1,720,973 research outputs found
The family Olibrinidae in Italy (Malacostraca, Isopoda, Oniscidea)
Full text linkAmong the Oniscidea, the family Olibrinidae is still poorly known and was not yet recorded from Italy. The genus Castellanethes Brian, 1952, previously included in the family Trichoniscidae, is transferred to the family Olibrinidae, representing the first record of this family for Italy. Castellanethes sanfilippoi Brian, 1952 is redescribed from specimens collected in a cave in Apulia, Italy, close to the type locality. The genus Adoniscus Vandel, 1955 is considered to be a junior synonym of Castellanethes. Castellanethes soloisensis (Vandel, 1959) from Morocco is also figured. A diagnosis of the genus, key to species and distribution map are given
Faunistics and biogeography of terrestrial isopods (Crustacea, Oniscidea) from Liguria, north-western Italy.
No full textThe aim of this contribution is to illustrate the current state of knowledge of the Ligurian oniscidean fauna. Information from literature data and from material collected and examined in recent years are compared. Prior the start of our research in 2017, the total number of species recorded for Liguria was 73, belonging to 29 genera and 12 families. Most of these species were described or reported in a rather large number of papers on this topic published in the first half of the 20th century. From the ‘60s onwards, however, studies concerning terrestrial isopods from this region have considerably decreased, despite the large amount of undetermined material collected over the years and deposited in the scientific collections of several museums. The examination of both preserved and newly collected material has raised the number of species to 103, belonging to 38 genera and 17 families. Among these, it is worth to point out the presence of six species new to science, currently under description. Considering the limited territorial extension of Liguria (5,418 km2), 103 is a rather conspicuous number of species. For comparison, 78 species are recorded for Corsica (8,680 km2), 94 for Sardinia and surrounding islands (24,100 km2), 103 for Sicily and surrounding islands, including the Maltese Archipelago (26,148 km2), and 131 for Tuscany (22,943 km2). Moreover, as some areas or environments of the region have not been adequately investigated yet, such a sum is likely to increase. Such species richness, noticeable not only in terrestrial isopods, is probably due to the great environmental variability, the geographic position, and the geological context of Liguria, which is known to represent a significant biogeographic crossroad
Glossario delle pietre presenti nel Museo e nella città di Ravenna
No full textVengono presentati i materiali lapidei provenienti da tutto il bacino del Mediterraneo e utilizzati nella Ravenna romana e bizantina. Nel catalogo sono inseriti anche i materiali lapidei di provenienza italiana utilizzati nei secoli successivi, in particolare nell’età rinascimentale e barocca
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
- …
