Projeto e otimização de um motor brushless aplicado a um veículo de Fórmula SAE

TCC (graduação) - Universidade Federal de Santa Catarina. Centro Tecnológico. Engenharia Elétrica.Este trabalho consiste no projeto e na otimização de um motor elétrico aplicado à tração de um veículo elétrico monoposto de alto desempenho. Uma seleção comparativa de topologias de máquinas elétricas é feita, e então um modelo analítico do layout escolhido é descrito. Um algoritmo evolucionário é utilizado com o intuito de se encontrar uma solução otimizada de acordo com alguns critérios de desempenho selecionados. Posteriormente, em um software de simulação por elementos finitos, é feita a análise do projeto otimizado. Com isso, uma comparação entre o modelo analítico e o de elementos finitos é efetuada e os resultados são analisados. Por fim, são descritos os meios utilizados para a confecção de um protótipo que será utilizado para validar o projeto realizado.This work consists of the design and optimization of an electric motor applied to the traction of a single-seat high-performance electric vehicle. A comparative selection of topologies of electrical machines is made and then, an analytical model of the chosen layout was described. An evolutionary algorithm is used in order to find an optimized solution according to some selected performance criteria. Afterwards, the analysis of the selected design is made in a finite element simulation software. Thus, a comparison between the analytical model and the finite element model is performed and the results are analyzed. Finally, we describe the means used to make a prototype that will be used to validate the project carried out

Determination of amitriptyline and its main metabolites in human plasma samples using HPLC-DAD: application to the determination of metabolic ratios after single oral dose of amitriptyline

A simple and sensitive HPLC-DAD method for the simultaneous determination of amitriptyline, nortriptyline, E-10-hydroxyamitriptyline, Z-10-hydroxyamitriptyline, E-10-hydroxynortriptyline, Z-10-hydroxynortriptyline and desmethylnortriptyline in human plasma samples was developed and validated. The method employs a two step liquid-liquid extraction and a reversed phase separation with isocratic elution. Precision assays showed R.S.D % lower than 12.1% and accuracy was in the range of 93.1 to 102.5%. Lowest Limit of detection was 5 ng mL-1 for all analytes. Metabolic ratios of amitriptyline demethylation were evaluated in individuals genotyped for CYP2C19, with clear differences between volunteers with zero or two active alleles. The method is suitable for therapeutic drug monitoring of patients under amitriptyline treatment, also allowing the indication of CYP2C19 activity

Order of invasion affects the spatial distribution of a reciprocal intraguild predator

When intraguild predation is reciprocal, i.e. two predator species kill and feed on each other, theory predicts that well-mixed populations of the two species cannot coexist. At low levels of the shared resource, only the best competitor exists, whereas if the level of the common resource is high, the first species to arrive on a patch can reach high numbers, which prevents the invasion of the second species through intraguild predation. The order of invasion may therefore be of high importance in systems with reciprocal intraguild predation with high levels of productivity, with the species arriving first excluding the other species. However, natural systems are not well mixed and usually have a patchy structure, which gives individuals the possibility to choose patches without the other predator, thus reducing opportunities for intraguild predation. Such avoidance behaviour can cause spatial segregation between predator species, which, in turn, may weaken the intraguild interaction strength and facilitate their co-occurrence in patchy systems. Using a simple set-up, we studied the spatial distribution of two reciprocal intraguild predators when either of them was given priority on a patch with food. We released females of two predatory mite species sequentially and found that both species avoided patches on which the other species was resident. This resulted in partial spatial segregation of the species and thus a lower chance for the two species to encounter each other. Such behaviour reinforces segregation, because heterospecifics avoid patches with established populations of the other species. This may facilitate coexistence of two intraguild predators that would exclude each other in well-mixed populations

O Tapume : de elemento arquitetônico a significante de operações poéticas

Esta pesquisa tem por objetivo apresentar um processo de trabalho com foco na experiência artística com tapumes. Assim demonstro e problematizo, por meio da funcionalidade e da banalidade deste elemento arquitetônico, que envolve a cidade em transformação, os corpos e outros artefatos culturais em que intervenho, aquilo que é importante para mim, mas, principalmente, aquilo que é indiferente para todos. Aqui se encontra também a apresentação da documentação visual e das operações poéticas que estruturam um pensamento e seu objeto de investigação – o tapume – sob a perspectiva de uma mudança material e simbólica. Documento, analiso e discuto, com as referências teóricas, o uso dos tapumes, abordando questões referentes à dinâmica cultural do espaço urbano, do ponto de vista da intervenção, de apropriações e coleções, da identidade, da memória e da semiótica, que antecederam e fizeram parte do corpus de experimentação visual desta dissertaçãoThis research aims to present a work process focused on the artistic experience with sidings. This is how I demonstrate and problematize, through the functionality and banality of this architectural element, which involves the city in transformation, the bodies and other cultural artifacts in which I intervene, what is important to me, but mainly, what is indifferent to everyone. Here is also the presentation of visual documentation and poetic operations that structure a thought and its object of investigation - the siding - under the perspective of a material and symbolic change. Document, analyze and discuss, with theoretical references, the use of sidings, addressing issues related to the cultural dynamics of urban space, from the point of view of intervention, appropriations and collections, identity, memory and semiotics, which preceded and were part of the body of visual experimentation in this dissertation

Intercropped Plants Provide a Reservoir of Predatory Mites in Coffee Crop

Conservation biological control of pests may be achieved using a variety of integrated strategies based on crop diversification. We investigated whether the insertion of the intercropped plants species (IPS) Inga edulis, Senna macranthera, and Varronia curassavica modified the abundance of mites, their feeding behavior, and the dissimilarity of predator and herbivore mites over a gradient of distance from the IPS on coffee. To accomplish this, we recorded the mite species on coffee plants along transects of 16 m extending from the IPS, including on the IPS. A total of 8946 specimens were sampled. Tenuipalpidae was the most abundant family on coffee, followed by Tydeidae, while Eriophyidae was the most abundant on the IPS, followed by Phytoseiidae. The abundance and richness of mites differed between their feeding behavior and distance. The dissimilarity of predators and herbivores increased along a gradient of distance. Furthermore, the IPS harbored several mite species and the diversity of predator and herbivore mites among the IPS was different. The findings suggest that the intercropped plant species can attract and serve as a reservoir of predatory mites on coffee crops, which could improve the biocontrol of pest mites on coffee

Intercropped Plants Provide a Reservoir of Predatory Mites in Coffee Crop

Conservation biological control of pests may be achieved using a variety of integrated strategies based on crop diversification. We investigated whether the insertion of the intercropped plants species (IPS) Inga edulis, Senna macranthera, and Varronia curassavica modified the abundance of mites, their feeding behavior, and the dissimilarity of predator and herbivore mites over a gradient of distance from the IPS on coffee. To accomplish this, we recorded the mite species on coffee plants along transects of 16 m extending from the IPS, including on the IPS. A total of 8946 specimens were sampled. Tenuipalpidae was the most abundant family on coffee, followed by Tydeidae, while Eriophyidae was the most abundant on the IPS, followed by Phytoseiidae. The abundance and richness of mites differed between their feeding behavior and distance. The dissimilarity of predators and herbivores increased along a gradient of distance. Furthermore, the IPS harbored several mite species and the diversity of predator and herbivore mites among the IPS was different. The findings suggest that the intercropped plant species can attract and serve as a reservoir of predatory mites on coffee crops, which could improve the biocontrol of pest mites on coffee

Croma: vol.6, nº12 (Jul./Dez. 2018)

A Inflação de imagens e as imagens armadilha. A formatação industrial de discursos, as crescentes movimentações de mercadorias e agências publicitárias fazem surgir novas autorias, imagens não artísticas mas muito persuasivas. São as imagens armadilha, imagens com uma capacidade bélica, imagens destruidoras, que vão ocupar todo o território do imaginário. A liberdade está ameaçada, o pensamento parece ser cada vez mais único, a criatividade exprime-se nos divertidos consumos.info:eu-repo/semantics/publishedVersio