186,304 research outputs found
Neige et Glace de Montagne : Reconstitution, dynamique, pratiques
No full textCollection edytem n°8International audienceLes cahiers (de géographie, géologie et paléoenvironnement) de la Collection EDYTEM visent à faire connaître les recherches menées au sein du laboratoire EDYTEM ou de programmes dans lequel nous sommes impliqués. Si la priorité est la diffusion de nos travaux dans les revues majeures de nos communautés et les congrès internationaux, il nous paraît également important de mettre en avant la transversalité des recherches du laboratoire qui mobilise plusieurs champs disciplinaires autour de mêmes objets d'étude. Il est, en effet, difficile de mettre en avant cette dimension par le seul biais des publications dans des revues ou des communications qui répondent avant tout à des logiques disciplinaires. La Collection EDYTEM a cette mission : rendre visible la démarche interdisciplinaire du laboratoire autour d'entrées fédératrices : les systèmes hydrothermaux de montagne, les systèmes nivo-glaciaires et les systèmes karstiques. Trois entrées qui caractérisent les objets privilégiés d'étude du laboratoire. Après le numéro dédié à l'Aven d'Orgnac porté par " l'axe karst ", ce nouveau numéro illustre les recherches menées sur la haute montagne et les systèmes nivo-glaciaires. Le prochain numéro également prévu en 2009 traitera de l'hydrothermalisme de montagne. Soulignons que ces trois axes ont été mis en place il y a un peu plus de deux ans. Le fait que chacun d'entre eux produise en peu de temps des synthèses originales, reflète la rapide mobilisation des différents champs disciplinaires du laboratoire sur ces objets de recherche. Ce numéro " Neige et glace " illustre parfaitement cette dynamique. La participation très active des doctorants, comme contributeurs mais aussi animateurs des réunions de travail et de chantiers de recherche en est un bon exemple. Tout comme la structuration du numéro, qui aborde les reconstitutions paléoenvironnementales (de la dernière grande glaciation au Petit Âge Glaciaire), les dynamiques actuelles, à la fois reflets et indicateurs du changement climatique, et les incidences de ce changement sur le tourisme hivernal, les risques en montagne. Ces trois entrées illustrent les apports respectifs des trois équipes du laboratoire. Les 21 contributions originales de ce cahier reflètent la dynamique du laboratoire sur la montagne et les priorités mises à la fois sur les outils (laserscanning, métrologie, dendrochronologie, photogrammétrie, imagerie, modélisation...), les recherches doctorales (T. Barth, N. Cayla, S. Coutterand, P. Paccard, L. Ravanel et M. Le Roy) et l'accueil de chercheurs et de post-doct étrangers (S. Gruber, M. Kirkbride). Ce numéro a le mérite de poser clairement les recherches menées par le laboratoire sur la haute montagne, la neige et les glaciers et sa contribution dans les sciences de l'environnement
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Thermal conditions of rock slopes below unstable infrastructure in Alpine permafrost area : the cases of the Cosmiques hut and the Grands Montets cable-car station (Mont Blanc massif)
No full textPosterThermal state of steep permafrost-affected rock faces is crucial to assess the safety and reliability of mountain infrastructure as current permafrost degradation affects the rock slope stability. In the Mont-Blanc massif, 23 infrastructures are built on such a rock face with 13 of them that are characterized by a high risk of destabilization (Duvillard et al., 2015), including the upper station of the Grands Montets cable car (3325 m a.s.l.) as well as the Cosmiques hut (3613 m a.s.l.) on which we will focus. These two buildings have already been affected by different geomorphological processes. A rockfall event (600 m3) occurred for example on the SE face on the Arête inférieure des Cosmiques on the 21st of August 1998 (Ravanel et al., 2013) and the Grands Montets case shows a slow subsidence of the stairway over the last decade. In order to better assess the role of the permafrost in these processes and to gain insight on possible future geomorphic activity, we characterized the current permafrost conditions and simulated its changes up to the end of the 21st century using two complementary approaches: (i) the result of ERT (Electrical Resistivity Tomography) surveys carried out in October 2016 on the northern and southern faces right below the Cosmiques hut (at the level of the foundations) and at the Aiguilles des Grands Montets; (ii) the modeling of mean annual rock surface temperature for 2016 and at the end of the 21st century (Magnin et al., in rev.). Duvillard P.-A., Ravanel L., Deline P. (2015). Risk assessment of infrastructure destabilisation due to global warming in the high French Alps. Journal of Alpine Research, 103 (2). Magnin F., Josnin J.-Y., Ravanel L., Pergaud J., Pohl B., Deline P. (in rev.). Modelling rock wall permafrost degradation in the Mont Blanc massif from the LIA to the end of the 21st century. The Cryosphere Discuss.
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Dr. Edward P. Wimberly, ITC, July 2011
No full textThis video is a conversation with Dr. Edward P. Wimberly. Dr. Wimberly talks about his book, "No Shame in Wesley's Gospel: A Twenty-First Century Pastoral Gospel". Brad Ost, AUC Woodruff Library, is the interviewer
Author Rights and Scholarly Publishing
Get PDFOriginally posted at
http://blog.library.gsu.edu/2014/10/24/author-rights-and-scholarly-publishing/</p
Mapping the Discipline of the Olympic Games An Author-Cocitation Analysis
Get PDFThe authors conducted an author cocitation analysis on prominent authors writing about the Olympics during the 1990s. Author cocitation is an established bibliometric technique that can be used to measure the relative similarities of topics written about by the cited authors. This enables a visual representation of the “intellectual space” of the discipline, in this case the Olympics, to be created for the period under review. So core and peripheral research areas are identified, along with their major contributors. The representation appears as a two-dimensional cluster-enhanced map. Subject expertise was then applied to the results to place labels on the generated clusters of authors and their topics
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