753 research outputs found

    Inter-market Arbitrage in Sports Betting

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    Unlike the existing literature on sports betting, which concentrates on arbitrage within a single market, this paper examines inter-market arbitrage by searching for arbitrage opportunities through combining bets at the bookmaker and the exchange market. Using the posted odds of eight different bookmakers and the corresponding odds traded at a well-known bet exchange for 5,478 football matches played in the top-five European leagues during three seasons, we find (only) ten intra-market arbitrage opportunities. However, we find 1,450 cases in which a combined bet at the bookmaker as well as at the exchange yields a guaranteed positive return. Further analyses reveal that inter-market arbitrage emerges from different levels of informational efficiency between the two markets.sports betting, inter-market arbitrage

    Selection of a seventh spectral band for the LANDSAT-D thematic mapper

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    The author has identified the following significant results. Each of the candidate bands were examined in terms of the feasibility of gathering high quality imagery from space while taking into account solar illumination, atmospheric attenuation, and the signal/noise ratio achievable within the TM sensor constraints. For the 2.2 micron region and the thermal IR region, inband signal values were calculated from representative spectral reflectance/emittance curves and a linear discriminant analysis was employed to predict classification accuracies. Based upon the substantial improvement (from 78 t0 92%) in discriminating zones of hydrothermally altered rocks from unaltered zones, over a broad range of observation conditions, a 2.08-2.35 micron spectral band having a ground resolution of 30 meters was recommended

    Optimum thermal infrared bands for mapping general rock type and temperature from space

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    A study was carried out to determine quantitatively the number and locations of spectral bands required to perform general rock-type discrimination from spaceborne imaging sensors using only thermal infrared measurements. Beginning with laboratory spectra collected under idealized conditions from relatively well characterized, homogeneous samples, a radiative transfer model was employed to transform ground exitance values into the corresponding spectral radiance at the top of the atmosphere. Taking sensor noise into account analysis of these data revealed that three 1 micrometer wide spectral bands would permit independent estimators of rock-type and sample temperature from a satellite infrared multispectral scanner. This study, indicates that the location of three spectral bands at 8.1-9.1 micrometers, 9.5-10.5 micrometers and 11.0-12.0 micrometers, and the employment of appropriate preprocessing to minimize atmospheric effects makes it possible to predict general rock-type and temperature for a variety of atmospheric states and temperatures

    Spin dependent transport in organic light-emitting diodes

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    Electrically Detected Magnetic Resonance (EDMR) was used to study a series of multilayer organic devices based on aluminum (III) 8-hydroxyquinoline. These devices were designed to identify the micoscopic origin of different spin dependent process, i.e. hopping and exciton formation. EDMR is demonstrated to probe molecular orbitals of charge, and thus indirectly explore interfaces, exciton formation, charge accumalation and electric fields in operating organic based devices

    Development, implementation and evaluation of satellite-aided agricultural monitoring systems

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    Research activities in support of AgRISTARS Inventory Technology Development Project in the use of aerospace remote sensing for agricultural inventory described include: (1) corn and soybean crop spectral temporal signature characterization; (2) efficient area estimation techniques development; and (3) advanced satellite and sensor system definition. Studies include a statistical evaluation of the impact of cultural and environmental factors on crop spectral profiles, the development and evaluation of an automatic crop area estimation procedure, and the joint use of SEASAT-SAR and LANDSAT MSS for crop inventory

    Analysis and Control of Multimode Combustion Switching Sequence.

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    Highly dilute, low temperature combustion technologies, such as homogeneous charge compression ignition (HCCI), show significant improvements in internal combustion engine fuel efficiency and engine-out NOx emissions. These improvements, however, occur at limited operating range and conventional spark ignition (SI) combustion is still required to fulfill the driver's high torque demands. In consequence, such multimode engines involve discrete switches between the two distinct combustion modes. Such switches unfortunately require a finite amount of time, during which they exhibit penalties in efficiency. Along with its challenges, the design of such a novel system offers new degrees of freedom in terms of engine and aftertreatment specifications. Prior assessments of this technology were based on optimistic assumptions and neglected switching dynamics. Furthermore, emissions and driveability were not fully addressed. To this end, a comprehensive simulation framework, which accounts for above-mentioned penalties and incorporates interactions between multimode engine, driveline, and three-way catalyst (TWC), has been developed. Experimental data was used to parameterize a novel mode switch model, formulated as finite-state machine. This model was combined with supervisory controller designs, which made the switching decision. The associated drive cycle results were analyzed and it was seen that mode switches have significant influence on overall fuel economy, and the issue of drivability needs to be addressed within the supervisory strategy. After expanding the analysis to address emissions assuming a TWC, it was shown that, in practice, HCCI operation requires the depletion of the TWC's oxygen storage capacity (OSC). For large OSCs the resulting lean-rich cycling nullifies HCCI's original efficiency benefits. In addition, future emissions standards are still unlikely to be fulfilled, deeming a system consisting of such a multimode engine and TWC with generous OSC unfavorable. In view of these difficulties, the modeling framework was extended to a mild hybrid electric vehicle (HEV) allowing a prolonged operation in HCCI mode with associated fuel economy benefits during city driving. Further analysis on how to reduce NOx while maintaining fuel economy resulted in a counterintuitive suggestion. It was deemed beneficial to constrain the HCCI operation to a small region, exhibiting lowest NOx, while reducing instead of increasing the OSC.PhDMechanical EngineeringUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/116660/1/snuesch_1.pd

    Effects of angiotensin converting enzyme inhibition on endothelial vasodilator function in primary human hypertension

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    Hypertension in animal models and in humans is associated with a decreased vasodilator response to acetylcholine which causes vascular relaxation by release of endothelium-derived relaxing factor from the endothelium. Since lowering of blood pressure, particularly with angiotensin converting enzyme inhibitors, improved the response to acetylcholine we investigated the effects of brachial artery infusions of ascending dosages of actetylcholine on forearm blood flow before and after 5 months of therapy with the angiotensin converting enzyme inhibitor, cilazapril, in 10 patients with mild to moderate primary hypertension. Cilazapril decreased blood pressure from 150.8 ± 14.4/98.9 ± 4.3 mmHg during placebo to 138.8 ± 15.6/88.6 ± 8.9 mmHg (P < 0.01). Brachial artery acetylcholine infusions increased forearm blood flow from 2.95 ± 1.5 to a maximum of 22.8 ± 11.5 ml.min−1.100 ml−1 forearm tissue and decreased forearm vascular resistance from 48.1 ± 34.1 to 6.9 ± 6.9 units before cilazapril. This response did not change after cilazapril therapy. Our findings in patients with primary hypertension, therefore, do not support the concept that angiotensin converting enzyme inhibition influences endothelium-dependent vascular relaxation to acetylcholine to a significant degree. Whether this lack of effect on endothelial vasodilator function is specific for the vascular bed chosen for study or whether it represents a fundamental difference between animal models and human hypertension remains an important issue to be clarifie

    “Dear Esther”: repetição, rito e tempo

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    O artigo apresenta uma interpretação da narrativa digital Dear Esther (PINCHBECK, 2012). Essa interpretação propõe que há uma temporalidade profunda, que se pode trazer à evidência entendendo a trama como um rito suicida realizado pelo personagem principal (e único da obra). Para trazer essa temporalidade ao aberto, foram examinados: os índices de manifestação do tempo em diversos momentos da narrativa; as formas de interação do usuário com a obra; e as características do mundo ficcional construído pela programação da obra. Esses elementos formais foram confrontados com elementos significativos que se apresentam ao longo do desenvolvimento da narrativa, como informações dadas pela voz narrativa, objetos, sons e alterações visuais. O procedimento para realizar esse exame e confronto teve duas formas: explorações da obra considerando o tempo cronométrico para ir do começo ao fim o mais brevemente possível; explorações livres sem considerar o tempo cronométrico. As conclusões a que se chegou após esse processo de exame como um todo foram interpretadas através do conceito de “Spiel” (GADAMER, 2003, p. 154-237) e das reflexões acerca da experiência do tempo implícitas nele

    O correlato anímico da mimese poética nos escritos sobre a alma e a imaginação de Aristóteles

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    Este texto trata de demonstrar que o conceito de mimese presente na Poética de Aristóteles pode ser esclarecido pela relação com outros tratados do autor, nos quais se explora a imaginação enquanto potência da alma. Para isso, destacamos passagens importantes da poética, a partir das quais se tecem as relações com os demais textos.&nbsp;Conclui-se que uma investigação mais aprofundada sobre a imaginação pode trazer luz ao conceito de mimese da Poética, que não recebe definição naquele tratado

    Ler Onetti com Nietzsche

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    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão. Programa de Pós-Graduação em Literatura.Neste trabalho lemos as narrativas ficcionais do escritor uruguaio Juan Carlos Onetti a partir de certos aspectos da filosofia de Friedrich Nietzsche e da leitura que dela faz o filósofo francês Gilles Deleuze. Para isso, na primeira parte deste trabalho, levamos a cabo um estudo de alguns textos de Nietzsche delimitando a noção de "caráter relacional da efetividade", que é retomada na segunda parte deste trabalho. Fazemos a leitura de Nietzsche orientando-nos, quanto aos seus conceitos principais, pela interpretação de Deleuze. Na segunda parte deste trabalho exploramos algumas características da ficção narrativa onettiana a partir do estudado com Nietzsche/Deleuze, tratando de apontar para a sua pertinência na abordagem dos problemas colocados pelos textos de Onetti. Assim, relacionamos a idéia colocada pela narrativa onettiana segundo a qual a realidade seria um texto, com a noção de "caráter relacional da efetividade". Desta forma, levamos a cabo reflexões acerca do entrelaçamento dos personagens e seus corpos com a efetividade textual que constitui a sua realidade, apontando os problemas que este entrelaçamento suscita para a leitura do corpus narrativo onettiano e o universo ficcional por ele instaurado. In this work we read the fictional narratives of the Uruguayan writer Juan Carlos Onetti from the perspective of certain aspects of Friedrich Nietzsche's philosophy and from the readings that the French philosopher Gilles Deleuze does of it. To accomplish this, in the first part of this work, we make a study of Nietzsche's texts delimiting the notion of "effectiveness relational characteristic", which is taken up again in the second part of this work. We read Nietzsche orienting ourselves, in terms of his main concepts, by Deleuze's interpretation. In the second part of this work we explore some characteristics of onettian fictional narrative based on what was studied of Nietzsche/Deleuze, attempting to point out their pertinence in the approach of handling the problems placed by Onetti's texts. Thus, we relate the idea brought forth by the onettian narrative, by which reality would be a text, with the notion of "effectiveness relational characteristic". This way, we reflect upon the interlacement of the characters and their bodies with the textual effectiveness that constitutes their reality, pointing out the problems that this interlacement gives rise to in the reading of the onettian narrative corpus and the fictional universe established by it
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