1,721,036 research outputs found
Manuale di Malacologia dell'Alto Jonio
No full textGuida all'identificazione e classificazione di Molluschi conchiferi dell'alto JonioQuesto testo si rivolge ad un pubblico vario, dal semplice collezionista conchigliologo all’esperto malacologo che intende approfondire le conoscenze sulle specie dell’Alto Jonio. È per questo che si pone come versatile strumento d’indagine, soprattutto per i laboratori universitari, dove lo studente, ricco delle nozioni di zoologia, ma povero d’esperienza specifica nel campo malacologico, trova delineato un cammino che lo
porterà dai primi rudimenti tassonomici alla scoperta delle specie più criptiche. La sezione tassonomica si avvale di disegni schematici, chiavi d’identificazione e fotografie non solo degli individui adulti ma anche di quelli giovanili
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
Phenology and Fruit Growth Dynamics of Mango (Mangifera indica L.) in Greenhouse and Open Air in Mediterranean Climate
Full text linkPhenological evolution of shoots and fruit growth of three mango varieties—Keitt, Osteen and Tommy Atkins—were monitored during two reproductive seasons, from full flowering to fruit harvest on trees cultivated in the open air and inside a greenhouse, in the island of Sicily—Italy. The aim of the study was to assess the behavior of mango trees subjected to summer high temperatures under a permanent plastic cover in the Mediterranean climate. Differences between open air and greenhouse emerged in the dates of first record of major phenological stages and in their duration, and in the fruit growth rates. Greenhouse cultivated trees showed a significant anticipation of flowering and ripening of the fruits respect to open air trees, with harvest conducted earlier during the season. On the other hand, open air cultivated trees achieved fruit maturity in a shorter time compared to the greenhouse, with fruits needing between 90 and 110 days after full flowering to reach their final dimensions—while the trees in the greenhouse needed at least 125 days. The study allowed to understand the growth dynamics of mango fruits subjected to extreme high temperatures and provides new information to evaluate the opportunity of greenhouse cultivation of mango in the Mediterranean climate
Polyphenol composition and qualitative characteristics of fresh-cut lettuce in relation to cultivar, mulching and storage.
No full textMolluscs on subtidal cliffs: patterns of spatial distribution
No full textThe distribution of molluscan assemblages across and along a vertical rocky cli¡ near Otranto (southern
Adriatic Sea, Italy) was studied. Sampling was undertaken in May and November 2000 at three sites
approximately 100m apart. Three depths (5, 15, 25m) were sampled at each site, by scraping o¡ three
replicate 2020 cm quadrats. Samples yielded 6722 specimens, referred to as 133 species. Multivariate
analyses showed that the structure of the assemblages signi¢cantly di¡ered among depths with a clear
gradient of distribution from shallow to deep stands. However, a considerable variation in the structure of
the assemblage was also observed among sites at each of the three depths. The species contributing most to
characterize depths and/or di¡erentiating sites at each level of the shore were identi¢ed. Some potential
causes of the observed di¡erences are discussed
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