1,721,164 research outputs found
Méthodologies de délimitation des zones humides : de l'image satellitale à l'analyse terrain (Methodology of wetlands delimitation : from sensed data to field works)
No full textDelineate wetlands (marshes, ponds,...) with an aim of census and/or of follow-up induce the question of the methods and the tools the best adapted for a given observation scale. This article shows that it is necessary, within the framework of an encased step, to combine remotely sensed data, aerial photographs and ground data acquisition to apprehend these systems from a regional to a compartmental scale.Délimiter des zones humides (marécages, étangs,...) dans un but de recensement et/ou de suivi pose la question des méthodes et des outils les mieux adaptés pour une échelle d'observation donnée. Cet article montre qu'il est nécessaire, dans le cadre d'une démarche emboîtée, de combiner images satellitales, photographies aériennes et analyse de terrain pour appréhender ces milieux de l'échelle régionale à l'échelle parcellaire.Gramond Delphine, Savy Benoît, Graffouillère Matthieu, Bartout Pascal. Méthodologies de délimitation des zones humides : de l'image satellitale à l'analyse terrain (Methodology of wetlands delimitation : from sensed data to field works). In: Bulletin de l'Association de géographes français, 82e année, 2005-2 ( juin). Territoires ruraux centre-européens / Lacs, étangs et zones humides. pp. 246-255
The estonian limnic territories, a baltic originality?
Full text linkPlace of presence of the main European lakes by their surface, the Baltic limnic area cannot be summed up with its tens of lakes of continental extent because it shelters tens of thousands of lakes morainic, thermokarstic and other artificial water bodies. Through limnosystemic and limnoregional approaches, temporal, spatial and anthroposystemic dimensions, the author endeavors to frame the 5 articles present in this thematic sub-part and questions the Estonian limnic territories through the prism of their limnic footprint index
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
DE Varia
No full textCe numéro 46 « Varia » de Dynamiques Environnementales marque un tournant dans la politique éditoriale de la revue. En effet, il a été décidé de permettre à tous les chercheurs et toutes les chercheuses travaillant sur les questions environnementales et socio-environnementales de pouvoir soumettre leurs travaux tous les ans pour un numéro ouvert non thématique. Ce numéro propose huit articles scientifiques et un compte-rendu de lecture aux thématiques variées. Le monde tropical sera à l’honneur avec deux productions autour des problématiques forestières et agraires (article de Julien ANDRIEU et compte-rendu de lecture par Jean-Pierre DOUMENGE), ainsi qu’un article explorant les dynamiques des exportations de produits halieutiques au Sénégal (El Hadj Bara DEME et al.). Ces dynamiques socio-environnementales et stratégies d’acteurs se retrouveront dans deux autres productions, l’une dans le désert de Sechura au Pérou (Aurélien CHRISTOL et al.), l’autre en France métropolitaine (Anthony TCHEKEMIAN). L’hydrologie sera également à l’honneur avec la question hydrogéomorphologique (article de Faiza HALLOUZ et al. sur les concentrations de sédiments en suspension dans un oued du nord-ouest algérien), mais aussi une approche de l’hydrodiversité marine grâce à l’outil que sont les réserves de vagues (Grégoire TOURON-GARDIC et al.). Enfin, ce numéro 46 accueille en son sein deux approches originales sur le fond et la forme. Tout d’abord, une ouverture sur le fond avec le croisement thématique entre architecture et approche socio-environnementale à travers l’étude du chaume (Carole LEMANS et François FLEURY). Ensuite, une ouverture sur la forme, avec l’article réalisé par Laurent TOUCHART et al., à la fois hommage au chercheur russe Sergueï Gorchkov et plaidoyer pour sa vision géoécologique du monde qui nous entoure. This edition 46 "Varia" of Dynamiques Environnementales marks a turning point in the journal's editorial policy. Indeed, it has been decided to allow all researchers working on environmental and socio-environmental issues to submit their work every year for a non-thematic open issue. This edition offers eight scientific articles and one book review on various themes. The tropical world will be honored with two productions on forestry and agrarian issues (article by Julien ANDRIEU and book review by Jean-Pierre DOUMENGE), as well as an article exploring the dynamics of fisheries exports in Senegal (El Hadj Bara DEME et al.). These socio-environmental dynamics and actor strategies will be found in two other productions, one in the Sechura desert in Peru (Aurélien CHRISTOL et al.), the other in mainland France (Anthony TCHEKEMIAN). Hydrology will also be in the spotlight with the hydrogeomorphological question (article by Faiza HALLOUZ et al. on the concentrations of suspended sediments in a river of north-western Algeria), but also an approach to marine hydrodiversity thanks to the tool of wave reserves (Grégoire TOURON-GARDIC et al.). Finally, this 46th edition welcomes two original approaches on the content and the form. First, an opening on the content with the thematic crossing between architecture and socio-environmental approach through the study of thatch (Carole LEMANS and François FLEURY). Then, an opening on the form, with the article realized by Laurent TOUCHART et al. at the same time homage to the Russian researcher Sergueï Gorchkov and plea for his geoecological vision of the world which surrounds us
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
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