1,720,970 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
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
Withaferin A – A natural multifaceted therapeutic compound
Full text linkCOVID 19, which has lead to the death of millions of people, is still spreading worldwide. The development of any new drug after proper trial is much time consuming. This present global pandemic situation has lead the researchers around the world to run behind various existing antiviral and immunomodulatory natural compounds to overcome this contagious disease. Withania somnifera (ashwagandha) that is being used in Ayurvedic medicine for several ailments since several years is also said to pocess anti viral activity. Thus many of its metabolites are being studied individually for its efficacy against the dreadful disease. Withaferin A, a steroidal lactone from ashwagandha is one such prime metabolite which beyond acting as an antioxidant or antimicrobial agent, is also said to pocess anti-inflammatory to anti carcinogenic properties. Thus because of its wide spectrum of medicinal properties it has now become an attractive drug candidate for several preclinical studies. This increase in the demand for withaferin A has chanelled its way towards in vitro propagation of the plant Withania somnifera and trials on various strategies to increase the yield in terms of plant biomass as well as the withaferin content in the plants thus making it a better alternative to field grown plants. Thus this article reviews in depth on the important medicinal properties of withaferin A, its demand in Ayurveda industry and the in vitro strategies being carried out to overcome the demand
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
INFLUENCE OF AUXIN ON BIOMASS PRODUCTION AND WITHANOLIDE ACCUMULATION IN ADVENTITIOUS ROOT CULTURE OF INDIAN RENNET: WITHANIA COAGULANS
Full text linkObjective: Withanolides are the biologically active, principle compound present in Withania coagulans, which is having a high medicinal value and possesses potent therapeutic activity. The present study was attempted with an objective to investigate a biomass growth and withanolide production in in vitro root tissues of W. coagulans.Methods: High-performance thin layer chromatography (HPTLC) often serves as a method for quantification of major withanolides. In the present study, methanolic withanolide extract of in vitro cultured W. coagulans root tissue were carried out using HPTLC. The HPTLC analysis was performed using precoated silica gel aluminum plate (20 cm × 20 cm) 60F254 (E.MERCK, Germany) with mobile phase toluene: ethyl acetate: formic acid (5:5:1).Results: The optimization of different combination and concentration of plant growth regulators (indole-3-butyric acid [IBA] and indole-acetic acid) was used to stimulate the biomass growth and withanolide production. The maximum biomass growth (7.48±0.25 g/dL) was observed in medium with 4.93 μM−1 IBA. The higher amount of withanolide A (204.98±0.87 μg/L DW) and withaferin A (227.15±0.57 μg/L DW) accumulation was recorded in culture grown on half Murashiga-Skoog media supplemented with 4.93 μM−1 and 2.46 μM−1 IBA.Conclusion: We concluded that in vitro-cultured system could provide unique opportunities for large-scale production of pharmaceutically important compound than field grown plants
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