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
Identification of Salix L. entities by DNA barcoding.
No full textFollowing the sequencing of a growing number of plant genomes and with the availability of more and more powerful computational tools, DNA sequences are becoming the major source of information in understanding the evolutionary and genetic relationship among plant species. The importance of a comparative sequence analysis is clearly evident in studies aimed at clarifying the taxonomic and phylogenetic relationships at interspecific level. Since 2003 several authors proposed and demonstrated that the nucleotide content of a single gene can be sufficient for the discrimination and the identification of animal species. The experimental reliability and the general applicability of this approach, known as “DNA barcoding”, has been first assessed using the mitochondrial gene CO1 encoding for the subunit I of the cytochrome oxydase .The term “DNA barcoding” refers to a DNA-sequence based identification system that may be constructed of several loci used together as complementary unit to define a specific haplotype. A species can thus be unequivocally identified on the basis of single nucleotide polymorphisms (SNPs) or insertions/deletions (In/Dels) in the most conserved regions of one or a few selected genes. A DNA barcoding approach based on mitochondrial genes is not feasible in plants because of their much slower rate of evolution compared to animals.. This research was aimed at developing molecular diagnostic tests able to screen the plant biodiversity and univocally identify species belonging to the Salix L. genus. For this purpose we assessed the level of sequence divergence (SNP and In/del polymorphisms) among 22 willow species in two chloroplast putative barcode loci to determine which of them maximize species identification when combined as a barcode.
Willow species belonging to Humboldtiana and Salix subgenera were clustered apart, supporting species separation on the basis of bio-geographical and morphological traits, whereas species of subgenera Caprisalix and Chamaetia were unrecognizable on the basis of two chloroplast intergene spacers, this is probably due to their frequent hybrid origin. Nuclear barcode sequences, able to identify recombination events have to be evaluated
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
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