1000 resultados para Adaptação aberta. Autoadaptação. Componentes. OSGi


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Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

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A dificuldade que os agricultores têm de se apropriar de tecnologias geradas por instituições de Ciência e Tecnologia agropecuárias está relacionada com a dificuldade que têm os pesquisadores em incluir os agricultores em suas pesquisas, porém esse não é o principal problema, e sim a ausência de projetos que consigam articular-se com os sistemas cognitivos dos agricultores. Buscou-se interpretar a percepção dos agricultores sobre o sistema de cultivo de corte e trituração proposto pelo Projeto SHIFT capoeira à agricultores familiares do nordeste do Pará. Foram realizados experimentos participativos para comparar os sistemas corte-queima e corte-trituração a partir da percepção dos agricultores, enfocando-se principalmente a gestão do trabalho e o controle de invasoras no preparo do roçado. Os dados mais relevantes da pesquisa foram obtidos através do acompanhamento do preparo da roça de seis agricultores, momento em que pôde-se conhecer o saber tradicional mobilizado no sistema corte e queima. Assim pôde-se avaliar que o sistema corte e trituração não apresenta componentes que inviabilizem sua articulação com o saber tradicional.

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Pós-graduação em Desenvolvimento Humano e Tecnologias - IBRC

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The steel type AISI 4130 (ultra-high strength steel) is an alloy of low carbon and its main alloying elements are chromium and molybdenum, which improves the toughness of the weld metal. It has numerous applications, especially where the need for high mechanical strength. It is widely used in equipment used by the aviation industry, such as cradle-tomotor, and this is the motivation for this study. Cots are of fundamental importance, because the engine supports and maintains balance in the fixed landing gear. This equipment is subjected to intense loading cycles, whose fractures caused by fatigue are constantly observed. Will be determined the effects caused by re-welding the structure of aeronautical equipment, and will also study the microstructure of the metal without welding. The studies will be done on materials used in aircraft, which was given to study. The results provide knowledge of microstructure to evaluate any type of fracture that maybe caused by fatigue. Fatigue is a major cause of aircraft accidents and incidents occurred, which makes the study of the microstructure of the metal, weld and re-solder the knowledge essential to the life of the material. The prevention and control of the process of fatigue in aircraft are critical, since the components are subjected to greater responsibility cyclic loading

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From a recent perspective the morse-taper dental implants connections are increasingly being used as an alternative for replacement of a missing teeth. Nevertheless, there are a large variety of prosthetic components available on the market with some limitations regarding the final prothesis. This article demonstrated the difficulties and limitations of prosthesis implant-retained connections when using morse-taper implants (with a prosthetic index) case in which the surgical placement of the implant wasn’t successfully performed. The alternative to overcome this scenario was the technique using the tube screw over the top of a mini abutment component. It was possible to manufacture and to have satisfactory adaptation, achieving the satisfaction of the patient, restoring function and esthetics.

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Este estudo objetivou adaptar culturalmente e analisar as propriedades psicométricas da versão brasileira da Underwood's Daily Spiritual Experience Scale (DSES). A adaptação seguiu as etapas internacionalmente recomendadas e a versão adaptada manteve equivalência com a original, após ajustes na redação de cinco itens. Na aplicação a 179 pacientes médico-cirúrgicos mostrou evidências de consistência interna (alfa de Cronbach=0,91), estabilidade temporal (ICC=0,94 no teste e reteste) e validade de construto convergente, na correlação com a subescala Religiosidade Intrínseca do instrumento DUREL (r=0,56; p<0,001). A análise fatorial exploratória extraiu três componentes, explicando 60,5% da variância do total. A versão brasileira da DSES apresenta evidências de confiabilidade e validade junto a pacientes hospitalizados. São necessários mais estudos para confirmar a sua composição fatorial e testar a sua aplicabilidade em diferentes populações.

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This Thesis main objective is to implement a supporting architecture to Autonomic Hardware systems, capable of manage the hardware running in reconfigurable devices. The proposed architecture implements manipulation, generation and communication functionalities, using the Context Oriented Active Repository approach. The solution consists in a Hardware-Software based architecture called "Autonomic Hardware Manager (AHM)" that contains an Active Repository of Hardware Components. Using the repository the architecture will be able to manage the connected systems at run time allowing the implementation of autonomic features such as self-management, self-optimization, self-description and self-configuration. The proposed architecture also contains a meta-model that allows the representation of the Operating Context for hardware systems. This meta-model will be used as basis to the context sensing modules, that are needed in the Active Repository architecture. In order to demonstrate the proposed architecture functionalities, experiments were proposed and implemented in order to proof the Thesis hypothesis and achieved objectives. Three experiments were planned and implemented: the Hardware Reconfigurable Filter, that consists of an application that implements Digital Filters using reconfigurable hardware; the Autonomic Image Segmentation Filter, that shows the project and implementation of an image processing autonomic application; finally, the Autonomic Autopilot application that consist of an auto pilot to unmanned aerial vehicles. In this work, the applications architectures were organized in modules, according their functionalities. Some modules were implemented using HDL and synthesized in hardware. Other modules were implemented kept in software. After that, applications were integrated to the AHM to allow their adaptation to different Operating Context, making them autonomic.

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Multi-Cloud Applications are composed of services offered by multiple cloud platforms where the user/developer has full knowledge of the use of such platforms. The use of multiple cloud platforms avoids the following problems: (i) vendor lock-in, which is dependency on the application of a certain cloud platform, which is prejudicial in the case of degradation or failure of platform services, or even price increasing on service usage; (ii) degradation or failure of the application due to fluctuations in quality of service (QoS) provided by some cloud platform, or even due to a failure of any service. In multi-cloud scenario is possible to change a service in failure or with QoS problems for an equivalent of another cloud platform. So that an application can adopt the perspective multi-cloud is necessary to create mechanisms that are able to select which cloud services/platforms should be used in accordance with the requirements determined by the programmer/user. In this context, the major challenges in terms of development of such applications include questions such as: (i) the choice of which underlying services and cloud computing platforms should be used based on the defined user requirements in terms of functionality and quality (ii) the need to continually monitor the dynamic information (such as response time, availability, price, availability), related to cloud services, in addition to the wide variety of services, and (iii) the need to adapt the application if QoS violations affect user defined requirements. This PhD thesis proposes an approach for dynamic adaptation of multi-cloud applications to be applied when a service is unavailable or when the requirements set by the user/developer point out that other available multi-cloud configuration meets more efficiently. Thus, this work proposes a strategy composed of two phases. The first phase consists of the application modeling, exploring the similarities representation capacity and variability proposals in the context of the paradigm of Software Product Lines (SPL). In this phase it is used an extended feature model to specify the cloud service configuration to be used by the application (similarities) and the different possible providers for each service (variability). Furthermore, the non-functional requirements associated with cloud services are specified by properties in this model by describing dynamic information about these services. The second phase consists of an autonomic process based on MAPE-K control loop, which is responsible for selecting, optimally, a multicloud configuration that meets the established requirements, and perform the adaptation. The adaptation strategy proposed is independent of the used programming technique for performing the adaptation. In this work we implement the adaptation strategy using various programming techniques such as aspect-oriented programming, context-oriented programming and components and services oriented programming. Based on the proposed steps, we tried to assess the following: (i) the process of modeling and the specification of non-functional requirements can ensure effective monitoring of user satisfaction; (ii) if the optimal selection process presents significant gains compared to sequential approach; and (iii) which techniques have the best trade-off when compared efforts to development/modularity and performance.

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Introdução: Em Portugal, são escassos os instrumentos validados para a população adolescente, que avaliem o importante construto da resiliência. Assim, o principal objetivo deste estudo consistiu na adaptação e validação preliminar da Escala de Avaliação do EU Resiliente (EAER) para adolescentes portugueses. Como segundo objetivo pretendemos, ainda, explorar as associações, na mesma amostra, entre a resiliência, o autodano e a ideação suicida na adolescência. Método: A amostra foi constituída por 226 adolescentes (sexo masculino, n = 139, 61,5%), entre os 12 e os 18 anos, que preencheram um protocolo composto por um questionário sociodemográfico, pela Escala de Avaliação do EU Resiliente (EAER), pelo Questionário de Impulso, Autodano e Ideação Suicida na Adolescência (QIAIS-A) e pela Escala de autoconceito. Resultados: Os resultados obtidos mostraram que a EAER possui boa fidelidade/consistência interna (α = 0,857) e boa estabilidade temporal (r = 0,720). Uma análise de componentes principais mostrou que a EAER apresenta três fatores: fator suporte externo, fator forças pessoais internas e fator estratégias de coping. Encontraram-se correlações negativas entre a resiliência e o autodano e ideação suicida e correlações positivas entre a resiliência e o autoconceito, confirmando-se a validade divergente e convergente da EAER. Verificaram-se níveis elevados de resiliência nos adolescentes da nossa amostra (M = 58,69; DP = 6,67). Na amostra total, 61,5% (n = 139) apresentou ideação suicida e 26,5% (n = 60) apresentou comportamentos de autodano. Conclusão: No seu conjunto, a EAER possui boas características psicométricas, pelo que pode ser considerada uma escala válida e útil e que pode ser usada com segurança na avaliação da resiliência em adolescentes portugueses. Com este estudo alargámos o leque de instrumentos válidos para a medição da resiliência em adolescentes e contribuímos para o avanço da investigação na área da adolescência em Portugal. / Introduction: In Portugal, there are few validated instruments to the adolescent population, to assess the important construct of resilience. Thus, the main objective of this study was the preliminary adaptation and validation of the Escala de Avaliação do EU Resiliente (EAER) to Portuguese adolescents. As a second objective, there is an intention to also explore the associations, on the same sample, between resilience, self-harm and suicidal ideation in adolescence. Method: The sample consisted of 226 adolescents (male, n = 139, 61.5%), between 12 and 18 years, who filled in a protocol consisting of a sociodemographic questionnaire, by the Escala de Avaliação do EU Resiliente (EAER), by the Impulse, Self-harm and Suicide Ideation Questionnaire for Adolescents (ISSIQ-A) and by the Self-concept Scale. Results: The results showed that the EAER has good fidelity/internal consistency (α = 0.857) and good temporal stability (r = 0.720). A principal component analysis showed that EAER has three factors: external support factor, internal personal strengths factor and coping strategies factor. There were negative correlations between resilience and the self-harm and suicidal ideation and positive correlations between resilience and self-concept, confirming the divergent and convergent validity of EAER. There were high levels of resilience in the adolescents of the sample (M = 58.69, SD = 6.67). In the total sample, 61.5% (n = 139) had suicidal ideation and 26,5% (n = 60) had self-harm behaviors. Conclusion: As a whole, the EAER has good psychometric properties, therefore it can be considered a valid and useful range, and can be safely used in the evaluation of resilience in Portuguese adolescents. With this study we have extended the range of valid instruments for the measurement of resilience in adolescents and contributed to the advance of research in the adolescence area in Portugal.

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"A família tem grande poder de influência e de transformação na vida de crianças e adolescentes. Os estudos recentes referem que o suporte familiar parece influenciar o desenvolvimento de comportamentos agressivos. Afirmam ainda a existência de uma relação entre o comportamento de bullying e o suporte que os jovens recebem das suas famílias. Assim, partindo da hipótese de que na fase da adolescência dos filhos, o suporte social dos pais poderá estar na origem de diferentes tipos de comportamentos agressivos/vitimizantes, o objetivo deste estudo é o de explorar as propriedades psicométricas do Questionário de Suporte Parental (QSP-6) – versão reduzida para Adolescentes (Clouse, 2007). Deste modo, apresentamos os resultados obtidos a partir de uma amostra de 728 adolescentes e jovens (372 do sexo feminino e 356 do sexo masculino) com idades compreendidas entre os 12 e os 21 anos. A estrutura relacional dos 18 itens foi avaliada por uma Análise Fatorial Exploratória (AFE) sobre a matriz de correlações, com extração dos fatores pelo método das componentes principais, seguido de rotação varimax. Os estudos psicométricos do QSP-6 revelam, de forma global, bons índices de fiabilidade e validade do instrumento."

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Dissertação de Mestrado, Neurociências Cognitivas e Neuropsicologia, Faculdade de Ciências Humanas e Sociais, Universidade do Algarve, 2016