10,945 research outputs found

    The Impact of U.S. Trade Law on Government Policy Making in the Republic of China

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    Since President Reagan signed the Omnibus Trade Act on August 23, 1988, the U.S. government has completed a series of investigations according to the provisions of the Act. Consultations aimed at forcing its trading partners to adjust their trade- policies which are regarded as unfair to U.S. trade have also been held in the past ten months or so. Being one of the most important trading partners of the U.S. – both in terms of its overall trade volume and its surplus with the U.S. – the Republic of China on Taiwan (ROC) seems to have become a target of retaliatory measures implied in the Act. During the period from August of last year to this date, the U.S. has consulted intensively with the ROC on various trade issues. The possible implementation of the Trade Act seemed to have been implied throughout most of the talks. Therefore, the results of consultations often had an impact on the trade policy of the ROC. On the other hand, the adjustments that the ROC has made to cope with the new environment of the world economy have also been instrumental in formulating the ROC\u27s new trade policy. All in all, the ROC\u27s trade policy has been transformed, over the past twenty-five years, from an export-oriented one to the present one which encourages imports with a view toward balancing the two-way trade. In order to carry out this policy, the ROC has adopted a series of measures not only to expedite the liberalization of its market, but also to increase its purchases from the U.S

    Dimerized and trimerized phases for spin-2 Bosons in a one-dimensional optical lattice

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    We study the phase diagram for spin-2 bosons loaded in a one-dimensional optical lattice. By using non-Abelian density matrix renormalization group (DMRG) method we identify three possible phases: ferromagnetic, dimerized, and trimerized phases. We sketch the phase boundaries based on DMRG. We illustrate two methods for identifying the phases. The first method is based on the spin-spin correlation function while in the second method one observes the excitation gap as a dimerization or a trimerization superlattice is imposed. The advantage of the second method is that it can also be easily implemented in experiments. By using the scattering lengths in the literature we estimate that 83^{83}Rb, 23^{23}Na, and 87^{87}Rb be ferromagnetic, dimerized, and trimerized respectively.Comment: 4 pages, 3 figures. Add acknowledgemen

    Our Parents, Ourselves: Health Care for an Aging Population; A Report of the Dartmouth Atlas Project

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    The new Dartmouth Atlas, funded by The John A. Hartford Foundation, is a report card that analyzes Medicare data to show us where the United States is making progress in patient-centered, evidence-based care for Medicare beneficiaries and where improvement is still needed. It also offers insight into regional variations in care.Filling in the gaps in our knowledge about the state of care across the country will help health care providers, health systems, and patients and families work together to improve care for all older adults.This Dartmouth Atlas report looks at a number of measures from Medicare data, including:The number of days older adults spend in contact with the health care system;Use of high-risk medications;Cancer screening rates (and how they compare with recommendations);30-day hospital readmission rates;Annual Wellness Visit (AWV) rates;Late hospice referral; andThe number of days spent in intensive care.The report also offers a historical look at key practices, comparing data from 2003-05 and 2012

    Fluctuations of Entropy Production in Partially Masked Electric Circuits: Theoretical Analysis

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    In this work we perform theoretical analysis about a coupled RC circuit with constant driven currents. Starting from stochastic differential equations, where voltages are subject to thermal noises, we derive time-correlation functions, steady-state distributions and transition probabilities of the system. The validity of the fluctuation theorem (FT) is examined for scenarios with complete and incomplete descriptions.Comment: 4 pages, 1 figur

    Quantum Critical Spin-2 Chain with Emergent SU(3) Symmetry

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    We study the quantum critical phase of a SU(2) symmetric spin-2 chain obtained from spin-2 bosons in a one-dimensional lattice. We obtain the scaling of the entanglement entropy and finite-size energies by exact diagonalization and density-matrix renormalization group methods. From the numerical results of the energy spectrum, central charge, and scaling dimension we identify the conformal field theory describing the whole critical phase to be the SU(3)1_1 Wess-Zumino-Witten model. We find that while in the whole critical phase the Hamiltonian is only SU(2) invariant, there is an emergent SU(3) symmetry in the thermodynamic limit

    Second-harmonic generation in graded metallic films

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    We study the effective second-harmonic generation (SHG) susceptibility in graded metallic films by invoking the local field effects exactly, and further numerically demonstrate that the graded metallic films can serve as a novel optical material for producing a broad structure in both the linear and SHG response and an enhancement in the SHG signal.Comment: 10 pages, 2 EPS figures. Minor revision

    Complete Calabi-Yau metrics from Kahler metrics in D=4

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    In the present work the local form of certain Calabi-Yau metrics possessing a local Hamiltonian Killing vector is described in terms of a single non linear equation. The main assumptions are that the complex (3,0)(3,0)-form is of the form eikΨ~e^{ik}\widetilde{\Psi}, where Ψ~\widetilde{\Psi} is preserved by the Killing vector, and that the space of the orbits of the Killing vector is, for fixed value of the momentum map coordinate, a complex 4-manifold, in such a way that the complex structure of the 4-manifold is part of the complex structure of the complex 3-fold. The link with the solution generating techniques of [26]-[28] is made explicit and in particular an example with holonomy exactly SU(3) is found by use of the linearization of [26], which was found in the context of D6 branes wrapping a holomorphic 1-fold in a hyperkahler manifold. But the main improvement of the present method, unlike the ones presented in [26]-[28], does not rely in an initial hyperkahler structure. Additionally the complications when dealing with non linear operators over the curved hyperkahler space are avoided by use of this method.Comment: Version accepted for publication in Phys.Rev.

    Visualization of Coherent Destruction of Tunneling in an Optical Double Well System

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    We report on a direct visualization of coherent destruction of tunneling (CDT) of light waves in a double well system which provides an optical analog of quantum CDT as originally proposed by Grossmann, Dittrich, Jung, and Hanggi [Phys. Rev. Lett. {\bf 67}, 516 (1991)]. The driven double well, realized by two periodically-curved waveguides in an Er:Yb-doped glass, is designed so that spatial light propagation exactly mimics the coherent space-time dynamics of matter waves in a driven double-well potential governed by the Schr\"{o}dinger equation. The fluorescence of Er ions is exploited to image the spatial evolution of light in the two wells, clearly demonstrating suppression of light tunneling for special ratios between frequency and amplitude of the driving field.Comment: final versio
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