- both methodological and conceptual- that are intertwined within this debate have been well documented (Purcell, 1999; Legge, 2001) and many unresolved issues still remain. At the same time, while much more is now known about HRM and performance issues, 'there appears to be a major "disconnect " between what the research literature says that firms should do and what firms actually do ' (Becker and Gerhart, 1996:796). Becker and Gerhart argue that 'there needs to be better communication between the academic and management communities so that research findings can have a greater influence on actual policy'. They also suggest that 'more effort should be devoted to finding out what managers are thinking and why they make the decisions they do ' (p.796). One manager who is a key player in this debate is the HR manager who has a critical role in the design of the HR system and who may have to shoulder the blame if that system does not operate successfully4. While the HR manager generally inherits th
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