1,720,954 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 Effects of Binge Alcohol Consumption on the Developing Brain
No full textExposure to ethanol during the third trimester brain growth spurt can have detrimental effects. Damage to the central nervous system being the most severe outcome resulting from prenatal ethanol exposure causing a range of deficits on a continuum of gross to subtle. Human data on the timing and dose of ethanol exposure that results in perturbation is limited, so the use of animal models in studying these precise effects is critical. This study aimed to investigate the effects of a double binge exposure to ethanol on post-natal day six (PN6) and post-natal day eight (PN8), in the third trimester equivalent of human brain development, using a rat model. The acute affects of ethanol exposure and withdrawal were assessed after the first binge on PN6. At weaning the animals were placed in a reversed light cycle housing environment and activity, anxiety, learning and memory experiments were conducted during the dark cycle, the period of normal activity for the rat. These experiments revealed a marked decrease in locomotion twenty-four and thirty-two hours following the first binge exposure on PN6, with severe seizure activity being greatest at twenty four hours post ethanol exposure. Habituation to an unfamiliar environment was not effected by ethanol exposure. Hyperactivity was observed in the open field and no difference in anxiety related behaviour was apparent following open-field testing. However, elevated T-maze testing revealed a difference in anxiety related behaviour. Ethanol exposed animals had a decreased learned fear response but no difference in innate fear. Learning and memory deficits were observed in novel object recognition testing and both the reference memory and working memory versions of the Morris water maze. Following behavioural testing, a pilot study was carried out to determine the number of synapses on the apical dendrites of the CA1 pyramidal cells was using the physical disector method on electron micrographs. There was a significant decrease in synapses per unit volume in the ethanol treated animals compared to controls. This study provides an important link between structural changes and functional deficits associated with a double binge-like ethanol exposure during the third trimester brain growth spurt
The Effects of Binge Alcohol Consumption on the Developing Brain
No full textExposure to ethanol during the third trimester brain growth spurt can have detrimental effects. Damage to the central nervous system being the most severe outcome resulting from prenatal ethanol exposure causing a range of deficits on a continuum of gross to subtle. Human data on the timing and dose of ethanol exposure that results in perturbation is limited, so the use of animal models in studying these precise effects is critical. This study aimed to investigate the effects of a double binge exposure to ethanol on post-natal day six (PN6) and post-natal day eight (PN8), in the third trimester equivalent of human brain development, using a rat model. The acute affects of ethanol exposure and withdrawal were assessed after the first binge on PN6. At weaning the animals were placed in a reversed light cycle housing environment and activity, anxiety, learning and memory experiments were conducted during the dark cycle, the period of normal activity for the rat. These experiments revealed a marked decrease in locomotion twenty-four and thirty-two hours following the first binge exposure on PN6, with severe seizure activity being greatest at twenty four hours post ethanol exposure. Habituation to an unfamiliar environment was not effected by ethanol exposure. Hyperactivity was observed in the open field and no difference in anxiety related behaviour was apparent following open-field testing. However, elevated T-maze testing revealed a difference in anxiety related behaviour. Ethanol exposed animals had a decreased learned fear response but no difference in innate fear. Learning and memory deficits were observed in novel object recognition testing and both the reference memory and working memory versions of the Morris water maze. Following behavioural testing, a pilot study was carried out to determine the number of synapses on the apical dendrites of the CA1 pyramidal cells was using the physical disector method on electron micrographs. There was a significant decrease in synapses per unit volume in the ethanol treated animals compared to controls. This study provides an important link between structural changes and functional deficits associated with a double binge-like ethanol exposure during the third trimester brain growth spurt
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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