1,721,808 research outputs found
[Entrevista a Gregorio Casasempere Juan]
No full textEntrevista, en dos partes, a Gregorio Casasempere, director de la Sinfónica alcoyana, sobre su trayectoria musica
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
EVALUATION OF THE INHIBITORY ACTIVITY OF VARIOUS UNREPORTED CMP-NEU5AC DONOR CONGENERS ON GM3 SYNTHASE
Full text linkA class of sialosides (down reported 3a-e, 4a-c, 5a-c and 5e), designed to inhibit the biological transfer of sialic acid 1 to the terminal portion of glycoconjugates, mediated by the enzymes sialyltransferases, was synthesized and their inhibitory activities was tested on a α-2,3 sialyltransferase, from Pasteurella multocida, and on GM3 synthase, present both as a cellular homogenate and in a cell line of HEK293 (Human Embryonic Kidney).
The synthesized compounds 3a-e are congeners of the natural sialyl donor CMP-Neu5Ac 2 and incorporate some structural properties of the compound 3a, the only known inhibitor of GM3 synthase enzyme reported in a short note.1
Moreover, we synthesized also the lactones 4a-c and the peracetylated derivatives 5a-c and 5e in order to improve the cell permeability of their parent hydroxyl acids.
The GM3 synthase activity was evaluated detecting the formation of the labeled GM3 in process using lactosyl-ceramide labelled ([3-3H(sphingosine)]LacCer] as acceptor, or labeled sphingosine ([3-3H] SPH) as unsialylated ganglioside precursor.3 Last procedure allowed to evaluate also the complete pattern of gangliosides formed in the cell in the presence or absence of inhibitors. All synthesized compounds were tested on GM3 synthase of HEK cellular homogenate. The more active
acidic compounds were also tested on intact cell lines, improving their lipofilicity, by methyl esterification and after peracetylation. The free compounds 3b-c, 3e and 4c show an inhibitory activity always higher than 3a. Similarly the peracetylated methylester 5b-c and 5-e are more activity than 5a in intact cell lines.
All compounds show an inhibitory activity higher on the cell homogenates than that on HEK cells.
The lactones 4a-c were not active in cell lines probably since they do not cross the cell membrane as the peracetylated methyl ester 5a-e that are actives.
The α-sialoside 5e resulted the most active. This is a very interesting result since evidences that the geometry at the anomeric centre of the glycosyl donor is not an exential requisite.
However, all results together extend the knowledge on inhibitors of GM3 synthase and provide new structural information for the development of other novel STs inhibitors
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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