2,636 research outputs found

    L\'{e}vy-based growth models

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    In the present paper, we give a condensed review, for the nonspecialist reader, of a new modelling framework for spatio-temporal processes, based on L\'{e}vy theory. We show the potential of the approach in stochastic geometry and spatial statistics by studying L\'{e}vy-based growth modelling of planar objects. The growth models considered are spatio-temporal stochastic processes on the circle. As a by product, flexible new models for space--time covariance functions on the circle are provided. An application of the L\'{e}vy-based growth models to tumour growth is discussed.Comment: Published in at http://dx.doi.org/10.3150/07-BEJ6130 the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm

    Comparison of geranylgeranyl and phytyl substituted methylquinols in the tocopherol synthesis of spinach chloroplasts

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    Geranylgeranyl substituted methylquinols are shown to be precursors of tocopherol biosynthesis in spinach chloroplasts as well as phytyl substituted ones. The geranylgeranyl substituted quinols are methylated even to a greater extent than the phytyl substituted ones. The connection to the so far known biosynthetic origin of -tocopherol is probably -tocotrienol which is hydrogenated to γ-tocopherol and then further methylated to -tocopherol

    The Capital Market as a Growth Engine

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    Internationaler Finanzmarkt, Wirtschaftswachstum, Markteffizienz, International financial market, Economic growth, Market efficiency

    Statistics of Extreme Still Water Levels - Between Policy and Objectivity

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    Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv

    Effects of Seasonal MSL Variability on Extreme Sea Levels in the German Bight

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    Source: ICHE Conference Archive - https://mdi-de.baw.de/icheArchiv
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