4,682 research outputs found

    A Nielsen theory for coincidences of iterates

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    As the title suggests, this paper gives a Nielsen theory of coincidences of iterates of two self maps f, g of a closed manifold. The ideas is, as much as possible, to generalize Nielsen type periodic point theory, but there are many obstacles. Many times we get similar results to the "classical ones" in Nielsen periodic point theory, but with stronger hypotheses.Comment: 30 page

    Is the United States Criminal Legal System a Crime Against Humanity?

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    Christopher Kit Wellman, Professor and Chair of the Department of Philosophy, Washington University in St. Louis, explores punishment and the criminal legal system in the United States

    Does the Existing Human Rights Regime Have Political Authority?

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    In this Article I consider whether the existing international legal human rights regime enjoys political authority over sovereign states. In particular, I explore whether, just as states can cite their role as the primary institutions that protect human rights in order to justify their claim to authority over their citizens, perhaps the current human rights regime might plausibly cite its secondary role in securing human rights in order to ground its authority over these states

    English medium higher education in Hong Kong: linguistic challenges of local and non-local students

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    This research project involved a mixed-methods study investigating language-related challenges of first-year students at an English Medium Instruction (EMI) university in Hong Kong. The two-phased sequential study employed a questionnaire survey and semi-structured student interviews. The survey and interview findings indicate that first-year students face a number of language-related academic challenges during their first year at an EMI university in writing, reading, speaking, and listening, many of which appear to stem from lower levels of vocabulary knowledge in English, unfamiliarity with academic and technical terminology, and limited exposure to varieties of English. Additionally, the findings suggest that these challenges can vary significantly based on background and first language, relating specifically to three different demographic student groups: local Hong Kong Cantonese-speaking students, Putonghua-speaking mainland Chinese students, and non-Chinese speaking local and international students

    Lincoln on Secession

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    The recent spate of secessionist conflicts has inspired many of us to return to the classics of political theory for moral guidance on statebreaking. Because Hobbes, Locke, Rousseau, et al. are virtually silent on this topic, however, we look in this paper at the writing of Abraham Lincoln

    A Nielsen theory for coincidences of iterates

    Get PDF
    As the title suggests, this paper gives a Nielsen theory of coincidences of iterates of two self maps f, g of a closed manifold. The ideas is, as much as possible, to generalize Nielsen type periodic point theory, but there are many obstacles. Many times we get similar results to the classical ones in Nielsen periodic point theory, but with stronger hypotheses

    Method of remotely characterizing thermal properties of a sample

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    A sample in a wind tunnel is radiated from a thermal energy source outside of the wind tunnel. A thermal imager system, also located outside of the wind tunnel, reads surface radiations from the sample as a function of time. The produced thermal images are characteristic of the heat transferred from the sample to the flow across the sample. In turn, the measured rates of heat loss of the sample are characteristic of the flow and the sample

    OpenMDAO: Framework for Flexible Multidisciplinary Design, Analysis and Optimization Methods

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    The OpenMDAO project is underway at NASA to develop a framework which simplifies the implementation of state-of-the-art tools and methods for multidisciplinary design, analysis and optimization. Foremost, OpenMDAO has been designed to handle variable problem formulations, encourage reconfigurability, and promote model reuse. This work demonstrates the concept of iteration hierarchies in OpenMDAO to achieve a flexible environment for supporting advanced optimization methods which include adaptive sampling and surrogate modeling techniques. In this effort, two efficient global optimization methods were applied to solve a constrained, single-objective and constrained, multiobjective version of a joint aircraft/engine sizing problem. The aircraft model, NASA's nextgeneration advanced single-aisle civil transport, is being studied as part of the Subsonic Fixed Wing project to help meet simultaneous program goals for reduced fuel burn, emissions, and noise. This analysis serves as a realistic test problem to demonstrate the flexibility and reconfigurability offered by OpenMDAO
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