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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Neto, Diogo Miguel Félix;

    Cada vez mais, os consumidores exigem empresas com negócios responsáveis e sustentáveis, estando os termos Responsabilidade Social Corporativa, Sustentabilidade e ESG na ordem do dia no mundo empresarial. Assiste-se por parte das empresas à sua incorporação, desenvolvendo estratégias de forma a integrar as preocupações mais atuais aos níveis sociais, ambientais e de governação nas suas atividades e operações. Para além das empresas puderem ajudar a mitigar estas preocupações, os investimentos nestas áreas podem trazer-lhes diversos benefícios. Este estudo pretende analisar qual a perceção dos consumidores sobre estes temas e a importância que têm para os mesmos, aplicando-se a um caso prático sobre a seguradora Fidelidade. Com base num inquérito preparado para este fim, cujas respostas eram anónimas, pretendeu-se medir a perceção atual que os consumidores têm sobre a Fidelidade e estudar as formas de aumentar a sua perceção a futuro. More and more, consumers demand companies with responsible and sustainable businesses, becoming terms such as Corporate Social Responsibility, Sustainability, and ESG a part of day by day of the recent enterprise world. Those are being incorporated by enterprises, which are developing strategies to integrate the most recent concerns at social, environmental and governance levels into their activities and operations. Beyond the fact of companies might be able to mitigate these concerns, investments in these areas can reward them with several benefits. This thesis aims to analyse the perception of consumers on these themes and its importance for them, applying it to a practical case about the insurance company Fidelidade. Based on a survey designed for this purpose, whose answers were anonymous, it was evaluated the current perception that consumers have about Fidelidade, as well as it was studied how to increase their perception in the future.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Repositório Instituc...arrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Repositório Instituc...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Lourenço, Maria Ermelinda; Januário, Maria Isabel; Massa, Vitor;

    Neste trabalho avaliou-se o efeito da data de sementeira nas características de produção e composição em açúcares do sorgo sacarino, em função das quais se estimou o potencial de produção de bioetanol a partir desta cultura. O estudo foi conduzido durante dois anos (2005 e 2006), com a variedade de sorgo sacarino Madhura. A sementeira foi efectuada nas datas de 17 de maio, 31 de maio, 14 de junho e 28 de junho. Na sementeira efectuada a 17 de maio a produção de caules verdes e secos atingiu os valores de 66 e 13,8 t ha-1, respectivamente, as quais foram significativamente superiores às obtidas nas sementeiras de junho. A produção máxima de açúcar naquele mês foi de 4,6 t ha-1, o que corresponde à produção estimada de 2300 L ha-1 de bioetanol. Os resultados alcançados permitem concluir que as datas de sementeira de maio foram as que melhor potenciaram a aptidão do sorgo sacarino como cultura energética, para a produção de bioetanol. Revista de Ciências Agrárias, vol. 36 n.º 3 (2013)

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Revista de Ciências ...arrow_drop_down
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    UTL Repository
    Article . 2013
    Data sources: UTL Repository
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Revista de Ciências ...arrow_drop_down
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      UTL Repository
      Article . 2013
      Data sources: UTL Repository
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Novo, M. E.; Henriques, M. J. A.;

    Climate change is bound to impact the water cycle and water availability, compounding the sustainable management of its quantity and quality. Groundwater is bound to suffer the impacts of climate change, coupled with those of land use changes, population and its lifestyles evolution. Climate change studies normaly have a 50 to 100 years horizon, which is a challenge for decision makers, who usually rely on relatively short therm data and projections to implement their management policies. BINGO Project tries to address this gap, by providing information of climate change impacts, including those of extreme events, on the water cycle for the short-tomedium term. Climate change impacts on groundwater rely on mathematical modeling, using recharge projections obtained from the climate forecasts of the Regional Climate Models set up for Europe. Sea level change is also a component of this analysis and its ensuing impacts of saltwater intrusion on the coastal and estuarine areas of Aluviões do Tejo and Bacia do Tejo-Sado/Margem Esquerda aquifers. 4p DHA/NRE

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Repositorio Científi...arrow_drop_down
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Repositorio Científi...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Gonçalves, Gabriela Ribeiro da Silva;

    Relatório de Estágio do Mestrado em Ensino de Geografia no 3º ciclo do Ensino Básico e no Ensino Secundário apresentado à Faculdade de Letras O presente relatório de estágio visa apresentar uma análise e reflexão das atividades letivas e extralectivas ao longo do Estágio Pedagógico Supervisionado, desenvolvido na Escola Secundária Dr.ª Maria Cândida, em Mira, durante o ano letivo 2020/2021. Além disso, pretendo efetuar uma reflexão da aplicação da estratégia didático-pedagógica, neste caso concreto a Aplicação dos Media na Educação Geográfica e Ambiental, caso específico do Jornal aplicado ao tema das Alterações Climáticas. O relatório está dividido em três partes. A primeira parte, onde é feita a descrição geral da escola, acompanhado do enquadramento geográfico, turma, núcleo de estágio e das atividades realizadas ao longo do estágio. A segunda parte, está direcionada para a reflexão teórica e científica associada ao tema da aplicação didática.O tema da componente científica é as Alterações Climáticas e os seus impactos na saúde humana, assim como o surgimento ou ressurgimento de doenças parasitárias na Europa. Na terceira parte é apresentada a estratégia didática, o jornal realizado pelos alunos, acompanhado dos resultados obtidos ao inquérito realizado aos professores do agrupamento e aos alunos sobre o mesmo. Neste capítulo também se encontra uma reflexão sobre o ensino à distância e os impactos na aprendizagem tanto nos professores como alunos. Os objetivos propostos para esta estratégia foram positivos, uma vez que obtive o feedback desejado por parte dos alunos, assim como toda a dedicação na construção do jornal. This internship report aims to present an analysis and reflection of teaching and extralegal activities throughout the Supervised Pedagogical Internship, developed in Escola Secundária Dr. ª Maria Cândida, in Mira, during the school year 2020/2021. In addition, I intend to reflect on the application of didactic-pedagogical strategy, in this specific case the Application of Media in Geographic and Environmental Education, the specific case of the newspaper applied to the theme of Climate Change.The report is divided in three parts. The first part, where the general description of the school is made, accompanied by the geographic framing, class, internship nucleus and the activities carried out throughout the internship. The second part is directed towards the theoretical and scientific reflection associated with the theme of didactic application. The theme of the scientific component is Climate Change and its impacts on human health, as well as the emergence or resurgence of parasitic diseases in Europe.In the third part, the didactic strategy is presented, the newspaper made by the students, accompanied by the results obtained from the survey carried out to the teachers of the grouping and to the students about it. In this chapter there is also a reflection on distance learning and the impacts on learning for both teachers and students. The objectives proposed for this strategy were positive, since I obtained the desired feedback from the students, as well as all the dedication in the construction of the newspaper.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Estudo Geralarrow_drop_down
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    Estudo Geral
    Master thesis . 2021
    Data sources: Estudo Geral
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Estudo Geralarrow_drop_down
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      Estudo Geral
      Master thesis . 2021
      Data sources: Estudo Geral
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Martins, Sandra; Gonçalves, Alexandre; Silva, Ermelinda; Brito, Cátia; +5 Authors

    With the advances of climate change, it is expected harmful consequences to olive tree (Olea europaea L.). Therefore, it is necessary to develop cost-effective practices to reduce the vulnerability of olive crops to the adverse impacts of environmental stresses. Rainfed olive trees were sprayed with zeolites, natural crystalline aluminosilicates, and its effects on photosynthetic activity, phenolic composition, antioxidant activity, leaf minerais concentrations, plant growth, yield, and olive oil quality were assessed. Zeolites application enhanced photosynthetic activity, as well the concentrations of N, Mg, Cu, Zn and Mn in leaves, and changed the secondary metabolism, with decrease oftotal phenols, ortho-diphenols and total antioxidant activity, signs of lower oxidative stress. As consequence, zeolites boosted plant growth, crop yield, and size and weight of fruits. The foliar spray did not significantly affect the oil quality indices free acidity, peroxide value and Km and K270 coefficients. This study strongly suggests that folial' zeolites might be an effective strategy to mitigate the adverse environmental conditions. This research was funded by the Foundation for Science and Technology (FCT, Portugal) and FEDER under Programme PT2020 for financiai support to ClTAB (UIDB/04033/2020), and the Operational Group "Novas práticas em olivais de sequeiro: estratégias de mitigação e adaptação às alterações climáticas" I funded by PT2020 and EAFRD (European Agricultural Fund for Rural Development). Sandra Martins acknowledges the financiai support provided by the FCT-Portuguese Foundation for Science and Technology (PD/BD/135327/2017), under the Doctoral programme "Agricultural Production Chains-from fork to farm". info:eu-repo/semantics/publishedVersion

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Biblioteca Digital d...arrow_drop_down
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    Biblioteca Digital do IPB
    Conference object . 2021
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Biblioteca Digital d...arrow_drop_down
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      Biblioteca Digital do IPB
      Conference object . 2021
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    Authors: Andrade, José; Abreu, Francisco;

    In Mediterranean-type climates crop yield depends strongly on the early development of individual plants. Extreme variations of soil temperature close to the surface of bare soils and fast changes of soil water content due to irregular rainfall and high evaporative demand reduce the success of germination, emergence and early leaf production, reducing crop productivity. According to IPCC Fourth Assesment report, climate change in Southern Europe “is projected to worsen hygrometric and thermal conditions (high temperature and drought) and to reduce water availability” and, consequently, to decrease general crop productivity. The aim of this study was to evaluate the thermal conditions in the top soil layer under different climate change scenarios, and their effects on the early development of some representative crops of Mediterranean agriculture (pea, broad bean, maize and sunflower). For this purpose, soil temperatures near the surface of a Luvisol and a Vertisol during the usual sowing season of winter (October) and summer crops (April) were compared to those recorded in the air above ground, to forecast future values. The impact of simulations on the speed, size and dispersion of germination, emergence and early leaf production was estimated using values of bioclimatic parameters of the crops (cardinal temperatures and thermal times for different phases of establishment) found in the literature. In both seasons, monthly mean temperatures at soil top layer were significantly greater (*P<0.05) than those found in the air above ground. However, the relationships between air and top soil temperatures were different in both soils and in both seasons. Summer crops seem to be less affected by an increase in temperature than winter crops. Otherwise, the former seem to be more affected by a decrease in soil water availability than the later. In addition, final emergence, speed of emergence and leaf production of the different species will be more affected by global warming than the dispersion around the most likely thermal times. The magnitude of these effects depends also on the magnitude of warming.

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    Authors: Fróes Lima, Carlos Alberto, 1963-;

    Resumo: Este trabalho parte da premissa que as tecnologias para smart grid se apresentam como oportunidade para criar um novo negócio de energia. Todos os stake-holders devem ser envolvidos, e organizados para construir ou modernizar a rede de energia em seus aspectos de qualidade, disponibilidade, infraestrutura, padronização, interoperabilidade, confiabilidade e sustentabilidade. Deve-se também buscar a consciência de uso/demanda, de renda e de entendimento dos clientes de forma adequada. Pondera-se que as estratégias governamentais, no âmbito da legislação e da regulamentação, devem ser objetivas para garantir o novo negócio e proteger o interesse público. Os consumidores (como clientes) devem ser ouvidos, tornando-se partícipes ativos no mercado de energia. Com o desenvolvimento de um relacionamento dinâmico a indústria de energia necessitará de novas condições e requisitos operacionais que devem ser criados para garantir a transformação dentro e fora do ambiente de negócios regional. Foram estudadas novas tecnologias, novas possibilidades de serviços e preços. Incentivos, bem como a evolução das normas regulatórias apareceram como fundamentais para manter e expandir o fornecimento da energia e gerenciar a demanda, com implicações na melhora do relacionamento e nos investimentos/receitas para o capital investido, que necessitam resultar na ampliação da percepção de valor da energia pelos clientes. Uma avaliação para o caso brasileiro é feita considerando-se a experiência internacional até a data e através de exemplo de aplicação em consumidores residenciais como um estudo de caso. Demonstra-se o impacto para e do consumidor doméstico nos processos de uso da energia, bem como a evolução necessária de sistemas, estratégias para que se alcance o desejado momento histórico do desenvolvimento, da reorganização do mercado de energia e da legislação/regulamentação. Em suma, a evolução do negócio de energia no Brasil é um fato que, para sua eficácia, deve ser estrategicamente planejado nos diversos âmbitos de aplicação de tecnologias e modelagem do negócio, receber incentivos e ser regulado. Questões relacionadas aos investimentos a serem realizados e o retorno destes investimentos devem ser respondidas caso a caso, segundo a realidade regional das concessões, segundo as previsões de compartilhamento de custos com os consumidores e também totalmente relacionadas com a regulamentação adotada. A possiblidade da oferta de serviços e produtos para atendimento e ampliação do espaço de atuação das concessionárias brasileiras é uma transformação necessária para seu reconhecimento como provedoras de soluções energéticas. Abstract: The smart grid technologies present themselves as opportunities to create new energy business. All stake holders must be involved, organizing, building and upgrading the power grid in its aspects of quality, availability, infrastructure, standards, reliability, interconnectivity, and sustainability. It is necessary the awareness target of supply-demand, incomes and strongly understand their clients. The Governmental strategies must be clear, with regulatory and legislative initiatives to foster new business and protect the public interest. Consumers (as clients) must be heard, as they become active players in the energy market. As they develop a dynamic relationship with the operating power industry new conditions and requirements need to be created in order to lead the strategic transformation inside and outside regional businesses. Deals on new energy sources, new technologies, new possibilities of differentials service and prices were studied. Incentives as well as the evolution of regulation rules seem a fundamental role to maintain and to expand the power supply and demand-side management, with implications for a better relationship between client-consumers, dealers and incomes/revenues on invested capital. It is also important to relate and to rethink the affordability of the tariffs and energy delivery costs to clients. An evaluation to the Brazilian market was done, considering the up to date international experiences and running an application, specially built to demonstrate the domestic consumption, as a case study. This implemented case is presented in order to demonstrate the domestic consumer impact to the energy use as well as the required evolution of systems and strategies to move on to this historical moment of development and reorganization of the energy market as well as the legislation/regulation. To sum up, evolving energy business in Brazil does not appear in this analysis merely as a possibility but as fact to be accomplished. It should be strategically planned considering the scope of a number of different technology applications, business models and be promoted by the policies agencies. Questions related to investments and their profits should be answered according to the regional energy business, as well as the consumer's participation and obviously new legislation and market regulation. Services and products to be offered by the Brazilian energy dealers should evolve correspondingly in order to improve business and recognition as energy solution providers Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica Doutor em Planejamento de Sistemas Energéticos Orientador: Gilberto De Martino Jannuzzi Planejamento de Sistemas Energéticos Doutorado

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    Authors: Serrano, Diego Machado Carrion;

    Abstract: Pellets is a solid biofuel that has been fairly used in developed countries of temperate climate. In recent years its consumption has increased for residential heating and electricity and thermal generation in co-firing plants, particularly in Europe, that is worldwide the largest pellets' market. Brazil has good potential to be a supplier in the emerging pellets market due to its forest tradition, adequate weather, land availability and a well-organized forestry segment. Based on the availability of biomass, it can be considered that there are two regions in Brazil that are promising for pellets production from wood waste: the North and South regions, but with a strong advantage of the second due to the supply chain of forest products based on commercial plantations; the production in the North region would suffer severe constraints due to the difficulty in tracking the sources of biomass. The assessment regarding the potential of pellets production for exporting is based on a hypothetical venture aiming at producing woodpellets in Paraná, considering real market conditions and logistics. The results indicate that a pellets plant with capacity to produce 100,000 t of pellets/year, biomass price turning around US$ 19.00/m3, and pellets price at European harbors (CIF value) as ¿ 140 per tonne, would be feasible, with an IRR of 17% or a NPV of US$ 1.7 million at a discount rate of 13%. The two main important factors in the final cost are the shipping cost from Brazil to Europe and the price of the raw material (i.e., its opportunity cost). As expected, the economic feasibility depends on the cost of raw material, as well as on the price paid for the product in European harbors. Resumo: O pellets é um bioenergético de uso relativamente difundido em países desenvolvidos de clima temperado, tendo sido nos últimos anos empregado de forma crescente como fonte de energia em aquecimento residencial e na geração de energia elétrica e térmica, em unidades "co-firing", principalmente na Europa, que é o maior mercado consumidor do produto. Nesse contexto, o Brasil, por possuir vocação florestal devido ao clima, disponibilidade de terras e ter segmento florestal bem estruturado, apresenta potencial para se inserir como supridor nesse mercado. Na elaboração desta dissertação, considerada a disponibilidade de biomassa, duas regiões foram identificadas como as mais promissoras para a produção de pellets a partir dos resíduos de madeira: as regiões Norte e Sul, sendo que a segunda tem significativa vantagem por possuir uma cadeia de produtos florestais fundamentada na silvicultura (florestas plantadas), enquanto na primeira haveria severas restrições devido à dificuldade de rastreamento da origem da biomassa. Foi feita a análise econômica de um empreendimento hipotético voltado à produção de pellets de madeira situado na região Sul do país, sob condições reais de mercado e logística. Os resultados indicam que, para uma planta pelletizadora com capacidade de 100.000 toneladas de pellets/ano, preço da biomassa em torno dos R$ 35,00/m3 e com preços de pellets a granel em porto na Europa (CIF) fixado em 140 ¿/tonelada, o empreendimento é viável, com TIR de 17% e VPL de R$ 3.6 milhões para taxa de desconto de 13%. O custo do frete marítimo é determinante na estrutura de custos, seguido do preço da matéria prima. Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica Mestre em Planejamento de Sistemas Energéticos Orientador: Arnaldo Cesar da Silva Walter Mestrado

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    Authors: Rossi, Raquel Andrade de;

    Resumo: O bagaço da cana-de-açúcar é considerado uma biomassa lignocelulósica promissora para a produção de etanol, devido a sua composição em açúcares, grande disponibilidade e baixo custo. A levedura Saccharomyces cerevisiae, embora apresente atributos ideais para o uso industrial, não é capaz de fermentar alguns açúcares presentes nesta biomassa, como xilose e arabinose (açúcares não convencionais). Assim, é interessante a busca por leveduras em nichos ecológicos onde esses açúcares estão presentes. O Brasil apresenta uma rica biodiversidade, qualificada pela diversidade em: ecossistemas, espécies biológicas e endemismos. Utilizar ecossistemas característicos do território brasileiro como fonte de coleta oferece a oportunidade não só de obter novas espécies, mas também de isolar aquelas capazes de fermentar diferentes substratos. De acordo com o exposto, o objetivo deste trabalho foi de isolar, a partir de amostras de biomas brasileiros, leveduras que apresentassem a habilidade em fermentar alguns açúcares, além da glicose e frutose, especialmente os que compõem o hidrolisado do bagaço da cana-de-açúcar (açúcares não convencionais). Os resultados demonstraram que as linhagens isoladas não apresentaram habilidade em fermentar as principais pentoses (xilose e arabinose) presentes no bagaço da cana-de- açúcar. Contudo, 19 foram capazes de assimilar a xilose, e 12 linhagens, a arabinose. Desta forma, como sugestão, o hidrolisado do bagaço da cana-de-açúcar pode ser utilizado para a produção de biomassa protéica (single cell protein) pelas linhagens que assimilaram xilose e arabinose Abstract: Sugarcane bagasse is considered a promising lignocellulosic biomass for ethanol production, due to its sugar composition, high availability and low price. Although, Saccharomyces cerevisiae has the ideal attributes for industrial use, it is not able to ferment some sugars present in this biomass such as xylose and arabinose (non-convencional sugars). Thus, it is interesting to search for yeasts in ecological niches where these sugars are present. Brazil has a rich biodiversity, qualified for its diversity in: ecosystems, biological species and endemisms. To use the ecosystems characteristics of the Brazilian territory as a source for sample collection offers the opportunity not only to obtain new species, but also to isolate those capable of fermenting diverse substrates. Therefore, the aim of this study was to isolate from samples of Brazilian biomes, yeasts that have the ability to ferment some sugars, besides glucose and fructose, especially those components of the sugarcane bagasse hydrolizate (non-convencional sugars). The results demonstrated that the isolated strains had no ability to ferment the main pentoses (xylose and arabinose) present in sugarcane bagasse. However, 19 strains were able to assimilate xylose, and 12 strains, arabinose. Thus, as suggestion, the sugarcane bagasse hydrolyzate can be used for the production of single cell protein by the strains that assimilate xylose and arabinose Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos Orientador: Lucia Regina Durrant Mestre em Ciência de Alimentos Mestrado

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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Cervone, Camila Ortolan Fernandes de Oliveira;

    Resumo: A sustentabilidade dos biocombustíveis é uma questão polêmica, que ganhou grande dimensão desde a segunda metade da década passada. Nesse contexto, biodiversidade é um dos aspectos mais mencionados no debate internacional. Em função das pressões de diferentes segmentos sociais, critérios de sustentabilidade foram definidos e têm condicionado a aplicação de políticas de fomento aos biocombustíveis. Na prática, esquemas de certificação têm sido usados de forma crescente e nada indica que essa tendência seja alterada. Assim, a futura produção de etanol de cana de açúcar no Brasil, e a competitividade da produção nacional em mercados internacionais, estarão condicionadas a que sustentabilidade seja uma realidade, e possa ser comprovada. No Brasil, muito pouco se sabe sobre os impactos da produção de cana, e de etanol, sobre a biodiversidade, e foi isso que motivou esta dissertação. Seu objetivo geral é o entendimento da questão biocombustíveis-biodiversidade, incluindo a identificação do conhecimento existente, das diferentes visões, das aspirações, etc. A análise foi feita com foco na produção de etanol de cana, nas condições brasileiras, e de suas perspectivas. Um dos objetivos específicos foi definido na avaliação dos esquemas de certificação, e como neles a biodiversidade tem sido tratada. Uma das conclusões desta dissertação é que, não só no Brasil, ainda pouco se sabe sobre os impactos dos biocombustíveis sobre a biodiversidade. Segundo, biodiversidade é um tema complexo, que tem várias dimensões, e em um esquema de certificação não se pode ter as mesmas ambições de avaliação e monitoramento de trabalhos científicos. Mais ainda, esquemas de certificação são instrumentos de mercado, e precisam ser definidos tendo-se em mente aspectos condicionantes como a praticidade, os custos, e as responsabilidades que podem ser atribuídas ao agente econômico que é avaliado. Entretanto, em geral os esquemas de certificação de biocombustíveis são mais rigorosos do que os esquemas que tratam de produtos florestais e alimentícios, e estão alinhados com os indicadores recomendados para empresas de energia. De qualquer forma, mecanismos de certificação têm um importante papel a cumprir no fomento às iniciativas, na disseminação de informações e na diferenciação de produtores e produtos. As normas devem ser entendidas como complementares à regulação pública e, dessa forma, podem ser muito úteis. Finalmente, conclui-se que as leis e a regulação do uso da terra no Brasil (e.g., o Código Florestal, o Zoneamento Agroecológico e a definição de Áreas Prioritárias de Conservação) podem ser, desde que adequadamente aplicadas, suficientes para que os potenciais impactos sobre a biodiversidade sejam evitados ou minimizados. Com a legislação existente, e com a pressão do mercado e dos segmentos sociais, a produção de etanol de cana no Brasil tem amplas condições de ser cada vez mais sustentável, de uma forma geral, e menos impactante sobre a biodiversidade, em particular Abstract: The sustainability of biofuels is a controversial issue, which gained large dimension since the second half of last decade. In this context, biodiversity is one of the most mentioned aspects in the international debate. Because of pressure from different social segments, sustainability criteria have been defined and have conditioned the application of policies to promote biofuels. In practice, certification schemes have been increasingly used and there is no indication that this trend will change. Thus, future production of ethanol from sugarcane in Brazil, and the competitiveness of national production in international markets, will depend on the fact that sustainability is a reality, and may be proved. In Brazil, very little is known about the impacts of sugarcane and ethanol production on biodiversity, and that was what motivated this dissertation. Its overall goal is to understand the issue biofuels-biodiversity, including the identification of existing knowledge, the different visions, aspirations, etc. The analysis was focused on the production of ethanol from sugarcane in Brazilian conditions, and perspectives. One of the specific objectives was defined in the assessment of certification schemes, and how biodiversity has been addressed. One of the conclusions of this dissertation is that very little is known about the impacts of biofuels on biodiversity, worldwide. Second, biodiversity is a complex issue that has many dimensions, and through a certification scheme is not possible to assess and monitor biodiversity as in scientific research. Furthermore, certification schemes are market instruments, and must be defined taking into account aspects as practicality, costs, and responsibilities that can be assigned to the economic agent that is certified. However, in general certification schemes of biofuels are stricter than certification schemes of forest and food products, and are aligned with the indicators recommended for energy companies. Anyway, certification mechanisms have an important role to play in fostering initiatives, in disseminating information and on differentiating producers and products. But the standards should be understood as complementary to public regulation, and thus they can be very useful. Finally, a conclusion of this dissertation is that the laws and regulations already available in Brazil regarding land use (e.g., the Forest Code, the Agro-ecologic Zoning and the definition of Priority Areas for Conservation) can be sufficient for avoiding or minimizing the potential impacts over biodiversity but, obviously, depending on their enforcement. With the existing legal and regulatory environment, combined with pressures from the market and from social actors, the sustainability of ethanol production from sugarcane in Brazil can be improved. This can result in even more sustainable production in general, and less impacts over biodiversity, in particular Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica Mestra em Planejamento de Sistemas Energéticos Orientadores: Arnado Walter, Pita A. Verweij Planejamento de Sistemas Energéticos Mestrado

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    Authors: Neto, Diogo Miguel Félix;

    Cada vez mais, os consumidores exigem empresas com negócios responsáveis e sustentáveis, estando os termos Responsabilidade Social Corporativa, Sustentabilidade e ESG na ordem do dia no mundo empresarial. Assiste-se por parte das empresas à sua incorporação, desenvolvendo estratégias de forma a integrar as preocupações mais atuais aos níveis sociais, ambientais e de governação nas suas atividades e operações. Para além das empresas puderem ajudar a mitigar estas preocupações, os investimentos nestas áreas podem trazer-lhes diversos benefícios. Este estudo pretende analisar qual a perceção dos consumidores sobre estes temas e a importância que têm para os mesmos, aplicando-se a um caso prático sobre a seguradora Fidelidade. Com base num inquérito preparado para este fim, cujas respostas eram anónimas, pretendeu-se medir a perceção atual que os consumidores têm sobre a Fidelidade e estudar as formas de aumentar a sua perceção a futuro. More and more, consumers demand companies with responsible and sustainable businesses, becoming terms such as Corporate Social Responsibility, Sustainability, and ESG a part of day by day of the recent enterprise world. Those are being incorporated by enterprises, which are developing strategies to integrate the most recent concerns at social, environmental and governance levels into their activities and operations. Beyond the fact of companies might be able to mitigate these concerns, investments in these areas can reward them with several benefits. This thesis aims to analyse the perception of consumers on these themes and its importance for them, applying it to a practical case about the insurance company Fidelidade. Based on a survey designed for this purpose, whose answers were anonymous, it was evaluated the current perception that consumers have about Fidelidade, as well as it was studied how to increase their perception in the future.

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    Authors: Lourenço, Maria Ermelinda; Januário, Maria Isabel; Massa, Vitor;

    Neste trabalho avaliou-se o efeito da data de sementeira nas características de produção e composição em açúcares do sorgo sacarino, em função das quais se estimou o potencial de produção de bioetanol a partir desta cultura. O estudo foi conduzido durante dois anos (2005 e 2006), com a variedade de sorgo sacarino Madhura. A sementeira foi efectuada nas datas de 17 de maio, 31 de maio, 14 de junho e 28 de junho. Na sementeira efectuada a 17 de maio a produção de caules verdes e secos atingiu os valores de 66 e 13,8 t ha-1, respectivamente, as quais foram significativamente superiores às obtidas nas sementeiras de junho. A produção máxima de açúcar naquele mês foi de 4,6 t ha-1, o que corresponde à produção estimada de 2300 L ha-1 de bioetanol. Os resultados alcançados permitem concluir que as datas de sementeira de maio foram as que melhor potenciaram a aptidão do sorgo sacarino como cultura energética, para a produção de bioetanol. Revista de Ciências Agrárias, vol. 36 n.º 3 (2013)

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    Article . 2013
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    Authors: Novo, M. E.; Henriques, M. J. A.;

    Climate change is bound to impact the water cycle and water availability, compounding the sustainable management of its quantity and quality. Groundwater is bound to suffer the impacts of climate change, coupled with those of land use changes, population and its lifestyles evolution. Climate change studies normaly have a 50 to 100 years horizon, which is a challenge for decision makers, who usually rely on relatively short therm data and projections to implement their management policies. BINGO Project tries to address this gap, by providing information of climate change impacts, including those of extreme events, on the water cycle for the short-tomedium term. Climate change impacts on groundwater rely on mathematical modeling, using recharge projections obtained from the climate forecasts of the Regional Climate Models set up for Europe. Sea level change is also a component of this analysis and its ensuing impacts of saltwater intrusion on the coastal and estuarine areas of Aluviões do Tejo and Bacia do Tejo-Sado/Margem Esquerda aquifers. 4p DHA/NRE

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    Authors: Gonçalves, Gabriela Ribeiro da Silva;

    Relatório de Estágio do Mestrado em Ensino de Geografia no 3º ciclo do Ensino Básico e no Ensino Secundário apresentado à Faculdade de Letras O presente relatório de estágio visa apresentar uma análise e reflexão das atividades letivas e extralectivas ao longo do Estágio Pedagógico Supervisionado, desenvolvido na Escola Secundária Dr.ª Maria Cândida, em Mira, durante o ano letivo 2020/2021. Além disso, pretendo efetuar uma reflexão da aplicação da estratégia didático-pedagógica, neste caso concreto a Aplicação dos Media na Educação Geográfica e Ambiental, caso específico do Jornal aplicado ao tema das Alterações Climáticas. O relatório está dividido em três partes. A primeira parte, onde é feita a descrição geral da escola, acompanhado do enquadramento geográfico, turma, núcleo de estágio e das atividades realizadas ao longo do estágio. A segunda parte, está direcionada para a reflexão teórica e científica associada ao tema da aplicação didática.O tema da componente científica é as Alterações Climáticas e os seus impactos na saúde humana, assim como o surgimento ou ressurgimento de doenças parasitárias na Europa. Na terceira parte é apresentada a estratégia didática, o jornal realizado pelos alunos, acompanhado dos resultados obtidos ao inquérito realizado aos professores do agrupamento e aos alunos sobre o mesmo. Neste capítulo também se encontra uma reflexão sobre o ensino à distância e os impactos na aprendizagem tanto nos professores como alunos. Os objetivos propostos para esta estratégia foram positivos, uma vez que obtive o feedback desejado por parte dos alunos, assim como toda a dedicação na construção do jornal. This internship report aims to present an analysis and reflection of teaching and extralegal activities throughout the Supervised Pedagogical Internship, developed in Escola Secundária Dr. ª Maria Cândida, in Mira, during the school year 2020/2021. In addition, I intend to reflect on the application of didactic-pedagogical strategy, in this specific case the Application of Media in Geographic and Environmental Education, the specific case of the newspaper applied to the theme of Climate Change.The report is divided in three parts. The first part, where the general description of the school is made, accompanied by the geographic framing, class, internship nucleus and the activities carried out throughout the internship. The second part is directed towards the theoretical and scientific reflection associated with the theme of didactic application. The theme of the scientific component is Climate Change and its impacts on human health, as well as the emergence or resurgence of parasitic diseases in Europe.In the third part, the didactic strategy is presented, the newspaper made by the students, accompanied by the results obtained from the survey carried out to the teachers of the grouping and to the students about it. In this chapter there is also a reflection on distance learning and the impacts on learning for both teachers and students. The objectives proposed for this strategy were positive, since I obtained the desired feedback from the students, as well as all the dedication in the construction of the newspaper.

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    Estudo Geral
    Master thesis . 2021
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      Estudo Geral
      Master thesis . 2021
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    Authors: Martins, Sandra; Gonçalves, Alexandre; Silva, Ermelinda; Brito, Cátia; +5 Authors

    With the advances of climate change, it is expected harmful consequences to olive tree (Olea europaea L.). Therefore, it is necessary to develop cost-effective practices to reduce the vulnerability of olive crops to the adverse impacts of environmental stresses. Rainfed olive trees were sprayed with zeolites, natural crystalline aluminosilicates, and its effects on photosynthetic activity, phenolic composition, antioxidant activity, leaf minerais concentrations, plant growth, yield, and olive oil quality were assessed. Zeolites application enhanced photosynthetic activity, as well the concentrations of N, Mg, Cu, Zn and Mn in leaves, and changed the secondary metabolism, with decrease oftotal phenols, ortho-diphenols and total antioxidant activity, signs of lower oxidative stress. As consequence, zeolites boosted plant growth, crop yield, and size and weight of fruits. The foliar spray did not significantly affect the oil quality indices free acidity, peroxide value and Km and K270 coefficients. This study strongly suggests that folial' zeolites might be an effective strategy to mitigate the adverse environmental conditions. This research was funded by the Foundation for Science and Technology (FCT, Portugal) and FEDER under Programme PT2020 for financiai support to ClTAB (UIDB/04033/2020), and the Operational Group "Novas práticas em olivais de sequeiro: estratégias de mitigação e adaptação às alterações climáticas" I funded by PT2020 and EAFRD (European Agricultural Fund for Rural Development). Sandra Martins acknowledges the financiai support provided by the FCT-Portuguese Foundation for Science and Technology (PD/BD/135327/2017), under the Doctoral programme "Agricultural Production Chains-from fork to farm". info:eu-repo/semantics/publishedVersion

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    Biblioteca Digital do IPB
    Conference object . 2021
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    Authors: Andrade, José; Abreu, Francisco;

    In Mediterranean-type climates crop yield depends strongly on the early development of individual plants. Extreme variations of soil temperature close to the surface of bare soils and fast changes of soil water content due to irregular rainfall and high evaporative demand reduce the success of germination, emergence and early leaf production, reducing crop productivity. According to IPCC Fourth Assesment report, climate change in Southern Europe “is projected to worsen hygrometric and thermal conditions (high temperature and drought) and to reduce water availability” and, consequently, to decrease general crop productivity. The aim of this study was to evaluate the thermal conditions in the top soil layer under different climate change scenarios, and their effects on the early development of some representative crops of Mediterranean agriculture (pea, broad bean, maize and sunflower). For this purpose, soil temperatures near the surface of a Luvisol and a Vertisol during the usual sowing season of winter (October) and summer crops (April) were compared to those recorded in the air above ground, to forecast future values. The impact of simulations on the speed, size and dispersion of germination, emergence and early leaf production was estimated using values of bioclimatic parameters of the crops (cardinal temperatures and thermal times for different phases of establishment) found in the literature. In both seasons, monthly mean temperatures at soil top layer were significantly greater (*P<0.05) than those found in the air above ground. However, the relationships between air and top soil temperatures were different in both soils and in both seasons. Summer crops seem to be less affected by an increase in temperature than winter crops. Otherwise, the former seem to be more affected by a decrease in soil water availability than the later. In addition, final emergence, speed of emergence and leaf production of the different species will be more affected by global warming than the dispersion around the most likely thermal times. The magnitude of these effects depends also on the magnitude of warming.

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    Authors: Fróes Lima, Carlos Alberto, 1963-;

    Resumo: Este trabalho parte da premissa que as tecnologias para smart grid se apresentam como oportunidade para criar um novo negócio de energia. Todos os stake-holders devem ser envolvidos, e organizados para construir ou modernizar a rede de energia em seus aspectos de qualidade, disponibilidade, infraestrutura, padronização, interoperabilidade, confiabilidade e sustentabilidade. Deve-se também buscar a consciência de uso/demanda, de renda e de entendimento dos clientes de forma adequada. Pondera-se que as estratégias governamentais, no âmbito da legislação e da regulamentação, devem ser objetivas para garantir o novo negócio e proteger o interesse público. Os consumidores (como clientes) devem ser ouvidos, tornando-se partícipes ativos no mercado de energia. Com o desenvolvimento de um relacionamento dinâmico a indústria de energia necessitará de novas condições e requisitos operacionais que devem ser criados para garantir a transformação dentro e fora do ambiente de negócios regional. Foram estudadas novas tecnologias, novas possibilidades de serviços e preços. Incentivos, bem como a evolução das normas regulatórias apareceram como fundamentais para manter e expandir o fornecimento da energia e gerenciar a demanda, com implicações na melhora do relacionamento e nos investimentos/receitas para o capital investido, que necessitam resultar na ampliação da percepção de valor da energia pelos clientes. Uma avaliação para o caso brasileiro é feita considerando-se a experiência internacional até a data e através de exemplo de aplicação em consumidores residenciais como um estudo de caso. Demonstra-se o impacto para e do consumidor doméstico nos processos de uso da energia, bem como a evolução necessária de sistemas, estratégias para que se alcance o desejado momento histórico do desenvolvimento, da reorganização do mercado de energia e da legislação/regulamentação. Em suma, a evolução do negócio de energia no Brasil é um fato que, para sua eficácia, deve ser estrategicamente planejado nos diversos âmbitos de aplicação de tecnologias e modelagem do negócio, receber incentivos e ser regulado. Questões relacionadas aos investimentos a serem realizados e o retorno destes investimentos devem ser respondidas caso a caso, segundo a realidade regional das concessões, segundo as previsões de compartilhamento de custos com os consumidores e também totalmente relacionadas com a regulamentação adotada. A possiblidade da oferta de serviços e produtos para atendimento e ampliação do espaço de atuação das concessionárias brasileiras é uma transformação necessária para seu reconhecimento como provedoras de soluções energéticas. Abstract: The smart grid technologies present themselves as opportunities to create new energy business. All stake holders must be involved, organizing, building and upgrading the power grid in its aspects of quality, availability, infrastructure, standards, reliability, interconnectivity, and sustainability. It is necessary the awareness target of supply-demand, incomes and strongly understand their clients. The Governmental strategies must be clear, with regulatory and legislative initiatives to foster new business and protect the public interest. Consumers (as clients) must be heard, as they become active players in the energy market. As they develop a dynamic relationship with the operating power industry new conditions and requirements need to be created in order to lead the strategic transformation inside and outside regional businesses. Deals on new energy sources, new technologies, new possibilities of differentials service and prices were studied. Incentives as well as the evolution of regulation rules seem a fundamental role to maintain and to expand the power supply and demand-side management, with implications for a better relationship between client-consumers, dealers and incomes/revenues on invested capital. It is also important to relate and to rethink the affordability of the tariffs and energy delivery costs to clients. An evaluation to the Brazilian market was done, considering the up to date international experiences and running an application, specially built to demonstrate the domestic consumption, as a case study. This implemented case is presented in order to demonstrate the domestic consumer impact to the energy use as well as the required evolution of systems and strategies to move on to this historical moment of development and reorganization of the energy market as well as the legislation/regulation. To sum up, evolving energy business in Brazil does not appear in this analysis merely as a possibility but as fact to be accomplished. It should be strategically planned considering the scope of a number of different technology applications, business models and be promoted by the policies agencies. Questions related to investments and their profits should be answered according to the regional energy business, as well as the consumer's participation and obviously new legislation and market regulation. Services and products to be offered by the Brazilian energy dealers should evolve correspondingly in order to improve business and recognition as energy solution providers Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica Doutor em Planejamento de Sistemas Energéticos Orientador: Gilberto De Martino Jannuzzi Planejamento de Sistemas Energéticos Doutorado

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    Authors: Serrano, Diego Machado Carrion;

    Abstract: Pellets is a solid biofuel that has been fairly used in developed countries of temperate climate. In recent years its consumption has increased for residential heating and electricity and thermal generation in co-firing plants, particularly in Europe, that is worldwide the largest pellets' market. Brazil has good potential to be a supplier in the emerging pellets market due to its forest tradition, adequate weather, land availability and a well-organized forestry segment. Based on the availability of biomass, it can be considered that there are two regions in Brazil that are promising for pellets production from wood waste: the North and South regions, but with a strong advantage of the second due to the supply chain of forest products based on commercial plantations; the production in the North region would suffer severe constraints due to the difficulty in tracking the sources of biomass. The assessment regarding the potential of pellets production for exporting is based on a hypothetical venture aiming at producing woodpellets in Paraná, considering real market conditions and logistics. The results indicate that a pellets plant with capacity to produce 100,000 t of pellets/year, biomass price turning around US$ 19.00/m3, and pellets price at European harbors (CIF value) as ¿ 140 per tonne, would be feasible, with an IRR of 17% or a NPV of US$ 1.7 million at a discount rate of 13%. The two main important factors in the final cost are the shipping cost from Brazil to Europe and the price of the raw material (i.e., its opportunity cost). As expected, the economic feasibility depends on the cost of raw material, as well as on the price paid for the product in European harbors. Resumo: O pellets é um bioenergético de uso relativamente difundido em países desenvolvidos de clima temperado, tendo sido nos últimos anos empregado de forma crescente como fonte de energia em aquecimento residencial e na geração de energia elétrica e térmica, em unidades "co-firing", principalmente na Europa, que é o maior mercado consumidor do produto. Nesse contexto, o Brasil, por possuir vocação florestal devido ao clima, disponibilidade de terras e ter segmento florestal bem estruturado, apresenta potencial para se inserir como supridor nesse mercado. Na elaboração desta dissertação, considerada a disponibilidade de biomassa, duas regiões foram identificadas como as mais promissoras para a produção de pellets a partir dos resíduos de madeira: as regiões Norte e Sul, sendo que a segunda tem significativa vantagem por possuir uma cadeia de produtos florestais fundamentada na silvicultura (florestas plantadas), enquanto na primeira haveria severas restrições devido à dificuldade de rastreamento da origem da biomassa. Foi feita a análise econômica de um empreendimento hipotético voltado à produção de pellets de madeira situado na região Sul do país, sob condições reais de mercado e logística. Os resultados indicam que, para uma planta pelletizadora com capacidade de 100.000 toneladas de pellets/ano, preço da biomassa em torno dos R$ 35,00/m3 e com preços de pellets a granel em porto na Europa (CIF) fixado em 140 ¿/tonelada, o empreendimento é viável, com TIR de 17% e VPL de R$ 3.6 milhões para taxa de desconto de 13%. O custo do frete marítimo é determinante na estrutura de custos, seguido do preço da matéria prima. Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica Mestre em Planejamento de Sistemas Energéticos Orientador: Arnaldo Cesar da Silva Walter Mestrado

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    Authors: Rossi, Raquel Andrade de;

    Resumo: O bagaço da cana-de-açúcar é considerado uma biomassa lignocelulósica promissora para a produção de etanol, devido a sua composição em açúcares, grande disponibilidade e baixo custo. A levedura Saccharomyces cerevisiae, embora apresente atributos ideais para o uso industrial, não é capaz de fermentar alguns açúcares presentes nesta biomassa, como xilose e arabinose (açúcares não convencionais). Assim, é interessante a busca por leveduras em nichos ecológicos onde esses açúcares estão presentes. O Brasil apresenta uma rica biodiversidade, qualificada pela diversidade em: ecossistemas, espécies biológicas e endemismos. Utilizar ecossistemas característicos do território brasileiro como fonte de coleta oferece a oportunidade não só de obter novas espécies, mas também de isolar aquelas capazes de fermentar diferentes substratos. De acordo com o exposto, o objetivo deste trabalho foi de isolar, a partir de amostras de biomas brasileiros, leveduras que apresentassem a habilidade em fermentar alguns açúcares, além da glicose e frutose, especialmente os que compõem o hidrolisado do bagaço da cana-de-açúcar (açúcares não convencionais). Os resultados demonstraram que as linhagens isoladas não apresentaram habilidade em fermentar as principais pentoses (xilose e arabinose) presentes no bagaço da cana-de- açúcar. Contudo, 19 foram capazes de assimilar a xilose, e 12 linhagens, a arabinose. Desta forma, como sugestão, o hidrolisado do bagaço da cana-de-açúcar pode ser utilizado para a produção de biomassa protéica (single cell protein) pelas linhagens que assimilaram xilose e arabinose Abstract: Sugarcane bagasse is considered a promising lignocellulosic biomass for ethanol production, due to its sugar composition, high availability and low price. Although, Saccharomyces cerevisiae has the ideal attributes for industrial use, it is not able to ferment some sugars present in this biomass such as xylose and arabinose (non-convencional sugars). Thus, it is interesting to search for yeasts in ecological niches where these sugars are present. Brazil has a rich biodiversity, qualified for its diversity in: ecosystems, biological species and endemisms. To use the ecosystems characteristics of the Brazilian territory as a source for sample collection offers the opportunity not only to obtain new species, but also to isolate those capable of fermenting diverse substrates. Therefore, the aim of this study was to isolate from samples of Brazilian biomes, yeasts that have the ability to ferment some sugars, besides glucose and fructose, especially those components of the sugarcane bagasse hydrolizate (non-convencional sugars). The results demonstrated that the isolated strains had no ability to ferment the main pentoses (xylose and arabinose) present in sugarcane bagasse. However, 19 strains were able to assimilate xylose, and 12 strains, arabinose. Thus, as suggestion, the sugarcane bagasse hydrolyzate can be used for the production of single cell protein by the strains that assimilate xylose and arabinose Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos Orientador: Lucia Regina Durrant Mestre em Ciência de Alimentos Mestrado

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    Authors: Cervone, Camila Ortolan Fernandes de Oliveira;

    Resumo: A sustentabilidade dos biocombustíveis é uma questão polêmica, que ganhou grande dimensão desde a segunda metade da década passada. Nesse contexto, biodiversidade é um dos aspectos mais mencionados no debate internacional. Em função das pressões de diferentes segmentos sociais, critérios de sustentabilidade foram definidos e têm condicionado a aplicação de políticas de fomento aos biocombustíveis. Na prática, esquemas de certificação têm sido usados de forma crescente e nada indica que essa tendência seja alterada. Assim, a futura produção de etanol de cana de açúcar no Brasil, e a competitividade da produção nacional em mercados internacionais, estarão condicionadas a que sustentabilidade seja uma realidade, e possa ser comprovada. No Brasil, muito pouco se sabe sobre os impactos da produção de cana, e de etanol, sobre a biodiversidade, e foi isso que motivou esta dissertação. Seu objetivo geral é o entendimento da questão biocombustíveis-biodiversidade, incluindo a identificação do conhecimento existente, das diferentes visões, das aspirações, etc. A análise foi feita com foco na produção de etanol de cana, nas condições brasileiras, e de suas perspectivas. Um dos objetivos específicos foi definido na avaliação dos esquemas de certificação, e como neles a biodiversidade tem sido tratada. Uma das conclusões desta dissertação é que, não só no Brasil, ainda pouco se sabe sobre os impactos dos biocombustíveis sobre a biodiversidade. Segundo, biodiversidade é um tema complexo, que tem várias dimensões, e em um esquema de certificação não se pode ter as mesmas ambições de avaliação e monitoramento de trabalhos científicos. Mais ainda, esquemas de certificação são instrumentos de mercado, e precisam ser definidos tendo-se em mente aspectos condicionantes como a praticidade, os custos, e as responsabilidades que podem ser atribuídas ao agente econômico que é avaliado. Entretanto, em geral os esquemas de certificação de biocombustíveis são mais rigorosos do que os esquemas que tratam de produtos florestais e alimentícios, e estão alinhados com os indicadores recomendados para empresas de energia. De qualquer forma, mecanismos de certificação têm um importante papel a cumprir no fomento às iniciativas, na disseminação de informações e na diferenciação de produtores e produtos. As normas devem ser entendidas como complementares à regulação pública e, dessa forma, podem ser muito úteis. Finalmente, conclui-se que as leis e a regulação do uso da terra no Brasil (e.g., o Código Florestal, o Zoneamento Agroecológico e a definição de Áreas Prioritárias de Conservação) podem ser, desde que adequadamente aplicadas, suficientes para que os potenciais impactos sobre a biodiversidade sejam evitados ou minimizados. Com a legislação existente, e com a pressão do mercado e dos segmentos sociais, a produção de etanol de cana no Brasil tem amplas condições de ser cada vez mais sustentável, de uma forma geral, e menos impactante sobre a biodiversidade, em particular Abstract: The sustainability of biofuels is a controversial issue, which gained large dimension since the second half of last decade. In this context, biodiversity is one of the most mentioned aspects in the international debate. Because of pressure from different social segments, sustainability criteria have been defined and have conditioned the application of policies to promote biofuels. In practice, certification schemes have been increasingly used and there is no indication that this trend will change. Thus, future production of ethanol from sugarcane in Brazil, and the competitiveness of national production in international markets, will depend on the fact that sustainability is a reality, and may be proved. In Brazil, very little is known about the impacts of sugarcane and ethanol production on biodiversity, and that was what motivated this dissertation. Its overall goal is to understand the issue biofuels-biodiversity, including the identification of existing knowledge, the different visions, aspirations, etc. The analysis was focused on the production of ethanol from sugarcane in Brazilian conditions, and perspectives. One of the specific objectives was defined in the assessment of certification schemes, and how biodiversity has been addressed. One of the conclusions of this dissertation is that very little is known about the impacts of biofuels on biodiversity, worldwide. Second, biodiversity is a complex issue that has many dimensions, and through a certification scheme is not possible to assess and monitor biodiversity as in scientific research. Furthermore, certification schemes are market instruments, and must be defined taking into account aspects as practicality, costs, and responsibilities that can be assigned to the economic agent that is certified. However, in general certification schemes of biofuels are stricter than certification schemes of forest and food products, and are aligned with the indicators recommended for energy companies. Anyway, certification mechanisms have an important role to play in fostering initiatives, in disseminating information and on differentiating producers and products. But the standards should be understood as complementary to public regulation, and thus they can be very useful. Finally, a conclusion of this dissertation is that the laws and regulations already available in Brazil regarding land use (e.g., the Forest Code, the Agro-ecologic Zoning and the definition of Priority Areas for Conservation) can be sufficient for avoiding or minimizing the potential impacts over biodiversity but, obviously, depending on their enforcement. With the existing legal and regulatory environment, combined with pressures from the market and from social actors, the sustainability of ethanol production from sugarcane in Brazil can be improved. This can result in even more sustainable production in general, and less impacts over biodiversity, in particular Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica Mestra em Planejamento de Sistemas Energéticos Orientadores: Arnado Walter, Pita A. Verweij Planejamento de Sistemas Energéticos Mestrado

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