997 resultados para Economic forecasts


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Introduction Tensions between the economic and the social dimensions of European integration are being perceived as increasing, and so is the potential for conflict between national and European levels of policy-making. Both are well illustrated by a highly controversial line of Court of Justice of the European Union (ECJ) cases on industrial relations: Viking and Laval have become symbols for the continuing dominance of the economic over the social dimension of European integration and for an increasing tendency of the EU to diminish national autonomy. As one consequence, demands to protect Member States’ social policy choices from EU law pressures arise. For such demands to be tenable, isolation of national and EU policy-making and of economic and social dimensions of European integration would have to be possible. This is arguably not the case. Economic and social dimensions of integration will thus have to be reconciled across EU and national levels, if the EU and its Member States are to maintain the ability of enhancing social justice against the pulls of economic globalisation.

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This article is a short introduction to a special section on economic ideas and the political construction of the financial crash. It begins by explaining why economic ideas and the politics of appeals to certain ideas are so integral to the historical significance of the crash of 2008 and the question of whether it can be considered a crash at all. The first section covers the literature on ideas and economic crisis. The second section highlights that the contribution of the special section is to engage in a stock taking exercise of the empirical and conceptual patterns concerning the politics of ideational change underway in the areas of: comparative fiscal policy; monetary policy and Euro zone debt management; capital controls; and financial and securities market regulation and standard setting. The final section outlines the structure of this special section and content of the individual articles.

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This study proposes an approach to optimally allocate multiple types of flexible AC transmission system (FACTS) devices in market-based power systems with wind generation. The main objective is to maximise profit by minimising device investment cost, and the system's operating cost considering both normal conditions and possible contingencies. The proposed method accurately evaluates the long-term costs and benefits gained by FACTS devices (FDs) installation to solve a large-scale optimisation problem. The objective implies maximising social welfare as well as minimising compensations paid for generation re-scheduling and load shedding. Many technical operation constraints and uncertainties are included in problem formulation. The overall problem is solved using both particle swarm optimisations for attaining optimal FDs allocation as main problem and optimal power flow as sub-optimisation problem. The effectiveness of the proposed approach is demonstrated on modified IEEE 14-bus test system and IEEE 118-bus test system.

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Bioenergy derived from biomass provides a promising energy alternative and can reduce the greenhouse gas (GHG) emissions generated from fossil fuels. Biomass-based thermochemical conversion technologies have been acknowledged as apt options to convert bioresources into bioenergy; this bioenergy includes electricity, heat, and fuels/chemicals in solid, liquid, and gaseous phases. In this review, the techno-economic and life cycle assessment of these technologies (combustion, gasification, pyrolysis, liquefaction, carbonization, and co-firing) are summarized. Specific indicators (production costs in a techno-economic analysis, functional units and environmental impacts in a life cycle analysis) for different technologies were compared. Finally, gaps in research and future trends in biomass thermochemical conversion were identified. This review could be used to guide future research related to economic and environmental benefits of bioenergy.

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A low cost flat plate solar collector was developed by using polymeric components as opposed to metal and glass components of traditional flat plate solar collectors. In order to improve the thermal and optical properties of the polymer absorber of the solar collector, Carbon Nanotubes (CNT) were added as a filler. The solar collector was designed as a multi-layer construction with an emphasis on low manufacturing costs. Through the mathematical heat transfer analysis, the thermal performance of the collector and the characteristics of the design parameters were analyzed. Furthermore, the prototypes of the proposed collector were built and tested at a state-of-the-art solar simulator facility to evaluate its actual performance. The inclusion of CNT improved significantly the properties of the polymer absorber. The key design parameters and their effects on the thermal performance were identified via the heat transfer analysis. Based on the experimental and analytical results, the cost-effective polymer-CNT solar collector, which achieved a high thermal efficiency similar to that of a conventional glazed flat plate solar panel, was successfully developed.