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Future NASA plans to launch large space strucutres solicit the need for effective vibration control schemes which can solve the unique problems associated with unwanted residual vibration in flexible spacecraft. In this work, a unique method of input command shaping called impulse shaping is examined. A theoretical background is presented along with some insight into the methdos of calculating multiple mode sequences. The Middeck Active Control Experiment (MACE) is then described as the testbed for hardware experiments. These results are shown and some of the difficulties of dealing with nonlinearities are discussed. The paper is concluded with some conclusions about calculating and implementing impulse shaping in complex nonlinear systems.

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Made available in DSpace on 2014-06-12T23:14:52Z (GMT). No. of bitstreams: 2 arquivo6590_1.pdf: 4689974 bytes, checksum: 60df8508cb5a4c82b137ee4b188152c5 (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2011 / A incontinência urinária e fecal representa importante situação de saúde que afeta diretamente a qualidade de vida dos adolescentes que as possui. As principais motivações para a escolha do tema desta pesquisa foram: o limitado número de profissionais Estomaterapeutas interessados em atuar na área de incontinência; a escassez de estudos acerca do tema; a reduzida oferta de serviços em saúde especializados, interdisciplinares e voltados ao atendimento de pacientes portadores de incontinências; a precariedade comumente encontrada nesses serviços e que, de um modo geral, não possuem estrutura física adequada, recursos humanos e fomentos suficientes para alicerçar a assistência à saúde desse público. A partir disso sucedeu-se a delimitação do problema e a realização desta pesquisa que está estruturada em duas partes. A primeira consta do artigo Qualidade de vida de adolescentes incontinentes: revisão integrativa da literatura , realizada a partir das bases de dados LILACS, MEDLINE e Cochrane, no período de janeiro de 2001 a março de 2011. Foram utilizados para busca os descritores qualidade de vida, adolescente, criança, estomia e enema, e as palavras MACE (Malone antegrade continence enema), Malone, bexiga e incontinência, cuja seleção da amostra foi composta por oito artigos. Os resultados demonstraram que as pesquisas com adolescentes incontinentes ainda são incipientes e heterogêneas, sendo pouco comuns os estudos que abranjam exclusivamente este público. A segunda parte corresponde ao artigo original Qualidade de vida de adolescentes submetidos à ampliação vesical e à cirurgia de Malone que objetivou descrever a qualidade de vida de adolescentes incontinentes submetidos a estas cirurgias. O estudo descritivo com abordagem quantitativa foi realizado no ambulatório de cirurgia e urologia pediátrica do Hospital Infantil Maria Lucinda, e investigou os adolescentes de 10 a 18 anos com incontinência urinária e/ou fecal, submetidos à ampliação vesical e à cirurgia de Malone, concomitantemente ou não, totalizando 35 participantes. Os dados foram coletados através de entrevista presencial após consentimento do adolescente e de seu responsável, e foram utilizados dois instrumentos: o questionário estruturado sociodemográfico e o questionário genérico autoadministrado de qualidade de vida, o Pediatrics Quality of Life InventotyTM Version 4.0 (PedsQLTM). O banco de dados foi criado no programa EPI-INFO 6.04, bem como as análises estatísticas que foram expressas pelas médias dos escores das dimensões física e psicossocial e escore total. Os resultados mostraram que a qualidade de vida relacionada à saúde dos adolescentes incontinentes, de um modo geral foi positiva e demonstrou que a ampliação vesical e a cirurgia de Malone contribuem para minimizar os efeitos negativos da incontinência urinária e fecal sobre as dimensões física e psicossocial

The considerable interest in nanomaterials and nanotechnology over the last decade is attributed to Industry's desire for lower cost, more sophisticated devices and the opportunity that nanotechnology presents for scientists to explore the fundamental properties of nature at near atomic levels. In pursuit of these goals, researchers around the world have worked to both perfect existing technologies and also develop new nano-fabrication methods; however, no technique exists that is capable of producing complex, 2D and 3D nano-sized features of arbitrary shape, with smooth walls, and at low cost. This in part is due to two important limitations of current nanofabrication methods. First, 3D geometry is difficult if not impossible to fabricate, often requiring multiple lithography steps that are both expensive and do not scale well to industrial level fabrication requirements. Second, as feature sizes shrink into the nano-domain, it becomes increasingly difficult to accurately maintain those features over large depths and heights. The ability to produce these structures affordably and with high precision is critically important to a number of existing and emerging technologies such as metamaterials, nano-fluidics, nano-imprint lithography, and more. Summary To overcome these limitations, this study developed a novel and efficient method to etch complex 2D and 3D geometry in silicon with controllable sub-micron to nano-sized features with aspect ratios in excess of 500:1. This study utilized Metal-assisted Chemical Etching (MaCE) of silicon in conjunction with shape-controlled catalysts to fabricate structures such as 3D cycloids, spirals, sloping channels, and out-of-plane rotational structures. This study focused on taking MaCE from a method to fabricate small pores and silicon nanowires using metal catalyst nanoparticles and discontinuous thin films, to a powerful etching technology that utilizes shaped catalysts to fabricate complex, 3D geometry using a single lithography/etch cycle. The effect of catalyst geometry, etchant composition, and external pinning structures was examined to establish how etching path can be controlled through catalyst shape. The ability to control the rotation angle for out-of-plane rotational structures was established to show a linear dependence on catalyst arm length and an inverse relationship with arm width. A plastic deformation model of these structures established a minimum pressure gradient across the catalyst of 0.4 - 0.6 MPa. To establish the cause of catalyst motion in MaCE, the pressure gradient data was combined with force-displacement curves and results from specialized EBL patterns to show that DVLO encompassed forces are the most likely cause of catalyst motion. Lastly, MaCE fabricated templates were combined with electroless deposition of Pd to demonstrate the bottom-up filling of MaCE with sub-20 nm feature resolution. These structures were also used to establish the relationship between rotation angle of spiraling star-shaped catalysts and their center core diameter. Summary In summary, a new method to fabricate 3D nanostructures by top-down etching and bottom-up filling was established along with control over etching path, rotation angle, and etch depth. Out-of-plane rotational catalysts were designed and a new model for catalyst motion proposed. This research is expected to further the advancement of MaCE as platform for 3D nanofabrication with potential applications in thru-silicon-vias, photonics, nano-imprint lithography, and more.

Submitted by Geyciane Santos (geyciane_thamires@hotmail.com) on 2015-07-23T13:37:24Z No. of bitstreams: 1 Dissertação - Volnei da Silva Klehm.pdf: 16125840 bytes, checksum: c35ee4884abb69923aca15bc534eb348 (MD5) / Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2015-07-23T15:43:55Z (GMT) No. of bitstreams: 1 Dissertação - Volnei da Silva Klehm.pdf: 16125840 bytes, checksum: c35ee4884abb69923aca15bc534eb348 (MD5) / Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2015-07-23T15:41:48Z (GMT) No. of bitstreams: 1 Dissertação - Volnei da Silva Klehm.pdf: 16125840 bytes, checksum: c35ee4884abb69923aca15bc534eb348 (MD5) / Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2015-07-23T15:46:34Z (GMT) No. of bitstreams: 1 Dissertação - Volnei da Silva Klehm.pdf: 16125840 bytes, checksum: c35ee4884abb69923aca15bc534eb348 (MD5) / Made available in DSpace on 2015-07-23T15:46:34Z (GMT). No. of bitstreams: 1 Dissertação - Volnei da Silva Klehm.pdf: 16125840 bytes, checksum: c35ee4884abb69923aca15bc534eb348 (MD5) Previous issue date: 2013-07-10 / Não informada / Naturally, patterns that we wish to recognize occurs in several manners. As example, considering the ordinary human iris, it is often to this pattern to manifest different aspects. When acquired one iris can present, in relation to the original pattern, rotation, translation, lighting distortions or mixed noise. Thus, in some cases, it is necessary to the recognition method to have versatility enough to identify such unexpected forms of pattern occurrences that we wish to recognize. In our particular case, filters for correlation with broader flexibility than the standard SDF and MACE filters, for example, are necessary. A consolidated way to express the variation of a data set can be obtained using the method of Principal Component Analysis (PCA) [1, 2]. The PCA optimally represents a dataset and this fact makes it interesting for combination among ordinary correlation filter design and one possible approach consists of the modification of the design of correlation filters to use principal components as their own detection target. In this dissertation, it is proposed to modify the design of correlation filters SDF and MACE to use Principal Component Analysis to represent the set of occurrences of the pattern of interest. One benefit of this approach resides in the fact that PCA incorporate the changes in the set data providing as a result, more flexible filters. Thus, filters designed in this way would succeed in detecting patterns with small distortions translations and rotations. To validate the proposed method, a recognition system that uses the default human iris was designed and, for this purpose, one consolidate database is used. / Naturalmente, os padrões os quais desejamos reconhecer, ocorrem nas mais diversas formas. Por exemplo, supondo como padrão a íris humana, é natural que este padrão seja adquirido de algumas maneiras possíveis. Quando adquirida a íris pode estar, em relação ao padrão original, com rotação, translação, com efeitos de iluminação ou misturadas a ruídos. Dessa forma, em alguns casos, é necessário que o método de reconhecimento tenha versatilidade suficiente para identificar tais formas não esperadas da ocorrência do padrão os quais desejamos reconhecer. Em nosso caso particular, por exemplo, precisamos de filtros de correlação com flexibilidade mais ampla que os filtros SDF e MACE. Uma forma consolidada de expressar a variação de um conjunto de dados pode ser obtida utilizando-se o método por Análise de Componentes Principais (PCA) [1, 2]. A PCA representa de forma ótima um conjunto de dados e esse fato a torna interessante para combinação com o projeto de filtros e uma possível abordagem consiste em sua modificação para que as próprias componentes principais sejam usadas como padrões alvo. Nesta dissertação, é proposta a modificação do projeto de filtros de correlação SDF e MACE de modo a se utilizar a Análise de Componentes Principais para representar o conjunto das ocorrências do padrão de interesse. Um dos benefícios desta abordagem, reside no fato da PCA incorporar as variações presentes no conjunto de dados proporcionando, como resultado, filtros mais flexíveis. Assim, filtros projetados desta forma teriam sucesso na detecção de padrões com pequenas distorções, translações e rotações. Para validar o método proposto, projetamos um sistema de reconhecimento que utiliza como padrão a íris humana e, para tal, uma base de dados consolidada é utilizada.

Non-destructive imaging modalities for evaluating the internal properties of materials can be formulated as physics-driven inverse problems. Model-based Iterative reconstruction (MBIR) methods that integrate a forward model of the imaging system and a prior model of the object being imaged can provide superior reconstruction quality relative to conventional methods. However, making MBIR feasible for practical applications faces two key challenges. First, we require efficient computational methods for MBIR that allow large-scale reconstructions in real-time. Second, we must develop forward models that accurately capture the physics and geometry of the imaging system, and, support the use of advanced denoisers that enhance image quality as prior models.<br><br>This thesis attempts to address the aforementioned challenges and is divided into three main chapters, each corresponding to a different inverse imaging application. <br><br>In the first chapter of this thesis, we propose a novel 4D model-based iterative reconstruction (MBIR) algorithm for low-angle coherent-scatter X-ray Diffraction (XRD) tomography that can substantially increase the SNR. Our forward model is based on a Poisson photon counting model that incorporates a spatial point-spread function, detector energy response and energy-dependent attenuation correction. Our prior model uses a Markov random field (MRF) together with a reduced spectral bases set determined using non-negative matrix factorization. Our algorithm efficiently computes the Bayesian estimate by exploiting the sparsity of the measurement data. We demonstrate the ability of our method to achieve sufficient spatial resolution from sparse photon-starved measurements and also discriminate between materials of similar densities with real datasets.<br><br>In the second chapter of this thesis, we propose a multi-agent consensus equilibrium (MACE) algorithm for distributing both the computation and memory of <br>MBIR for Computed Tomographic (CT) reconstruction across a large number of parallel nodes. In MACE, each node stores only a sparse subset of views and a small portion of the system matrix, and each parallel node performs a local sparse-view reconstruction, which based on repeated feedback from other nodes, converges to the global optimum. Our distributed approach can also incorporate advanced denoisers as priors to enhance reconstruction quality. In this case, we obtain a parallel solution to the serial framework of Plug-n-play (PnP) priors, which we call MACE-PnP. In order to make MACE practical, we introduce a partial update method that eliminates nested iterations and prove that it converges to the same global solution. Finally, we validate our approach on a distributed memory system with real CT data. We also demonstrate an implementation of our approach on a massive supercomputer that can perform large-scale reconstruction in real-time. <br><br>In the third chapter of this thesis, we propose a method that makes MBIR feasible for real-time single-shot holographic imaging through deep turbulence. Our method uses surrogate optimization techniques to simplify and speedup the reflectance and phase-error updates in MBIR. Further, our method accelerates computation of the surrogate-updates by leveraging cache-prefetching and SIMD vector processing units on a single CPU core. We analyze the convergence and real CPU time of our method using simulated datasets, and demonstrate its dramatic speedup over the original MBIR approach. <br>

Canada 150, or the sesquicentennial anniversary of Confederation, celebrates a nation-state that can be described as “settler colonial” in relation to Indigenous peoples. This thesis brings a Critical Religion and Critical Discourse Analysis methodology into conversation with Settler Colonial and Indigenous Studies to ask: how is Canadian settler colonial sovereignty enacted, and how do Indigenous peoples perform challenges to that sovereignty? The parliamentary mace and the eagle feather are conceptualized as emblematic and condensed metaphors, or metonyms, that assert and represent Canadian and Indigenous sovereignties. As a settler colonial sovereignty, established and naturalized partially through discourses on religion, Canadian sovereignty requires the displacement of Indigenous sovereignty. In events from 1990 to 2017, Indigenous people wielding eagle feathers disrupt Canadian governance and challenge the legitimacy of Canadian sovereignty. Indigenous sovereignty is (re)asserted as identity-based, oppositional, and spiritualized. Discourses on Indigenous sovereignty and spirituality provide categories and concepts through which Indigenous resistance occurs within Canada.

Les Mamlûks sont réputés pour avoir porté les arts de la furūsiyya à leur plus haute expression. Cette thèse a pour objectif de cerner à la fois les enjeux de leur dextérité, et ses caractéristiques. La première partie porte sur la littérature de la furūsiyya. Après un bilan historiographique, plusieurs ouvrages de furūsiyya sont analysés et comparés, afin de mieux appréhender les héritages et les apports proprement mamlûks. Un traité anonyme de maniement de dabbūs et de lutte à cheval, contenant également une partie sur les feux de guerre, est édité et traduit. La deuxième partie de cette thèse porte sur la suprématie militaire des Mamlûks. Leur formation très poussée y est décrite, mais la lumière a aussi été mise sur leurs chevaux : leurs races ; leur dressage ; leur nombre ; leur entretien. Un large échantillon d'armes mamlûkes est présenté. Enfin, un chapitre est consacré au problème des procédés de combat, encore très mal connus, qui tend à nuancer la vision d'archers montés que l'on a généralement des Mamlûks. Enfin, la dernière partie relève de l'histoire sociale. Elle a pour ambition de démontrer que la maîtrise de la furūsiyya était perçue par les Mamlûks comme la détention d'un art complexe, un « attribut de distinction » qui les distinguait du vulgum pecus. Ce sont alors les diverses manifestations de cette appartenance sociale qui sont analysées : les « sports » équestres, les lieux de jeu et d'entraînement militaire et les palais-écuries, enfin les institutions et les spectacles.Les annexes contiennent un tableau détaillé des manuscrits de furūsiyya et un glossaire, en plus de quelques planches. / The Mamluks are renowned for bringing the arts of furūsiyya to their highest expression. This thesis aims to identify both the issues of their dexterity, and characteristics.The first part focuses on the literature of furūsiyya. After a historiographical balance, several treatises of furūsiyya are analyzed and compared in order to better understand the legacy and contributions properly Mamluk. An anonymous treatise of handling dabbūs and fight on horseback, also containing some of the fires of war, is edited and translated.The second part of this thesis is on their military supremacy.Their extensive training is described, but the light was also put on their horses : races, training, numbers and maintenance. A wide selection of Mamluk weapons is presented. Finally, a chapter is devoted to the problem of combat methods, very little known, which tends to moderate vision of mounted archers that is generally widespread.The last part focus on social history. It aims to demonstrate that furūsiyya mastery was seen by the Mamluks as the knowledge of a complex art, an "attribute of distinction", which distinguished them from the hoi polloi. Then, the various manifestations of belonging to this social class are analyzed: "sports" riding, gambling venues and military training, and palace-stables, and finally the institutions and the shows.The appendices contain a detailed table of manuscripts of furūsiyya, a glossary and a few plates.