1,720,968 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
Bioethanol from cheese whey fermentation using Kluyveromyces marxianus biofilm
No full textFuel ethanol production by fermentation of cheese whey solution (lactose) can be a sustainable route for its high volume production worldwide and environmental pollution problem caused due to its high BOD(40-50 g.L−1) and COD(60 - 80 g.L−1) demand. Fermentation of cheese whey using free and immobilized yeasts Saccharomyces cerevisiae(Lewandowska et al., 2007), Kluyvromyces fragilis(Gianetto et al.,1986), Candida psudeotropicalis(Ghaly and El-Taweel,1997), Kluyveromyces marxianus (Ozmihci and Kargi, 2007, Zafar et al., 2005) has been reported with technical problems like poor substrate (lactose) utilization(in case of S.cerevisiae), substrate (lactose) and product (ethanol) inhibition affecting final ethanol concentration (batch) and ethanol productivity (continuous).
Biofilm technology has been extensively applied in wastewater treatment, but its potential application in bioethanol production has not been explored. In general, advantages of biofilms include selective substrate and product diffusion due to layered microbial structure, prevention of cell wash out due to EPS (extra polymeric substance) formation, operational stability due to high resistance to external environment. This latter advantage is in particular sought in the bioethanol fermentation process.
Kluyveromyces marxianus yeast strains has shown excellent ethanol tolerance (free and immobilized) and biofilm forming ability without any selective preference of support in the cited literature. The present research work involves studying the feasibility of anaerobic fermentation of cheese whey using Kluyveromyces marxianus DSMZ 5422 biofilm on particle support in batch and continuous mode. The first phase of the research involves characterization of Kluyveromyces marxianus DSMZ 5422 by fermentation of cheese whey powder solution at different concentration, pH and inoculum concentration. Natural supports such as olive pits and artificial supports such as polypropylene chips are tested for the holding capacity of Kluyveromyces marxianus DSMZ 5422 biofilm. Direct qualitative and indirect quantitative evaluation of the biofilm formation on the different support is carried out
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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