1,721,005 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Identification des signatures génétiques de la sélection chez le chien
No full textThe canine species is the oldest domesticated species about, 15,000 years ago, and today consists of more than 350 breeds resulting from a drastic artificial selection and inbreeding practices during centuries. My PhD thesis is dedicated to the study of the period dominated by natural selection during the evolution of canids and the recent period of breeds creation by intense artificial selection. We have identified the catalog of genes under positive selection in 10 species (dog, Human, marmoset, macaque, orangutan, chimpanzee, mouse, rat, horse and cow) from 10,730 genes in orthology relationship type 1: 1. The canine species has more genes under positive selection in common with Laurasatheria and rodents than the expected. We then identified the catalog of regions of allelic differentiation between dog breeds using genotype data of 170,000 SNPs in 456 dogs of 30 breeds, in collaboration with the team of Dr. Matthew Webster ( University of Uppsala, Sweden) as part of the European consortium of dog genetics named LUPA. These regions are candidates to be targets of the artificial selection. This project is continuing by the comparison of natural and artificial selection to determine whether there are regions of the genome that are constantly affected by the selection, and to determine whether the canine species may be considered as a reduced, but accelerated simulation of the mammals radiation.L'espèce canine est la plus ancienne espèce domestiquée, il y a environ 15.000 ans, et se compose aujourd'hui de plus de 350 races issues d'une sélection artificielle drastique et de croisements consanguins pratiqués durant les derniers siècles. Mon travail de thèse a pour objectif l'étude de la période dominée par la sélection naturelle au cours de l'évolution des canidés et la période récente de la création des races par une sélection artificielle intense. Nous avons identifié le catalogue des gènes sous sélection positive dans 10 espèces (chien, Homme, ouistiti, macaque, orang-outan, chimpanzé, souris, rat, cheval et vache) à partir de 10.730 gènes en relation d'orthologie de type 1:1. L'espèce canine présente plus de gènes sous sélection positive en commun avec les Laurasatheria et les rongeurs qu'à l'attendu. Nous avons ensuite identifié le catalogue des régions de différenciation alléliques entre races de chien à partir de données de génotypage de 170.000 SNPs de 456 chiens de 30 races, en collaboration avec l'équipe du Dr Matthew Webster (Université d'Uppsala en Suède) dans le cadre du consortium européen de génétique du chien LUPA. Ces régions sont candidates pour être les cibles de la sélection artificielle. Ce projet se poursuit actuellement afin de comparer les sélections naturelles et artificielles et de déterminer s'il existe des régions du génome qui sont constamment affectés par la sélection ; et de déterminer si l'espèce canine peut-elle être considérée comme une simulation réduite, mais accélérée de la radiation des mammifères
Variations on the Author
Get PDF“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
Get PDFWe 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
Get PDFWe 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
Identification des signatures génétiques de la sélection chez le chien
No full textL'espèce canine est la plus ancienne espèce domestiquée, il y a environ 15.000 ans, et se compose aujourd'hui de plus de 350 races issues d'une sélection artificielle drastique et de croisements consanguins pratiqués durant les derniers siècles. Mon travail de thèse a pour objectif l'étude de la période dominée par la sélection naturelle au cours de l'évolution des canidés et la période récente de la création des races par une sélection artificielle intense. Nous avons identifié le catalogue des gènes sous sélection positive dans 10 espèces (chien, Homme, ouistiti, macaque, orang-outan, chimpanzé, souris, rat, cheval et vache) à partir de 10.730 gènes en relation d'orthologie de type 1:1. L'espèce canine présente plus de gènes sous sélection positive en commun avec les Laurasatheria et les rongeurs qu'à l'attendu. Nous avons ensuite identifié le catalogue des régions de différenciation alléliques entre races de chien à partir de données de génotypage de 170.000 SNPs de 456 chiens de 30 races, en collaboration avec l'équipe du Dr Matthew Webster (Université d'Uppsala en Suède) dans le cadre du consortium européen de génétique du chien LUPA. Ces régions sont candidates pour être les cibles de la sélection artificielle. Ce projet se poursuit actuellement afin de comparer les sélections naturelles et artificielles et de déterminer s'il existe des régions du génome qui sont constamment affectés par la sélection ; et de déterminer si l'espèce canine peut-elle être considérée comme une simulation réduite, mais accélérée de la radiation des mammifères.The canine species is the oldest domesticated species about, 15,000 years ago, and today consists of more than 350 breeds resulting from a drastic artificial selection and inbreeding practices during centuries. My PhD thesis is dedicated to the study of the period dominated by natural selection during the evolution of canids and the recent period of breeds creation by intense artificial selection. We have identified the catalog of genes under positive selection in 10 species (dog, Human, marmoset, macaque, orangutan, chimpanzee, mouse, rat, horse and cow) from 10,730 genes in orthology relationship type 1: 1. The canine species has more genes under positive selection in common with Laurasatheria and rodents than the expected. We then identified the catalog of regions of allelic differentiation between dog breeds using genotype data of 170,000 SNPs in 456 dogs of 30 breeds, in collaboration with the team of Dr. Matthew Webster ( University of Uppsala, Sweden) as part of the European consortium of dog genetics named LUPA. These regions are candidates to be targets of the artificial selection. This project is continuing by the comparison of natural and artificial selection to determine whether there are regions of the genome that are constantly affected by the selection, and to determine whether the canine species may be considered as a reduced, but accelerated simulation of the mammals radiation.RENNES1-BU Sciences Philo (352382102) / SudocSudocFranceF
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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