1,721,023 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
Genomic DNA sequencing from a bulk segregant experiment to map the genetic determinants of natural bracts variation in Arabidopsis thaliana
No full textPaired-end Illumina sequences of genomic DNA used to map the genetic variant responsible for bract development in the wild-type accession Tsu-0 of the model plant Arabidopsis thaliana.
Bract presence was quantified by a bract score. Crosses in both directions were done between the wild accession Tsu-0 (obtained from Versailles Arabidopsis Stock center -VASC- , stock 91AV) showing a high bract score and the reference accession Col-0 (VASC stock 186AV) displaying a low bract score. Two bulks of F2 plants were selected, with a high (Tsu-0 like) and low (Col-0 like) bract score, respectively. Genomic DNA of each plants of the bulks was extracted and mixed in equal quantities.
The four samples therefore correspond to genomic DNA of the two parents (Tsu-0 and Col-0) and of the two bulks (low and high bract score).
DNA concentrations: Col-0 = 25,6ng/µl (a few plants) ; Tsu-0 (a few plants) = 15,5ng/µl, high bract score F2 bulk (17 plants): 13,2ng/µl ; low bract score F2 bulk (56 plants): 14,6ng/µl
Genomic DNA was extracted using a CTAB protocol and sequenced with Illumina-like technology by BGI (BGISEQ) with 100 base pair paired end reads, yielding 5G data for each sample (~ 40X)
Time-Course RNA-Seq analysis of Arabidopsis thaliana shoot meristems during floral transition (accession Col-0)
No full textTime-course RNA sequencing during floral transition of micro-dissected meristems from the main shoot of the model plant Arabidopsis thaliana. Plants are wild-type of the reference accession Col-0, (named C in the datasets), derived from stock 186AV of the Versailles Arabidopsis Stock Center.
The time-course is made of four sampling time points corresponding to four developmental stages assessed from temporal and phenotypical cues observed under a binocular on the plant meristems: Vegetative (V), Late vegetative (L), Transitioning (T) and Floral (F). Five to ten micro-dissected meristems were pooled per time point and the entire time course was replicated three times independantly (see Dieudonné S. et al. for details).
cDNA was sequenced using NextSeq500 from Illumina. After classical read quality filtering, each sample yielded on average 43 million sequences
RNA sequencing from inflorescence meristems of three Arabidopsis thaliana mutant lines: puchi x bop1x bop2 ; lfy-12 and jagged-5D
No full textRNA sequencing from micro-dissected meristems of the main shoot of the following mutant lines: the triple mutant puchi-1 x bop1-4 x bop2-11 (PB); the single mutant lfy-12 (L-12), and the single mutant jagged-5D (J5D) at early floral stage (floral transition occured but meristems were sampled before the plants had bolted). These three mutants are in a Col-0 genetic background. Three independant replicates (1, 2, 3) per genotype are provided, each replicate is a pool of ~10 apices. Plants were cultured in classical Arabidopsis growth conditions in culture chambers, starting with 21 days in short days before switching to long-day conditions untill dissection and sampling (See Dieudonné S. et al. for details).
cDNA was sequenced using NextSeq500 from Illumina. After classical read quality filtering, each sample yielded on average 43 million sequences
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
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