Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2018-03-12T13:20:57Z No. of bitstreams: 1 GillesVelleneuveTrindadeSilvano_DISSERT.pdf: 2067675 bytes, checksum: d29278b2012d7b784ea6116d148d7e95 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2018-03-14T13:19:37Z (GMT) No. of bitstreams: 1 GillesVelleneuveTrindadeSilvano_DISSERT.pdf: 2067675 bytes, checksum: d29278b2012d7b784ea6116d148d7e95 (MD5) / Made available in DSpace on 2018-03-14T13:19:37Z (GMT). No. of bitstreams: 1 GillesVelleneuveTrindadeSilvano_DISSERT.pdf: 2067675 bytes, checksum: d29278b2012d7b784ea6116d148d7e95 (MD5) Previous issue date: 2017-09-04 / Redes sem-fio t?m evolu?do consideravelmente nos ?ltimos anos e consequentemente tem sido aplicadas nos mais diversos cen?rios, desde redes locais sem-fios at? redes de sensores sem-fios para Internet das Coisas (Internet of Things - IoT). Cada nova aplica??o apresenta suas pr?prias caracter?sticas, especificidades e consequentemente novos desafios que devem ser vencidos para que ela se torne vi?vel e seja enviada para produ??o e embarcada em dispositivos reais. Por?m, os simuladores de redes em geral n?o fornecem algumas importantes funcionalidades para as simula??es e avalia??es de aplica??es de redes sem-fio. Por exemplo, os simuladores exigem implementa??o da aplica??o direcionada para o ambiente do simulador exigindo o dobro de esfor?o dos desenvolvedores e problemas de integra??o entre as tecnologias utilizadas durante os testes e as utilizadas para embarcar a aplica??o em dispositivos reais. Al?m disso, os simuladores devem dar suporte a em cen?rios mais complexos de redes sem-fio como ambientes com alta mobilidade ou alta densidade de n?s. Por fim, o comportamento simulado por softwares e n?o na an?lise de dispositivos reais utilizando c?digo final, compilado para os dispositivos reais finais, n?o fornece a melhor visualiza??o do comportamento da aplica??o simulada. Para preencher essas lacunas desenvolvemos o LVWNet: um ambiente e simula??o baseado em virtualiza??o Linux para a avalia??o de aplica??es de redes sem-fio que oferece suporte a simula??o de c?digo real e ambiente h?brido de integra??o entre n?s virtuais e dispositivos reais, al?m de flexibilidade e baixo consumo de recursos. Nesse trabalho s?o apresentados os detalhes de implementa??o do LVWNEt e suas funcionalidades b?sicas atrav?s da simula??o de uma rede sem-fio IEEE 802.11s em um ambiente h?brido com suporte a mobilidade, no qual foram desenvolvidos testes para avaliar a autenticidade dos dados de simula??o obtidos durante os testes que comprovaram sua efici?ncia como ambiente de avalia??o de redes sem-fios. / Wireless networks have evolved considerably in recent years and have consequently been applied in a wide range of scenarios, from wireless local area networks to Internetof- Things (IoT) wireless sensor networks. Each new application presents its own characteristics, specificities and consequently new challenges that must be overcome in order for it to become viable and be sent to production and shipped to real devices. However, network simulators generally do not provide some important functionalities for the simulations and evaluations of wireless applications. For example, simulators require implementation of the application targeted to the simulator environment requiring twice the effort of the developers and problems of integration between the technologies used during the tests and those used to ship the application to real devices. In addition, simulators must support in more complex scenarios of wireless networks such as environments with high mobility or high node density. Finally, software-simulated behavior rather than real device analysis using final code, compiled for the final real devices, does not provide the best visualization of simulated application behavior. To fill these gaps we have developed LVWNet: a Linux-based virtualization-based simulation and environment for evaluating wireless network applications that supports real-world simulation and hybrid integration between virtual nodes and real devices, as well as flexibility and low resource consumption. This paper presents the implementation details of the LVWNEt and its basic functionalities through the simulation of an IEEE 802.11s wireless network in a hybrid environment with mobility support, in which tests were developed to evaluate the authenticity of the simulation data obtained during the tests that have proven their efficiency as evaluation environment of wireless networks.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2018-03-12T13:20:57Z No. of bitstreams: 1 JulioCesarMeloGomesDeOliveira_DISSERT.pdf: 3345480 bytes, checksum: 4a29c5363f621c0fa11407514ac869fa (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2018-03-14T14:35:59Z (GMT) No. of bitstreams: 1 JulioCesarMeloGomesDeOliveira_DISSERT.pdf: 3345480 bytes, checksum: 4a29c5363f621c0fa11407514ac869fa (MD5) / Made available in DSpace on 2018-03-14T14:35:59Z (GMT). No. of bitstreams: 1 JulioCesarMeloGomesDeOliveira_DISSERT.pdf: 3345480 bytes, checksum: 4a29c5363f621c0fa11407514ac869fa (MD5) Previous issue date: 2017-12-19 / Historicamente as cidades seguem modelos de planejamento reativos onde o gestor toma decis?es conforme a ocorr?ncia dos problemas. Por outro lado, o crescimento exponencias das Tecnologias da Informa??o e Comunica??o (TIC) tem permitido que diversos sensores, dispositivos, sistemas e objetos se conectem, gerando dados que podem ser transformados em informa??o e usados em um paradigma de planejamento urbano mais eficiente onde as decis?es podem ser tomadas antes que os problemas ocorram. Assim, nesse trabalho ser? desenvolvido um software capaz de estimar a quantidade de di?xido de carbono, a partir de leituras de sensores existentes em ve?culos, que ir? contribuir para o planejamento proativo das cidades a partir do monitoramento da polui??o veicular. T?cnicas de CrowdSensing e um leitor On-Board Diagnostic (OBD-II) ser?o utilizados para extrair dados dos ve?culos em tempo real, armazenados localmente nos aparelhos que foram coletados. Por fim, podemos ver que a partir das informa??es obtidas, existe a possibilidade de se extrair informa??es a respeito do funcionamento do ve?culo e at? mesmo realizar infer?ncias sobre a din?mica dos ve?culos nas cidades, mostrando potencial para o desenvolvimento de ferramentas auxiliares a gest?o dos centros urbanos. / Traditionally, cities planning has followed reactive decision models based on the occurrence of problems. With the development and spread of communication and information technologies, the interconnection of electronic devices has opened a new era of data exchanging and processing, potentially supporting more efficient decisions in modern cities. This paper then proposes a software, capable of estimating the amount of carbon dioxide from existing sensor readings in vehicles, which aims to support more proactive planning and management of modern cities, addressing the problem of vehicular pollution monitoring. For that, a crowdsensing approach and the OBD-II standard are exploited to dynamically extract data from vehicles to be processed and delivered. Finally, we can see that with the information obtained, it is possible to extract information about the operation of the vehicle and even make inferences about the dynamics of the vehicles in the cities, showing potential for the development of auxiliary tools for the management of urban centers .

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2018-03-12T13:20:58Z No. of bitstreams: 1 RuannVictorDeAndradeLira_DISSERT.pdf: 2079955 bytes, checksum: 7e5a2d74f18feafa657b4ed17fb4b73e (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2018-03-14T15:03:08Z (GMT) No. of bitstreams: 1 RuannVictorDeAndradeLira_DISSERT.pdf: 2079955 bytes, checksum: 7e5a2d74f18feafa657b4ed17fb4b73e (MD5) / Made available in DSpace on 2018-03-14T15:03:08Z (GMT). No. of bitstreams: 1 RuannVictorDeAndradeLira_DISSERT.pdf: 2079955 bytes, checksum: 7e5a2d74f18feafa657b4ed17fb4b73e (MD5) Previous issue date: 2017-11-24 / As aplica??es de antenas de microfita abrangem uma grande ?rea das Telecomunica??es, principalmente em sistemas que necessitem de componentes de volume e peso reduzido, como comunica??es aeroespaciais. Da? in?meros pesquisadores t?m estudado, cada vez mais, t?cnicas de otimiza??o no projeto dessas antenas. Assim, esse trabalho tem como principal objetivo a otimiza??o de projeto de antenas de microfita. Para isso, utiliza-se o M?todo Taguchi no qual cada par?metro f?sico ? definido a partir da frequ?ncia de opera??o desejada pelo usu?rio, das caracter?sticas el?tricas do diel?trico que ser? utilizado para fabricar a antena (espessura do substrato e constante diel?trica do material) e da defini??o dos limites de otimiza??o (valores m?ximo e m?nimo) que os par?metros f?sicos podem atingir. Especificamente, a an?lise usa o m?todo Taguchi com tratamento dos limites, para que o valor final otimizado n?o fique fora da faixa especificada. Na an?lise, s?o considerados patches retangulares e circulares, para projetos nas faixas de frequ?mcia especificas para WLAN. No trabalho, s?o apresentados resultados num?ricos e experimentais para a perda de retorno. S?o feitas compara??es entre esses resultados. Uma boa concord?ncia entre os resultados ? observada. S?o apresentadas, ainda, sugest?es de continuidade do trabalho. / The applications of microstrip antennas cover a large area of Telecommunications, especially in systems that require components of volume and reduced weight, such as aerospace communications. Hence numerous researchers have been studying, more and more, techniques of optimization in the design of these antennas. Thus, this work has as main objective the optimization of microstrip antenna design. For this, the Taguchi Method is used in which each physical parameter is defined from the frequency of operation desired by the user, of the electric characteristics of the dielectric that will be used to make the antenna (substrate thickness and dielectric constant of the material) and definition of optimization limits (maximum and minimum values) that physical parameters can achieve. Specifically, the analysis uses the Taguchi method with boundary treatment so that the optimum final value does not fall outside the specified range. In the analysis, rectangular and circular patches are considered for projects in the frequency bands specific to WLAN. In the paper, numerical and experimental results are presented for loss of return. Comparisons are made between these results. A good agreement between the results is observed. Suggestions for continuity of work are also presented.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-12-15T17:33:45Z No. of bitstreams: 1 RomuloFagundesCantanhede_DISSERT.pdf: 11043552 bytes, checksum: 870e5ee589d9e1687ad5ec43c2227011 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-12-28T18:37:33Z (GMT) No. of bitstreams: 1 RomuloFagundesCantanhede_DISSERT.pdf: 11043552 bytes, checksum: 870e5ee589d9e1687ad5ec43c2227011 (MD5) / Made available in DSpace on 2016-12-28T18:37:33Z (GMT). No. of bitstreams: 1 RomuloFagundesCantanhede_DISSERT.pdf: 11043552 bytes, checksum: 870e5ee589d9e1687ad5ec43c2227011 (MD5) Previous issue date: 2016-04-27 / A IoT (Internet of Things) prop?e que sistemas computacionais sejam formados por diversos dispositivos produtores e/ou consumidores de informa??o, permitindo o desenvolvimento de diversas solu??es baseadas na coleta e an?lise de dados. Por?m, al?m da coleta e an?lise de dados, ? necess?rio tamb?m tomar decis?es e agir com base nas mesmas. Nossa proposta ? de desenvolver uma plataforma de suporte para aplica??es de IoT permitindo n?o somente a coleta e an?lise de dados, mas tamb?m seu uso para a tomada de decis?o e a??o. A plataforma permite que qualquer dispositivo com acesso ? Internet possa enviar informa??es em formato variado, suportando o acompanhamento em tempo real dos dados coletados, assim como a defini??o de mecanismos de tomada de decis?o, como a ativa??o de um determinado dispositivo ou a gera??o de alertas. Como estudo de caso, a plataforma foi aplicada para monitorar um ambiente hospitalar. Alguns experimentos controlados foram realizados com o objetivo de avaliar a plataforma, permitindo a defini??o de alguns par?metros de dimensionamento para sua implanta??o. / The IoT(Internet of Things) proposes that computer systems are formed by several information producers and/or consumer devices, allowing the development of various solutions based on data collection and analysis. However, in addition to data collection and analysis, it is also necessary to make decisions and act on them. This work?s proposal is to develop a support platform for IoT applications, not only allowing data collection and analysis, but also their use for decision making and action. The platform will allow any device with Internet access to send information in various formats, supporting real-time monitoring of the collected data, as well as the definition of decision-making mechanisms, such as the activation of a particular device or the generation of alerts. As a case study, the platform was applied to monitor a hospital style environment. Some controlled experiments were conducted to evaluate the platform, providing the means for the definition of some design parameters for its deployment.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-01-04T13:19:42Z No. of bitstreams: 1 RosieryDaSilvaMaia_TESE.pdf: 4606593 bytes, checksum: bd4ae91dffeac90bf5c077bfca0d1069 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-01-05T19:24:44Z (GMT) No. of bitstreams: 1 RosieryDaSilvaMaia_TESE.pdf: 4606593 bytes, checksum: bd4ae91dffeac90bf5c077bfca0d1069 (MD5) / Made available in DSpace on 2017-01-05T19:24:44Z (GMT). No. of bitstreams: 1 RosieryDaSilvaMaia_TESE.pdf: 4606593 bytes, checksum: bd4ae91dffeac90bf5c077bfca0d1069 (MD5) Previous issue date: 2012-12-18 / IDeM-MRS ? um modelo com regras formais para gerenciar a coopera??o de um grupo de rob?s, quando aplicados em resolu??o de tarefas. Esse formalismo ? totalmente baseado em modelos sociais de aprendizagem de indiv?duos reais e coordena eficientemente o sistema multirrob?, propiciando a Assimila??o e Acomoda??o do conhecimento atrav?s de trocas de experi?ncias entre os componentes do grupo. Algumas quest?es foram particulamente tratadas, como uma representa??o realista do ambiente multirrob? (que envolve a miss?o global, as tarefas que pertencem a essa miss?o e os rob?s atuantes) e uma forma de sele??o de tarefas, baseada em teorias de abordagens socias de aprendizagem, como as pregadas por Lev Vygotsky, Jean Piaget e John Watson. Essas teorias, j? consolidadas para indiv?duos reais, permitem a execu??o cooperativa eficiente pelos rob?s. IDeM-MRS pode ser usado em diferentes tipos de miss?es, desde as mais simples ?s mais complexas. Os experimentos e resultados validam a efici?ncia dessa proposta em compara??o a um modelo emp?rico tradicional. / IDeM-MRS is a model with formal rules to manage the cooperation of multi-robot systems, if it is applied in tasks execution. This formalism is completely based on learning social models of real individuals and efficiently coordinates the group allowing knowledge assimilation and accommodation through experiences exchange among the group components. Some issues are particularly investigated, such as the realist multirobot environment representation (involving the global mission, the tasks that belong to this mission and the active robots) and a task selection form based on theories and social learning approaches, such as theories of Lev Vygotsky, Jean Piaget and John Watson. Its theories already consolidated to real individuos, allows the cooperative execution efficient by robots. IDeM-MRS can be used for different types of missions, from the simplest to more complex ones. The experiments and results validate the effectiveness of this formalism compared to the traditional empirical model.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-01-10T12:35:43Z No. of bitstreams: 1 CarlosAvelinoDeBarros_TESE.pdf: 14220676 bytes, checksum: 5528aa72761d295e342d61cf12387c5e (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-01-11T12:51:22Z (GMT) No. of bitstreams: 1 CarlosAvelinoDeBarros_TESE.pdf: 14220676 bytes, checksum: 5528aa72761d295e342d61cf12387c5e (MD5) / Made available in DSpace on 2017-01-11T12:51:22Z (GMT). No. of bitstreams: 1 CarlosAvelinoDeBarros_TESE.pdf: 14220676 bytes, checksum: 5528aa72761d295e342d61cf12387c5e (MD5) Previous issue date: 2016-07-13 / O per?odo que durou do surgimento dos microprocessadores at? o in?cio deste s?culo ficou marcado pela expans?o geom?trica da frequ?ncia de opera??o desses dispositivos. Se por um lado isso proporcionou aumentos cont?nuos do desempenho, tamb?m foi respons?vel por um crescimento problem?tico do aquecimento e do consumo de energia. No sentido de atenuar esses problemas, os processadores multi-core passaram a substituir extensivamente os processadores single-core, oferecendo uma alternativa vi?vel para aumentar o desempenho sem o aumento da frequ?ncia. Como uma das formas de se mapear o consumo de energia, apresentamos o desenvolvimento de dois conjuntos de modelos matem?ticos para a representa??o da pot?ncia el?trica dissipada nos processadores. De acordo com considera??es feitas em rela??o a suas parcelas est?tica e din?mica, estabelecemos a pot?ncia total como vari?vel dependente da frequ?ncia de opera??o dos respectivos processadores analisados. Demonstramos, a partir desses modelos matem?ticos, que o consumo relativo de energia dos processadores pode ser associado a medidas de desempenho empregadas em processamento paralelo, como speedup e efici?ncia. Tamb?m utilizamos os modelos para monitorar a influ?ncia de diversos fatores na redu??o do consumo de energia nos processadores multi-core, tais como o percentual da por??o paralela do c?digo, a quantidade de n?cleos a ser empregado de cada vez, a frequ?ncia de trabalho e o pr?prio speedup. Os resultados das an?lises, em simula??es e em hardware, confirmam as previs?es te?ricas e despertam a possibilidade de melhorar o desempenho energ?tico dos processadores multi-core, sobretudo nas condi??es em que os fatores de influ?ncia podem ser flexibilizados. / The period that lasted from the advent of microprocessors until early this century was marked by the geometric expansion of their operating frequency. If on one hand it provided continuous performance increases, on the other hand it was also responsible for a problematic growth in heating and energy consumption. In attempt to mitigate these problems, multi-core processors have been used extensively in replacement for singlecore processors, offering a viable alternative to increase performance without increasing frequency. As a way of mapping energy consumption, we present the development of two sets of mathematical models for the representation of the electrical power dissipated in the processors. According to considerations we made in relation to static and dynamic parts of the power, we established an equation for the total power as a function of the operating frequency of the respective analyzed processors. We demonstrate, based on these mathematical models, that the relative energy consumption of processors can be related to parallel processing performance measures, such as speedup and efficiency. We also use the models to monitor the influence of several factors on the reduction of energy consumption in multi-core processors, such as the percentage of the parallel portion of the code, the number of cores to be used each time, the working frequency and speedup itself. Results of the analyzes confirm the theoretical predictions and alert to the possibility of improving the energy performance of multi-core processors, especially in conditions in which the factors of influence can be made flexible.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-01-27T12:26:53Z No. of bitstreams: 1 FabioAugustoProcopioDePaiva_TESE.pdf: 11863653 bytes, checksum: ea2b87d3ec0832aff7e2d5c1c7eda033 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-01-30T12:32:55Z (GMT) No. of bitstreams: 1 FabioAugustoProcopioDePaiva_TESE.pdf: 11863653 bytes, checksum: ea2b87d3ec0832aff7e2d5c1c7eda033 (MD5) / Made available in DSpace on 2017-01-30T12:32:55Z (GMT). No. of bitstreams: 1 FabioAugustoProcopioDePaiva_TESE.pdf: 11863653 bytes, checksum: ea2b87d3ec0832aff7e2d5c1c7eda033 (MD5) Previous issue date: 2016-07-01 / Em muitos problemas de engenharia, ? comum o estudo de um tipo de processo que se comporta, via de regra, como um sistema din?mico. Esse tipo de sistema possui a peculiaridade de poder ser modelado por meio de um conjunto de equa??es que evolui ao longo do tempo para representar o comportamento modelado do sistema. Para resolver esses problemas de engenharia, diversos m?todos de Computa??o Bio-inspirada v?m sendo propostos como solu??o em diferentes contextos. Entre esses m?todos, est? uma categoria de algoritmos conhecida como Intelig?ncia de Enxames. Apesar do relativo sucesso, a maioria dos m?todos bio-inspirados enfrenta um problema muito comum conhecido como converg?ncia prematura. A converg?ncia prematura ocorre quando um enxame (ou uma popula??o) perde a sua capacidade de gerar diversidade e, como consequ?ncia, converge para uma solu??o sub-?tima, prematuramente. Na literatura, existem diversas abordagens que se prop?em a resolver esse problema. Esta tese prop?e uma nova abordagem que ? baseada em um conceito chamado serendipidade que, normalmente, ? aplicado no dom?nio dos Sistemas de Recomenda??o. Para avaliar a viabilidade da adapta??o desse conceito ao novo contexto, uma variante chamada Serendipity-Based Particle Swarm Optimization (SBPSO) foi implementada e, posteriormente, comparada com a Particle Swarm Optimization (PSO) padr?o e algumas variantes apresentadas na literatura. Para realizar os diversos experimentos computacionais, foram utilizadas 16 fun??es de benchmark bastante comuns. Em todos os experimentos, os resultados da SBPSO se mostraram promissores e apresentaram um bom comportamento de converg?ncia, superando a PSO padr?o e as variantes estudadas no que diz respeito ? qualidade da solu??o, ? capacidade de encontrar o ?timo global, ? estabilidade das solu??es e ? capacidade de reiniciar o movimento do enxame ap?s a estagna??o ter sido detectada. / IN the literature, it is common to find many engineering problems which are used to present the effectiveness of the optimization algorithms. Several methods of Bio-Inspired Computing have been proposed as a solution in different contexts of engineering problems. Among these methods, there is a class of algorithms known as Swarm Intelligence. Despite the relative success, most of these algorithms faces a common problem known as premature convergence. It occurs when a swarm loses its ability to generate diversity and consequently converges to a suboptimal solution prematurely. There are several approaches proposed to solve this problem. This doctoral thesis proposes a new approach based on a concept called serendipity. It is usually applied in the field of Recommender Systems. To validate the feasibility of adapting this concept to the new context, a variant called Serendipity-Based Particle Swarm Optimization (SBPSO) has been implemented considering two dimensions of serendipity: chance and sagacity. To evaluate the presented proposal, two sets of computer experiments were performed. Sixteen reference functions which are common in the evaluation of optimization algorithms were used. In the first set of experiments, four functions were used to compare SBPSO to Particle Swarmoptimization (PSO) and some literature variants. In the second ones, twelve other functions were used, but for high dimensionality and a larger number of evaluations of the objective function. In all experiments, the results of the SBPSO were promising and presented a good convergence behaviour with regard to: a) quality of the solution, b) ability to find the global optimum, c) stability of solutions and d) ability to resume the swarmmovement after stagnation has been detected.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-02-09T22:01:23Z No. of bitstreams: 1 ErnanoArraisJunior_TESE.pdf: 2358354 bytes, checksum: fe5eabcdace20f4bc0d035be4b15e067 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-02-10T18:46:36Z (GMT) No. of bitstreams: 1 ErnanoArraisJunior_TESE.pdf: 2358354 bytes, checksum: fe5eabcdace20f4bc0d035be4b15e067 (MD5) / Made available in DSpace on 2017-02-10T18:46:36Z (GMT). No. of bitstreams: 1 ErnanoArraisJunior_TESE.pdf: 2358354 bytes, checksum: fe5eabcdace20f4bc0d035be4b15e067 (MD5) Previous issue date: 2016-08-26 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Os problemas cardiovasculares est?o entre as principais causas de mortandade no mundo. Estima-se que cerca de 15 % da popula??o mundial vem a ?bito devido a problemas cardiovasculares. No Brasil esse n?mero equivale a quase 30 % dos casos de morte, sendo os homens os mais afetados por doen?as cardiovasculares, apresentando um percentual de aproximadamente 60 % das v?timas. Outro fator alarmante, ? que o Brasil est? entre os 10 pa?ses com maior ?ndice de morte por doen?as cardiovasculares. Os problemas cardiovasculares s?o oriundos do mal funcionamento do cora??o e das art?rias, sendo os mais comuns o infarto, o acidente vascular cerebral (AVC), arritmias card?acas e isquemias. Assim, se faz necess?rio um bom acompanhamento das atividades card?acas, a fim de evitar poss?veis transtornos oriundos de problemas cardiovasculares. Nos ?ltimos anos, diversas solu??es no ?mbito da telecardiologia v?m sendo discutidas para a redu??o destes n?meros, al?m de propor um melhor acompanhamento de indiv?duos (pacientes) e aux?lio ?s unidades b?sicas de sa?de localizadas distantes dos grandes centros. Neste trabalho, ser? apresentado um sistema para an?lise de sinais de eletrocardiograma (ECG) aplicado ? telecardiologia, objetivando a valida??o de dados cl?nicos cardiol?gicos, especificamente arritmias card?acas (bradicardia, taquicardia e contra??o ventricular prematura). A ferramenta matem?tica utilizada para an?lise dos sinais ECG ? a Transformada Wavelet Discreta Redundante (TWDR), sendo implementada uma vers?o para an?lise em tempo-real, e o m?todo utilizado para a aferi??o das caracter?sticas ? o m?todo baseado em thresholds. Ent?o, de posse deste sistema de caracteriza??o do sinal ECG, pode-se validar laudos cl?nicos cardiol?gicos, ou melhor, trata-se de uma ferramenta para aux?lio na valida??o de diagn?sticos m?dicos. Os resultados encontrados foram satisfat?rios, o sistema apresentou Sensibilidade e Preditividade Positiva Superiores a 99 %. Ser? apresentado tamb?m um estudo acerca das ferramentas wavelets que s?o mais indicadas no tratamento de sinais de eletrocardiograma. / Cardiovascular problems are among the leading causes of mortality in the World. It is estimated that about 15 % of the world population has died due to cardiovascular problems. In Brazil this number represents almost 30 % of deaths, being the men the most affected by cardiovascular disease, with a percentage of approximately 60 % of the victims. Another alarming factor is that Brazil is among the 10 countries with the highest rate of death from cardiovascular disease. Cardiovascular diseases arise from malfunction of the heart and arteries, the most common are infarction, stroke, cardiac arrhythmias and ischemia. Thus, if a good monitoring cardiac activity is necessary in order to prevent possible inconvenience arising from cardiovascular disorders. In recent years, several solutions in the framework of Telecardiology have been discussed to reduce these numbers, in addition to proposing a better monitoring of individuals (patients) and aid to basic health care units located far from major centers. In this work, It is proposed a system will for ECG signal analysis applied to Telecardiology, aiming to validate cardiological clinical data, specifically cardiac arrhythmias (bradycardia, tachycardia and premature ventricular contraction). The mathematical tool used for analyzing ECG signals is Redundant Discrete Wavelet Transform (RDWT), implemented a version for real-time analysis, and the method used for measuring the ECG characteristics is the method based on thresholds. Then, with this ECG signal characterization system it can validate cardiological clinical reports, or rather, it is a tool to support of medical diagnostics validation. The results were satisfactory, the system showed Sensitivity and Positive Predictivity above 99 %. It will be presented also a study about mothers wavelet that are more appropriate in ECG signals processing.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-02-13T19:22:38Z No. of bitstreams: 1 LeandroRochinkCosta_DISSERT.pdf: 1175831 bytes, checksum: 3fb21392f141799634d3dbee38317729 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-02-14T18:08:27Z (GMT) No. of bitstreams: 1 LeandroRochinkCosta_DISSERT.pdf: 1175831 bytes, checksum: 3fb21392f141799634d3dbee38317729 (MD5) / Made available in DSpace on 2017-02-14T18:08:27Z (GMT). No. of bitstreams: 1 LeandroRochinkCosta_DISSERT.pdf: 1175831 bytes, checksum: 3fb21392f141799634d3dbee38317729 (MD5) Previous issue date: 2016-08-22 / Ap?s v?rios avan?os na tecnologia de capta??o e armazenamento de dados e do crescimento de aplica??es que prov?m novas informa??es, o n?mero de elementos informacionais dispon?veis ? enorme tanto em volume quanto em variedade. Com esse aumento na quantidade de informa??es, a necessidade de entend?-los e resumi-los se tornou cada vez mais urgente. O Agrupamento Balanceado de Dados, do ingl?s Balanced Clustering, visa encontrar grupos de entidades similares que possuam aproximadamente o mesmo tamanho. Neste trabalho, ? proposta uma nova abordagem heur?stica baseada na metaheur?stica Busca em Vizinhan?a Vari?vel, do ingl?s Variable Neighborhood Search (VNS), e na metodologia Menos ? mais, do ingl?s Less is more approach, para o problema de agrupamento de dados usando o crit?rio da soma m?nima das dist?ncias quadr?ticas com restri??o de balanceamento dos grupos. Os algoritmos encontrados na literatura n?o s?o escal?veis ao passo que aumentamos o tamanho do problema para al?m de 5000 elementos de acordo com experimentos realizados nesta pesquisa. Os experimentos computacionais mostram que o m?todo proposto supera o atual estado da arte neste problema. / After advances in collecting and storing data and the growth in applications that provide new information, the number of data elements available is huge in both volume and variety. With this increase in the quantity of information, the need to understand them and summarize them has become increasingly urgent. The Balanced Clustering seeks to find groups of similar entities that have approximately the same size. In this dissertation, we propose a new heuristic approach based on metaheuristic Variable Neighborhood Search (VNS) and methodology "Less is More Approach"(LIMA) to data clustering problem using the criterion of the minimum sum-of-squared distances applying balancing restriction for the groups. The algorithms found in the literature are not scalable, while the problem of increased size in addition to elements 5000 in accordance with experiments performed in this study. The computational experiments show that the proposed method outperforms the current state of the art for the problem.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-02-17T19:02:33Z No. of bitstreams: 1 AlmirSouzaESilvaNeto_TESE.pdf: 7594512 bytes, checksum: e73e4bac15af98e3446fb9a14895033b (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-02-17T21:29:12Z (GMT) No. of bitstreams: 1 AlmirSouzaESilvaNeto_TESE.pdf: 7594512 bytes, checksum: e73e4bac15af98e3446fb9a14895033b (MD5) / Made available in DSpace on 2017-02-17T21:29:12Z (GMT). No. of bitstreams: 1 AlmirSouzaESilvaNeto_TESE.pdf: 7594512 bytes, checksum: e73e4bac15af98e3446fb9a14895033b (MD5) Previous issue date: 2016-08-22 / Nos dias atuais observa-se um grande avan?o na ?rea aeroespacial, em sistema de telemetria, sensoriamento remoto, sistemas de radar (rastreamento e monitora??o), sistemas de comunica??es via sat?lite e novas tecnologias de comunica??es de voz e dados. As antenas de microfita cada vez mais t?m sido utilizadas devido as suas caracter?sticas e vantagens. Dessa forma, este trabalho apresenta an?lises, simula??es e medi??es de antenas de microfitas para aplica??o em: redes locais sem fio WLAN (Wireless Local Area Network) com opera??o em 2,4 GHz; tecnologia de quarta gera??o 4G para o uso em 2,5 GHz; tecnologia de quinta gera??o 5G nas frequ?ncias de 28 GHz e 60 GHz; aplica??es em UWB (Ultra Wide Band) com bandas de rejei??o utilizando ressoadores de anel partido; sat?lites com opera??o na banda Ku e aplica??o em telemetria utilizando estruturas cil?ndricas operando na faixa de 2 a 4 GHz, na banda S. Foram feitas an?lises com aplica??o de estrutura EBG (Electromagnetic Band Gap) no substrato e no plano de terra, utiliza??o de substrato metamaterial, aplica??o de estruturas DGS (Defected Ground Strutures) no plano de terra e arranjos, com objetivo de obter melhoria nos par?metros, em especial ganho e largura de banda. O m?todo de an?lise das antenas de microfita utilizado neste trabalho foi o m?todo de Linha de Transmiss?o Transversa. Os resultados simulados foram obtidos atrav?s do software comercial Ansoft HFSS. Compara??es entre os resultados simulados e medidos das antenas propostas foram realizados para efeito de valida??o dos prot?tipos. Ao final, s?o apresentadas sugest?es para a continuidade deste trabalho. / Nowadays there has been a major breakthrough in aerospace, in telemetry system, remote sensing, radar systems (tracking and monitoring), satellite communications systems and new technologies for voice and data communications. The microstrip antennas have increasingly been used due to their characteristics and advantages. Thus, this work presents analysis, simulations and measurements of microstrip antenna for use in: wireless local area networks WLAN (Wireless Local Area Network) with operation at 2.4 GHz; fourth generation 4G technology for use in 2.5 GHz; fifth-generation technology 5G at frequencies of 28 GHz and 60 GHz; applications in UWB (Ultra Wide Band) with rejection bands using resonators party ring; satellites operating in the Ku band and application in telemetry using cylindrical structures operating at 2 to 4 GHz band, the S band. Analysis were made with application of EBG structure (Electromagnetic Band Gap) on substrate and in the ground plane, using substrate metamaterial, application DGS structures (Defected Ground Structures) in the ground plane and arrangements, in order to achieve improvement in the parameters, in particular gain and bandwidth. The method of analysis of microstrip antennas used in this work was the Transverse Transmission Line method. The simulated results were obtained by Ansoft HFSS commercial software. Comparisons between simulated and measured results of the antennas proposals were made for effect of validation of the prototypes. Suggestions are made for the continuity of this work.