892 research outputs found

    Discrete Solitons and Breathers with Dilute Bose-Einstein Condensates

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    We study the dynamical phase diagram of a dilute Bose-Einstein condensate (BEC) trapped in a periodic potential. The dynamics is governed by a discrete non-linear Schr\"odinger equation: intrinsically localized excitations, including discrete solitons and breathers, can be created even if the BEC's interatomic potential is repulsive. Furthermore, we analyze the Anderson-Kasevich experiment [Science 282, 1686 (1998)], pointing out that mean field effects lead to a coherent destruction of the interwell Bloch oscillations

    A Modern Natural Theology?

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    The author examines two different traditions of nineteenth-century natural theology and their reappearance in a modern work. Michael Denton\'s Nature\'s Destiny is used as an example of modern natural theology, showing how current writers attempt to resurrect the classical arguments of William Paley and William Whewell. The stance taken here is that, due to the heavily historical character of Foley\'s and Whewell\'s work, it is inappropriate to use their traditions uncritically as windows into religious understandings of science

    <Personal>Obituary

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    This Annual Report covers from 1 January to 31 December 202

    Henry Wellington: A Restaurant - Brunch

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    Brunch menu. Creative menu design. Very humorous and creative menu. Geographical location: 216 1st Avenue SW, Rochester, Minnesota

    “Tall oaks fallen”: Three Pioneers of Chromosome Science

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    “As when, upon a tranced summer-night

    Ending Jim Crow Life Insurance Rates

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    his Article tells the story of the rise and fall of explicit race-based pricing practices as American life insurance companies responded to changes in the social, economic, and legal status of former slaves. The role of law in that story, from the Civil War to the beginning of this century, illustrates the complex interaction between civil rights reform and private commercial markets. Despite early laws prohibiting race-based life insurance rates, racial discrimination persisted in various forms for over a century due to the strength of the underlying racial ideologies, the rhetorical power of actuarial language, and the structure and regulation of insurance markets. Life insurance companies reinforced prevailing American assumptions about race by adopting explicit race-based pricing categories after Reconstruction, and later, by prospectively abandoning them beginning after World War II. Earlier this century, regulatory investigations and litigation under post-Civil War federal civil rights statutes brought relief to those harmed by the continuing effects of dual rate structures in race-segmented markets. Civil rights law thus served primarily as prologue, by provoking company adaptation, and as epilogue, by providing retrospective relief, to the central story of that transformation
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