217 research outputs found

    Estimating the Returns of Whisky: A Comparison of the Repeat Sales, Hedonic, and Hybrid Models

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    当人们对葡萄酒和艺术品的收藏价值回报广泛研究的时候,威士忌作为潜在的投资对象最近出现在人们的眼前。因为其创纪录的出售价格,威士忌已经成为新闻头条。在这项研究中,根据来自Bonhams和Mctear’s拍卖会的拍卖数据,我们对2008年至2012年的威士忌价值回报进行研究。 对于收藏品价值回报的估算,其中一个需要考虑的重要因素是合理的模型选择。在以前的收藏品研究中,针对价值回报的估算,特征价格模型和重复销售模型等曾是比较热门的选择,另外一种新的采取前两种模型优势的混合模型也被使用。本篇论文使用这三种模型去估算威士忌的价值回报。从中我们发现最有效的模型是混合模型。在整个研究过程中,通过使用该模型...While the returns to collectibles such as wine and art have been studied extensively, whisky has only recently emerged as a potential investment vehicle. Whisky has been making headlines as bottles are being sold at record prices. In this study, we examine the returns to whisky from 2008-2012, using auction data from Bonhams and Mctear’s. One of the most important considerations when estim...学位:金融硕士院系专业:王亚南经济研究院_金融学(含保险学)学号:2772011115439

    Engineering Virus Like Particles Towards Directing Immunologic Responses

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    This poster was presented during the 3rd Annual UT Tyler Faculty Research Poster Showcase.https://scholarworks.uttyler.edu/fac_posters/1008/thumbnail.jp

    Manipulation of Virus-Like Particles for the Purpose of Optimizing Immunostimulation

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    This poster was presented at the Great Plains Honors Conference in South Padre Island, Texas.https://scholarworks.uttyler.edu/student_posters/1015/thumbnail.jp

    The twilight of the Liberal Social Contract? On the Reception of Rawlsian Political Liberalism

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    This chapter discusses the Rawlsian project of public reason, or public justification-based 'political' liberalism, and its reception. After a brief philosophical rather than philological reconstruction of the project, the chapter revolves around a distinction between idealist and realist responses to it. Focusing on political liberalism’s critical reception illuminates an overarching question: was Rawls’s revival of a contractualist approach to liberal legitimacy a fruitful move for liberalism and/or the social contract tradition? The last section contains a largely negative answer to that question. Nonetheless the chapter's conclusion shows that the research programme of political liberalism provided and continues to provide illuminating insights into the limitations of liberal contractualism, especially under conditions of persistent and radical diversity. The programme is, however, less receptive to challenges to do with the relative decline of the power of modern states

    Constitutivism

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    A brief explanation and overview of constitutivism

    Philosophy of action

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    The philosophical study of human action begins with Plato and Aristotle. Their influence in late antiquity and the Middle Ages yielded sophisticated theories of action and motivation, notably in the works of Augustine and Aquinas.1 But the ideas that were dominant in 1945 have their roots in the early modern period, when advances in physics and mathematics reshaped philosophy

    Constraints on the cosmic expansion history from GWTC-3

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    We use 47 gravitational-wave sources from the Third LIGO-Virgo-KAGRA Gravitational-Wave Transient Catalog (GWTC-3) to estimate the Hubble parameter H(z)H(z), including its current value, the Hubble constant H0H_0. Each gravitational-wave (GW) signal provides the luminosity distance to the source and we estimate the corresponding redshift using two methods: the redshifted masses and a galaxy catalog. Using the binary black hole (BBH) redshifted masses, we simultaneously infer the source mass distribution and H(z)H(z). The source mass distribution displays a peak around 34M34\, {\rm M_\odot}, followed by a drop-off. Assuming this mass scale does not evolve with redshift results in a H(z)H(z) measurement, yielding H0=687+12kms1Mpc1H_0=68^{+12}_{-7} {\rm km\,s^{-1}\,Mpc^{-1}} (68%68\% credible interval) when combined with the H0H_0 measurement from GW170817 and its electromagnetic counterpart. This represents an improvement of 17% with respect to the H0H_0 estimate from GWTC-1. The second method associates each GW event with its probable host galaxy in the catalog GLADE+, statistically marginalizing over the redshifts of each event's potential hosts. Assuming a fixed BBH population, we estimate a value of H0=686+8kms1Mpc1H_0=68^{+8}_{-6} {\rm km\,s^{-1}\,Mpc^{-1}} with the galaxy catalog method, an improvement of 42% with respect to our GWTC-1 result and 20% with respect to recent H0H_0 studies using GWTC-2 events. However, we show that this result is strongly impacted by assumptions about the BBH source mass distribution; the only event which is not strongly impacted by such assumptions (and is thus informative about H0H_0) is the well-localized event GW190814

    Search for continuous gravitational wave emission from the Milky Way center in O3 LIGO--Virgo data

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    We present a directed search for continuous gravitational wave (CW) signals emitted by spinning neutron stars located in the inner parsecs of the Galactic Center (GC). Compelling evidence for the presence of a numerous population of neutron stars has been reported in the literature, turning this region into a very interesting place to look for CWs. In this search, data from the full O3 LIGO--Virgo run in the detector frequency band [10,2000] Hz[10,2000]\rm~Hz have been used. No significant detection was found and 95%\% confidence level upper limits on the signal strain amplitude were computed, over the full search band, with the deepest limit of about 7.6×10267.6\times 10^{-26} at 142 Hz\simeq 142\rm~Hz. These results are significantly more constraining than those reported in previous searches. We use these limits to put constraints on the fiducial neutron star ellipticity and r-mode amplitude. These limits can be also translated into constraints in the black hole mass -- boson mass plane for a hypothetical population of boson clouds around spinning black holes located in the GC.Comment: 25 pages, 5 figure
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