1,720,965 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
Assessment of the Apparent Contact Dimension and Co-Variates in Untreated and Orthodontically Treated Dentitions
Get PDFThis study assessed the existence of the Apparent Contact Dimension, a determinant of dental esthetics, using casts of orthodontically treated (n=40) and non-treated (n=27) subjects deemed to possess excellent occlusion. Co-variates studied included tooth size, tooth shape, tip and torque. The average ACD proportions in this study, relative to the height of an ipsilateral central incisor, were found to be 49, 38 and 27 % between the central incisors, central and lateral incisor, and the lateral incisor and canine, respectively. The ACD exhibited a positive correlation (p<0.05) with the height of the clinical crown and a negative correlation (p<0.05) with W/H ratios of the corresponding teeth. No statistically significant correlations were evident between the ACD with the shape of the clinical crown, the tip, and torque. This study is the first to validate the existence and proportions of the ACD
Evaluation of marginal integrity as a result of different finishing instrumentation based on restorative material and margin location
Get PDFPurpose: The purpose of this study was to assess the marginal integrity of composite and glass-ionomer restorations as a function of finishing technique, restorative material and margin location. Materials and Methods: Forty extracted third molars free of defects were assigned to four groups (N=10) according to finishing instruments (aluminum oxide discs, fluted carbides, fine diamonds, and coarse diamond). Each specimen received standardized Class V preparations on the facial and lingual surfaces with occlusal margins on enamel and gingival margins on dentin. Each preparation was randomly assigned to be restored with either resin-based composite (RBC) or resin-modified glass ionomer cement (RMGIC). Specimens were finished with standardized pressure at approximately 0.15 N and evaluated at a magnification of 600X using an environmental scanning electron microscope (ESEM). Occlusal and gingival margins were analyzed using an imaging software and means for all measured gaps were calculated. Data were analyzed using a linear regression using generalized estimating model. Result: There were no statistically significant differences among the four types of finishing instruments used in the study. . RBC-restored specimens exhibited significantly smaller mean marginal gaps (1.70 μm, 7.56 μm) than RMGI-restored specimens (5.24 μm, 14.24 μm) in enamel and dentin margins, respectively. There was a statistically significant difference between enamel and dentin with regards to marginal gap formation. Conclusion: Under the conditions of this study, marginal gap formation was not affected by finishing technique. Resin-based composite margins exhibited significantly less marginal gap than did resin-modified glass ionomer margins, while enamel margins resulted in significantly less marginal gap than did dentin margins.Master of Scienc
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
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