Made available in DSpace on 2014-12-17T15:06:50Z (GMT). No. of bitstreams: 1 ArianeAO_DISSERT_parte autorizada.pdf: 746122 bytes, checksum: 22c370c209fbca7c03c8abfda3e5f019 (MD5) Previous issue date: 2010-05-24 / Cette recherche analyse les pratiques de correction de textes de l'enseignement du 1, 2 et 3 ?me niveau. Nous avons parti de discutions avec les professeurs de Langue Portugaise des troisi?mes ann?es d?une ?cole appartenant au enseignement publique, situ?e ? la ville d?Assu RN. L'?tude a les postulats th?oriques de Cruz (2007), Dellagnelo (1998), Oliveira (2005), P?cora (1999), Ruiz (2001), Serafini (1989), et d?autres. La m?thodologie est de nature qualitative et d?interpretation, dont le mat?riel a ?t? constitu? ? partir des rapports des enseignants professionnels, ainsi que les 92 textes recueillies entre juillet et ao?t 2008. Les d?s montrent que la correction se configure comme un travail pratique, qui vise ? aider les ?tudiants ? am?liorer leur ?criture. Les professeurs font la correction d?une forme m?lang?e, c'est-?-dire dans le texte apparaissent les corrections orthographiques, lexicales, etc., mais la pr?dominance de la correction est par rapport aux id?es, pour le contenu du texte. Dans ce sens, les professeurs se rendent compte du valeur et de la hi?rarchisation des id?es discut?es par les ?l?ves, les reconna?tre comme l'organisation de la s?mantique et la s?quence du texte. Tous les autres aspects (structurelles, grammaticaux) sont importants, cependant, en g?n?ral, dans la pratique de correction des ?tudes, l?exposition les id?es occupent une place importante. Les marques de correction apparaissent sous la forme de petits billets, qui appr?cie ?galement toutes les ?tapes de l'?criture de texte / Este trabalho de pesquisa analisa as pr?ticas de corre??o de textos no Ensino M?dio. Parte-se de discuss?es com professoras de L?ngua Portuguesa do 1?, 2? e 3? anos de uma escola pertencente ? rede estadual de ensino, localizada no munic?pio de Ass?-RN. O estudo tem como fundamenta??o te?rica os postulados propostos por Cruz (2007), Dellagnelo (1998), Oliveira (2005), P?cora (1999), Ruiz (2001), Serafini (1989), dentre outros. A metodologia ? de natureza qualitativa e interpretativista, tendo sido os dados constitu?dos a partir das grava??es dos relatos de profissionais docentes, bem como de 92 textos coletados entre julho e agosto de 2008. Os dados apontam que a corre??o configura-se como um trabalho interventivo, que objetiva ajudar ao aluno a melhorar sua produ??o escrita. As docentes corrigem de forma mista, isto ?, no texto aparecem corre??es ortogr?ficas, lexicais, etc., por?m a predomin?ncia da corre??o ? com rela??o a exposi??o das ideias, aos conte?dos do texto. Nesse sentido, as professoras valorizam e priorizam esta exposi??o de ideias discutidas pelos alunos, reconhecendo-as como organizadoras dos aspectos sem?nticos e sequenciais do texto. Todos os demais aspectos (estruturais, gramaticais) s?o importantes, por?m, no geral, na pr?tica de corre??o em estudo, a exposi??o das ideias ocupa lugar central. As marcas de corre??o aparecem em forma de pequenos bilhetes, o que faz com que elas valorizem tamb?m todas as etapas da escrita do texto

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Made available in DSpace on 2014-12-17T14:56:18Z (GMT). No. of bitstreams: 1 AntonioWAS_DISSERT.pdf: 2078440 bytes, checksum: 8f0b0683ae325a95be82dafa64af1734 (MD5) Previous issue date: 2013-12-18 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The use of Field Programmable Gate Array (FPGA) for development of digital control strategies for power electronics applications has aroused a growing interest of many researchers. This interest is due to the great advantages offered by FPGA, which include: lower design effort, high performance and highly flexible prototyping. This work proposes the development and implementation of an unified one-cycle controller for boost CFP rectifier based on FPGA. This controller can be applied to a total of twelve converters, six inverters and six rectifiers defined by four single phase VSI topologies and three voltage modulation types. The topologies considered in this work are: full-bridge, interleaved full-bridge, half-bridge and interleaved half-bridge. While modulations are classified in bipolar voltage modulation (BVM), unipolar voltage modulation (UVM) and clamped voltage modulation (CVM). The proposed project is developed and prototyped using tools Matlab/Simulink? together with the DSP Builder library provided by Altera?. The proposed controller was validated with simulation and experimental results / A utiliza??o de Field Programmable Gate Array (FPGA) para o desenvolvimento de estrat?gias de controle digital para aplica??es em eletr?nica de pot?ncia tem despertado um crescente interesse entre muitos pesquisadores. Tal interesse se deve as grandes vantagens apresentadas pelo FPGA, que incluem: menor esfor?o de projeto, alto desempenho e grande flexibilidade de prototipagem. Este trabalho prop?e o desenvolvimento e implementa??o de um controlador unificado, mediante o uso de FPGA, utilizando a t?cnica de controle de um ciclo (One-Cycle Control Technique) para corre??o de fator de pot?ncia com retificadores boost. Este controlador pode ser aplicado a um total de doze conversores, sendo seis inversores e seis retificadores, definidos pela topologia e pelo tipo de modula??o de tens?o. As topologias consideradas neste trabalho s?o: ponte completa, ponte completa intercalada, meia ponte e meia ponte intercalada. Enquanto que as modula??es s?o classificadas em modula??o bipolar de tens?o (MBT), modula??o unipolar de tens?o (MUT) e modula??o com grampeamento de tens?o (MGT). O projeto ? desenvolvido e prototipado utilizando as ferramentas Matlab?/Simulink em conjunto com a biblioteca DSP Builder, disponibilizada pela Altera?. O controlador proposto ? com resultados de simula??o e experimentais

As a natural composite material, wood exhibits complex structural char-acteristics and diverse behavior under compression and tensile forces. Itsanisotropic nature results in mechanical properties that vary depending onthe load direction along its longitudinal, tangential, and radial grains. An im-portant property of anisotropic materials is the modulus of elasticity, whichrelates stress to strain and demonstrates directional variations.This study focuses on investigating the mechanical properties of pinewood,particularly stiffness, and deformation, in the longitudinal direction duringcompression, taking into account the effect of the sample size. The digitalimage correlation (DIC) method is utilized to measure deformation, an op-tical technique that involves tracking motion in DIC patterns. Wood, beinga renewable and natural composite resource, has been widely used as a con-struction material and for various other purposes for centuries. Its physicaland mechanical properties encompass a broad spectrum influenced by factorssuch as species, moisture content, density, and temperature.This research aims to analyze the size-dependent effects on deformation andstiffness in pine wood samples using the DIC method. Initially, three sam-ple sizes were compared, namely 10 × 10 × 10mm3, 20 × 20 × 20mm3, and25 × 25 × 100mm3 these were selected based on Afshar (2022) and Walley& Rogers (2022). However, the sample size of 20 × 20 × 20mm3 producedinsufficient results due to equipment limitations to test them under sufficientload. Among the remaining sample groups, nine specimens from each groupwere tested and compared in terms of stiffness and deformation. The exper-imental results did not provide statistically significant data supporting thepresence of a noticeable size effect between the dimensions of the samples10 × 10 × 10mm3 and 25 × 25 × 100mm3. / Trä är ett förnybart och naturligt kompositmaterial och har i århundradenanvänts som byggmaterial och för olika ändamål. Dess fysikaliska och mekaniskaegenskaper omfattar ett brett spektrum som påverkas av faktorer som fuk-thalt, densitet och temperatur. Trä som ett naturligt kompositmaterial ochdess komplexa strukturella egenskaper visar varierande beteende vid tryckoch dragkrafter. Träets anisotropa natur gör att dess mekaniska egenskapervarierar beroende på belastningsriktning, längs dess längd, tangential ellerradial riktning. För anisotropa material är elasticitetsmodulen en viktig egen-skap som varierar längs de olika riktningarna. Vilket är ett samband mellanspänning och deformationen och visar riktningsvariationer.Den här studien syftar till att undersöka de mekaniska egenskaper hos furu.Den här studien undersöker storleks-effekt i materialet furus styvhet och de-formationen längs fiberriktning (längd) vid kompression med hjälp av DigitalImage Correlation (DIC). Metoden DIC är en optisk teknik som mäter de-formationen hos material med hjälp av spårningsmönster på materialet.För att se storleks effekten hos trä jämfördes initiellt tre provstorlekar, näm-ligen 10 × 10 × 10mm3, 20 × 20 × 20mm3, och 25 × 25 × 100mm3 dessa provs-torlekar valdes baserat på Afshar (2022) och Walley & Rogers (2022). Dockproducerade provstorleken 20 × 20 × 20mm3 otillräckliga resultat på grundav begränsningar i utrustningen för att testa dem under tillräcklig belast-ning. Bland de återstående provgrupperna testades och jämfördes nio provfrån varje grupp när det gäller styvhet och deformation. De experimentellaresultaten gav inte statistiskt signifikanta data som stödjer förekomsten aven märkbar storlekseffekt mellan dimensionerna hos proven 10 × 10 × 10mm3och 25 × 25 × 100mm3.