1,721,175 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
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
La Vitis Sylvestris
Full text linkLa vite selvatica cresce spesso lungo
i corsi d’acqua aggrappandosi ad
alberi che, periodicamente, vengono
tagliati, o peggio lungo fossi costantemente
ripuliti, mettendo in serio pericolo
la sua secolare sopravvivenza.
Il nostro Dipartimento, consapevole
dell'importanza scientifica che questa
pianta riveste, ha intrapreso una ricerca
per la salvaguardia e lo studio ampelografico,
molecolare e filogenetico
delle viti selvatiche presenti in Maremma
toscana.
Si è proceduto all'individuazione
e alla catalogazione di viti selvatiche
rinvenute in diversi habitat delle province
di Siena e Grosseto (A, B) individuando
oltre 150 accessioni di cui
una settantina poste in collezione utilizzando
uno specifico sistema di allevamento
(Totem (C)) presso l'azienda
ColleMassari s.p.a. sulle quali vengono
condotte osservazioni ampelografiche
qualitative e molecolari (microsatelliti
nucleari e cloroplastici). Da questa indagine sono emersi
genotipi molto simili provenienti dalla
medesima popolazione, ma anche
genotipi piuttosto diversi indipendentemente
dalla zona di provenienza.
È inoltre stata rilevata la presenza di
accessioni riconducibili a sative inselvatichite
oppure ibridi naturali tra V.v.
subsp. sativa e V.v. subsp. sylvestris.
Dall’analisi dei microsatelliti cloroplastici
è emerso che le accessioni analizzate
si identificano esclusivamente nei
clorotipi A e D: il primo molto frequente
nei presunti centri di origine secondaria
dell’Europa Occidentale,il secondo predomina nei centri di origine
dell’Europa Orientale. Il materiale reperito presenta ampia
variabilità morfologica e genetica, oltre
a profili antocianici delle uve a bacca
nera assai peculiari. L’analisi dei microsatelliti
nucleari ha mostrato che
alcune presunte accessioni di Vitis vinifera
subsp. sylvestris recuperate in Toscana
sembrano derivare da vitigni già
coltivati e inselvatichiti, mentre altre
sarebbero incroci intraspecifici sativasylvestris.
Il reperimento di V.v. sylvestris
continua con l’ampliamento del
numero dei siti, mentre proseguono gli
studi ampelografici e sul profilo antocianico
delle uve a bacca nera nonché
l’ulteriore genotipizzazione mediant
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Virtù e paideia nella filosofia romana
No full textAll’insegna di un progressivo allontanamento dalle costruzioni teoriche di Platone e di Aristotele diviene centrale, per il cittadino e soprattutto per il filosofo romano, l’esperienza diretta del reale. In ciò si configura quella che possiamo definire una vera e propria «arte del vivere». Con l’intenzione di mostrare si intende sollecitare la riflessione in quattro direzioni, facendo leva sul concetto di virtus: vale a dire su quello che, a Roma, diviene lo strumento per eccellenza nella prassi della “condotta di vita filosofica”
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