1,720,980 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
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
Epigenetic and gene regulatory functions of small RNAs
Full text linkIn this review article, I summarize the intervention I made during the “Hommage à François Gros” held at the Institut Pasteur in Paris on the 25th of April, 2023. I discuss how the discovery of the existence of an RNA intermediate between genetic information and protein translation has changed our perspective on the role of RNA in gene regulation in these past years. I also discuss new emerging paradigms, highlighting the role of RNA in heritable information similar to the well-known DNA function
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Les petits ARN antisens aux gènes d’histones sont les déterminants épigénétiques de la stérilité chez les mutants piARN
No full textIl a été suggéré que les petits ARN non-codants sous-tendent les mécanismes de la transmission épigénétique transgénérationnelle. Cependant, les mécanismes actuels restent mal définis. Un exemple est le phénotype de perte de fertilité progressive, mais réversible, observé dans les populations isogéniques de C. elegans manquant d’ARNs interagissant avec PIWI (piARNs). Dans plusieurs modèles animaux, les mutations de la voie piARN entraînent la stérilité et, chez C. elegans, le phénotype est acquis lentement, sur plusieurs générations. Les piARNs de C. elegans n’inhibent pas directement l'expression de leurs cibles, mais déclenchent l'accumulation de petits ARN-22G antisens qui sont chargés par les protéines Argonaute spécifiques de C. elegans. Ceux-ci constituent les complexes effecteurs de la voie d’extinction induite par les piARN, inhibant les cibles complémentaires aux niveaux transcriptionnel et post-transcriptionnel.Non-coding RNAs have been proposed to underlie mechanisms of transgenerational epigenetic inheritance. However, the actual mechanisms remain poorly defined. An example of this is the progressive, yet reversible, loss of fertility phenotype observed in isogenic populations of C. elegans lacking PIWI-interacting RNAs (piRNAs). In several animal models, mutations in the piRNA pathway cause sterility, and in C. elegans the phenotype is acquired slowly over many generations. C. elegans piRNAs do not directly silence the expression of their targets, but trigger the accumulation of small single-stranded antisense 22G-RNAs which are loaded into Worm-specific Argonaute proteins. These constitute the effector complexes of the piRNA-induced silencing pathway, silencing complementary targets at the transcriptional and the post-transcriptional levels
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