1,720,972 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
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
Effect of Flavoring and Humectant Agents on the In Vitro Release of a Decapeptide from a Chewing Gum Formulation
No full textPurpose.
To study the effect of flavors (peppermint oil and methyl salicylate) and humectants (glycerin and paraffin) on the in vitro
release of KSL (W), an antibacterial/antiplaque agent, from a chewing gum formulation.
Methods.
The release of KSL (W) from the gum formulation was studied using a chewing apparatus (artificial saliva at 37°C, 50
strokes/min) and the KSL (W) was analyzed by reversed-phase HPLC.
Results.
After 40 minutes of chewing gums containing 0, 1.5, 3, and 7% w/w of peppermint oil, the release of KSL (W) was 80, 81,
84, and 91 %, respectively. Methyl salicylate at a concentration of 5% w/w resulted in an increase of KSL (W) release by ~
25% after 40 minutes of chewing. Gum formulations containing 0.5 and 5% of glycerin released ~ 50% and 57% of KSL (W)
after 10 minutes, respectively, and a plateau (~ 86%) was reached after 60 minutes for both formulations. Glycerin
substantially accelerated the initial release of KSL (W) possibly due to softening the consistency of the gum base. The
addition of 3.5% of liquid paraffin increased the peptide release rate as well; approximately 60% of peptide was released after
10 minutes and the complete release was achieved within 40 minutes. A blend of 0.5% glycerin and 1.5% of peppermint oil
showed a desirable release profile and was selected as optimal for a chewing gum formulation.
Conclusion.
The addition of the flavor agents, peppermint oil and methyl salicylate, and the humectants, glycerin and liquid paraffin,
resulted in an increase of KSL (W) release and the combination of glycerin and peppermint oil provided a favorable gum
consistency and taste
Evaluation of Abrasive Agents on the In Vitro and Chew-Out Release of a Decapeptide from a Chewing Gum Formulation
No full textPurpose.
To evaluate a number of abrasive agents (calcium carbonate, calcium phosphate, sodium bicarbonate, and colloidal silica) on
the in vitro and chew-out release of KSL (W) from a chewing gum formulation.
Methods.
The release of KSL (W) from the gum formulation was studied using a chewing apparatus (artificial saliva at 37°C, 50
strokes/min) and a chew-out method. KSL (W) was analyzed by reversed-phase HPLC.
Results.
Without an abrasive agent, approximately 30 and 75% of KSL (W) was released from the gum formulation after 10 and 40
minutes, respectively. The addition of calcium carbonate increased the release of the peptide by approximately 10%, while
calcium phosphate did not show any substantial effect on the release of KSL (W). Colloidal silica did not affect the release
while sodium bicarbonate decreased the release. In vivo chew-out studies indicated that the release of KSL (W) was higher
than that obtained using the chewing machine apparatus. The taste and the consistency of gums containing the abrasive
agents were acceptable with the exception of those containing colloidal silica. The silica particles aggregate between the teeth
and irritate the gum tissues. Because of these observations, the colloidal silica does not appear to be a good candidate as an
abrasive agent.
Conclusion.
The results suggest that calcium carbonate and calcium phosphate are suitable abrasive agents in this antibacterial/antiplaque
gum formulation
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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