912 resultados para Numerical Algorithms and Problems


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Since 2007, a series of acute crises have threatened the very existence of the euro area. The financial crisis which spilled into the currency union in 2007 was followed by an unexpectedly strong downturn of the real economy. As of 2010, the euro area was confronted with a severe sovereign debt and banking crisis. Despite these troublesome developments, the euro area has proven to have a considerable degree of resilience. In each phase, governance weaknesses were revealed – and national governments together with the EU institutions have designed an impressive series of policy responses in crisis management and institutional innovation. The euro area today is completed by a banking union with a Single Supervisory and a Single Resolution Mechanism. National budgetary and economic policies are more closely overseen and coordinated. With the European Stability Mechanism, the euro area now has a permanent tool in place to manage sovereign liquidity crises and instabilities in the banking sector. Most importantly, the euro area's only true federal institution, the European Central Bank (ECB), has become its most effective crisis manager: with the announcement of its Outright Monetary Transactions (OMT) programme, the ECB finally managed to calm the self fulfilling crisis in 2012. Meanwhile, the announcement of credit easing and quasi-quantitative easing in September 2014 is a move towards reducing financial fragmentation and countering deflation. The euro area in 2014 is hence a lot different from the one in 2007. And yet, further challenges need to be overcome. Prevailing stagnation, fragmentation and problems of legitimacy require a rethink of policies and further governance reform.

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With the EU-enlargement process well underway, this paper focuses on social citizenship as a conceptual frame for analyzing the restructuring of social institutions in applicant countries in East Central Europe. So far, comparative welfare state analysis has concentrated mainly on the developed economies of the OECD-countries; there is little systematic analytical work on the transitions in post-communist Europe. Theoretically, this paper builds on comparative welfare state analysis as well as on new institutionalism. The initial hypothesis is built on the assumption that emerging patterns of social support and social security diverge from the typology described in the comparative welfare state literature inasmuch as the transformation of postcommunist societies is distinctly different from the building of welfare states in Europe. The paper argues that institutionbuilding is shaped by and embedded in the process of European integration and part of governance in the EU. Anticipating full membership in the European Union, the applicant countries have to adapt to the rules and regulations of the EU, including the "social acquis." Therefore, framing becomes an important feature of institutional changes. The paper seeks to identify distinct patterns and problems of the institutionalization of social citizenship.

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"Readings" and "Problems" at end of each chapter.

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Includes indexes.

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Another version published under title: Laboratory studies and problems in general chemistry.

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Shelved with Questions and problems, HF5681.B2K45.1962.suppl

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Thesis (Ph.D.)--University of Washington, 2016-06

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Thesis (Ph.D.)--University of Washington, 2016-06

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Thesis (Master's)--University of Washington, 2016-06

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Thesis (Ph.D.)--University of Washington, 2016-05

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The multibody dynamics of a satellite in circular orbit, modeled as a central body with two hinge-connected deployable solar panel arrays, is investigated. Typically, the solar panel arrays are deployed in orbit using preloaded torsional springs at the hinges in a near symmetrical accordion manner, to minimize the shock loads at the hinges. There are five degrees of freedom of the interconnected rigid bodies, composed of coupled attitude motions (pitch, yaw and roll) of the central body plus relative rotations of the solar panel arrays. The dynamical equations of motion of the satellite system are derived using Kane's equations. These are then used to investigate the dynamic behavior of the system during solar panel deployment via the 7-8th-order Runge-Kutta integration algorithms and results are compared with approximate analytical solutions. Chaotic attitude motions of the completely deployed satellite in circular orbit under the influence of the gravity-gradient torques are subsequently investigated analytically using Melnikov's method and confirmed via numerical integration. The Hamiltonian equations in terms of Deprit's variables are used to facilitate the analysis. (C) 2003 Published by Elsevier Ltd.

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As medical education increasingly acknowledges the importance of the ethical and professional conduct of practitioners, and moves towards more formal assessment of these issues, it is important to consider the evidence base which exists in this area. This article discusses literature about the health needs and problems experienced by medical practitioners as a background to a review of the current efforts in medical education to promote ethical conduct and develop mechanisms for the detection and remediation of problems.

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We compare and contrast the entanglement in the ground state of two Jahn-Teller models. The Exbeta system models the coupling of a two-level electronic system, or qubit, to a single-oscillator mode, while the Exepsilon models the qubit coupled to two independent, degenerate oscillator modes. In the absence of a transverse magnetic field applied to the qubit, both systems exhibit a degenerate ground state. Whereas there always exists a completely separable ground state in the Exbeta system, the ground states of the Exepsilon model always exhibit entanglement. For the Exbeta case we aim to clarify results from previous work, alluding to a link between the ground-state entanglement characteristics and a bifurcation of a fixed point in the classical analog. In the Exepsilon case we make use of an ansatz for the ground state. We compare this ansatz to exact numerical calculations and use it to investigate how the entanglement is shared between the three system degrees of freedom.

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We present a fully quantum mechanical treatment of the nondegenerate optical parametric oscillator both below and near threshold. This is a nonequilibrium quantum system with a critical point phase transition, that is also known to exhibit strong yet easily observed squeezing and quantum entanglement. Our treatment makes use of the positive P representation and goes beyond the usual linearized theory. We compare our analytical results with numerical simulations and find excellent agreement. We also carry out a detailed comparison of our results with those obtained from stochastic electrodynamics, a theory obtained by truncating the equation of motion for the Wigner function, with a view to locating regions of agreement and disagreement between the two. We calculate commonly used measures of quantum behavior including entanglement, squeezing, and Einstein-Podolsky-Rosen (EPR) correlations as well as higher order tripartite correlations, and show how these are modified as the critical point is approached. These results are compared with those obtained using two degenerate parametric oscillators, and we find that in the near-critical region the nondegenerate oscillator has stronger EPR correlations. In general, the critical fluctuations represent an ultimate limit to the possible entanglement that can be achieved in a nondegenerate parametric oscillator.