1,721,040 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
Progetto EUROCRAN: Interazione gene-ambiente nelle schisi orofacciali non-sindromiche
No full textLe schisi orofacciali (SOF) non-sindromiche, comprendenti le labiopalatoschisi (LPS) e le palatoschisi (PS), sono malformazioni congenite la cui eziologia si ritiene sia riconducibile complessa interazione tra fattori di rischio genetici e fattori di rischio ambientali.
Una ampia casistica multi-centrica, comprendente 1169 triadi composte da pazienti SOF e relativi genitori, è stata raccolta nel periodo 2001-2005 in 10 Paesi Europei nel contesto del workpackage-2 del progetto EUROCRAN, finalizzato allo studio dell’interazione gene-ambiente nelle SOF non-sindromiche.
L’analisi un pannello di varianti polimorfiche in geni candidati, comprendenti MTHFR, TGFA, TGFB3, SATB2, MSX1, CYP1A1, GST e NAT2, è stata condotta applicando l’analisi-log-lineare ed il TDT (transmission disequilibrium test).
Risultati preliminari evidenziano interazione gene-ambiente tra il genotipo MTHFR 677TT sia con la supplementazione in gravidanza con acido folico (FA) che con l’esposizione al fumo di tabacco. Nelle madri con supplementazione con AF il genotipo MTHFR 677TT si associa ad un effetto protettivo sia per LPS che e PS. In assenza di uso di tabacco durante la gravidanza, il genotipo materno MTHFR 677TT si accompagna a riduzione del rischio di LPS ma non di PS. Nei figli il genotipo MTHFR 677TT si associa a riduzione del rischio per SOF indipendentemente dalla supplementazione in gravidanza con AF o dalla non-esposizione al fumo di tabacco
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
EUROCRAN WP2
No full textA multi-centre gene-environment interaction study in orofacial clefting involving 1169 triads was carried out in 10 EU countries between 2001 and 2005. Genotyping was carried out successfully in Aberdeen, Dublin, Ferrara and Ljubljana for a range of genetic polymorphisms which included MTHFR TGFA TGFB3 SATB2 MSX1 CYP1A1 GST and NAT2. The Aberdeen centre completed a series of statistical analyses: informative case-parent triads were analysed by the transmission disequilibrium test and log-linear analysis was conducted for each of the polymorphisms, for all OFC combined, and for cleft lip and palate (CLP) and cleft palate only (CPO) separately. Among the results it was found that the MSX1 polymorphism conferred increased risk for CL(P) with maternal variant allele and a dominant effect (RR 1.34, p=0.05), but with CPO no effect was observed. All other results will be presented. In the future, additional genotyping for polymorphisms found to be significant in other populations, such as IRF6, FGFR1 and PVRL1 will be carried out
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
