1,721,122 research outputs found
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
Nuove opportunità di impiego delle reti multifunzionali
No full textGrazie alle numerose potenzialità applicative (anti-insetto, antigrandine, regolazione della produzione, riduzione malattie fungine,
ecc.) le reti multifunzionali rappresentano una tecnica innovativa in grado di contrastare le nuove problematiche con cui le aziende frutticole si stanno confrontando. Tra queste, l’invasione di insetti alieni come la cimice asiatica, Halyomorpha haly
Comparison between different trap types for Drosophila suzukii in cherry orchards
No full textIn 2013 an experiment was carried out to compare six types of similar size traps baited with the same food attractant (“DroskiDrink”), differing for their shape and the number of entry holes. Four of the traps are already/will be soon available on the market, two of them being marketed specifically for SWD (“Drosotrap new®” and “Drosotrap®” by BIOBEST), and two being marketed for other pests (“Taptrap®” and “Vasotrap®” by Roberto Carello). The other two traps were specifically designed and hand-made on purpose (Kartell red and Bot). The trial was performed in a cherry orchard in Vignola (Modena Province, Northern Italy), area of IGP cherries; traps were placed according to a completely randomized block design and their position was changed weekly. The number of captured Drosophila suzukii (SWD) and that of other insect taxa was recorded weekly.
After the first year, results show that the traps with the best performance in terms of early season captures and total number of SWD catches were “Drosotrap new” and “Bot”. However, the low selectivity towards other insect types and the uneasiness of use suggest the need of further research to improve the efficacy of these traps
A task force to develop alternative strategies against emerging alien pests: Drosophila suzukii and Halyomorpha halys in Northern Italy.
No full textThe Spotted Wing Drosophila (SWD), Drosophila suzukii, and the Brown Marmorated Stink Bug (BMSB), Halyomorpha halys, are two polyphagous invasive pests native to east Asia, recently introduced in Northern Italy. SWD is a pest of soft-skinned fruits such as cherries and berries, whereas BMSB can attack many fruits, and horticultural and ornamentals crops. After their introduction, specific field monitoring campaigns were conducted and allowed to recognize that both pests have increasingly expanding distribution ranges and are seriously threatening cherry and other fruit orchards. Studies are being performed on the biology and potential for biological control by autochtonous antagonists in the newly invaded areas. For both targets, applied research projects are being performed, aimed at: a) the implementation of monitoring methods to improve capture efficiency and selectivity, together with damage identification and evaluation, and b) the development of sustainable management strategies based on behaviour manipulation, such as mass trapping, attract-and-kill, push-pull, pest exclusion (anti-insect nets) and verify the potential of autochtonous antagonists
Minimally invasive liver resection: has the time come to consider robotics a valid assistance?
No full textMinimally invasive liver resection (MILR) has been steadily increasing worldwide. Since its introduction in the early 1990s, initially adopted in cases of wedge and minor anatomical resection for benign hepatic lesions, MILR has been extended to major liver resection and for malignant hepatic lesions (1). Laparoscopic lateral sectionectomy has progressively become a standard operatio
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
Una scienza per la «felicità dei cittadini»: la traiettoria di Giovanni Vacchelli
No full textIl capitolo ricostruisce la traiettoria scientifica del giurista Giovanni Vacchelli all'interno delle "discipline amministrative" italiane, utilizzandola come spia per rilevare i rapporti di forza e le tensioni tra il diritto amministrativo e la scienza dell'amministrazione dagli anni Ottanta dell'Ottocento alla fine degli anni Trenta del Novecent
Una scienza per la «felicità dei cittadini»: la traiettoria di Giovanni Vacchelli
No full textIl capitolo ricostruisce la traiettoria scientifica del giurista Giovanni Vacchelli all'interno delle "discipline amministrative" italiane, utilizzandola come spia per rilevare i rapporti di forza e le tensioni tra il diritto amministrativo e la scienza dell'amministrazione dagli anni Ottanta dell'Ottocento alla fine degli anni Trenta del Novecent
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