Submitted by Johnny Rodrigues (johnnyrodrigues@ufcg.edu.br) on 2018-07-06T14:21:44Z No. of bitstreams: 1 MOISÉS DANTAS DOS SANTOS - DISSERTAÇÃO PPGMAT 2005..pdf: 524230 bytes, checksum: a8d6e23eaf6da89e369eb29e888e7a1a (MD5) / Made available in DSpace on 2018-07-06T14:21:44Z (GMT). No. of bitstreams: 1 MOISÉS DANTAS DOS SANTOS - DISSERTAÇÃO PPGMAT 2005..pdf: 524230 bytes, checksum: a8d6e23eaf6da89e369eb29e888e7a1a (MD5) Previous issue date: 2005-12 / Neste trabalho usaremos métodos variacionais para mostrar a existência de solução fraca para dois tipos de problema. O primeiro consiste num problema não-linear, O segundo, trata-se de uma Equação Diferencial Ordinária / In this work we use variational methods to show the existence of weak solutions for two types problems. The first of them is a nonlinear problem, The second, is related with a following Ordinary Differential Equations.

Ce mémoire présente une approche basée sur des méthodes garanties pour résoudre des problèmes d’optimisation de systèmes dynamiques multi-physiques. Ces systèmes trouvent des applications directes dans des domaines variés tels que la conception en ingéniérie, la modélisation de réactions chimiques, la simulation de systèmes biologiques ou la prédiction de la performance sportive.La résolution de ces problèmes d’optimisation s’effectue en deux phases. La première consiste à mettre le problème en équations sous forme d’un modèle mathématique constitué d’un ensemble de variables, d’un ensemble de contraintes algébriques et fonctionelles ainsi que de fonctions de coût. Celles-ci sont utilisées lors de la seconde phase qui consiste à d’extraire du modèle les solutions optimales selon plusieurs critères (volume, poids, etc).Les contraintes algébriques permettent de manipuler des grandeurs statiques (quantité, taille, densité, etc). Elles sont non linéaires, non convexes et parfois discontinues.Les contraintes fonctionnelles permettent de manipuler des grandeurs dynamiques. Ces contraintes peuvent être relativement simples comme la monotonie ou la périodicité, mais aussi bien plus complexe par la prise en compte de contraintes différentielles simples ou définies par morceaux. Les équations différentielles sont utilisées pour modéliser des comportements physico-chimiques (magnétiques, thermiques, etc) et d’autres caractéristiques qui varient lors de l’évolution du système.Il existe plusieurs niveaux d’approximation pour chacune de ces deux phases. Ces approximations donnent des résultats pertinents, mais elles ne permettent pas de garantir l’optimalité ni la réalisabilité des solutions.Après avoir présenté un ensemble de méthodes garanties permettant de résoudre de manière garantie des équations différentielles ordinaires, nous formalisons un modèle particulier de systèmes hybrides sous la forme d’équations différentielles ordinaires par morceaux. A l’aide de plusieurs preuves et théorèmes nous étendons la première méthode de résolution pour résoudre de manière garantie ces équations différentielles par morceaux. Dans un second temps, nous intégrons ces deux méthodes au sein d’un module de programmation par contracteurs, que nous avons implémenté. Ce module basé sur des méthodes garantie permet de résoudre des problèmes de satisfaction de contraintes algébriques et fonctionnelles. Ce module est finalement utilisé dans un algorithme d’optimisation globale déterministe modulaire permettant de résoudre les problèmes considérés. / In this thesis a set of tools based on guaranteed methods are presented in order to solve multi-physics dynamic problems. These systems can be applied in various domains such that engineering design process, model of chemical reactions, simulation of biological systems or even to predict athletic performances.The resolution of these optimization problems is made of two stages. The first one consists in defining a mathematical model by setting up the equations for the problem. The model is made of a set of variables, a set of algebraic and functional constraints and cost functions. The latter are used in the second stage in order to extract the optimal solutions from the model depending on several criteria (volume, weight, etc).Algebraic constraints are used to describe the static properties of the system (quantity, size, density, etc). They are non-linear, non-convex and sometimes discontinuous. Functional constraints are used to manipulate dynamic quantities. These constraints can be quite simple such as monotony or periodicity or they can be more complex such as simple or piecewise differential constraints. Differential equations are used to describe physico-chemical properties (magnetic, thermal, etc) and other features evolving with the component use. Several levels of approximation exist for each of these two stages. These approximations give some relevant results but they do not guarantee the feasibility nor the optimality of the solutions.After presenting a set of guaranteed methods in order to perform the guaranteed integration of ordinary differential equations, a peculiar type of hybrid system that can be modeled with piecewise ordinary differential equation is considered. A new method that computes guaranteed integration of these piecewise ordinary differential equations is developed through an extension of the initial algorithm based on several proofs and theorems. In a second step these algorithms are gathered within a contractor programming module that have been implemented. It is used to solve algebraic and functional constraint satisfaction problems with guaranteed methods. Finally, the considered optimization problems are solved with a modular deterministic global optimization algorithm that uses the previous modules.

This thesis deals with the modelling of applying techniques of ordinary least squares method and geographically weighted regression for all administrative divisions of the Czech Republic using ArcGIS software. In general this thesis introduces a GWR method which partially solves the problems associated with the analysis of spatial data. The research compares benefits of using geographically weighted regression with spatial data compared with linear regression in thesis conclusion.

Submitted by Levi Santos (levis@ufba.br) on 2018-01-30T21:19:42Z No. of bitstreams: 1 Tese Levi PPGCI-UFBA 05.12.2017.pdf: 3296241 bytes, checksum: c7064236d23f11486d498f569f5185f1 (MD5) / Approved for entry into archive by Urania Araujo (urania@ufba.br) on 2018-02-19T20:06:50Z (GMT) No. of bitstreams: 1 Tese Levi PPGCI-UFBA 05.12.2017.pdf: 3296241 bytes, checksum: c7064236d23f11486d498f569f5185f1 (MD5) / Made available in DSpace on 2018-02-19T20:06:50Z (GMT). No. of bitstreams: 1 Tese Levi PPGCI-UFBA 05.12.2017.pdf: 3296241 bytes, checksum: c7064236d23f11486d498f569f5185f1 (MD5) / Analisa a produção científica brasileira (artigos nacionais, artigos internacionais, anais de eventos e livros) através dos Mínimos Quadrados Ordinários (MQO). Para tanto, discorre sobre o percurso histórico e de aplicação das metrias que a Ciência da Informação (CI) vem construindo, desde a mais primordial de todas, a bibliometria, oriunda da biblioteconomia, passando pelas visões modernas como a cienciometria até a informetria. Explica como a econometria constrói o seu modelo de análise, que é utilizado para pesquisas na economia e, ao mesmo tempo, reflete como esse método pode ser trazido para as metrias da informação. Explica e expõe o método de estimação por MQO para a análise de regressão, que é a proposta desta tese. Pesquisa aplicada descritiva com abordagem quantitativa com procedimentos baseados no tipo de pesquisa estudo de caso do levantamento de dados a partir do Portal do Plano Tabular do CNPq do ano de 2010. Os critérios para delineamento da pesquisa foram aprofundados, na revisão de literatura, em referências tanto da área da CI quanto da bibliometria, estatística e econometria. Este estudo, metodologicamente, conta com a abordagem conceitual da bibliometria e da CI em busca de teorias aplicáveis aos estudos em MQO e a aplicação empírica do MQO se aproxima da concepção econométrica. A tese conclui que a utilização de técnicas de análises das funções de regressão construída por meio de MQO possibilita a criação de um modelo de previsão da produção científica brasileira. Esse modelo é construído a partir da correlação e determinação detectada entre o número de doutores e a produção científica destes em cada estado do Brasil. Com a aplicação de estratégias econométricas (índice de correlação, índice de determinação, forma funcional de curva de regressão e cálculo dos parâmetros da função por MQO), foi possível construir um modelo de previsão.

Submitted by joao barbosa campbell penna (joao.penna@vale.com) on 2015-02-20T19:44:37Z No. of bitstreams: 1 TESEFINAL_20022015.pdf: 1480842 bytes, checksum: 11e3f73bc5b243b7ed4a73b63fe90c59 (MD5) / Approved for entry into archive by GILSON ROCHA MIRANDA (gilson.miranda@fgv.br) on 2015-06-08T18:42:08Z (GMT) No. of bitstreams: 1 TESEFINAL_20022015.pdf: 1480842 bytes, checksum: 11e3f73bc5b243b7ed4a73b63fe90c59 (MD5) / Approved for entry into archive by Marcia Bacha (marcia.bacha@fgv.br) on 2015-06-12T17:55:33Z (GMT) No. of bitstreams: 1 TESEFINAL_20022015.pdf: 1480842 bytes, checksum: 11e3f73bc5b243b7ed4a73b63fe90c59 (MD5) / Made available in DSpace on 2015-06-12T17:56:53Z (GMT). No. of bitstreams: 1 TESEFINAL_20022015.pdf: 1480842 bytes, checksum: 11e3f73bc5b243b7ed4a73b63fe90c59 (MD5) Previous issue date: 2014-12-20 / Medimos a validade da paridade descoberta de juros – PDJ - para o mercado brasileiro no período de janeiro de 2010 a julho de 2014. Testamos a equação clássica da PDJ usando o Método dos Mínimos Quadrados Ordinários. Após a estimação dos parâmetros, aplicamos o Teste de Wald e verificamos que a paridade descoberta de juros não foi validada. Estendemos a equação tradicional da PDJ para uma especificação alternativa que captura medidas de risco Brasil e de alteração na liquidez internacional. Especificamente, acrescentamos três variáveis de controle: duas variáveis dummy que capturam condições de liquidez externa e o índice de commoditie CRB, que captura o risco Brasil. Com a especificação alternativa, a hipótese de que os retornos das taxas de juros em Real, dolarizadas, são iguais aos retornos da taxas de juros contratadas em dólares, ambas sujeitas ao risco Brasil, não foi rejeitada. Em complemento à análise das taxas representativas do mercado brasileiro, procurou-se avaliar a predominância da PDJ nas operações de swap cambial realizadas pela Vale S.A.. Para tanto, a série de taxa de juros em dólares do mercado brasileiro foi substituída pela taxa em dólar dos swaps contratados pela Vale. Os resultados encontrados demonstram que, quando comparado ao comportamento do mercado, as taxas em dólares da VALE são mais sensíveis às variações das taxas em Reais. / We measure the validity of uncovered interest parity - UIP - for the Brazilian market from January, 2010 to July, 2014. We tested the classical equation of UIP using the ordinary least squares method. After the estimation, we apply the Wald test and we verify that the uncovered interest parity has not been validated. We extend the traditional UIP equation for an alternative specification that captures Brazil risk and changes in liquidity of the international market. Specifically, we add three control variables: two dummy variables that capture external liquidity conditions and the commodity index CRB, which captures Brazil risk. With the alternative specification, the hypothesis that the returns in interest rates in Real, dollarized, are equal to the return of interest rate contracted in dollars, both subject to Brazil risk, was not rejected. To complement the analysis using the interest rates existing in the Brazilian market, we tried to evaluate the prevalence of UIP in cross currency interest rate swaps carried out by Vale SA. The interest rate in dollar of the Brazilian market was replaced by the dollar rate of swaps contracted by Vale. The results show that, when compared to market behavior, the dollar rates of Vale SA. are more sensitive to changes in Reais interest rates.

Submitted by Juliana Shimote (shimote.juliana@gmail.com) on 2015-03-07T22:15:06Z No. of bitstreams: 1 UMA ANÁLISE DO GASTO FAMILIAR COM EDUCAÇÃO NO BRASIL E DA PARTICIPAÇÃO DO CRÉDITO EM SEU FINANCIAMENTO.pdf: 916706 bytes, checksum: 52f881c098819b4dcd22372255dcc654 (MD5) / Rejected by Renata de Souza Nascimento (renata.souza@fgv.br), reason: Juliana, boa tarde Para que possamos aceitar seu trabalho junto à biblioteca, por gentileza, realize as alterações abaixo solicitadas: - Os títulos AGRADECIMENTOS/RESUMO/ABSTRACT devem estar CENTRALIZADO. - O texto dos agradecimentos, deve estar justificado igual ao texto do Resumo. Aguardo as alterações e uma nova submissão. Att Renata on 2015-03-09T17:38:09Z (GMT) / Submitted by Juliana Shimote (shimote.juliana@gmail.com) on 2015-03-09T18:03:07Z No. of bitstreams: 1 UMA ANÁLISE DO GASTO FAMILIAR COM EDUCAÇÃO NO BRASIL E DA PARTICIPAÇÃO DO CRÉDITO EM SEU FINANCIAMENTO.pdf: 915983 bytes, checksum: f5370a8d744e59b71b4483860d8f2d7d (MD5) / Approved for entry into archive by Renata de Souza Nascimento (renata.souza@fgv.br) on 2015-03-09T18:21:45Z (GMT) No. of bitstreams: 1 UMA ANÁLISE DO GASTO FAMILIAR COM EDUCAÇÃO NO BRASIL E DA PARTICIPAÇÃO DO CRÉDITO EM SEU FINANCIAMENTO.pdf: 915983 bytes, checksum: f5370a8d744e59b71b4483860d8f2d7d (MD5) / Made available in DSpace on 2015-03-10T12:10:11Z (GMT). No. of bitstreams: 1 UMA ANÁLISE DO GASTO FAMILIAR COM EDUCAÇÃO NO BRASIL E DA PARTICIPAÇÃO DO CRÉDITO EM SEU FINANCIAMENTO.pdf: 915983 bytes, checksum: f5370a8d744e59b71b4483860d8f2d7d (MD5) Previous issue date: 2015-02-10 / In the context of the release of the microcredit package and of the payday loan law in 2003, and facing the emergence of credit offers being made to the lower income population, this study aims to evaluate the impact on consumption preferences, specifically those related to educational expenditures. More precisely, it assesses whether the higher credit offer led to a higher investment in education. The data used is drawn from the 2002 and 2008 Consumer Expenditure Survey, or Pesquisa de Orçamentos Familiares (POF), from IBGE, over which were adjusted ordinary least squares regressions. The results show that there was a large expansion in the percentage of families with loans expenditures, as well as a corresponding increase in the amount of these expenditures between the two editions of the survey. Lastly, it was possible to verify that a correlation exists between loan and educational expenditures. / No contexto do lançamento do pacote do microcrédito e da Lei do consignado em 2003, e diante de um novo cenário de oferta de crédito destinada à população de baixa renda, o presente estudo busca avaliar o impacto nas preferências de consumo, especificamente com relação a despesas com educação. A reflexão feita nesse estudo é se esse crédito é utilizado também para garantir investimentos em educação. Os dados utilizados são da Pesquisa de Orçamento Familiar (POF) do IBGE dos anos 2002 e 2008 sobre os quais foram ajustadas regressões de mínimos quadrados ordinários. Os resultados mostram que houve uma grande expansão ao acesso, no que se refere ao percentual de famílias com gastos com empréstimos, e uma correspondente ampliação do valor dessas despesas entre as duas edições da pesquisa analisadas. Por fim, foi possível verificar que existe correlação entre as despesas com empréstimos e com educação.

Submitted by Marcelo Braga Covo (mcovo@ibiunainvest.com.br) on 2015-03-17T16:48:46Z No. of bitstreams: 1 tesecovo.pdf: 385739 bytes, checksum: 253e4c0b5c2b22775f64b6e31b4c0cea (MD5) / Approved for entry into archive by GILSON ROCHA MIRANDA (gilson.miranda@fgv.br) on 2015-04-07T14:13:51Z (GMT) No. of bitstreams: 1 tesecovo.pdf: 385739 bytes, checksum: 253e4c0b5c2b22775f64b6e31b4c0cea (MD5) / Approved for entry into archive by Marcia Bacha (marcia.bacha@fgv.br) on 2015-04-08T17:19:58Z (GMT) No. of bitstreams: 1 tesecovo.pdf: 385739 bytes, checksum: 253e4c0b5c2b22775f64b6e31b4c0cea (MD5) / Made available in DSpace on 2015-04-08T17:20:13Z (GMT). No. of bitstreams: 1 tesecovo.pdf: 385739 bytes, checksum: 253e4c0b5c2b22775f64b6e31b4c0cea (MD5) Previous issue date: 2009-06-01 / Este trabalho demonstra como podemos usar opções sobre o Índice de Taxa Média de Depósitos Interfinanceiros de Um Dia (IDI) para extrair a função densidade de probabilidade (FDP) para os próximos passos do Comitê de Política Monetária (COPOM). Como a decisão do COPOM tem uma natureza discreta, podemos estimar a FDP usando Mínimo Quadrados Ordinários (MQO). Esta técnica permite incluir restrições sobre as probabilidades estimadas. As probabilidades calculadas usando opções sobre IDI são então comparadas com as probabilidades encontradas usando o Futuro de DI e as probabilidades calculadas através de pesquisas. / This paper demonstrates how options on the One-day Brazilian Interfinancial Deposits Index (IDI) can be used to recover the implied probability density function (PDF) for futures Monetary Policy Committee (COPOM) outcomes. The discrete nature of the choices made by the COPOM allows recovering the PDF using ordinary least squares (OLS) estimation. This method also allows the imposition of restrictions on the recovered probabilities. Recovered probabilities using options on IDI are then compared to the probabilities obtained using the futures on DI and the probabilities recovered by surveys.

Cette thèse tente d’analyser comment les œuvres de Violette Leduc ont remis en cause, de façon avant-gardiste, les normes de sexe, de genre et de sexualité dans l’écriture de fiction. Différentes méthodes critiques sollicitées durant le travail permettent de mettre au jour le lien intime et corporel qu’entretient Violette Leduc avec ses œuvres. Ces méthodes permettent également d’entrevoir une poétique décalée, décentrée, qui déconstruit les genres littéraires et offre de nouveaux points de vue sur le monde. Il s’agit par conséquent de montrer dans ce travail que c’est à travers la poétique et non la rhétorique que l’auteure façonne, à la façon de l’artisan, une résistance à la norme. Trois concepts majeurs servent d’outils critiques à l’étude des textes : la performativité, la déconstruction et la limite toujours floue entre réalité et fiction. Ces outils, confrontés aux trois thèmes principaux de la corporéité, de la sexualité et de l’infra-ordinaire qui sont analysés de près dans ces recherches, remettent en question les désignations de « sexe », de « genre » et de « sexualité ». La position du lecteur se voit elle-même décentrée, afin qu’il puisse accéder aux « trésors à prendre » du texte. Il en résulte, conséquemment, la nécessité de reconsidérer les processus de la poétique et les impacts philosophiques, sociologiques et politiques de ces textes. / In this thesis we have tried to analyze how the works of Violette Leduc challenged, in an avant-garde manner, the norms of sex, gender and sexuality in fictional writing. Various critical methods have helped reveal the physical and intimate relationships between Violette Leduc and her own body of work. They have also helped foresee a shifting, off-centered poetics that deconstructs the literary genres and offers alternative views of the world. Hence we have aimed at displaying how the writer crafted, crafts(wo)manlike, a resistance to norms through poetics rather than rhetoric. Three main concepts have been used as critical tools for text analysis : performativity, deconstruction, and an ever-blurred limit between reality and fiction. Confronted to the three main themes of corporeity, sexuality and infra-ordinary – which are thoroughly examined in this work – these tools help questioning the very notions of sex, gender and sexuality. The reader himself is urged to shift off-center in order to get access to the texts’ « treasures to-be-taken ». It has appeared necessary, then, to reconsider the process of poetics and the philosophical, sociological and political impact of these texts.

This study sought to find out ways in which teachers can be supported to implement inclusive education at a primary school in the Kwaluseni district of Swaziland. The government of Swaziland introduced Free Primary Education ( F.P.E) also called mainstreaming. As per governments order, parents brought their learners for grade 1 and that was in 2010 January. That marked the beginning of the problem as teachers were not used to teaching disadvantaged learners in their classes but believed that such learners have to be transferred to specials schools of which the country only has four. The study is a case study using a qualitative approach. Purposive sampling was used in choosing the sample. The key informant were teachers from Kwaluseni primary school. For data collection a designed interview with semi structured and open ended items was used. Data was analysed using codes and there was a search for patterns of thinking or behaviour, words or phrases that appeared with regularity was the coding categories. A report was then written based on the findings. Then recommendations were stated. / Inclusive Education / M. Ed. (Inclusive Education)

Interval analysis is an essential tool in the construction of validated numerical solutions of Initial Value Problems (IVP) for Ordinary (ODE) and Partial (PDE) Differential Equations. A validated solution typically consists of guaranteed lower and upper bounds for the exact solution or set of exact solutions in the case of uncertain data, i.e. it is an interval function (enclosure) containing all solutions of the problem. IVP for ODE: The central point of discussion is the wrapping effect. A new concept of wrapping function is introduced and applied in studying this effect. It is proved that the wrapping function is the limit of the enclosures produced by any method of certain type (propagate and wrap type). Then, the wrapping effect can be quantified as the difference between the wrapping function and the optimal interval enclosure of the solution set (or some norm of it). The problems with no wrapping effect are characterized as problems for which the wrapping function equals the optimal interval enclosure. A sufficient condition for no wrapping effect is that there exist a linear transformation, preserving the intervals, which reduces the right-hand side of the system of ODE to a quasi-isotone function. This condition is also necessary for linear problems and "near" necessary in the general case. Hyperbolic PDE: The Initial Value Problem with periodic boundary conditions for the wave equation is considered. It is proved that under certain conditions the problem is an operator equation with an operator of monotone type. Using the established monotone properties, an interval (validated) method for numerical solution of the problem is proposed. The solution is obtained step by step in the time dimension as a Fourier series of the space variable and a polynomial of the time variable. The numerical implementation involves computations in Fourier and Taylor functoids. Propagation of discontinuo~swaves is a serious problem when a Fourier series is used (Gibbs phenomenon, etc.). We propose the combined use of periodic splines and Fourier series for representing discontinuous functions and a method for propagating discontinuous waves. The numerical implementation involves computations in a Fourier hyper functoid. / Mathematical Sciences / D. Phil. (Mathematics)