9,862 research outputs found

    'My Father’s Daughter': Filial Dislocation in Shirley Geok-lin Lim’s Poetry

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    Drawing on the father figure and the father–daughter dynamic in Shirley Geok-lin Lim’s poetry, this article examines how the motif of filial dislocation underlines ambivalent and complicated emotions and meanings that can be traced back to the poet’s traumatic childhood experience of her father’s violence. This experience, described here as one of acute psychical and emotional rupture and dislocation, has been imprinted onto Lim’s body and consciousness in the form of embodied memories and emotions, and reenacted in writing and poetic articulation where the father figure is concerned. Through the recurring themes of memory, (dis)connection, distance, and dislocation, Lim’s deeply personal, even autobiographical, poems explore the wounded father–daughter relationship; in so doing, they trouble the ideological premise of filial piety as a cultural concept, which upholds the child’s obligation to the parent through the performance of filial care, respect, and obedience. At the same time, Lim’s poems reflect how embodied memories and emotions are relived and refelt in the process of writing as well as the depth of the poet’s emotional response and subjective interiority in the articulation and performance of filial and gender identity. Weaving through and traversing interior and exterior spaces and landscapes of memory and imagination, body and geography, the poems illuminate complex psychological, emotional, and embodied dimensions of Lim’s mediation of her filial and gender identity as a feminist poet, a daughter, and a gendered individual

    Ultracold molecules: new probes on the variation of fundamental constants

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    Ultracold molecules offer brand new opportunities to probe the variation of fundamental constants with unprecedented sensitivity. This paper summarizes theoretical background and current constraints on the variation of fine structure constant and electron-to-proton mass ratio, as well as proposals and experimental efforts to measure the variations based on ultracold molecules. In particular, we describe two novel spectroscopic schemes on ultracold molecules which have greatly enhanced sensitivity to fundamental constants: resonant scattering near Feshbach resonances and spectroscopy on close-lying energy levels of ultracold molecules

    Enhancement of variation of fundamental constants in ultracold atom and molecule systems near Feshbach resonances

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    Scattering length, which can be measured in Bose-Einstein condensate and Feshbach molecule experiments, is extremely sensitive to the variation of fundamental constants, in particular, the electron-to-proton mass ratio (m_e/m_p or m_e/Lambda_{QCD}, where Lambda_{QCD} is the QCD scale). Based on single- and two-channel scattering model, we show how the variation of the mass ratio propagates to the scattering length. Our results suggest that variation of m_e/m_p on the level of 10^{-11}~10^{-14} can be detected near a narrow magnetic or an optical Feshbach resonance by monitoring the scattering length on the 1% level. Derived formulae may also be used to estimate the isotopic shift of the scattering length

    Large-scale lattice Boltzmann simulations of complex fluids: advances through the advent of computational grids

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    During the last two years the RealityGrid project has allowed us to be one of the few scientific groups involved in the development of computational grids. Since smoothly working production grids are not yet available, we have been able to substantially influence the direction of software development and grid deployment within the project. In this paper we review our results from large scale three-dimensional lattice Boltzmann simulations performed over the last two years. We describe how the proactive use of computational steering and advanced job migration and visualization techniques enabled us to do our scientific work more efficiently. The projects reported on in this paper are studies of complex fluid flows under shear or in porous media, as well as large-scale parameter searches, and studies of the self-organisation of liquid cubic mesophases. Movies are available at http://www.ica1.uni-stuttgart.de/~jens/pub/05/05-PhilTransReview.htmlComment: 18 pages, 9 figures, 4 movies available, accepted for publication in Phil. Trans. R. Soc. London Series

    The Asymmetric Avalanche Process

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    An asymmetric stochastic process describing the avalanche dynamics on a ring is proposed. A general kinetic equation which incorporates the exclusion and avalanche processes is considered. The Bethe ansatz method is used to calculate the generating function for the total distance covered by all particles. It gives the average velocity of particles which exhibits a phase transition from an intermittent to continuous flow. We calculated also higher cumulants and the large deviation function for the particle flow. The latter has the universal form obtained earlier for the asymmetric exclusion process and conjectured to be common for all models of the Kardar-Parisi-Zhang universality class .Comment: 33 pages, 3 figures, revised versio

    GEODYN system description, volume 1

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    A computer program for the estimation of orbit and geodetic parameters is presented. The areas in which the program is operational are defined. The specific uses of the program are given as: (1) determination of definitive orbits, (2) tracking instrument calibration, (3) satellite operational predictions, and (4) geodetic parameter estimation. The relationship between the various elements in the solution of the orbit and geodetic parameter estimation problem is analyzed. The solution of the problems corresponds to the orbit generation mode in the first case and to the data reduction mode in the second case
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