20,901 research outputs found

    Colic and murmurs

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    Cardiology for dummies

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    Network

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    Network is a device for organising and conceptualising non-linear complexity. Networks defy narrative, chronology and thus also genealogy because they entail a multiplicity of traces. Networks problematize boundaries and centrality but intensify our ability to think in terms of flows and simultaneity. As a concept, network has been highly conducive to theorizing phenomena and processes such as globalization, digital media (Internet), speed, symbiosis and complexity. This in turn enables us to rethink what constitutes the foundations of intelligence, knowledge and even life itself. One particularly useful application of network as a concept is the notion of the gift, which is often seen as the archetypical figure for understanding the nature of economics and social relationships

    The Analytic Bootstrap in Fermionic CFTs

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    We apply the method of the large spin bootstrap to analyse fermionic conformal field theories with weakly broken higher spin symmetry. Through the study of correlators of composite operators, we find the anomalous dimensions and OPE coefficients in the Gross-Neveu model in d=2+εd=2+\varepsilon dimensions and the Gross-Neveu-Yukawa model in d=4εd=4-\varepsilon dimensions, based only on crossing symmetry. Furthermore a non-trivial solution in the d=2+εd=2+\varepsilon expansion is found for a fermionic theory in which the fundamental field is not part of the spectrum. The results are perturbative in ε\varepsilon and valid to all orders in the spin, reproducing known results for operator dimensions and providing some new results for operator dimensions and OPE coefficients.Comment: 42+3 pages, no figure

    Population, Space, and Human Culture

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    Putting the Diffuse Interstellar Bands on the map - literally!

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    In a quest to further our understanding of the diffuse interstellar medium (ISM) as well as the unidentified carriers of the diffuse interstellar bands (DIBs), we are mapping DIBs across the sky using hundreds of hot stars as background torches - globular clusters (in particular omega Centauri), nearby stars in and around the Local Bubble, and stars within the Magellanic Clouds. I describe the results so far obtained and our current experiments.Comment: Talk presented at IAU Symposium 297 "The Diffuse Interstellar Bands", CUP proceedings editors: Jan Cami and Nick Co
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