1,720,956 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
No full text“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
No full textWe 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
No full textWe 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
Study of the complete genome sequence of Streptomyces scabies (or scabiei) 87.22
No full textA study of the complete genome sequence of Streptomyces scabies 87.22, a common
causative agent of scab disease of tubers including potato (Solanum tuberosum), is
described. This work includes annotation of the genome and in-depth description of
gene clusters likely to encode biosynthetic pathways for complex natural products
and not also found in either “Streptomyces coelicolor” A3(2) or Streptomyces
avermitilis MA-4680.
Twenty-eight gene clusters were identified as likely to encode enzymes for the
biosynthesis of complex natural products. Substances predicted by this work, not
previously known to be made by S. scabies 87.22, were confirmed by collaborators
as products - desferrioxamines, germicidins, and hopene. Of the clusters identified,
fourteen gene clusters are not conserved in the other two streptomycete genome
sequences for which comparisons have been undertaken. The Streptomyces genus is
a reservoir of producer organisms from which many complex natural products of
therapeutic importance have been isolated. These findings suggest that the cargo of
cryptic and silent gene clusters amongst other members of this genus may add
significantly to previous estimates of undiscovered bioactive natural products.
Methods developed in this work could enable other researchers to rapidly identify
gene clusters likely to encode enzymes involved in biosynthesis of complex natural
products from complete genome sequences. De-replication is a problem for
approaches to drug discovery based on activity screening and isolation of wild
producer organisms. Computational methods in this work allow rapid de-replication
of gene clusters following sequencing which may lead to discovery of many new
natural products with therapeutic benefit.
Sequences predicted to be involved in scab disease pathogenicity are not found in
only one ‘pathogenicity island’ location as expected, but at several loci. Two
possible mechanisms were identified from sequence data which it is suggested could
be involved in regulation of pathogenicity traits: an MbtH-like protein family and an
iron box sequence likely to be triggered response to low iron conditions
Study of the complete genome sequence of Streptomyces scabies (or scabiei) 87.22
No full textA study of the complete genome sequence of Streptomyces scabies 87.22, a common causative agent of scab disease of tubers including potato (Solanum tuberosum), is described. This work includes annotation of the genome and in-depth description of gene clusters likely to encode biosynthetic pathways for complex natural products and not also found in either “Streptomyces coelicolor” A3(2) or Streptomyces avermitilis MA-4680. Twenty-eight gene clusters were identified as likely to encode enzymes for the biosynthesis of complex natural products. Substances predicted by this work, not previously known to be made by S. scabies 87.22, were confirmed by collaborators as products - desferrioxamines, germicidins, and hopene. Of the clusters identified, fourteen gene clusters are not conserved in the other two streptomycete genome sequences for which comparisons have been undertaken. The Streptomyces genus is a reservoir of producer organisms from which many complex natural products of therapeutic importance have been isolated. These findings suggest that the cargo of cryptic and silent gene clusters amongst other members of this genus may add significantly to previous estimates of undiscovered bioactive natural products. Methods developed in this work could enable other researchers to rapidly identify gene clusters likely to encode enzymes involved in biosynthesis of complex natural products from complete genome sequences. De-replication is a problem for approaches to drug discovery based on activity screening and isolation of wild producer organisms. Computational methods in this work allow rapid de-replication of gene clusters following sequencing which may lead to discovery of many new natural products with therapeutic benefit. Sequences predicted to be involved in scab disease pathogenicity are not found in only one ‘pathogenicity island’ location as expected, but at several loci. Two possible mechanisms were identified from sequence data which it is suggested could be involved in regulation of pathogenicity traits: an MbtH-like protein family and an iron box sequence likely to be triggered response to low iron conditions.EThOS - Electronic Theses Online ServiceGBUnited Kingdo
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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