1,721,352 research outputs found
Commentaire
No full textPetit Pascal. Commentaire. In: Revue d'économie financière, n°7, 1988. Articles divers. pp. 69-70
G. Allaire et R. Boyer (eds), La grande transformation de l'agriculture. Versailles, INRA Editions, Paris, Economica, 1995, 442 p.
No full textPetit Pascal. G. Allaire et R. Boyer (eds), La grande transformation de l'agriculture. Versailles, INRA Editions, Paris, Economica, 1995, 442 p.. In: Cahiers d'Economie et sociologie rurales, N°36, 3e trimestre 1995. pp. 129-131
Tertiarisation, croissance et emploi : quelles nouvelles logiques ?
No full textPetit Pascal. Tertiarisation, croissance et emploi : quelles nouvelles logiques ?. In: Revue d’économie industrielle, vol. 43, 1er trimestre 1988. Le dynamisme des services aux entreprises. pp. 164-178
« Politiques industrielles et impact sur l'emploi : les pays européens face à la contrainte extérieure »
No full textBoyer Robert, Petit Pascal. « Politiques industrielles et impact sur l'emploi : les pays européens face à la contrainte extérieure ». In: Revue d'économie industrielle, vol. 27, 1er trimestre 1984. L'Europe industrielle ? pp. 108-121
A new generation of evolutionary and seismic solar models
Full text linkThe Sun is the most observed star in the Universe. Thanks to this privileged status, it plays a key calibrator role for stellar physics, acting as a laboratory to test fundamental physical ingredients used in theoretical computations. Therefore, any refinement of the recipe of solar models will impact the ingredients for all models of solar-type stars. Following the revision of the solar abundances by Asplund and collaborators in 2005, confirmed in 2009, 2015 and 2021, the standard recipe of solar models has been put under question regarding both microscopic and macroscopic ingredients. In this work, we will present results of new generations of both solar evolutionary and seismic models. We will show how evolutionary models taking into account the effects of rotation and magnetic fields can reproduce both the internal rotation, the lithium surface abundance and the helium abundance in the convective zone of the Sun. Furthermore, we will present a new approach to compute seismic solar models from iterative Ledoux discriminant inversions. We will show how such seismic models can be used to gain insights on the temperature gradient close to the base of the convective zone, where the robustness of opacity tables has been questioned. Combining both approaches will thus provide us with key constraints on the required revision of physical ingredients to solve the long lasting solar modeling problem that followed the abundance revision in the early 2000s
Towards an evolutionary environmental regulation of capitalism : sustainable development 20 years after
Full text linkThe paper argues that by combining ecological economics, IPE and regulation approaches more closely, one may provide an account of the apparent contradiction between the utopian aspect of sustainable development and the ability of capitalism to pragmatically deal with ecological crises. It explores how ensuing institutional forms inevitably take sustainability claims into account. It assumes that such forms revolve around the emergence of a new type of evolutionary environmental regulation whose coherence is paradoxically at once open-ended, fragmented and hybrid. This feature clearly reinforces the extreme difficulty in thinking about ecological regularities. The paper analyses core elements of such institutional forms and how far they can be identified as a new type of fragmented evolutionary environmental regulation. Section 1 provides background on the notion of sustainable development. Sections 2 examines the prospects and limits of regulation theory on global ecological issues and presents lessons could be drawn from ecological economics and international political economy approaches for opening new routes to appraise current and future environmental concerns of capitalism. Section 3 explores the emerging form of evolutionary environmental regulation reflecting the apparently paradoxical situation we have reached, in which disillusion regarding sustainable development goes hand in hand with increasing awareness of the inescapability of a policy shift in its favour.SUSTAINABLE DEVELOPMENT
Ragnarök. The End of the Gods, by A. S. Byatt (2011). Translated by Laurence Petit & Pascal Bataillard as La fin des dieux. Paris: Flammarion, 199 pages
No full textRagnarök. The End of the Gods, by A. S. Byatt (2011). Translated by Laurence Petit & Pascal Bataillard as La fin des dieux. Paris: Flammarion, 2014, 199 page
Impact of MHD turbulence on the ionic composition of solar and stellar coronae
No full textSpectroscopic observations of the solar atmosphere reveal regions of the solar corona that are enriched in the abundance of heavy element with low-first ionisation potential (examples of low ‘FIP’ i.e. with <10 eV are Fe, Mg) relative to photospheric abundances. This enhancement in the abundance of low-FIP elements by a factor of three or four, called the ‘FIP effect’, is still not well understood. Moreover enriched abundances of low-FIP elements are also observed in the slow solar wind, which could give us more insights on its origins. An inverse-FIP effect corresponding to a decreased abundance of low-FIP elements has been measured in the atmosphere of M-type stars. Turbulent mixing of the chromosphere combined with the ponderomotive force caused by Alfvén waves propagating in these atmosphere could give a mechanism that might explain both the FIP and inverse FIP effect. Our goal is to study the role of magnetic topology and turbulence on this fractionation mechanism. In this work we use a MHD code to simulate wind profiles through which Alfvénic perturbations are propagated. We compare simulation outputs from two types of models, full MHD and a Shell model of Alfvén-wave turbulence
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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