Submitted by Celso Magalhaes (celsomagalhaes@ufrrj.br) on 2018-08-16T12:41:26Z No. of bitstreams: 1 2017 - Gilmara Gomes da Silva Sarmento.pdf: 3226198 bytes, checksum: a9e31ca9ddfe5109b41c3f49bdb97509 (MD5) / Made available in DSpace on 2018-08-16T12:41:28Z (GMT). No. of bitstreams: 1 2017 - Gilmara Gomes da Silva Sarmento.pdf: 3226198 bytes, checksum: a9e31ca9ddfe5109b41c3f49bdb97509 (MD5) Previous issue date: 2017-09-01 / CAPES / This thesis presents an ethnographic study on the implications of aid in the political configuration of a municipality in the northern Rio de Janeiro state. As a starting point we find that most local politicians were involved in the provision of informal healthcare. There were different mediations to meet the demands of illness and death. Transporting patients to the doctor, getting places in hospitals, scheduling medical appointments or surgeries, helping in speeding up certain procedures, and paying for funeral expenses were some of the activities developed by these politicians. As the field research progressed, the centrality of the health field as an arena for the production of political capital was even more evident, since it was possible to verify that the electoral success of some of these personalities was associated almost exclusively with the assistance activities in this area. For many of these politicians, the reputation thus achieved was the main social resource mobilized as a form of political legitimation. However, insertion in this universe of "assistance" was not as simple as it seemed, because it demanded a certain ethical conduct. This kind of "assistance" could produce politicians, but it could also demoralize them; for while aid in moments of suffering and pain could generate an unpayable moral debt, at the least sign of interest the politician could have his/her reputation ruined, because these domains of life were conceived as nonnegotiable. Hence, this work tries to understand the moral logics that make it possible for practices of aid, favors, and social work in the health area to conform a modality of political entry and reproduction / Esta tese apresenta um estudo etnogr?fico sobre as implica??es da ajuda na configura??o pol?tica de um munic?pio do norte fluminense. Como ponto de partida a constata??o de que a maioria dos pol?ticos locais estava envolvida na presta??o de assist?ncia informal na ?rea de sa?de. Tratava-se de diferentes media??es para dar resolu??o as demandas de enfermidade e de morte. Transportar enfermos ao m?dico, conseguir vagas em hospitais, marcar consultas ou cirurgias, interceder na agiliza??o de determinados procedimentos e pagar despesas funer?rias eram algumas das atividades desenvolvidas por esses pol?ticos. Na medida em que a pesquisa de campo avan?ava, a centralidade do campo da sa?de como arena de produ??o de capital pol?tico ficava ainda mais evidente, pois foi poss?vel constatar que o ?xito eleitoral de algumas dessas personalidades estava associada quase que exclusivamente ?s atividades de assist?ncia nesta ?rea. Para muitos desses pol?ticos, o prest?gio assim conquistado era o principal recurso social mobilizado como forma de legitima??o pol?tica. No entanto, a inser??o neste universo da ?assist?ncia? n?o era t?o simples como parecia, pois demandava determinada conduta ?tica. Esse tipo de ?assist?ncia? podia produzir pol?ticos, mas tamb?m desmoraliza-los, pois ao mesmo tempo em que a ajuda em momentos de sofrimento e dor podia gerar uma d?vida moral impag?vel, ao menor sinal de interesse o pol?tico podia ter a reputa??o arruinada, porque esses dom?nios da vida eram concebidos como inegoci?veis. Sendo assim, a partir deste trabalho tentou-se apreender as l?gicas morais que possibilitavam que pr?ticas de ajuda, favores e trabalho social na sa?de pudessem conformar uma modalidade de entrada e reprodu??o pol?tica

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-09-25T18:06:32Z No. of bitstreams: 1 2013 - Nath?lia Virg?nia da Silva Ribeiro.pdf: 1961349 bytes, checksum: 43e989102153b88ad17a4eefb1e37f9e (MD5) / Made available in DSpace on 2018-09-25T18:06:32Z (GMT). No. of bitstreams: 1 2013 - Nath?lia Virg?nia da Silva Ribeiro.pdf: 1961349 bytes, checksum: 43e989102153b88ad17a4eefb1e37f9e (MD5) Previous issue date: 2013-07-24 / CAPES / The species Jatropha curcas, popularly known as physic nut, belonging to the family Euphorbiaceae, is currently regarded as one of the greatest potential of oil seeds for biodiesel production in the world. However, the knowledge of available genetic variability and productive behavior of the species are still scarce. This work is part of the Breeding Program of Jatropha curcas developed in UFRRJ, and its objective was know some morphological and productive aspects of 10 progenies of physic nut (Jatropha curcas), grown in greenhouse and camp up to 17 months old, selected from female parents belonging to the Germplasm Collection of physic nut (Jatropha curcas) of the Department of Plant Science at the Institute of Agronomy of UFRRJ. It is expected this study provide important information for the continued Breeding Program of the species in UFRRJ. The experiment was installed in October 2011 in greenhouse, and consisted of 10 progenies of physic nut arranged in experimental design randomized blocks with 3 repetitions, and 15 plants by experimental parcel. After 4 evaluation in greenhouse, the plants were transferred to the camp, here were done 6 evaluation, the last being in April 2013. In the greenhouse it was evaluated aspects related to the germination of the progeny and the behavior of young plants. In the first case, it was estimated germination itself progenies and the index of germination speed (IGS), and at the second, the size of the petiole (SMP), number, width and length of fully developed leaves, respectively, discriminated as NDL, WDL and LDL, insertion angle of the leaf (IALs), length relationship and width of leaf (LWL), height of young plants (HYP), stem diameter (SDI) and branches number (BNU). The obtained data were submitted to analysis of variance, mean test via DMS-t and correlation analysis. The coefficient of genotypic determination (H2), of genotypic variation (CVg) and experimental variation (CVe) were also estimated, and variation index (VIg). The mean germination percentage for Jatropha curcas species was 68,23%, and the mean index germination speed was of 8,60 seeds germinated per day. The progeny that reached higher percentage of gemination and higher germination speed were UFRRJ/PM05 (83,33 and 3,12) and UFRRJ/PM01 (83,33 and 3,38). Whereas the progenies UFRRJ/PM10 and UFRRJ/PM04 were the ones with the lowest percentage of germination and germinated more slowly. In the greenhouse was no statistically significant difference between treatments for the variables SMP, NDL, SDI, HYP, BNU, LDL, WDL. Only for LWL and IALs not statistical difference was detected signficativa. In the camp, it was evaluated variables related to morphological and productive. The morphological variables were: insertion angle of the leaf (IALs), height of young plants (HYP), stem diameter (SDI), of branches number (BNU) and the size of the petiole (SMP). Variables related to aspects of production were: fruit number (FNU), average fruit weight (AFW), fruit length (FRL), fruit width (FRW), weight of fruit of the crop (WFC), weight of dries seeds (WDS), seeds number per fruit (SNF=SNU/FNU), seeds number (SNU), seed length (SEL), seed width (SEW), average seed weight (ASW=GPR/SNU) and grain production (GPR= SNUxASW). All data obtained for each stage of treatment in this study were submitted to analysis of variance, mean test way DMS-t and correlation analyzes. Only for the variables related to morphological aspects considered the effect of season in the ANOVA. Were also estimated the coefficient of genotypic determination (H2), genotypic variation (CVg) and experimental variation (CVe), and the variation index (IVg). All variables (morphological and production) were subjected to regression analysis over the 6 collection periods. Was also estimated genetic the following parameters: genetic variance (?2g), additive variance (?2a), heritability of family means, within family, stratified mass and mass in the experiment. The estimation of genetic parameters was based on the last review performed in the experiment, not considering, therefore, the season effect. From previously mentioned analysis it was observed that all the variables related to morphological aspects showed statistically significant differences between treatments. As for variables related to production only FRW, AFW, SEL and ASW no statistically significant difference. Characters related to leaf morphology showed low coefficients of determination and variation index, while the latter parameters were higher for the variables HYP (83,24 e 0,64) e BNU (80,92 e 0,59), respectively, evaluated in plants in a greenhouse. Progenies with the highest mean branches number were UFRRJ/PM07 (0,49) and UFRRJ/PM08 (0,47). In the camp, the BNU variable had the highest coefficient of genotypic determination (84,16) and variation index (0,54) again. Variables SDI, HYP, IALs and BNU showed a linear behavior over the following months, only exception to IALs variable studied in the progeny UFRRJ/PM 10. Variable SMP proved oscillating in all progenies during the months evaluated. Regarding the variables related to production, the progeny had a different behavior between them. Therefore, the selection of these variables are not indicated when you want to increase grain production in physic nut. Only when considering the quantitative variables is that selection for increased production becomes more effective, for example, the selection of the seeds number. The variable branches number (BNU) was positively correlated with almost all variables in the greenhouse and all related to the production characteristics analyzed in the camp, therefore, this variable can be used in precocious selection for increased production in physic nut. The progenies UFRRJ/PM08 and UFRRJ/PM01 were the most promising in respect of seed production, but, evaluation over the years are still needed, as the plants of the experiment were evaluated in still too early to age, and then, physiological and experimental aspects may be being even more important than genetic factors. / A esp?cie Jatropha curcas, popularmente conhecida como pinh?o manso, pertencente ? fam?lia Euphorbiaceae, ? considerada atualmente como uma das oleaginosas de maior potencial para a produ??o de biodiesel no mundo. No entanto, o conhecimento da variabilidade gen?tica dispon?vel e o comportamento produtivo da esp?cie ainda s?o escassos. O presente trabalho ? parte do Programa de Melhoramento Gen?tico de Jatropha curcas desenvolvido na UFRRJ, e teve como objetivo conhecer alguns aspectos morfol?gicos e produtivos de 10 prog?nies de pinh?o-manso (Jatropha curcas), cultivadas em casa de vegeta??o e campo at? aos 17 meses de idade, selecionadas a partir de genitores femininos pertencentes ? Cole??o de Germoplasma de pinh?o-manso (Jatropha curcas) do Departamento de Fitotecnia do Instituto de Agronomia da UFRRJ. Espera-se com este trabalho fornecer informa??es importantes para a continuidade do Programa de Melhoramento da esp?cie na UFRRJ. O experimento foi instalado em outubro de 2011 em casa de vegeta??o, e foi composto por 10 prog?nies de pinh?o-manso dispostas em delineamento em blocos ao acaso com 3 repeti??es, e 15 plantas por parcela experimental. Ap?s 4 avalia??es em casa de vegeta??o, as plantas foram transferidas para o campo, onde foram realizadas 6 avalia??es, sendo a ultima no m?s de abril de 2013. Em casa de vegeta??o avaliou-se aspectos relacionados ? germina??o das prog?nies e o comportamento das plantas jovens. No primeiro caso, estimou-se a germina??o propriamente dito das prog?nies e o ?ndice de velocidade de germina??o (IVG), e no segundo, o tamanho do pec?olo (TMP), n?mero, largura e comprimento de folhas completamente desenvolvidas, respectivamente, discriminados como NFD, LAF e COF, ?ngulo de inser??o da folha (AIFc), rela??o comprimento e largura de folha (CLF), altura de plantas (APJ), di?metro de caule (DIC) e n?mero de ramos (NDR). Os dados obtidos foram submetidos a an?lises de vari?ncia, teste de m?dia via DMS-t e an?lise de correla??o. Tamb?m foram estimados os coeficientes de determina??o genot?pico (H2), de varia??o genot?pico (CVg) e de varia??o experimental (CVe), e o ?ndice de varia??o (IVg). A porcentagem m?dia de germina??o para a esp?cie Jatropha curcas foi de 68,23%, e o ?ndice m?dio de velocidade de germina??o foi de 8,60 sementes germinadas por dia. As prog?nies que atingiram maiores percentuais de gemina??o e maior velocidade de germina??o foram a UFRRJ/PM05 (83,33 e 3,12) e UFRRJ/PM01 (83,33 e 3,38). Enquanto que as prog?nies UFRRJ/PM10 e UFRRJ/PM04 foram as que apresentaram os percentuais de germina??o mais baixos e germinaram mais lentamente. Em casa de vegeta??o houve diferen?a estat?stica significativa entre os tratamentos para as vari?veis TMP, NFD, DIC, APJ, NDR, COF, LAF. Apenas para CLF e AIFc n?o se detectou diferen?a estat?stica signficativa. No campo, avaliou-se vari?veis ligadas aos aspectos morfol?gicos e produtivos. As vari?veis morfol?gicas analisadas foram: ?ngulo de inser??o da folha (AIFc), altura de plantas (APJ), di?metro de caule (DIC), n?mero de ramos (NDR), tamanho m?dio de entren? (MECc). As vari?veis relacionadas aos aspectos de produ??o foram: n?mero de frutos (NFR), peso m?dio do fruto (PFR), comprimento do fruto (CFR), largura do fruto (LFR), peso de frutos da colheita (PFC), peso de sementes secas (PMSs), n?mero de sementes por fruto (NSF = NSE/NFR), n?mero de sementes (NSE), comprimento da semente (CMS), largura da semente (LSE), peso m?dio de sementes (PMS=PSP/NSE) e produ??o de gr?os (PGP=NSExPMS). Todos os dados obtidos para cada tratamento nesta etapa do trabalho foram submetidos ?s an?lises de vari?ncia, teste de m?dia via DMS-t e an?lises de correla??o. Apenas para as vari?veis ligadas aos aspectos morfol?gicos considerou-se o efeito de ?poca na anova. Foram estimados tamb?m os coeficientes de determina??o genot?pico (H2), de varia??o genot?pico (CVg) e de varia??o experimental (CVe), e o ?ndice de varia??o (IVg). Todas as vari?veis (morfol?gicas e de produ??o) foram submetidas a an?lises de regress?o ao longo das 6 ?pocas de coleta. Estimou-se tamb?m os seguintes par?metros gen?ticos: vari?ncia gen?tica (?2g), vari?ncia aditiva (?2a), herdabilidades entre m?dias de fam?lias, dentro de fam?lia, massal estratificada e massal no experimento. A estimativa dos par?metros gen?ticos foi com base na ?ltima avalia??o realizada no experimento, n?o considerando, portanto, o efeito de ?poca. A partir das an?lises anteriormente citadas observou-se que todas as vari?veis ligadas aos aspectos morfol?gicos apresentaram diferen?a estat?stica significativa entre os tratamentos. Quanto as vari?veis relacionadas ? produ??o apenas LFR, PFR, CMS, e PMS n?o apresentaram diferen?a estat?stica significativa. Caracteres relacionados ? morfologia da folha apresentaram baixos coeficientes de determina??o e ?ndice de varia??o, enquanto que estes mesmos par?metros foram altos para as vari?veis APJ (83,24 e 0,64) e NDR (80,92 e 0,59), respectivamente, avaliados em plantas em casa de vegeta??o. As prog?nies que apresentaram as maiores m?dias do n?mero de ramos foram as UFRRJ/PM07 (0,49) e UFRRJ/PM08 (0,47). No campo, a vari?vel NDR apresentou novamente o maior coeficiente de determina??o genot?pico (84,16) e ?ndice de varia??o (0,54). As vari?veis DIC, APJ, AIFc e NDR apresentaram um comportamento linear ao passar dos meses, exce??o apenas para a vari?vel AIFc estudada na prog?nie UFRRJ/PM 10. A vari?vel MECc mostrou-se oscilante em todas as prog?nies durante os meses avaliados. Em rela??o ?s vari?veis ligadas ? produ??o, as prog?nies tiveram um comportamento diferenciado entre si. Todas as vari?veis ligadas aos aspectos morfol?gicos da semente (largura, comprimento e peso m?dio) apresentaram baix?ssima ou nenhuma variabilidade gen?tica entre as prog?nies estudadas. Portanto, a sele??o sobre estas vari?veis n?o s?o indicadas quando se deseja o aumento da produ??o de gr?os em pinh?o-manso. Apenas quando se considera vari?veis de natureza quantitativa ? que a sele??o para o aumento de produ??o torna-se mais efetiva, como por exemplo, a sele??o sobre o n?mero de sementes. A vari?vel n?mero de ramos (NDR) se correlacionou positivamente com quase todas as vari?veis analisadas em casa de vegeta??o e com todos os caracteres relacionados ? produ??o analisados no campo, assim sendo, essa vari?vel pode ser utilizada em sele??o precoce visando o aumento da produ??o em pinh?o-manso. As prog?nies UFRRJ/PM08 e UFRRJ/PM01 foram as mais promissoras no que se refere a produ??o de sementes, por?m, avalia??es ao longo dos anos ainda s?o necess?rias, visto que as plantas do experimento foram avaliadas em idade ainda muito precoce, e portanto, aspectos fisiol?gicos e experimentais podem estar sendo at? mais importantes do que aspectos gen?ticos.

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-09-26T17:50:29Z No. of bitstreams: 1 2013 - Cristiano de Souza Marchesi.pdf: 1452354 bytes, checksum: ec7728b614475bb908da89c09f1ef3eb (MD5) / Made available in DSpace on 2018-09-26T17:50:29Z (GMT). No. of bitstreams: 1 2013 - Cristiano de Souza Marchesi.pdf: 1452354 bytes, checksum: ec7728b614475bb908da89c09f1ef3eb (MD5) Previous issue date: 2013-08-14 / Despite all agricultural production leaving Brazilian soils strength of agribusiness news is that, most of the soils in the country are not classified at the appropriate level for use by the farmer, or better saying, the farms and forest, mostly not have a mapping their soils, so technically mostly producers and professionals working in these properties do not have a detailed knowledge of the types of soils that have worked. The soil classification is the basis for determining the potential use of the land, ie, guide the sustainable use of the same. For this situation, it is known that many factors corroborate the frame. Among these the human factor has great weight in this matter because, Survey and Soil Classification (LCSs) are present on curricular content for training of Agronomists, Forestry Engineers, etc.., and scholars and authorities in the field of Soil Science have signaled that the Higher Education Institutions (specifically undergraduate) come crashing in training these professionals supposedly trained and qualified to the activity of LCSs, considering that the courses that form such professionals invariably advocated among other things "solid scientific general and professional ... "what prescribes the contents of their curricular chord in the National Curriculum Guidelines. Informally today, teachers generally do mind that the problem lies in the structure of undergraduate courses regarding aspects: design of a workload of disciplines; literature indicated in ement?rios; disciplines sequence prerequisites; opportunity of additional knowledge through elective courses, etc.. Thus, sensing data bring to literature that deal with the subject, aimed this work was to analyze the conditions for teaching of LCSs course of Forestry's IFMT - Campus C?ceres through its Political-Pedagogical Project (PPP) as all the above aspects. This research is exploratory, Documentary and Quanti-qualitative nature. Included in the questionnaire data collection and content analysis for inferences. The inferences are that the references (data obtained from educators in the field of Soil Science of the five geographical regions through a questionnaire) indicate that the PPP course has limitations that may affect the teaching-learning LCSs and achieve, in this regard (themes mentioned), the professional profile designed by the course concerning "solid scientific and professional general enabling absorb and develop technology." The limitations were: inadequate sizing workload in disciplines that include LCSs and related activities; literature indicated in these ement?rio not include modern features with the potential to collaborate with a better education, sequence of disciplines inappropriate prerequisites discipline that includes these activities and, lack of opportunity for complementation of knowledge related to these themes via list of electives. Given the paucity of information in the literature that addresses on the subject, the data generated will assist both in the construction and / or reformulation of PPP courses in general as well as instigating research on the topic. / Apesar de toda produ??o agropecu?ria que saem dos solos brasileiros, pujan?a do agroneg?cio que se noticia, a maior parte dos solos do Pa?s n?o est?o classificados a n?vel adequado para utiliza??o do agricultor; ou melhor, dizendo, as propriedades agr?colas e florestais, em sua maioria, n?o possuem um mapeamento de seus solos, logo, majoritariamente produtores e profissionais tecnicamente atuantes nestas propriedades n?o possuem um conhecimento detalhado dos tipos de solos que se t?m trabalhado. A classifica??o dos solos serve de base para determina??o do potencial de uso das terras, ou seja, norteiam a utiliza??o sustent?vel das mesmas. Para esta situa??o, sabe-se que muitos fatores corroboram com o quadro. Dentre estes o fator humano tem grande peso nesta quest?o; pois, Levantamento e Classifica??o de Solos (LCSs) s?o conte?dos presentes nas matrizes curriculares para forma??o de Engenheiros Agr?nomos, Engenheiros Florestais, etc.; e, estudiosos e autoridades da ?rea de Ci?ncia do Solo t?m sinalizado que as Institui??es de Ensino Superior (especificamente cursos de gradua??o) v?m falhando na forma??o desses profissionais pressupostamente capacitados e habilitados para a atividade de LCSs; tendo em vista que, os cursos que formam tais profissionais, invariavelmente, preconizam dentre outras coisas ?s?lida forma??o cientifica e profissional geral...? daquilo que prescreve os conte?dos de suas matrizes curriculares em acorde com as Diretrizes Curriculares Nacionais. Informalmente na atualidade, docentes em geral cogitam que o problema est? na estrutura dos cursos de gradua??o quanto aos aspectos: dimensionamento de carga hor?ria de disciplinas; bibliografia indicada em ement?rios; sequencia de disciplinas pr?-requisitos; oportunidade de complementa??o de conhecimentos via disciplinas optativas, etc. Dessa forma, intuindo trazer dados ? literatura que versem sobre o assunto, objetivou-se com este trabalho analisar as condi??es para atividades de ensino de LCSs do curso de Engenharia Florestal do IFMT - Campus C?ceres atrav?s de seu Projeto Pol?tico-Pedag?gico (PPP) quanto aos aspectos supramencionados. A presente pesquisa ? Explorat?ria, Documental e de natureza Quanti-qualitativa. Incluiu o Question?rio na coleta dos dados e a An?lise de Conte?do para as infer?ncias. As infer?ncias s?o de que as refer?ncias (dados obtidos junto a educadores da ?rea de Ci?ncia do Solo das cinco regi?es geogr?ficas brasileiras atrav?s de question?rio) indicam que o PPP do curso apresenta limita??es que podem comprometer o ensino-aprendizado de LCSs e alcan?ar, neste quesito (tem?ticas mencionadas), o perfil profissional projetado pelo curso concernente a ?s?lida forma??o cient?fica e profissional geral que possibilite absorver e desenvolver tecnologia?. As limita??es encontradas foram: dimensionamento inadequado de carga hor?ria em disciplinas que contemplam LCSs e atividades correlatas; bibliografia indicada no ement?rio destas n?o incluem recursos modernos com potencial de colaborar com uma melhor forma??o; sequ?ncia inapropriada de disciplinas pr?-requisitos a disciplina que contempla estas atividades; e, inexist?ncia de oportunidade para complementa??o dos conhecimentos relacionados a tais tem?ticas via rol de disciplinas optativas. Dado a escassez de informa??es na literatura que trate sobre o assunto, os dados gerados poder?o auxiliar tanto na constru??o e/ou reformula??o de PPP de cursos em geral bem como instigar pesquisas sobre a tem?tica.

Submitted by Jorge Silva (jorgelmsilva@ufrrj.br) on 2018-10-16T18:31:56Z No. of bitstreams: 1 2013 - Diuliano Azeredo Gouv?a.pdf: 3074684 bytes, checksum: 1637a9c9273f537aed4b0b6fadefe6f8 (MD5) / Made available in DSpace on 2018-10-16T18:31:56Z (GMT). No. of bitstreams: 1 2013 - Diuliano Azeredo Gouv?a.pdf: 3074684 bytes, checksum: 1637a9c9273f537aed4b0b6fadefe6f8 (MD5) Previous issue date: 2013-07-17 / CAPES / This study aims to present the importance of the history of mathematics for teaching and learning, seeking to provide opportunities for readers to approach the topic with a historical bias, in order to understand what potential that is replaced when under a historical perspective; it would have with respect to the learning process. To achieve this goal, we conducted an analysis of four (4) textbooks, chosen by PNLD in order to see how these books had the logarithms, it was the presence of the History of Mathematics and presenting this approach as this, suggestions for authors to improve their work. Then we conducted a field study where we applied two questionnaires, one designed for teachers and another for students. In order to get the opinion of these two groups on the approach of logarithms from a bias in the history of mathematics and also to check the view that these two groups have the relationship of mathematics with its own history in loco history of logarithms, as well as open avenues for the emergence of new research. Conducted surveys present our methodology for the analysis of the same. We also made a brief analysis of dissertations related in order to make a reading that was measured and developed by colleagues who studied the same order subject. For analyze the results, we gave our suggestions to create a conclusion about the topic / Este estudo tem como objetivo chamar a aten??o para a import?ncia da Hist?ria da Matem?tica no ensino-aprendizado dos logaritmos, buscando apresentar possibilidades de abordagem do tema com um vi?s hist?rico. Para atingir esse objetivo, realizamos uma an?lise de 4 (quatro) livros did?ticos, escolhidos pelo PNLD, a fim de verificar como esses livros apresentavam os logaritmos, se havia a presen?a da Hist?ria da Matem?tica nesta abordagem no que acreditamos possa ser mais atrativas e adequadas ao ensino deste importante t?pico. Ap?s uma an?lise n?o exaustiva, apresentando, com isso, sugest?es para que os autores possam melhorar suas obras. Realizamos uma pesquisa de campo, onde aplicamos dois question?rios, um destinado para os professores e outro destinado aos alunos. Com o objetivo de obter a opini?o desses dois grupos sobre a abordagem dos logaritmos a partir de um vi?s da hist?ria da Matem?tica e tamb?m de verificar a vis?o que esses dois grupos tem da rela??o da matem?tica com sua pr?pria hist?ria in loco a hist?ria dos logaritmos, assim como abrir caminhos para o surgimento de novas pesquisas. Fizemos tamb?m uma breve an?lise de disserta??es correlatas com objetivo de fazer uma leitura do que foi aferido e desenvolvido por colegas que estudaram o mesmo assunto. Por fim analisamos os resultados, demos nossas sugest?es a fim de criar uma conclus?o sobre o tema abordado.

Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2018-11-23T11:46:06Z No. of bitstreams: 1 2010 - Juliano Br?s Zanetti.pdf: 621874 bytes, checksum: 7668a4e8b8cab8a537ab2b436d55b596 (MD5) / Made available in DSpace on 2018-11-23T11:46:07Z (GMT). No. of bitstreams: 1 2010 - Juliano Br?s Zanetti.pdf: 621874 bytes, checksum: 7668a4e8b8cab8a537ab2b436d55b596 (MD5) Previous issue date: 2010-07-27 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior, CAPES, Brasil. / The production of plant biomass for alternative renewable energy currently represents a great challenge to research. The release of CO2 from its use constitutes only the CO2 recycling that was removed from the atmosphere by photosynthesis, which in the long term, represents a valuable alternative for bio-energy. Elephant grass (Pennisetum purpureum Schum.) is, among grasses, that with possibly the highest capacity for dry matter production, with other favorable characteristics for energy production. The aim of this study was to identify elephant grass genotypes with high biomass production and nitrogen accumulation under the inoculation with a mixture of N2-fixing bacteria. Two studies were conducted in Serop?dica, Rio de Janeiro State. The first experiment was conducted in a concrete tank filled with a Ndeficient Acrisol. The experimental design was randomized blocks in split plots with four replications. The plots consisted of the inoculation treatments (inoculated and uninoculated), and sub-plots for the five elephant grass genotypes: Cameroon, BAG 02, Roxo, Clone CNPGL 93 41 1 and CNPGL 91 F06-3. The second experiment was carried out on a Planosol and the two genotypes, BAG 02 and Cameroon, with inoculation treatments, inoculation + 100 kg of N ha-1, 100 kg of N ha-1 and a zero N control. The experimental design was randomized blocks in a factorial model with four replications. In these studies the following results were obtained: 1. Dry matter production (DM) ranged from 16 to 41 Mg of MS ha-1 year-1 when the varieties were grown in the Acrisol. In the Planosol the dry biomass varied between 48 and 56 Mg MS ha-1 in two crops over a 11-month period of cultivation. 2. In relation to the total N accumulated in shoots, the values ranged between 64 and 158 kg ha-1 when the genotypes were grown in Acrisol and between 297 and 441 kg ha-1 when the genotypes were cultivated in the Planosol. For these parameters, N accumulation and biomass yield, the best genotypes were: CNPGL F 06-3 and Cameroon followed by CNPGL 93 41 1 and BAG 02 genotype. 3. The C/N ratio was directly influenced by soil type, and the ratio observed in the Acrisol was approximately 50% higher when compared to the Planosol. 4. The calorific value and fiber content, cellulose, lignin and ash, which are related to the quality of the material, in general were not affected by genotype, or by treatment. The elephant grass biomass had positive qualitative and quantitative characteristics to be used for renewable energy production and the Cameron CNPGL F 06-3 genotype, followed by BAG CNPGL 93 41 02 genotype were the most promising. The genotypes studied no showed response of biomass production or N accumulation to inoculation with diazotrophic bacteria. / A produ??o de material energ?tico alternativo renov?vel, tal como a biomassa vegetal, representa hoje um dos grandes desafios para a pesquisa. No caso da biomassa, a libera??o de CO2 pelo seu uso representa apenas a reciclagem do CO2 que foi retirado da atmosfera pela fotoss?ntese, indicando que, em longo prazo, esta ser? uma das alternativas energ?ticas mais seguras. O capim-elefante (Pennisetum purpureum Schum.) est? entre as gram?neas de maior capacidade de produ??o de mat?ria seca, com caracter?sticas qualitativas favor?veis para a produ??o de energia. O objetivo deste trabalho foi identificar gen?tipos de capim-elefante para alto rendimento de biomassa, ac?mulo de N sob a inocula??o das plantas com uma mistura de bact?rias diazotr?ficas. Foram realizados dois estudos de campo localizados no munic?pio de Serop?dica, RJ. O primeiro experimento realizado em um tanque de concreto preenchido com Argissolo pobre em N dispon?vel. O delineamento experimental foi o de Blocos ao Acaso em parcelas divididas, com quatro repeti??es. As parcelas constitu?das pelos tratamentos de inocula??o (inoculado e n?o inoculado), e as sub-parcelas compostas pelos cinco gen?tipos de capim-elefante: Cameroon, BAG 02, Roxo, Clone CNPGL 93 41 1 e CNPGL 91 F06-3. No segundo experimento, realizado no campo em um Planossolo, os dois gen?tipos, BAG 02 e Cameroon foram avaliados sob os tratamentos de inocula??o, inocula??o + 100 kg de N.ha-1, 100 kg de N.ha-1, e o controle. O delineamento experimental utilizado foi o de Blocos ao Acaso em esquema fatorial com quatro repeti??es. Nestes estudos encontraram-se os seguintes resultados: 1. A produ??o de mat?ria seca (MS) que variou entre 16 e 41 Mg de MS.ha-1.ano-1, quando os gen?tipos foram cultivados no Argissolo. No Planossolo, o rendimento de biomassa seca variou entre 48 e 56 Mg.MS.ha-1 sob duas colheitas realizadas, em 11 meses de cultivo. 2. Em rela??o ao total de N acumulado na parte a?rea, os valores variaram entre 64 e 158 kg.ha-1 quando os gen?tipos foram cultivados no Argissolo, e entre 297 e 441 kg.ha-1 quando os gen?tipos foram cultivados no Planossolo. Para os par?metros, ac?mulo de N e rendimento de biomassa, os gen?tipos que mais se destacaram foram: CNPGL F 06-3 e Cameroon seguido dos gen?tipos BAG 02 e CNPGL 93 41 1. 3. A rela??o C/N foi influenciada diretamente pelo tipo de solo, sendo que no Argissolo as rela??es encontradas foram em torno de 50% maiores, quando comparadas com o Planossolo. 4. O poder calor?fico e os teores de fibra, celulose, lignina e cinzas, que est?o relacionados ? parte qualitativa do material, em geral, n?o foram influenciados pelos gen?tipos, nem pelos tratamentos avaliados. A biomassa do capim-elefante apresentou caracter?sticas qualitativas e quantitativas positivas para ser utilizado na produ??o de energia renov?vel, sendo os gen?tipos CNPGL F 06-3 e Cameron, seguido dos gen?tipos BAG 02 e CNPGL 93 41 1 os mais indicados. Os gen?tipos em estudo n?o apresentaram resposta para rendimento e acumula??o de N pela biomassa ? inocula??o com bact?rias diazotr?ficas.

Made available in DSpace on 2014-12-17T15:46:25Z (GMT). No. of bitstreams: 1 NeilaKFC_DISSERT.pdf: 1127472 bytes, checksum: 45700f0891858913250d80ad1a492743 (MD5) Previous issue date: 2012-06-30 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / This study examines the determinations of the structural crisis of capital in the democratic control effected on the councils of rights and policies. Therefore the research aimed to apprehend and analyze the conjunctural and structural determinations and cyclical changes that incide on democratic control established by the Federal Constitution of 1988. The specific objectives turned to: (1) identify and analyze the theoretical and political fundamentals of democratic control in the production of social service in ENPESS 2010, in the productions of CFESS and the journal social services and society, (2) apprehend and analyze the possibilities, limits, contradictions and social direction of democratic control in contemporaneity and (3) identify and analyze the major political forces that constitute support and opposition to the exercise of democratic control. To approximate to the intended objectives the way theoretical and methodological covered was based in a perspective of totality that allows the apprehension of the object of study in their contradictory dimensions of universality, particularity and singularity. The results enabled to develop critical analysis of theoretical production of the Brazilian social service on the subject, having as snip studies of the journals social service and society; works of ENPESS 2010 and CFESS positioning. It was found, so in analysis undertaken, the spaces of democratic control suffer inflections of capital that shape their practices and social direction. In theoretical productions chosen, identified the prevalence of democratic control studied under an endogenous perspective to participatory canals, with incipient connections to the structural/conjunctural determinations of a historical period of crisis and seeks to restore the hegemony of capital. The positioning of the CFESS tends to recognition of democratic control in its contradictory dynamics recognizing the limits imposed by the sociability of the capital at the present time / O presente estudo analisa as determina??es da crise estrutural do capital no controle democr?tico efetivado nos conselhos de direitos e pol?ticas. Assim, a pesquisa teve como objetivo geral apreender e analisar as determina??es estruturais e conjunturais que incidem em mudan?as no controle democr?tico institu?do pela Constitui??o Federal de 1988. Os objetivos espec?ficos voltaram-se para: (1) identificar e analisar os fundamentos te?rico-pol?ticos do controle democr?tico nas produ??es do servi?o social no ENPESS 2010, nas produ??es do CFESS e na revista servi?o social e sociedade; (2) apreender e analisar as possibilidades, os limites, as contradi??es e a dire??o social do controle democr?tico na contemporaneidade e (3) Identificar e analisar as principais for?as pol?ticas que se constituem apoio e oposi??o ao exerc?cio do controle democr?tico. Para aproxima??o aos objetivos pretendidos o caminho te?rico-metodol?gico percorrido fundamentou-se numa perspectiva de totalidade que possibilita a apreens?o do objeto de estudo em suas dimens?es contradit?rias de universalidade, particularidade e singularidade. Os resultados possibilitaram desenvolver an?lise cr?tica das produ??es te?ricas do servi?o social brasileiro sobre a tem?tica, tendo como recorte os estudos das revistas servi?o social e sociedade; trabalhos do ENPESS 2010 e o posicionamento do CFESS. Constatou-se, assim, na an?lise empreendida, que os espa?os de controle democr?tico sofrem inflex?es do capital, que moldam suas pr?ticas e dire??o social. Nas produ??es te?ricas escolhidas, identificou-se a preval?ncia do controle democr?tico estudado sob uma perspectiva end?gena aos canais participativos, com conex?es incipientes ?s determina??es estruturais/conjunturais de um per?odo hist?rico de crise e busca de restaura??o da hegemonia pelo capital. O posicionamento do CFESS tende ao reconhecimento do controle democr?tico em sua din?mica contradit?ria reconhecendo os limites impostos pela sociabilidade do capital no tempo presente

Made available in DSpace on 2014-12-17T15:48:11Z (GMT). No. of bitstreams: 1 LigiaBB.pdf: 1036516 bytes, checksum: 36260a287f3ddf0bc38abbb0ec32b82f (MD5) Previous issue date: 2007-02-09 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The Traveling Purchaser Problem is a variant of the Traveling Salesman Problem, where there is a set of markets and a set of products. Each product is available on a subset of markets and its unit cost depends on the market where it is available. The objective is to buy all the products, departing and returning to a domicile, at the least possible cost defined as the summation of the weights of the edges in the tour and the cost paid to acquire the products. A Transgenetic Algorithm, an evolutionary algorithm with basis on endosymbiosis, is applied to the Capacited and Uncapacited versions of this problem. Evolution in Transgenetic Algorithms is simulated with the interaction and information sharing between populations of individuals from distinct species. The computational results show that this is a very effective approach for the TPP regarding solution quality and runtime. Seventeen and nine new best results are presented for instances of the capacited and uncapacited versions, respectively / O Problema do Caixeiro Comprador ? uma variante do Problema do Caixeiro Viajante, onde existe um conjunto de mercados e um conjunto de produtos. Cada produto est? dispon?vel em um subconjunto de mercados e o pre?o da unidade varia de acordo com o mercado. O objetivo ? comprar todos os produtos, partindo e retornando para o dep?sito, de maneira que a soma do custo da rota e dos produtos seja m?nimo. Um Algoritmo Transgen?tico, algoritmo evolucion?rio com base na endosimbiose, ? utilizado para resolver a vers?o Capacitada e N?o Capacitada desse problema. A evolu??o no algoritmo transgen?tico ? simulada com a intera??o e troca de informa??es entre popula??o de indiv?duos de diferentes esp?cies. Os resultados computacionais mostram que a abordagem ? satisfat?ria para o PCC , tanto na qualidade da solu??o, quanto no tempo de execu??o. Dezessete e nove novas melhores solu??es s?o encontradas para o PCC Capacitado e para o PCC N?o Capacitado, respectivamente

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-11-06T19:34:17Z No. of bitstreams: 1 FranciscoClesioMedeirosDantasDeAraujo_DISSERT.pdf: 6231818 bytes, checksum: 76365404d88f5f246477fd970fe58454 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-11-20T20:34:03Z (GMT) No. of bitstreams: 1 FranciscoClesioMedeirosDantasDeAraujo_DISSERT.pdf: 6231818 bytes, checksum: 76365404d88f5f246477fd970fe58454 (MD5) / Made available in DSpace on 2017-11-20T20:34:04Z (GMT). No. of bitstreams: 1 FranciscoClesioMedeirosDantasDeAraujo_DISSERT.pdf: 6231818 bytes, checksum: 76365404d88f5f246477fd970fe58454 (MD5) Previous issue date: 2017-06-21 / Este trabalho prop?e contextualizar a produ??o de sal marinho com temas relacionados ao ensino de Geografia em escolas do ensino m?dio situadas no litoral setentrional do estado do Rio Grande do Norte, onde se localizam os munic?pios com a maior produ??o salineira do Brasil. Essa proposta se deu por meio de uma instrumenta??o did?tica-pedag?gica textual, com a elabora??o de um livro paradid?tico, explanando-se os temas naturais e humanos de forma interdisciplinar e transversal. A pesquisa partiu de observa??es emp?ricas em rela??o a tem?tica da ind?stria salineira que envolve v?rios conte?dos trabalhados no componente curricular Geografia que poderiam ser trabalhados por professores da educa??o b?sica. Primeiramente foram realizadas reuni?es com a coordena??o pedag?gica (diretoria, coordenador e professores), seguidas da elabora??o do material did?tico-textual (produto educacional proposto), o qual se deu a partir de um processo construtivo e dialogado ao longo de 04 (quatro) oficinas did?tica-pedag?gicas com os discentes. Nessas oficinas foram discutidos conte?dos associados diretamente ao tema proposto, como a import?ncia hist?rica, ambiental, econ?mica e cultural das salinas da regi?o. Finalizando-se com uma aula de campo na Salina Unidos (Macau-RN). As interven??es realizadas na escola confirmaram a subutiliza??o da tem?tica nas aulas de Geografia, possibilitando uma ampla discuss?o sobre sua inser??o no curr?culo escolar. Verificou-se que atrav?s do tema escolhido para esse trabalho, as diversas categorias de an?lises espaciais podem ser estudadas de forma que haja uma intera??o e uma transversalidade entre os conhecimentos pr?vios dos alunos, firmados a partir de seu lugar de viv?ncia, com os principais acontecimentos, fen?menos e transforma??es do Espa?o Geogr?fico nas escalas regional, nacional e global, dentro dos conte?dos, habilidades e compet?ncias esperados para a forma??o dos estudantes. / This work proposes to contextualize the production of sea salt with themes related to the teaching of geography in high schools located on the northern coast of the state of Rio Grande do Norte, where the municipalities with the largest salt production in Brazil are located. This proposal was made through a didactic-pedagogical instrumentation textual, with the elaboration of a paradid?tico book, explaining the natural and human subjects in an interdisciplinary and transversal way. The research was based on empirical observations in relation to the saline industry that involves several contents worked in the Geography component that could be worked by teachers of basic education. Firstly, meetings were held with the pedagogical coordination (board, coordinator and teachers), followed by the elaboration of the didactic-textual material (proposed educational product), which was based on a constructive process and dialogued along 04 (four) workshops Pedagogical with the students. In these workshops, content related directly to the proposed theme was discussed, such as the historical, environmental, economic and cultural importance of the salinas of the region. Finishing with a field lesson in Salina Unidos (Macau-RN). The interventions carried out at the school confirmed the underutilization of the subject in the Geography class, allowing a wide discussion about its insertion in the school curriculum. It was verified that through the theme chosen for this work, the various categories of spatial analysis can be studied in a way that there is an interaction and transversality between the students' previous knowledge, based on their place of living, with the main events, phenomena and transformations of the Geographic Space at the regional, national and global scales, within the contents, skills and competences expected for the formation of the students.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-12-04T20:35:34Z No. of bitstreams: 1 HugoMansoJunior_DISSERT.pdf: 6247259 bytes, checksum: 1ee8a37c5208fe66b06be4e067a57717 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-12-06T21:57:04Z (GMT) No. of bitstreams: 1 HugoMansoJunior_DISSERT.pdf: 6247259 bytes, checksum: 1ee8a37c5208fe66b06be4e067a57717 (MD5) / Made available in DSpace on 2017-12-06T21:57:04Z (GMT). No. of bitstreams: 1 HugoMansoJunior_DISSERT.pdf: 6247259 bytes, checksum: 1ee8a37c5208fe66b06be4e067a57717 (MD5) Previous issue date: 2017-07-31 / O presente trabalho ? produto de uma pesquisa bibliogr?fica e de an?lise documental que teve por objetivo principal analisar os contextos pol?tico e educacional no Campus Natal ? Central do Instituto Federal de Educa??o, Ci?ncia e Tecnologia do Rio Grande do Norte (CNat?IFRN), quando da publica??o da Lei n? 11.892 de 29 de dezembro de 2008. Tomando a fase final da ditadura militar e a transi??o ? democracia como refer?ncia inicial, o texto percorre tr?s institucionalidades, da Escola T?cnica Federal do Rio Grande do Norte (ETFRN) ao Instituto Federal de Educa??o, Ci?ncia e Tecnologia do Rio Grande do Norte (IFRN), passando pelo Centro Federal de Educa??o Tecnol?gica (CEFET?RN). Como objetivos espec?ficos o trabalho procurou fazer um breve resgate hist?rico da educa??o profissional no Brasil; analisar os antecedentes ? cria??o dos Institutos Federais e avaliar seus impactos no CNat-IFRN. Discute-se o contexto pol?tico do per?odo em que s?o criados os Institutos Federais e suas permanentes disputas pelos rumos do pa?s, que se refletem na pol?tica educacional permeada por descontinuidades em sua orienta??o e legisla??o. Com a vit?ria de Luiz In?cio Lula da Silva, o novo governo (2003-2010) manteve-se num equil?brio inst?vel entre as pol?ticas neoliberais, instaladas no Brasil na d?cada de 1990 e os seus compromissos hist?ricos, em especial desde a funda??o (1980) e a formula??o do programa democr?tico e popular do Partido dos Trabalhadores em 1987. Percorridos os objetivos do trabalho, pode-se afirmar que a conjuntura que envolve a transi??o da ETFRN para o IFRN, ? pautada por crises e disputas pol?ticas. Crise do modelo neoliberal de domina??o econ?mica e ideol?gica no plano internacional e de profundas disputas pol?ticas no pa?s. Os resultados apontam que, apesar da positividade da expans?o da Rede Federal, a partir de 2003, n?o se produziu uma nova institucionalidade que viesse a alterar a dualidade estrutural entre a educa??o proped?utica e a educa??o profissional no pa?s, cabendo o desafio ao CNat-IFRN de aprofundar sua forma??o profissional, em v?rios n?veis, em di?logo mais permanente com a rede estadual de ensino m?dio do Rio Grande do Norte. / The present work is the product of a bibliographical research and documentary analysis that had as main objective to analyze the political and educational contexts in the Campus Natal - Central of the Federal Institute of Education, Science and Technology of Rio Grande do Norte (CNat-IFRN), when of the publication of Law No. 11,892 of December 29, 2008. Taking the final phase of the military dictatorship and the transition to democracy as an initial reference, the text goes through three institutions, from the Federal Technical School of Rio Grande do Norte (ETFRN) to Federal Institute of Education, Science and Technology of Rio Grande do Norte (IFRN), through the Federal Center for Technological Education (CEFET-RN). As specific objectives the work sought to make a brief historical rescue of the professional education in Brazil; analyze the background to the creation of the Federal Institutes and evaluate their impacts on CNat-IFRN. It discusses the political context of the period in which the Federal Institutes are created and their constant disputes over the country's directions, which are reflected in educational policy permeated by discontinuities in its orientation and legislation. With the victory of Luiz In?cio Lula da Silva, the new government (2003-2010) remained in an unstable balance between the neoliberal policies established in Brazil in the 1990s and its historical commitments, especially since the foundation (1980) and the formulation of the democratic and popular program of the Workers' Party in 1987. Once the objectives of the work have been fulfilled, it can be said that the conjuncture that involves the transition from ETFRN to the IFRN is marked by crises and political disputes. Crisis of the neoliberal model of economic and ideological domination at the international level and of deep political disputes in the country. The results indicate that, despite the positivity of the expansion of the Federal Network, as of 2003, there was no new institutionality that would alter the structural duality between propaedeutic education and professional education in the country, with the challenge of CNat-IFRN deepen their professional training, at various levels, in a more permanent dialogue with the state high school network of Rio Grande do Norte.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-12-12T18:27:28Z No. of bitstreams: 1 AngelinneCostaAlexandrino_TESE.pdf: 3367753 bytes, checksum: c56321a7ee935dea3023d07d501a15bd (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-12-13T20:12:54Z (GMT) No. of bitstreams: 1 AngelinneCostaAlexandrino_TESE.pdf: 3367753 bytes, checksum: c56321a7ee935dea3023d07d501a15bd (MD5) / Made available in DSpace on 2017-12-13T20:12:54Z (GMT). No. of bitstreams: 1 AngelinneCostaAlexandrino_TESE.pdf: 3367753 bytes, checksum: c56321a7ee935dea3023d07d501a15bd (MD5) Previous issue date: 2017-09-29 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / H? d?cadas que a produ??o de combust?veis alternativos visando ? substitui??o do petr?leo e de seus derivados tem despertado o interesse de muitos pesquisadores em todo o planeta. Biodiesel ? uma alternativa renov?vel, o qual pode ser produzido a partir de ?leos residuais, gorduras animais e ?leos vegetais atrav?s do processo de transesterifica??o heterog?nea utilizando ?lcoois. Nesse contexto, catalisadores heterog?neos t?m se apresentado como potencial na produ??o de biodiesel em raz?o da possibilidade do seu reuso e por ser um processo mais limpo e eficiente. No presente trabalho, carv?o ativado obtido da pir?lise do lodo de esgoto (C.A), Mo2C, Mo2C/C.A e Ni (20%)-Mo2C/C.A foram avaliados no processo de transesterifica??o met?lica do ?leo de soja refinado visando ? produ??o de biodiesel. O carv?o do lodo foi tratado com o KOH no sentido de abrir os poros e promover maior ?rea especifica de contato, seguido de ativa??o f?sica. Os catalisadores a base de molibd?nio foram sintetizados a partir da rea??o g?s-s?lido utilizando como precursor heptamolibdato de am?nio e uma mistura de CH4/H2. Todos os materiais foram caracterizados utilizando as an?lises de TG, DRX, FRX, MEV, B.E.T e granulometria a laser. O processo de transesterifica??o foi avaliado em um reator de mistura constitu?do de um sistema de aquecimento e refluxo da fase alco?lica. Em temperatura constante de 65 oC, as condi??es operacionais estudadas para a rea??o foram: a natureza e concentra??o m?ssica (1 a 5%) do catalisador em rela??o ? massa do ?leo, a raz?o molar ?leo/?lcool (1/6 a 1/18), o pH do meio reacional (2,0 a 8,5), o tempo de rea??o (3 e 5 h) e a velocidade de agita??o da fase l?quida (450 e 600 rpm). Para todas as condi??es e demais catalisadores, o biodiesel foi produzido. A convers?o m?xima do ?leo de soja encontrada foi de 27,34%, no estudo cin?tico, para o catalisador Mo2C/C.A nas condi??es operacionais de 1% de catalisador, 6 h de rea??o, raz?o molar ?leo/?lcool de 1/12 e pH = 5. Na an?lise de caracteriza??o de uma amostra de biodiesel produzido o ponto de fulgor apresentou valor de 141 ?C, o qual est? acima do m?nimo especificado pela ANP. Um modelo cin?tico pseudo homog?neo foi utilizado, para o catalisador Mo2C/C.A atrav?s do qual foi mostrado que os resultados experimentais se ajustaram satisfatoriamente a uma cin?tica de 1? ordem, cuja constante cin?tica de velocidade teve como valor 0,0009 min-1. / For decades, the production of environment-friendly fuels, as alternative power sources for oil, has gained attention and interest of researchers worldwide. Biodiesel is a renewable alternative fuel that can be obtained from residual oils, animal fat and vegetable oils through heterogeneous transesterification reaction using alcohol. In this context, heterogeneous catalyst present potential for biodiesel production as they can be regenerated and provide a cleaner and more efficient process. In this work, several molybdenum carbide catalysts were tested for the transesterification reaction of soybean oil with methanol towards producing biodiesel. These catalysts were pure Mo2C, Mo2C supported over activated carbon (A.C), pure A.C and bimetallic Ni (20%)-Mo2C/A.C being this support produced from sewage sludge pyrolysis. The pyrolysis product was treated with KOH, in order to increase its porosity and promote a larger specific surface area, and later physically activated. Gas solid reaction with CH4 and H2 atmosphere was used to produce the studied molybdenum derived catalysts, and ammonium molybdate was used as molybdenum source in all cases. All catalysts were characterized in a TG, XDR, XFR, SEM, B.E.T and laser particle size analysis basis. Their activity towards transesterification reaction was evaluated by using a mixing reactor with temperature control and alcohol reflux at 65 ?C. The parameters that were manipulated for this experimental evaluation were: type and mass concentration of the catalyst (1 to 5%), oil/alcohol ratio (1/6 to 1/18), pH (2.0 to 8.5), reaction time (3 and 5h) and liquid phase agitation speed (450 and 600 rpm). For all conditions and other catalysts, biodiesel was produced. The maximum conversion found was 27.34% for the Mo2C/A.C catalyst under the operating conditions of 1% catalyst, 6 h reaction, oil/alcohol ration of 1/12 and pH = 5. In the characterization analysis of a sample of biodiesel produced the flash point presented a value of 141 ?C, which is above the minimum specified by the ANP. A pseudo homogeneous kinetics model was used, and experimental data presented agreement with a 1st order reaction with speed rate constant of 0,0009 min-1.