4,303 research outputs found

    A primer on innovation and growth

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    Philippe Aghion emphasises that for Europe to stimulate innovation and growth, it is not enough to increase spending on research and development and the protection of intellectual property.

    Histoire de la Deuxième Guerre Mondiale (1992-1997) (09). Philippe Burrin (1) - face B

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    Séminaire organisé et enregistré par l'IHTP (Paris), entre 1992 et 1997 ; sous la direction de Jean-Pierre Azéma et Dominique Veillon. Communication de Philippe Burrin

    Histoire de la Deuxième Guerre Mondiale (1992-1997) (09). Philippe Burrin (1) - face A

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    Séminaire organisé et enregistré par l'IHTP (Paris), entre 1992 et 1997 ; sous la direction de Jean-Pierre Azéma et Dominique Veillon. Communication de Philippe Burrin

    Histoire de la Deuxième Guerre Mondiale (1992-1997) (10). Philippe Burrin (2) - face B

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    Séminaire organisé et enregistré par l'IHTP (Paris), entre 1992 et 1997 ; sous la direction de Jean-Pierre Azéma et Dominique Veillon. Communication de Philippe Burrin (suite)

    Histoire de la Deuxième Guerre Mondiale (1992-1997) (10). Philippe Burrin (2) - face A

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    Séminaire organisé et enregistré par l'IHTP (Paris), entre 1992 et 1997 ; sous la direction de Jean-Pierre Azéma et Dominique Veillon. Communication de Philippe Burrin (suite)

    A Primer on Innovation and Growth. Bruegel policy brief 2006/06, October 2006

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    Summary. In sharp contrast with the post-war period, over the last 10 years income per head in the EU has begun to decline in comparison to that of the US. Against this background, the revival of growth and productivity has become an overriding priority of European policymakers. While fostering innovation has become a necessity in Europe, R&D investments alone will not do the job

    Plant-soil feedback in the ‘real world’: how does fire fit into all of this?

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    Aims: Plant–soil feedback (PSF) is an important mechanism controlling plant growth, vegetation dynamics, and longer-term and larger-scale patterns of plant community diversity. We know that feedback between plants and soil biota depends on several external factors, such as nutrient and water availability, and interactions with neighbouring plants. We argue that in the ‘real world’, PSF are not working in isolation but instead proceed within a complex context of multiple interacting factors. Fire is one of those complex external factors which could greatly alter PSF by re-setting or re-directing plant-soil biota interactions. Methods: We reviewed key literature on the effects of fire on soil biota and soil physicochemical properties with soil depth, to generate predictions on the complex effects of fire on PSF. Results: We highlight that fire has strong potential to directly and indirectly affect the strength of PSF. To what extent this influences longer-term plant community trajectories depends on the interactions between fire characteristics and ecosystem type. Here, we conceptualized these effects of fire on soil properties and biota, and then discuss the main pathways through which fire should alter PSF. Conclusions: We think that PSF processes should be nullified under and after fire. Average neutral PSF responses are expected to be more common in the short-term or within the timeframe required for major soil microbial players to regain their pre-fire abundances and diversity. We conclude by providing directions for future research and possible methods to study fire effects on PSF both in the field and under controlled conditions.EEA San LuisFil: Kardol, P. Swedish University of Agricultural Sciences. Department of Forest Ecology and Management; SueciaFil: Yang, T. Agriculture and Agri-Food Canada. Swift Current Research & Development Centre; CanadáFil: Arroyo, Daniel Nicolas. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria San Luis; ArgentinaFil: Teste, Francois Philippe. Agriculture and Agri-Food Canada. Swift Current Research & Development Centre; CanadáFil: Teste, Francois Philippe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Matemática Aplicada de San Luis; ArgentinaFil: Teste, Francois Philippe. Universidad Nacional de San Luis. Facultad de Ciencias Físico, Matemáticas y Naturales. Instituto de Matemática Aplicada de San Luis; Argentin

    « The author writes like a Briton ». La réception de Balzac en Angleterre

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    Salazar Philippe-Joseph. « The author writes like a Briton ». La réception de Balzac en Angleterre. In: Littératures classiques, n°33, printemps 1998. Fortunes de Guez de Balzac. pp. 247-262
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