457 research outputs found

    Hot issues on the M&E agenda

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    This report summarises the discussions and presentations of the Expert Seminar ‘Hot Issues on the M&E Agenda’, which took place in Wageningen on March 23, 2012. The Expert Seminar was organised by the Wageningen UR Centre for Development Innovation in collaboration with Learning by Design and Context, international cooperation. The report describes the hot issues on the M&E agenda, divided into a global top 10 of hot issues, the politics of evaluation, the battle field of rigour, and the future of evaluative practice

    Conference Report: Measuring what matters in a ‘post-truth’ society : A conference on how to measure what matters, and use what matters, in order to change what should matter?

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    This report presents the key highlights and contributions from the conference ‘Measuring what matters in a ‘post-truth’ society’. This conference was held on the 6th of April 2017 in Wageningen, the Netherlands. This conference was the 10th annual ‘M&E on the Cutting Edge’ conference. These events are organised by Wageningen University & Research, Wageningen Centre for Development Innovation (CDI) in collaboration with partners, in this case Oxfam GB. The conference focused on understanding how we measure what matters, and use what matters, to change what should matter, in an era of post-truth, whilst aiming towards social inclusion and global development

    Developmental evaluation : applying complexity concepts to enhance innovation and use

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    This report summarises the discussions and presentations of the Expert Seminar ‘Developmental Evaluation’, which took place in Wageningen on March 22, 2012. The Expert Seminar was organised by the Wageningen UR Centre for Development Innovation in collaboration with Learning by Design and Context, international cooperation

    Double Exchange Alone Does Not Explain the Resistivity of La1−xSrxMnO3La_{1-x} Sr_x MnO_3

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    The La1−xSrxMnO3La_{1-x} Sr_x MnO_3 system with 0.2≲x≲0.40.2 \lesssim x \lesssim 0.4 has traditionally been modelled with a ``double exchange'' Hamiltonian, in which it is assumed that the only relevant physics is the tendency of carrier hopping to line up neighboring spins. We present a solution of the double exchange model, show it is incompatible with many aspects of the resistivity data, and propose that a strong electron-phonon interaction arising from a Jahn-Teller splitting of the outer Mn d-level plays a crucial role.Comment: Figure available via concentional mail. Contact [email protected]

    Improving the Use of Monitoring & Evaluation Processes and Findings : Conference report

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    This report summarises discussions and presentations of the Conference ‘Improving the Use of Monitoring & Evaluation Processes and Findings’, which took place on March 20 and 21, 2014. This conference is part of our series of yearly ‘M&E on the cutting edge’ events. This conference particularly looked at under what conditions the use of M&E processes and findings can be improved. Report CDI-14-01

    Topological Phase Diagram of a Two-Subband Electron System

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    We present a phase diagram for a two-dimensional electron system with two populated subbands. Using a gated GaAs/AlGaAs single quantum well, we have mapped out the phases of various quantum Hall states in the density-magnetic filed plane. The experimental phase diagram shows a very different topology from the conventional Landau fan diagram. We find regions of negative differential Hall resistance which are interpreted as preliminary evidence of the long sought reentrant quantum Hall transitions. We discuss the origins of the anomalous topology and the negative differential Hall resistance in terms of the Landau level and subband mixing.Comment: 4 pages, 4 figure

    Franck-Condon-Broadened Angle-Resolved Photoemission Spectra Predicted in LaMnO3

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    The sudden photohole of least energy created in the photoemission process is a vibrationally excited state of a small polaron. Therefore the photoemission spectrum in LaMnO3 is predicted to have multiple Franck-Condon vibrational sidebands. This generates an intrinsic line broadening approximately 0.5 eV. The photoemission spectral function has two peaks whose central energies disperse with band width approximately 1.2 eV. Signatures of these phenomena are predicted to appear in angle-resolved photoemission spectra.Comment: Revtex file 4 pages and 3 figure
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