991 resultados para union power


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The bilateral relationship between the EU and China has a tendency toward growth in recent years. At present, China’s economic development is at a critical transition period for deepening reform in the economic structure. The economic and trade cooperation with the countries of the European Union has a significant influence for the stability of trade development and economic growth. Therefore China tries to expand cooperation and eliminate the issues and difficulties that exist, it will more often to promote cooperation between the two parties towards deeper into various cooperative areas.

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This article intends to study the evolution of the European Union foreign policy in the Southern Caucasus and Central Area throughout the Post-Cold War era. The aim is to analyze Brussels’ fundamental interests and limitations in the area, the strategies it has implemented in the last few years, and the extent to which the EU has been able to undermine the regional hegemons’ traditional supremacy. As will be highlighted, the Community’s chronic weaknesses, the local determination to preserve sovereignty and an increasing international geopolitical competition undermine any European aspiration to become a pre-eminent actor at the heart of the Eurasian continent in the near future.

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The European Union continues to exert a large influence on the direction of member states energy policy. The 2020 targets for renewable energy integration have had significant impact on the operation of current power systems, forcing a rapid change from fossil fuel dominated systems to those with high levels of renewable power. Additionally, the overarching aim of an internal energy market throughout Europe has and will continue to place importance on multi-jurisdictional co-operation regarding energy supply. Combining these renewable energy and multi-jurisdictional supply goals results in a complicated multi-vector energy system, where the understanding of interactions between fossil fuels, renewable energy, interconnection and economic power system operation is increasingly important. This paper provides a novel and systematic methodology to fully understand the changing dynamics of interconnected energy systems from a gas and power perspective. A fully realistic unit commitment and economic dispatch model of the 2030 power systems in Great Britain and Ireland, combined with a representative gas transmission energy flow model is developed. The importance of multi-jurisdictional integrated energy system operation in one of the most strategically important renewable energy regions is demonstrated.

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Studies have shown that large geographical spreading can reduce the wind power variability and smooth production. It is frequently assumed that storage and interconnection can manage wind power variability and are totally flexible. However, constraints do exist. In the future more and more electricity will be provided by renewable energy sources and more electricity interconnectors will be built between European Union (EU) countries, as outlines in many of the Projects of Common Interests. It is essential to understand the correlation of wind generation throughout Europe considering power system constraints. In this study the spatial and temporal correlation of wind power production across several countries is examined in order to understand how “the wind ‘travels’ across Europe”. Three years of historical hourly wind power generation from ten EU countries is analysed to investigate the geographic diversity and time scales influence on correlation of wind power variations. Results are then compared with two other studies and show similar general characteristics of correlation between EU country pairs to identify opportunities for storage optimisation, power system operations, and trading.

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With growing demand for liquefied natural gas (LNG) and liquid transportation fuels, and concerns about climate change and causes of greenhouse gas emissions, this master’s thesis introduces a new value chain design for LNG and transportation fuels and respective fundamental business cases based on hybrid PV-Wind power plants. The value chains are composed of renewable electricity (RE) converted by power-to-gas (PtG), gas-to-liquids (GtL) or power-to-liquids (PtL) facilities into SNG (which is finally liquefied into LNG) or synthetic liquid fuels, mainly diesel, respectively. The RE-LNG or RE-diesel are drop-in fuels to the current energy system and can be traded everywhere in the world. The calculations for the hybrid PV-Wind power plants, electrolysis, methanation (H2tSNG), hydrogen-to-liquids (H2tL), GtL and LNG value chain are performed based on both annual full load hours (FLh) and hourly analysis. Results show that the proposed RE-LNG produced in Patagonia, as the study case, is competitive with conventional LNG in Japan for crude oil prices within a minimum price range of about 87 - 145 USD/barrel (20 – 26 USD/MBtu of LNG production cost) and the proposed RE-diesel is competitive with conventional diesel in the European Union (EU) for crude oil prices within a minimum price range of about 79 - 135 USD/barrel (0.44 – 0.75 €/l of diesel production cost), depending on the chosen specific value chain and assumptions for cost of capital, available oxygen sales and CO2 emission costs. RE-LNG or RE-diesel could become competitive with conventional fuels from an economic perspective, while removing environmental concerns. The RE-PtX value chain needs to be located at the best complementing solar and wind sites in the world combined with a de-risking strategy. This could be an opportunity for many countries to satisfy their fuel demand locally. It is also a specific business case for countries with excellent solar and wind resources to export carbon-neutral hydrocarbons, when the decrease in production cost is considerably more than the shipping cost. This is a unique opportunity to export carbon-neutral hydrocarbons around the world where the environmental limitations on conventional hydrocarbons are getting tighter.

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Introduction An overview of media markets shows that rapid growth and the integration of some of the most dynamic market segments are characteristics of this fast-moving industry. The main players are the established incumbents upstream and the delivery segments of media downstream. The presence of incumbents, inheritors of previous public monopolies, has led Member States to use regulation in a complementary role with competition. In these markets, strategies to deliver new products and services and to serve new geographic markets focus less on organic growth than on alliances and mergers in order to create multi-media offshoots, bid for control of content rights, increase the diffusion of products and services, and develop technologies for conditional access and transmission standards to capture advantages through proprietary technology. As a result, vertically integrated dominant positions either upstream or downstream have tended to emerge. There is nothing wrong with vertical integration except when there is market power at one stage of the vertical chain. Indeed, as far as the media industry is concerned, there are some specific challenges at the European level. The new EU regulatory framework grants some specific competition principles which can be integrated into ex ante regulation. EU merger control may also prevent potential distortion of competition resulting from the creation or the strengthening of a single or collective dominant position in the media sector at a horizontal level, or from foreclosure effects at a vertical level.

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The present study explores EUropean geopolitical agency in a distinct spatio-temporal context: the Arctic region of the early 21st century. Thus, it provides an in-depth analysis of the European Union’s process to construct EUropean legitimacy and credibility in its ‘Northern Neighbourhood’ between 2008 and 2014. Embedded in a conceptual and methodological framework using critical geopolitics, this study assesses the strategic policy reasoning of the EU and the implicit geopolitical discourses that guide and determine a particular line of argumentation so as to claim a ‘legitimate’ role in the Arctic and accordingly construct a distinct ‘EUropean Arctic space’. In doing so, it establishes a clearer picture on the (narrated) regional interests of the EU and the related developed policy and concrete steps taken in order to get hold of these interests. Eventually, the analysis gets to the conceptual bottom of what exactly fashioned the EU with geopolitical agency in the circumpolar North. As a complementary explanation, this study provides a thick description of the area under scrutiny – the Arctic region – in order to explicate the systemic context that conditioned the EU’s regional demeanour and action. Elucidated along the lines of Arctic history and identity, rights, interests and responsibility, it delineates the emergence of the Arctic as a region of and for geopolitics. The findings indicate that the sui generis character of the Arctic as EUropean neighbourhood essentially determined the EU’s regional performance. It explicates that the Union’s ‘traditional’ geopolitical models of civilian or normative power got entangled in a fluid state of Arctic affairs: a distinct regional system, characterised by few strong state actors with pronounced national Arctic interests and identities, and an indefinite local context of environmental changes, economic uncertainties and social challenges. This study applies critical geopolitics in a Political Science context and essentially contributes to a broader understanding of EU foreign policy construction and behaviour. Ultimately, it offers an interdisciplinary approach on how to analyse EU external action by explicitly taking into account the internal and external social processes that ultimately condition a certain EUropean foreign policy performance.

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The European Commission has been negotiating Economic Partnership Agreements (EPAs) with Regional Economic Communities of African, Caribbean and Pacific Group of States since 2002. The outcomes have been mixed. The negotiations with the Caribbean Forum (CARIFORUM) concluded rather more quickly than was initially envisaged, whereas negotiations with West African Economic Community (ECOWAS) and the remaining ACP regions have been dragging on for several years. This research consequently addresses the key question of what accounts for the variations in the EPA negotiation outcomes, making use of a comparative research approach. It evaluates the explanatory power of three research variables in accounting for the variation in the EPA negotiations outcomes – namely, Best Alternative to the Negotiated Agreement (BATNA); negotiation strategies; and the issues linkage approach – which are deduced from negotiation theory. Principally, the study finds that, the outcomes of the EPA negotiations predominantly depended on the presence or otherwise of a “Best Alternative” to the proposed EPA; that is then complemented by the negotiation strategies pursued by the parties, and the joint application of issues linkage mechanism which facilitated a sense of mutual benefit from the agreements.

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The aim of my thesis is to investigate the possibility and necessity to rethink a constitutional framework and debate in a transnational polity such as the European Union. My effort focuses on a promising theory called deliberative constitutionalism, which carries on new insights on how democracy and constitutions relate each other. The EU is a unique political entity which poses unanswered questions about its political legitimacy and constitutional foundation, if a Constitution will ever be possible. Going beyond the classical conception of the national and sovereign ‘people’, we keep wondering how citizens may deliberate and discuss about their rights and political communities across borders, in what could be defined as a transnational civic society. The development of the latter brings with it necessary constitutional changes, if not an evolution of constitutionalism itself. Chapter 1 deals with defining the theoretical framework, which develops the distinctiveness of the deliberative constitutional paradigm not only with respect to other more 'classical' models of democracy, but also with respect to other deliberative models that have marked the constructivist debate. Chapter 2 presents a conceptual history of constituent power, mainly studying the evolution of the constitution-sovereignty-constituent power dialectic, up to contemporary theories that explain the negation, separation, union or plurality of a transnational constituent with respect to its national counterparts. Chapter 3 develops the discourse of constitutional pluralism, through its main claims and strands that especially pertain to Neil Walker's (2002, 2016) institutional and epistemic claims. Chapter 4 applies a deliberative constitutionalist framework to the case of the European Union. Through the exposition of DC normative tenets, a form of self-learning process is proposed that can reconcile the heterarchical arrangement of constitutional claims and the new demand for legitimacy, as well as the relationship between European peoples and European citizens.

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Universidade Estadual de Campinas. Faculdade de Educação Física

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Universidade Estadual de Campinas . Faculdade de Educação Física

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OBJECTIVE: This in situ study evaluated the discriminatory power and reliability of methods of dental plaque quantification and the relationship between visual indices (VI) and fluorescence camera (FC) to detect plaque. MATERIAL AND METHODS: Six volunteers used palatal appliances with six bovine enamel blocks presenting different stages of plaque accumulation. The presence of plaque with and without disclosing was assessed using VI. Images were obtained with FC and digital camera in both conditions. The area covered by plaque was assessed. Examinations were done by two independent examiners. Data were analyzed by Kruskal-Wallis and Kappa tests to compare different conditions of samples and to assess the inter-examiner reproducibility. RESULTS: Some methods presented adequate reproducibility. The Turesky index and the assessment of area covered by disclosed plaque in the FC images presented the highest discriminatory powers. CONCLUSION: The Turesky index and images with FC with disclosing present good reliability and discriminatory power in quantifying dental plaque.

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Bloodsucking parasites such as ticks have evolved a wide variety of immunomodulatory proteins that are secreted in their saliva, allowing them to feed for long periods of time without being detected by the host immune system. One possible strategy used by ticks to evade the host immune response is to produce proteins that selectively bind and neutralize the chemokines that normally recruit cells of the innate immune system that protect the host from parasites. We have identified distinct cDNAs encoding novel chemokine binding proteins (CHPBs), which we have termed Evasins, using an expression cloning approach. These CHBPs have unusually stringent chemokine selectivity, differentiating them from broader spectrum viral CHBPs. Evasin-1 binds to CCL3, CCL4, and CCL18; Evasin-3 binds to CXCL8 and CXCL1; and Evasin-4 binds to CCL5 and CCL11. We report the characterization of Evasin-1 and -3, which are unrelated in primary sequence and tertiary structure, and reveal novel folds. Administration of recombinant Evasin-1 and - 3 in animal models of disease demonstrates that they have potent antiinflammatory properties. These novel CHBPs designed by nature are even smaller than the recently described single-domain antibodies (Hollinger, P., and P. J. Hudson. 2005. Nat. Biotechnol. 23: 1126-1136), and may be therapeutically useful as novel antiinflammatory agents in the future.

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This work deals with an improved plane frame formulation whose exact dynamic stiffness matrix (DSM) presents, uniquely, null determinant for the natural frequencies. In comparison with the classical DSM, the formulation herein presented has some major advantages: local mode shapes are preserved in the formulation so that, for any positive frequency, the DSM will never be ill-conditioned; in the absence of poles, it is possible to employ the secant method in order to have a more computationally efficient eigenvalue extraction procedure. Applying the procedure to the more general case of Timoshenko beams, we introduce a new technique, named ""power deflation"", that makes the secant method suitable for the transcendental nonlinear eigenvalue problems based on the improved DSM. In order to avoid overflow occurrences that can hinder the secant method iterations, limiting frequencies are formulated, with scaling also applied to the eigenvalue problem. Comparisons with results available in the literature demonstrate the strength of the proposed method. Computational efficiency is compared with solutions obtained both by FEM and by the Wittrick-Williams algorithm.