Made available in DSpace on 2014-12-17T14:27:09Z (GMT). No. of bitstreams: 1 FabianoCPB.pdf: 490707 bytes, checksum: 4840bbb74bb32c52c235b2916b419a2b (MD5) Previous issue date: 2008-06-18 / Since the second half of the 20th century, mankind concerns about life quality and environment preservation began to grow. In Brazil, the edition of the Law n? 6.938/81, that instituted the National Policy of the Environment (Pol?tica Nacional do Meio Ambiente PNMA), contributing significantly to the singular treatment towards the environment by the Federal Constitution of 1988 (Constitui??o Federal de 1988), can be appointed as a landmark of this awareness. The Law n? 6.938/81, following the line observed on the legislation of some Brazilian States, predicted on its 9th article the instruments of PNMA, among which the environmental licensing can be highlighted. This instrument presents itself as indispensable to the construction, installation, extension and operation of enterprises and activities that utilize environmental resources, seen as effective and potentially polluter industries, or even to those that can cause environment degradation. On a parallel way and as a consequence of this awareness, the concept of development begins to acquire a new shape. The development of a country or a region begins to consider not only economical factors, but also environmental, political, cultural and social aspects. Ecodevelopment, or sustainable development, then, arises. In this way, through research on legislation and on theme related doctrine, this work has the intention of analyzing environmental licensing as a PNMA instrument responsible for uniting economical development and the right to an ecologically balanced environment, that is, by the consecution of a truly sustainable development / A partir da segunda metade do s?culo XX, come?ou a aumentar a preocupa??o do ser humano com a qualidade de vida e preserva??o ambiental. No Brasil, pode-se apontar como marco dessa conscientiza??o a edi??o da Lei n.? 6.938/81, que instituiu a Pol?tica Nacional do Meio Ambiente PNMA, contribuindo significativamente para o tratamento singular dado ao meio ambiente pela Constitui??o Federal de 1988. A Lei n? 6.938/81, seguindo a linha observada nas legisla??es de alguns Estados brasileiros, previu, em seu art. 9?, os instrumentos da PNMA, dentre os quais se destaca o licenciamento ambiental. Este instrumento apresenta-se indispens?vel para a constru??o, instala??o, amplia??o e funcionamento de empreendimentos e atividades utilizadoras de recursos ambientais, tidas como ind?strias efetiva e potencialmente poluidoras, ou ainda daquelas que possam causar degrada??o ambiental. Paralelamente e como conseq??ncia dessa conscientiza??o, o conceito do desenvolvimento passa a ganhar novos contornos. O desenvolvimento de um pa?s ou regi?o passa a levar em conta, al?m de fatores econ?micos, aspectos sociais, culturais, pol?ticos e ambientais. Surge, ent?o, o ecodesenvolvimento, ou desenvolvimento sustent?vel. Assim, atrav?s da pesquisa na legisla??o e na doutrina atinente ao tema, o presente trabalho tem por intuito analisar o licenciamento ambiental como instrumento da PNMA respons?vel por aliar o desenvolvimento econ?mico com o direito a um meio ambiente ecologicamente equilibrado, isto ?, pela consecu??o de um desenvolvimento verdadeiramente sustent?vel

Made available in DSpace on 2014-12-17T14:27:13Z (GMT). No. of bitstreams: 1 CarlosFN_DISSERT.pdf: 1117429 bytes, checksum: fd5c9f1fb5bd475f5333136bbafa92c1 (MD5) Previous issue date: 2010-10-29 / This dissertation aims to address the limits and possibilities of realizing the fundamental right to reasonable time of the Brazilian legal system process. From this perspective, we analyze a reasonable time concept for the process, consistent with the civil homeland process; the relationship between efficiency, effectiveness, legal security and reasonable time of adjudication; a formal recognition of the fundamental right to reasonable time of the procedure in the Constitution of 1988; and the immediate applicability of this fundamental right. As indicated, the crisis of the Judiciary and procedural delay are problems directly related to the limits and possibilities of realization of the fundamental right under study. Moreover, we also present some mechanisms that can be used to overcome these problems. The subject was developed based on constitutional interpretation of fundamental rights, an approach that will always have this concern to be based on a methodology which includes the normative and empirical-dogmatic fields, realizing the fundamental right to reasonable time of the process. We adopted as methodological approach the study of this issue in judicial aspect, more specifically in the field of civil procedure. Finally, we weave through a critical and analytical view, our conclusions, which demonstrate the possibilities of overcoming the limits imposed to immediate implementation of the fundamental right to reasonable time of the process in our legal system / A presente disserta??o tem por objetivo abordar os limites e possibilidades de concretiza??o do direito fundamental ao tempo razo?vel do processo no ordenamento jur?dico brasileiro. Nessa perspectiva, analisamos uma concep??o de tempo razo?vel do processo adequada ao processo civil p?trio; a rela??o entre efic?cia, efetividade, seguran?a jur?dica e o tempo razo?vel da presta??o jurisdicional; a positiva??o formal do direito fundamental ao tempo razo?vel do processo na Constitui??o Federal de 1988; e a aplicabilidade imediata desse direito fundamental. S?o indicadas a crise do Judici?rio e a demora processual como problemas relacionados diretamente aos limites e possibilidades de concretiza??o do direito fundamental em estudo. Apresentamos, ainda, alguns mecanismos que podem ser utilizados na supera??o desses problemas. O tema foi desenvolvido com base no vi?s constitucional de interpreta??o de direitos fundamentais, abordagem que ter? sempre presente a preocupa??o de pautar-se numa metodologia que contemple os campos normativo, emp?rico-dogm?tico e de concretiza??o do direito fundamental ao tempo razo?vel do processo. Adotamos como corte metodol?gico o estudo dessa problem?tica no ?mbito judicial, mais especificamente, no campo do processo civil. Por fim, tecemos, numa vis?o anal?tica e cr?tica, nossas conclus?es, as quais demonstram as possibilidades de supera??o aos limites impostos ? concretiza??o imediata do direito fundamental ao tempo razo?vel do processo em nosso ordenamento jur?dico

Made available in DSpace on 2014-12-17T14:27:19Z (GMT). No. of bitstreams: 1 SamuelMG_DISSERT-2.pdf: 3254266 bytes, checksum: 58ff75c9cfaa7d01c629ef806f9feb5e (MD5) Previous issue date: 2012-09-12 / The gas retail represents the end of a section of the oil and natural gas derivative chain, for it is at this stage where the commercialization of those merchandises takes place towards the costumers. This process involves an enormous amount of economic agents, which reflects on an activity of great influence on the citizen's everyday. By the time of the gas retail price liberalization, in 2002, there were great expectations towards that measure, for the insertion of that segment in a competitive market was likely to create a decrease in prices. As there was not a drastic drop off in cost, the question was no longer the price itself, but, predominantly, the conduct taken by the economic agents that operate the market. Not in vain, the segment introduces a greater number of different procedures combined with the organs that compose the Brazilian System of Competition Protection. What is understood, however, is that many of these complaints are made in a lightly way, without a proper analysis of the market and its practices, that being why, in this paper, evidences the causes of these complaints and explained what, in fact, occurs in this market. Also, the organs that protect the free initiative in the sector use different methods to assess anticompetitive practices, which are counterproductive on the combat of anticompetitive practice, that being why the present paper analyzes the used methods on a critic perspective, choosing one which is believed to be the most adequate. The present work also tries to present the gas retail prices on a constitutional, free competition, free initiative and consumers defense perspective, analyzing the competition s aspects on the gas market; the shaping of the gas prices; the market boundaries; the anti-competitive practices under the gas market; and analyze the possibility, according to the defined economic standards in the constitutional text of existing a greater control or gas price indexing and/or regulation which limits the distributors and resellers profit on gas. Still, in consequence of this analysis, a study on Natal s market behavior will be developed in its competitive feature. That being said, moreover being a theoretical-descriptive study, data and statistics gathered is used, which will lead, willing to grasp an experiential study on a few aspects of the Potiguar gas retail market / A revenda de combust?veis representa o fim da cadeia de parte dos derivados de petr?leo e do g?s natural veicular, uma vez que nessa etapa ocorre a comercializa??o dessas mercadorias junto aos consumidores. Esse processo envolve uma gama enorme de agentes econ?micos e reflete uma atividade de forte influ?ncia no cotidiano dos cidad?os. Quando ocorreu a liberaliza??o dos pre?os na revenda de combust?veis, em 2002, houve uma grande expectativa em torno dessa medida, pois se esperava que com a inser??o desse segmento em uma conduta concorrencial houvesse uma intensa diminui??o de pre?os. Como n?o houve uma diminui??o dr?stica dos pre?os, se come?ou a questionar n?o os pre?os dos combust?veis e sua forma??o, mas, predominantemente, a conduta dos agentes econ?micos que atuam nesse mercado. N?o a toa, este segmento ? o que apresenta maior n?mero de procedimento diferentes junto aos ?rg?os que comp?em o Sistema Brasileiro de Prote??o a Concorrencia. O que se percebe, no entanto, ? que muitas dessas den?ncias s?o feitas de forma leviana, sem uma an?lise adequada deste mercado e de suas pr?ticas, sendo por isso, neste trabalho, evidenciada as causas dessas den?ncias e explicitado o que realmente ocorre nesse mercado. Ainda, os ?rg?os que tutelam a livre concorr?ncia no setor utilizam metodologias diversas para aferi??o das pr?ticas anticompetitivas, o que ? contraprodutivo no combate das pr?ticas anticompetitivas, por isso o presente trabalho analisa as metodologias utilizadas de forma cr?tica, escolhendo a que crer mais adequada. Ainda, o presente trabalho busca apresentar a revenda de combust?veis, sob a perspectiva constitucional e dos princ?pios da livre concorrencia, livre iniciativa e defesa do consumidor, analisando os aspectos concorrenciais do mercado de combust?vel; a forma??o do pre?o dos combust?veis; a delimita??o do mercado relevante; as pr?ticas anticoncorrenciais dentro do mercado de combust?vel e, a analisar a possibilidade, de acordo com as normas insculpidas nas diretrizes econ?micas de nosso texto Constitucional, de haver um controle maior ou tabelamento dos pre?os de combust?vel e/ou norma que limite o lucro das revendedoras e distribuidoras de combust?vel. Ainda, em onsequ?ncia dessas analises, se desenvolver? um estudo do comportamento do mercado de Natal-RN em seu aspecto concorrencial. Desta forma, al?m de um estudo te?rico-descritivo, se utilizar? dados e estat?sticas coletadas, que ser?o trabalhadas, com o fito de realizar um estudo emp?rico de alguns aspectos do mercado potiguar de revenda de combust?veis.

Made available in DSpace on 2014-12-17T14:27:21Z (GMT). No. of bitstreams: 1 VitorFRA_DISSERT.pdf: 1123328 bytes, checksum: da8ce762873989a22fb2650ea289ccc6 (MD5) Previous issue date: 2012-03-29 / This paper aims to demonstrate the connection between the application of revenues from oil royalties, exhaustible, even if the long term, and the importance of attempting to the constitutional goal of ensuring the sustainable development, including proposals of regulation. It aims to clarify the constitutional goal of ensure that national development, pointing out its relationship with the right to an ecologically balanced environment, also constitutional provision, demonstrating its important role as a mandatory vector to the Brazilian government. Search the legal nature of the oil royalties and analyzes the regulatory framework of oil royalties, which included extensive legislation, sparse and controversial, a fact that hinders the work of hermeneutist. Pays attention to some international experiences about the application of oil royalties, aiming to establish parameters of other models that can be followed. Exposes the oil royalties as a revenue differentiated, because of its exhaustible character, so that, imperatively, should be used in productive investments, according to intergenerational equity and sustainable development. Proposes a special regulation for revenues from oil royalties with clear criteria for the use of resources, restrictions for its application, as well as controls and sanctions / O presente trabalho tem por objetivo geral demonstrar o liame existente entre a aplica??o das receitas dos royalties de petr?leo, nitidamente exaur?veis, mesmo que a longo prazo, e a import?ncia de se ater ao objetivo constitucional de garantia do desenvolvimento sustent?vel, apresentando propostas regulat?rias para o setor. Tem por prop?sitos espec?ficos explicitar o objetivo constitucional que visa garantir o desenvolvimento nacional, pontuando seu entrela?amento com o direito ao meio ambiente ecologicamente equilibrado, tamb?m de previs?o constitucional, demonstrando seu importante papel cogente como vetor do Estado Brasileiro. Busca ainda, pontuar a natureza jur?dica dos royalties de petr?leo e analisar o marco regulat?rio, o qual consta com vasta legisla??o esparsa e controvertida, fato que dificulta o trabalho do hermeneuta. Atenta ainda a algumas experi?ncias internacionais de regramentos acerca da aplica??o dos royalties de petr?leo, objetivando demonstrar par?metros de outros modelos que possam ser seguidos. Cuida ainda de expor os royalties de petr?leo como uma receita p?blica de natureza diferenciada, visto que nitidamente exaur?vel, de modo que, imperiosamente, deve ser utilizada em investimentos produtivos, obedecendo a equidade intergeracional e o desenvolvimento sustent?vel. Defende um regime regulat?rio especial para as receitas dos royalties de petr?leo com crit?rios claros de utiliza??o dos recursos, condicionamentos precisos para sua aplica??o, bem como controles e san??es direcionados

Made available in DSpace on 2014-12-17T14:35:50Z (GMT). No. of bitstreams: 1 LarissaKOMT.pdf: 1371897 bytes, checksum: 99dc7d93ffe08b68a3c07bbdf795ec6d (MD5) Previous issue date: 2005-06-30 / The thesis presents the body poetry and its inscribing in the myth and But? dance. The argumentation highlights the sensitive dimension present in these itineraries, as a possibility to operate the emergency of knowing inscribed in the body, bringing a kind of rationality that links the fragments, that allows the knowing to break through the barriers of disciplinary isolation, that abandons the certainties and goes through the ways of creation and that gives the body new space and time, featuring epistemological elements, ethical and esthetical, that can permit a sensitive education. All along the way, we comprehend by sensitive education, a education that considers the relinking of logical, analogical, symbolic and artistic knowledge and therefore reconsiders the own act of knowing as a continuous and inconcluded process. That sensitive education is also understood as retaking the body experience, its sensitive nature, as well as being meaningful to reading the world. It includes the body memory, its history and creativity, opening it to innovation, change, sense amplification and dialogue with other bodies and world, because it is within them. It is about an investigation of phenomenologic nature, that dialogues philosophy and art, pointing breakdowns of this reflection foe the body and education studies. We find it necessary to notice the body language, that allows one to think through movements, articulate a thought that is risen from articulations, guts and all the body. This incarnated reason starts the expressive body action, that makes us move to mean, communicate, inaugurate senses. Among these senses, we present a possibility of approach of the elements of But? dance teaching and physical education, as ways of sensitive education showings of body poetry / A tese apresenta a po?tica do corpo e sua inscri??o no mito e na dan?a but?. A argumenta??o ressalta a dimens?o sens?vel presente nesses itiner?rios, como possibilidade de operar a emerg?ncia dos saberes inscritos no corpo, instaurando um tipo de racionalidade que une os fragmentos, permite que os saberes atravessem as fronteiras do isolamento disciplinar, abandona as certezas e envereda pelos caminhos inusitados da cria??o, ressignificando o espa?o e o tempo do corpo, configurando elementos epistemol?gicos, ?ticos e est?ticos que possam favorecer uma educa??o sens?vel. Em todo o percurso, compreendemos por educa??o sens?vel uma educa??o que considera a religa??o dos conhecimentos l?gicos, anal?gicos, simb?licos, art?sticos, que considera a inscri??o corporal do conhecimento e como tal redimensiona o pr?prio ato de conhecer como um processo cont?nuo e inconcluso. Essa educa??o sens?vel ? tamb?m entendida como aquela que retoma a experi?ncia do corpo, sua natureza sens?vel, como significativa para a leitura do mundo. Inclui a mem?ria do corpo, a sua hist?ria, a sua criatividade, abrindo-se ? inova??o, ? mudan?a, ? amplifica??o dos sentidos e ao di?logo com os outros corpos e com o mundo, porque neles tamb?m se constitui. Trata-se de uma investiga??o de natureza fenomenol?gica, que dialoga filosofia e arte, apontando desdobramentos dessa reflex?o para os estudos do corpo e da educa??o. Consideramos necess?rio perceber a linguagem dos gestos, a qual possibilita pensar por movimentos, permite articular um pensamento que nasce das articula??es, das v?sceras, de todo o corpo. Essa raz?o encarnada aciona a a??o expressiva do corpo, que faz com que nos movamos para significar, para comunicar, para inaugurar sentidos. Dentre esses sentidos, apresentamos uma possibilidade de abordagem dos elementos da dan?a but? para o ensino da Dan?a e da Educa??o F?sica, como modos de educa??o sens?vel elucidativos da po?tica do corpo

Made available in DSpace on 2014-12-17T15:55:06Z (GMT). No. of bitstreams: 1 RayanaGM_DISSERT.pdf: 1137569 bytes, checksum: ce466fbe89b1404b41839183f803b269 (MD5) Previous issue date: 2014-02-24 / Quilombo communities remaining are groups marked by insufficient public assistance and characterized by living in rural and conducting economic activities such as agriculture. The development on a sustainable basis is important to ensure strategies for economic growth and environmental preservation. This work aims to study the remaining Quilombo Capoeira Black community, located in the municipality of Maca?ba, Rio Grande do Norte, considering the principles of sustainable development. Attempt to respond to what level such community can be considered sustainable from an analysis of their social practices. The methodological procedures used consisted of a literature review and documentary, questionnaires, conducting semi-structured interviews and direct observation. The final results show that the family farm has characteristics that approximate the principles of sustainable development, including the diversification of labor, food production with less environmental damage and strengthening the rural environment, and indicate that the main economic activities practiced in Capoeira dos Negros community are agriculture, manufacturing of cassava flour and brick manufacturing, which, in turn, are linked to negative environmental impacts, such as sedimentation pond, groundwater contamination, air pollution and soil erosion. What lead to the conclusion that the social practices of the community are not in line with the dimensions of sustainable development. It is hoped that the survey results provide subsidies for development and implementation of public policies / As comunidades remanescentes quilombolas s?o grupos marcados pela insuficiente assist?ncia p?blica e caracterizados pela viv?ncia no meio rural e realiza??o de atividades econ?micas como a agricultura. O desenvolvimento em bases sustent?veis ? importante para garantir estrat?gias de crescimento econ?mico e preserva??o ambiental. Este trabalho pretende estudar a comunidade remanescente quilombola Capoeira do Negros, localizada no munic?pio de Maca?ba, Rio Grande do Norte, considerando os princ?pios do desenvolvimento sustent?vel. Procurar? responder em que n?vel a referida comunidade pode ser considerada sustent?vel a partir da an?lise de suas pr?ticas sociais. Os procedimentos metodol?gicos utilizados consistiram em revis?o bibliogr?fica e documental, aplica??o de formul?rios, realiza??o de entrevistas semiestruturadas e observa??o direta. Os resultados finais mostram que a agricultura familiar possui caracter?sticas que a aproximam dos princ?pios do desenvolvimento sustent?vel, entre elas, a diversifica??o do trabalho, a produ??o de alimentos com menores danos ambientais e o fortalecimento do meio rural; e indicam que as principais atividades econ?micas praticadas na comunidade Capoeira dos Negros s?o a agricultura, a fabrica??o de farinha de mandioca e a fabrica??o de tijolos, que, por sua vez, est?o ligadas a impactos ambientais negativos, como assoreamento de corpos d ?gua, contamina??o do len?ol fre?tico, polui??o atmosf?rica e eros?o do solo. O que levam a conclus?o de que as pr?ticas sociais da comunidade n?o est?o em conson?ncia com as dimens?es do desenvolvimento sustent?vel. Espera-se que os resultados da pesquisa forne?am subs?dios a elabora??o e implementa??o de pol?ticas p?blicas

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-02-05T22:10:33Z No. of bitstreams: 1 MichelSantanaDeDeus_DISSERT.pdf: 4922399 bytes, checksum: fc28d4e3f5194f84ffba8f230bf99cae (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-02-15T23:30:17Z (GMT) No. of bitstreams: 1 MichelSantanaDeDeus_DISSERT.pdf: 4922399 bytes, checksum: fc28d4e3f5194f84ffba8f230bf99cae (MD5) / Made available in DSpace on 2016-02-15T23:30:17Z (GMT). No. of bitstreams: 1 MichelSantanaDeDeus_DISSERT.pdf: 4922399 bytes, checksum: fc28d4e3f5194f84ffba8f230bf99cae (MD5) Previous issue date: 2015-01-30 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / Este trabalho trata da pesquisa e desenvolvimento de um amplificador integrador com ganho program?vel por largura de pulso. S?o propostas duas arquiteturas de amplificadores program?veis por pulsos, sendo uma baseada em componentes discretos e outra baseada em capacitores chaveados. A partir de requisitos de opera??o definidos para o estudo, s?o definidos par?metros e realizadas simula??es para a valida??o das arquiteturas. Posteriormente, o software e o circuito s?o desenvolvidos e testados. ? realizada a avalia??o dos circuitos referentes ?s duas arquiteturas propostas, e a partir disso, ? selecionada uma arquitetura para que seja aperfei?oada e permita o desenvolvimento de um circuito integrado em um trabalho futuro. / This work deals with the research and development of a Pulse Width Programmable Gain Integrating Amplifier. Two Pulse Width Programmable Gain Amplifier architectures are proposed, one based on discrete components and another based on switched capacitors. From the operating requirements defined for the study, parameters are defined and simulations are carried out to validate the architecture. Subsequently, the circuit and the software are developed and tested. It is performed the evaluation of the circuits regarding the two proposed architectures, and from that, an architecture is selected to be improved, aiming the development of an integrated circuit in a future work.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-03-31T22:25:53Z No. of bitstreams: 1 CarolineGomesMoura_DISSERT.pdf: 2102873 bytes, checksum: c954d6aaea1a58ccd102a726f8bae793 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-04-01T23:05:31Z (GMT) No. of bitstreams: 1 CarolineGomesMoura_DISSERT.pdf: 2102873 bytes, checksum: c954d6aaea1a58ccd102a726f8bae793 (MD5) / Made available in DSpace on 2016-04-01T23:05:31Z (GMT). No. of bitstreams: 1 CarolineGomesMoura_DISSERT.pdf: 2102873 bytes, checksum: c954d6aaea1a58ccd102a726f8bae793 (MD5) Previous issue date: 2015-06-25 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / O PSFC (Pr0.5Sr0.5Fe1-xCuxO3-?) ? um novo ?xido misto com estrutura perovskita que vem sendo estudado para aplica??o como catodo de c?lulas a combust?vel de ?xido s?lido de temperatura intermedi?ria (600-750 ?C), principalmente devido a sua elevada condutividade i?nica e eletr?nica abaixo de 800 ?C. Neste trabalho, p?s de PSFC com duas composi??es diferentes (Pr0,5Sr0,5Fe0,8Cu0,2O3-PSFC5582 e Pr0,5Sr0,5Fe0,6Cu0,4O3-PSFC5564) foram sintetizados pelo m?todo dos citratos utilizando uma nova rota. Os p?s obtidos foram caracterizados por an?lise t?rmica (Termogravimetria e Calorimetria Diferencial Explorat?ria), e os materiais calcinados a 800, 900 e 1000 ?C por 5h foram analisados por difratometria de raios X (DRX), com refinamento Rietveld dos dados de difra??o e dilatometria. Filmes de composi??o PSFC5582 foram obtidos por serigrafia do p? calcinado a 1000 ?C. Os filmes foram depositados em substrato de c?ria dopada com gadol?nia (CGO) e sinterizados a 1050 ?C por 2h. O desempenho eletroqu?mico dos eletrodos foi avaliado por espectroscopia de imped?ncia e a interface eletrodo/eletr?lito foi observada por microscopia eletr?nica de varredura (MEV). A resist?ncia espec?fica por ?rea (ASR) foi 0,44 ?.cm? a 800 ?C, um valor pouco inferior aos reportados na literatura para catodos contendo cobalto. Os coeficientes de expans?o t?rmica (CET) do PSFC de ambas as composi??es variaram entre 13 e 15 x 10-6 ?C-1 , numa faixa de temperatura de 200 a 650 ?C, demonstrando a boa compatibilidade t?rmica destes catodos com eletr?litos de Ce0,9Gd0,1O1,95 (CET = 12 x 10-6 ?C). / The PSFC (Pr0.5Sr0.5Fe1-xCuxO3-?) is a new mixed oxide perovskite and has been studied and evaluated the cathode materials for intermediate temperature solid oxide fuel cells (IT-SOFCs), mainly due to its good compatibility with the electrolyte (CGO) and its high ionic conductivity and electronic in intermediate temperature. In this work, PSFC powders with two different compositions (Pr0,5Sr0,5Fe0,8Cu0,2O3- PSFC5582 and Pr0,5Sr0,5Fe0,6Cu0,4O3-PSFC5564) were synthesized by the citrate method using a new route. The powders obtained were characterized by thermal analysis (Differential Scanning Calorimetry and Thermogravimetry), and the material calcined at 800, 900 and 1000 ?C for 5h were analyzed by X-ray diffractometry (XRD), with the Rietveld refinement of the diffraction data and dilatometry. PSFC5582 composite films were obtained by screen printing of powder calcined at 1000 ?C. The films were deposited on substrate ceria doped with gadolinia (CGO) and then sintered at 1050 ?C for 2h. The electrochemical performance of the electrodes was evaluated by impedance spectroscopy and the interface electrode/electrolyte was observed by scanning electron microscopy (SEM). The specific resistance area (ASR) was 0.44 ?.cm? at 800 ?C, slightly lower than those reported in the literature for cathodes containing cobalt. The thermal expansion coefficients of both the PSFC compositions were obtained and varied between 13 and 15 x 10-6 ?C-1 , in a temperature range of 200 to 650 ?C, demonstrating the good thermal compatibility of cathodes with Ce0,9Gd0,1O1,95 electrolytes (CET = 12 x 10-6 ?C).

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-04-15T23:04:38Z No. of bitstreams: 1 MarianaRodriguesAmaralDaCosta_DISSERT.pdf: 2488995 bytes, checksum: c1bb8bd3c6d969c70744bfd049bfdd73 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-04-20T21:52:13Z (GMT) No. of bitstreams: 1 MarianaRodriguesAmaralDaCosta_DISSERT.pdf: 2488995 bytes, checksum: c1bb8bd3c6d969c70744bfd049bfdd73 (MD5) / Made available in DSpace on 2016-04-20T21:52:13Z (GMT). No. of bitstreams: 1 MarianaRodriguesAmaralDaCosta_DISSERT.pdf: 2488995 bytes, checksum: c1bb8bd3c6d969c70744bfd049bfdd73 (MD5) Previous issue date: 2014-03-20 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A eutrofiza??o artificial ? uma das grandes amea?as ? qualidade ambiental de ecossistemas aqu?ticos em todo o mundo. As expectativas dos cen?rios clim?ticos futuros para regi?es ?ridas e semi?ridas s?o per?odos de secas mais intensas e frequentes, aumentando ainda mais o risco de eutrofiza??o e de flora??es de cianobact?rias. Muitas t?cnicas de restaura??o de lagos eutrofizados foram propostas para reduzir as cargas de nutrientes e melhorar a qualidade da ?gua. Uma t?cnica bastante utilizada ? a biomanipula??o por remo??o de peixes que v?m se mostrando eficiente em lagos eutr?ficos de regi?es temperadas. Trabalha mos a hip?tese de que a remo??o de peixes bent?v oros bioturbadores reduz a biomassa total do fitopl?ncton e altera a composi??o dos grupos funcionais fitoplanct?nicos , refletindo na melhora d a qualidade da ?gua . Assim , este estudo teve como objetivo avaliar o impacto da biomanipula??o na din?mica e estr utura d os grupos funcionais fitoplanct?nicos e n a qualidade da ?gua. Aplicamos a t?cnica da biomanipula??o no lago artificial ESEC, regi?o semi?rida do nordeste brasileiro e analisamos as vari?veis f?sicas e qu?micas da ?gua e a din?mica dos grupos funcion ais fitoplanct?nicos, mensalmente durante o per?odo de novembro de 2012 a agosto de 2013. Com a remo??o dos peixes bioturbadores, observamos um aumento significativo na zona euf?tica, na riqueza de esp?cies fitoplanct?nicas e o recrutamento de grupos funci onais fitoplanct?nicos de algas verdes (grupos F e J) indicadoras de boa qualidade ambiental. Por?m, n?o observamos diferen?as significativas na concentra??o de f?sforo total e na biomassa e diversidade fitoplanct?nica. O efeito da seca severa na regi?o du rante o estudo foi evidente , proporcionando uma redu??o dr?stica no n?vel de ?gua que influenciou na disponibilidade de recursos e afetou a comunidade fitoplanct?nica antes da biomanipula??o . Para avaliar o efeito de uma seca severa sobre a din?mica dos gr upos funcionais fitoplanct?nicos e testar se per?odos de seca s?o favor?veis ? domin?ncia de cianobact?rias, estudamos dois lagos artificiais vizinhos (ESEC e Pocinhos) no semi?rido tropical durante maio de 2012 a fevereiro de 2013. Observamos uma diferenc ia??o temporal das vari?veis abi?ticas e do fitopl?ncton causada pela seca severa. Ambos os lagos apresentaram redu??o de 2 metros do n?vel da ?gua e aumento nos valores de condutividade, turbidez, nas concentra??es de nutrientes e redu??o da transpar?ncia da ?gua, durante o per?odo da seca severa. Por?m, a comunidade fitoplanct?nica respondeu diferente ?s condi??es ambientais dependendo da profundidade de cada lago. O mais profundo (Pocinhos) aumentou a biomassa total do fitopl?ncton e apresentou domin?nci a do grupo funcional de cianobact?rias heterocitadas formadoras de flora??o (grupo S N ) e o lago menos profundo (ESEC) reduziu a biomassa total e apresentou domin?ncia de grupos funcionais de algas flageladas com metabolismo mixotr?fico (grupos W 1 e W 2 ) . Su marizando, o conhecimento sobre os efeitos da biomanipula??o por remo??o de peixes bent?voros bioturbadores em um lago raso no semi?rido tropical ainda ? incipiente e o estudo possui limita??es devido ao evento de seca prolongada durante o per?odo de estud o . Sendo assim, ? necess?rio um monitoramento em longo prazo para investigar os reais efeitos da biomanipula??o no funcionamento do ecossistema. Al?m disso, per?odos de seca podem ter efeitos antag?nicos (aumento ou redu??o) na biomassa total , bem como na composi??o dos grupos funcionais fitoplanct?nicos, que nem sempre levar? ? domin?ncia de cianobact?rias. / The artifi cial eutrophication is one of the biggest t h reat for the quality of aquatic ecosystems in the whole world. The expectations for the future climatic scenarios in arid and semi - arid regions are intense and frequent droughts enhancing the risk of eutrophicati on and cyanobacterial blooms. Restoration techniques of eutrophic lakes were proposed to reduce nutrient loading and improve the water quality. A successful technique used in temperate regions is the biomanipulation by benthivorous fish removal . Our hypoth esis is that the benthivorous fish removal reduces phytoplankton total biomass and change the composition of phytoplankton functional groups, improving water quality. The aim of the study was evaluate the impact of biomanipulation on phytoplankton function al groups and in the water quality. We applied the technique of biomanipulation in the artificial lake ESEC, in a semi - arid region of Brazil and analyzed the physical and chemical variables and the dynamic of phytoplankton functional groups monthly during November 2012 to August 2013. With the removal of benthivorous fish we observed a significant increase of the euphotic depth, phytoplankton richness and the recruitment of green algae (groups F and J ), indicators of good water quality. However, we did not observe significant differences on total phosphorous concentration and on phytoplankton biomass and diversity. The drought effect in the region during the study was evident , promoting a drastic reduction on water level which influenced the availability of resource and affected phytoplankton community before the biomanipulation. To evaluate the effect of severe drought on the dynamic of phytoplankton functional groups and test if the drought periods are favorable to dominance of cyanobacterial groups, we stu died two artificial neighbors lakes (ESEC and Pocinhos) in a semi - arid tropical region during May 2012 to February 2013. We observed a temporal differentiation of biotic and abiotic variables caused by drought. Both lakes presented reduction of 2 meters of water level and increase on conductivity, turbidity, nutrients concentration and a reduction on water transparency, during the severe drought. The deeper lake (Pocinhos) increased phytoplankton total biomass and presented cyanobacterial functional group d ominance (group S N ) and the shallower lake (ESEC) reduced phytoplankton total biomass and presented dominance of mixotrophic and flagellate functional groups (groups W 1 e W 2 ). Summarizing, the knowledge of the effects of benthivorous fish removal in semi - a rid tropical lakes still unknown and this study had limitations caused by the impact of drought. Thus, it is necessary a long term monitoring to investigate the real effects of biomanipulation on the functioning of the studied ecosystems. Otherwise, period s of drought could have opposite effects (increase or reduction) on total biomass and composition of phytoplankton functional groups. Drought not always leads to dominance of cyanobacterial groups.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-05-10T22:28:10Z No. of bitstreams: 1 DacifranCavalcantiCarvalho_DISSERT.pdf: 1351801 bytes, checksum: 32d4ef33234a3425bc728003e4d53e8e (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-05-17T00:41:54Z (GMT) No. of bitstreams: 1 DacifranCavalcantiCarvalho_DISSERT.pdf: 1351801 bytes, checksum: 32d4ef33234a3425bc728003e4d53e8e (MD5) / Made available in DSpace on 2016-05-17T00:41:54Z (GMT). No. of bitstreams: 1 DacifranCavalcantiCarvalho_DISSERT.pdf: 1351801 bytes, checksum: 32d4ef33234a3425bc728003e4d53e8e (MD5) Previous issue date: 2015-05-18 / Intensas mudan?as socioecon?micas, ocorridas no final da d?cada de 1970, decorrentes do processo de internacionaliza??o da economia, impulsionaram a produ??o e o consumo de equipamentos eletr?nicos em todo o mundo. Como resultado, houve um incremento na demanda por recursos naturais para sua fabrica??o, e uma maior quantidade e diversidade de res?duos sendo gerados e depositados de forma inadequada sobre o planeta Terra, acarretando a degrada??o do meio ambiente. Esse contexto imp?e um novo desafio ?s Institui??es Educacionais de Ensino Superior (IFES): gerir e gerenciar de modo ambientalmente sustent?vel os seus Res?duos de Equipamentos Eletr?nicos (REEs). Nessa perspectiva este trabalho aborda o tema em dois cap?tulos. O primeiro traz, por meio de pesquisa explorat?ria bibliogr?fica qualitativa com base em livros, artigos, disserta??es e legisla??o a an?lise comparativa da intera??o entre a Agenda Ambiental na Administra??o P?blica e a Pol?tica Nacional de Res?duos S?lidos, e suas Contribui??es para Pr?ticas Sustent?veis na Administra??o P?blica. O estudo fornece, assim, evid?ncias da intera??o e contribui??o de ambos os marcos para a pr?tica de a??es sustent?veis na gest?o e no gerenciamento dos res?duos s?lidos, contemplando a dimens?o social, econ?mica e ambiental, demonstrando que o longo caminho a se percorrer em prol da sustentabilidade do desenvolvimento n?o desqualifica as contribui??es desses instrumentos ?s institui??es que a eles aderirem. No cap?tulo seguinte este trabalho aborda a Gest?o e o Gerenciamento de Res?duos de Equipamentos Eletr?nicos no ?mbito do Campus Central da Universidade Federal do Rio Grande do Norte (UFRN) a fim de analisar o atual sistema de gest?o e gerenciamento dos REEs gerados. Para a observa??o pretendida, a investiga??o fez uso de estudo de caso e de pesquisa explorat?ria qualitativa e quantitativa. Trata de um contexto local cuja dimens?o tem abrang?ncia global, uma vez que a degrada??o ambiental decorrente do consumo exacerbado de equipamentos eletr?nicos e da destina??o inadequada dos REEs representa um fen?meno que afeta significativamente, de modo negativo, a qualidade do ecossistema, a seguran?a e a sa?de dos habitantes da Terra. Os resultados da pesquisa indicam que as condi??es de armazenamento dos REEs, bem como o processo de coleta nas unidades amostrais s?o inadequados; e, ainda, h? car?ncia de um centro de triagem e recupera??o de REEs, de pessoal capacitado e de ferramentas adequadas para a efic?cia desse processo; e detectam defici?ncia na pol?tica de incentivo aos processos de redu??o, reutiliza??o e reciclagem preconizada pela A3P e PNRS. Dessa forma, sugere medidas j? aplicadas em caso semelhante em outra Institui??o P?blica a fim de mitigar os problemas decorrentes da gest?o e do gerenciamento inadequados dos REEs. / The intense socioeconomic changes that occurred in the late 1970s, arising from the process of internationalization of the economy, boosted the production and consumption of electronic equipments all over the world. As a result, there was an increase in demand for natural resources for their manufacturing, and a greater quantity and variety of wastes were being generated and deposited inappropriately on Earth, leading to the degradation of the environment. This context imposes a new challenge to the Educational Institutions of Higher Education (EIHE)1: manage and administrate in an environmentally sustainable manner their Electronic Equipment Waste (EEW)2. This study approaches the theme through the perspective of an analysis of the interaction between the Environmental Agenda in Public Administration and the Solid Waste National Policy and their contributions to sustainable practices, having as reference the Central Campus of the Federal University of Rio Grande do Norte (UFRN), considering their management and administration system of the EEW generated there. The study provides the evidences of the interaction and contribution of both those milestones for the practice of sustainable actions in management and administration of solid wastes, including the social, economical and environmental dimension, demonstrating that the long way to go in support of the sustainable development does not disqualify the contributions of these instruments to the institutions that start to use them. Methodologically, the investigation was guided by a bibliographical, documentary and field research. To the intended observation, we have done the research using case study and qualitative and quantitative exploratory research. It is a local context which has a global dimension, because the environmental degradation resulting from excessive consumption of electronic equipments and inadequate disposal of the EEW represents a phenomenon that affects significantly and negatively the quality of the ecosystem, the safety and the health of the inhabitants of the Earth. The research results indicate that the storage conditions of the EEW, as well as the process of collecting the sample units is inadequate; there is no requirement of showing the Certification of Environmental Sustainable Final Disposal of the EEW by the participants in the battling bidding, both in the public notice, by the Permanent Commission of Bidding, as in the time of gathering the EEW, by the Department of Material and Patrimony; and that there is the lack of a center for sorting and recovery of such waste, competent staff and adequate tools for the effectiveness of this process. These results also detect lacks in the politics, advocated by A3P and PNRS, to encourage the processes of reduction, reuse and recycling. So, it suggests measures that have already been applied in a similar case at another Public Institution in order to mitigate the problems arising from the inadequate management and administration of the EEW.