1,720,969 research outputs found
Le piante utilizzate nella medicina popolare dell'Ogliastra (Sardegna centro-orientale) per la cura delle patologie del sistema muscolo-scheletrico
No full textIn questo lavoro gli autori illustrano i risultati scaturiti da un’indagine
etnobotanica svolta in alcuni comuni dell’Ogliastra (Sardegna Centro-Orientale).
Attraverso le 482 interviste raccolte tra gli abitanti dei territori oggetto di indagine, e
da una successiva loro analisi qualitativa e quantitativa, è stato possibile individuare
un contingente di 52 specie ascrivibili a 49 generi e 36 famiglie utilizzate nella
risoluzione di disturbi riguardanti il sistema muscoloscheletrico
La flora della Codula di Sisine (Sardegna centro-orientale)
No full textCon questo contributo gli autori presentano i
risultati di una ricerca floristica svolta nelle formazioni calcaree
della Codula di Sisine (Sardegna centro-orientale). Il
contingente floristico rilevato è costituito da 314 specie suddivise
in 65 famiglie e 223 generi. Il contingente endemico è
rappresentato da 23 specie, 7,32% dell’intera flora. L’analisi
delle forme biologiche ha mostrato un’alta percentuale di
terofite ed emicriptofite; lo spettro corologico ha mostrato la
dominanza degli elementi mediterranei. La più alta percentuale
della componente endemica è riferita esclusivamente al
settore sardo
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
Ethanolic extract of Rubia peregrina L. (Rubiaceae) inhibits haloperidol-induced catalepsy and reserpine-induced orofacial dyskinesia
No full textIn the traditional Sardinian system of medicine, Rubia peregrina L. (Rubiaceae) is reported as an aphrodisiac herb. Since the aphrodisiacs may also have antioxidant and dopaminergic activities, the aim of this study was to study the effect of ethanolic extract of aerial parts of R. peregrina for the scavenging of free DPPH radicals and the inhibition of haloperidol-induced catalepsy in mice and reserpine-induced orofacial dyskinesia in rats. The extract exhibited significant antioxidant activity in a free radical DPPH assay with IC 50=55.6 μg mL -1, which was very close to IC 50 of ascorbic acid. The extract of R. peregrina (100 and 200 mg kg -1 intraperitoneally, i.p.) significantly inhibited haloperidol (1 mg kg -1 i.p.)-induced catalepsy in mice (p<0.01). In rats, the extract (200 mg kg -1 i.p.) significantly (p<0.01) inhibited the orofacial dyskinesia induced by intraperitoneal administration of reserpine (1 mg kg -1 on days 1, 3 and 5). This study demonstrates that R. peregrina has antioxidant activity and improves the dopaminergic function. Results therefore justify the development of further experiments to investigate the psychopharmacological profile of R. peregrina
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