Thesis (M.A.)--York University, 2002. Graduate Programme in Interdisciplinary Studies. / Typescript. Includes bibliographical references (leaves 167-171). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://wwwlib.umi.com/cr/yorku/fullcit?pMQ71618.

Made available in DSpace on 2016-04-27T16:57:39Z (GMT). No. of bitstreams: 1 Michele Jesus Diniz.pdf: 30556825 bytes, checksum: cc380b50f637b4a38131f260df765e9f (MD5) Previous issue date: 2015-08-10 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / The dissertation presents an analysis of teacher s textbooks, adopted in public schools in a city in Minas Gerais, focusing on the elaboration of the concept of multiplication from the 1st to 5th year of elementary school. The qualitative analysis about 16 multiplication activities, the most part divided in about four tasks, was developed by the match between the National Curriculum Parameters - PCNs, adopted as guidelines by the investigated textbooks and the Theory of Raymond Duval. As a result, we obtained that most of the initial activities involves conversion. Among the other tasks of the activity involves at least one treatment. We also found an activity involving only treatment, and only three activities without tasks involving treatment. Still, we had a proposal in the guidelines to the teacher, promoting conversion in both directions for proper coordination of semiotic representation registers. Most used registers are mixed, involving the numerical record with natural language / A dissertação apresenta uma análise dos Livros da Coleção do Professor, adotados na rede municipal de uma cidade de Minas Gerais, focalizando o processo de elaboração do conceito de multiplicação do 1° ao 5° ano do Ensino Fundamental. A análise, de caráter qualitativo, sobre 16 atividades de multiplicação, subdivididas em cerca de quatro tarefas, em sua maior parte, desenvolveu-se mediante o pareamento entre os Parâmetros Curriculares Nacionais PCNs, adotados como diretrizes no município e a Teoria de Raymond Duval. Como resultados, obtivemos que maior parte das atividades iniciais envolve conversão. Dentre as demais tarefas da atividade ao menos uma envolve tratamento. Encontramos também uma atividade envolvendo apenas tratamento, e apenas três atividades sem tarefas envolvendo tratamento. Ainda, obtivemos uma proposta nas orientações ao professor, promovendo conversão em dois sentidos, para a devida coordenação de registros de representação semiótica. A maior parte dos registros utilizados é misto, envolvendo o registro numérico com o da língua natural

This project examines the intimate role slave claims played in the animosities which quickly developed from the acquisition of the Florida territory to the outbreak of the Second Seminole Indian War. By focusing on the Indian Agency and its first administrator, Gad Humphreys, this connection is made by suggesting that the territory's legislators were unwilling to allow the coexistence of Seminoles and blacks on the Florida frontier. The presence of these communities threatened developing Middle Florida plantations with significantly increased risks of both slave runaways and insurrection. In response, settlers and government officials pressed Humphreys to see not only that the Seminoles were pacified, but also that runaway slaves were apprehended and returned to their owners. The agent, however, held fundamentally different opinions on the subject of adjudicating these controversies than did the citizens under his direction, and his superiors in the War Department. When Humphreys regularly supported Seminole claimants in the often-bitter property contests, his actions were met with the disapproval of his superiors-particularly Governor William Pope DuVal-who felt that his first duty was to ensure the development of the territory's plantations. The claims of Margaret Cook and Mary Hannay, in particular, strained these once respectful relationships to the point where DuVal sought to have Humphreys removed on various charges of misconduct relating to his direction in the controversies. An investigation was initiated into a number of allegations, yet focused on his conduct in slave controversies, and found that far from acting inappropriately, Humphreys had performed his duty with exceptional integrity. Ultimately, however, DuVal's effort was successful. Humphreys was superceded in 1830 by John Phagan-an agent much more willing to take the harsh measures necessary to have the numerous slaves claimed by the territory's citizens surrenders. In examining the actions of Humphreys, the Indians under his charge, and the legislators he reported to, slave claim controversies of the 1822-1830 period clearly illustrate the centrality of the slavery issue on the Florida frontier, and inextricably connect slavery to the outbreak of the Second Seminole Indian War.

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Submitted by JÚLIO HEBER SILVA (julioheber@yahoo.com.br) on 2017-04-10T18:58:09Z No. of bitstreams: 2 Dissertação - Diogo Pereira Veloso - 2017.pdf: 3906692 bytes, checksum: 8d731c4df11a717552eb2bbe8b58f5ea (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-04-11T12:52:13Z (GMT) No. of bitstreams: 2 Dissertação - Diogo Pereira Veloso - 2017.pdf: 3906692 bytes, checksum: 8d731c4df11a717552eb2bbe8b58f5ea (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2017-04-11T12:52:13Z (GMT). No. of bitstreams: 2 Dissertação - Diogo Pereira Veloso - 2017.pdf: 3906692 bytes, checksum: 8d731c4df11a717552eb2bbe8b58f5ea (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2017-02-17 / Power transformers are essential equipment in eletric systems. Considered as highly expensive equipment it requires greater attention regarding the occurrence of failures. A failure on equipment can cause serious trouble to the concessionaire responsible for the generation, transmission and distribution of energy. In the present scenario, where legislation has increased the severity with which oversees these failures and demanding a higher efficiency of the same, it is necessary to create appropriate policies to investigas possible equipment failure. These failures can be caused by several factors, among them, the gases dissolved in the oil due to its degeneration. One of the most used techniques for the diagnosis of power transformers from these dissolved gases is the Duval Triangle, a method that has a precision and considerably high reliability. However, for proper planning of maintenance, avoiding a possible sudden withdrawal and supply cut, it is necessary to provide further information, including a quantitative analysis of the causes of failure and a history of the evolution of the operating status of the machine. To this end it is proposed to use a fuzzy logic by the method of Duval to provide an analysis of the transitions between the diagnostic originally presented to enable monitor the level of relevance of each possible cause for the diagnosis equipment allowing perform scheduled and preventive maintenance. The proposed methodology was validated using real data equipment in operation in the brazilian electric system. / Transformadores de potência são equipamentos essenciais em um sistema elétrico. São considerados equipamentos de alto custo que requerem uma maior atenção no que tange a ocorrência de falhas. Uma falha em um equipamento pode causar sérios prejuízos à concessionária responsável pela geração, transmissão e distribuição de energia. No cenário atual, onde a legislação vem sempre aumentado o rigor com que fiscaliza essas falhas e cobrando uma maior eficiência das mesmas, faz-se necessário criar políticas adequadas para investigas possíveis falhas nos equipamentos. Falhas essas que podem ser originadas por diversos fatores, dentre eles, pelos gases dissolvidos no óleo devido a sua degeneração. Um dos métodos mais utilizados para diagnóstico de transformadores de potência é a análise de gases dissolvidos utilizando o Triângulo de Duval, que apresenta uma precisão e confiabilidade consideravelmente altas. No entanto, para um planejamento adequado de manutenção, evitando uma possível retirada brusca do equipamento e corte no fornecimento, é necessário prover mais informações, incluindo uma análise quantitativa das causas das falhas e um histórico da evolução do estado operativo do equipamento. Para tanto propõe-se a utilização de uma lógica fuzzy junto ao método de Duval para fornecer uma análise das transições entre os diagnósticos apresentados originalmente de forma a permitir acompanhar a evolução do nível de pertinência de cada possível causa no diagnóstico do equipamento, possibilitando realizar manutenções programadas e preventivas. A metodologia proposta foi validada utilizando dados reais de equipamentos em operação no sistema slétrico brasileiro.

Sammanfattning Syftet med denna studie är att synliggöra hur elever formulerar geometriska resonemang med utgångspunkt i vardagliga och vetenskapliga begrepp. Studiens syfte motiveras genom de svårigheter eleverna upplever på grund av detta fenomen. Utifrån studiens syfte har forskningsfrågan formulerats på följande vis: Hur formulerar elever geometriska resonemang med utgångspunkt i vardagliga och vetenskapliga begrepp? 15 elever från två årskurs femmor deltog i studien. Metoden som vi har valt i denna kvalitativa studie är tematisk analys. Resultatet analyserades med hjälp av Duvals (1995) teori om visualisering och kognitiva modell. I resultatet framgår det att elever som formulerar geometriska resonemang med enbart vardagliga begrepp och inte vetenskapliga begrepp begränsar sina möjligheter till att utveckla sina geometriska resonemang. Dessa elever tenderar även att ha större svårigheter att använda vetenskapliga begrepp för att beskriva deras geometriska konstruktioner. / Abstract The purpose of this study is to explore how do students formulate geometric reasoning based on every day and scientific concepts. The purpose of the study is motivated by the difficulties students experience due to this phenomenon. Based on the purpose of the study, the research question has been formulated as follows: How do students formulate geometric reasoning based on every day and scientific concepts? 15 students from two fifth graders participated in the study. The method we have chosen in this qualitative study is thematic analysis. The results were analyzed using Duval's (1995) theory of visualization and cognitive model. The results show that students who formulate geometric reasoning using only every day concepts and not scientific concepts limit their opportunities to develop their geometric reasoning. These students also tend to have greater difficulty using scientific concepts to describe their geometric constructions.

Made available in DSpace on 2017-07-21T20:32:01Z (GMT). No. of bitstreams: 1 Fatima Aparecida Dionizio.pdf: 2825310 bytes, checksum: ba3d8d4570e3c9c391edb2fb0432d6f5 (MD5) Previous issue date: 2013-03-26 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / This study presents an analysis of pedagogical, curricular and content knowledge that teachers of mathematics in basic education, in Ponta Grossa/PR have on Trigonometry. Empirical data was obtained with the use of a tool containing different kinds of errors made by students in Trigonometry exercises to be analyzed and point out possible intervention by the teachers as well as to present responses to Trigonometry concepts. This data was analyzed based on Shulman’s (1986,2001) theoretical contributions and on the functions and discursive operations according to the Register of Semiotic Representation theory by Raymond Duval (2004, 2009, 2011). The research question was: How is knowledge about Trigonometry characterized and what is the nature of the knowledge related to learning issues and Trigonometry teaching presented by mathematics teachers who work in basic education? And the objectives of the study were: to characterize the knowledge of Trigonometry of mathematics teachers working in basic education and; to reveal the nature of mathematics teachers’ knowledge in relation to Trigonometry learning and teaching issues.The research had a qualitative approach, with descriptive and elucidative characteristics, and the analysis methodological procedures were assisted by Bardin’s (2009) content analysis. The organization of data was carried out with the aid of the software Atlas.ti, through which the subject content knowledge, the pedagogical knowledge of content, and the curricular knowledge were gathered within the discourse expansion function proposed by Duval (2004) for later analysis. The results of this study indicate that teachers’ knowledge that was more evident was the knowledge of the subject content. These results point to the need for teachers to be more attentive to other aspects of knowledge also necessary to their education practice and which seem to have been disregarded. / Este trabalho apresenta uma análise dos conhecimentos pedagógicos, curricular e de conteúdo de professores de matemática da Educação Básica, do município de Ponta Grossa/PR, sobre Trigonometria. Os dados empíricos foram obtidos por meio da aplicação de um instrumento contendo diferentes tipos de erros cometidos pelos alunos em atividades de Trigonometria, para a análise e apontamento de possíveis intervenções pedagógicas pelos professores e também respostas a conceitos de Trigonometria. Esses dados foram analisados tendo por subsídios teóricos as contribuições de Shulman (1986, 2001) e as funções e operações discursivas apresentadas na teoria dos Registros de Representação Semiótica segundo Raymond Duval (2004, 2009, 2011). O problema de pesquisa que se buscou responder foi: Como se caracterizam os conhecimentos sobre Trigonometria e qual a natureza dos conhecimentos relativos a questões sobre a aprendizagem e o ensino de Trigonometria apresentados por professores de matemática que atuam na Educação Básica? A partir disso os objetivos da pesquisa foram: caracterizar os conhecimentos sobre Trigonometria apresentados por professores de matemática que atuam na Educação Básica e; desvelar a natureza desses conhecimentos dos professores de matemática em relação a questões sobre o ensino e a aprendizagem da Trigonometria. Para a realização da pesquisa foi adotada a abordagem qualitativa, de cunho descritivo e explicativo, com os procedimentos metodológicos de análise sustentados pela análise de conteúdo de Bardin (2009). A organização dos dados contou com o auxílio do software Atlas.ti por meio do qual foram elencados o conhecimento de conteúdo da matéria, o conhecimento pedagógico de conteúdo e o conhecimento curricular e as funções de expansão dos discursos propostas por Duval (2004), para posterior análise. Os resultados dessa pesquisa indicam que os conhecimentos docentes que se sobressaíram foram os conhecimentos de conteúdo da matéria a ser ensinada. Esses resultados apontam para a necessidade de um olhar mais atento pelos professores sobre os demais saberes necessários à prática educativa e que parecem não estarem sendo postos em prática.

Οι μετασχηματιστές ισχύος αποτελούν τα κρισιμότερα στοιχεία ενός Συστήματος Ηλεκτρικής Ενέργειας από την άποψη κόστους, χρησιμότητας και επικινδυνότητας. Επομένως είναι ιδιαίτερα σημαντικός ο έλεγχος της υγείας των μετασχηματιστών και της λειτουργικής τους ικανότητας. Η παρούσα διπλωματική εργασία ασχολείται με το διαγνωστικό έλεγχο των μεγάλων μετασχηματιστών ελαίου. Για το σκοπό αυτό θεωρείται αναγκαίο να γίνει πρώτα μία αναλυτική αναφορά στους μετασχηματιστές και στις ιδιότητές τους. Στο κεφάλαιο 1 γίνεται μία σύντομη εισαγωγή σχετική με τα Σ.Η.Ε. ώστε να καταστεί σαφής ο ρόλος των μετασχηματιστών σε αυτά. Στο κεφάλαιο 2 περιγράφονται λεπτομερώς οι αρχές λειτουργίας και τα κατασκευαστικά στοιχεία των μετασχηματιστών καθώς και τα προβλήματα που προκύπτουν σε αυτούς εξαιτίας της λειτουργίας τους ή από την πάροδο των ετών. Το κεφάλαιο 3 ασχολείται με τη λειτουργική κατάσταση και τη διάρκεια ζωής των μετασχηματιστών και την εξάρτησή τους από την κατάσταση της μόνωσης. Στο κεφάλαιο 4 παρατίθενται όλες οι κλασικές μέθοδοι που χρησιμοποιούνται για την παρακολούθηση και τη διάγνωση σφαλμάτων στους μετασχηματιστές. Επίσης περιγράφονται η κατάταξη των μετασχηματιστών ανάλογα με την ικανότητά τους να παραμείνουν σε λειτουργία και η ένταξη της παρακολούθησής τους στον έλεγχο του συστήματος. Το κεφάλαιο 5 επικεντρώνεται στη μέθοδο Duval, μία μέθοδο διάγνωσης που συγκαταλέγεται στην κατηγορία των Χημικών Μεθόδων και ειδικότερα της Ανάλυσης των Διαλυμένων Αερίων στο λάδι. Στο κεφάλαιο αυτό γίνεται η περιγραφή της μεθόδου και η παράθεση του προγράμματος που εφαρμόζει τη μέθοδο. Τα παραρτήματα αποσαφηνίζουν κάποιες λεπτομέρειες σχετικές με τη μέθοδο Duval, χρήσιμες για την κατάστρωση του κώδικα. / Power transformers are the most critical components of an Electric Power System (E.P.S.) as far as their cost, usefulness and level of risk are concerned. Therefore their maintenance as well as their health and ability to stay in service check are of great importance. This thesis deals with the diagnostics of large oil immersed transformers. Consequently it is considered necessary to begin with a detailed description of power transformers and their attributes. In Chapter 1 a short introduction of E.P.S. is taking place in order to clarify the role of power transformers in them. In Chapter 2 the principles of operation, the manufacturing elements as well as the malfunctions that occur in a transformer because of their use or in the course of time are described in detail . Chapter 3 deals with the operation condition, life-span and the dependency of a transformer on the insulation system condition. In Chapter 4 all the common used techniques for condition monitoring and fault diagnosis of a transformer are displayed. Furthermore the order of the transformers depending on their ability to maintain in operative condition is described as well as the incorporation of their monitoring in the system inspection. Chapter 5 is focused on the Duval method which is a chemical method for fault diagnosis and more specifically a dissolved gas analysis. In this chapter the Duval method is described in detail along with the description of the program that uses this method. The adjuncts clarify some details regarding the Duval method which are necessary for the comprehension of the program.

Thesis (B.A.)--Princeton University, 1968. / Includes bibliographical references (leaves 131-134).