1,721,007 research outputs found
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
Etat du film d'eau adsorbé par des montmorillonites. Application de la thermodynamique statistique à l'étude des phénomènes d'adsorption
No full textApplication of statistical mechanics to physical adsorption processes sometimes allows to ascertain the nature of the adsorbed film and therefore the nature of the surface. A study of the state equations, carried out for the case of Na and Ca montmorillonites, seems to prove the existence of two types of "sites".
The first type appears to be sites for localized adsorption of water, and may correspond to the region surrounding the cations which balance the lattice charges (1st hydration sphere of these cations) as well as to a part of the external surface (hydroxylic areas of fracture).
The second type, consisting of sites for delocalized adsorption, is represented by the remainder of the external surface and the interlamellar space ; the first type of sites covers an area of about 300 m2 g-1, whatever the nature of the cation.L'application de la mécanique statistique aux phénomènes d' adsorption physique permet dans certains cas de préciser la nature du film adsorbé et par voie de conséquence la nature de la surface. L'étude des équations d'état effectuée dans le cas des montmorillonites Na et Ca semble prouver l'existence de deux types de "sites" d'adsorption.
Le premier type serait le siège d'une adsorption localisée de l'eau et pourrait correspondre au domaine entourant les cations compensateurs des charges du réseau (1ère sphère d'hydratation de ces cations) ainsi qu'une partie de la surface externe (surfaces de fracture hydroxyliques).
Le deuxième type, siège d'une adsorption délocalisée est représenté par le reste de la surface externe et de l'espace interlamellaire ; le premier type de sites couvre une surface d'environ 300 m2g-1 indépendamment de la nature du cation.Jelli André, Poncelet G. Etat du film d'eau adsorbé par des montmorillonites. Application de la thermodynamique statistique à l'étude des phénomènes d'adsorption. In: Bulletin du Groupe français des argiles. Tome 17, nouvelle série n°12, 1966. pp. 39-51
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
Protons de constitution, protons libres et eau adsorbée
No full textCalvet R., Chaussidon Jean, Cloos P., de Kimpe C., Fripiat José Jean, Gastuche Marie-Claire, Helsen J., Jelli André, Léonard A., Poncelet G., Uytterhoeven J. Protons de constitution, protons libres et eau adsorbée. In: Bulletin du Groupe français des argiles. Tome 14, nouvelle série n°9, 1964. pp. 59-98
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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