1,721,033 research outputs found
Gli Animali
No full textIl contributo illustra storia e caratteristiche bibliografiche dei testi antichi o di pregio di zoologia e biologia evolutiva di proprietà dell'Università di Ferrara con particolare riferimento alla selezione effettuata per la mostra Natura Naturata tenutasi presso la Biblioteca Chimico-biologica di Santa Maria delle Grazie, Via Fossato di Mortara 15/19 Ferrara dal 18 aprile al 1. maggio 2019
Preliminary investigations to possible introduction of Entomophaga maimaiga in Sardinia
No full textThe fungus Entomophaga maimaiga Humber, Shimazu and Soper (Entomophtorales: Entomophtoraceae) is a virulent and very host specific pathogen of the gypsy moth Lymantria dispar L., capable of causing epizootics also when the defoliator is at low population density. This fungus, originally described from the Asian gypsy moth, was introduced in the last decades of the 1900’s in the USA and Bulgaria where now it is well established causing high levels of mortality of gypsy moth larvae. The possible presence of E. maimaiga was recently investigated in Sardinia, Italy. The fungus is not present in the island so we decided (after obtaining the permit from the Ministero delle Politiche Agricole Alimentari e Forestali) to start bioassays to confirm its effectiveness against Sardinian larvae of L. dispar. Two methodologies were followed: 1) gypsy moth larvae were exposed to contaminated soil containing E. maimaiga azygospores; 2) larvae were sunk for three seconds in a water suspension containing E. maimaiga azygospores. The mortality caused by the fungus during our bioassays was 4.16% in 2012 and 3% in 2013 for the first method and 4.7% for the second method used only in 2013. We are currently verifying the action of the fungus against other lepidopteran larvae in order to avoid negative effects for the environment and lay foundations for the introduction of E. maimaiga in Sardinia
Il nucleo di sculture di Luigi de Luca del Museo e Real Bosco di Capodimonte
No full textIl testo costituisce un focus sul nucleo di sculture di Luigi de Luca (1855-1938) appartenente al Museo di Capodimonte di Napoli. Lo scultore, celebre alla sua epoca, ma celato, come tanti, dalla sfortuna critica del secolo scorso che ha coinvolto in generale la scultura ottocentesca italiana, è riemerso agli studi da un decennio attraverso esposizioni, saggi scientifici e approfondimenti di vario genere. In questa occasione sono state analizzate le sculture entrate nel museo napoletano tramite vari canali e in epoche differenti
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
Potential impact of Entomophaga maimaiga Humber, Shimazu, and Soper (Entomophthorales: Entomophthoraceae) on the lepidopteran fauna inhabiting cork forests in Sardinia (Italy)
No full textDifferent susceptibility of indigenous populations of Lymantria dispar to the exotic entomopathogen Entomophaga maimaiga
No full text
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
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