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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Avaliacao do impacto radiologico provocado por materiais de construcao em moradores de casas populares

CAMPOS, MARCIA P. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:37:47Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T13:56:11Z (GMT). No. of bitstreams: 1 05443.pdf: 1296896 bytes, checksum: 57802bf1d2d111c3bfe5cbeead28558a (MD5) / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
22

Análise dos impactos sócio-ambientais decorrentes da mineração na Chapada do Araripe – Nova Olinda/Ceará / Analysis of the socio environmental impacts due to mining in Araripe - Nova Olinda/Ceará

Bezerra, Lireida Maria Albuquerque January 2013 (has links)
BEZERRA, Lireida Maria Albuquerque. Análise dos impactos sócio-ambientais decorrentes da mineração na Chapada do Araripe – Nova Olinda/Ceará. 2013. 139 f. Dissertação (Mestrado em geografia)- Universidade Federal do Ceará, Fortaleza-CE, 2013. / Submitted by Elineudson Ribeiro (elineudsonr@gmail.com) on 2016-10-14T12:36:01Z No. of bitstreams: 1 2013_dis_lmabezerra.pdf: 4927300 bytes, checksum: 0c8ac8d94ef161f1cce44d8b6b159a67 (MD5) / Approved for entry into archive by Jairo Viana (jairo@ufc.br) on 2016-10-18T18:55:53Z (GMT) No. of bitstreams: 1 2013_dis_lmabezerra.pdf: 4927300 bytes, checksum: 0c8ac8d94ef161f1cce44d8b6b159a67 (MD5) / Made available in DSpace on 2016-10-18T18:55:53Z (GMT). No. of bitstreams: 1 2013_dis_lmabezerra.pdf: 4927300 bytes, checksum: 0c8ac8d94ef161f1cce44d8b6b159a67 (MD5) Previous issue date: 2013 / The research aims to analyze the process of socio environmental degradation in Chapada do Araripe , in the city Nova Olinda/Ceará, resulting from the extraction and exploitation of limestone, offering theoretical elements that contribute to the emergence of alternatives that contribute to mitigate the damage caused by the mining activity in the capitalist mold. The methodology was based on a qualitative analysis, based on the understanding of the subjective characteristics and on the information related to the communities living around the mining activity, and also on the specific literature on the study subject. The analysis of the environmental impacts arisingfrom the mining in Nova Olinda is of paramount importance for thecomprehension of the intensity of the environmental impacts and how theycompromise the Chapada do Araripe and its surroundings, as well as the historical and paleontological records of the sedimentary basin of Araripe. It is noticed that the intensity of theenvironmental impacts result from thenon-sustainable exploitation, compromising the environment and its surroundings, with the waste tailings, changes in vegetation and extraction that degrades and impacts the local landscape. / A pesquisa objetiva analisar o processo de degradação sócio ambiental na Chapada do Araripe, no município de Nova Olinda/Ceará, decorrente da extração e exploração do calcário, oferecendo elementos teóricos, que contribuam para o surgimento de alternativas que contribuam para mitigar os estragos provocados pela atividade da mineração nos moldes capitalistas. A metodologia partiu de uma análise qualitativa, com base no entendimento das características subjetivas e das informações relacionadas às comunidades que vivem no entorno da atividade mineradora e, também o embasamento de literatura específica na área do objeto de estudo. A análise dos impactos ambientais decorrentes da mineração em Nova Olinda é de suma importância para a compreensão da intensidade dos impactos ambientais e como estes comprometem a Chapada do Araripe e seu entorno, bem como, os registros históricos e paleontológicos da bacia sedimentar do Araripe. Percebe-se, que o grau de intensidade dos impactos ambientais resulta de uma exploração não sustentável comprometendo o meio ambiente e seu entorno, com o desperdício do rejeito, alteração na vegetação e uma extração que degrada e impacta a paisagem local.
23

Gestão ambiental em instituições de ensino superior : o caso da Universidade Federal do Acre

Ferreira, Anajara Rodrigues January 2018 (has links)
A gravidade dos problemas ambientais exige o engajamento de vários setores da sociedade, principalmente, o da educação. As instituições de ensino superior devem atuar como protagonistas no combate aos impactos ambientais gerados pela sociedade. Desta forma, o presente estudo tem por objetivo analisar a presença da gestão ambiental nas estruturas curriculares dos cursos de graduação, nas ações de extensão desenvolvidas, nos projetos de pesquisa e nas atividades operacionais realizadas no campus Rio Branco da Universidade Federal do Acre (UFAC), uma instituição de ensino superior localizada na região Norte do Brasil. Para atingir este objetivo, foram realizadas entrevistas semiestruturadas com dirigentes da IES, análise de documentos oficiais da instituição e observação assistemática nas dependências do campus. Esta análise também permitiu identificar os aspectos e impactos ambientais decorrentes das atividades desenvolvidas nos seguintes setores do campus: restaurante universitário, salas de aula e de atendimento administrativo, banheiros e laboratórios. Analisadas as condições vigentes, foram propostas ações visando a redução dos impactos ambientais identificados. Os dados coletados, analisados por meio da técnica de análise de conteúdo, identificaram que, dos 33 cursos de graduação oferecidos pela UFAC, 75,76% deles apresentam alguma disciplina na sua estrutura curricular que aborda a temática ambiental Por outro lado, foram identificadas poucas ações de extensão e poucos projetos de pesquisa relacionados as questões ambientais do campus. Em 2017, entre as atividades operacionais, havia apenas uma ação institucionalizada de gestão ambiental, que se relacionava a distribuição de garrafas para substituir o uso dos copos descartáveis, ação que desde seu início não teve descontinuidade. A UFAC possui um Plano de Gestão de Logística Sustentável, porém ainda não foi aprovado e não foi iniciada a sua execução. Observou-se que, por falta de conhecimento dos dirigentes e de sensibilização de toda a comunidade universitária, a gestão ambiental na UFAC encontra-se em um estágio inicial, o que demonstra a importância da implantação de uma ferramenta que sistematize as ações de gestão ambiental envolvendo todo o campus, buscando reduzir os impactos ambientais gerados, evitar o desperdício de recursos e tornar esta IES um exemplo para a região Norte. / The seriousness of environmental problems requires the engagement of various sectors of society, especially education. Higher education institutions should act as protagonists in combating the environmental impacts generated by society. Thereby, the present study aims to analyze the presence of environmental management in the curricular structures of undergraduate courses, in the extension actions developed, in the research projects and in the operational activities carried out at the Rio Branco campus of the Federal University of Acre (UFAC), a higher education institution located in the northern region of Brazil. To achieve this objective, semi-structured interviews were conducted with HEI leaders, analysis of official institution documents and non-systematic observation on campus premises. This analysis also allowed to identify environmental aspects and impacts resulting from the activities carried out in the following sectors of the campus: university restaurant, classrooms and administrative service, restrooms and laboratories. Analyzed the current conditions, actions were proposed to reduce the identified environmental impacts. The data collected, analyzed through the content analysis technique, identified that of the 33 undergraduate courses offered by UFAC, 75.76% of them present some discipline in their curricular structure that addresses the environmental theme On the other hand, few extension actions and few research projects related to campus environmental issues were identified. In 2017, among the operational activities, there was only one institutionalized action of environmental management, which is related to the distribution of bottles to replace the use of disposable cups, an action that from the beginning did not have discontinuity. UFAC has a Sustainable Logistics Management Plan, but it has not been approved yet and its execution has not been initiated. It was observed that, due to the lack of knowledge of the leaders and the awareness of the entire university community, environmental management at UFAC is at an early stage, which demonstrates the importance of the implementation of a tool that systematizes environmental management actions involving the entire campus, seeking to reduce the environmental impacts generated, avoid wasting resources and make this HEI an example for the Northern region.
24

Addressment of Uncertainty and Variability in Attributional Environmental Life Cycle Assessment

January 2016 (has links)
abstract: 'Attributional' Life Cycle Assessment (LCA) quantitatively tracks the potential environmental impacts of international value chains, in retrospective, while ensuring that burden shifting is avoided. Despite the growing popularity of LCA as a decision-support tool, there are numerous concerns relating to uncertainty and variability in LCA that affects its reliability and credibility. It is pertinent that some part of future research in LCA be guided towards increasing reliability and credibility for decision-making, while utilizing the LCA framework established by ISO 14040. In this dissertation, I have synthesized the present state of knowledge and application of uncertainty and variability in ‘attributional’ LCA, and contribute to its quantitative assessment. Firstly, the present state of addressment of uncertainty and variability in LCA is consolidated and reviewed. It is evident that sources of uncertainty and variability exist in the following areas: ISO standards, supplementary guides, software tools, life cycle inventory (LCI) databases, all four methodological phases of LCA, and use of LCA information. One source of uncertainty and variability, each, is identified, selected, quantified, and its implications discussed. The use of surrogate LCI data in lieu of missing dataset(s) or data-gaps is a source of uncertainty. Despite the widespread use of surrogate data, there has been no effort to (1) establish any form of guidance for the appropriate selection of surrogate data and, (2) estimate the uncertainty associated with the choice and use of surrogate data. A formal expert elicitation-based methodology to select the most appropriate surrogates and to quantify the associated uncertainty was proposed and implemented. Product-evolution in a non-uniform manner is a source of temporal variability that is presently not considered in LCA modeling. The resulting use of outdated LCA information will lead to misguided decisions affecting the issue at concern and eventually the environment. In order to demonstrate product-evolution within the scope of ISO 14044, and given that variability cannot be reduced, the sources of product-evolution were identified, generalized, analyzed and their implications (individual and coupled) on LCA results are quantified. Finally, recommendations were provided for the advancement of robustness of 'attributional' LCA, with respect to uncertainty and variability. / Dissertation/Thesis / Doctoral Dissertation Sustainability 2016
25

Previsao Tecnologica a medio e longo prazo sobre os processos de geracao de hidrogenio, considerando cenarios futuros probabilisticos que levem em conta o desenvolvimento das pilhas a combustivel / Technological forecasting at medium and long term about hydrogen generation process, considering probabilistics future scenarios and taking into account fuel cells development

NAKANO, MILTON S. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:52:48Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:02:37Z (GMT). No. of bitstreams: 0 / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
26

Determinacao de metais pesados e outros elementos em sedimentos da baia de Sepetiba [RJ] por ativacao neutronica

PELLEGATTI, FABIO 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:25:40Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:02:43Z (GMT). No. of bitstreams: 1 06886.pdf: 4121786 bytes, checksum: 130acdd76c4a5005a2a6dab597557aac (MD5) / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
27

Estudo dos efeitos ecotoxicológicos dos fármacos paracetamol e dipirona sódica para organismos aquáticos / Ecotoxicological study of effects of the pharmaceuticals dipyrone sodium and paracetamol to aquatic organisms

LAMEIRA, VANESSA 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:35:32Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:04:01Z (GMT). No. of bitstreams: 0 / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
28

Estudo da resposta do caramujo Biomphalaria glabrata (Say, 1818) frente a estímulos ambientais estressores, com enfoque na proteína HSP70 / Study of the response from the snail Biomphalaria glabrata (Say, 1818) facing stressor environmental stimuli, with focus on the protein HSP70

CANTINHA, REBECA da S. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:35:32Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:04:01Z (GMT). No. of bitstreams: 0 / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP
29

Avaliacao das consequencias radiologicas de liberacoes rotineiras em sitio com varias intalacoes nucleares

LUCINIO, ELENA A.G. 09 October 2014 (has links)
Made available in DSpace on 2014-10-09T12:47:58Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:07:23Z (GMT). No. of bitstreams: 1 09023.pdf: 5020333 bytes, checksum: fad008e6f2df7382a16c31dafc1045b1 (MD5) / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
30

Impactos ambientais decorrentes de vazamento de gás natural de baixa e média pressões, na área urbana central do município de São Paulo /

Moscardi, Jean Prost. January 2005 (has links)
Orientador: Antonio Roberto Saad / Banca: José Eduardo Zaine / Banca: José Luiz Albuquerque Filho / Resumo: Com o crescente desenvolvimento do mercado de gás o Brasil e, conseqüente, mudança da matriz energética do país, iniciou-se a procura por tecnologias as quais atenderiam as novas demandas. A área de Meio Ambiente, cada vez mais, está sendo direcionada como ponto-chave enquanto condicionante na realização ou não de qualquer evento. O trabalho aborda de maneira sucinta, as interações existentes entre empreendimento, tubulações de gás apresentando baixas e médias pressões; e, a área de atuação e apresentou uma proposição para um possível impacto ambiental. Apresenta linha de pesquisa desenvolvida pela agência reguladora competente (COMPANIA DE TECNOLOGIA DE SANEAMENTO AMBIENTAL, CETESB) que atua neste campo e tangencia os mais diversos aspectos correlacionados (danos diretos, indiretos e outros). Ao todo, o levantamento ocorreu em 40 locais situados no centro da Cidade de São Paulo e foram constatadas alterações nos três segmentos do ambiental: físico-químico, biótico e antrópico. Em suas conclusões, são propostas as possíveis causas dos danos e medidas mitigadoras a este impacto. / Abstract: With the increasing development of the market of gas in Brasil, and so, change of the energy matrix of the country, it was initiated looks it for technologies which would take care of the new demands. The area of Environment, each time more, is being directed as point key in the accomplishment or not of any event. The work approached in easy way, the existing interactions between enterprise and area of performance and presented a proposal for a possible Environment impact. It presents line of research developed for the competent regulating agency (CETESB) that it acts in this field and tangent the most diverse correlated aspects (damages right-handers, indirect and others). At all, the research displayed at 40 places on São Paulo's city down town and it was observe alterations at tree environmental spheres: physic-chimistral , biotic and antropic. It considers in its possible conclusions damages and mitigating measures and this impact. / Mestre

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