919 resultados para Claudio de Turín


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The dynamics of predator-prey pursuit appears complex, making the development of a framework explaining predator and prey strategies problematic. We develop a model for terrestrial, cursorial predators to examine how animal mass modulates predator and prey trajectories and affects best strategies for both parties. We incorporated the maximum speed-mass relationship with an explanation of why larger animals should have greater turn radii; the forces needed to turn scale linearly with mass whereas the maximum forces an animal can exert scale to a 2/3 power law. This clarifies why in a meta-analysis, we found a preponderance of predator/prey mass ratios that minimized the turn radii of predators compared to their prey. It also explained why acceleration data from wild cheetahs pursuing different prey showed different cornering behaviour with prey type. The outcome of predator prey pursuits thus depends critically on mass effects and the ability of animals to time turns precisely.

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This paper presents the application of the on-load exciting current Extended Park's Vector Approach for diagnosing incipient turn-to-turn winding faults in operating power transformers. Experimental and simulated test results demonstrate the effectiveness of the proposed technique, which is based on the spectral analysis of the AC component of the on-load exciting current Park's Vector modulus.

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This is a critical reading of the current literature on law and geography. The article argues that the literature is characterized by an undertheorization of the concept of space. The focus is either on the specific geography of law in the form of jurisdiction, or as a simple terminological innovation. Instead, the article suggests that law’s spatial turn ought to consider space as a singular parameter to the hitherto legal preoccupation with time, history and waiting. This forces law into dealing with a new, peculiarly spatial kind of uncertainty in terms of simultaneity, disorientation, materiality and exclusionary corporeal emplacement. The main area in which this undertheorization forcefully manifests itself is that of spatial justice. Despite its critical potential, the concept has been reduced by the majority of the relevant literature into another version of social, distributive or regional justice. On the contrary, if the peculiar characteristics of space are to be taken into account, a concept of justice will have to be rethought on a much more fundamental level than that.

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This introduction firstly discusses the ongoing paradigm shift in the study of transnational migration, in particular the emergent interest in the convergence of migration and material culture as the starting point of our investigation. Then it highlights three aspects that this Special Issue could further in the current study of migration and materialities: namely, historical consciousness in materialising migration experiences and the notion of generational transmission; the everyday experience of body as the site for mutual constitution between subject and object; and the unique value of a language-based, interdisciplinary-oriented approach for migration studies. In the final part, it summarizes the four articles that follow, highlighting the contribution that each makes to our overall objective of making a ‘material turn’ in migration studies, and discusses some ways it could be further developed.

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Nas últimas décadas, as ciências sociais e humanas têm despertado para a acção modeladora das estruturas sobre a percepção humana. O debate académico sobre o relativismo cultural dos modelos de percepção tem levado investigadores das várias áreas a debruçarem-se sobre o estudo dos sentidos. Correntes disciplinares como a antropologia ou história dos sentidos vêm sintetizando a dimensão estrutural e fenomenológica, a partir da compreensão do carácter biológico e cultural da experiência sensorial. Nesse sentido, tem emergido uma nova história da arte que contraria as últimas décadas de predomínio da linguística e semiótica, em função da compreensão da performance das imagens ligada à percepção sensorial. Questiona-se o totalitarismo que o método iconográfico/iconológico de Panofsky tem encontrado na historiografia da arte, a partir da ideia de que as imagens antes de um significado são uma acção, antes de uma função são um uso.

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Issued by the Board of Trade, Welland, Ontario.

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Issued by the Board of Trade, Welland, Ontario.

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Issued by the Board of Trade, Welland, Ontario.

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A poster produced by "A Provincial Educational Project of the Ontario Temperance Federation" for an event called "Teen-Age Turn-Out". The event is to take place at Cornwall Armouries.

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Tesis (Maestría en Ciencias de la Administración con Especialidad en Producción y Calidad) U.A.N.L.

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UANL

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Mémoire numérisé par la Division de la gestion de documents et des archives de l'Université de Montréal