1,720,965 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
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
Assessment of the spectrum of activity of a new insecticide based on Clitoria ternatea extract
Full text linkClitoria ternatea L. (butterfly pea), is a plant species belonging to the Fabaceae family, which was extensively studied for its pharmacologically activities. Besides the medicinal uses, in agriculture it is considered an excellent forage legume, with very good regrowth and yields, and cover crop. Young and tender parts of the plant (shoots, leaves, flowers and pods) are edible and frequently consumed in India. Recent studies also indicate that C. ternatea possess insecticidal effects, mainly related to its content in cyclotides and flavonoids. Putative cyclotides have been now been identified in the seed, the leaf and the flower. Cyclotides are molecules composed of 28-37 amino acids in a head-to-tail cyclic backbone with three interlocking disulfide cystine bonds (cyclic cystine knot motif) and are mainly produced by plants as defence proteins. Putative mode of action is hypothesised to be similar to the endotoxin of Bacillus thuringiensis. Currently the efficacy of C. ternatea extracts as insecticide has been characterised mainly against Helicoverpa punctigera, however its spectrum of activity can be theoretically larger. The aim of this research was to explore the possible use of C. ternatea extracts against a wide range of phytophagous insects. More specifically, a formulated extract of C. ternatea was tested under controlled conditions against a leaf miner (Antispila oinophylla; Lepidoptera: Heliozelidae), an aphid (Aphis gossypii; Hemiptera: Aphididae), white flies (Trialeurodes vaporariorum; Hemiptera: Aleyrodidae), a fruit fly (Drosophila suzukii; (Diptera: Drosophilidae), trips (Frankliniella occidentalis; Thysanoptera: Thripidae), bugs (Halyomorpha halys; Hemiptera: Pentatomidae), the grapevine moth (Lobesia botrana; Lepidoptera: Tortricidae), and a leafhopper (Scaphoideus titanus; Hemiptera: Cicadellidae). The efficacy trails resulted in a good efficacy against trips and white flies, which was also confirmed by field trials. Promising results were obtain against some other species, however further analysis will be necessary to confirm the efficacy. Based on the results obtained, the formulated C. ternatea extract can be considered a new low-risk tool to be used in the integrated pest management of crops
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
Polymorphism of αS1-casein in goat milk: identification of A, B, E and F variants by biochemical and genetic analysis
Full text linkMany researches, related to genetic polymorphism of αS1-casein in goat milk, showed a marked variability and implications in milk and dairy product traits. The genetic variants (from A to G) were associated with four levels of expression: 3,6 g/L per A, B and C (“strong” alleles); 1,6 g/L per E (“medium” allele); 0,6 g/L per F (“weak” allele) and 0 g/L per O (“null” allele). Differences existing among the A, B, C, D, E, F, G and O have been described (Grosclaudeet al., 1994). To analyze genetic polymorphism of caseins from goat milk, distinct electrophoretic (Russoet al., 1986; Addeoet al., 1988) and chromatographic techniques (Jaubert and Martin, 1992; Iamettiet al., 1999) were applied. In last years, the advancement in technological field is allowing the research of primary structure of protein variants (Ferrantiet al., 1997; Trujilloet al., 2000) and basic sequence of new alleles (Martinet al., 1999; Bevilacquaet al., 2002; Ramunnoet al., 2002). In this work, we employed electrophoretic protein separation (IEF and SDS-PAGE), chromatographic analysis (RP-HPLC) and molecular biology techniques based on polymerase chain reaction (real-time PCR) to detect αS1-CN genetic variants from goat milk.
The utility of protein and DNA analysis combination was discussed
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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