1,721,305 research outputs found
Présentation de Marc Fontecave
No full textCher collègue, Cher Marc Fontecave, La cellule est une usine chimique capable de produire en permanence des molécules complexes à partir de réactifs élémentaires présents dans son environnement. On ne peut qu’être émerveillé devant sa performance, sa sélectivité et ses rendements. Émerveillé, certes, mais aussi désireux de comprendre et, si possible, de reproduire les mécanismes mis en jeu. Chimiste de formation, vous vous êtes particulièrement intéressé au rôle essentiel que jouent les métau..
Introducing Marc Fontecave
No full textDear colleague, Dear Marc Fontecave, The cell is a chemical plant capable of permanently producing complex molecules using basic reagents found in its environment. One can only marvel at its performance, its selectivity and its outcome. We do indeed marvel, but we also wish to understand and, if possible, reproduce the mechanisms involved. A chemist by training, you have taken a particular interest in the crucial role played by metals in the processes of cellular life. The structure or funct..
Chimie des processus biologiques
No full textMarc Fontecave, membre de l’Académie des sciences, membre du Conseil scientifique de la ville de Paris, médaille d’argent du CNRS a donné sa leçon inaugurale le 26 mars 2009. Son cours intitulé « La chimie du vivant : enzymes et métalloenzymes, des bio-catalyseurs fascinants » a commencé le 1er avril 2009
Revue de presse - mardi 28 avril 2020
No full textAprès la crise due au Covid-19, il n’y aura pas de transition énergétique et écologique sur un champ de ruines / Marc Fontecave, professeur au Collège de France, le Monde.fr, 28/04/2020 Accuser l’homme d’une pandémie qui montre la violence de la nature est « un effarant retournement idéologique », explique, dans une tribune au « Monde », Marc Fontecave, chimiste et professeur au Collège de France... lire La crise, une aubaine ? / Hugues de Jouvenel, rédacteur en chef Futuribles, les Echos..
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
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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