Tese de Mestrado Integrado. Engenharia Electrotécnica e de Computadores. Área de Especialização de Automação. Faculdade de Engenharia. Universidade do Porto. 2012

Orientador : Kamal A. R. Ismail / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Campinas / Made available in DSpace on 2018-07-16T13:01:09Z (GMT). No. of bitstreams: 1 Stuchi_AderbalSebastiao_M.pdf: 2468651 bytes, checksum: 18dcfcee65efce6502bbf0ffa20d5c81 (MD5) Previous issue date: 1975 / Resumo: Uma teoria tridimensional linearizada é desenvolvida para hidrofóio diédrico operando abaixo da superfície livre. Partindo de uma equação básica do potencial de velocidade, equação do potencial de velocidade completo é obtida ap6s imposição das várias condições de contorno. Com o intuito de conseguir forma mais simples para a computação numérica, realizamos extensas manipulações sobre a equação do potencial de velocidade completo. Após estas manipulações, a equação do potencial de velocidade é usado para obtermos o campo de velocidades induzidas. Os cálculos numéricos são efetuados usando o método da tinha de sustentação refinada ou método da superfície de sustentação incompleta, no qual o hidrof6lio é substituído por uma linha de singularidades ao longo da envergadura e a 1/4 de corda da borda de ataque, impondo que a inclinação das linhas de corrente a 3/4 de corda da borda de ataque seja igual a inclinação do fó1io. Este método apresenta-se adequado para aspecto ratio moderados e al tos, com profundidades não muito pequenas. Devido as simplificações do método este não é válido para pequenos aspecto ratio, e os resultados obtidos para f61io muito próximo da superfície 1ivre discordam dos experimentais devido aos efeitos não lineares não serem considerados nesta análise. Determina-se um número de Froude crítico para o qual a sustentação é máxima. Acima do valor crítico, aumentando o número de Fraude a sustentação diminui, o mesmo ocorrendo quando diminuimos o número de Froude abaixo do valor crítico. Aumentando a profundidade de submergência a influência da superfície 1ivre diminui sendo esta infIuência tanto maior quanto menor o ângulo diédrico. Verificando-se que f61io de baixo aspect ratio são mais susceptíveis a influência da superfície 1ivre que fólio de alto aspect ratio / Abstract: Not informed / Mestrado / Mestre em Engenharia Mecânica

No description available.

Die vorliegende Dissertation analysiert Beobachtungen des Vela-Pulsars mit dem H.E.S.S.-Observatorium und präsentiert damit den ersten Nachweis gepulster Strahlung mit H.E.S.S. Die signifikante Detektion (11.4 s) oberhalb einer bis jetzt unerreichten Energieschwelle von lediglich 15 GeV wurde mittels von 24 h Beobachtungsdaten erzielt, die mit dem im Jahr 2012 in Betrieb genommenen CT5-Teleskop aufgezeichnet wurden. Nach dem Krebs-Pulsar ist damit der Vela-Pulsar der zweite Pulsar, von dem sehr hochenergetische Gammastrahlung nachgewiesen wurde. Die Spektren von Pulsaren im Bereich der sehr hochenergetischen Gammastrahlung sind von besonderem Interesse, da sie Einblicke in einen bisher fast komplett unerforschten Energiebereich erlauben. Der experimentelle Nachweis stellt eine besondere Herausforderung dar, da die Rate der Gammastrahlen gemäß einem Potenzgesetz mit der Energie abfällt und die resultierenden Zählraten klein sind. Daher werden neue gewichtete Testgrößen eingeführt, um die Sensitivität für den Nachweis schwacher Pulsationen für zukünftige Beobachtungen von Pulsaren zu verbessern. Die Testgrößen sind Erweiterungen von bereits existierenden ungewichteten Verfahren und anwendbar auf beliebige diskrete Daten, in denen ein Puls oder mehrere Pulse erwartet werden. Sie sind leistungsfähig für den Fall unbekannter Phasenprofile und erzielen bei Standardgewichtung eine 10 %-ige Steigerung der Detektionssignifikanz. Die optimierte Analysekette wurde zur Detektion des Vela-Pulsars im Energiebereich von 15 GeV bis 125 GeV eingesetzt. Der phasengemittelte integrierte Energiefluss beträgt 4.29_(-1.02)^(+1.14)_stat _(-3.31)^(+5.50)_sys × 10^(-11) erg cm^(-2) s^(-1) und wird durch einen einzelnen Puls verursacht. Das Profil des Pulses kann durch eine asymmetrischen Lorentz-Funktion mit einer schmaleren abfallenden Flanke beschrieben werden. Der Photonfluß fällt gemäß einem Potenzgesetz mit Index -5.39 mit der Energie ab. Dies ist in guter Übereinstimmung mit einem theoretischen Annular-Gap-Emissionsmodell. / The analysis of the first pulsar to be detected with the H.E.S.S. array is presented. The high significance detection at the 11.4 s level down to a hitherto unachievable 15 GeV energy threshold is a result of 24 h of observations of the Vela pulsar with the new CT5 telescope introduced into the array in 2012. This is only the second pulsar to be detected in the very high energy (VHE) ?-ray regime. Of particular interest are the VHE spectra of pulsars as this is an almost completely unexplored energy domain. This does however entail smaller signals as the rate of ?-rays generally drops according to a power law function. New weighted statistical tests are introduced to improve the sensitivity to weak pulsations for use with future observations of pulsars. These tests are modifications of currently used tests and are applicable to any discrete data in which a single or many pulses are expected; they are powerful when the phase profile is unknown and with a basic weighting provide up to a 10 % boost in detection significance. An optimised analysis chain contributed to the detection of the Vela pulsar with phase averaged energy flux in the energy range (15,125) GeV of 4.29_(-1.02)^(+1.14)_stat _(-3.31)^(+5.50)_sys × 10^(-11) erg cm^(-2) s^(-1). The single pulse is characterised with an asymmetric Lorentzian function with a narrower trailing edge. The photon flux falls as a power law with index -5.39 which is moderately consistent with an Angular Gap emission model but represents a steeper drop in emission than that measured with the Fermi-LAT. The emission efficiency of the Vela pulsar in the VHE band is evaluated as 0.0025 %, which is comparable to that of the Crab pulsar in the same energy regime measured with the MAGIC telescope array. Comparisons to other candidate VHE pulsars are also drawn. A weak constraint is placed on the energy at which Lorentz invariance violation occurs in terms of the Planck energy as E_LIV>10^(-4) E_P.

Esta dissertação pretende encontrar as matrizes do conceito de antropofagia do modernista Oswald de Andrade, tal como ele foi formulado no Manifesto Antropófago de 1928 e em obras posteriores, tais quais a peça O Rei da Vela (1933) e a tese de filosofia A Crise da Filosofia Messiânica (1950), a partir de uma reflexão que busca dar conta dos processos alterativos de constituição de identidades em países periféricos. Oswald de Andrade foi autor de muitas das mais audaciosas experiências de vanguarda na América Latina e seus escritos seguem iluminando a história do Brasil desde então. Nesta chave, essa dissertação pretende também problematizar a articulação complexa entre a arte modernista e a história política e cultural do país, através da releitura da obra de Oswald de Andrade urdida pelo movimento tropicalista nos anos de 1970 e assim como é lida atualmente. / This dissertation seeks to find the matrixes of the concept of anthropophagy created by the modernist Oswald de Andrade, as it was formulated in the Manifesto Antropófago of 1928 and later works, such as the play O Rei da Vela (1933) and the philosophical thesis A Crise da Filosofia Messiânica (1950), from the standpoint of a line of thinking which seeks to analyse the alterative processes of identity formation in peripheral countries. Oswald de Andrade was the author of many of the most audacious avant-guard experiences in Latin America and his writings enlighten Brazil´s history ever since. Following this problematic, this dissertation aims also to understand, through the reading of the works of Oswald de Andrade which was developed by the tropicalist movement in the 1970´s, as well as its contemporary reception, the complex articulation of modernist art and the cultural and political history of the country.

This thesis is focussed on the Molonglo Observatory Synthesis Telescope (MOST), reporting on two primary areas of investigation. Firstly, it describes the recent upgrade of the MOST to perform an imaging survey of the southern sky. Secondly, it presents a MOST survey of the Vela supernova remnant and follow-up multiwavelength studies. The MOST Wide Field upgrade is the most significant instrumental upgrade of the telescope since observations began in 1981. It has made possible the nightly observation of fields with area ~5 square degrees, while retaining the operating frequency of 843 MHz and the pre-existing sensitivity to point sources and extended structure. The MOST will now be used to make a sensitive (rms approximately 1 mJy/beam) imaging survey of the sky south of declination -30&deg. This survey consists of two components: an extragalactic survey, which will begin in the south polar region, and a Galactic survey of latitudes |b| &lt 10&deg. These are expected to take about ten years. The upgrade has necessitated the installation of 352 new preamplifiers and phasing circuits which are controlled by 88 distributed microcontrollers, networked using optic fibre. The thesis documents the upgrade and describes the new systems, including associated testing, installation and commissioning. The thesis continues by presenting a new high-resolution radio continuum survey of the Vela supernova remnant (SNR), made with the MOST before the completion of the Wide Field upgrade. This remnant is the closest and one of the brightest SNRs. The contrast between the structures in the central pulsar-powered nebula and the synchrotron radiation shell allows the remnant to be identified morphologically as a member of the composite class. The data are the first of a composite remnant at spatial scales comparable with those available for the Cygnus Loop and the Crab Nebula, and make possible a comparison of radio, optical and soft X-ray emission from the resolved shell filaments. The survey covers an area of 50 square degrees at a resolution of 43&quot x 60&quot, while imaging structures on scales up to 30'. It has been used for comparison with Wide Field observations to evaluate the performance of the upgraded MOST. The central plerion of the Vela SNR (Vela X) contains a network of complex filamentary structures. The validity of the imaging of these filaments has been confirmed with Very Large Array (VLA) observations at 1.4 GHz. Unlike the situation in the Crab Nebula, the filaments are not well correlated with H-alpha emission. Within a few parsec of the Vela pulsar the emission is much more complex than previously seen: both very sharp edges and more diffuse emission are present. It has been postulated that one of the brightest filaments in Vela X is associated with the X-ray feature (called a `jet') which appears to be emanating from the region of the pulsar. However, an analysis of the MOST and VLA data shows that this radio filament has a flat spectral index similar to another more distant filament within the plerion, indicating that it is probably unrelated to the X-ray feature.

This thesis is focussed on the Molonglo Observatory Synthesis Telescope (MOST), reporting on two primary areas of investigation. Firstly, it describes the recent upgrade of the MOST to perform an imaging survey of the southern sky. Secondly, it presents a MOST survey of the Vela supernova remnant and follow-up multiwavelength studies. The MOST Wide Field upgrade is the most significant instrumental upgrade of the telescope since observations began in 1981. It has made possible the nightly observation of fields with area ~5 square degrees, while retaining the operating frequency of 843 MHz and the pre-existing sensitivity to point sources and extended structure. The MOST will now be used to make a sensitive (rms approximately 1 mJy/beam) imaging survey of the sky south of declination -30&deg. This survey consists of two components: an extragalactic survey, which will begin in the south polar region, and a Galactic survey of latitudes |b| &lt 10&deg. These are expected to take about ten years. The upgrade has necessitated the installation of 352 new preamplifiers and phasing circuits which are controlled by 88 distributed microcontrollers, networked using optic fibre. The thesis documents the upgrade and describes the new systems, including associated testing, installation and commissioning. The thesis continues by presenting a new high-resolution radio continuum survey of the Vela supernova remnant (SNR), made with the MOST before the completion of the Wide Field upgrade. This remnant is the closest and one of the brightest SNRs. The contrast between the structures in the central pulsar-powered nebula and the synchrotron radiation shell allows the remnant to be identified morphologically as a member of the composite class. The data are the first of a composite remnant at spatial scales comparable with those available for the Cygnus Loop and the Crab Nebula, and make possible a comparison of radio, optical and soft X-ray emission from the resolved shell filaments. The survey covers an area of 50 square degrees at a resolution of 43&quot x 60&quot, while imaging structures on scales up to 30'. It has been used for comparison with Wide Field observations to evaluate the performance of the upgraded MOST. The central plerion of the Vela SNR (Vela X) contains a network of complex filamentary structures. The validity of the imaging of these filaments has been confirmed with Very Large Array (VLA) observations at 1.4 GHz. Unlike the situation in the Crab Nebula, the filaments are not well correlated with H-alpha emission. Within a few parsec of the Vela pulsar the emission is much more complex than previously seen: both very sharp edges and more diffuse emission are present. It has been postulated that one of the brightest filaments in Vela X is associated with the X-ray feature (called a `jet') which appears to be emanating from the region of the pulsar. However, an analysis of the MOST and VLA data shows that this radio filament has a flat spectral index similar to another more distant filament within the plerion, indicating that it is probably unrelated to the X-ray feature.

Esta dissertação pretende encontrar as matrizes do conceito de antropofagia do modernista Oswald de Andrade, tal como ele foi formulado no Manifesto Antropófago de 1928 e em obras posteriores, tais quais a peça O Rei da Vela (1933) e a tese de filosofia A Crise da Filosofia Messiânica (1950), a partir de uma reflexão que busca dar conta dos processos alterativos de constituição de identidades em países periféricos. Oswald de Andrade foi autor de muitas das mais audaciosas experiências de vanguarda na América Latina e seus escritos seguem iluminando a história do Brasil desde então. Nesta chave, essa dissertação pretende também problematizar a articulação complexa entre a arte modernista e a história política e cultural do país, através da releitura da obra de Oswald de Andrade urdida pelo movimento tropicalista nos anos de 1970 e assim como é lida atualmente. / This dissertation seeks to find the matrixes of the concept of anthropophagy created by the modernist Oswald de Andrade, as it was formulated in the Manifesto Antropófago of 1928 and later works, such as the play O Rei da Vela (1933) and the philosophical thesis A Crise da Filosofia Messiânica (1950), from the standpoint of a line of thinking which seeks to analyse the alterative processes of identity formation in peripheral countries. Oswald de Andrade was the author of many of the most audacious avant-guard experiences in Latin America and his writings enlighten Brazil´s history ever since. Following this problematic, this dissertation aims also to understand, through the reading of the works of Oswald de Andrade which was developed by the tropicalist movement in the 1970´s, as well as its contemporary reception, the complex articulation of modernist art and the cultural and political history of the country.

Esta pesquisa lança seu olhar para os fundamentos de um fenômeno que caminha com a humanidade: o Velejar. Mesmo com o desenvolvimento de tantas tecnologias que propiciam tipos de navegação variados, o uso da vela continua atual, seja como transporte, como brincadeira ou como esporte. O fenômeno, entretanto, extrapola sua utilidade: nitidamente velejar, para os velejadores, é mais do que atravessar o meio líquido utilizando a força do vento. Os velejadores - aqui sujeitos da experiência - dão significados à prática e fazem dela algo para a qual vale a pena retornar. Para investigar estes significados e sentidos, esta pesquisa busca colocar em palavras o que há de especial na prática de velejar a partir da perspectiva dos próprios velejadores. É por meio de uma ampla pesquisa de campo - onde se convive, veleja e dialoga com velejadores esportistas, velejadores pescadores artesanais e velejadores expedicionistas que se identificam elementos recorrentes e significativos para os que a praticam. Junto a esses elementos, foram agregadas as próprias experiências da autora, velejadora esportista. Com registro de imagens, entrevistas e descrições do vivido, as análises ancoram-se no arcabouço da fenomenologia da imaginação material de Gaston Bachelard, desvelando os gestos, os fascínios, as provocações e as diferentes sensibilidades presentes nessa modalidade tão antiga quanto atual. Competição e contemplação, aventura e passeio, tradição e modernidade, ritos iniciáticos e formativos, elementos materiais e suas provocações, entre outros, unem-se no propósito de desvendar uma prática que se revela complexa e inteira e que tem alto poder de aderência e manutenção presentes nas ressonâncias simbólicas. O sonho de habitar as águas e dominar o vento, de maneira íntima e próxima a partir de uma vela e um casco, é deste modo, constantemente atualizado no corpo dos velejadores / This research eyes on the foundations of a phenomenon that goes forward together with humanity: the Sailing. Despite the technology development, which provides many navigation forms, the sailing remains actual, whether as transportation, as a hobby or as a sport. The Sailing extrapolates its utility. For the sailor\'s point of view, the sailing is clearly more than just crossing a liquid environment using the wind force. The sailors, who is the experience subject, assign meaning to the practice of sailing and make it something that is worth returning to. To investigate these meanings and senses, this research seeks to put into words what is special in the practice of sailing from the sailors perspective. Through an extensive field research, where I could live, practice and interact with other sailing athletes, artisanal fishermen, and expeditionist sailors, I identified recurring and significant elements for those who practice the Sailing. Along with these elements, my experience as a sailor has also been added to this research. Using pictures, interviews, and descriptions of different experiences, the analysis of this work is anchored in the framework of Gaston Bachelard\'s phenomenology of material imagination, revealing from the reports, the gestures, the fascinations, the provocations, and the different sensibilities present in this modality which is as ancient as it is actual. Competition and contemplation, adventure and tour, tradition and modernity, initiatory and formative rites, material elements and their provocations, among others, unite in the purpose of unveiling a practice that turns out to be complex. The dream of live in the water and dominate the wind using a sail and a hull is constantly updated in the body of the sailors in a closely and intimately way

Made available in DSpace on 2016-12-06T17:07:20Z (GMT). No. of bitstreams: 1 Ricardo Brandt.pdf: 781933 bytes, checksum: 509321a63f72caaf08d7623e963701f6 (MD5) Previous issue date: 2008-08-21 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Mood states in levels considered adjusted contribute excessively for the best sport income. The objective of the research was to characterize the athletes of the Brazilian National Sailing Team and to evaluate the mood states during the Panamerican Games. This is a descriptive correlacional research that used as instruments the "Questionnaire of characterization, auto-evaluation of the life style, faith spirituality" of Andrade (2001) and the "Brazilian Scale of Mood (BRAMS)" of Rohlfs (2004). The study was made during the Panamerican Games with athletes of the Brazilian National Sailing Team. The collections of the data was made in the Hotel where the athletes were lodged, before and after the regattas and in the place of the competition, after the regattas. Six athletes participated of the study (five men and a woman) by convenience or accessibility, between 19 and 39 years ( x =25 ±3,1) that had competed in different classrooms in the sail (Hob Cat 16, Snipe, feminine masculine Rs:X and, Sunfish and J-24). The results demonstrate that the majority of the athletes presents excellent health, good quality of sleep and rest. The majority of the athletes are Jewish and catholics and believe a little in the aid of a superior being in the solutions of problems, recovery of illness or injury as well as in the sport income. In general way the athletes had presented good mood condition during the competition and the main alterations had been in the levels of anger and tension that, from empirical evidences, is considered that these variable in raised levels, can contribute positively in the sport income and are evident that better quality of sleep has relation with more positive states of mood. We concluded that the mood profile of the athletes of the Brazilian National Sailing Team during the Panamerican Games consists in high levels of vigor and low of fatigue, associates to moderate levels of tension, depression, confusion and extremely raised of anger. To understand better the mood states it is necessary to know deeply the athlete all and the context that surrounds him. / Estados de humor em níveis considerados adequados contribuem sobremaneira para o melhor rendimento esportivo. O objetivo da pesquisa foi caracterizar os atletas da seleção brasileira de vela e avaliar os estados de humor durante os Jogos Pan-americanos. Trata-se de uma pesquisa descritiva do tipo correlacional que utilizou como instrumentos o Questionário de caracterização geral dos atletas de alto rendimento na vela adaptado de Andrade (2001) e a Escala Brasileira de Humor (BRAMS) de Rohlfs (2004). O estudo foi realizado durante os Jogos Pan-americanos com atletas da seleção brasileira de vela. As coletas de dados foram realizadas no Hotel onde os atletas estavam hospedados (pré-regatas) e no local da competição (pós-regatas). Participaram seis atletas (cinco homens e uma mulher) por conveniência ou acessibilidade, entre 19 e 39 anos ( x =25 ±3,1) que competiram em diferentes classes na vela (Hob Cat 16, Snipe, Rs:X masculino e feminina, Sunfish e J-24). Os resultados demonstram que a maioria dos atletas apresenta excelente saúde, boa qualidade do sono, descanso e repouso. Em sua maioria os atletas são católicos e judaicos e crêem pouco na ajuda de um ser superior nas soluções de problemas, recuperação de doença ou lesão bem como no rendimento esportivo. De maneira geral os atletas apresentaram bom estados de humor durante a competição e as principais alterações foram nos níveis de raiva e tensão que a partir de evidências empíricas é considerado que essas variáveis em níveis elevados, podem contribuir positivamente no rendimento esportivo e fica evidente que melhor qualidade do sono tem relação com estados de humor mais positivos. Conclui-se que o perfil de humor dos atletas da seleção brasileira de vela durante os Jogos Pan-americanos constitui-se em níveis elevados de vigor e baixos de fadiga, associados a níveis moderados de tensão, depressão, confusão e extremamente elevados de raiva. Para melhor compreender os estados de humor é necessário conhecer profundamente o atleta e todo o contexto que o cercam.