1,721,000 research outputs found
Precisión de los métodos Willems I y Willems II en la estimación de edad dental en una población subadulta de nacionalidad hondureña - 2021
No full textObjetivo. Determinar la precisión de los métodos de estimación de edad dental propuestos por Willems I y su variante Willems II en relación a la edad cronológica en radiografías panorámicas digitales de pacientes hondureños, de 5 a 15 años atendidos en el Centro de especialidades dentales SONRIA de la ciudad de Comayagua, Honduras durante el período 2019-2021. Métodos. La presente investigación fue de tipo descriptivo, comparativo, transversal y retrospectivo. Se evaluaron 106 radiografías panorámicas digitales de pacientes de 5 a 15 años de edad de ambos sexos, se asignaron los estadios de desarrollo dental según el método de Demirjian et al. en los siete dientes de la hemiarcada inferior izquierda, para posteriormente aplicar las tablas de valores de los métodos Willems I y Willems II que, estiman la edad dental directamente en años. Resultados. Para el total de la muestra se encontró que el método de Willems I presentó una diferencia de medias entre la edad cronológica y la edad dental de 0,048 mientras que, para el método de Willems II fue de 0,016, lo que demostró que el método de Willems II fue más preciso en comparación con el método de Willems I en una población hondureña; ambos métodos evidenciaron una subestimación de la edad cronológica. Conclusión. El método de Willems II resultó ser más preciso en comparación con el método de Willems I, sin embargo, ambos métodos son una buena herramienta para estimar la edad dental en una población hondureña
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
Precisión de métodos de estimación de edad dental de Demirjian, Willems I y II en una población cusqueña
No full textObjective. To determine the accuracy of the dental age estimation methods proposed by Demirjian, Willems I and its modification Willems II with the chronological age in digital panoramic radiographs of patients between 6 and 16 years of age attended at the CERADENT Cusco - Peru radiological center, from January to June 2021. Methods. It was a descriptive, cross-sectional and retrospective study in which 220 digital panoramic radiographs of patients of both sexes (6-16 years) were evaluated. The stages of dental maturation proposed by Demirjian et al. were recorded in each dental piece of the lower left hemiarch to subsequently determine the dental age by means of the Willems I, II and Demirjian methods Results. The Willcoxon test was applied to determine the difference in means between the chronological age and the estimated dental age according to each method. For the total sample, it was found that the Demirjian method was the most accurate, presenting a slight underestimation of age in some age ranges for both sexes, followed by the Willems II method and finally the least accurate was the Willems I method, there were minimal differences between these methods, there were also similarities between the results obtained through the Willems I and II methods. Conclusions. The Demirjian method was the most accurate method for estimating dental age in a Cusquenian population; however, since there were no wide differences between the methods studied, the three methods were good age estimators.Objetivo. Determinar la precisión de los métodos de estimación de edad dental propuestos por Demirjian, Willems I y su modificación Willems II con la edad cronológica en radiografías panorámicas digitales de pacientes entre 6 y 16 años atendidos en el centro radiológico CERADENT Cusco – Perú, de enero a junio del 2021. Métodos. Este trabajo fue de tipo descriptivo, transversal y retrospectivo, donde se evaluaron 220 radiografías panorámicas digitales de pacientes de ambos sexos (6-16 años), se consignó los estadios de maduración dental propuestos por Demirjian et al. en cada pieza dental de la hemiarcada inferior izquierda para posteriormente determinar la edad dental mediante los métodos de Willems I, II y Demirjian. Resultados. Se aplicó la prueba Willcoxon para determinar la diferencia de medias entre la edad cronológica y la edad dental estimada según cada método. Para el total de la muestra se evidenció que el método de Demirjian fue el más preciso, presentando una ligera subestimación de edad en algunos rangos etarios para ambos sexos, seguido del método de Willems II y finalmente el menos preciso fue el método de Willems I, existiendo diferencias mínimas entre estos métodos, también se evidenció similitudes entre los resultados obtenidos a través de los métodos de Willems I y II. Conclusiones. El método del Demirjian fue el más preciso para poder estimar la edad dental en una población cusqueña, sin embargo, al no existir diferencias amplias entre los métodos estudiados, los tres métodos resultan buenos estimadores de edad
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
