20,573 research outputs found

    The M2 slowdown and depository intermediation: implications for monetary policy

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    An examination of credit flow rechanneling away from depository institutions over the past decade in response to evolving financial markets and regulatory structure, and a discussion of how this trend has complicated monetary policymaking.Money supply ; Monetary policy

    Courage to Capital? A Model of the Effects of Rating Agencies on Sovereign Debt Role-over

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    We propose a model of rating agencies that is an application of global game theory in which heterogeneous investors act strategically. The model allows us to explore the impact of the introduction of a rating agency on financial markets. Our model suggests that the addition of the rating agency affects the probability of default and the magnitude of the response of capital flows to changes in fundamentals in a non–trivial way, and that introducing a rating agency can bring multiple equilibria to a market that otherwise would have the unique equilibrium.Credit rating, Rating agency, Sovereign debt, Global game

    Application of direct-inverse techniques to airfoil analysis and design

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    The direct-inverse technique was developed into a numerical method, called TRANDES, that is suitable for the analysis and design of subsonic and transonic airfoils and for the evaluation of design concepts. A general description of the method is given and its application to a design analysis type of problem is demonstrated. A usage of the method for the low speed high lift case is discussed

    Effective Widths and Effective Number of Phonons of Multiphonon Giant Resonances

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    We discuss the origin of the difference between the harmonic value of the width of the multiphonon giant resonances and the smaller observed value. Analytical expressions are derived for both the effective width and the average cross-section. The contribution of the Brink-Axel mechanism in resolving the discrepancy is pointed out.Comment: 9 pages, 4 figure

    The importance of local band effects for ferromagnetism in hole doped La2_2CuO4_4

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    Band calculations for supercells of La(2−x)_{(2-x)}Bax_xCuO4_4 show that the rigid band model for doping is less adequate than what is commonly assumed. In particular, weak ferromagnetism (FM) can appear locally around clusters of high Ba concentration. The clustering is important at large dilution and averaged models for magnetism, such as the virtual crystal approximation, are unable to stabilize magnetic moments. These results give a support to the idea that weak FM can be the cause of the destruction of superconductivity at high hole doping.Comment: 4 pages, 5 figures, accepted for publication in Physical Review Letter

    Statistical features of the thermal neutron capture cross sections

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    We discuss the existence of huge thermal neutron capture cross sections in several nuclei. The values of the cross sections are several orders of magnitude bigger than expected at these very low energies. We lend support to the idea that this phenomenon is random in nature and is similar to what we have learned from the study of parity violation in the actinide region. The idea of statistical doorways is advanced as a unified concept in the delineation of large numbers in the nuclear world. The average number of maxima per unit mass, in the capture cross section is calculated and related to the underlying cross section correlation function and found to be =3/(π2γA) = 3/(\pi \sqrt{2}\gamma_{A}), where γA\gamma_{A} is a characteristic mass correlation width which designates the degree of remnant coherence in the system. We trace this coherence to nucleosynthesis which produced the nuclei whose neutron capture cross sections are considered here.Comment: 7 pages, 6 figures. To appear in Acta Physica Polonica B as a Contribution to the proceedings of:Jagiellonian Symposium of Fundamental and Applied Subatomic Physics, June 7- 12, 2015 Krakow, Polan

    Interrelations between advanced processing techniques, integrated circuits, materials development and analysis

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    Interrelations between advanced processing techniques, integrated circuits, laser radiation, and microcircuit interconnection

    Quantum Monte Carlo calculations of excited states in A = 6--8 nuclei

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    A variational Monte Carlo method is used to generate sets of orthogonal trial functions, Psi_T(J^pi,T), for given quantum numbers in various light p-shell nuclei. These Psi_T are then used as input to Green's function Monte Carlo calculations of first, second, and higher excited (J^pi,T) states. Realistic two- and three-nucleon interactions are used. We find that if the physical excited state is reasonably narrow, the GFMC energy converges to a stable result. With the combined Argonne v_18 two-nucleon and Illinois-2 three-nucleon interactions, the results for many second and higher states in A = 6--8 nuclei are close to the experimental values.Comment: Revised version with minor changes as accepted by Phys. Rev. C. 11 page
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