120,050 research outputs found

    Dois poemas vitorianos

    Get PDF
    Tradução de: Ebal Martins Diniz Junio

    Selected Approaches to Urban Watershed Response Modeling

    Get PDF
    Paper by Elvidio V. Diniz and Diego Suare

    The description of gravitational waves in geometric scalar gravity

    Full text link
    It is investigated the gravitational waves phenomena in the geometric scalar theory of gravity (GSG), a class of theories such that gravity is described by a single scalar field. The associated physical metric describing the spacetime is constructed from a disformal transformation of Minkowski geometry. In this theory, a weak field approximation gives rise to a description similar to that one obtained in general relativity, with the gravitational waves propagating at the same speed as the light, although they have a characteristic longitudinal polarization mode, besides others modes that are observer dependent. We also analyze the energy carried by the gravitational waves as well as how their emission affects the orbital period of a binary system. Observational data coming from Hulse and Taylor binary pulsar is then used to constraint the theory parameter.Comment: Revised version accepted for publication in EPJC; confrontation with pulsar observational data added; abstract slightly changed. arXiv admin note: substantial text overlap with arXiv:1607.0103

    PRODUCTIVE SPECIALIZATION AND REGIONAL DEVELOPMENT IN PORTUGAL AT THE NUTS III LEVEL

    Get PDF
    The purpose of this paper is to analyse how the specialization of Portuguese productive structures has evolved between 1995 and 2004, using specialization indicators, namely localization quotient estimation, to assess both the relative degree of concentration of a given activity in a certain area and the specialization coefficient, that helps characterize a region’s economy according to its degree of specialization. The Theil Index, together with the diversification/specialization degree of each region was also taken into consideration in this analysis. Reference variables for specialization analysis purposes were Gross Value Added and Employment in an attempt to compare differences observed with productivities, which, in turn, are related to purchasing power evolution within each territorial unit. The main aim of this study was, then, a thorough research into the time-spatial relationship between specialization, productivity and development.Productive specialisation index and regional development, multiple regression, Theil Index

    Trends. Psychology and SIN in Brazil: What Will the Future Bring?

    Get PDF
    This article announces the upcoming confirmation of Marisa Almeida del\u27Isola e Diniz as the head of the Brazilian Intelligence Agency and questions how her background in psychology may affect the country

    CONTRUCTING A BROADER MEASURE OF WELFARE INCORPORATING THE ACCESS TO PUBLIC GOODS

    Get PDF
    This paper attempts to construct a broader measure of welfare that takes in account the access people have to some public goods. If the data on household access to public goods and private assets is assumed to be the result of a maximization problem, a latent indirect utility level may be estimated by some factor model. In this paper the individual measure of welfare is constructed using Principal Component Analysis (PCA) in the ownership of private assets and the existence of public goods in the neighborhood the agent lives in. The resulting welfare distributions are used in different analysis: Calculate the treatment effect of having access to certain public goods; investigate the effects of public goods in poverty and inequality alleviation; development of an algorithm to locate public goods in order to maximize some social welfare function.
    corecore