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Dhanens, Niles Fortner James. "Module cover conductivity enhancement : senior project, final report /." Click here to view, 2009. http://digitalcommons.calpoly.edu/mesp/4/.
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Bergmeier, Georg Fischaleck Manuel Fischer Stefan Neunuebel Colin Sorenson Bjorn Vandenhoek Lazer. "Final design report : hand-drive rear wheel drive wheelchair project /." Click here to view, 2009. http://digitalcommons.calpoly.edu/mesp/1/.
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Thesis (B.S.)--California Polytechnic State University, 2009.Project advisor: Sarah Harding. "Joint effort - California Polytechnic State University, San Luis Obispo and Hochschule München, School of Applied Sciences." "Georg Bergmeier, Manuel Fischaleck, Stefan Fischer, Colin Neunuebel, Bjorn Sorenson, Lazer Vandenhoek." Title from PDF title page; viewed on Dec. 10, 2009. Includes bibliographical references.
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Hauge, John Hutcheson Drew Scott Paul. "Boundary layer data system (BLDS) heating system : final project report /." Click here to view, 2009. http://digitalcommons.calpoly.edu/mesp/2/.
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Cook, Justin Jones Ben Reynolds Sean. "Callaway Golf : variable curved impulse sealer /." Click here to view, 2009. http://digitalcommons.calpoly.edu/mesp/3/.
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Brown, Nathaniel Marc Knorr Matthew Thomas. "Hydraulic hand press final project report /." Click here to view, 2009. http://digitalcommons.calpoly.edu/mesp/5.
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Thesis (B.S.)--California Polytechnic State University, 2009.Project advisor: M.L. McFarland. Title from PDF title page; viewed on Jan. 12, 2010. Includes bibliographical references. Also available on microfiche.
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Gage, Katherine Highstreet Matt Del Cid Liz. "Two-material cylinder stress response software /." Click here to view, 2009. http://digitalcommons.calpoly.edu/mesp/6.
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Thesis (B.S.)--California Polytechnic State University, 2009.Project advisor: Lee McFarland. Title from PDF title page; viewed on Jan. 13, 2010. Includes bibliographical references. Also available on microfiche.
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Allan, John S. Nekimken Kyle J. Weills Spencer B. "Pump sequencing optimization /." Click here to view, 2009. http://digitalcommons.calpoly.edu/mesp/7.
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Thesis (B.S.)--California Polytechnic State University, 2009.Project advisor: Tom Mase. Title from PDF title page; viewed on Jan. 13, 2010. Includes bibliographical references. Also available on microfiche.
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Bautista, Garret Hardin Chad Taylor Ben. "Best-in-class global bumper reinforcement beam /." Click here to view, 2009. http://digitalcommons.calpoly.edu/mesp/8.
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Thesis (B.S.)--California Polytechnic State University, 2009.Project advisor: John Fabijanic. Title from PDF title page; viewed on Jan. 20, 2010. Includes bibliographical references. Also available on microfiche.
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Allport, Andrew Braico Kevin Charles Kevin Kyi George Lai William. "Supermileage team : urban concept competition vehicle chassis design report /." Click here to view, 2009. http://digitalcommons.calpoly.edu/mesp/11.
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Thesis (B.S.)--California Polytechnic State University, 2009.Project advisor: John Fabijanic. Title from PDF title page; viewed on Jan. 20, 2010. Includes bibliographical references. Also available on microfiche.
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Barkley, Clayde Betts Mikel Olay Anthony. "Indirect pipe pressure measurement /." Click here to view, 2009. http://digitalcommons.calpoly.edu/mesp/12.
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Thesis (B.S.)--California Polytechnic State University, 2009.Project advisor: Jim Meagher. Title from PDF title page; viewed on Jan. 20, 2010. Includes bibliographical references. Also available on microfiche.
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Mori, Brett Cote John Rowland Kyle Wells Micah. "Chip removal tool project /." Click here to view, 2009. http://digitalcommons.calpoly.edu/mesp/9.
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Thesis (B.S.)--California Polytechnic State University, 2009.Project advisor: James Meagher. Title from PDF title page; viewed on Jan. 20, 2010. Includes bibliographical references. Also available on microfiche.
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Caulk, Abraham Bruno Whipp Kevin. "Air cooling for AECM module, final project report /." Click here to view, 2009. http://digitalcommons.calpoly.edu/mesp/10.
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Thesis (B.S.)--California Polytechnic State University, 2009.Project advisor: Sarah Harding. Title from PDF title page; viewed on Jan. 20, 2010. Includes bibliographical references. Also available on microfiche.
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Roundsevell, Jared Shubert Claire Snitowsky Matt Wong Andy. "Harvesting human exercise power at the Cal Poly Rec Center exercise bike power generator II /." Click here to view, 2009. http://digitalcommons.calpoly.edu/mesp/13/.
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Thesis (B.S.)--California Polytechnic State University, 2009.Project advisor: John Fabijanic. Title from PDF title page; viewed on Feb. 2, 2010. Includes bibliographical references. Also available on microfiche.
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Stamm, Sean Salguero Walter Gomez Jr Felipe Duen̋as Ruben. "Broccoli floret cutter Gold Coast Packaging, Inc. /." Click here to view, 2009. http://digitalcommons.calpoly.edu/mesp/14/.
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Thesis (B.S.)--California Polytechnic State University, 2009.Project advisor: James M. Meagher. Title from PDF title page; viewed on Feb. 2, 2010. Includes bibliographical references. Also available on microfiche.
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Brower, August Iraeta Amber Sy Jason. "The magic ATM." Click here to view, 2009. http://digitalcommons.calpoly.edu/mesp/15/.
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Thesis (B.S.)--California Polytechnic State University, 2009.Project advisor: Louis Rosenberg. Title from PDF title page; viewed on Mar. 11, 2010. Includes bibliographical references. Also available on microfiche.
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Souza, Daniel Gordilho. "Estudo da flambagem local da mesa de perfis I com alma senoidal via análise não linear pelo MEF." Universidade Federal de Minas Gerais, 2006. http://hdl.handle.net/1843/PASA-7RQHJB.
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Flange local buckling of sinusoidal web I girders is investigated in this study. As a first step, pre-processors for ANSYS 9.0 are created, using the software parametric design language, for the non-linear numerical analysis of plane web and sinusoidal web I girders. A group of plane webs I girders is analyzed and the non-linear analysis parameters arecalibrated in order to get results consistent with the ones obtained by the Brazilian steel code, NBR8800 (under revision - sept/2006), design procedures. Using the pre-processors for sinusoidal web models and the non-linear analysis parameters calibrated in the plane web models, a parametric investigation is carried out, considering the application range of sinusoidal webs I girders. The numerical results obtained are compared to the ultimate capacity proposed by two different procedures as such: the NBR 8800 design process for plane web I girders and the sinusoidal web I girders design procedure used by the Austrianindustry Zeman, adapted to the NBR8800. It is verified that the Zeman design procedure, adapted do the NBR8800, is conservative. The NBR8800 design process, considering kc=0,763 as flange buckling coefficient, is consistent for the inelastic range and conservative for the elastic range. As a result of this study, a design procedure is proposed,based in the NBR 8800 design process, adapting the curve of the elastic range in order to attend the numerical results.No presente trabalho investigou-se a flambagem local da mesa em perfis I de alma senoidal. Em uma primeira etapa, criaram-se pré-processadores no ANSYS 9.0, utilizandose a linguagem paramétrica do programa, para análise numérica não-linear de perfis I de alma plana e de alma senoidal. Analisou-se um grupo de perfis de alma plana e calibraramse os parâmetros da análise não-linear de forma a obter resultados numéricos consistentes com aqueles obtidos pelo processo de cálculo do projeto de revisão da NBR8800 (Set/2006). Utilizando-se os pré-processadores para perfis de alma senoidal e os parâmetros da análise não-linear calibrados nos modelos de alma plana, realizou-se um estudo paramétrico abrangendo geometrias associadas à faixa de aplicação dos perfis de alma senoidal. Os resultados numéricos obtidos foram comparados com os valores de resistência última obtidos por outros dois procedimentos: o processo de cálculo da NBR8800 para verificação de perfis I de alma plana e a proposta de dimensionamento de perfis de alma senoidal da fabricante austríaca Zeman, adaptado para a NBR8800. Observou-se que o procedimento da Zeman, adaptado para a NBR8800, é conservador. O procedimento da NBR8800, considerando kc=0,763 como coeficiente de flambagem da mesa, é consistente para o regime inelástico de flambagem da mesa e conservador para o regime elástico. Como resultado deste estudo, propõe-se um procedimento baseado no projeto de revisão da NBR 8800, adaptando-se a curva de verificação do regime elástico, de forma a atender aos resultados numéricos.
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Aratani, Naoki. "Chemistry of meso-meso linked porphyrin arrays." 京都大学 (Kyoto University), 2005. http://hdl.handle.net/2433/73207.
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Kelley, Michelle D. "The Mesh." Case Western Reserve University School of Graduate Studies / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=case1607937098137847.
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Timilsina, Manish. "Comparision between single mesh network and cell-based mesh network." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Data- och elektroteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-17636.
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The theme of this thesis is to analyse the performance of a conventional mesh topology in a multipath fading environment and compare it with a newly proposed multiple cell based mesh topology. The communication performance in general is measured by the overall through-put, packets delivery reliability, average message delivery delay and power-consumption. In this thesis, for simplicity of the calculation the network performance is indirectly measured in-terms of the number of additional routes originally required to connect an isolated or disconnected device, percentage of the devices which have reliable and unreliable route from or to the back bone routers, number of hops from back-bone routers to the nodes and redundant routes which includes the routes inside the particular cell or outside to the other cell. In this simulation 240 nodes has been used within the area of 120 x 60 m2 which is just in accordance with an average size of industry. Network simulation is broken down into five different scenarios with respect to different number of field devices or nodes and back bone routers along with the presence of obstacles in the area and then analysed respectively. Entire simulation and analytical work have been done on MATLAB. Major applications of multiple cell based mesh topology can be used within industrial process automation, such as pulp and paper, steel, oil and gas, etc.
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Damle, Ameya. "Hybrid routing with periodic mesh updates in wireless mesh networks." Ann Arbor, Mich. : ProQuest, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1432319.
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Thesis (M.S. in Electrical Engineering)--S.M.U.Title from PDF title page (viewed May 23, 2007). Source: Masters Abstracts International, Volume: 44-04, page: 1923. Adviser: Dinesh Rajan. Includes bibliographical references.
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Bushrod, Rebecca. "Unstructured mesh generation for mesh improvement techniques and contour meshing." Thesis, Swansea University, 2005. https://cronfa.swan.ac.uk/Record/cronfa42434.
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This thesis will investigate surface mesh generation and develop ideas to improve the quality of surface meshes that are currently produced. Surface geometries are represented by a CAD definition, but the CAD definition does not necessarily guarantee that the surface geometry is acceptable for mesh generation. CAD geometries will often contain a number of detailed features which will need to be improved by processes such as CAD repair before mesh generation can take place. Even then the geometries can still contain problems in the features such as, small sliver surface patches and sliver edges. These features cause major difficulties when meshed, as they generate small distorted elements. Here we will look to improve the meshes by merging together neighboring surface patches to create a super patch and then generate the mesh on this one surface. The merging of surfaces is controlled by the angle between surface patches. Another method that will be investigated involves the re-meshing of the geometry based on a prescribed metric. In addition to looking at this problem of CAD representation we will also look at the growing area of medical imaging. Here we will look to produce a 3D mesh from a set of contours. From this the mesh produced will be remeshed using the previous ideas to produce a mesh that can be used for analysis.
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Munaretti, Rodrigo Barni. "Perceptual guidance in mesh processing and rendering using mesh saliency." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2007. http://hdl.handle.net/10183/12673.
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Considerações de informação perceptual têm ganhado espaço rapidamente em pesquisas referentes a representação, análise e exibição de malhas. Estudos com usuários, eye tracking e outras técnicas são capazes de fornecer informações cada vez mais úteis para sistemas voltados a usuário, que formam a maioria das aplicações em computação gráfica. Neste trabalho nós expandimos sobre o conceito de Saliência de Malhas — uma medida automática de importância visual para malhas de triângulos baseada em modelos de atenção humana em baixo nível — melhorando, extendendo e realizando integração com diferentes aplicações. Nós extendemos o conceito de Saliência de Malhas para englobar objetos deformáveis, mostrando como um mapa de saliência em nível de vértice pode ser construído capturando corretamente regiões de alta importância perceptual através de um conjunto de poses ou deformações. Nós definimos saliência multi-pose como um agregado multi-escala de valores de curvatura sobre uma vizinhança localmente estável, em conjunto com deformações desta vizinhança em múltiplas poses. Nós substituímos distância Euclideana por geodésica, assim fornecendo melhores estimativas de vizinhança local. Resultados mostram que saliência multi-pose gera resultados visualmente mais interessantes em simplificações quando comparado à saliência em uma única pose. Nós também aplicamos saliência de malhas ao problema de segmentação e rendering dependente de ponto de vista, introduzindo uma técnica para segmentação que particiona um objeto em um conjunto de clusters, cada um englobando um grupo de características localmente interessantes. Saliência de malhas é incorporada em um framework para clustering propagativo, guiando seleção de pontos de partida para clusters e custos de propagação de faces, levando a uma convergência de clusters ao redor de características perceptualmente importantes. Nós comparamos nossa técnica com diferentes métodos automáticos para segmentação, mostrando que ela fornece segmentação melhor ou comparável sem necessidade de intervenção do usuário. Uma vez que o algoritmo de segmentação proposto é especialmente aplicável a rendering multi-resolução, nós ilustramos uma aplicação do mesmo através de um sistema de rendering baseado em ponto de vista guiado por saliência, alcançando melhorias consideráveis em framerate com muito pouca perda de qualidade visual.Considerations on perceptual information are quickly gaining importance in mesh representation, analysis and display research. User studies, eye tracking and other techniques are able to provide ever more useful insights for many user-centric systems, which form the bulk of computer graphics applications. In this work we build upon the concept of Mesh Saliency — an automatic measure of visual importance for triangle meshes based on models of low-level human visual attention—improving, extending and integrating it with different applications. We extend the concept of Mesh Saliency to encompass deformable objects, showing how a vertex-level saliency map can be constructed that accurately captures the regions of high perceptual importance over a range of mesh poses or deformations. We define multipose saliency as a multi-scale aggregate of curvature values over a locally stable vertex neighborhood together with deformations over multiple poses. We replace the use of the Euclidean distance by geodesic distance thereby providing superior estimates of the local neighborhood. Results show that multi-pose saliency generates more visually appealing mesh simplifications when compared to a single-pose mesh saliency. We also apply Mesh Saliency to the problem of mesh segmentation and view-dependent rendering, introducing a technique for segmentation that partitions an object into a set of face clusters, each encompassing a group of locally interesting features. Mesh Saliency is incorporated in a propagative mesh clustering framework, guiding cluster seed selection and triangle propagation costs and leading to a convergence of face clusters around perceptually important features. We compare our technique with different fully automatic segmentation algorithms, showing that it provides similar or better segmentation without the need for user input. Since the proposed clustering algorithm is specially suitable for multi-resolution rendering, we illustrate application of our clustering results through a saliency-guided view-dependent rendering system, achieving significant framerate increases with little loss of visual detail.
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Kripakaran, Ramakrishnan. "Effective Strategies for Mesh Router Selection in Wireless Mesh Networks." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1267460860.
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Ooi, Shota. "Metal Complexes of meso-meso Linked and Fused Corrole Dimers." Kyoto University, 2019. http://hdl.handle.net/2433/242624.
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Galloway, LaToya B. "Mess and madness /." Full text available online, 2005. http://www.lib.rowan.edu/find/theses.
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Larsson, Agnes. "Automatic Mesh Repair." Thesis, Linköpings universitet, Informationskodning, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-98734.
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To handle broken 3D models can be a very time consuming problem. Several methods aiming for automatic mesh repair have been presented in the recent years. This thesis gives an extensive evaluation of automatic mesh repair algorithms, presents a mesh repair pipeline and describes an implemented automatic mesh repair algorithm. The presented pipeline for automatic mesh repair includes three main steps: octree generation, surface reconstruction and ray casting. Ray casting is for removal of hidden objects. The pipeline also includes a pre processing step for removal of intersecting triangles and a post processing step for error detection. The implemented algorithm presented in this thesis is a volumetric method for mesh repair. It generates an octree in which data from the input model is saved. Before creation of the output, the octree data will be patched to remove inconsistencies. The surface reconstruction is done with a method called Manifold Dual Contouring. First new vertices are created from the information saved in the octree. Then there is a possibility to cluster vertices together for decimation of the output. Thanks to a special Manifold criterion, the output is guaranteedto be manifold. Furthermore the output will have sharp and clear edges and corners thanks to the use of Singular Value Decomposition during determination of the positions of the new vertices.
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Mocanu, Bogdan Cosmin. "3D mesh morphing." Phd thesis, Institut National des Télécommunications, 2012. http://tel.archives-ouvertes.fr/tel-00836048.
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This Ph.D. thesis specifically deals with the issue of metamorphosis of 3D objects represented as 3D triangular meshes. The objective is to elaborate a complete 3D mesh morphing methodology which ensures high quality transition sequences, smooth and gradual, consistent with respect to both geometry and topology, and visually pleasant. Our first contributions concern the two different approaches of parameterization: a new barycentric mapping algorithm based on the preservation of the mesh length ratios, and a spherical parameterization technique, exploiting a Gaussian curvature criterion. The experimental evaluation, carried out on 3D models of various shapes, demonstrated a considerably improvement in terms of mesh distortion for both methods. In order to align the features of the two input models, we have considered a warping technique based on the CTPS C2a radial basis function suitable to deform the models embeddings in the parametric domain maintaining a valid mapping through the entire movement process. We show how this technique has to be adapted in order to warp meshes specified in the parametric domains. A final contribution consists of a novel algorithm for constructing a pseudo-metamesh that avoids the complex process of edge intersections encountered in the state-of-the-art. The obtained mesh structure is characterized by a small number of vertices and it is able to approximate both the source and target shapes. The entire mesh morphing framework has been integrated in an interactive application that allows the user to control and visualize all the stages of the morphing process
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Mayfield, Andrew James. "Adaptive mesh refinement." Thesis, University of Oxford, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358687.
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Flach, Guilherme Augusto. "Clock mesh optimization." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2010. http://hdl.handle.net/10183/34773.
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Malhas de relógio são arquiteturas de rede de relógio adequadas para distribuir confiavelmente o sinal de relógio na presença de variações de processo e ambientais. Tal propriedade se torna muito importante nas tecnologias submicrônicas onde variações têm um papel importante. A confiabilidade da malha de relógio é devido aos caminhos redundantes conectando o sinal de relógio até os receptores de forma que variações afetando um caminho possam ser compensadas pelos outros caminhos. A confiabilidade vem ao custo de mais consumo de potência e fiação. Desta forma fica claro o balanceamento necessário entre distribuir confiavelmente o sinal de relógio (mais redundância) e o consumo de potência e aumento de fiação. O clock skew é definido como a diferença entre os tempos de chegada do sinal de clock nos seus receptores. Quanto maior é o clock skew, mais lento o circuito precisa operar. Além de diminuir a velocidade do circuito, um valor alto de clock skew aumenta a probabilidade de o circuito não funcionar devido às variações. Neste trabalho, nos focamos no problema de clock skew. Inicialmente extraímos informações úteis de como o comprimento da fiação e a capacitância variam a medida que o tamanho da malha varia. São apresentadas fórmulas analíticas que encontram o tamanho ótimo para ambos objetivos e é apresentado um estudo de como o clock skew varia a medida que nos afastamos do tamanho ótimo da malha de relógio. Um método para a redução de clock skew através do deslocamento dos buffers também é apresentado. Tal melhoria no clock skew não afeta o consumo de potência já que o tamanho dos buffers e a malha não são alterados.Clock meshes are a suitable clock network architecture for reliably distributing the clock signal under process and environmental variations. This property becomes very important in the deep sub-micron technology where variations play a main role. The clock mesh reliability is due to redundant paths connecting clock buffers to clock sinks, so that variations affecting one path can be compensated by other paths. This comes at cost of more power consumption and wiring resources. Therefore it is clear the tradeoff between reliably distributing the clock signal (more redundancy) and the power and resource consumption. The clock skew is defined as the difference in the arrival time of clock signal at clock sinks. The higher is the clock skew, the slower is the circuit. Besides slowing down the circuit operation, a high clock skew increases the probability of circuit malfunction due to variations. In this work we focus on the clock skew problem. We first extract some useful information on how the clock wirelength and capacitance change as the mesh size changes. We present analytical formulas to find the optimum mesh size for both goals and study how the clock skew varies as we move further away from the optimum mesh size. We also present a method for reducing the clock mesh skew by sliding buffers from the position where they are traditionally placed. This improvement comes at no increasing cost of power consumption since the buffer size and the mesh capacitance are not changed.
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Ampudia, Silva Yuly Evelyn, Mauricio Carmen Carola Arias, Ruiz Jesus Mendoza, Ruibal Regalado Eliana Perez, and Huaraca Felix Urbano Rojas. "Mesa Redonda Online." Bachelor's thesis, Universidad Peruana de Ciencias Aplicadas (UPC), 2020. http://hdl.handle.net/10757/654855.
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Nuestro proyecto, Mesa Redonda Online, se presenta como una alternativa de negocio y tiene como finalidad colaborar con el intercambio de compra y venta de diversos productos que se comercializan en el conglomerado comercial de Mesa Redonda. Buscamos satisfacer la necesidad que hoy existe en las personas que no cuentan con tiempo suficiente para realizar sus compras de forma presencial y prefieren hacerlas de manera online desde la comodidad de su casa u oficina. Es por ello que proponemos implementar una plataforma de negocio electrónico con el nombre de Mesa Redonda Online. Nuestra propuesta busca intermediar entre los comerciantes del conglomerado y clientes usuarios que necesiten adquirir productos a través de nuestro aplicativo móvil.
Para la puesta en marcha, se desarrolló una investigación de mercado, en la cual identificamos el problema y también su posible solución, los cuales fueron validados y comprobados mediante entrevistas e implementación de un producto mínimo viable, cuyos resultados nos permitieron concretar el desarrollo del proyecto.
De igual manera, se desarrolló un plan de marketing orientado a ser competitivos. Implementamos una estructura organizacional propia según el modelo de gestión interna y diseñamos un plan de operaciones, aplicando indicadores de gestión, métodos técnicos y organizativos necesarios para llevar a cabo el desarrollo de nuestro servicio, considerado en 5 años.
Finalmente, aplicamos el plan económico financiero para demostrar mediante indicadores económicos y financieros la viabilidad del proyecto, a corto, mediano, y largo plazo. De esta forma, llegamos a la conclusión de que nuestro modelo de negocio es rentable.He objective of the Mesa Redonda Online business project is to be a viable alternative for the commercialization of various products that trade hands in the commercial quarter known as Mesa Redonda. We aim to satisfy the existing need of people who lack the time to do their shopping in person and prefer to shop online from the comfort of their home or office. That is why we propose the Mesa Redonda Online e-commerce platform, which will allow the commercial quarter’s customers and merchants to buy and sell through our mobile application. The first step involved market research, through which we identified the problem as well as its possible solution, which we then validated and verified through interviews and the implementation of a minimum viable product, whose results allowed us to define the development of the project. Furthermore, we developed a marketing plan aimed at being competitive. We implemented our own organizational structure according to the internal management model and designed an operations plan, applying management indicators, technical and organizational methods in order to carry out the development of our service, considering a five-year planning horizon. Finally, we applied the economic-financial plan to demonstrate through economic and financial indicators the feasibility of the project, in the short, medium, and long term. That led us to the conclusion that our business model is profitable.
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Garg, Ajay. "Automatic mesh generation /." Online version of thesis, 1990. http://hdl.handle.net/1850/11022.
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Dominius, Mathias, and Markus Pettersson. "Den som vet mest, vinner mest! : - Svensk spel efter en liberalisering." Thesis, Umeå University, Umeå School of Business, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1301.
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Uppsatsens syfte är att visa på hur Svenska Spel bäst kan tänkas möta en eventuell liberalisering av den svenska spelmarknaden. Därmed vill vi konkretisera vilka strategier och organisationsförändringar de måste anamma för att bibehålla en stark position och vara konkurrenskraftiga även efter en regelreformerad marknad.
Bakgrunden till valet av studie är att det idag och de senaste åren hänt väldigt mycket till följd av ett allt mer globaliserat samhälle. Denna utveckling har bland annat lett till att det statligt reglerade monopolet av spelmarknaden kraftigt har ifrågasatts av såväl EU-kommissionen som av de konkurrenter som redan idag finns på den svårkontrollerade Internetmarknaden.
Uppsatsen inleds med en omfattande referensram, där Svenska Spels utgångspunkter idag utreds, samt hur utvecklingen på andra redan tidigare liberaliserade marknader har sett ut. Avsikten med detta är att ha denna information som ett komplement till den empiri som insamlats.
Empirin består dels av två respondenter, en från Svenska Spel, samt en av deras huvudkonkurrenter, Expekt. Empirin består även av en informant som är sakkunnig på konkurrensverket.
I analysen analyseras teorierna först separat enligt den ordningsföljd som ges av vår modell. Därefter vävs slutsatserna samman och presenteras kortfattat i en modell.
Vi finner i våra slutsatser att Svenska Spels idag är väl rustade inför en regelreformering. Troligen bäst av alla de aktörer som vill in på den svenska spelmarknaden. Detta då det mest sannolikt kommer att bli minst lika mycket regler även efter en liberalisering, och Svenska Spel redan idag har en organisation anpassad efter ett massivt regelverk.
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Zhao, Rui. "Mesh distributed coordination function for efficient wireless Mesh networks supporting QoS /." Aachen : Mainz, 2007. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=016149899&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
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Bam, Campbell A. "Development of a Three-Dimensional Mesh Generator With Analytical Mesh Sensitivities." Diss., University of Pretoria, 2020. http://hdl.handle.net/2263/75655.
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Structural shape optimisation is a field that has been studied since early on in the development of finite element methods. The sub-fields of shape and topology optimisation are continuously growing in industry and aim to leverage the benefits of technologies such as 3D printing and additive manufacturing. These fields are also being used to optimise designs to improve quality and reduce cost.
Gradient-based optimisation is well understood as an efficient method of obtaining solutions. In order to implement gradient-based optimisation methods in the context of structural shape optimisation, sensitivities describing the change of the domain stiffness are required. To obtain the stiffness sensitivities, mesh deformation sensitivities are required. In this study, a mesh generating method is developed that provides mesh deformation sensitivities.
For shape optimisation it is advantageous to employ an optimisation algorithm that allows for the manipulation of CAD geometry. This means that the CAD geometry is finalised upon completion of the optimisation process. This, however, necessitates the calculation of accurate sensitivities associated with non-linear geometries, such as NURBS (those present in CAD), by the mesher.
The meshing method developed in this study is analogous to a linear truss system. The system is solved for static equilibrium through a geometrically non-linear finite element analysis using Newton’s method. Sensitivities are made available by Newton’s method for use in generating mesh sensitivities for the system.
It is important for the mesher to be able to accurately describe the geometrical domain which approximates the geometry being modelled. To do so, nodes on the boundary may not depart from the boundary. Instead of prescribing all boundary nodes, this mesher frees the boundary nodes to move
University of Pretoria ii
Department of Mechanical and Aeronautical Engineering
along, but not away from the boundary. This is achieved using multipoint constraints since they allow for an analytical relationship between boundary node movement and the boundary.
Two multipoint constraint (MPC) methods are investigated for boundary discretisation, namely, the Lagrangian and master-slave elimination methods (MSEM). The MSEM presents several difficulties in obtaining convergence on non-linear boundaries in general when compared to the Lagrangian method.
The MSEM has reduced computational requirements for a single Newton step, especially when direct solvers are used. However, when indirect solvers are implemented the time difference between the two MPC methods reduces significantly. For a “medium” curvature geometry the Lagrangian implementation has only a 6% time penalty.
The Lagrangian method is selected as the preferred MPC method for implementation in the mesher to avoid the convergence problems associated with the MSEM. This is justified on the basis of reliability outweighing the 6% time penalty for what is intended to be a tool in the shape optimisation process.
Analytical sensitivities are obtained for the truss system in order to account for the MPC boundaries. The analytical mesh sensitivities are proven to be accurate through comparison with numerical sensitivities. The method is demonstrated to be able to accurately described the mesh deformation throughout the domain for both uniform and non-uniform meshes in the presence of non-linear boundaries.Dissertation (MEng)--University of Pretoria, 2020.
Mechanical and Aeronautical Engineering
MEng (Mech)
Unrestricted
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Barral, Nicolas. "Time-accurate anisotropic mesh adaptation for three-dimensional moving mesh problems." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066476/document.
Full textAbstract:
Les simulations dépendant du temps sont toujours un challenge dans l'industrie, notamment à cause des problèmes posés par les géométries mobiles en termes de CPU et de précision. Cette thèse présente des contributions à certains aspects des simulations en géométrie mobile. Un algorithme de bouger de maillage fondé sur une déformation de maillage sur un grand pas de temps et des changements de connectivité (swaps) est étudié. Une méthode d'élasticité et une méthode d'interpolation directe sont comparées en 3D, démontrant l'efficacité de l'algorithme. Cet algorithme est couplé à un solver ALE, dont les schémas et l'implémentation en 3D sont décrits en détail. Une interpolation linéaire est utilisée pou traiter les swaps. Des cas de validation montrent que les swaps n'influent pas notablement sur la précision de la solution. Plusieurs examples complexes en 3D démontrent la puissance de cette approche, pour des mouvement imposés ou pour des problèmes d'Interaction Fluide-Structure. L'adaptation de maillage anisotrope a démontré son efficacité pour améliorer la précision des calculs stationnaires pour un coût raisonnable. On considère l'extension de ces méthodes aux problèmes instationnaires, en mettant à jour l'algorithme de point fixe précédent grâce à une ananlyse de l'erreur espace-temps fondée sur le modèle de maillage continu. Une parallélisation efficace permet de réaliser des simulations adaptatives instationnaires avec une précision inégalée. Cet algorithme est étendu au cas des géométries mobiles en corrigeant la métrique optimale instationnaire. Finalement, plusieurs exemples 3D de simulations adaptatives en géométries mobiles démontrent l'efficacité de l'approcheTime dependent simulations are still a challenge for industry, notably due to problems raised by moving boundaries, both in terms of CPU cost and accuracy. This thesis presents contributions to several aspects of simulations with moving meshes. A moving-mesh algorithm based on a large deformation time step and connectivity changes (swaps) is studied. An elasticity method and an Inverse Distance Weighted interpolation method are compared on many 3D examples, demonstrating the efficiency of the algorithm in handling large geometry displacement without remeshing. This algorithm is coupled with an Arbitrary-Lagrangian-Eulerian (ALE) solver, whose schemes and implementation in 3D are described in details. A linear interpolation scheme is used to handle swaps. Validation test cases showed that the use of swaps does not impact notably the accuracy of the solution, while several other complex 3D examples demonstrate the capabilities of the approach both with imposed motion and Fluid-Structure Interaction problems. Metric-based mesh adaptation has proved its efficiency in improving the accuracy of steady simulation at a reasonable cost. We consider the extension of these methods to unsteady problems, updating the previous fixed-point algorithm thanks to a new space-time error analysis based on the continuous mesh model. An efficient p-thread parallelization enables running 3D unsteady adaptative simulations with a new level of accuracy. This algorithm is extended to moving mesh problems, notably by correcting the optimal unsteady metric. Finally several 3D examples of adaptative moving mesh simulations are exhibited, that prove our concept by improving notably the accuracy of the solution for a reasonable time cost
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Sharbatdar, Mahkame. "Error estimation and mesh adaptation paradigm for unstructured mesh finite volume methods." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/60359.
Full textAbstract:
Error quantification for industrial CFD requires a new paradigm in which a robust flow solver with error quantification capabilities reliably produces solutions with known error bounds. Error quantification hinges on the ability to accurately estimate and efficiently exploit the local truncation error. The goal of this thesis is to develop a reliable truncation error estimator for finite-volume schemes and to use this truncation error estimate to improve flow solutions through defect correction, to correct the output functional, and to adapt the mesh. We use a higher-order flux integral based on lower order solution as an estimation of the truncation error which includes the leading term in the truncation error. Our results show that using this original truncation error estimate is dominated by rough modes and fails to provide the desired convergence for the applications of defect correction, output error estimation and mesh adaptation. So, we tried to obtain an estimate of the truncation error based on the continuous interpolated solution to improve their performance. Two different methods for interpolating were proposed: CGM's 3D surfaces and C¹ interpolation of the solution. We compared the effectiveness of these two interpolating schemes for defect correction and using C¹ interpolation of the solution for interpolating is more helpful compared to CGM, so we continued using C¹ interpolation for other purposes. For defect correction, although using the modified truncation error does not improve the order of accuracy, significant quantitative improvements are obtained. Output functional correction is based on the truncation error and the adjoint solution. Both discrete and continuous adjoint solutions can be used for functional correction. Our results for a variety of governing equations suggest that the interpolating scheme can improve the correction process significantly and improve accuracy asymptotically. Different adaptation indicators were considered for mesh adaptation and our results show that the estimate of the truncation error based on the interpolated solution is a more accurate indicator compared to the original truncation error. Adjoint-based mesh adaptation combined with modified truncation error provides even faster convergence of the output functional.Applied Science, Faculty of
Mechanical Engineering, Department of
Graduate
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Hällström, Magnus. "Strömmande video i trådlösa mesh nätverk : Streaming video in wireless mesh networks." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-89016.
Full textAbstract:
This document’s content is the final report of the master´s dissertation Magnus Hällström did during springtime of year 2013. The dissertation’s subject is 802.11s wireless mesh networks with streaming video as a focus point. During the dissertation a wireless mesh network was set up with different attached cameras for streaming video. A sun panel solution was also tested with the goal of creating a package with a self-configuring network node streaming video, powered by nothing but solar energy.
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Jackson, Charles Wilson V. "Truncation Error Based Mesh Adaptation and its Application to Multi-Mesh CFD." Diss., Virginia Tech, 2019. http://hdl.handle.net/10919/91890.
Full textAbstract:
One of the largest sources of error in a CFD simulation is the discretization error. One of the least computationally expensive ways of reducing the discretization error in a simulation is by performing mesh adaptation. In this work, the mesh adaptation processes are driven by the truncation error, which is the local source of the discretization error. Because this work is focused on methods for structured grids, r-adaptation is used as opposed to h-adaptation.
A new method for performing the r-adaptation based on an optimization process is developed and presented here. This optimization process was applied to simple 1D and 2D Euler problems as a method of testing the approach. The mesh optimization approach is compared to the more common equidistribution approach to determine which produces more accurate results as well as the costs associated with each. It is found that the optimization process is able to reduce the truncation error than equidistribution. However, in the 2D cases optimization does not reduce the discretization error sufficiently to warrant the significant costs of the approach. This indicates that the much cheaper equidistribution process provides a cost-effective manner to reduce the discretization error in the solution. Further, equidistribution is able to achieve the bulk of the potential reductions in discretization error possible through r-adaptation.
This work also develops a new framework for reducing the cost of performing truncation error based r-adaptation. This new framework also addresses some of the issues associated with r-adaptation. In this framework, adaptation is performed on a coarse mesh where it is faster to perform, creating a mapping function for this mesh, and finally evaluating this mapping at a fine enough mesh to meet the error target. The framework is used for 2D Euler and 2D laminar Navier-Stokes problems and shown to be the most cost-effective way to meet a desired error target.
Finally, the multi-mesh CFD method is introduced and applied to a wide variety of problems from quasi-1D nozzle to 2D laminar and turbulent boundary layers. The multi-mesh method allows the system of equations to be solved on a system of meshes. With this method, each equation is solved on a mesh that is adapted specifically for it, meaning that more accurate solutions for each equation can be obtained. This work shows that, for certain problems, the multi-mesh approach is able to achieve more accurate results in less time compared to using a single mesh.Doctor of Philosophy
Computational fluid dynamics (CFD) describes a method of numerically solving equations that attempt to model the behavior of a fluid. As computers have become cheaper and more powerful and the software has become more capable, CFD has become an integral part of the engineering process. One of the goals of the field is to be able to bring these higher fidelity simulations into the design loop earlier. Ideally, using CFD earlier in the design process would allow design engineers to create new innovative designs with less programmatic risk. Likewise, it is also becoming necessary to use these CFD tools later in the final design process to replace some physical experiments which can be expensive, unsafe, or infeasible to run. Both of these goals require the CFD codes to meet the accuracy requirements for the results as fast as possible. This work discusses several different methods for improving the accuracy of the simulations as well as ways of obtaining these more accurate results for the cheapest cost. In CFD, the governing equations modeling the flow behavior are solved on a computer. As a result, these continuous differential equations must be approximated as a system of discrete equations, so that they can be solved on a computer. These approximations result in discretization error, the difference between the exact solutions to the discrete and continuous equations, which is typically the largest type of numerical error in a CFD solution. The source of the discretization error is the truncation error, which is composed of the terms left out of the approximations made when discretizing the continuous equations. Thus, if the truncation error can be reduced, the discretization error in the solution should also be reduced. In this work, several different ways of reducing this truncation error through mesh adaptation are discussed, including the use of optimization methods. These mesh optimization methods are compared to a more common way of performing adaptation, namely equidistribution. It is determined that equidistribution is able to reduce the discretization error by a similar amount while being significantly faster than mesh optimization. This work also presents a framework for making the adaptation process faster overall by performing the adaptation on a coarse mesh and then refining the mesh enough to meet the error tolerance for the application. This framework was the cheapest method investigated to meet a given error target. This work also introduces a new technique called multi-mesh CFD, which allows each equation (conservation of mass, momentum, energy, etc.) to be solved on a separate mesh. This allows each equation to be solved on a mesh that is specifically adapted for it, resulting in a more accurate solution. Here, it is shown that, for certain problems, the multi-mesh technique is able to obtain a solution with lower error than only using a single mesh. This work also shows that these more accurate results can be obtained in less time using multiple meshes than on a single mesh.
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Prati, Simone. "Tecniche di Mesh Processing." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2018.
Find full textAbstract:
Al giorno d’oggi nel campo della computer grafica, per creare modelli tridimensionali di qualsiasi tipo, dai poliedri alle superfici curve che riescono ad essere ben approssimate vengono utilizzate prevalentemente le mesh poligonali. L’utilizzo delle mesh poligonali, si è diffuso a macchia d’olio nei campi più disparati: a partire dall’ambito cinematografico si è diffuso anche in quello videoludico, in architettura e persino in ambito medico. Le mesh poligonali sono semplicemente insiemi di poligoni, che possono avere varie forme, con i quali è possibile approssimare qualunque oggetto. La continua evoluzione e il continuo progredire delle tecnologie hanno portato alla richiesta di modelli sempre più complessi e, nel corso degli anni, il carico computazionale richiesto per gestire il rendering di questo tipo di strutture è notevolmente aumentato. Per risolvere questa problematica, nel tempo, sono state sviluppate tecniche che permettono di ottimizzare e semplificare le mesh poligonali: le tecniche di mesh reduction che prendono in input una maglia complessa e ne restituiscono una semplificata, con un ridotto numero di poligoni, ma che ne rappresenta una buona approssimazione. Nel corso di questo elaborato saranno analizzate alcune di queste tecniche.
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Lotze, Cynthia Grier. "From Below Table Mesa." VCU Scholars Compass, 2006. http://hdl.handle.net/10156/2018.
Full text
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Abdalla, Taha. "Scalable Wireless Mesh Networks." University of the Western Cape, 2016. http://hdl.handle.net/11394/5868.
Full textAbstract:
Magister Scientiae - MSc (Computer Science)Wireless Mesh Networks (WMNs) are wireless multi-hop networks built on wireless nodes that operate in an Independent Basic Set Identifier (IBSS) mode of the IEEE 208.11 wireless standard. IBSS is well known as an ad hoc mode which is found to build ad hoc wireless networks with the aid of routing protocols crafted to work in this mode. Ad hoc wireless mesh networks are always described as self-healing, self-configuring, easy to build, etc. However, these features do come at a cost because a WMN suffers performance degradation and scalability issues, which mainly come from the underlying IBSS mode that is used to form the physical network. Furthermore this is exacerbated by routing protocols in the upper layers which are intended to form a flat network architecture. Partitioning or clustering the flat network into smaller units has been proven to be a viable mechanism to counter the scalability problem in the communication network. The wired network for instance, presents a segmented, hierarchical architecture, where end user devices are organized in virtual local area networks (VLANs) using Ethernet switches and then Routers aggregate multiple VLANs. This thesis develops and evaluates a heterogeneous, clustering architecture to enhance WMN scalability and management. In the proposed architecture, the clustering is separated from the routing, where the clustering is done at the physical layer. At the routing level, each cluster is configured as a WMN using layer 2 routing for intra-cluster routing, and layer 3 routing for inter-domain routing between clusters. Prototypes for the proposed architecture have been built in a laboratory testbed. The proposed architecture reported better scalability and performance results compared to the traditional flat architecture.
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Rocha, Lucas Alonso [UNESP]. "Materiais meso-estruturados luminescentes." Universidade Estadual Paulista (UNESP), 2010. http://hdl.handle.net/11449/105768.
Full textAbstract:
Made available in DSpace on 2014-06-11T19:35:07Z (GMT). No. of bitstreams: 0
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rocha_la_dr_araiq.pdf: 3758896 bytes, checksum: 8f9b1dddc8f92a0c77915bd317de357f (MD5)Partículas esféricas de sílica mesoporosa foram obtidas a partir da síntese “template” pelo processo de pirólise de aerossol. O processo foi otimizado para a obtenção de materiais mesoporosos sem resíduos orgânicos e preparados em uma única etapa, eliminando assim, a longa etapa de remoção do surfactante na metodologia tradicional (tratamento térmico ou extração soxhlet, podendo durar dezenas de horas). A otimização do processo de pirólise de aerossol proposta nesta tese reduziu este tempo para apenas alguns minutos. Os materiais apresentaram uma área superficial (BET) de até 1028 m2 .g-1 , com volume de poros (BJH) de 0,58 cm3 .g-1 . Os difratogramas de raios-X indicaram um alto grau de organização com um arranjo hexagonal de poros, confirmado também pela microscopia eletrônica de transmissão. Além disto, bandas características de grupos orgânicos não foram observadas nos espectros de absorção na região do infra-vermelho para as amostras obtidas acima de 600ºC. Amostras dopadas com íons Eu3+ também foram preparadas durante a tese. A análise por espectroscopia de luminescência, para íons Eu3+ , indicou que o íon está encapsulado nos canais mesoporosos sem prévia modificação química da matriz. Posteriormente, moléculas de 1,10- Fenantrolina foram coordenadas ao íon Eu3+ aumentando a faixa espectral de excitação do íon (efeito antena). Além disto, partículas luminescentes também foram obtidas pela incorporação do complexo Eu(fod)3 ou rodamina-B nos poros das matrizes. Finalmente, testes de recobrimento (core shell, SiO2 mesoporoso-SiO2) das partículas luminescentes foram realizados e os resultados indicaram que independentemente da espessura obtida pelo processo de recobrimento, o grau de organização dos poros e a fotoluminescência não sofreram alterações
Spherical mesoporous silica particles were obtained using the template synthesis by spray pyrolysis process. The process was optimized for the preparation of the mesoporous materials in one-pot route without organic residues, eliminating thus, the long process of removal of the surfactant, usually used in the available methods (heat treatment or soxhlet extraction, which require several hours or days). The one- pot route proposed in this thesis reduced the extraction process to only a several minutes. These materials presented a surface area value (BET) of 1028m2 .g-1 and pore volume (BJH) was 0,58 cm3 .g-1 . The X-ray diffraction patterns and the transmission electronic micrographs show an ordered typical p6mm 2D hexagonal mesostructure. Characteristics bands of organic groups were not observed in the infra-red absorption spectra for the samples obtained at 600ºC. Moreover, SiO2 mesoporous doped with Eu3+ ions were also prepared. Luminescence data suggest that the Eu3+ ions were successful encapsulated into the channels of mesoporous silica without any preliminary chemical modification of the matrix. Moreover, extra ligands such as 1,10-Phenantroline can be further coordinated, increasing the spectral range excitation (antenna effect). Furthermore, luminescent particles were also prepared by the wet impregnation of Eu(fod)3 complex and rhodamine-B molecules. Finally, tests of coating (core shell, SiO2 mesoporous-SiO2) of luminescent particles had been carried through and the The results obtained show spherical shape and the observation of a highly ordered hexagonal array of mesochannels further confirms the 2D hexagonal p6m structure. Luminescence results reveal that rhodamine-B has been successfully encapsulated into the channels of mesoporous particles. Silica coating has been observed in TEM measurements
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Langis, Christian. "Mesh simplification in parallel." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0020/MQ48438.pdf.
Full text
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Ovreiu, Elena. "Accurate 3D mesh simplification." Phd thesis, INSA de Lyon, 2012. http://tel.archives-ouvertes.fr/tel-00838783.
Full textAbstract:
Complex 3D digital objects are used in many domains such as animation films, scientific visualization, medical imaging and computer vision. These objects are usually represented by triangular meshes with many triangles. The simplification of those objects in order to keep them as close as possible to the original has received a lot of attention in the recent years. In this context, we propose a simplification algorithm which is focused on the accuracy of the simplifications. The mesh simplification uses edges collapses with vertex relocation by minimizing an error metric. Accuracy is obtained with the two error metrics we use: the Accurate Measure of Quadratic Error (AMQE) and the Symmetric Measure of Quadratic Error (SMQE). AMQE is computed as the weighted sum of squared distances between the simplified mesh and the original one. Accuracy of the measure of the geometric deviation introduced in the mesh by an edge collapse is given by the distances between surfaces. The distances are computed in between sample points of the simplified mesh and the faces of the original one. SMQE is similar to the AMQE method but computed in the both, direct and reverse directions, i.e. simplified to original and original to simplified meshes. The SMQE approach is computationnaly more expensive than the AMQE but the advantage of computing the AMQE in a reverse fashion results in the preservation of boundaries, sharp features and isolated regions of the mesh. For both measures we obtain better results than methods proposed in the literature.
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Meliani, H. "Mesh generation in TLM." Thesis, University of Nottingham, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.381077.
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Lambert, Claire. "Adaptive triangular mesh generation." Thesis, Manchester Metropolitan University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296485.
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Rocha, Lucas Alonso. "Materiais meso-estruturados luminescentes." Araraquara : [s.n.], 2010. http://hdl.handle.net/11449/105768.
Full textAbstract:
Orientador: Sidney José Lima RibeiroOrientador: Marc Verelst
Banca: Younès Messaddeq
Banca: Oscar Manoel Loureiro Malta
Banca: Luis Antonio Ferreira Martins Dias Carlos
Banca: Marie-Joëlle Menu
Banca: Jeannette Dexpert-Ghys
Resumo: Partículas esféricas de sílica mesoporosa foram obtidas a partir da síntese "template" pelo processo de pirólise de aerossol. O processo foi otimizado para a obtenção de materiais mesoporosos sem resíduos orgânicos e preparados em uma única etapa, eliminando assim, a longa etapa de remoção do surfactante na metodologia tradicional (tratamento térmico ou extração soxhlet, podendo durar dezenas de horas). A otimização do processo de pirólise de aerossol proposta nesta tese reduziu este tempo para apenas alguns minutos. Os materiais apresentaram uma área superficial (BET) de até 1028 m2 .g-1 , com volume de poros (BJH) de 0,58 cm3 .g-1 . Os difratogramas de raios-X indicaram um alto grau de organização com um arranjo hexagonal de poros, confirmado também pela microscopia eletrônica de transmissão. Além disto, bandas características de grupos orgânicos não foram observadas nos espectros de absorção na região do infra-vermelho para as amostras obtidas acima de 600ºC. Amostras dopadas com íons Eu3+ também foram preparadas durante a tese. A análise por espectroscopia de luminescência, para íons Eu3+ , indicou que o íon está encapsulado nos canais mesoporosos sem prévia modificação química da matriz. Posteriormente, moléculas de 1,10- Fenantrolina foram coordenadas ao íon Eu3+ aumentando a faixa espectral de excitação do íon (efeito antena). Além disto, partículas luminescentes também foram obtidas pela incorporação do complexo Eu(fod)3 ou rodamina-B nos poros das matrizes. Finalmente, testes de recobrimento (core shell, SiO2 mesoporoso-SiO2) das partículas luminescentes foram realizados e os resultados indicaram que independentemente da espessura obtida pelo processo de recobrimento, o grau de organização dos poros e a fotoluminescência não sofreram alterações
Abstract: Spherical mesoporous silica particles were obtained using the template synthesis by spray pyrolysis process. The process was optimized for the preparation of the mesoporous materials in one-pot route without organic residues, eliminating thus, the long process of removal of the surfactant, usually used in the available methods (heat treatment or soxhlet extraction, which require several hours or days). The one- pot route proposed in this thesis reduced the extraction process to only a several minutes. These materials presented a surface area value (BET) of 1028m2 .g-1 and pore volume (BJH) was 0,58 cm3 .g-1 . The X-ray diffraction patterns and the transmission electronic micrographs show an ordered typical p6mm 2D hexagonal mesostructure. Characteristics bands of organic groups were not observed in the infra-red absorption spectra for the samples obtained at 600ºC. Moreover, SiO2 mesoporous doped with Eu3+ ions were also prepared. Luminescence data suggest that the Eu3+ ions were successful encapsulated into the channels of mesoporous silica without any preliminary chemical modification of the matrix. Moreover, extra ligands such as 1,10-Phenantroline can be further coordinated, increasing the spectral range excitation (antenna effect). Furthermore, luminescent particles were also prepared by the wet impregnation of Eu(fod)3 complex and rhodamine-B molecules. Finally, tests of coating (core shell, SiO2 mesoporous-SiO2) of luminescent particles had been carried through and the The results obtained show spherical shape and the observation of a highly ordered hexagonal array of mesochannels further confirms the 2D hexagonal p6m structure. Luminescence results reveal that rhodamine-B has been successfully encapsulated into the channels of mesoporous particles. Silica coating has been observed in TEM measurements
Doutor
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Cornejo, Noelia, and Jorge Moreno. "Mesa Redonda: La Descentralización." Derecho & Sociedad, 2017. http://repositorio.pucp.edu.pe/index/handle/123456789/118982.
Full textAbstract:
La descentralización es un proceso permanente que tiene como objetivo el desarrollo integral del país. Así, la Constitución Política prevé que el gobierno es unitario, representativo y descentralizado y que el territorio está dividido en regiones, departamentos, provincias y distritos. No obstante que la Constitución Política rige desde el año 1993, recién este año se ha dado inicio a una descentralización del gobierno, a través de las regiones.Sin embargo, y a pesar de su importancia, la ciudadanía desconoce qué es la descentralización, cuáles son sus objetivos, y principalmente, cuáles son los efectos que generará su aplicación en el país.
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Rampon, Wagner Gonçalves. "Patient specific mesh generation." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2016. http://hdl.handle.net/10183/138235.
Full textAbstract:
Este trabalho apresenta um estudo sobre segmentação de volumes médicos e uma solução para se obter malhas poligonais de pacientes específicos para uso em simulações de cirurgia. Malhas de pacientes específicos são importantes para planejamento de intervenções cirúrgicas e permitem uma melhor visualização de condições patológicas em um paciente, coisa não obtível em malhas geradas artisticamente. Nós analisamos quais são os fatores complicantes para se obter estas malhas de um paciente específico usando apenas imagens médicas obtidas em exames padrões. Para isso, nós revisamos diversos métodos existentes para segmentação de volumes médicos. Isso nos levou a definir os problemas com as técnicas existentes, e a desenvolver um método que não sofra destes problemas, utilizando pouca interação humana e não tendo dependências de mais dados que não o exame do paciente. Nosso alvo para obter malhas especificas foram órgãos de tecido mole, que são um caso especialmente complicado da área, graças a várias questões relacionadas às imagens médicas e à anatomia humana. Atacamos esse problema aplicando modificações geométricas em malhas especiais, que deformam até atingir a forma dos órgãos que se deseja segmentar. Os resultados mostram que nossa técnica conseguiu obter malhas específicas de pacientes a partir de volumes médicos com qualidade superior a de outros algoritmos de mesma classe. Graças a simplicidade do método desenvolvido, nossos resultados são facilmente implementáveis e reproduzidos.This work presents a study about medical-volume segmentation and a solution to generate patient-specific meshes to use in patient-specific surgery simulations. Patientspecific meshes are useful assets for surgery planning and to allow better visualization of certain pathological conditions of a given patient, which are not obtainable by artistically designed meshes. We analyzed what are the complications to obtain a patient-specific mesh using only standard medical imagery exams. For that, we reviewed several medical volume segmentation techniques. It led us to define the problems within the existing techniques and to develop a method that does not suffer from these problems, with the least possible user interaction or relying on any other data other then the patient exam. Our target for obtaining specific meshes were soft tissue organs, which are a specially complicated case due to various issues related to the medical images and human anatomy. This is accomplished by geometrical operations over special meshes that deform until achieving the shape of the desired organ. Results show that our technique was able to obtain patient-specific meshes from medical images with superior quality than algorithms of the same class. Thanks to the simplicity of the developed approach, its also easy to implement and to reproduce our obtained results.
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Beltrán, Jorge, Sandra Echaiz, Leandro García, and Alfredo Soria. "Mesa Redonda : Incumplimiento Contractual." Universidad Peruana de Ciencias Aplicadas (UPC), 2021. http://hdl.handle.net/10757/655872.
Full textAbstract:
Jorge Beltran (Perú) - Panelista; Sandra Echaiz (Perú) - Panelista; Leandro García (Perú) - Panelista; Alfredo Soria (Perú) - ModeradorEste evento abordará la temática del incumplimiento de los contratos y sus consecuencias jurídicas. Se desarrollarán aspectos elementales del incumplimiento contractual y las respuestas que brinda el derecho, a través de la regulación civil de los contratos en general, el derecho de obligaciones y de las normas especiales de contratos, incluyendo la regulación del contrato de obra.