O cenário mundial se configura integrado, dinâmico, com alto desenvolvimento tecnológico e capacidade produtiva. Milhões de pessoas estão ingressado no mercado de consumo e os recursos naturais vêm se esgotando simultaneamente ao aumento dos resíduos sólidos urbanos, comprometendo a sustentabilidade do planeta. Neste contexto complexo, os desafios que as empresas enfrentam para se manterem competitivas são inúmeros. O modelo metaprojetual que consolida o design como estratégia competitiva e propõe a construção de plataformas de conhecimentos que dêem suporte às tomadas de decisão de projeto é um dos caminhos para este enfrentamento e foi adotado na pesquisa. Foi realizado um Estudo de Caso para confrontar o modelo teórico do esquema sistêmico de desenvolvimento do processo metaprojetual, com o modelo praticado por uma indústria. Com os dados coletados foi possível fazer uma análise comparativa entre os dois modelos e identificar os pontos fortes e fracos de cada um. O estudo permitiu indicar temas a serem trabalhados na plataforma de conhecimentos da empresa, no sentido de gerar inputs para a construção de cenários e soluções de projeto inovadoras. Também foi possível propor novas diretrizes para compor o modelo teórico adotado e que poderão ser úteis para outras organizações. / The world scenario is configured integrated, dynamic, with both, high technological development and productive capability. While millions of people are entering into the consumer market, the natural resources are running out simultaneously with the rise of municipal solid waste, affecting the sustainability of the planet. In this complex context, the challenges faced by companies in order to remain competitive are innumerous. The metaprojectual model that consolidates the design as a competitive strategy and proposes the construction of knowledge platforms to support the decision-making in the projectual activity is one of the ways to deal with, and it was adopted in this research. A case study was conducted to confront the theoretical model of the systemic scheme of metaprojectual development process, with the model practiced by an industry. With the research data it was possible to do a comparative analysis between the two models and identify the strengths and weaknesses of each one of them. The study enabled to indicate subjects to be included in the company's knowledge platform in order to generate inputs for the construction of scenarios and innovative design solutions. It was also possible to propose new guidelines to be part of the theoretical model that may be useful to other organizations.

Offshore floating wind turbine technology is growing rapidly and has the potential to become one of the main sources of affordable renewable energy. However, this technology is still immature owing in part to complications from the integrated design of wind turbines and floating platforms, aero-hydro-servo-elastic responses, grid integrations, and offshore wind resource assessments. This research focuses on developing methodologies to investigate the technical and economic feasibility of a wide range of floating offshore wind turbine support structures. To achieve this goal, interdisciplinary interactions among hydrodynamics, aerodynamics, structure and control subject to constraints on stresses/loads, displacements/rotations, and costs need to be considered. Therefore, a multidisciplinary design optimization approach for minimum levelized cost of energy executed using parameterization schemes for floating support structures as well as a frequency domain dynamic model for the entire coupled system. This approach was based on a tractable framework and models (i.e. not too computationally expensive) to explore the design space, but retaining required fidelity/accuracy. In this dissertation, a new frequency domain approach for a coupled wind turbine, floating platform, and mooring system was developed using a unique combination of the validated numerical tools FAST and WAMIT. Irregular wave and turbulent wind loads were incorporated using wave and wind power spectral densities, JONSWAP and Kaimal. The system submodels are coupled to yield a simple frequency domain model of the system with a flexible moored support structure. Although the model framework has the capability of incorporating tower and blade structural DOF, these components were considered as rigid bodies for further simplicity here. A collective blade pitch controller was also defined for the frequency domain dynamic model to increase the platform restoring moments. To validate the proposed framework, predicted wind turbine, floating platform and mooring system responses to the turbulent wind and irregular wave loads were compared with the FAST time domain model. By incorporating the design parameterization scheme and the frequency domain modeling the overall system responses of tension leg platforms, spar buoy platforms, and semisubmersibles to combined turbulent wind and irregular wave loads were determined. To calculate the system costs, a set of cost scaling tools for an offshore wind turbine was used to estimate the levelized cost of energy. Evaluation and comparison of different classes of floating platforms was performed using a Kriging-Bat optimization method to find the minimum levelized cost of energy of a 5 MW NREL offshore wind turbine across standard operational environmental conditions. To show the potential of the method, three baseline platforms including the OC3-Hywind spar buoy, the MIT/NREL TLP, and the OC4-DeepCwind semisubmersible were compared with the results of design optimization. Results for the tension leg and spar buoy case studies showed 5.2% and 3.1% decrease in the levelized cost of energy of the optimal design candidates in comparison to the MIT/NREL TLP and the OC3-Hywind respectively. Optimization results for the semisubmersible case study indicated that the levelized cost of energy decreased by 1.5% for the optimal design in comparison to the OC4-DeepCwind. / Graduate

Esta tese tem como objetivo compreender as práticas relacionadas ao consumo de produtos audiovisuais sob demanda em plataformas digitais através da investigação das práticas relacionadas à Netflix na rotina dos seus usuários. O referencial teórico toma como base a Teoria da Prática, na qual a prática é considerada um comportamento rotinizado, com vários elementos interconectados, em uma relação constante entre agentes e objetos. O estudo empírico acontece a partir de entrevistas semiestruturadas e observação dos espaços de consumo — os respondentes foram selecionados por meio de um questionário prévio compartilhado em sites de redes sociais. A investigação acontece com base em cinco eixos: materiais, competências, dinâmicas afetivas, relacionais e espaço-temporais. Em termos gerais, conclui-se que o consumo de conteúdo na Netflix e as práticas relacionadas adquiriram ao longo do tempo um caráter social e recursivo, e assumem também uma dimensão afetiva no cotidiano dos usuários. Nesse sentido, nota-se também o estabelecimento e a reprodução de fluxos de consumo interconectados, nos quais usuários e empresa relacionam-se continuamente: de um lado, há a disponibilização contínua de conteúdo, e do outro, o acesso rotinizado, fragmentado e marcado pela insaciabilidade e autonomia do tempo dedicado à prática, o que favorece a manutenção da estrutura. / The aim of this study is to understand consumption habits of on-demand audiovisual products available on digital platforms by investigating how Netflix is incorporated into the routines of its subscribers. The theoretical reference is based on the practice theory, where the practice is a routine behavior with many interconnected elements of a constant relationship between agents and objects. The empirical research is comprised of semi-structured interviews and by observing spaces of consumption – the respondents were selected from a survey made available on social network sites. The research is based on five axes: materials, skills, affective dynamics, relational and space-time. Overall, it is concluded that content consumption in Netflix and related practices acquired a social and recursive character over time, assuming an affective dimension. In this respect, users and companies are constantly relating with one another in a flowing exchange of interconnected consumption. On one hand, there is constant access to content; on the other, there is routine access which can be fragmented and determined by one’s insatiableness and how much time is spent on it, a key to maintaining its structure.

Esta tese tem como objetivo compreender as práticas relacionadas ao consumo de produtos audiovisuais sob demanda em plataformas digitais através da investigação das práticas relacionadas à Netflix na rotina dos seus usuários. O referencial teórico toma como base a Teoria da Prática, na qual a prática é considerada um comportamento rotinizado, com vários elementos interconectados, em uma relação constante entre agentes e objetos. O estudo empírico acontece a partir de entrevistas semiestruturadas e observação dos espaços de consumo — os respondentes foram selecionados por meio de um questionário prévio compartilhado em sites de redes sociais. A investigação acontece com base em cinco eixos: materiais, competências, dinâmicas afetivas, relacionais e espaço-temporais. Em termos gerais, conclui-se que o consumo de conteúdo na Netflix e as práticas relacionadas adquiriram ao longo do tempo um caráter social e recursivo, e assumem também uma dimensão afetiva no cotidiano dos usuários. Nesse sentido, nota-se também o estabelecimento e a reprodução de fluxos de consumo interconectados, nos quais usuários e empresa relacionam-se continuamente: de um lado, há a disponibilização contínua de conteúdo, e do outro, o acesso rotinizado, fragmentado e marcado pela insaciabilidade e autonomia do tempo dedicado à prática, o que favorece a manutenção da estrutura. / The aim of this study is to understand consumption habits of on-demand audiovisual products available on digital platforms by investigating how Netflix is incorporated into the routines of its subscribers. The theoretical reference is based on the practice theory, where the practice is a routine behavior with many interconnected elements of a constant relationship between agents and objects. The empirical research is comprised of semi-structured interviews and by observing spaces of consumption – the respondents were selected from a survey made available on social network sites. The research is based on five axes: materials, skills, affective dynamics, relational and space-time. Overall, it is concluded that content consumption in Netflix and related practices acquired a social and recursive character over time, assuming an affective dimension. In this respect, users and companies are constantly relating with one another in a flowing exchange of interconnected consumption. On one hand, there is constant access to content; on the other, there is routine access which can be fragmented and determined by one’s insatiableness and how much time is spent on it, a key to maintaining its structure.

O cenário mundial se configura integrado, dinâmico, com alto desenvolvimento tecnológico e capacidade produtiva. Milhões de pessoas estão ingressado no mercado de consumo e os recursos naturais vêm se esgotando simultaneamente ao aumento dos resíduos sólidos urbanos, comprometendo a sustentabilidade do planeta. Neste contexto complexo, os desafios que as empresas enfrentam para se manterem competitivas são inúmeros. O modelo metaprojetual que consolida o design como estratégia competitiva e propõe a construção de plataformas de conhecimentos que dêem suporte às tomadas de decisão de projeto é um dos caminhos para este enfrentamento e foi adotado na pesquisa. Foi realizado um Estudo de Caso para confrontar o modelo teórico do esquema sistêmico de desenvolvimento do processo metaprojetual, com o modelo praticado por uma indústria. Com os dados coletados foi possível fazer uma análise comparativa entre os dois modelos e identificar os pontos fortes e fracos de cada um. O estudo permitiu indicar temas a serem trabalhados na plataforma de conhecimentos da empresa, no sentido de gerar inputs para a construção de cenários e soluções de projeto inovadoras. Também foi possível propor novas diretrizes para compor o modelo teórico adotado e que poderão ser úteis para outras organizações. / The world scenario is configured integrated, dynamic, with both, high technological development and productive capability. While millions of people are entering into the consumer market, the natural resources are running out simultaneously with the rise of municipal solid waste, affecting the sustainability of the planet. In this complex context, the challenges faced by companies in order to remain competitive are innumerous. The metaprojectual model that consolidates the design as a competitive strategy and proposes the construction of knowledge platforms to support the decision-making in the projectual activity is one of the ways to deal with, and it was adopted in this research. A case study was conducted to confront the theoretical model of the systemic scheme of metaprojectual development process, with the model practiced by an industry. With the research data it was possible to do a comparative analysis between the two models and identify the strengths and weaknesses of each one of them. The study enabled to indicate subjects to be included in the company's knowledge platform in order to generate inputs for the construction of scenarios and innovative design solutions. It was also possible to propose new guidelines to be part of the theoretical model that may be useful to other organizations.

L’évolution technologique ainsi que l’augmentation incessante de la puissance de calcul requise par les applications font des architectures ”many-core” la nouvelle tendance dans la conception des processeurs. Ces architectures sont composées d’un grand nombre de ressources de calcul (des centaines ou davantage) ce qui offre du parallélisme massif et un niveau de performance très élevé. En effet, les architectures many-core permettent d’exécuter en parallèle un grand nombre d’applications, venant d’origines diverses et de niveaux de sensibilité et de confiance différents, tout en partageant des ressources physiques telles que des ressources de calcul, de mémoire et de communication. Cependant, ce partage de ressources introduit également des vulnérabilités importantes en termes de sécurité. En particulier, les applications sensibles partageant des mémoires cache avec d’autres applications, potentiellement malveillantes, sont vulnérables à des attaques logiques de type canaux cachés basées sur le cache. Ces attaques, permettent à des applications non privilégiées d’accéder à des informations secrètes sensibles appartenant à d’autres applications et cela malgré des méthodes de partitionnement existantes telles que la protection de la mémoire et la virtualisation. Alors que d’importants efforts ont été faits afin de développer des contremesures à ces attaques sur des architectures multicoeurs, ces solutions n’ont pas été originellement conçues pour des architectures many-core récemment apparues et nécessitent d’être évaluées et/ou revisitées afin d’être applicables et efficaces pour ces nouvelles technologies. Dans ce travail de thèse, nous proposons d’étendre les services du système d’exploitation avec des mécanismes de déploiement d’applications et d’allocation de ressources afin de protéger les applications s’exécutant sur des architectures many-core contre les attaques logiques basées sur le cache. Plusieurs stratégies de déploiement sont proposées et comparées à travers différents indicateurs de performance. Ces contributions ont été implémentées et évaluées par prototypage virtuel basé sur SystemC et sur la technologie ”Open Virtual Platforms” (OVP). / The technological evolution and the always increasing application performance demand have made of many-core architectures the necessary new trend in processor design. These architectures are composed of a large number of processing resources (hundreds or more) providing massive parallelism and high performance. Indeed, many-core architectures allow a wide number of applications coming from different sources, with a different level of sensitivity and trust, to be executed in parallel sharing physical resources such as computation, memory and communication infrastructure. However, this resource sharing introduces important security vulnerabilities. In particular, sensitive applications sharing cache memory with potentially malicious applications are vulnerable to logical cache-based side-channel attacks. These attacks allow an unprivileged application to access sensitive information manipulated by other applications despite partitioning methods such as memory protection and virtualization. While a lot of efforts on countering these attacks on multi-core architectures have been done, these have not been designed for recently emerged many-core architectures and require to be evaluated, and/or revisited in order to be practical for these new technologies. In this thesis work, we propose to enhance the operating system services with security-aware application deployment and resource allocation mechanisms in order to protect sensitive applications against cached-based attacks. Different application deployment strategies allowing spatial isolation are proposed and compared in terms of several performance indicators. Our proposal is evaluated through virtual prototyping based on SystemC and Open Virtual Platforms(OVP) technology.

Nesta dissertação, Plataformas Logísticas são apresentadas como infraestruturas para integração de transportes e geração de negócios. O interesse de diversos atores (operadores logísticos, indústrias, autoridades locais e regionais) requer um complexo planejamento de atividades associadas a aspectos geográficos, operacionais, gerenciais, administrativos e econômicos. Baseando-se em experiências internacionais, destacadamente a experiência alemã com as Güterverkehrszentren, este trabalho busca sistematizar as etapas necessárias para se avaliar a viabilidade de projetos que, muitas vezes, requerem participação pública e privada. Tal interação entre entes públicos e privados deixa o processo ainda mais complexo, dados os intrínsecos conflitos de interesse ao se planejar e projetar uma Plataforma Logística. Ao se buscar o estado da arte sobre o assunto, um procedimento de análise de projetos é sugerido e sua aplicação é feita associada ao caso da Plataforma Logística de Goiás, para a qual se identificaram possíveis fatores que levaram a não conclusão do empreendimento, apesar das medidas de governança adotadas pelo Estado. / In this dissertation, logistics platforms are presented as infrastructures for the transport integration and business generation. The interest of several stakeholders (third-party logistics, industries, local and regional authorities) requires a complex plan of activities associated with geographic, operational, managerial, administrative and economic features. Based on international experiences, especially the German experience with Güterverkehrszentren, this dissertation seeks to systematize the steps needed to assess the feasibility of projects that often require public and private participation. Such interaction between public and private entities makes the process even more complex, given the inherent conflicts of interest when planning and designing a logistics platform. Considering the state of the art on the subject, a design analysis procedure is proposed and its application is in the form of case study of the Logistics Platform of Goiás, for which have been identified possible factors leading to non-completion of the project despite measures taken by the State for governance.

O cenário mundial se configura integrado, dinâmico, com alto desenvolvimento tecnológico e capacidade produtiva. Milhões de pessoas estão ingressado no mercado de consumo e os recursos naturais vêm se esgotando simultaneamente ao aumento dos resíduos sólidos urbanos, comprometendo a sustentabilidade do planeta. Neste contexto complexo, os desafios que as empresas enfrentam para se manterem competitivas são inúmeros. O modelo metaprojetual que consolida o design como estratégia competitiva e propõe a construção de plataformas de conhecimentos que dêem suporte às tomadas de decisão de projeto é um dos caminhos para este enfrentamento e foi adotado na pesquisa. Foi realizado um Estudo de Caso para confrontar o modelo teórico do esquema sistêmico de desenvolvimento do processo metaprojetual, com o modelo praticado por uma indústria. Com os dados coletados foi possível fazer uma análise comparativa entre os dois modelos e identificar os pontos fortes e fracos de cada um. O estudo permitiu indicar temas a serem trabalhados na plataforma de conhecimentos da empresa, no sentido de gerar inputs para a construção de cenários e soluções de projeto inovadoras. Também foi possível propor novas diretrizes para compor o modelo teórico adotado e que poderão ser úteis para outras organizações. / The world scenario is configured integrated, dynamic, with both, high technological development and productive capability. While millions of people are entering into the consumer market, the natural resources are running out simultaneously with the rise of municipal solid waste, affecting the sustainability of the planet. In this complex context, the challenges faced by companies in order to remain competitive are innumerous. The metaprojectual model that consolidates the design as a competitive strategy and proposes the construction of knowledge platforms to support the decision-making in the projectual activity is one of the ways to deal with, and it was adopted in this research. A case study was conducted to confront the theoretical model of the systemic scheme of metaprojectual development process, with the model practiced by an industry. With the research data it was possible to do a comparative analysis between the two models and identify the strengths and weaknesses of each one of them. The study enabled to indicate subjects to be included in the company's knowledge platform in order to generate inputs for the construction of scenarios and innovative design solutions. It was also possible to propose new guidelines to be part of the theoretical model that may be useful to other organizations.

Dissertação(mestrado) - Universidade Federal do Rio Grande, Programa de Pós-Graduação em Oceanografia Física, Química e Geológica, Instituto de Oceanografia, 2011. / Submitted by Cristiane Silva (cristiane_gomides@hotmail.com) on 2013-03-12T12:42:52Z No. of bitstreams: 1 2011_lorena_collares.pdf: 4980623 bytes, checksum: fe164915b150fc2e5673516c2d5626b7 (MD5) / Approved for entry into archive by Bruna Vieira(bruninha_vieira@ibest.com.br) on 2013-07-15T17:50:41Z (GMT) No. of bitstreams: 1 2011_lorena_collares.pdf: 4980623 bytes, checksum: fe164915b150fc2e5673516c2d5626b7 (MD5) / Made available in DSpace on 2013-07-15T17:50:41Z (GMT). No. of bitstreams: 1 2011_lorena_collares.pdf: 4980623 bytes, checksum: fe164915b150fc2e5673516c2d5626b7 (MD5) Previous issue date: 2011 / Os icebergs representam uma distinta feição no Oceano Austral. As correntes oceânicas, o gelo marinho, a batimetria e os ventos são responsáveis por determinar a trajetória destes grandes blocos de gelo. Desta forma, informações sobre a distribuição e a concentração dos icebergs podem auxiliar no melhor entendimento da circulação oceânica e atmosférica nas regiões polares. Diferentes métodos de observação de icebergs têm sido utilizados ao longo do tempo para o entendimento desta componente da criosfera. Duas metodologias despontam para tal objetivo, plataformas de coleta de dados (PCDs) rastreadas via sistema satelital ARGOS e as imagens de radar. A fim de monitorar o deslocamento de icebergs, no noroeste do Mar de Weddell, foram utilizados dados de posição de PCDs fixadas em três icebergs (em 19 de fevereiro de 2009) nas proximidades da ilha James Ross. Imagens Advanced Synthetic Aperture Radar (ASAR) foram utilizadas como medida complementar no rastreamento de icebergs durante os anos de 2008 e 2009. A partir dos resultados foi possível associar a deriva dos icebergs monitorados aos principais sistemas de correntes e frentes desta região, como a Corrente Costeira Antártica, a Frente de Talude Antártico e a Frente de Weddell. Mais especificamente, pode-se observar aspectos da circulação regional, tal como a identificação de uma célula de circulação anticiclônica no entorno da ilha James Ross e a deriva de icebergs em direção ao Estreito de Bransfield. Um estudo de caso demonstrou a recirculação de um iceberg no interior do Estreito de Bransfield e sua desintegração associada. A estimativa média da taxa de desintegração dos icebergs monitorados foi de 19%, associadas com um fluxo de volume de água doce para o oceano de aproximadamente 0.57 m3 s-1 e 0.94 m3s-1, respectivamente durante o período de observações nos anos de 2008 e 2009. A velocidade média de deriva calculada através do monitoramento via PCDs e imagens ASAR foi de 3.04 ±1.9 cm s-1 e 5.97 ± 2.8cm s-1, respectivamente. / Icebergs represent a distinctive feature of the Southern Ocean. Ocean currents, sea ice, bathymetry and winds determine the icebergs trajectory and its drift. Thus, information about icebergs distribution and concentration help to better understand the ocean and atmospheric circulation in Polar Regions. Several methods to observe icebergs have been used to comprehend the behavior and the role of this component of the cryosphere. Two methodologies are emerging for this purpose recently, such as icebergs tagging (for satellite tracking) and orbital radar images. In order to monitor the displacement of icebergs in the northwestern Weddell Sea, we used data from three icebergs tagged with Data Collection Platforms - DCPs (19/02/2009) in the vicinity of the James Ross Island. Additionally, ASAR images were used as a complementary measure to track the icebergs during the years 2008 and 2009 in the same area. Observing the results, it was possible to associate the icebergs drift with the main currents and fronts systems found in this region, as the Antarctic Coastal Current, Antarctic Slope Front and Weddell Front. More specifically, one can observe the regional circulation, such as the identification of an anticyclonic circulation cell around the James Ross Island and icebergs drifting into the Bransfield Strait. A case study demonstrated the recirculation of iceberg within the Bransfield Strait and its corresponding loss of mass. The icebergs disintegration estimated was 19%, associated with a freshwater volume flow toward the ocean of approximately 0,57 m3 s-1 and 0,94 m3 s-1 , respectively during the observation period, for the years 2008 and 2009. The drift rates determined by monitoring icebergs via DCPs and ASAR images were, respectively, 3,04 ±1,9 cm s-1 and 5,97 ± 2,8cm s-1.

With the Internet of Things becoming more and more popular, and a prediction that there will be more than 50 million devices connected to the Internet in 2020, the quantity of IoT platforms on the market is rapidly growing. Facing so many platforms to choose, the object of this thesis is to give some suggestions for reference by performing a quantitative comparison between two platforms: SensibleThings and Kaa. These two platforms have difference architectures so may suitable in different scenes. The comparison includes some measurement and evaluation under two designed scenarios and a general contrast in theory. Two scenarios cover cases of message delivery between two endpoints at different rates and multiple endpoints pushing log data continually. The result of measurement together with the theoretical analysis draw out the following conclusion. SensibleThings platform is more suitable for simple and small-scale message delivery between endpoints, like home environment with few devices. And Kaa platform is more suitable for large-scale and complicated application for data collection and processing, like meteorology field with huge amount of sensors and data.