1,721,012 research outputs found
Sans-Coma, V., Mas-Coma, S. & Gosalbez, J. — Mamiferos y Helmintos. Ketres Editora, Barcelona, 1987
No full textJourdane J, Fons Roger. Sans-Coma, V., Mas-Coma, S. & Gosalbez, J. — Mamiferos y Helmintos. Ketres Editora, Barcelona, 1987. In: Revue d'Écologie (La Terre et La Vie), tome 44, n°3, 1989. p. 296
L’impact du feu sur la végétation, les oiseaux et les micromammifères dans diverses formations méditerranéennes des Pyrénées-Orientales : premiers résultats
No full textA four year study of the impact of fire on different types of Mediterranean vegetation has been carried out in the Eastern part of the Pyrenean range (Département des Pyrénées-Orientales, France).
Following fire, a number of transient plant species colonize the open ground, while the original vegetation regenerates from stumps, rhizomes or buried seeds. This results in an increase in species richness of the vegetation at this stage.
The time necessary for the bird communities to reach their pre-fire species composition and population levels differs in Cork-oak and Holm-oak forests. This takes three years in the first case, but is much slower in the second vegetation type. Bird-species richness is higher in the burned maquis during the second and third years following the fire.
The population densities of small mammal species, particularly that of Apodemus sylvaticus, can be higher in all burned areas during the second and third post-fire years, but population structures (age and sex ratios) are different.
Changes in the physical structure of the above-ground vegetation following the fire is apparently the major factor influencing the bird community, whereas the small mammal community is more influenced by modification of the litter and the subsequent changes in food and shelter availability.Prodon Roger, Fons Roger, Peter Anne-Marie. L’impact du feu sur la végétation, les oiseaux et les micromammifères dans diverses formations méditerranéennes des Pyrénées-Orientales : premiers résultats. In: Revue d'Écologie (La Terre et La Vie), tome 39, n°2, 1984. pp. 129-158
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
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
Biologie évolutive des populations Ouest-Européennes de Crocidures. I. — Critères d’identification et répartition biogéographique de Crocidura russula (Hermann, 1780) et Crocidura suaveolens (Pallas 1811)
No full textUsing cytocaryologic and electrophoretic techniques, the authors were able to clarify the taxonomic status of a number of populations of three european species of shrews belonging to genus Crocidura.
They propose a set of reliable morphological criteria to allow the identification of Crocidura russula, C. leucodon and C. suaveolens (Figs 1 and 2). The present distribution of C. russula and C. suaveolens in Europe is critically reviewed, and shown on figures 3 and 4. — They also propose a new interpretation of the past history of the group, based on new subfossil material.L’emploi des techniques cytocaryologique et électrophorétique a permis de préciser le statut taxinomique encore controversé de populations des trois Crocidures européennes, de sélectionner des critères d’identification morphologiques sûrs et, sur la base de ces critères, de délimiter l’aire de répartition de Crocidura russula et de Crocidura suaveolens en Europe. Ces nouvelles données permettent de proposer un scénario cohérent de l’histoire des peuplements de Crocidures.Poitevin F., Catalan Josette, Fons Roger, Croset Henri. Biologie évolutive des populations Ouest-Européennes de Crocidures. I. — Critères d’identification et répartition biogéographique de Crocidura russula (Hermann, 1780) et Crocidura suaveolens (Pallas 1811). In: Revue d'Écologie (La Terre et La Vie), tome 41, n°4, 1986. pp. 299-314
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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