1,720,959 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
EFFECT OF ACTIVITY AND ENVIRONMENTAL IMPACTS ON THE ANTIOXIDANT DEFENCES OF VARIOUS AIR-BREATHING TELEOST FISHES
Get PDFThe determination of heavy metal-induced changes in the physiology and survival of aquatic organisms is complicated because such changes differ from metal to metal, species to species and from one experimental condition to another. The findings of the present study substantiate earlier findings that antioxidant enzymes such as superoxide dismutase (SOD), Catalase (CAT) and lipid peroxidation in fish can be effectively used as biomarkers of copper toxicity. The present study also emphasizes that fish can serve as valuable bioindicators and can serve as useful alternative models for understanding oxidative stress. Piscine systems have several advantages for studying oxidative stress, such as the reducing/avoiding the number of mammals used in the research, cost-effectiveness and the ability to enhance the power of the experiment by increasing the number of organisms per study. Experiments could be designed using transgenic fish to perform knockout experiments and evaluate how oxidative stress may influence gene expression in piscine models. We conclude that piscine models can also be used to study oxidative stress and to evaluate environmental issues from both a human health and ecological perspective
ENDOGENOUS ANTIOXIDANT COMPLEX AND SUPEROXIDE DISMUTASE PERFORMED IN SOME NON-AIRBREATHING FISHES
Get PDFThe toxic effect could be evaluated through the assay of antioxidant enzymes. Such enzymes safeguard life forms against oxidative damage by toxic metals. Oxidative stress has been a significant feature of toxicology in recent times and also has gained growing recognition. Analysis has developed from the simple study of the symptoms of oxidative damage only at stage of the organism to the explanation of the fundamental processes at the biochemical and metabolic stages. There is the confirmation that oxidative stress often has an ecological significance, especially in the aquatic ecosystem, which is really the ultimate trap for several oxidative stress-producing contaminants. Based on the evidence presented with both mammalian and swimming pool environments, the detrimental and adaptive pathways of oxidative stress tend to be somewhat identical. The current study also points out is that fish can serve as significant bio - indicators and therefore can act as a viable substitute. In the present study a survey of levels of the antioxidant defence enzyme, superoxide dismutase were conducted in a varieties of water non Air breathing fishes collected from different sites using various metabolically active tissues (viz. liver, brain, kidney, gills, heart etc.) of the investigated fishes. The results showed that the highest Cu-Zn SOD (9.3 unites. mg-1 protein) was found in liver and lowest Cu-Zn SOD (0.1 units. mg-1 protein) was observed in the brain tissue of the fish Labeo rohita compared with other ones
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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