60 research outputs found

    MicroRNA Related Polymorphisms and Breast Cancer Risk

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    The Physics of the B Factories

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    Structural damage diagnosis by Kalman model based on stochastic subspace identification

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    This paper presents an application of statistical process control techniques for damage diagnosis using vibration measurements. A Kalman model is constructed by performing a stochastic subspace identification to fit the measured response histories of the undamaged (reference) structure. It will not be able to reproduce the newly measured responses when damage occurs. The residual error of the prediction by the identified model with respect to the actual measurement of signals is defined as a damage-sensitive feature. The outlier statistics provides a quantitative indicator of damage. The advantage of the method is that model extraction is performed by using only the reference data and that no further modal identification is needed. On-line health monitoring of structures is therefore easily realized. When the structure consists of the assembly of several sub-structures, for which the dynamic interaction is weak, the damage may be located as the errors attain the maximum at the sensors instrumented in the damaged sub-structures

    REGIONAL CHANGE OF ICT USING INDUSTRIES IN THE NETHERLANDS

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    There are two classical and opposite perspectives on the effects of information and communication technology (ICT) on spatial economic development: dispersal or concentration. In this paper we analyse the dynamics in the spatial pattern of the ICT using industries in the period 1991-2002. We conclude that particularly the urban centres and the areas just outside of these centres had a loss of their share in the ICT-related employment and that the more rural areas are catching up. There is not a general dispersal of ICT-related employment over non-central areas though, but rather an emergence of new agglomeration areas at both the urban fringe and non-central locations within the urban system. ICT use as such does lead to spatial developments different from general spatial changes: not in general trends but particularly in a much larger magnitude of the dynamics. Copyright (c) 2005 by the Royal Dutch Geographical Society KNAG.
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