1,992 research outputs found

    Exploring the perspectives of a mixed case study approach for the evaluation of the EU Rural Development Policy 2007-2013

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    For the evaluation of the EU Rural Development Policy in the programming period 2007-2013, the European Commission has designed a Common Monitoring and Evaluation Framework (CMEF). Given a widespread lack of enthusiasm and the complexity of the CMEF, in this paper a comparative analysis of 22 evaluation methods of rural development policy is conducted in order to explore whether an alternative approach for the evaluation of the EU Rural Development Policy exists. The mixed case study approach is identified as potential alternative. This approach combines the analysis of data on input and output with in-depth interviews. First results of testing this method in the mid-term evaluation of the EU Rural Development Policy 2007-2009 in the Dutch NUTS2 region of Zeeland indicate that this approach might be a promising alternative to the CMEF. It is easier to implement and renders useful insight into the question why measures have been effective.Evaluation methods, EU Rural Development Policy, mixed case-study approach, Agricultural and Food Policy, R500, R580,

    Design Principles of The Regulation of Biological Networks

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    Comparative Interest Group Research

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    Topics in Markov Chain Theory and Simulation Optimisation

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    Heidergott, B.F. [Promotor

    Comparative Interest Group Research

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    Comparative Interest Group Research

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    Population Ecology of Interest Representation

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    Group Populations

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    Evolution of the bursting-layer wave during a Type 1 X-ray burst

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    In a popular scenario due to Heyl, quasi periodic oscillations (QPOs) which are seen during type 1 X-ray bursts are produced by giant travelling waves in neutron-star oceans. Piro and Bildsten have proposed that during the burst cooling the wave in the bursting layer may convert into a deep crustal interface wave, which would cut off the visible QPOs. This cut-off would help explain the magnitude of the QPO frequency drift, which is otherwise overpredicted by a factor of several in Heyl's scenario. In this paper, we study the coupling between the bursting layer and the deep ocean. The coupling turns out to be weak and only a small fraction of the surface-wave energy gets transferred to that of the crustal-interface wave during the burst. Thus the crustal-interface wave plays no dynamical role during the burst, and no early QPO cut-off should occur.Comment: 8 pages, submitted to MNRA

    Refractive elements for the measurement of the orbital angular momentum of a single photon

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    We have developed a mode transformer comprising two custom refractive optical elements which convert orbital angular momentum states into transverse momentum states. This transformation allows for an efficient measurement of the orbital angular momentum content of an input light beam. We characterise the channel capacity of the system for 50 input modes, giving a maximum value of 3.46 bits per photon. Using an electron multiplying CCD (EMCCD) camera with a laser source attenuated such that on average there is less than one photon present within the system per measurement period, we demonstrate that the elements are efficient for the use in single photon experiments
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