Made available in DSpace on 2014-12-17T14:52:34Z (GMT). No. of bitstreams: 1 MarcioHYR.pdf: 1365314 bytes, checksum: 997a384287afcd1b1b44ac67d772cde2 (MD5) Previous issue date: 2007-07-03 / The quarrel on the urban intensific use of determined areas of the city is carried through in some levels of the society, which had to the fact to bring direct influences the population that inhabits it. The question to become an area to intensific use, implies in determining that the local infrastructure has the capacity to take care of to a bigger amount of people, inhabitants or passers-by. In the quarter of Ponta Negra, in Natal city (state of RN), its condition of area to intensific use to the municipal Law 27/2000 happened due that it starts to allow a bigger level of occupation of part of the quarter. This law has a direct relation with the installation of a complementary infrastructure in the quarter, to put does not send to its complementation and maintenance, what it takes the consequences that are felt by the population. This work has as main objective the identification of the decurrent significant consequences of the creation of Ponta Negra s Intensific Use Zone, according to vision of the population of the quarter. The way followed for this involves the compatible bibliography research with the subject, analysis of documents that treat on the quarter, mappings of the area in search of a physical characterization and mainly, an application of questionnaire next to local population. In this questionnaire it is the main point of the necessary collection of data to the work, indicating the point of view of the population not only on the negative points, but also on the positive points that had happened since the creation of Intensific Use Zone. The answers indicate problems of natures social, infrastructure and enviromental, compatible with the problems of other areas that had passed the same for process, as point the studied bibliography, indicating imperfections in the planning process and maintenance of Ponta Negra s Intensific Use Zone / A discuss?o sobre o adensamento urbano de determinadas ?reas da cidade ? realizada em v?rios n?veis dentro da sociedade, devido ao fato de trazer influ?ncias diretas a popula??o que a habita. A quest?o de tornar uma ?rea adens?vel, implica em determinar que a infra-estrutura local tem a capacidade de atender a uma quantidade maior de pessoas, moradores ou passantes. No bairro de Ponta Negra, na cidade de Natal/ RN, sua condi??o de ?rea adens?vel aconteceu devido a Lei municipal 27/2000 que passa a permitir um maior n?vel de ocupa??o de parte do bairro. Esta lei tem uma rela??o direta com a instala??o de uma infra-estrutura complementar no bairro, porem n?o remete a sua complementa??o e manuten??o, o que leva a conseq??ncias que s?o sentidas pela popula??o. Este trabalho tem como principal objetivo a identifica??o das conseq??ncias significativas decorrentes da cria??o da Zona Adens?vel de Ponta Negra, segundo a vis?o da popula??o do bairro. O caminho seguido para isto envolve a pesquisa de bibliografia compat?vel com o tema, an?lise de documentos que tratem sobre o bairro, mapeamentos da ?rea em busca de uma caracteriza??o f?sica e principalmente, uma aplica??o de question?rio junto a popula??o local. Neste question?rio est? o principal ponto da coleta de dados necess?ria ao trabalho, indicando o ponto de vista da popula??o n?o apenas sobre os pontos negativos, mas tamb?m sobre os pontos positivos que aconteceram desde a cria??o da Zona Adens?vel. As respostas indicam problemas de natureza social, infra-estrutura e ambiental, compat?veis com os problemas de outras ?reas que passaram pelo mesmo processo, conforme aponta a bibliografia estudada, indicando falhas no processo de planejamento e manuten??o da Zona Adens?vel de Ponta Negra

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-08-25T20:36:05Z No. of bitstreams: 1 AnthonietaLoomanMafra_TESE.pdf: 7149877 bytes, checksum: 37e90bc1712437d5b05c2e8a6905a340 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-08-25T23:34:49Z (GMT) No. of bitstreams: 1 AnthonietaLoomanMafra_TESE.pdf: 7149877 bytes, checksum: 37e90bc1712437d5b05c2e8a6905a340 (MD5) / Made available in DSpace on 2016-08-25T23:34:49Z (GMT). No. of bitstreams: 1 AnthonietaLoomanMafra_TESE.pdf: 7149877 bytes, checksum: 37e90bc1712437d5b05c2e8a6905a340 (MD5) Previous issue date: 2015-07-31 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Em geral, homens e mulheres procuram por caracter?sticas em seus parceiros que possam aumentar seu sucesso reprodutivo. Por?m, a escolha de um parceiro rom?ntico n?o se baseia apenas no que o indiv?duo deseja em um parceiro, mas ele leva em considera??o a forma como ele se percebe dentro de determinado ambiente, de modo que a autoavalia??o pode mudar de acordo com o contexto no qual o sujeito est? inserido. Al?m do ambiente, a autoestima pode ser um fator que modifica as prefer?ncias de parceiros rom?nticos e a forma com a qual as pessoas escolhem estes parceiros por poder influenciar na maneira com que as pessoas se avaliam. A maioria dos estudos que deram origem a padr?es hoje considerados universais no estudo de escolha de parceiro rom?ntico foi realizado com universit?rios, o que pode limitar a abrang?ncia das conclus?es por contemplar pessoas de mesmo n?vel educacional e provavelmente mesmo n?vel socioecon?mico (SES). A presente pesquisa, realizada no Brasil, onde a taxa de desigualdade social elevada, e parte no Canad? teve como objetivo verificar as prefer?ncias e escolhas de parceiros rom?nticos e autoavalia??o como parceiro rom?ntico em diferentes n?veis educacionais e SES. Homens, principalmente de baixo SES, tendem a dar prioridade a status social quando procurando por uma parceira rom?ntica, enquanto o padr?o universal ? a prefer?ncia por atratividade f?sica, e mulheres de baixo SES parecem ter conhecimento dessa prefer?ncia de homens de baixo SES ao expressarem que status social ? importante para sua autoavalia??o. Adicionalmente, os resultados corroboraram a influ?ncia do contexto, da autoestima e do SES na autopercep??o como parceiro rom?ntico, embora os dois ?ltimos pare?am modular como se d? a influ?ncia do contexto sobre a autopercep??o dos participantes. Al?m disso, a presente pesquisa tamb?m indicou que as prefer?ncias parecem representar as escolhas para as caracter?sticas mais 6 importantes para cada sexo, sendo as demais caracter?sticas moduladas provavelmente pela qualidade de parceiros dispon?veis no ambiente. / In general, men and women look for characteristics that can indicate improvement of their reproductive success in their romantic partners. However, partner choice is not only based on what the individual want in a partner, but he/she also takes into consideration how they perceive themselves in a determined environment, in a way that self-perception can change according to the context where the individual is inserted in. Besides the environment, self-esteem can be a factor that modifies romantic partner preferences and the way that people choose these partners for being able to influence how people evaluate themselves. Most of the studies that originate today?s universal standards in the study of romantic partner were conducted with undergraduate students, which may limit the coverage of the conclusions for contemplating people of the same educational level and probably also socioeconomic status (SES). The present research, held in Brazil, where the social inequality rate is high, and part in Canada, country with low social inequality, had as goal verifying romantic partners preferences and choices and self-evaluation as romantic partners in different educational level and SES. Men, mainly of low SES, tend to prioritize social status when looking for a romantic partner while the universal pattern is the preference for physical attractiveness, and women of low SES seem to be aware of this preference when expressing that social status is important for their self-perception. In addition, the results corroborate the influence of the context, selfesteem, and SES in the self-perception as a romantic partner, though the latter two appear to modulate how the is the influence of the context on participants? perception. Moreover, this research also indicated that the preferences appear to represent the choices for the most important characteristics for each sex, being the other characteristics probably modulated by the quantity of available participants in the environment.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-10-14T21:35:45Z No. of bitstreams: 1 SilviaAparecidaDeOliveiraDeAlencarMatos_DISSERT.pdf: 7293599 bytes, checksum: 1008edea07585b4c75bbe9da97c7d749 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-10-14T21:47:54Z (GMT) No. of bitstreams: 1 SilviaAparecidaDeOliveiraDeAlencarMatos_DISSERT.pdf: 7293599 bytes, checksum: 1008edea07585b4c75bbe9da97c7d749 (MD5) / Made available in DSpace on 2016-10-14T21:47:54Z (GMT). No. of bitstreams: 1 SilviaAparecidaDeOliveiraDeAlencarMatos_DISSERT.pdf: 7293599 bytes, checksum: 1008edea07585b4c75bbe9da97c7d749 (MD5) Previous issue date: 2014-08-26 / Motivados pela descoberta em literatura de que usu?rios revelavam relut?ncia em comprar via aplicativos m?veis (m-commerce) em smartphones, tivemos como primeira inten??o utilizar a t?cnica de Avalia??o Cooperativa com usu?rios para investigar a usabilidade nestes ambientes de compra. Uma das etapas da Avalia??o Cooperativa ? a elabora??o de uma lista de tarefas que o usu?rio deve realizar para avaliar a interface. Fez-se necess?rio, ent?o, definir as tarefas que deveriam compor a avalia??o de usabilidade. Procuramos, sem ?xito, um processo de compra em aplicaivos para smartphones a fim de definir quais tarefas deveriam ser testadas pelos usu?rios. Encontramos, em literatura, somente processos de compra para sites. Com a participa??o de usu?rios adaptamos, ent?o, um dos processos de compra para sites ao contexto do site da Livraria Saraiva, objeto eleito para viabilizar o nosso estudo. Com este novo processo de compra para o contexto do site da Livraria Saraiva, verificamos se as etapas de compra eram correspondentes ?quelas referentes ao aplicativo m?vel para smartphones da mesma livraria. Verificadas as discrep?ncias, finalmente propusemos, junto com usu?rios, um processo de compra m?vel em aplicativos para smartphones no ambiente da Livraria Saraiva. A partir deste diagrama, fizemos uma Avalia??o Cooperativa no aplicativo de m-commerce da referida livraria. Este trabalho resultou na elabora??o, com a participa??o dos usu?rios, de um processo de compra considerando as etapas de compra que refletissem a forma de comprar dos usu?rios, quando est?o diantes da interface de aplicativos m?veis de m-commerce desenvolvidas para smartphones, o que orientou a avalia??o da usabilidade na interface do aplicativo m?vel de m-commerce da Livraria Saraiva e, poder? servir a outros estudos, tanto como base metodol?gica quanto como diagrama de aplica??o em interfaces an?logas. Ainda, os resultados nos fizeram concluir que incluir os usu?rios na avalia??o de interfaces deve, se poss?vel, tamb?m pressupor a inclus?o dos mesmos no ajuste dos par?metros dos instrumentos que ser?o usados na avalia??o. ABSTRACT: We were motivated to do this work because we have found in literature about m?commerce most users revealed reluctance to buy via mobile applications in smartphones. At first we meant to use the technique of cooperative evaluation with users to investigate the usability of these shopping environments in mobile applications to smartphones. One of the steps of cooperative evaluation is the preparation of a tasks list which the user must do to evaluate the interface. It was necessary, then, to define the tasks which should compose the usability evaluation. A purchasing process in applications for smartphones was seeked, unsuccessfully, in order to define which tasks should be tested by the users. In the wide information source we only found site?s process of purchase. We made some changes for sites in the purchasing context of the site of Saraiva Bookstore with the participation of users, then, the elected object to enable this study. With this new diagram for the context of Saraiva Bookstore's site, it was checked if the steps were corresponding in the mobile application for smartphones of the same bookstore. The discrepancies were verified and it was proposed, with the users, a diagram for the purchasing process in applications for smartphones in Saraiva bookstore's shopping environment. Based on this diagram we have defined which tasks should be tested by users and the cooperative evaluation was made in the application of m-commerce of this bookstore. This work led to the development, with the users, of a diagram with purchasing steps and these steps reflected the way users purchase when they were faced to m-commerce mobile applications developed for smartphones. The purchase process diagram guided the cooperative evaluation with the application of m?commerce studied and helped us to conclude that including users in the evaluation of interfaces should, if possible, also mean to include them in the construction of their own instruments. This led to the develop steps of purchasing process, with the participation of the users considering buying which reflected the way users buy when they have to use m?commerce applications developed for smartphones mobile interface and this guided the evaluation of the usability of mobile application m-commerce Saraiva interface. This study may be applied to other studies, both as a methodological basis and as well as a diagram analogous application interfaces. Still, the results have made us conclude including users in the evaluation of interfaces should, if possible, also assume their inclusion in adjusting the parameters of the instruments which will be used in the evaluation of the interface.

Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-19T13:34:45Z No. of bitstreams: 5 hil.pdf: 1837336 bytes, checksum: 915b40a5d9c4387507e76471c6ae2ca7 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2110 bytes, checksum: b4c884761e4c6c296ab2179d378436d4 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-02-20T11:01:25Z (GMT) No. of bitstreams: 5 hil.pdf: 1837336 bytes, checksum: 915b40a5d9c4387507e76471c6ae2ca7 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2110 bytes, checksum: b4c884761e4c6c296ab2179d378436d4 (MD5) / Made available in DSpace on 2015-02-20T11:01:25Z (GMT). No. of bitstreams: 5 hil.pdf: 1837336 bytes, checksum: 915b40a5d9c4387507e76471c6ae2ca7 (MD5) license_url: 52 bytes, checksum: 3d480ae6c91e310daba2020f8787d6f9 (MD5) license_text: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) license.txt: 2110 bytes, checksum: b4c884761e4c6c296ab2179d378436d4 (MD5) Previous issue date: 2013-02-20 / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / Para a manuten??o das pr?ticas econ?micas e s?cio-culturais constru?das sobre a explora??o e transforma??o do petr?leo, faz-se necess?rio criar alternativas que n?o rompam de forma estanque com as pr?ticas industriais hoje vigentes. Nesse contexto, o uso de biomassas para a produ??o de combust?veis l?quidos que alimentem motores ? combust?o permite sustentar pr?ticas antigas com novos benef?cios. Dessa forma, a presente disserta??o teve por objetivo avaliar o potencial da torta de maca?ba, um coproduto da ind?stria de ?leos vegetais, como insumo para produ??o de bioetanol. Tal objetivo foi trabalhado atrav?s de estudos de sacarifica??o da torta de maca?ba com posterior processo fermentativo. A biomassa em quest?o foi caracterizada quimicamente, o que indicou a presen?a de aproximadamente 50% de carboidratos, distribu?dos em, 23,16 ? 0,95 % de amido, 11,49 ? 1,08% de celulose, 9,6 ? 0,79% de hemicelulose e 11,48 ? 0,62 % de a??cares sol?veis. Para a primeira interven??o da despolimeriza??o dos polissacar?deos presentes na torta de maca?ba foi realizado um planejamento experimental fatorial 25-1 com 5 fatores e 4 pontos centrais com as seguintes vari?veis: concentra??o de ?cido sulf?rico, tempo de pr?-tratamento ?cido, raz?o s?lido/l?quido, concentra??o de amiloglicosidase e concentra??o de celulase. Na sequ?ncia, o processo de sacarifica??o foi otimizado com o uso de delineamento composto central rotacional 23, com 3 fatores, 4 pontos centrais e 6 pontos axiais, onde foram avaliadas as concentra??es de ?cido sulf?rico, amiloglicosidase e celulase. Um hidrolisado obtido em condi??o otimizada com 92% de efici?ncia foi submetido ? destoxifica??o com carv?o ativado e, em seguida, foram realizados ensaios de fermentabilidade conduzidos como as leveduras Saccharomyces cerevisiae e Pichia stipitis. A levedura S. cerevisiae se mostrou resistente ao hidrolisado n?o destoxificado, apresentando YP/S de 0,49. P. stipitis mostrou-se suscept?vel ao meio n?o destoxificado, mas foi capaz de converter 99% dos a??cares redutores presentes no meio destoxificado. A torta de maca?ba apresentou potencial consider?vel para produ??o de bioetanol. A partir dos dados de bancada ? poss?vel estimar uma produ??o de 104l de etanol por tonelada de torta de maca?ba. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Qu?mica, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2011. / ABSTRACT For the maintenance of economic and socio-cultural practices built on the exploitation and processing of oil it is necessary to create alternatives that do not break so tight with current industrial practices. In this context, the use of biomass to produce liquid fuels that are fed into to combustion engines allows to sustain old practices with new benefits. Thus, this dissertation aimed to evaluate the potential of macaw palm coconut cake, a co-product of vegetable oil industry, as an input for bioethanol production. This goal was worked out through studies of the process of saccharification of macaw palm coconut cake with subsequent fermentation. The biomass in question was characterized chemically, what indicated the presence of approximately 50% of carbohydrates, among which, 23,16 ? 0,95% of starch, 11,49 ? 1,08% of cellulose, 9,6 ? 0,79% of hemicellulose and 11,48 ? 0,62% of soluble sugars. For the first intervention of deconstruction of the polysaccharides present in the macauba cake it was held a 25-1 factorial experimental design with five factors and four central points with the following variables: concentration of sulfuric acid, time of acid pretreatment, solid / liquid ratio, amyloglucosidase and cellulose concentrations. Following, the saccharification process was optimized using central composite rotational design 23, with three factors, four central points and six axial points, whereas the concentrations of sulfuric acid, cellulose and amyloglucosidase were evaluated. A hydrolyzed obtained in optimum condition with 92% efficiency was subjected to detoxification with activated charcoal and then, fermentability assays were carried out with yeasts Saccharomyces cerevisiae and Pichia stipitis. The yeast S. cerevisiae has proved resilient to the non-detoxified hydrolyzate and presented YP/S of 0.49. P. stipitis was found to be susceptible to the non-detoxified medium, but it was able to convert 99% of reducing sugars present in the detoxified medium. The macaw palm coconut cake showed considerable potential for bioethanol production. From the lab bench data it is possible to estimate a production of 104 l of ethanol per ton of macaw palm coconut cake.

Submitted by Alexandre Soares (alexandredesoares@yahoo.com.br) on 2016-08-25T13:07:12Z No. of bitstreams: 1 erinaldo_barbosa_silva.pdf: 1554769 bytes, checksum: 6b88b2266a00b9da2124a190999ead5c (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2016-09-08T18:15:46Z (GMT) No. of bitstreams: 1 erinaldo_barbosa_silva.pdf: 1554769 bytes, checksum: 6b88b2266a00b9da2124a190999ead5c (MD5) / Made available in DSpace on 2016-09-08T18:15:46Z (GMT). No. of bitstreams: 1 erinaldo_barbosa_silva.pdf: 1554769 bytes, checksum: 6b88b2266a00b9da2124a190999ead5c (MD5) Previous issue date: 2015 / Na regi?o do Alto Vale do Jequitinhonha s?o poucos os estudos voltados para a cadeia produtiva da agricultura familiar. O objetivo geral da pesquisa foi o de descrever a cadeia produtiva da agricultura familiar do munic?pio de Couto Magalh?es de Minas a partir da identifica??o e relatos dos agricultores familiares, suas associa??es e parceiros institucionais. Tendo como objetivos espec?ficos identificar as etapas da cadeia produtiva da agricultura familiar, conhecer a import?ncia das organiza??es de agricultores familiares para o processo de comercializa??o de alimentos e diagnosticar os entraves t?cnicos e gerenciais das organiza??es de agricultores familiares. Para coleta de dados junto aos sujeitos de pesquisa foram utilizados question?rios semiestruturados. Participaram da pesquisa 13 agricultores familiares, quatro representantes das organiza??es de agricultores e quatro representantes das institui??es parceiras. A cadeia produtiva da agricultura familiar de Couto de Magalh?es de Minas segue um caminho simples e curto com seus produtos destinados principalmente ao mercado local. A maioria dos agricultores familiares entrevistados considerou que os assuntos tratados nas reuni?es de suas associa??es eram tanto de interesse da diretoria, quanto seus e que os benef?cios advindos da participa??o nas suas associa??es estavam relacionados: ao acesso aos implementos agr?colas, a obten??o de cr?dito rural e maior inser??o no mercado. Por outro lado, os parceiros institucionais destacaram que a import?ncia das associa??es eram relativas ? participa??o no Conselho Municipal de Desenvolvimento Rural Sustent?vel e pela sua representatividade junto ao poder p?blico. Os principais entraves apontados pelos agricultores familiares na cadeia produtiva foram: a aus?ncia de Assist?ncia e Extens?o Rural regular e constante, a falta do recurso h?drico, a falta de mat?ria-prima, a falta de transporte adequado dos produtos, a aus?ncia de divulga??o dos seus produtos e falta de selo de certifica??o sanit?rio. Evidenciou-se que as associa??es de agricultores familiares eram importantes atores sociais para a cadeia produtiva da agricultura familiar do munic?pio. Contudo, faz-se necess?rio que sejam criados mecanismos para que as associa??es sigam o proposto pelo Plano Nacional de Economia Solid?ria. Como proposta para o fortalecimento da cadeia produtiva do munic?pio, sugere-se a implanta??o de uma central de associa??es que aglutine e articule projetos e programas de interesse comum de todas. / Disserta??o (Mestrado Profissional) ? Programa de P?s-Gradua??o em Sa?de, Sociedade e Ambiente, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2015. / In the High Jequitinhonha Valley county few studies on the family agriculture production chain are found. The overall goal of this study was to describe the productive chain of family farming in the town of Couto Magalh?es de Minas, drawing from the identification and reports of family farmers, their organizations and institutional partners. More specifically, it aimed to identify the stages in the family farming production chain, learn about the importance of family farmers? organizations for the process of food marketing, and diagnose technical and managerial barriers in these organizations. To collect data, semi-structured questionnaires were used. Subjects included 13 family farmers, four representatives of farmers? organizations and four representatives of partner institutions. The productive chain of family farming in Couto de Magalh?es de Minas follows a short and simple path, with its products primarily intended for the local market. Most family farmers interviewed considered that the issues addressed in their associations? meetings were of interest to the management board as well as to themselves, and that the benefits resulting from participation in their associations related to: access to farm implements, rural credit achievement and greater market insertion. On the other hand, the institutional partners highlighted that the relevance of the associations was subject to their participation in the Municipal Council for Sustainable Rural Development and to its representativeness before the government. The main obstacles mentioned by the subjects about the production chain were: lack of regular and constant assistance and Rural Extension, lack of water resources, lack of raw material, lack of adequate transport of the products, lack of marketing of their products and lack of a sanitary certification seal. It became evident that the family farmers? associations were important social actors for the productive chain of family agriculture in the town. However, it is necessary that mechanisms be created so that they follow what has been proposed by the National Solidarity Economy Plan. As a proposal for the strengthening of the town?s productive chain, it is suggested the implementation of an associations headquarters that clusters and articulates projects and programs of common interest to all.

Data de aprova??o retirada da vers?o impressa do trabalho. / Incluir a Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM) como ag?ncia financiadora. / Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2017-12-13T16:15:41Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) alice_lopes_macedo.pdf: 5251789 bytes, checksum: e988c8abc173c91e128980414db14ef9 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-01-03T12:17:24Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) alice_lopes_macedo.pdf: 5251789 bytes, checksum: e988c8abc173c91e128980414db14ef9 (MD5) / Made available in DSpace on 2018-01-03T12:17:24Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) alice_lopes_macedo.pdf: 5251789 bytes, checksum: e988c8abc173c91e128980414db14ef9 (MD5) Previous issue date: 2017 / Universidade Federal dos Vales do Jequitinhonha e Mucuri (UFVJM) / A crescente demanda global por combust?veis l?quidos para transporte, gera??o de eletricidade, atividade industrial e produ??o agropecu?ria tem imposto planejamento de a??es direcionadas ao uso de fontes ambientalmente limpas de energia. Os derivados da biomassa s?o alternativas econ?mica e tecnicamente vi?veis aos de origem f?ssil, n?o renov?vel, ora dominantes na matriz energ?tica global. O biodiesel, l?quido formado por uma mistura de ?steres de ?cidos graxos, ? adequado ? opera??o em motores de combust?o interna de ciclo Diesel, em substitui??o ou em complemento ao petrodiesel, ou em outras m?quinas t?rmicas. O prop?sito central do presente trabalho foi o desenvolvimento de um catalisador s?lido economicamente vi?vel, quimicamente eficiente e ambientalmente limpo para a produ??o de biodiesel via processos de transesterifica??o de triacilglicer?is dos ?leos de maca?ba ou de soja, com metanol. Foi preparado o catalisador heterog?neo baseado em iodeto de pot?ssio impregnado em s?lica amorfa (SiO2; derivada de areia da constru??o civil) e misturada a um componente magn?tico sint?tico (maghemita, ?Fe2O3). As estruturas qu?mica, cristalogr?fica e hiperfina essenciais e as propriedades magn?ticas dos materiais precursores e do catalisador s?lido foram investigadas. O teor de ?steres e a composi??o dos biodieseis produzidos foram determinados por cromatografia de fase gasosa acoplada a espectr?metro de massa. A composi??o qu?mica do catalisador, verificada por espectroscopias de energia dispersiva sob feixe de el?trons e por fluoresc?ncia de raios X (FRX), confirmou a ocorr?ncia de Si, Fe, K, e I. As ?reas espec?ficas BET encontradas para os componentes individuais, SiO2, ?Fe2O3 e do catalisador SiO2/KI/?Fe2O3, foram 352, 102, e 19 m2 g-1, respectivamente. A significativa redu??o da ?rea espec?fica do catalisador aponta que os componentes foram efetivamente impregnados no suporte. A morfologia das part?culas visualizadas por microscopias eletr?nicas de varredura e de transmiss?o revela a textura esponjosa do catalisador SiO2/KI/?Fe2O3, similarmente ao suporte de s?lica; o ?xido de ferro magn?tico aparece como material altamente organizado, cristalino, disperso no suporte. Os dados M?ssbauer e da magnetometria do ?xido de ferro magn?tico puro e no catalisador confirmam ser a maghemita, resultando em uma magnetiza??o de satura??o do catalisador de 4,6 emu g-1. O catalisador SiO2/KI/?Fe2O3, usado na transesterifica??o de triacilglicer?is, na propor??o em massa em rela??o ao ?leo da am?ndoa de maca?ba de 4,5% e raz?o molar ?leo:metanol de 1:35, levou ? produ??o de 94,3 massa% de ?steres, ap?s 8 h de rea??o. Foi experimentalmente observado que a maghemita tem comportamento qu?mico-catal?tico sin?rgico com os demais componentes do catalisador. O SiO2/KI/?Fe2O3 foi reutilizado em seis rea??es consecutivas com ?leo de soja, na mesma propor??o do catalisador e raz?o molar ?leo:metanol de 1:35, com rendimentos de 94,5% e tempo reacional de 110 min, para o primeiro ciclo, e de 61,2% e 150 min, para o ?ltimo ciclo. O catalisador, antes e ap?s cada ciclo de reuso, e as al?quotas das rea??es foram analisados por FRX, que mostrou que n?o h? perda significativa dos componentes do catalisador. Os resultados demonstram uma perspectiva tecnol?gica que permite redu??o substantiva do volume de efluentes poluentes e utiliza??o de diferentes mat?rias-primas oleaginosas de alto potencial para a produ??o de biodiesel. / Tese (Doutorado) ? Programa de P?s-gradua??o em Biocombust?veis, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2017. / The global demand for liquid fuels destined to propel automobile motors and for all other types of transport has been growing significantly over the last decades in response to the needs of the population for mobility. These fuels are also necessary for the generation of electricity to support industrial and agricultural activities. However, the principal concern involved in the generation of mechanical work involves the threat that the effluents from burning fuels, particularly those from fossil origin, impart to the environment. Biomass-derived fuels are energetically, economically and environmentally interesting alternatives to the non-renewable fossil fuels, which still dominate the global energy matrix. Biodiesel, a liquid that is composed of a mixture of esters of fatty acids, is mainly suitable for use in Diesel-cycle internal combustion engines, totally replacing or partially complementing petrodiesel. The main purpose of the present work was the development of an economically viable, environmentally clean and chemically efficient solid catalyst for the production of biodiesel via the transesterification reaction of triacylglycerols from maca?ba or soybean oil with methanol. The proposed heterogeneous catalyst was based on potassium iodide-impregnated particles of amorphous silica (SiO2; derived from construction sand) mixed with a synthetic magnetic iron oxide (maghemite, ?Fe2O3). The essential chemical, crystallographic and hyperfine structures and magnetic properties of the starting materials and of the solid catalyst mixture were assessed by physical laboratory techniques. The ester content and the chemical composition of the biodiesel produced were determined by gas chromatography coupled with mass spectrometry. The chemical composition of the catalyst, as determined by electron energy dispersive and X-ray fluorescence (FRX) spectroscopies, confirmed the occurrence of Si, Fe, K, and I. Specific BET surface areas for the SiO2 and ?Fe2O3 components and for the SiO2/KI/?Fe2O3 catalyst were found to be 352; 102 and 19 m2 g-1, respectively. The significant reduction in the specific area of the catalyst indicates that the solid components were intimately mixed and that KI was indeed impregnated on the support. The morphology of the particles, as visualized from the scanning and transmission electron microscopy images, reveals the spongy texture of the SiO2/KI/?Fe2O3 catalyst, which was quite similar to that of the initial silica support. The atomic framework of the magnetic iron oxide appeared to be a highly organized, crystalline nano-material, relatively well dispersed on the silica support. The M?ssbauer and magnetometric data for the pure magnetic iron oxide and for the catalyst confirm that the component is essentially maghemite. The resulting saturation magnetization of the catalyst mixture was 4.6 emu g-1. From the chemical point of view, this maghemite was found to act synergically with the other components of the catalyst and to significantly improve its catalytic activity. The transesterification reaction of triacylglycerols using the SiO2/KI/?Fe2O3 catalyst at a mass ratio corresponding to 4.5 mass% relative to the maca?ba kernel oil and a methanol:oil molar ratio 30:1 yielded 94.3 mass% of esters after 8 h of reaction. The SiO2/KI/?Fe2O3 catalyst was reused for six consecutive transesterification reactions of triacylglicerols in soybean oil employing the same mass proportion of the catalyst and a methanol:oil molar ratio 35:1. A 94.5% yield of esters was obtained after 110 min of reaction in the first cycle, and a 61.2% yield was obtained in the last reaction cycle after 150 min. The compositions of the catalyst before and after each reaction cycle, along with detection of residual chemical elements in the liquid mixture of esters formed, were duly monitored by FRX. There was no significant leaching of the catalyst components during the reactions. These results open a perspective for (i) a substantial reduction in the volume of polluting effluents and (ii) the use bio-oils from native Brazilian flora (maca?ba) as raw materials for the industrial production of biodiesel.

Made available in DSpace on 2014-12-17T13:53:37Z (GMT). No. of bitstreams: 1 JoaoPCM_DISSERT.pdf: 2393754 bytes, checksum: f95d47c17e14c0db5625ca5a0ae4656d (MD5) Previous issue date: 2014-01-21 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Offshore wind power emits low amounts of gases, is renewable and has better performance than onshore due to its greater stability and higher wind power density, less visual and noise impact, among others. Brazil has a high capacity of generation, but has not yet developed any offshore projects. High costs are a strong impediment. This study is an effort towards pricing offshore resources through Livelized Cost of Energy - LCOE, which represents the minimum return to cover the costs of development, production and maintenance of a wind project. Initially LCOE was calculated for all Brazilian onshore wind farms listed at Bloomberg New Energy Finance R?, accounting for 71 farms. Then hypothetical offshore wind farms were created from the onshore farms, tripling the cost of generation, which is consistent with the literature, and estimating the offshore energy for two locations off the Brazilian coast using satellite data extracted from National Oceanic and Atmospheric Administration. The results demonstrate that offshore resources have the potential to significantly reduce the energy price due to the better performance of the wind at sea / A fonte de energia e?lica offshore emite baixas quantidades de gases causadores do efeito estufa, ? renov?vel e apresenta melhor desempenho do que a fonte onshore em quesitos como maior estabilidade e densidade de pot?ncia dos ventos, menor impacto visual e sonoro, dentre outros. O Brasil possui uma capacidade de gera??o offshore substancialmente elevada, mas ainda n?o desenvolveu nenhum projeto nessa modalidade. Os custos elevados s?o um forte empecilho. Esse estudo ? um esfor?o em dire??o ? explora??o desse campo, precificando a fonte offshore atrav?s do Livelized Cost of Energy LCOE, que representa o retorno m?nimo para cobrir os custos de desenvolvimento, produ??o e manuten??o de um projeto e?lico. O LCOE foi primeiramente calculado para todos os parques e?licos onshore brasileiros listados no Bloomberg New Energy Finance R?, contabilizando 71 parques. Em seguida foram criados parques e?licos offshore hipot?ticos a partir dos parques onshore, triplicando os custos de gera??o, o que est? em conformidade com a literatura especializada, e estimando-se a energia offshore para dois pontos da costa brasileira atrav?s de dados de sat?lite extra?dos do National Oceanic and Atmospheric Administration. Os resultados demonstram que a fonte offshore tem o potencial de reduzir significativamente o pre?o da energia devido ? melhor performance do vento no mar

Made available in DSpace on 2014-12-17T13:56:54Z (GMT). No. of bitstreams: 1 GlauceLAA_TESE_Capa_ate_pag41.pdf: 802913 bytes, checksum: 5a9d6f5aaa583f77ffd556bd2dceaff2 (MD5) Previous issue date: 2013-03-18 / The purpose of this research is to study the portable or reassemblable architectures, which, different from conventional architecture (whose designs are of permanent buildings), corresponds to the designing of spaces with temporary purposes. The focus of the study is the architectural design of spaces that are produced from building systems that can to be moved to different places (process of assembly / disassembly / reassembly) in order to identify the types of spaces generated and the processes used in their design / projecting. The aim is to investigate relationships between the initial project conceived based on a Reassemblable Construction System (RCS) and its application in the architectural design of professionals and students in order to contribute to the understanding of the specificities of this type of design activity. To this end it was developed the exploratory research based on multimedia methods, which includes: documentary analysis, technical visits, interviews, surveys, academic exercise and documentation by images. Although the study is not conclusive, the results indicate significant differences between the point of view of the RCS?s designers and its users (architects and architecture students) since the users demonstrated to have some difficulty to access the features provided for the first group, in particular the students. It is also demonstrated that the use of RCSs seems to change the appreciation / hierarchization of the conditions of project design, since, unlike what happens in traditional architectural design, the designers who use them seem to be more concerned with constructive issues, especially the structural elements (support and covering), instead of functionality, aesthetics and even physical characteristics of the site / O objeto de investiga??o desse estudo ? a arquitetura port?vel ou remont?vel, que, diferente da arquitetura convencional (feita para ser permanente), corresponde ? projeta??o de espa?os com fins tempor?rios. O foco do estudo ? o projeto arquitet?nico de espa?os que sejam produzidos a partir de sistemas construtivos que possam ser levados a v?rios s?tios (processo de montagem/desmontagem/remontagem), de modo a identificar os tipos de espa?os gerados e os processos utilizados em sua concep??o/projeta??o. Busca-se investigar rela??es entre o projeto inicial concebido a partir de um sistema construtivo remont?vel (SCR) e sua aplica??o na projeta??o arquitet?nica por profissionais e estudantes, a fim de contribuir com elementos que auxiliem a compreender as especificidades desse tipo de atividade projetual. Para tanto foi desenvolvida uma pesquisa explorat?ria com base em multim?todos, que abrangeu: an?lise documental, visitas t?cnicas, entrevistas, question?rios, exerc?cio acad?mico e documenta??o por imagens. Embora o estudo realizado n?o seja conclusivo, os resultados obtidos indicam haver diferen?as entre o ponto de vista dos projetistas do SCR e seus usu?rios (projetistas atuantes e em forma??o), pois os ?ltimos demonstram ter alguma dificuldade para acessar os recursos disponibilizados pelo primeiro grupo, em especial os estudantes. Tamb?m se evidencia que o uso de SCRs parece alterar a valoriza??o/hierarquiza??o dos condicionantes projetuais, uma vez que, diferentemente do que acontece em projetos arquitet?nicos tradicionais, os projetistas que os usam aparentam maior preocupa??o com as quest?es construtivas, sobretudo os elementos estruturais (apoios e cobertura), em detrimento de funcionalidade, est?tica e mesmo caracter?sticas f?sicas do local

Made available in DSpace on 2014-12-17T13:56:55Z (GMT). No. of bitstreams: 1 ErickSM_Capa_ate_pag82.pdf: 1298566 bytes, checksum: 565aa850d5d6ef3b43d77c41e8b8f44d (MD5) Previous issue date: 2008-02-21 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The search for a sustainable urban mobility, has recast the public policy of transport and movement for all, in order to contribute to the welfare economic, social and environmental. Within this context, has as its main objective review here in the city of Natal in the state of Rio Grande Norte, the deployment of the new road infrastructure of the transport corridor of Bernardo Vieira Avenue and checking at least with regard to urban areas and environmental chosen here, as will indicators to assess sustainable urban mobility, that the theory has been well constructed, but in practice little way to apply the proposed guidelines for sustainability. To achieve this result, is initially a literature review with the principal investigators of the matter, since the concepts of indicators of sustainable urban mobility. And a second time, participating in to the case study, using the methodology of environmental awareness, through analysis photographs, notes and testimony in the study area ace to reach conclusions / A busca por uma mobilidade urbana sustent?vel, tem reformulado as pol?ticas p?blicas de transporte e de circula??o para todos, de modo a contribuir para o bem estar econ?mico, social e ambiental. Dentro deste contexto, tem se aqui como objetivo principal analisar na cidade de Natal no Estado do Rio Grande Norte, a implanta??o da nova infra-estrutura vi?ria do corredor de transporte da Avenida Bernardo Vieira, e verificar pelo menos no que tange aos aspectos urban?sticos e ambientais aqui escolhido, como indicadores para avaliar ? mobilidade urbana sustent?vel, que a teoria tem sido bem constru?da, mas que no caminho para pr?tica pouco se aplica das diretrizes propostas de sustentabilidade. Para se chegar a esse resultado, se faz num primeiro momento uma revis?o bibliogr?fica junto aos principais pesquisadores do assunto, desde dos conceitos aos indicadores de mobilidade urbana sustent?vel. E num segundo momento, parti se para o estudo de caso, utilizando a metodologia da percep??o ambiental, atrav?s de an?lises fotogr?ficas, anota??es e depoimentos na ?rea de estudo para chegar ?s conclus?es

Made available in DSpace on 2014-12-17T14:20:13Z (GMT). No. of bitstreams: 1 FranciscoACN_DISSERT.pdf: 1419925 bytes, checksum: 44ba7cfdfa24bace1185e31a6fee821e (MD5) Previous issue date: 2013-05-16 / A great discussion of this work refers to development that is related to the common census of economic growth, in addition, another component of this discussion is related to socio-cultural and environmental impacts of this conception of progress. Giving economic progress is not necessary, since the development in its fullness, that progress depends, but what is sought is a harmony between capital accumulation and environmental limits and social interactions between men and between them and nature. The presence or absence of this harmonious relationship can be observed in various industrial activities, more punctual can cite the example of the developed ceramic activity in the meso-Valley-Acu in Rio Grande do Norte where such activity has great economic representativeness for the region, but that does not have good relations with social and environmental issues and is more focused on the accumulation of capital by increasing its level of industrial activity. Given this debate, the present paper aims to present the profile of a ceramic tile Valley-of-Acu and impacts, ecosocioambientais generated as a result of this activity as well. Methodologically the research will be conducted through literature research papers in books and other work carried out on the same theme, the second time will be held the empirical part of the research through interviews with managers of industries (selected through sample with the criteria set later ) as well as with employees working on the factory floor and city managers in the region under analysis and other agencies responsible for regulation and control of activity potter in the state / A grande discuss?o deste trabalho se refere ao desenvolvimento que est? relacionado com o senso comum de crescimento econ?mico; al?m disso, outro componente da discuss?o est? relacionado com os impactos ambientais e socioculturais dessa concep??o de progresso. Abrir m?o do progresso econ?mico n?o se faz necess?rio, uma vez que o desenvolvimento, em sua plenitude, depende desse progresso, mas o que se busca ? uma harmonia entre o ac?mulo de capital e os limites ambientais e sociais das intera??es entre os homens e entre estes e a natureza. A presen?a ou aus?ncia dessa rela??o de harmonia pode ser observada em v?rias atividades industriais. De forma mais pontual, podemos citar o exemplo da atividade ceramista desenvolvida na mesorregi?o do Vale-do-A?u no estado do Rio Grande do Norte onde tal atividade possui grande representatividade econ?mica para a regi?o, mas que n?o possui boas rela??es com as quest?es socioambientais, estando mais focada no ac?mulo de capital pelo aumento do seu n?vel de atividade industrial. Diante desse debate, o presente trabalho objetiva apresentar o perfil das ind?strias ceramistas do Vale-do-A?u e os impactos ecosocioambientais gerados em decorr?ncia dessa atividade. Metodologicamente, a pesquisa foi realizada mediante estudo bibliogr?fico em livros, em documentos e em outros trabalhos realizados com a mesma tem?tica. No segundo momento, foi realizada a parte da pesquisa emp?rica, tendo como instrumental entrevistas com os gestores das ind?strias (selecionadas por meio de amostra com crit?rios a definir posteriormente), bem como com os colaboradores atuantes no ch?o de f?brica e os gestores municipais da regi?o em an?lise e demais ?rg?os respons?veis por regula??o e controle da atividade ceramista no estado