Design of multidimensional compact constellations with high power efficiency

Dissertação apresentada para obtenção do Grau de Mestre em Engenharia Electrotécnica e de Computadores, pela Universidade Nova de Lisboa, Faculdade de Ciências e Tecnologia

O sistema de actos legislativos na 4ª revisão da Constituição Portuguesa: um “aprofundamento multidimensional” do princípio democrático

In, Revista de informação legislativa, v. 38, n. 149, jan./mar. 2001

Common variable immunodeficiency and isosporiasis: first report case

We report a severe case of diarrhea in a 62-year-old female HIV-negative patient from whom Giardia lamblia and Isospora belli were isolated. Because unusual and opportunistic infections should be considered as criteria for further analysis of immunological status, laboratory investigations led to a diagnosis of common variable immunodeficiency (CVID). This is the first reported case of isosporiasis in a patient with CVID and illustrates the importance of being aware of a possible link, particularly in relation to primary immunodeficiency.

The Multidimensional and Centred Structure of Our Interested Perception in Hierocles

O objectivo desta dissertação é identificar a estrutura da percepção tal como ela é desenhada por Hiérocles nos <,(#= >1!(?$%&'(). Para alcançar este objectivo focar-me-ei na análise que o filósofo estóico leva a cabo em torno da percepção. O foco começa por incindir sobre a distinção entre percepção de si e percepção do exterior, com todas as suas subtilezas. Tal análise implicará então a consideração da importância da não-indiferença nessa estrutura de percepção. O objectivo é compreender como a percepção é sempre relacional e interessada. . Centrar-me-ei então na noção de !"#$%&'(), tentanto explorar a complexidade e multiplicidade do fenómeno em causa. Será também estabalecida a relação com o fragmento de Estobeu (6.671), que é, a par da obra, a fonte mais importante do pensamento de Hiérocles. Através desta relação introduzir-se-á a estrutura circular e concêntrica de uma percepção relacional e interessada. Toda esta dissertação será levada a cabo focando-se principalmente nos textos do próprio Hiérocles.

Analysis of world economic variables using multidimensional scaling

Waves of globalization reflect the historical technical progress and modern economic growth. The dynamics of this process are here approached using the multidimensional scaling (MDS) methodology to analyze the evolution of GDP per capita, international trade openness, life expectancy, and education tertiary enrollment in 14 countries. MDS provides the appropriate theoretical concepts and the exact mathematical tools to describe the joint evolution of these indicators of economic growth, globalization, welfare and human development of the world economy from 1977 up to 2012. The polarization dance of countries enlightens the convergence paths, potential warfare and present-day rivalries in the global geopolitical scene.

Comparison of different numerical methods for the solution of the time-fractional reaction-diffusion equation with variable diffusion coefficient

In this work we perform a comparison of two different numerical schemes for the solution of the time-fractional diffusion equation with variable diffusion coefficient and a nonlinear source term. The two methods are the implicit numerical scheme presented in [M.L. Morgado, M. Rebelo, Numerical approximation of distributed order reaction- diffusion equations, Journal of Computational and Applied Mathematics 275 (2015) 216-227] that is adapted to our type of equation, and a colocation method where Chebyshev polynomials are used to reduce the fractional differential equation to a system of ordinary differential equations

Solving large 0–1 multidimensional knapsack problems by a new simplified binary artificial fish swarm algorithm

The artificial fish swarm algorithm has recently been emerged in continuous global optimization. It uses points of a population in space to identify the position of fish in the school. Many real-world optimization problems are described by 0-1 multidimensional knapsack problems that are NP-hard. In the last decades several exact as well as heuristic methods have been proposed for solving these problems. In this paper, a new simpli ed binary version of the artificial fish swarm algorithm is presented, where a point/ fish is represented by a binary string of 0/1 bits. Trial points are created by using crossover and mutation in the different fi sh behavior that are randomly selected by using two user de ned probability values. In order to make the points feasible the presented algorithm uses a random heuristic drop item procedure followed by an add item procedure aiming to increase the profit throughout the adding of more items in the knapsack. A cyclic reinitialization of 50% of the population, and a simple local search that allows the progress of a small percentage of points towards optimality and after that refines the best point in the population greatly improve the quality of the solutions. The presented method is tested on a set of benchmark instances and a comparison with other methods available in literature is shown. The comparison shows that the proposed method can be an alternative method for solving these problems.

Recurrence relations for Clifford algebra-valued orthogonal polynomials

The theory of orthogonal polynomials of one real or complex variable is well established as well as its generalization for the multidimensional case. Hypercomplex function theory (or Clifford analysis) provides an alternative approach to deal with higher dimensions. In this context, we study systems of orthogonal polynomials of a hypercomplex variable with values in a Clifford algebra and prove some of their properties.

“PhenoWorld”: a new multidimensional strategy for studying behaviour in rodents

Tese de Doutoramento em Ciências da Saúde

Sucesso escolar e percursos vocacionais na adolescência: variáveis pessoais e contextuais

Tese de Doutoramento Ciências da Educação (Especialidade em Psicologia da Educação)

Predicting SO2 pollution incidents by means of additive models with optimum variable selection

The aim of this paper is to predict time series of SO2 concentrations emitted by coal-fired power stations in order to estimate in advance emission episodes and analyze the influence of some meteorological variables in the prediction. An emission episode is said to occur when the series of bi-hourly means of SO2 is greater than a specific level. For coal-fired power stations it is essential to predict emission epi- sodes sufficiently in advance so appropriate preventive measures can be taken. We proposed a meth- odology to predict SO2 emission episodes based on using an additive model and an algorithm for variable selection. The methodology was applied to the estimation of SO2 emissions registered in sampling lo- cations near a coal-fired power station located in Northern Spain. The results obtained indicate a good performance of the model considering only two terms of the time series and that the inclusion of the meteorological variables in the model is not significant.

Las Bases Políticas de la Emergencia. Un Estudio Multidimensional de las Relaciones entre el Poder Ejecutivo Nacional y el Poder Legislativo, 2003-2009

La relación del Gobierno de Kirchner con el poder Legislativo implicó un proceso de concentración del poder en manos del Ejecutivo, no obstante lo cual, a poco de iniciado el mandato de Cristina Fernández, la relación con el Congreso queda en el medio de una crisis que llegó a poner en duda la propia continuidad de la presidenta. Este proyecto pretende examinar las características de este proceso delegativo en sus diferentes dimensiones, con el fin de entender el origen de esta crisis y especificar sus alcances. En este marco, la dinámica de la relación entre el Congreso y el Ejecutivo pareciera corresponder a lo que especifica la Teoría del Cártel tal como ha sido reformulada por Jones y Hwang. Esta perspectiva, no obstante, se centra exclusivamente en los aspectos distributivos de la relación entre el Ejecutivo y el Legislativo, obviando la dimensión electoral y la ideológicodiscursiva. Dadas las características del Gobierno de Kirchner, en este proyecto abordaremos el estudio de aquella relación desde una perspectiva multidimensional, tomando en cuenta no sólo los aspectos distributivos, sino también los electorales y los discursivos. La pregunta que guía nuestro trabajo es por qué las estrategias de acumulación desplegadas simultáneamente en las tres dimensiones, no lograron (o sólo lo hicieron parcialmente) desactivar el carácter condicional de la delegación de los jefes políticos provinciales al liderzgo presidencial. Nuestra hipótesis general es que, aún cuando el Gobierno consiguió reforzar sustancialmente su posición en la dimensión distributiva a partir de la prolongación de la situación de emergencia, tuvo un éxito parcial en las dimensiones electoral e ideológico-discursiva. Sin compromiso ideológico articulado en un discurso común, y sin una conexión electoral que vincule los intereses electorales a nivel provincial con los del nivel nacional, la estrategia distributiva sólo puede contener parcialmente la defección de buena parte del oficialismo en el Congreso frente a una crisis de grandes proporciones.

Multidimensional schemes for hyperbolic conservation laws on triangular meshes

Genuinely multidimensional schemes, hyperbolic systems, wave equations, Euler equations, evolution Galerkin schemes, space-time conservative methods, high order accuracy, shock solutions

Variable Ventilsteuerung für Pkw-Dieselmotoren mit Direkteinspritzung

Dieselmotor, Brennverfahren, Ventilsteuerung, Ladungswechsel

Variable dentition in a Chinese insectivore, by Wilfred H. Osgood.

v.20:no.27(1937)