1,722,882 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
Estudio observacional prospectivo EPIC03-BIOSS. Análisis del stent dedicado BIOSS LIM C en angioplastias en bifurcación
No full textIntroduction and objectives: To describe the efficacy of the BIOSS LIM C dedicated sirolimus-eluting stent to treat coronary bifurcation lesions, and impact on the bifurcation angle and carina through quantitative coronary angiography.
Methods: Observational prospective study including 124 patients with bifurcation lesions treated with a BIOSS LIM C dedicated sirolimus-eluting stent excluding restenotic lesions and those without main vessel involvement.
Results: The stent was successfully deployed in 121 patients (97.6%) while in 18 (14.5%) double stenting was used. The quantitative coronary analysis has shown proper stent expansion with a mean residual stenosis of 18% in the proximal segment, nearly 0% in the distal segment, and 21% in the side branch. The angiographic results of double stenting showed higher mean diameters (2.12 ± 0.30 vs 1.60 ± 0 .42; P < .001), and lower residual stenosis (18.36 ± 9.94 vs 28.49 ± 14.19%, P < .01). Distortion imposed on the bifurcation angulation was minimal with an absolute reduction of 5 degrees (52.8 ± 18.4 vs 47.5 ± 17.2; P = .001).
Conclusions: The dedicated BIOSS LIM C stent has had a very high success rate to treat coronary bifurcation lesions. Angiographic results are good with a remarkably low impact on the native bifurcation angulation, and excellent results from double stenting. We think this can be a very useful device to treat coronary bifurcation lesions with the advantage of easing out the bailout deployment of a second stent into the side branch.Introducción y objetivos: El estudio EPIC03-BIOSS se llevó a cabo para describir la eficacia del stent farmacoactivo dedicado BIOSS LIM C en el tratamiento de las lesiones en bifurcación, así como la modificación inducida sobre la lesión en bifurcación por angiografía cuantitativa automatizada.
Métodos: Estudio observacional prospectivo en el que se incluyeron 124 pacientes con lesión en bifurcación tratados con stent farmacoactivo BIOSS LIM C, excluidas las lesiones por reestenosis y aquellas en las que no había afección del vaso principal.
Resultados: El stent se implantó con éxito en 121 pacientes (97,6%); en 18 (14,5%) se utilizó una técnica de 2 stents. El análisis por angiografía cuantitativa automatizada mostró una estenosis residual media del 18% en el segmento proximal, de prácticamente el 0% en el segmento distal y del 21% en la rama lateral. Los resultados angiográficos para la técnica de doble stent muestran unos diámetros (2,12 ± 0,30 frente a 1,60 ± 0,42 mm; p < 0,001) y estenosis residuales (18,36 ± 9,94 frente a 28,49 ± 14,19%; p < 0,01) significativamente mejores. La distorsión sobre la angulación nativa del vaso resultó mínima, con una reducción absoluta de unos 5° (52,8 ± 18,4 frente a 47,5 ± 17,2°; p = 0,001).
Conclusiones: El stent BIOSS LIM C consigue una elevada tasa de éxito para el tratamiento de las lesiones en bifurcación. Los resultados angiográficos son buenos, destacando la escasa distorsión sobre la angulación nativa del vaso y los excelentes resultados angiográficos de la técnica de doble stent. Consideramos que puede ser un buen dispositivo para el tratamiento de las bifurcaciones, con la ventaja de poder facilitar la implantación no prevista de un segundo stent
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