Sound generation and propagation in circular ducts for frequencies beyond the cut-on frequencies of several higher order acoustic modes is investigated. To achieve this, experimental and numerical set-ups are designed and used to research aeroacoustic interactions between in-duct components and to conceive noise mitigation strategies. Describing in-duct sound for frequencies with a moderate number of propagating modes is important, for example, for improving the noise emission from mid-size ventilation systems. Challenges that are largely unacknowledged in the literature involve efficient test rig design, quantification of limits in the methods, numerical modelling, and development of effective noise mitigation strategies for higher order modes. In this thesis, in-duct sound is mapped on a set of propagating pressure eigenmodes to describe aeroacoustic components as multi-ports with sound scattering (passive properties) and a source strength (active properties). The presented analysis includes genetic algorithms and Monte Carlo Methods for test rig enhancement and evaluation, multi-port network predictions to identify model limitations, and scale resolving (IDDES) and Linearized Navier Stokes computations for numerical multi-port eduction and the silencer design. It is first shown that test rig optimization improves the quality of multi-port data significantly. Subsequently, measurements on orifice plates are used to test the network prediction model. The model works with high accuracy for two components that are sufficiently separated. For small separations, strong coupling effects are observed for the source strength but not for the scattering of sound. The measurements are used for numerical validation, which gives reliable results for coupled and uncoupled systems. The total acoustic power of tandem orifices is predicted with less than 2 dB deviation and the passive properties for most frequencies with less than 5 % difference from the measurement. The numerical (FEM) models are also used to design a completely integrated silencer for spinning modes that is based on micro-perforated plates and gives broadband attenuation of 3-6 dB per duct diameter silencer length. The multi-port method is a powerful tool when describing aerodynamically decoupled in-duct components in the low- to mid-frequency range. Due to a robust passive network prediction, multi-port methods are particular interesting for the design of silencer stages. Furthermore, the demonstrated applicability to numerical data opens novel application areas. / <p>QC 20170522</p> / IdealVent

Ce mémoire en recherche-création s’intéresse à la quête identitaire, et / ou au désir de tracer son propre chemin en réinterprétant les événements du passé. Le roman TRANSHUMANCES raconte le pèlerinage d’Alice sur la via Podiensis, qui relie la commune du Puy-en-Velay en France, à Santiago de Compostela en Espagne. Elle marche. Elle marche pour oublier, pour enterrer ses morts, pour avancer, ailleurs. Elle marche et fait de nombreuses rencontres. Par la conversation et la contemplation, elle tente d’apaiser les maux qui la rongent. Elle marche et apprivoise ce chemin mythique, mystique, cette route qui mène le croyant à la rencontre de Dieu et qui pousse l’impie à la rencontre de lui-même. Alice fait la connaissance de John. Ils se racontent des blagues et des secrets, partagent repas et larmes, deviennent frères d’ampoules et rentrent à la maison, changés. L’essai I ended up being my own trout (jeux de fragments avec Éric Plamondon) explore quant à lui à l’écriture fragmentaire, en s’intéressant particulièrement aux effets qu’opèrent les fragments sur la lecture. Éric Plamondon, avec sa trilogie 1984, utilise la forme fragmentaire afin de jouer avec le lecteur : il le fait douter de ses certitudes et le guide vers une vision manipulée de l’Histoire. Le lecteur est alors confronté à la pluralité des interprétations et doit s’imposer comme auteur de sa propre lecture. / This M.A thesis combines research and creative writing to focus on the tension between searching for and creating one’s identity, both acts which can only be achieved through the (re)interpretation of the past. The novel TRANSHUMANCES tells the story of Alice’s pilgrimage on the via Podiensis, which connects Puy-en-Velay, France, to Santiago de Compostela, Spain. There, she walks. She walks to forget, to bury her dead, to move forward, to be elsewhere. Through conversation and contemplation she tries to fight her gnawing anxiety. She walks to harness the power of the mythical and mystical road: the road that leads the believer to a meeting with God, the godless to a meeting with himself. Alice meets John. They exchange jokes and secrets, share meals and tears, become blister brothers and return home, changed. The essay I ended up being my own trout (jeux de fragments avec Éric Plamondon) explores fragmentary writing, with particular attention to the effects of the fragment on the act of reading. Éric Plamondon, with his trilogy 1984, playfully uses the fragmentary form to encourage the reader to doubt his certainties and to guide him towards a manipulated version of history. The reader is thus confronted with a plurality of interpretations and must acknowledge his position as the author of his own reading.

Este trabalho teve por finalidade simular a hidrodinâmica da Plataforma Continental Interna do Estado de São Paulo (PCISP) e da Plataforma Continental Média do Estado de São Paulo (PCMSP) no período de verão, em resposta às forçantes do gradiente de densidade, do vento climatológico e das marés, através da implementação do modelo numérico hidrodinâmico tridimensional Regional Ocean Modeling System (ROMS). Os experimentos realizados mostraram que os efeitos da distribuição de densidade sobre o comportamento geral da circulação na PCISP e PCMSP são secundários quando comparados à circulação induzida pela tensão de cisalhamento do vento. Os resultados apontam que na PCISP e na PCMSP a componente de velocidade paralela à costa é dominada por forçantes de frequência subinercial, como o vento climatológico e o gradiente de densidade, enquanto que a componente normal, na direção normal à costa, é fortemente influenciada pela forçante de maré. / The aim of this study was simulate the hydrodynamic of the Inner Continental Shelf of the State of São Paulo (PCISP) and of the Mid Continental Shelf of the State of São Paulo (PCMSP) during summer, in response to the density gradient forcing, to the climatological wind shear stress forcing and to the tide forcing, applying the tridimensional hydrodynamic numeric model Regional Ocean Modeling System (ROMS). The experiments performed showed the effects of the density distribution over the general circulation behavior in the PCISP and PCMSP are secondary compared with the induced climatological wind shear stress circulation. The results indicate that in the PCISP and in the PCMSP the component velocity parallel to the coast is dominated by subinertial frequencies forcing, as the climatological wind and the density gradient, while the component velocity perpendicular to the coast is strongly influenced by the tide forcing.

O trabalho apresenta a análise do comportamento da base de pilares de concreto pré-moldado na ligação com cálice de fundação, dando-se continuidade a estudos anteriores sobre este tipo de ligação. A pesquisa visa preencher a falta de informações sobre o comportamento da base de pilares na região de embutimento, já que praticamente não existem recomendações sobre o assunto. É realizada uma investigação experimental, com a construção de dois modelos, em que os cálices de fundação foram aproveitados de pesquisas anteriores. Os modelos possuem interface de contato lisa, com comprimento de embutimento diferente e foram submetidos a força normal com grande excentricidade. São apresentadas simulações numéricas pelo Método dos Elementos Finitos, com a consideração das não linearidades físicas, geométricas e de contato. É feita uma análise comparativa entre os modelos físicos e numéricos, sendo observados os deslocamentos, deformações na armadura longitudinal e transversal, fissuração e fluxo de tensões. Os resultados apresentados mostram que a ruína dos modelos ocorreu pela plastificação da armadura longitudinal tracionada, localizada fora da região de embutimento e que a armadura transversal foi pouco solicitada. São feitas recomendações sobre a ancoragem da armadura longitudinal e ao final do trabalho é sugerido um modelo de bielas e tirantes que represente o comportamento da base de pilares na região de embutimento / The study presents the analysis of precast concrete column base in the connection socket. This research follows previous studies on this connection type. The research aim to fill out the lack of information about column base in the embedded length, because almost do not exist recommendations about this subject. An experimental investigation was developed with the construction of two models, which connection sockets were reused from previous researches. The models have smooth contact interface with different embedded lengths and the axial load with great eccentricity was applied in the models. Numeric simulations are presented by using the Finite Element Method adopting non-linear physical, geometric, and contact. A comparative analysis was done between the tests and numeric models that were observed the displacements, longitudinal and transversal reinforcement strain, cracking, and stress flow. The results show that the ruin of the models occurred for large strain in longitudinal tensioned reinforcement located out of embedded length. The transversal reinforcement presents little strain. Recommendations are made for anchorage of longitudinal reinforcement and at the end of the research an analytical model for column base behavior is suggested for connecting foundation by socket

Este trabalho apresenta uma Análise sobre os Comandos Numéricos Computadorizados de Arquitetura Aberta aplicado na automação de Máquina-ferramentas e no uso da manufatura. É realizado uma classificação das Arquiteturas Abertas (em relação ao hardware, software, funcionalidade e flexibilidade) e uma comparação entre os CNC\'s convencionais e os CNC\'s de Arquitetura Aberta. / This work presents an Open Architecture CNCs analysis. An Open Architecture classification using hardware, software, functionality and flexibility are presented. A comparison table with conventional CNCs and this new class of CNCs are elaborated.

Este trabalho teve por finalidade simular a hidrodinâmica da Plataforma Continental Interna do Estado de São Paulo (PCISP) e da Plataforma Continental Média do Estado de São Paulo (PCMSP) no período de verão, em resposta às forçantes do gradiente de densidade, do vento climatológico e das marés, através da implementação do modelo numérico hidrodinâmico tridimensional Regional Ocean Modeling System (ROMS). Os experimentos realizados mostraram que os efeitos da distribuição de densidade sobre o comportamento geral da circulação na PCISP e PCMSP são secundários quando comparados à circulação induzida pela tensão de cisalhamento do vento. Os resultados apontam que na PCISP e na PCMSP a componente de velocidade paralela à costa é dominada por forçantes de frequência subinercial, como o vento climatológico e o gradiente de densidade, enquanto que a componente normal, na direção normal à costa, é fortemente influenciada pela forçante de maré. / The aim of this study was simulate the hydrodynamic of the Inner Continental Shelf of the State of São Paulo (PCISP) and of the Mid Continental Shelf of the State of São Paulo (PCMSP) during summer, in response to the density gradient forcing, to the climatological wind shear stress forcing and to the tide forcing, applying the tridimensional hydrodynamic numeric model Regional Ocean Modeling System (ROMS). The experiments performed showed the effects of the density distribution over the general circulation behavior in the PCISP and PCMSP are secondary compared with the induced climatological wind shear stress circulation. The results indicate that in the PCISP and in the PCMSP the component velocity parallel to the coast is dominated by subinertial frequencies forcing, as the climatological wind and the density gradient, while the component velocity perpendicular to the coast is strongly influenced by the tide forcing.

Le matériau BiFeO3 (BFO) est le sujet de très nombreuses études fondamentales dans le domaine des matériaux multiferroïques. Cet intérêt est du au fait que cet oxyde présente deux ordres à longue distance à la température ambiante : ferroélectricité et antiferromagnétisme de type G (ce dernier est aussi non colinéaire avec la présence de faible ferromagnétisme ainsi qu’une modulation de spin de type cycloïdale possédant une longueur d’onde de 620 angstrœm). Il est alors possible d’étudier les comportements de couplage entre les propriétés électrique et magnétique. Ce travail concerne principalement la synthèse, les structures haute température, et les propriétés physiques (électronique et magnétique principalement) du matériau BiFeO3 ayant subi des recuits de différentes pressions partielles d’oxygène. La première étape de ce travail concerne l’étude de la synthèse afin de déterminer le protocole optimal de réalisation des céramiques. Les recuits sous atmosphère ont eu pour but de modifier la stœchiométrie en oxygène du matériau, afin d’affecter ses propriétés physiques. Des modifications de faible amplitude de certaines propriétés ont été détectées, mais à l’inverse, la température de Néel et la température de Curie ne sont pas affectées.Concernant la nature des structures haute température, les phases beta et gamma, sujettes à de nombreuses controverses dans la littérature, ont été étudiées par diffraction des rayons X et analyse DSC sur BFO pur ou avec excès de bismuth. Cet excès a permis de stabiliser la phase gamma entre 940 et 950°C, en évitant sa décomposition. Pour compléter ce travail sur BFO en phase pure, nous avons dopé des céramiques avec 10 % de Zr4+ pour étudier le comportement structurale à haute température, ainsi que les propriétés magnétiques et électriques de cette nouvelle composition. Enfin, des simulations numériques sur le composé stœchiométrique, lacunaire en bismuth ou en oxygène ont été réalisées pour comprendre les évolutions structurale, électronique et magnétique du matériau suite aux recuits. La dernière partie est une étude sur le comportement basse température de BFO pur sous différentes formes : nanotubes, céramiques et monocristaux. Nous avons analysé le comportement électrique (impédance, pyroélectricité, RPE et électrostriction), magnétique (aimantation en fonction de la température et du champ magnétique) et structurale (rayon X en thêta-2thêta et rasant, DSC, microRaman et résonance d’ultrasons). Suite à ces études, trois températures sont observées comme présentant un comportement particulier : 140 et 200 K, qui semblent liées par de nombreuses techniques d’analyses et ressortent comme étant une transition à la surface de BFO, mais aussi 180 K où nous avons un écart à la linéarité de la dilatation thermique et un effet d’électrostriction. / BiFeO3 material is the subject of number fundamental studies in multiferroic materials. This interest is mainly cause by the existence of two long range order at room temperature : ferroelectricity and G type antiferromagnetism (this one is also no collinear with the presence of a weak ferromagnetism, and a cycloidal spin modulation with a wave length of 620 angstrom). So, it is possible to study coupling behaviour between electrical and magnetic properties.This work is mainly about the synthesis, high temperature structures, and physical properties (principally electronic and magnetic one) in BFO material after sintering it under different oxygen partial pressure. The first step of this work is about the synthesis study in order to optimize the protocol of ceramic formation. The sintering under atmosphere are done in order to change the oxygen stoichiometry of BFO, we expected to affect this physical properties. We saw some weak modifications of few properties, but Néel and Curie temperature are not altered.Concerning the nature of BFO high temperature structure, beta and gamma phase, which are subject of number controversies in literature, were studied with X-rays and DSC analysis, in pure or in bismuth excess phase. This excess leads to stabilize the gamma phase between 940 and 950°C, and avoid decomposition. To complete this work on pure phase BFO, we doped ceramic with 10 % of Zr4+ in order to study the high temperature structural behaviour, electrical and magnetic properties of this new composition. At last, numerical simulation on the stoichiometric, bismuth or oxygen lacunar system are done to understand structural, electrical and magnetic evolution after the sintering.The last part is a study on behaviour of pure phase BFO at low temperature with different form : nanotube, ceramic and single crystal. We analysed electrical (impedance, pyroelectricity, EPR and electrostriction), magnetic (magnetization function of temperature and magnetic field) and structural comportment (X-rays in theta-2theta and grazing incidence, DSC, microRaman and ultrasonic resonance). It reveals that tree temperature show a specific behaviour : 140 and 200 K, which are link by several analysis technical and seems to be a surface transition (skin effect) in BFO, but also 180 K where we found a non constant evolution in the thermal dilatation, and an electrostriction effect.

Made available in DSpace on 2016-04-27T16:58:53Z (GMT). No. of bitstreams: 1 Graziele Cristine Moraes da Silva.pdf: 1632658 bytes, checksum: e83f2c95a08b868be50f260a29e863ab (MD5) Previous issue date: 2009-05-14 / Secretaria da Educação do Estado de São Paulo / This research aims to investigate the ownership of the numerical expression for students in 5th grade of elementary school, from conversions of Semiotics Representation Registers which will be addressed in this paper the following records: material, natural language and numerical, with the completion of arithmetic processing, and using as a tool the game Contig 60®. We have as a theoretical framework of the Didactic Situations Theory from Guy Brousseau and Semiotics Representation Registers of Raymond Duval. The research was qualitative and as a method it was adopted some assumptions of Engineering Teaching. The teaching sequence was developed to allow students interaction with the activities without requiring the use of rules for the resolution of the problem-situations. To do so, we used the strategy of the game Contig 60®, because it has the characteristic to develop the thinking and stimulate discussion. We stressed the importance of teaching mathematics with the use of games, because playing the student is concerned not with the error, but to participate in the activity, moreover, he can often play the role of researcher in the construction of knowledge. After intervention with the strategy game Contig 60® it was observed that the students improved knowledge on the numerical expression and use as a tool for modeling the problem-situations, and perform the treatments and conversions proposed satisfactorily / Esta pesquisa tem por objetivo investigar a apropriação da expressão numérica por alunos de 5ª série do Ensino Fundamental, a partir de conversões de Registros de Representação Semiótica. Neste trabalho, serão abordados os registros: material, língua natural e numérico, com a realização do tratamento aritmético, tendo como ferramenta o jogo Contig 60®. Temos por referencial teórico a Teoria das Situações Didáticas de Guy Brousseau e o Registro de Representação Semiótica de Raymond Duval. A investigação foi qualitativa e, como método, adotou-se alguns pressupostos da Engenharia Didática. A seqüência didática foi elaborada para permitir a interação dos sujeitos com as atividades, sem ser necessário o uso de regras para a resolução das situações problema. Para isso, utilizamos o jogo de estratégia Contig 60®, pois ele tem como característica desenvolver o raciocínio e estimular o questionamento. Ressaltamos a importância do ensino de Matemática com o uso de jogos, porque, ao jogar, o aluno não se preocupa com o erro e sim em participar da atividade, além disso, pode, muitas vezes, desempenhar o papel de pesquisador na construção do conhecimento. Após a intervenção com o jogo de estratégia Contig 60®, observamos que os sujeitos aprimoraram o conhecimento em relação às expressões numéricas e a passaram a utilizá-las como uma ferramenta para modelar as situações-problema, além de realizarem os tratamentos e conversões propostas de modo satisfatório

Introdução: A Dor Pélvica Crônica (DPC) é um problema social, com alta prevalência, acometendo mulheres na idade reprodutiva. Cada vez mais salientamos a importância de investigar instrumentos apropriados para avaliação da dor, facilitando na prática clínica a escolha do melhor método que torne mais completa a avaliação de aspectos da intensidade na mensuração da dor crônica. Portanto, o objetivo deste estudo é correlacionar diferentes instrumentos de avaliação da intensidade dolorosa, a escala numérica (EN), escala visual analógica (EVA) e a algometria de pressão, nas mulheres com DPC, a fim de identificar o instrumento que melhor expressa o quadro doloroso. Métodos: foram avaliadas pelo ginecologista oitenta mulheres encaminhadas ao ambulatório do serviço de Ginecologia e Obstetrícia do Hospital de Clínicas de Porto Alegre (HCPA), trinta e três mulheres apresentaram algum aspecto dos nossos critérios de não inclusão. Selecionamos para participar do estudo quarenta e sete pacientes com DPC, sendo que vinte pacientes apresentavam endometriose diagnosticada por videolaparoscopia e vinte e sete pacientes apresentavam outras causas ginecológicas. Utilizamos no estudo um roteiro para anamnese cujos dados relacionados com a DPC foram coletados, tais como diagnóstico, tratamento, sintomatologia e locais da dor. Escores de dor foram classificados de acordo com a intensidade, através das escalas de dor (EN e EVA), instrumentos baseados no autorrelato do indivíduo e algometria de pressão, para verificar o limiar de dor à pressão das pacientes. Na análise dos dados, a concordância entre as escalas foi avaliada pelo coeficiente de correlação intraclasse (ICC) e a associação entre as escalas com o algômetro foi avaliada pelo coeficiente de correlação de Spearman, o nível de significância adotado foi de 5% (P<0,05). Resultados: As participantes do estudo tinham idade média de 38,3 ± 7,6 anos. Utilizamos o ICC para análise da correlação entre os instrumentos de relato da percepção dolorosa, ou seja, entre as EN e EVA, em relação à dor (0,992), na dismenorreia (1,00) e na dispareunia (0,996), e encontramos excelente concordância entre as escalas, com P<0,01. As associações da algometria com as escalas foram moderadas e inversas, apresentando diferenças estatisticamente significativas, quanto maior a pontuação nas escalas EN e EVA em relação à dispareunia, menores os valores no algômetro, exceto nos pontos LA1 e LA2 em ambos os lados. Também houve associação inversa das escalas EN e EVA na dismenorréia, no ponto LAB2 lado direito e associação inversa no ponto PS lado direito com a escala EVA de dor, com diferenças estatisticamente significativas. Conclusão: As escalas são instrumentos eficientes para avaliação da dor, podendo ser utilizada tanto a EN quanto a EVA na avaliação da intensidade dolorosa. Na avaliação das mulheres com DPC devemos utilizar a algometria de pressão associada à EN ou EVA, instrumentos inversamente proporcionais, confiáveis e sensíveis, tornando menos subjetiva a avaliação da dor para melhor expressar o quadro doloroso. / Introduction: The Chronic Pelvic Pain (CPP) is a social problem, with high prevalence, affecting women in reproductive age. Increasingly, has been emphasised the importance of investigating appropriate instruments for evaluation of pain in clinical practice, by facilitating the choice of the best method to make more complete the evaluation in measuring intensity aspects of chronic pain. Therefore, the objective of this study is to correlate different painful intensity assessment tools, the numeric scale (NS), visual analogue scale (VAS) and algometry pressure, in women with CPP, in order to identify the instrument that best expresses the pain. Methods: were evaluated by the gynecologist eighty women referred to the Gynecology and Obstetrics service, Clinical Hospital of Porto Alegre (HCPA), thirty three women had some aspect of our criteria for not inclusion. The study included forty seven patients, twenty patients had endometriosis diagnosed by laparoscopy and twenty seven patients had other gynecological causes. For the analyses in this study we used a road map for anamnesis whose data related to the CPP was collected, such as diagnosis, treatment, symptoms and pain locations. In addition, pain scores were classified according to intensity, through the pain scales (NS and VAS), based on self-report instruments of individual and algometry, to verify the pressure pain threshold of the patients. Statistically, the agreement between scales was assessed by intraclass correlation coefficient (ICC) and the association between the scales with the algometer were evaluated by Spearman's rank correlation coefficient, the level of significance adopted was 5% (P<0,05). Results: Study participants had an average age of 38.3 ± 7.6 years old. In the statistical analysis, we used ICC reporting instruments of perception painful I mean, between NS and VAS regarding pain (0,992), in dysmenorrhoea (1.00) and Dyspareunia (0.996), and we found excellent correlation between scales, with P<0,01. The associations of algometria with the scales were moderate and inverses, showing differences statistically significant, the higher the score NS and VAS in relation to Dyspareunia smaller values in algometer, except in points LA1 and LA2 on both sides. Indeed, there were also inverse association of scales NS and VAS on dysmenorrhea, in point LAB2 in the right side and inverse association in point PS in the right side with scale VAS of pain, with statistically significant differences. Conclusion: the scales are effective instruments for evaluation of pain, and may be used both in NS and VAS at painful intensity evaluation. In the evaluation of women with CPP should be used the algometry pressure associated with NS or VAS, instruments inversely proportional, reliable and sensitive, making less subjective pain assessment to better express the pain.

Cette thèse est le fruit d’un partenariat entre la société Johnson Controls et l’université Bordeaux1. L’objectif s’inscrit dans le cadre d’un projet de développement de pompe à chaleur innovante et est de développer un compresseur centrifuge à haute compression. Pour ce faire, un modèle numérique a été créé afin de simuler l’écoulement dans ce type de compresseur. Afin de respecter des impératifs industriels, une première géométrie a été établie par modifications itératives de divers paramètres et analyse des performances induites. L’écoulement a ensuite été étudié plus précisément, particulièrement pour mieux comprendre l’apparition des décollements. Enfin, une étude instationnaire de l’écoulement dans le diffuseur a été effectuée. Au delà des phénomènes physiques étudiés et appréhendés au cours de ce processus, c’est avant tout une méthodologie qui valorise ce travail. / This thesis is the result of a partnership between the company Johnson Controls and the university Bordeaux1. The objective is part of a project to develop innovative heat pump and involves the design of a high head centrifugal compressor. To do this, a numerical model is created to simulate the flow in this kind of compressor. To observe industriel deadlines, a first geometry was established by iterative changes of various parameters in analysing induced effiencies. The flow was then studied further, especially to better understand the onset of flow separation. Finally, a study of unsteady flow in the diffuser was performed. Beyond the physical phenomena investigated and comprehended during this process, it is firstly a methodology that values this work.