327,901 research outputs found

    Korematsu and Beyond: Japanese Americans and the Origins of Strict Scrutiny

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    The authors examine the role that the Japanese American Citizens League played in the development of the strict scrutiny doctrine partly responsible for the ruling in Brown v. Board of Education. The plight of Japanese Americans during their WWII internment gave them experience in implementing this doctrine, which they passed on to the NAACP

    Methodological considerations of integrating portable digital technologies in the analysis and management of complex superimposed Californian pictographs: From spectroscopy and spectral imaging to 3-D scanning

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    How can the utilization of newly developed advanced portable technologies give us greater understandings of the most complex of prehistoric rock art? This is the questions driving The Gordian Knot project analysing the polychrome Californian site known as Pleito. New small transportable devices allow detailed on-site analyses of rock art. These non-destructive portable technologies can use X-ray and Raman technology to determine the chemical elements used to make the pigment that makes the painting; they can use imaging techniques such as Highlight Reflective Transformation Imaging and dStretchĀ© to enhance their visibility; they can use digital imagery to disentangle complex superimposed paintings; and they can use portable laser instruments to analyse the micro-topography of the rock surface and integrate these technologies into a 3-D environment. This paper outlines a robust methodology and preliminary results to show how an integration of different portable technologies can serve rock art research and management

    Parametrization of global attractors experimental observations and turbulence

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    This paper is concerned with rigorous results in the theory of turbulence and fluid flow. While derived from the abstract theory of attractors in infinite-dimensional dynamical systems, they shed some light on the conventional heuristic theories of turbulence, and can be used to justify a well-known experimental method. Two results are discussed here in detail, both based on parametrization of the attractor. The first shows that any two fluid flows can be distinguished by a sufficient number of point observations of the velocity. This allows one to connect rigorously the dimension of the attractor with the Landauā€“Lifschitz ā€˜number of degrees of freedomā€™, and hence to obtain estimates on the ā€˜minimum length scale of the flowā€™ using bounds on this dimension. While for two-dimensional flows the rigorous estimate agrees with the heuristic approach, there is still a gap between rigorous results in the three-dimensional case and the Kolmogorov theory. Secondly, the problem of using experiments to reconstruct the dynamics of a flow is considered. The standard way of doing this is to take a number of repeated observations, and appeal to the Takens time-delay embedding theorem to guarantee that one can indeed follow the dynamics ā€˜faithfullyā€™. However, this result relies on restrictive conditions that do not hold for spatially extended systems: an extension is given here that validates this important experimental technique for use in the study of turbulence. Although the abstract results underlying this paper have been presented elsewhere, making them specific to the Navierā€“Stokes equations provides answers to problems particular to fluid dynamics, and motivates further questions that would not arise from within the abstract theory itself

    The philosophy of perceptions a Wittgensteinian perspective

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    The aim of this thesis is to balance a positive account of the family of concepts included in and logically involved with the concept of perception, with critical considerations of accounts that are philosophically problematic. The problematic accounts in question will range from those of Wittgensteinā€™s contemporaries, or near contemporaries, such as Russell, Janes and Kohler, to those of psychologists and philosophers of our own time, some, but not all, of whom profess to embrace Wittgensteinā€™s position; these will include the authors of a standard textbook on visual perception (Bruce and Green), Quine, Peacocke, Vesey, Anscombe, Martin, McDowell, Mulhall and Candlish, Additionally, the general nature of the problems in question will be reflected in a positive account of the concepts of acceleration (chapter 1), identity and personal identity (chapter 5), in relation to problematic accounts given by Leibniz and Parfit respectively. Crucial to this aim will be an interpretation of Wittgensteinā€™s position that is distinct from all those positions that profess to be Wittgensteinian, but that in fact remain in the grip of the very Cartesian / empiricist preconceptions that Wittgenstein diagnoses as the source of the problems. This will be the key to the positive account, and will depend on showing that Wittgenstein's diagnosis is essentially the same for all problems of a philosophical nature, despite its highly specific application to problems concerning various concepts in different parts of the Investigations, whose subtle differences it is equally important to discern clearly

    Genocide, War Crimes, Crimes Against Humanity

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    This article examines such violations of international human rights as genocide, war crimes, and crimes against humanity. In Part I, the author explores the nature and uniqueness of these crimes. In Part II, the author suggests possible courses of action the international community can take and improvements that can be made in response. Finally, Part III analyzes methods of preventing such crimes from occurring

    Jacob Lawrence, Birth, 1948

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