1,721,047 research outputs found
Suivi et état de santé 2007 des récifs coralliens de Mayotte
No full textMonitoring and health state 2007 of coral reefs of Mayotte Island.— The principal characteristics of Mayotte Island are the length of the reef-barriers delimiting one of the widest lagoon of the area, a double reef-barrier (uncommon geological structure) as well as a general dynamics being equivalent to that of a series of eight reef-lagoon complex being able to function independently. Specifi cities of the environmental parameters combined with the particular characteristics generate a singular dynamics of the ecosystem and addicted communities. The objective of the Observatory of the Coral Reefs of Mayotte is to ensure, on the long term, the acquisition of reference data on the coral ecosystems of the island in order to evaluate the spatio-temporal evolution of the benthic and ichtyologic communities, this associated with more specifi c objectives (will ciguatera, whitening, SIG, coordination and management). To succeed in doing that, regular surveys are carried out (station of reference ORC, fringing reef, Reef Check), associated with specifi c studies and initial states. More than 9 years after the phenomenon of massive whitening, the results of the ORC show a continuous and encouraging evolution of the coral growth. However, the dynamics of substrate recolonization by new individuals varies according to the three types of reefs present.Les principales caractéristiques de Mayotte sont la longueur des récifs barrière délimitant un des plus larges lagon de la région, une double barrière récifale (structure géomorphologique rare) ainsi qu’une dynamique générale équivalant à celle d’une série de huit complexes récifo-lagonaires pouvant fonctionner indépendamment. Les spécifi cités des paramètres environnementaux combinées aux caractéristiques propres engendrent une dynamique singulière des milieux et des peuplements inféodés. L’objectif de l’Observatoire des Récifs Coralliens (ORC) de Mayotte est d’assurer, sur le long terme, l’acquisition de données de référence sur les écosystèmes coralliens afin d’évaluer l’évolution spatio-temporelle des peuplements benthiques et ichtyologiques, ceci associé à des objectifs plus spécifiques (ciguatéra, blanchissement, SIG, coordination et gestion). Pour y parvenir des suivis réguliers sont effectués (station de référence ORC, récif frangeant, Reef Check), associés à des études ponctuelles et des états initiaux. Plus de 9 ans après le phénomène de blanchissement massif, les résultats de l’ORC montrent une évolution continue et encourageante de la croissance corallienne. Cependant la dynamique de recolonisation du substrat par de nouveaux individus varie suivant les trois types de récifs présents.Dinhut Vincent, Nicet Jean-Benoît, Quod Jean-Pascal. Suivi et état de santé 2007 des récifs coralliens de Mayotte. In: Revue d'Écologie (La Terre et La Vie), tome 63, n°1-2, 2008. Les récifs coralliens de l’outre - mer français : suivi et état des lieux / French overseas coral reefs: monitoring and status / Los arrecifes de coral del ultramar francés: seguimiento y estatuto. pp. 103-114
Etude pharmacologique du principe actif majeur de la ciguatera : la ciguatoxine
No full textSIGLECNRS T Bordereau / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc
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
Variations on the Author
Get PDF“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
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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