1,721,468 research outputs found
Lesiones más frecuentes en el triatlón, factores de riesgo y medidas de prevención
No full textEn la actualidad el triatlón es un deporte individual y de resistencia que reúne tres disciplinas deportivas: natación, ciclismo y carrera a pie. Existen numerosos factores de riesgo que inciden en la aparición de lesiones en este deporte. Siendo importante determinar las mejores medidas preventivas para evitarlas.
Objetivo: Identificar las lesiones deportivas más frecuentes en la práctica del triatlón, factores que contribuyen a la aparición de las mismas y medidas preventivas utilizadas en los entrenamientos de los triatletas de entre 18 y 55 años de edad de la ciudad de Mar del Plata.Fil: Rodríguez Rucci, Tomás. Universidad FASTA. Facultad de Ciencias Médicas Argentina.Fil: Fernandez, Pablo. Universidad FASTA. Facultad de Ciencias Médicas; Argentina
Splitting up dark matter
Full text linkFil: Fernandez, Pablo. Universidad de San Andrés. Departamento de Economía; Argentina.This paper offers a detailed analysis of an alternative measure of income flows from officials’ accounts denominated
“dark matter.” We aim to extend this area of investigation by splitting dark matter into two main components
denominated “equity” and “portfolio.” In this way, we can shed some light on the underlying fundamentals of income
flows’ evolution for different countries. Once we obtain these components, we proceed to contrast these new
measures against the actual data. Our main results are that this new perspective supports previous work, helps
explain the income flows for countries from another point of view, and we offer a first approach for the determinants
of the differences in income flows across countries.Keywords: Dark Matter, Global Imbalances, Foreign Direct Investment, Flows of income
Atmospheric Neutrino Monte Carlo Simulations
No full textWe provide the MC simlation files of atmospheric neutrinos for the following experiments in HDF5 (https://www.hdfgroup.org/solutions/hdf5/) format
High-Fidelity Shape Optimization of Non-Conventional Turbomachinery by Surrogate Evolutionary Strategies
No full textThis paper presents a novel tool for the shape optimization of turbomachinery blade profiles operating with fluids in non-ideal thermodynamic conditions and in complex flow configurations. In novel energy conversion systems, such as organic Rankine cycles or supercritical CO2 cycles, the non-conventional turbomachinery layout as well as the complex thermodynamics of the working fluid complicate significantly the blade aerodynamic design. For such applications, the design of turbomachinery may considerably benefit from the use of systematic optimization methods, especially in combination with high-fidelity computational fluid dynamics (CFD), as it is shown in this paper. The proposed technique is implemented in the shape-optimization package FORMA (Fluid-dynamic OptimizeR for turbo-Machinery Aerofoils) developed in-house at the Politecnico di Milano. FORMA is constructed as a combination of a generalized geometrical parametrization technique based on B-splines, a CFD solver featuring turbulence models and arbitrary equations of state, and multiple surrogate-based evolutionary strategies based on either trust-region or training methods. The application to the re-design of a supersonic turbine nozzle shows the capabilities of applying a high-fidelity optimization, consisting of a 50% reduction in the cascade loss coefficient and in an increased flow uniformity at the inlet of the subsequent rotor. Two alternative surrogate-based evolutionary strategies and different fitness functions are tested and discussed, including nonlinear constraints within the design process. The optimization study reveals relevant insights into the design of supersonic turbine nozzles as well on the performance, reliability, and potential of the proposed design technique
Going Forward with Lymphocytes Immunotherapies for Treatment of Unexplained Recurrent Spontaneous Abortion
Full text linkRecurrent spontaneous abortion (RSA), defined as the occurrence of two or more consecutive miscarriages at less than 22-weeks of gestation [1], is one of the major pregnancy disorders and affects up to 5% of couples of reproductive ages. Although genetic factors, hormonal diseases, anatomical anomalies and antiphospholipid syndrome have been linked with RSA [2,3], 50% of cases still remain unexplained and generate growing interest to unveil potential involved mechanism, particularly for those that imply immunological pathwaysFil: Arana, Eloisa. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Inmunología, Genética y Metabolismo. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Inmunología, Genética y Metabolismo; ArgentinaFil: Fernandez, Pablo Mariano. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Inmunología, Genética y Metabolismo. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Inmunología, Genética y Metabolismo; Argentin
Cash flow is cash and is a fact. Net income is just an opinion
Full text linkA company's profit after tax (or net income) is quite an arbitrary figure, obtained after assuming certain accounting hypotheses regarding expenses and revenues. On the other hand, its cash flow is an objective measure, a single figure that is not subject to any personal criterion. In general, to study a company's situation, it is more useful to operate with the cash flow (equity cash flow, free cash flow or capital cash flow) as it is a single figure, while the net income is one of several that can be obtained, depending on the criteria applied. Profit after tax (PAT) is equal to the equity cash flow when the company is not growing, buys fixed assets for an amount identical to depreciation, keeps debt constant, and only writes off or sells fully depreciated assets. Profit after tax (PAT) is also equal to the equity cash flow when the company collects in cash, pays in cash, holds no stock (this company's working capital requirements are zero), and buys fixed assets for an amount identical to depreciation. When making projections, the dividends and other forecast payments to shareholders must be exactly equal to expected equity cash flows.Cash flow; Net income; Equity cash flow; Free cash flow; Capital cash flow;
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
The equity premium in 100 textbooks
Full text linkI review 100 finance and valuation textbooks published between 1979 and 2008 by authors such as Brealey and Myers, Copeland, Damodaran, Merton, Ross, Bruner, Bodie, Penman, Weston, Brigham and Arzac and find that their recommendations regarding the equity premium range from 3% to 10%. I also find that several books use different equity premia on different pages. Some of the confusion arises from not distinguishing among the four concepts that the term equity premium designates: historical equity premium, expected equity premium, required equity premium and implied equity premium. Finance textbooks should clarify the equity premium by providing distinguishing definitions of these four concepts and conveying a clearer message about their sensible magnitudes.equity premium; equity premium puzzle; required market risk premium; historical market risk premium; expected market risk premium; risk premium; market risk premium; market premium;
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
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