1,720,988 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
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
Contribution a la mise au point d'une methode de transfert de genes par hybridation somatique asymetrique chez le melon (Cucumis melo L)
No full textSIGLEAvailable from INIST (FR), Document Supply Service, under shelf-number : TD 79351 / INIST-CNRS - Institut de l'Information Scientifique et TechniqueFRFranc
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
Flavonoid oxidation in Arabidopsis thaliana seeds (Functional analysis of the TRANSPARENT TESTA 10 gene encoding a polyphenoloxidase of the laccase type)
No full textL objectif de cette thèse était de réaliser une analyse fonctionnelle du gène TRANSPARENT TESTA 10 (TT10) codant une laccase (AtLAC15) impliquée dans l oxydation des flavonoïdes de la graine d Arabidopsis. Une partie de l étude était consacrée à l analyse des mécanismes de régulation contrôlant le pattern développemental d expression du gène TT10 dans les graines et les parties végétatives. Une dissection fonctionnelle en 5 d un promoteur de 2,0 kb réalisée à l aide du gène rapporteur uidA codant la -glucuronidase (GUS) a été réalisée pour identifier les régions responsables de l activation du promoteur dans les graines et les autres parties de la plante. Le promoteur de TT10 est activé exclusivement dans les téguments de la graine et les siliques. Une mutagénèse dirigée a été réalisée dans une région de 194 pb nécessaire à l expression dans les téguments, pour préciser la fonctionnalité des éléments régulateurs agissant en cis identifiés in silico. L expression du gène TT10 mesurée par qRT-PCR dans différents tissus et à différents stades de développement est en accord avec le pattern d activité du promoteur. Une variation naturelle pour l expression de TT10 a aussi été détectée parmi plusieurs accessions d Arabidopsis, avec des niveaux d ARNm mesurés chez Cvi, Ler et Sha fortement réduits par rapport à ceux relevés chez Ws, Col et Bay. L impact de ce polymorphisme moléculaire sur la composition en flavonoïdes de la graine, analysée sur graines matures par LC-MS, est discuté. TT10 est le seul membre de la famille des laccases à être exprimé fortement dans les graines.The purpose of this thesis was to perform a functional characterization of the TRANSPARENT TESTA 10 (TT10) gene encoding a laccase (AtLAC15) involved in flavonoid oxidation in Arabidopsis seed. A part of the work was devoted to the analysis of the regulatory mechanisms controlling the developmental pattern of TT10 gene expression in seeds and vegetative plant parts. The functional 5 -dissection of a 2.0-kb promoter realized with the uidA reporter gene encoding b-glucuronidase (GUS) was performed to identify regions responsibles for activation in seed and other plant organs. TT10 promoter happens to be activated exclusively in seed coat and siliques. Directed mutagenesis was undertaken to precise the regulatory role of in silico-detected cis-acting regulatory elements located in a 194-bp region necessary for expression in seed coat. TT10 gene expression assessed in different tissues at various stages of development using qRT-PCR matched promoter activity pattern. Natural variation for TT10 expression among Arabidopsis accessions was also detected, with the levels of TT10 mRNA in Cvi, Ler and Sha being strongly reduced compared to the ones in Ws, Col and Bay. The impact of this molecular polymorphism on seed flavonoid composition, as analyzed on mature seeds with LC-MS, is discussed. TT10 appeared to be the only member of the laccase gene family to be strongly expressed in seeds.ORSAY-PARIS 11-BU Sciences (914712101) / SudocSudocFranceF
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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