972 resultados para MAGNETOHYDRODYNAMIC TURBULENCE


Relevância:

10.00% 10.00%

Publicador:

Resumo:

Tese de doutoramento, História (História de Arte), Universidade de Lisboa, Faculdade de Letras, 2016

Relevância:

10.00% 10.00%

Publicador:

Resumo:

The initial ‘framing’ (in the summer of 2012) of the ‘genuine EMU’ for the wider public suggested to design an entire series of ‘unions’. So many ‘unions’ are neither necessary nor desirable – only some are and their design matters. The paper critically discusses first the negative fall-out of the crisis for EMU, and subsequently assesses the fiscal and the banking unions as accomplished so far, without going into highly specific technical details. The assessment is moderately positive, although there is ample scope for further improvement and a risk for short-term turbulence once the ECB has finished its tests and reviews. What about the parade of other ’unions’ such as economic union, social union and political union? The macro-economic imbalances procedure (MIP) and possibly the ESRB have overcome the pre-crisis disregard of macro competitiveness. The three components of ‘economic union’ (single market, economic policy coordination and budgetary disciplines) have all been strengthened. The last two ‘unions’, on the other hand, would imply a fundamental change in the conferral of powers to the EU/ Eurozone, with drastic and possibly very serious long-run implications, including a break-up of the Union, if such proposals would be pushed through. The cure is worse than the disease. Whereas social union is perhaps easier to dismiss as a ‘misfit’ in the EU, the recent popularity of suggesting a ‘political union’ is seen as worrisome. Probably, nobody knows what a ‘political union’ is, or, at best, it is a highly elastic notion: it might be thought necessary for reasons of domestic economic reforms in EU countries, for a larger common budget, for some EU tax power, for (greater) risk pooling, for ‘symmetric’ macro-economic adjustment and for some ultimate control of the ECB in times of crisis. Taking each one of these arguments separately, a range of more typical EU solutions might be found without suggesting a ‘political union’. Just as ‘fiscal capacity’ was long an all-or-nothing taboo for shifting bank resolution to the EU level, now solved with a modest common Fund and carefully confined but centralised powers, the author suggests that other carefully targeted responses can be designed for the various aspects where seen as indispensable, including the political say of a lender-of-last-resort function of the ECB. Hence, neither a social nor a political union worthy of the name ought to be pursued. Yet, political legitimacy matters, both with national parliaments and the grassroots. National parliaments will have to play a larger role.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Despite significant economic reforms in many Southern Mediterranean EU neighbour countries, their growth performance has on average been subdued. This study analyses the differences in growth performance and macroeconomic stability across Mediterranean countries, to draw lessons for the future. The main findings are that Southern Mediterranean countries should benefit from closer ties with the EU that result in higher levels of trade and FDI inflows, once the turbulence of the ‘Arab Spring’ is resolved, and from the development of financial markets and infrastructure. They will also benefit in keeping inflation under control, which will depend in great part on their ability to maintain fiscal discipline and sustainable current accounts. One of the main challenges for the region will be to implement structural reforms that can help them absorb a large pool of unemployed without creating upward risks to inflation.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Against the background of the severe turbulence that is hitting global stock markets, Daniel Gros examines the looming slowdown in the Chinese economy in this CEPS Commentary, which he attributes to an underlying ‘real’ domestic investment/savings imbalance. Given the magnitude of this imbalance, Gros thinks it is unlikely to be solved by monetary policy and that the best that can be hoped for is that the central banks will manage to ‘paper over’ some of the unavoidable symptoms in credit markets.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Even before the recent terrorist attacks in Ankara, Turkey was a country in crisis. In this EPIN Commentary Umut Uzer attempts to shed light on the political turbulence and increasing polarisation in the country, and makes a plea for a return to consensus-building ahead of the fresh round of elections in November. The author also calls upon the EU to offer incentives to Turkey to continue on the path of EU membership, but if membership is out of the question, then other platforms for cooperation should be negotiated. The EU should speak in a candid manner and make clear what kind of future relationship it envisages for Turkey, because now, more than ever, cooperation is in both their interests.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

The implementation record of the Country Specific Recommendations (CSRs) has declined over time, as financial turbulence lessened and the economic outlook started to improve. Urgency for reforms seemingly receded to leave room to request member states to move towards more accommodative stances. It is mainly the small countries that implement, at least partially, the recommendations addressed to them. Unfortunately, there is little that the EU can do to change the status quo. Yet, the President of the Eurogroup could be held accountable for the implementation of the recommendations addressed to the euro area. The creation of National Competitiveness Boards risks making the European Semester even more complex and likely to have little impact in the countries that need them most, namely large countries and those with poor governance. To make it effective, a procedure would be needed to make national wage norms consistent at the euro-area level, which may be a very difficult objective to achieve.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Different parameterizations of subgrid-scale fluxes are utilized in a nonhydrostatic and anelastic mesoscale model to study their influence on simulated Arctic cold air outbreaks. A local closure, a profile closure and two nonlocal closure schemes are applied, including an improved scheme, which is based on other nonlocal closures. It accounts for continuous subgrid-scale fluxes at the top of the surface layer and a continuous Prandtl number with respect to stratification. In the limit of neutral stratification the improved scheme gives eddy diffusivities similar to other parameterizations, whereas for strong unstable stratifications they become much larger and thus turbulent transports are more efficient. It is shown by comparison of model results with observations that the application of simple nonlocal closure schemes results in a more realistic simulation of a convective boundary layer than that of a local or a profile closure scheme. Improvements are due to the nonlocal formulation of the eddy diffusivities and to the inclusion of heat transport, which is independent of local gradients (countergradient transport).

Relevância:

10.00% 10.00%

Publicador:

Resumo:

This report presents an overview of wave-current interacion, including comprehensive review of references to significant U.S. and foreign literature available through December 1981. Specific topics under review are the effects of horizontally and vertically varying currents on waves, wave refraction by currents, dissipation and turbulence, small- and medium-scale currents, caustics and focusing, and wave breaking. The results of the review are then examined for engineering applications. The most appropriate general-purpose computer program to include wave-current interaction is the Dutch Rijkswaterstaat program CREDIZ, which is based on a parabolic wave equation. Further applications include wave and current forces on structures and possibly sediment transport. The report concludes with a brief state-of-the-art review of wave-current interaction and a list of topics needing further research and development.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Cover title.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

"September 1993."

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Mode of access: Internet.

Relevância:

10.00% 10.00%

Publicador:

Resumo:

Photocopy.