1,721,085 research outputs found
La nomination des instituteurs
No full textMariotti L. La nomination des instituteurs. In: La revue pédagogique, tome 2, Juillet-Décembre 1878. pp. 503-517
Studi sulla flora e vegetazione del Monte Pisano (Toscana nord-occidentale). IV. Nota preliminare sulle sfagnete di San Lorenzo a Vaccoli.
No full textLa supervisione del gruppo di osservazione e trattamento. Ricacciare i mali nel vaso di Pandora o riattraversarli?
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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
Reduced gibberellin biosynthesis and response in fruits of the auxin insensitive diageotropica tomato mutant
No full textAuxin has a central role in determining tomato fruit growth and development, and most of its action is mediated by gibberellins (GAs). The diageotropica (dgt) mutant of tomato exhibits many physiological responses that are related to a defective auxin sensitivity. In this paper we investigated the effects of the dgt mutation on tomato gibberellin biosynthesis regulation during fruit-set and early growth of pollinated fruits. In spite of an initial accumulation of active GAs in dgt ovaries, their content is significantly reduced at later stages. Indeed, at the beginning of rapid fruit growth, dgt fruits display a lower amount of GA(1) and its direct catabolite GA(8). Consistently, transcripts of GA 20-oxidase genes (GA20ox1, GA20ox2, GA20ox3) are low in the mutant. Moreover, low expression of genes encoding GA catabolism enzymes (GA 2 beta-hydroxylases) does not lead to an increase in the amount of active GAs, supporting the hypothesis that GA 20-oxidase genes downregulation might bottleneck the synthesis of active GAs in dgt. Interestingly, exogenous GA(3) application has little effect on dgt ovaries. GA(3)-treated fruits of the mutant are smaller than those of its wild type as a result of fewer and smaller pericarp cells. Consistently, GA(3) treatment in the dgt ovaries produces negligible effects on cell endoreduplication revealed by a lower nuclear DNA content in pericarp and locular tissue cells. The lack of DELLA-mediated constraint on GA signal in the double mutant dgt pro did not cause an increase in size and weight in pollinated fruits, suggesting that GA signalling is unable to overcome the inhibition of growth caused by the dgt mutation
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