1,720,976 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
Isolation of lignocellulose bioconversion bacteria for reducing sugar production from coconut husk
No full textLignocellulose is the most abundant renewable resource naturally available with great potential for bioconversion to value-added bio-products in this case from coconut husk to reducing sugar. This study was to isolate the lignocellulose bioconversion bacteria from cow dung and termite gut for reducing sugar production. CMC and Congo red dye was used as a selective media to screen for cellulose degrading bacteria while alkaline lignin media used to screen for lignin degrading bacteria. Coconut husk was pretreated using alkaline precipitation method. The 16s rRNA sequence analysis, Gram staining, motility test, crystal formation test and penicillin sensitivity test were used to confirm the bacteria identity. The reducing sugars production was monitor using 3, 5-dinitrosalicyclic acid (DNS) method. Bacterial enzymatic hydrolysis were facilitated through fermentation of 5 locally isolated bacteria at 6 shaking regimes which were 0rpm, 50rpm, 100rpm, 150rpm, 200rpm and 250rpm and conditions were fixed at pH7.0 and temperature 25oC. The total of 39 and 28 colonies were isolated from cow dung and termite gut respectively. The isolates T10, T19, T22, T24, C19, and C37 were identified as Bacillus thuringiensis, Enterobacter aerogenes, Bacillus pumilus, Bacillus vireti, Bacillus anthracis, and Bacillus thuringiensis. In PC medium, 2 bacteria strains, T19 and C37 showed the highest concentration of reducing sugar production (after 18 to 20 hours) which was 1.28 g/L at 150rpm (T19) and 1.27 g/L at 200rpm (C37). While in CMC medium, T19 and C37 also showed the highest concentration of reducing sugar production which was 0.72 g/L at 150rpm (T19) and 0.70 g/L at 200rpm (C37). These bacteria demonstrated significant (p < 0.05) to degrade cellulose was shown by measuring the diameter of clearing zone signifying metabolism of cellulose and also the ability to convert both PC and CMC to reducing sugars measurable by DNS method. This study suggests that the PC resulted in higher reducing sugar production compare to CMC at 150rpm and 200rpm by E. aerogenes and B. thuringiensis which these bacteria isolated from cow dung and termite gut. Future studies on metabolic pathway and specific reducing sugar produced may be done using High Performance Liquid Chromatography (HPLC) analysis
Explorative Xylitol Detection from Lignocellulosic Biomass Fermentation of Coconut Husk Using HPLC C18 Column
No full textDispelling 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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
