90 resultados para regression dicontinuity design
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Impact Assessment and Project Appraisal, vol. 22, n.1, March 2004, p. 47–62
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Dissertação de Mestrado em Ciências da Comunicação Cultura Contemporânea e Novas Tecnologias
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Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção do Grau de Mestre em Engenharia Electrotécnica e de Computadores
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Thesis submitted in Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa for the degree of Master in Materials Engineering
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Trabalho de Projecto de Mestrado em Ciências da Comunicação Variante Novos Media e Práticas Web
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Sustainable Construction, Materials and Practice, p. 426-432
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Dissertação apresentada para a obtenção do Grau de Doutor em Informática
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Dissertation presented to obtain the Ph.D degree in Bioinformatics
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Dissertation presented to obtain the Doutoramento (Ph.D.) degree in Biochemistry at the Instituto de Tecnologia Qu mica e Biol ogica da Universidade Nova de Lisboa
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An individual experiences double coverage when he bene ts from more than one health insurance plan at the same time. This paper examines the impact of such supplementary insurance on the demand for health care services. Its novelty is that within the context of count data modelling and without imposing restrictive parametric assumptions, the analysis is carried out for di¤erent points of the conditional distribution, not only for its mean location. Results indicate that moral hazard is present across the whole outcome distribution for both public and private second layers of health insurance coverage but with greater magnitude in the latter group. By looking at di¤erent points we unveil that stronger double coverage e¤ects are smaller for high levels of usage. We use data for Portugal, taking advantage of particular features of the public and private protection schemes on top of the statutory National Health Service. By exploring the last Portuguese Health Survey, we were able to evaluate their impacts on the consumption of doctor visi
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Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção do grau de Mestre em Engenharia Electrotécnica e de Computadores
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FCT/UNL; UNIDEMI, Caixa Geral de Depósitos, CEST, MANO, Visteon, Axiomatic Design, Pionee
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The aim of this contribution is to extend the techniques of composite materials design to non-linear material behaviour and apply it for design of new materials for passive vibration control. As a first step a computational tool allowing determination of macroscopic optimized one-dimensional isolator behaviour was developed. Voigt, Maxwell, standard and more complex material models can be implemented. Objective function considers minimization of the initial reaction and/or displacement peak as well as minimization of the steady-state amplitude of reaction and/or displacement. The complex stiffness approach is used to formulate the governing equations in an efficient way. Material stiffness parameters are assumed as non-linear functions of the displacement. The numerical solution is performed in the complex space. The steady-state solution in the complex space is obtained by an iterative process based on the shooting method which imposes the conditions of periodicity with respect to the known value of the period. Extension of the shooting method to the complex space is presented and verified. Non-linear behaviour of material parameters is then optimized by generic probabilistic meta-algorithm, simulated annealing. Dependence of the global optimum on several combinations of leading parameters of the simulated annealing procedure, like neighbourhood definition and annealing schedule, is also studied and analyzed. Procedure is programmed in MATLAB environment.
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Relatório de Estágio apresentado para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Novos Media e Práticas Web
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Este working paper centra-se no desenvolvimento das técnicas de edição de documentos ou publicações, que têm conhecido um incremento espectacular na última década. Os avanços e descobertas mais significativas entre 1450 e 1986, eclipsam-se praticamente, quando comparados com as grandes modificações dos últimos sete anos (isto é a História da auto-edição e si). Desde o aparecimento do primeiro programa de auto-edição e da primeira impressora laser, dotada de um intérprete postscript, até hoje, a evolução e aperfeiçoamento tanto do software como do hardware tem sido tanta, continuando a fazer-se a um tal ritmo, que se tornou irreversível.