1,720,957 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
THE IMPACT OF MIMOSA PUDICA ON THE HISTOARCHITECTURE OF HYPOTHALAMIC-PITUITARY-TESTICULAR AXIS IN CADMIUM TREATED RATS
Get PDFBackground: Cadmium is a known environmental and industrial pollutant with an enormous neuroendocrine disrupting potential. Mimosa pudica Linn is a creeping annual or perennial herb known to possess antiasthmatic, antiepileptic, antitumour, aphrodisiac, analgesic, antidepressant properties and a strong radical scavenging activity. This research was aimed at investigating the impact of Mimosa pudica on the histoarchitectural integrity of the hypothalamic-pituitary-testicular axis in cadmium-treated rats. Materials and Methods: Twenty five mature wistar rats (Rattus rattus norvegicus) were employed in the study. These animals were divided into five groups - 5 Rats/Group; Control, Cadmium Toxicity, Mimosa pudica Extract, Protection and Therapeutic Groups. The Control Group was orally administrated with
distilled water. Result: Toxicity was achieved with 1.2mg/kg body weight for forty days with apparent histological abnormalities and alterations to the axis components. Administration of Mimosa pudica (200mg/kg) body weight with cadmium in both the Protection and Therapeutic Groups showed remarkable histological improvements and markedly reduced tissue damage when compared with Cadmium Toxicity Group. Conclusion: Results of this study demonstrate that Mimosa pudica possesses protective, therapeutic as well as restorative capacity on the histoarchitecture of hypothalamic-pituitary-testicular axis components in cadmium-treated rats
Optimization of amylase and lipase enzymes produced by Bacillus cereus and Bacillus subtilis isolated from waste dumpsites
Get PDFThe enzyme amylase is one of the most important in biotechnology, and lipase operates as a catalytic agent for a broad range of hydrolytic and synthetic activities. This study aimed to assess the optimization of amylase and lipase enzyme produced by microorganisms isolated from selected waste or garbage dumpsite in Akure, Ondo State Nigeria. The isolates were identified using biochemical and cultural characteristics. A total of seven bacterial isolates were identified and quantitative production of amylase and lipase by solid-state fermentation was assessed for each bacterial isolate. The optimization of nutritional and environmental parameters on enzymes produced by the isolated organisms was standardized with respect to incubation time, temperature, pH, and carbon and nitrogen sources. The activity of the enzymes generated was determined by spectrophotometric assay. Of the seven organisms isolated, Bacillus cereus LA326 and Bacillus subtilis AU021 had the highest amylase and lipase activity and were therefore chosen for further research. The maximum level of amylase and lipase activity attained by B. subtilis AU021 was 68.0 mmol/min and 16.3 mmol/min after 18 hours of incubation respectively, while the maximum levels of amylase and lipase activity attained by B. cereus LA326 were found to be 76 mmol/min after 12 hours and 16.3mmol/min after 18 hours of incubation, respectively. The study found that B. cereus and B. subtilis isolated from dumpsites could be efficient producers of biotechnology-relevant enzymes and that environmental conditions could influence their enzyme production
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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