Este trabalho aborda o problema de programação de tarefas, a partir de um caso específico, conhecido como Flow Shop com buffer zero. O problema consiste em programar n tarefas em m máquinas no ambiente Flow Shop permutacional. Com o aumento do nível de exigência dos clientes, pesquisas que buscam o atendimento das datas de entrega têm se tornado de extrema importância em ambientes de manufatura. Este trabalho analisa o problema de minimização do atraso total no ambiente Flow Shop onde não existe a possibilidade de armazenagem das tarefas entre estágios de produção sucessivos (buffer zero), tendo como consequência o bloqueio de máquinas. A Heurística Evolutiva Clustering Search foi proposta e analisada para a obtenção de soluções de altíssima qualidade para o problema. Finalmente, uma extensa experimentação computacional foi realizada. Quando comparado com o melhor método reportado na literatura, o método proposto apresentou qualidade superior. / This work deals with the Flow Shop scheduling problem. The objective is scheduling n jobs on m machines in the Permutation Flow Shop environment. With the increasing customer demand level, researches that aims the attendance of due dates have become extremely important in manufacturing process. This work studies the total tardiness minimization problem in the flow shop environment where there is no buffer storage between machines, resulting in the machine block. The Heuristic Evolutionary Clustering Search was proposed and analyzed to obtain high quality solutions to the problem. Finally, an extensive computational experiment was performed. When compared to the best method reported in the literature, the proposed method showed high quality.

As profundas mudanças trazidas pela sociedade da informação, em especial o advento da Internet, tiveram enorme impacto sobre as interações humanas, modificando a forma como as pessoas se relacionam e consomem bens e serviços. Nesse contexto, surgem inúmeros serviços prestados por empresas baseadas na rede mundial de computadores. Características destes novos mercados como o uso de plataformas de múltiplos lados, o uso intensivo de novas tecnologias, a presença de efeitos ou externalidades de rede, a interligação entre serviços distintos, o oferecimento de serviços de forma gratuita ao consumidor e o entrelaçamento entre os diversos serviços prestados, desafiam conceitos tradicionais do direito concorrencial como mercado relevante, poder de mercado e venda casada. Faz-se necessária, assim, a adaptação da metodologia de análise antitruste, por meio da analise dos fundamentos teóricos que dão suporte à sua aplicação, considerando-se as particularidades presentes nesses mercados. O presente estudo tem por objetivo analisar o controle de condutas nesses novos setores de Internet por meio da análise das particularidades econômicas desses novos setores e as consequências desse enfoque sobre a análise antitruste. / The deep changes brought by the information society, especially the rising of the Internet, caused an enormous impact over human interactions, changing the way people relate and the way people consume goods and services. As a consequence of this new reality, services provided by web based companies emerged. Some characteristics of those new markets, such as the use of multiple side platforms, the intensive use of new technologies, the existence of network effects or network externalities, the connection of distinct services, the offer of zero price services and the deep connection between the services, challenge traditional concepts of antitrust law, like relevant market, market power and tying. Therefore, traditional antitrust analysis and its theoretical foundations must be reviewed, considering the particularities of those markets. The main objective of this study is to analyze the conduct control on these new Internet sectors, considering its economic particularities and the consequences of these view on antitrust analysis.

Semicontinuous data consist of a combination of a point-mass at zero and a positive skewed distribution. This type of non-negative data distribution is found in data from many fields, but presents unique challenges for analysis. Specifically, these data cannot be analyzed using positive distributions, but distributions that are unbounded are also likely a poor fit. Two-part models incorporate both the zero values from semicontinuous data and the positive continuous values. In this dissertation, we compare zero-inflated gamma (ZIG) and zero-inflated log-normal (ZILN) two-part models. For both of these models, the probability that an outcome is non-zero is modeled via logistic regression. Then the distribution of the non-zero outcomes is modeled via gamma regression with a log-link for ZIG regression and via log-normal regression for ZILN. In this dissertation we propose tests which combine the two parts of the ZIG and ZILN models in meaningful ways for performing a two group comparison. Then we compare these tests in terms of observed Type 1 error rates and power levels under both correctly specified and misspecified ZIG and ZILN models. Tests falling under two main hypotheses are examined. First, we look at two-part tests which come from a two-part hypothesis of no difference between the two groups in terms of the probability of non-zero values and in terms of the the mean of the non-zero values. The second type of tests are mean-based tests. These combine the two parts of the model in ways related to the overall group means of the semicontinuous variable. When not adjusting for covariates, two tests are developed based on a difference of means (DM) and a ratio of means (RM). When adjusting for covariates, tests using mean-based hypotheses are developed which marginalize over the values of the adjusting covariates. Under the adjusting framework, two ratio of means statistics are proposed and examined, an average of the subject specific ratio of means (RMSS) and a ratio of the marginal group means (RMMAR). Simulations are used to compare Type 1 error and power for these tests and standard two group comparison tests. Simulation results show that when ZIG and ZILN models are misspecified and the coefficient of variation (CoV) and/or sample size is large, there are differences in Type 1 error and power results between the misspecified and correctly specified models. Specifically, when ZILN data with high CoV or sample size are analyzed as ZIG, Type 1 error rates are prohibitively high. On the other hand, when ZIG data are analyzed as ZILN under these scenarios, power levels are much lower for ZILN analyses than for ZIG analyses. Examination of Q-Q plots show, however, that in these settings, distinguishing between ZIG and ZILN data can be relatively straightforward. When the coefficient of variation is small it is harder to distinguish between ZIG and ZILN models, but the differences between Type 1 error rates and power levels for misspecified or correctly specified models is also slight. Finally, we use the proposed methods to analyze a data set involving Parkinson's disease (PD) and driving. A number of these methods show that PD subjects exhibit poorer lane keeping ability than control subjects.

This thesis proposes a high efficiency driving circuit for multiple light emitting diode (LED) lamps with dimming feature. The driving circuit consists of essentially a high-frequency half-bridge series resonant inverter with multiple output transformers, on which primary windings are connected in series, while secondary sides are loaded by LED lamps rated at different powers with different turn ratios. By controlling the frequency of the inverter, the resonant current as well as the lamp current can be regulated simultaneously. On the other hand, the LED lamps can be dimmed individually by the associated dimming switches with integral cycle control. The tactful circuit ensures a high circuit efficiency owing to less conducting losses and zero-voltage switching (ZVS) operation of the active power switches of the inverter and zero current switching (ZCS) operation of the dimming switches. Two prototype circuits designed for 60 W three RGB LED lamps and 50 W five white light LED lamps have been built and tested to verify the analytical predictions. Experimental results demonstrate that the driving circuit can operate the LED lamps at a high efficiency with a wide dimming range. The lamp power can be dimmed to 10% with frequency control, while whole dimming range can be achieved with integral cycle control. The circuit efficiency with integral cycle control is relatively higher than that with frequency control. The measured efficiencies for the two designed circuit are 93% and 90%, respectively, under the rated powers.

A high-frequency half-bridge series resonant inverter with multiple output transformers is developed for driving multiple cold-cathode fluorescent lamps (CCFLs) with dimming feature. The primary sides of the transformers are connected in series with the resonant inverter to have an identical current, while the secondary sides are loaded by CCFLs with galvanic isolation to each other. To ensure a high circuit efficiency, the active power switches of the inverter are designed to be switched on at zero voltage. The resonant current of the inverter can be regulated by controlling the switching frequency of the inverter, so that all CCFLs can be dimmed simultaneously. On the other hand, the primary sides of the output transformers are associated with parallel switches to dim the CCFLs individually. These dimming switches are operated at a low frequency by integral cycle control with zero current switching (ZCS) to reduce the switching losses. The resonant circuit is tactfully designed to alleviate the variation of the resonant current caused by the switching of dimming switches. A laboratory circuit is built for driving 5 CCFLs. The intended circuit performances are confirmed by test results. The variation of the resonant current is less than 10% when the dimming switches are switching, and the measured efficiency for the circuit is 96.15% under the rated powers.

In the thesis, we apply the state average method to model the time-average linear dynamic equation, which is used to design a gain scheduled linear quadratic optimal controller. Because the standard modulation method of the twin-buck converter is PFM(Pulse-Frequency Modulation) and twin-buck converter owns the soft-switching characteristic, the voltage step-down ratio, that is, control force can not be lowered less than 0.5. For expanding the range of control force of converter, we modulate the converter by means of mixed modulation of PWM/PFM. With the former odulation method, we have to calculate the discharging time of synchronous switch taken by controller to achieve zero-voltage-transition (ZVT). In the last part of this thesis, we verify the practicability of the controller and modulation method through soft simulation coded by MATLAB and hardware implementation of FPGA driven by Verilog.

A pesquisa tem como objetivo geral compreender as reconfigurações ocorridas no jornal em rela-ção à mobilidade, considerando as características do jornal nas múltiplas plataformas e as dimen-sões de mobilidade apreendidas desse produto no papel, no computador, no notebook, no celular, no kindle, no smartphone, no tablet e no relógio inteligente. Seus objetivos específicos são: (1) discutir as reconfigurações do jornalismo no cenário de convergência jornalística; (2) identificar as caracte-rísticas do jornal por meio da caracterização histórica desse produto nas múltiplas plataformas ana-lisadas; (3) mapear as dimensões de mobilidade que podem ser apreendidas a partir das caracterís-ticas identificadas dos jornais nas múltiplas plataformas analisadas; (4) refletir de que maneira as características identificadas no jornal nas múltiplas plataformas e as dimensões de mobilidade ma-peadas podem ser relacionadas às reconfigurações do jornalismo no contexto da convergência. O estudo é de abordagem qualitativa e os procedimentos metodológicos abrangem a pesquisa biblio-gráfica e a pesquisa documental. Adota-se o jornal Zero Hora como objeto empírico de caráter exemplar de modo a tensionar o que é debatido com base no quadro teórico construído. Tomando o jornal como dispositivo, avalia-se o jornal impresso, o ciberjornal e o jornal multiplataforma em relação às esferas da convergência jornalística (editorial, empresarial, profissional, público, tecnológica), tendo em vista especificidades dos suportes (constituição, configuração, aparência) e das plataformas (periodicidade, estrutura, camadas, superfície, recursos modais). Com base no que avaliou-se, foram propos-tas nove dimensões de mobilidade do dispositivo jornal: portabilidade, conexão, expansão, sensibilidade ao contexto, maleabilidade, atualização, customização, multimodalidade e ubiquidade. / This research aims to understand the reconfigurations of the newspaper related to mobility, con-sidering its characteristics on multiple platforms and the aspects of mobility perceived on this prod-uct on paper, desktop, notebook, mobile phone, kindle, smartphone, tablet and smart watch. Its specific objectives are: (1) to discuss the journalism reconfigurations on a journalistic convergence scenario; (2) to identify the newspaper characteristics through the historical characterization of this product on the analyzed multiple platforms; (3) to map the aspects of mobility which can be per-ceived through the identified characteristics of the newspapers on the analyzed multiple platforms; (4) to reflect on which way those characteristics of the newspapers identified on multiple platforms and the mapped mobility aspects can be related to the journalism reconfigurations on the context of convergence. The study has a qualitative approach and the methodological procedures involved bibliographical and documental research. We’ve adopted the Zero Hora newspaper as empirical ob-ject of exemplary character, so it was possible to tension what was discussed with the theoretical framework constructed. By taking the newspaper as a device, we’ve evaluated press, cyber and multi-platform papers in relation to the journalistic convergence sphere (corporative, professional, pub-lic, editorial, technological); considering the form specificities (constitution, configuration, appearance); and the platforms (periodicity, structure, layers, surface, modal resources). Summarizing our evaluation, nine aspects of mobility on the newspaper device were proposed: portability, connection, expansion, context sensitivity, flexibility, actualization, customization, multi-modality and ubiquity.

Made available in DSpace on 2014-06-11T19:22:33Z (GMT). No. of bitstreams: 0 Previous issue date: 2011-02-18Bitstream added on 2014-06-13T20:08:35Z : No. of bitstreams: 1 freitas_scl_me_ilha.pdf: 1038067 bytes, checksum: de418f750a6f2441df99083abd72c137 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O acelerado desenvolvimento da eletrônica de potência vem desencadeando uma série de transformações no sistema elétrico, sendo possível destacar a constante alteração da natureza das cargas consumidoras, a proliferação da co-geração e o peso crescente de questões ambientais relacionadas à questão da geração. Grande parte das cargas atuais é composta por dispositivos não-lineares que, por muitas vezes, são a causa de problemas relacionados à qualidade da energia elétrica. Considerando a variedade da distribuição sequencial das harmônicas de corrente na utilização dos filtros passivos, destacam-se os filtros e bloqueadores eletromagnéticos, os quais têm merecido especial atenção devido à sua robustez e baixo custo de implantação. Este trabalho está particularmente direcionado à investigações relacionadas ao uso desses dispositivos que possibilitam uma atenuação do fluxo das principais componentes harmônicas que compõe as distorções harmônicas de sequência zero. Neste contexto, esta dissertação apresenta contribuições inéditas relacionadas com o desenvolvimento de modelos matemáticos no domínio da frequência para bloqueadores eletromagnéticos, e um estudo de modelos matemáticos para filtros eletromagnéticos, compondo então, o aqui denominado supressor eletromagnético de componentes de sequência zero. Apresenta-se ainda, a utilização de metodologias para análise de desempenho baseado no comportamento das componentes harmônicas sequenciais. É estabelecida uma base comparativa de natureza experimental que possibilita a avaliação do desempenho e da aderência do modelo proposto. São utilizados protótipos de baixa potência de um filtro e um bloqueador, ambos eletromagnéticos, construídos a partir de análises teóricas. Os modelos desenvolvidos são utilizados na composição de um aplicativo computacional para análise... / The accelerated development of power electronics has promoted a series of changes in the electrical system, so it is possible to highlight the constant changing of consumer loads, the proliferation of co-generation and the growing importance of environmental issues related to generation. Much of the current loads are composed of non-linear devices which, in many cases are the cause of problems related to power quality. Considering the sequential distribution variety of harmonic currents in the use of passive filters, highlight the electromagnetic filters and blockers, which have received special attention due to its robustness and low cost of deployment. This work is particularly directed to investigations related to the use of these devices which enable an attenuation of the flow of the principal harmonic components that compound the zero-sequence harmonic distortion. In this context, this work presents unedited contributions related to the development of mathematical models in the frequency domain for electromagnetic blocking, and a study of mathematical models of electromagnetic filters, making then, the here called electromagnetic zero-sequence components suppressor. It presents also, the use of methodologies for performance analysis based on the sequential behavior of harmonic components. It is established a comparison basis of experimental nature that enables the performance and adherence analysis of the model. Are used a low-power prototypes of a filter and a blocker, both electromagnetic, constructed from theoretical analysis. These models are used in the composition of a software for performance analysis and optimal project of harmonic filtering systems. This tool allows an individualized and systematic investigation of the electrical system behavior for distinct harmonic sequence components. Thus, through a detailed investigation it is possible to identify appropriated actions... (Complete abstract click electronic access below)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The present thesis approaches the practice of public journalism (PJ) by the press media. The media context in the South of Brazil is called the RBS Phenomenon by Guareschi and Ramos (1988), in which the Zero Hora Newspaper configures a business capitalist model, becoming a strong competitor in the gauchos* media market. In addition to this, according to Faccin (2009) the Rede Brasil Sul (RBS) today is the biggest media network in the South of Brazil, which places it not only as the biggest owner of communication vehicles as a spokesperson of this society. Having this vision of peculiar context we embraced the Zero Hora Newspaper as our empirical object. From state of the art researches we realized that the current of public journalism falls back on a vast number of terms that sometimes are used as synonyms, sometimes used with subtle differences or even with a great variety of applications. Haas (2006) in his studies of worldwide mapping of public journalism elucidates the need of study development that dedicates to deeply investigate the features and peculiarities in different geographic contexts. This way, the problem question which guides this thesis is: How does the public journalism is revealed in journalistic practices at Zero Hora? Accordingly, our general aim is to study the manifestations of public journalism on Zero Hora, and more specifically to comprehend the dynamic of these current journalistic practices on ZH; identify the understanding of journalists in the newsroom as well as the management of this vehicle upon the PJ and confront them with report analysis from news editorial. This thesis is theoretically structured with Rosen (1996), Glaser (1999), Traquina (1999; 2003), Silva (2002; 2006) and Nip (2006). Secondly we treated the media organizations and the journalistic production as of studies by Rodrigues (1990), Esteves (1998), Traquina (1999; 2005), MacQuail (2012; 2013) and McCombs (2009). As a research strategy we adopted the case study (YIN, 2005) and we used different techniques to collect data as well as the document analysis, structured and semi-structured interviews, non-participant systematic observation (MARCONI AND LAKATOS, 2003) and analysis of reports from script elaborated by the researcher. Overall we identified that the journalistic campaign coverage of Fundação Maurício Sirotsky Sobrinho, besides the journalists profiles related directly to the news production, the subject coverage (local and state regional) and the main news values perceived characterize as ways of manifestation of PJ on ZH. This scenery shows that the vehicle has a manifestation potential of this practice. However, ZH stands some organizational gates to this daily journalistic routine making its product oscillate in terms of public journalism which leads us to say that sometimes it is covered and sometimes not. / A presente tese trata sobre a prática do jornalismo público pela mídia impressa. O contexto midiático do Sul do Brasil é chamado por Guareschi e Ramos (1988) de fenômeno RBS , onde o jornal Zero Hora se configura como um modelo capitalista de negócio, tornando-se um forte concorrente no mercado gaúcho de mídia. Agregado a isso, segundo Faccin (2009) a Rede Brasil Sul (RBS), responsável pela publicação, é, hoje, a maior rede de mídia no Sul do Brasil, o que a posiciona tanto como detentora do maior número de veículos de comunicação quanto como uma porta-voz dessa sociedade. Tendo em vista tal contexto peculiar, adotamos o jornal Zero Hora, do Rio Grande do Sul, como nosso objeto empírico. A partir de pesquisas de estado da arte, percebemos que a corrente do jornalismo público recorre em uma diversidade de termos que ora são utilizados como sinônimos, ora com sutis diferenças, ou, ainda, com uma variedade de aplicações. Haas (2006), em seu estudo de mapeamento mundial do jornalismo público, elucida a necessidade do desenvolvimento de estudos que se dediquem a investigar aprofundadamente suas características e peculiaridades em diferentes contextos geográficos. Dessa maneira, a questão-problema que norteia esta tese é: como o jornalismo público se manifesta nas práticas jornalísticas de Zero Hora? Nesse sentido, nosso intuito geral é estudar as manifestações de jornalismo público em Zero Hora e, mais especificamente, compreender a dinâmica das práticas jornalísticas correntes no jornal e identificar o entendimento sobre o jornalismo público por parte dos jornalistas da redação, assim como da gestão do veículo, e confrontá-las com uma análise das reportagens da editoria de Notícias. A tese está estruturada teoricamente a partir de Rosen (1996), Glaser (1999), Traquina (1999; 2003), Silva (2002; 2006) e Nip (2006). Em segundo momento, tratamos sobre as organizações midiáticas e a produção jornalística a partir dos estudos de Rodrigues (1990), Esteves (1998), Traquina (1999, 2005), McQuail (2012, 2013) e McCombs (2009). Como estratégia de pesquisa, adotamos o estudo de caso (YIN, 2005) e utilizamos diferentes técnicas de coletas de dados, como análise documental, entrevistas estruturadas e semiestruturadas, observação sistemática não participante (MARCONI; LAKATOS, 2003) e análise das reportagens a partir de roteiro elaborado pelas pesquisadoras. De forma geral, identificamos que a cobertura jornalística das campanhas da Fundação Maurício Sirotsky Sobrinho, assim como o perfil dos jornalistas relacionados diretamente com a produção da notícia, a abrangência das matérias (local e estadual) e os principais valores-notícia percebidos se caracterizam como formas de manifestação do jornalismo público em Zero Hora. Esse cenário mostra que o veículo tem um potencial de manifestação dessa prática. No entanto, o jornal impõe gates organizacionais à rotina jornalística diária, tornando seu produto oscilante, em termos de jornalismo público, o que nos leva a dizer que ele está ora coberto, ora descoberto.

Submitted by RICARDO FONSECA BUZO null (ricardo.buzo@yahoo.com.br) on 2016-06-23T18:54:42Z No. of bitstreams: 1 Dissertação_final_100%pronta.pdf: 4244820 bytes, checksum: 83a976e2284de9c0a3bcbcd8556da567 (MD5) / Approved for entry into archive by Juliano Benedito Ferreira (julianoferreira@reitoria.unesp.br) on 2016-06-27T18:32:12Z (GMT) No. of bitstreams: 1 buzo_rf_me_ilha.pdf: 4244820 bytes, checksum: 83a976e2284de9c0a3bcbcd8556da567 (MD5) / Made available in DSpace on 2016-06-27T18:32:12Z (GMT). No. of bitstreams: 1 buzo_rf_me_ilha.pdf: 4244820 bytes, checksum: 83a976e2284de9c0a3bcbcd8556da567 (MD5) Previous issue date: 2016-05-10 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Com o aumento das cargas elétricas não lineares nas redes de distribuição, intensifica-se o nível de correntes harmônicas responsáveis por distorções nos sinais elétricos, o que compromete a qualidade da energia elétrica. O emprego de dispositivos eletromagnéticos constitui atualmente uma alternativa promissora para mitigação de correntes harmônicas de sequência zero. São dispositivos robustos que, quando utilizados isoladamente ou em conjunto com outros arranjos, podem ser técnica e economicamente atraentes. O filtro eletromagnético é um dispositivo inserido paralelamente ao sistema com baixa impedância de sequência zero e elevada impedância de sequência positiva e negativa. Logo, para um filtro ideal, tem-se o confinamento das correntes harmônicas “triplens” sem que o fluxo de potência do sistema seja comprometido. Buscando-se aperfeiçoar o divisor de corrente de sequência zero entre o sistema e o filtro, o bloqueador eletromagnético é inserido em série ao sistema, devido a sua elevada impedância de sequência zero e baixa impedância para as sequências positiva e negativa. Este trabalho, por meio da teoria das transmitâncias, desenvolve uma metodologia de auxílio no dimensionamento e projeto do filtro e bloqueador eletromagnéticos, em função do percentual de filtragem desejado para a corrente de sequência zero. Para isto, são apresentados os equacionamentos das resistências e reatâncias sequenciais do filtro e bloqueador. Inicialmente, o dimensionamento e projeto do filtro são elaborados sem a presença do bloqueador, inserido apenas quando os resultados alcançados não forem satisfatórios. Em síntese, o desempenho do sistema de filtragem dimensionado e projetado é analisado através do próprio método proposto e do PSIM® , programa bastante difundido e consagrado para o desenvolvimento de simulações que envolvem sistemas de potência. Deste modo, é apresentado, consequentemente, um diagnóstico de aderência para o modelo proposto. / With the increase of non-linear electrical loads in the distribution networks, intensifies the level of harmonic currents responsible for the distortions in electrical signals, compromising the quality of electricity. The use of electromagnetic devices is currently a promising alternative to mitigation of harmonic currents of zero sequence. They are robust devices that when used alone or in conjunction with other arrangements can be technically and economically attractive. The electromagnetic filter is a device inserted in parallel to the system with low zero sequence impedance and high positive and negative sequence impedance. Thus, for an ideal filter, there is the confinement of “Triplens” harmonic currents without the power flow is compromised. Seeking to improve the zero sequence current divider between the system and the filter, the electromagnetic blocker is inserted in series to the system because of their high zero sequence impedance and low impedance for the positive sequence and negative sequence. This work, using the method of transmittances, develops an aid methodology to measure and design the electromagnetics filter and blocker, depending on the percentage of desired filtering for zero sequence current. For this, the sequential resistance equation and sequential reactance equation are presented to the filter and blocker. Initially, the measure and design filter are made without the presence of the blocker, inserted only when the results achieved are not satisfactory. In short, the filtering system performance measured and designed is analyzed using the proposed method and the PSIM®, widespread and dedicated program for the development of simulations involving electrical circuits. Thus, it is shown, therefore, a diagnosis of tack for the proposed model.