Made available in DSpace on 2014-12-17T13:57:04Z (GMT). No. of bitstreams: 1 EleikaRCB_DISSERT.pdf: 6181790 bytes, checksum: eb403e6ca4bd1efd6820ce95d2a4eeed (MD5) Previous issue date: 2011-11-09 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / This dissertation is about the spatial configuration in Natal and processes in the Ponta Negra neighborhood today. Ponta Negra has undergone a number of critical social and spatial changes due to tourism development after the 1990s. It is of special interest to consider the intensification of real estate investment after 2000, when the new airport terminal, located in the neighboring municipality of Parnamirim, was in use. Ponta Negra is the place where most tourists go to, so attracting considerable public investments. New agents of transformation have produced change in the neighborhood as well. The present study aims at analysing the spatial processes in this part of the city. Here, the spatial configuration that resulted from extended real estate investments, both public and private, in recent years, is analysed in detail. The study identifies the multually differentiated, however internally homogenous areas. The concepts of production of space, contemporanean urban development and spatial dynamics are discussed. The research is based on document analysis and field work. Results were plotted to maps and tables. A detailed analysis of the spatial processes in the Ponta Negra neighborhood is undertaken as a conclusion, considering the contemporanean global scenario / A presente disserta??o trata da configura??o do espa?o contempor?neo em Natal e os processos espaciais de Ponta Negra. O bairro de Ponta Negra sofreu, com a emerg?ncia do turismo, mudan?as espaciais e sociais a partir da d?cada de 1990, em particular considerando a intensifica??o de investimentos imobili?rios a partir do marco temporal de 2000, devido ao in?cio do funcionamento do novo terminal de passageiros do aeroporto Augusto Severo. Ponta Negra configura-se ent?o como maior ponto de recep??o, de lazer e aloca??o de investimentos p?blicos de Natal. Assim, produzem modifica??es no bairro, novos agentes da produ??o do espa?o. O presente estudo tem por objeto os novos processos espaciais no bairro de Ponta Negra. Aqui, analisar-se a configura??o resultante dos novos investimentos imobili?rios, p?blicos e privados, realizados no bairro nos ?ltimos anos, identificando a exist?ncia de ?reas que, embora homog?neas, s?o diferenciadas entre si. Tr?s grandes discuss?es te?ricas Produ??o do Espa?o Capitalista, Desenvolvimento Urbano Contempor?neo e Din?mica Espacial d?o suporte ao trabalho, al?m da pesquisa documental e de campo (levantamento de uso e ocupa??o do solo e levantamento fotogr?fico), transportada para mapas tem?ticos interpretativos e tabelas. Conclu?mos a pesquisa, com a an?lise detalhada dos processos espaciais do bairro de Ponta Negra sob a influ?ncia de processos globais contempor?neos

Made available in DSpace on 2014-12-17T15:15:04Z (GMT). No. of bitstreams: 1 MarioAM.pdf: 1150858 bytes, checksum: 72544ace95c9eefd2f93d90922e6d6ec (MD5) Previous issue date: 2007-03-21 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The magnetic order of bylayers composed by a ferromagnetic film (F) coupled with an antiferromagnetic film (AF) is studied. Piles of coupled monolayers describe the films and the interfilm coupling is described by an exchange interaction between the magnetic moments at the interface. The F has a cubic anisotropy while the AF has a uniaxial anisotropy. We analyze the effects of an external do magnetic field applied parallel to the interface. We consider the intralayer coupling is strong enough to keep parallel all moments of the monolayer an then they are described by one vector proportional to the magnetization of the layer. The interlayer coupling is represented by an exchange interaction between these vectors. The magnetic energy of the system is the sum of the exchange. Anisotropy and Zeeman energies and the equilibrium configuration is one that gives the absolute minimum of the total energy. The magnetization of the system is calculated and the influence of the external do field combined with the interfilm coupling and the unidirectional anisotropy is studied. Special attention is given to the region near of the transition fields. The torque equation is used to study dynamical behavior of these systems. We consider small oscillations around the equilibrium position and we negleet nonlinear terms to obtain the natural frequencies of the system. The dependence of the frequencies with the external do field and their behavior in the phase transition region is analized / O ordenamento de bicamadas magn?ticas compostas por um filme ferromagn?tico (F) fino acoplado com um filme antiferromagn?tico (AF) ? estudado, considerando que os filmes podem ser descritos por uma pilha de camadas monoat?micas (infinitas) acopladas. O acoplamento entre os filmes ? representado pela intera??o entre os spins das monocamadas da interface. Consideramos que o filme F tem uma anitropia c?bica e os momentos do filme AF sentem a presen?a de uma anisotropia uniaxial. Adicionalmente, os spins que comp?em as camadas da interface sentem a presen?a de uma anisotropia unidirecional. Os efeitos de um capo magn?tico est?tico aplicado paralelo ao plano da interface s?o analisados. Consideramos que a intera??o de troca entre os momentos magn?ticos de uma mesma monocamada ? suficientemente forte para mant?-los alinhados em uma mesma dire??o. Cada camada monoat?mica ? representada por um ?nico vetor (vetor magnetiza??o) proporcional ao momento magn?tico total da monocamada, e a intera??o entre estes vetores ? proporcional a intera??o efetiva entre as monocamadas. A energia magn?tica do sistema ? escrita como a soma das energias de troca, anisotropia e Zeeman, e as configura??es de equil?brio s?o obtidas atrav?s da minimiza??o da energia. A magnetiza??o do sistema ? calculada em fun??o do campo magn?tico dc aplicado e o efeito do meesmo, combinando com a intera??o interfilmes e anisotropia unidirecional, ? investrigado. A aten??o especial ? dada ?s regi?es de campo pr?ximas as transi??es de fase. Usamos a equa??o do torque para estudae o comportamento din?mico desses sistemas. Considerando que os vetores magnetiza??o oscilam em torno da posi??o de equil?brio, com amplitudes suficientemente pequenas para que os efeitos n?o lineares possam ser desprezados, calculamos as "freq??ncias naturais" do sistema dando especial aten??o as duas de menos valor. A depend?ncia das freq??ncias com a intensidade do campo ? determinada e o comportamento nas regi?es de transi??o de fase ? analisado

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-02-10T16:44:40Z No. of bitstreams: 1 GlydianneMaraDiogenesFernandes_TESE.pdf: 3862064 bytes, checksum: fefa5eff9a9888901a0fc8b23ab2f361 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-02-10T21:36:27Z (GMT) No. of bitstreams: 1 GlydianneMaraDiogenesFernandes_TESE.pdf: 3862064 bytes, checksum: fefa5eff9a9888901a0fc8b23ab2f361 (MD5) / Made available in DSpace on 2017-02-10T21:36:27Z (GMT). No. of bitstreams: 1 GlydianneMaraDiogenesFernandes_TESE.pdf: 3862064 bytes, checksum: fefa5eff9a9888901a0fc8b23ab2f361 (MD5) Previous issue date: 2016-09-02 / As novas tecnologias que utilizam a recupera??o avan?ada de petr?leo surgiram da necessidade de se retirar o ?leo que ainda permanece no reservat?rio ap?s a recupera??o prim?ria. O objetivo desses m?todos ? elevar o fator de recupera??o do ?leo. Dessa forma, alguns projetos passam a se tornar vi?veis economicamente quando se utilizam esses m?todos. Os m?todos t?rmicos, dentre eles a inje??o de vapor, promovem a recupera??o do ?leo atrav?s da inser??o de energia t?rmica dentro do reservat?rio. O aumento da temperatura faz com que o ?leo tenha a sua viscosidade reduzida, aumentando assim, seu deslocamento em dire??o aos po?os de produ??o. O processo de drenagem gravitacional assistida por vapor (SAGD) ? um m?todo avan?ado de recupera??o. Sua configura??o apresenta dois po?os horizontais paralelos, um acima do outro. O vapor ? injetado de forma cont?nua ao longo do po?o injetor, em seguida forma-se uma c?mara de vapor que cresce at? encontrar os limites do reservat?rio. Este ?leo tem, ent?o, sua viscosidade reduzida e, pela a??o das for?as gravitacionais, ? drenado em dire??o ao po?o produtor. Neste contexto, esta pesquisa teve como objetivo realizar um estudo de diferentes configura??es de po?os injetores no processo SAGD, considerando os efeitos das perdas de carga e calor no po?o injetor em reservat?rios do nordeste brasileiro. Um planejamento fatorial foi utilizado para verificar a influ?ncia dos par?metros estudados no fator de recupera??o. Foi realizada tamb?m uma an?lise t?cnico econ?mica das configura??es dos po?os injetores com a finalidade de analisar a rentabilidade dos projetos estudados. Para a realiza??o das simula??es num?ricas foi utilizado o simulador t?rmico STARS da CMG (Computer Modelling Group). Os resultados mostraram que os po?os injetores inclinados apresentaram uma menor produ??o em rela??o ? configura??o com po?os horizontais. A configura??o com po?os injetores deslocados em rela??o ao po?o produtor (W-SAGD), para vaz?es de inje??o a partir de 100 ton/dia, levou a forma??o de uma c?mara de vapor maior e mais eficiente. Foi observado tamb?m que a utiliza??o de po?os injetores verticais (V-SAGD), para maiores vaz?es de inje??o de vapor, apresentou uma produ??o acumulada de ?leo menor, por?m, similar ao SAGD com po?o injetor horizontal. Na an?lise econ?mica, o modelo SAGD apresentou os maiores VPLs. / New technologies that use the enhanced oil recovery emerged the need to remove the oil that remains in the reservoir after primary recovery. The goal of these methods is to increase the oil recovery factor. Thus, some projects start to become economically viable when using these methods. The thermal methods, including steam injection, promote the recovery of oil through the thermal energy within the insert reservoir. The increased temperature causes the oil to have its viscosity reduced, thereby increasing its speed towards the production wells. The steam assisted gravity drainage process (SAGD) is an advanced method of recovery. Its configuration has two parallel horizontal wells, one above the other. The steam is injected continuously during the injection well, and then forms a steam chamber which grows to find the limits of the reservoir. This oil is then reduced its viscosity and, by the action of gravitational forces, it is drained toward the producing well. In this context, this study aimed to carry out a study of different configurations of injection wells in SAGD process, considering the effects of load loss and heat in the injection well in the Brazilian northeast reservoirs. A factorial design was used to investigate the influence of the parameters studied in the recovery factor. It also performed an economic analysis of the technical settings of injection wells in order to analyze the profitability of the projects studied. To perform the numerical simulations we used the thermal simulator CMG STARS (Computer Modelling Group). The results showed that the inclined injection wells had a lower production compared to the configuration with horizontal wells. A setting producer injectors offset from the well (W-SAGD) for injection flowrates from 100 ton/day, led to the formation of a vapor chamber larger and more efficient. It was also observed that the use of vertical injection wells (VSAGD), for larger flowrates, showed a lower cumulative production of oil, however, similar to SAGD injector well horizontally. In the economic analysis, the SAGD model showed the highest NPVs.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-08-01T15:43:01Z No. of bitstreams: 1 RafaelCardosoPereira_DISSERT.pdf: 1817897 bytes, checksum: 903100b393275d014c5095608b4e8e81 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-08-09T13:54:55Z (GMT) No. of bitstreams: 1 RafaelCardosoPereira_DISSERT.pdf: 1817897 bytes, checksum: 903100b393275d014c5095608b4e8e81 (MD5) / Made available in DSpace on 2017-08-09T13:54:55Z (GMT). No. of bitstreams: 1 RafaelCardosoPereira_DISSERT.pdf: 1817897 bytes, checksum: 903100b393275d014c5095608b4e8e81 (MD5) Previous issue date: 2017-06-21 / A habilidade de seguir ou de se mover acompanhando uma pessoa ou um objeto especificado, capaz de se deslocar, ? uma per?cia necess?ria em diversos agentes aut?nomos. Tais agentes s?o amplamente utilizados para realizar v?rias tarefas presentes no cotidiano, podendo ser aplicados tanto em tarefas corriqueiras, como em carrinhos de supermercado ou limpeza de ambientes, quanto ?s tarefas de mais alto risco, como em grandes ind?strias ou carros aut?nomos. A ideia apresentada aqui ? a de desenvolver um m?todo de rastreamento e persegui??o de alvo aplic?vel ? rob?s m?veis terrestres com rodas que possuem restri??es em sua movimenta??o, que fazem com que t?cnicas de controle padr?o nem sempre possam ser aplicadas. O trabalho desenvolvido aqui tamb?m leva em considera??o a utiliza??o de uma t?cnica de detec??o de alvo que possa se tornar adapt?vel a praticamente qualquer tipo de alvo estipulado pelo projetista de acordo com as necessidades de sua aplica??o. O desenvolvimento dos m?todos propostos foram realizados agregando t?cnicas de reconhecimento de padr?es utilizados em c?meras de padr?o RGB comuns, t?cnicas de estimativa de posi??o e orienta??o e algoritmos de controle inteligentes, que possuem baixo custo computacional, aplic?veis a rob?s com restri??es de movimenta??o. / The ability to follow or move along with a specified moving person or object, is a necessary skill in several autonomous agents. Such agents are widely used to perform various tasks in everyday life, and they can be applied either in everyday tasks, such as in supermarket carts or cleaning environments, as well in high-risk tasks like large industries or autonomous cars. The idea presented here is to develop a target tracking and following method applicable to mobile wheeled land robots that have restrictions on their movement, which means that standard control techniques cannot always be applied. The work developed here also takes into account the use of a target detection technique that can be adapted to practically any type of target stipulated by the designer according to the needs of its application. The development of the proposed methods is accomplished by adding standard recognition techniques used in common RGB type cameras, position estimation and orientation techniques, and intelligent control algorithms, with a low computational cost, applicable to robots with movement restrictions.

Made available in DSpace on 2016-04-04T18:22:01Z (GMT). No. of bitstreams: 1 Dirceu Piccinato Junior .pdf: 18445166 bytes, checksum: b6f0a1aa40fb3428e66bcb669e6f5346 (MD5) Previous issue date: 2012-02-24 / This paper seeks to trace a historical analysis of urban land ownership, land heritage (religious and secular) in the training process and the establishment of urban centers in northeastern S?o Paulo State between the years 1800 and 1930, focusing more attention to two significant events that favored the construction of an urban network in this region: the migration of incoming miners and the cycle of coffee along with the arrival of Cia Mogiana these parts. The establishment of an urban center it is a chapel, parish and village was only possible during the Colony and the Empire, by granting lands to the heritage of a holy devotion. With the advent of the Republic, on the actions of capitalist interests, the donation of land was no longer the sacred as well, but the commercialization of land, or profit. The scrutiny as to how the appointments issued by each of the two historical dimensions conform sought the transformation of this part of the state territory and the creation of urban forms. We shall show, however, that even calling for a linearity in the award process, and ownership of urban design, practices, experiences and local dynamics were crucial to the definition of the nuclei. For the preparation of the dissertation, have been included relevant documents and images of urban farming initiatives, as well as important previous studies, to identify possible links between the issues surrounding land and property circumstances that presented themselves in every situation and the determinations imposed by government religious and / or civil liability. Thus, we try to treat the grant of land as an urban process developed in a regional context that holds conjunctures of conflicts and interests in configuration of urban. / Este trabalho busca tra?ar uma an?lise hist?rica sobre a apropria??o da terra urbana, patrim?nio fundi?rio (religioso e laico) no processo de forma??o e funda??o de n?cleos urbanos no nordeste do Estado de S?o Paulo entre os anos de 1800 e 1930, detendo-se com maior aten??o em dois momentos significativos que favoreceram a constru??o de uma rede urbana nesta regi?o: o movimento migrat?rio dos entrantes mineiros e o ciclo da cafeicultura, juntamente com a chegada da Cia. Mogiana nestas paragens. O estabelecimento de um n?cleo urbano, seja ele uma capela, freguesia ou vila, s? era poss?vel, durante a Col?nia e o Imp?rio, por meio da concess?o de terras para o patrim?nio de um santo de devo??o. Com o advento da Rep?blica, sob as a??es dos interesses capitalistas, a doa??o de terra para a forma??o de n?cleos urbanos n?o tinha mais como bem o sagrado, mas a comercializa??o da terra, ou seja, o lucro. A an?lise atenta para o modo como as designa??es emanadas por cada uma das dimens?es hist?ricas procuraram conformar a transforma??o desta parte do territ?rio paulista e a cria??o das formas urbanas. Pretende-se mostrar, entretanto, que mesmo conclamada uma linearidade no processo de concess?o, apropria??o e delineamento do solo urbano, pr?ticas, experi?ncias e din?micas locais foram determinantes para a defini??o dos n?cleos urbanos. Para a elabora??o da disserta??o, foram consultados documentos escritos e imagens pertinentes a iniciativas das cria??es urbanas, bem como importantes estudos precedentes, procurando identificar poss?veis v?nculos entre as quest?es envolvendo as terras patrimoniais, circunst?ncias que se apresentavam em cada situa??o e as determina??es impostas pelas administra??es religiosa e/ou civil. Desse modo, procura-se tratar a concess?o da terra urbana como um processo desenvolvido num contexto regional que guarda conjunturas particulares de conflitos e interesses na configura??o do urbano.

Made available in DSpace on 2014-12-17T13:57:05Z (GMT). No. of bitstreams: 1 RodrigoCN_DISSERT_Parte 1.pdf: 2967594 bytes, checksum: ce42768f99a0d8a486d1fbac1a52af00 (MD5) Previous issue date: 2011-10-27 / This study focuses on the building ensemble of Avenida Roberto Freire, a main road in Natal, Brazil, as a material expression of the confluence of various factors among which the following may be emphasized: high level of accessibility due to urban spatial re-structuring and the growth of the real estate market, in view of the increasing number of consumers, who arrived in Natal within the last decades. The intense urban modification process that has been going on in Natal since at least the 1980s, has engendered the formation of long axial lines which express the expansion dynamics and some of the forces subjacent to it. Avenida Roberto Freire has been an iconic example of an urban thoroughfare where architecture becomes primarily a communication support that can be perceived by fast moving passers-by, what brings it close to the venturian concept of strip (Venturi at al, 1972). The building types that line the road not only respond to the dynamics in process but also contribute to intensify it, as they house a variety of uses which attract people and generate more movement. The dynamics is further strengthened by the action of the real estate business which benefits from the increase of highly accessible locations, and from the private and public investments and incentives to tourism that aim to insert this city into the globalized world. Although the intention of reconstituting part of the history of density increase on this avenue in a diachronical perspective was attempted within the limits of the available references and documentation, the central contribution of this study is to understand the relations between topological accessibility and the typological nature of the building ensemble. By observing the synchronic morphological frame resulting from the spatial configuration analysis pertinent to this avenue (cf. Hillier and Hanson,1984) and the inventory and classification of the building ensemble there existing, this study aims to understand how architecture responds to accessibility in view of the real estate pressure, boosted by a cosmopolitanizing process brought about by the continuous flow of foreign and Brazilian arrivals as visitors, temporary or permanent residents / Este estudo aborda o perfil edil?cio da avenida Engenheiro Roberto Freire, como express?o material da conflu?ncia de fatores dentre os quais se destacam o alto grau de acessibilidade como conseq??ncia da reestrutura??o espacial urbana, e a amplia??o do mercado imobili?rio em face da presen?a crescente de consumidores que t?m chegado a Natal nas ?ltimas d?cadas. O intenso processo de remodela??o urbana por que vem passando Natal desde, pelo menos, a d?cada de 1980 tem engendrado a forma??o de longos eixos vi?rios que expressam exemplarmente essa din?mica e algumas das for?as subjacentes a ela. A avenida tem sido um dos exemplos ic?nicos de eixos vi?rios nos quais a arquitetura torna-se, primordialmente, suporte de comunica??o capaz de ser percebida por passantes em r?pido movimento, aspecto que a faz aproximar-se do conceito venturiano de strip (Venturi et al, 1972). Os tipos edil?cios que ali abrigam usos diversificados n?o s? respondem ? din?mica em curso, mas tamb?m contribuem para intensific?-la e realiment?-la, na medida em que atraem pessoas e geram mais movimento. Some-se a isso a atua??o do setor imobili?rio que se beneficia com a amplia??o de localiza??es dotadas de alta acessibilidade, e com incentivos p?blicos e privados ao turismo, visando inserir a cidade no mundo globalizado. Embora se tenha tido a inten??o de reconstituir parte da hist?ria do adensamento da avenida em perspectiva diacr?nica, a contribui??o central desse estudo ? entender rela??es entre acessibilidade topol?gica e a natureza tipol?gica do acervo edil?cio. Mediante a leitura de um quadro morfol?gico sincr?nico resultante da an?lise da configura??o espacial que cont?m a avenida (cf. Hillier e Hanson, 1984), e do invent?rio e classifica??o do acervo edil?cio que l? est?, este estudo objetiva compreender como a arquitetura responde ? acessibilidade vis-?-vis o desenvolvimento do mercado imobili?rio, impulsionado por um processo de cosmopolitismo que tem ocorrido pela cont?nua chegada de visitantes e moradores tempor?rios ou permanentes, nacionais e estrangeiros

Made available in DSpace on 2016-04-04T18:21:37Z (GMT). No. of bitstreams: 1 Karina Jorge.pdf: 3084239 bytes, checksum: 3de3e9558aa23fb366967551b5a3e910 (MD5) Previous issue date: 2006-12-13 / The intention of this research was to investigate as in the city of S?o Paulo, in elapsing of century XIX, the co-participation of knowing doctors to them, of engineering, of the architecture and the performance of the administrators they had implied in the modification in the urban configuration of the city and had defined a new structure in organization and functioning. It investigates, over all, the debate and practical the relative ones to the implantation of the hospitals, isolation hospitals, cemeteries and saint marries of mercy through the urban historical study of the S?o Paulo city. It tried to perceive how the urban practice implemented by the administrators through the doctors and engineers were based on the miasma theory. These buildings, according to related theory, would contain organic substance that when decomposing, exhaled miasmas, and therefore, they would have to be situated outside of the urban defined borders at that time. The studies had been made under the point of view of the public health, investigating the origin and formation of the buildings relating them, and the relation of these buildings with the urban way. It is also distinguished in this research, how the prescriptions in the medicine and architecture treaties about the salubrious of the cities, had been transferred to the legislation, through the Municipal Laws. By means of the law off August 30th of 1828, that it extinguished the positions of Physicist and Surgeon, the City councils had started to be responsible for public health and, through the Imperial Decree of October 1st of 1828, established it form of the elections of the members of the City councils and included the first Code of Positions in the organic law of the respective Chambers. / O prop?sito dessa pesquisa foi o de investigar como na cidade de S?o Paulo, no decorrer do s?culo XIX, a co-participa??o dos saberes m?dicos, da engenharia, da arquitetura e a atua??o dos administradores implicaram na modifica??o no tecido urbano da cidade e definiram uma nova estrutura de organiza??o e funcionamento. Investiga, sobretudo, o debate e as pr?ticas relativas ? implanta??o dos hospitais, lazaretos, cemit?rios e casas de miseric?rdia atrav?s do estudo hist?rico urban?stico da cidade de S?o Paulo. Procurou-se perceber como as pr?ticas urbanas implementadas pelos administradores atrav?s dos m?dicos e engenheiros aos seus servi?os estavam fundamentadas na teoria miasm?tica. Estes edif?cios, segundo a referida teoria, conteriam mat?ria org?nica que ao se decompor exalavam miasmas e, portanto, deveriam se localizar fora do meio urbano definido na ?poca. Os estudos foram feitos sob o ponto de vista da sa?de p?blica, investigando a origem e forma??o dos edif?cios relacionados ? mesma e a rela??o desses edif?cios com o meio urbano. Destaca-se nessa pesquisa tamb?m, como as prescri??es presentes nos tratados de medicina e arquitetura sobre a salubridade das cidades foram transferidas para a legisla??o, atrav?s das Posturas Municipais. Mediante a lei de 30 de agosto de 1828, que extinguiu os cargos de F?sico-mor e Cirurgi?o-mor, as C?maras Municipais passaram a ser respons?veis pela sa?de p?blica e, atrav?s do Decreto Imperial de 1? de outubro de 1828, estabeleceu-se a forma das elei??es dos membros das C?maras Municipais e incluiu-se o primeiro C?digo de Posturas na lei org?nica das respectivas C?maras.