1,720,971 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
Diagnostic accuracy of ultraviolet-induced fluorescence dermoscopy in non-neoplastic dermatoses (general dermatology): A multicentric retrospective comparative study
No full textBackground: Preliminary data support the possible use of ultraviolet-induced fluorescence (UVF) dermoscopy in general dermatology, yet no accuracy analysis has been performed so far. Objective: To evaluate diagnostic accuracy of UVF dermoscopy in clinically similar non-neoplastic conditions as compared to polarized light-based dermoscopy. Methods: Patients with dermatoses potentially showing UV-induced findings were considered; cases were grouped according to clinical patterns and controls were also included. Standardized evaluation of dermoscopic pictures of the target lesion along with comparative and accuracy analysis were performed for polarized and UVF dermoscopic findings. Results: A total of 208 patients were included [31 foot intertrigo (7 due to Pseudomonas, 13 due to Corynebacterium and 11 due to dermatophytes); 57 intertrigo of major creases (18 inverse psoriasis, 13 erythrasma, 15 tinea infections and 11 candidiasis); 16 acne (papulopustular) and 13 Malassezia folliculitis; 46 papulosquamous dermatoses (14 guttate psoriasis, 11 lichen planus, 12 pityriasis rosea and 9 pityriasis lichenoide chronica); and 45 hypopigmented macular dermatoses of the trunk (9 progressive macular hypomelanosis, 9 idiopatic guttate hypomelanosis, 13 vitiligo and 14 achromic pityriasis versicolor)]. Significant (p < 0.01) UVF was seen in several conditions: green in Pseudomonas foot intertrigo; red in Corynebacterium foot intertrigo, inverse and guttate psoriasis (arranged around dermal papillae in the former), progressive macular hypomelanosis (folliculocentric distribution) and erythrasma (showing polygonal or structureless appearance); blue fluorescent concretions along hair shaft in erythrasma; light green in achromic pityriasis versicolor and tinea of major creases; and blue follicular in Malassezia folliculitis. Additionally, both acne and achromic pityriasis versicolor were also associated with interruption of uniform follicular red fluorescence. Notably, polarized and UVF dermoscopy were related to the most accurate feature in nine and eight analysed dermatoses, respectively. Conclusion: UVF dermoscopy improves recognition of non-neoplastic dermatoses, yet it should be considered complimentary to polarized light-based dermoscopy to increase diagnostic performance
Diagnostic Accuracy of Polarized and Ultraviolet Fluorescence-Induced Dermoscopy in Scarring and Nonscarring Alopecias: a Retrospective Observational Multicentric Study
Full text linkIntroduction: There is growing evidence that ultraviolet-induced fluorescence (UVF) dermoscopy may improve diagnostic accuracy in non-neoplastic dermatoses, yet data on hair disorders are scarce. The aim of this observational retrospective study was to compare the accuracy of polarized dermoscopy and UVF-dermoscopy in characterizing and distinguishing scarring and nonscarring alopecias. Methods: A total of 84 patients were enrolled, with 43 and 41 patients suffering from nonscarring and scarring alopecias, respectively. Analyzed variables included scarring findings (i.e., dotted/globular, structureless or perifollicular bright white areas on both polarized and UVF-dermoscopy) and follicular unit (i.e., hair or follicular ostia, with the latter appearing as empty follicular openings and follicular red/blue fluoresce on polarized and UVF-dermoscopy, respectively). Comparative analysis between polarized and UVF-dermoscopy in detecting the abovementioned features and differentiating scarring from nonscarring alopecias were performed, also assessing possible differences according to the skin tone. Interobserver agreement was evaluated for both dermoscopic settings. Results: UVF-dermoscopy was superior (p < 0.01) to polarized dermoscopy in detecting follicular ostia and white bright areas in general and fair-skinned patients, while only follicular ostia were better seen under this setting in skin of color. Additionally, UVF-dermoscopy was found to be more accurate (p < 0.01) in differentiating nonscarring from scarring alopecias when considering all and light phototypes. Finally, Kappa values were 0.57 and 0.83 for polarized and UVF-dermoscopy, respectively. Conclusions: UVF-dermoscopy may be a valuable and reliable complementary tool in differentiating scarring and nonscarring alopecias, especially in light phototypes
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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