1,720,968 research outputs found
Una extensión de la distribución weibull de dos parámetros
No full textEn este artículo se presenta una extensión de la distribución Weibull de dos parámetros, con el objetivo de flexibilizar el modelo en términos de la kurtosis. Se estudian las propiedades básicas de la nueva densidad obtenida, así como su función de distribución, momentos, coeficientes de asimetría y kurtosis. Se realizan estudios de simulación para algunos casos particulares, ilustrando la utilidad de la extensión considerada.In this paper, we present an extension of the Two-parameter Weibull distribution to make it even more flexible in terms of its kurtosis coefficient. Properties involving moments and asymmetry and kurtosis indexes are studied. Simulation studies for some cases, illustrating the usefulness of the extension considered, are carried out
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
Analítica multimodal del aprendizaje en Chile: Una revisión sistemática
No full textLa analítica del aprendizaje refiere a la recolección, medición, análisis y reporte de datos provenientes de personas en entornos de aprendizaje. Usualmente busca mejorar procesos de aprendizaje en interacciones humano-computador. La analítica multimodal del aprendizaje amplía el enfoque a interacciones humano-humano, mediante datos provenientes de sensores. Los avances tecnológicos y la mayor demanda de trabajadores con habilidades profesionales diversas, tales como liderazgo o capacidad de trabajar en equipo, han aumentado las investigaciones en esta área en los últimos años. Chile es el país latinoamericano con mayor crecimiento en investigación y desarrollo en esta línea en los últimos cinco años. Este trabajo presenta una revisión sistemática de los avances en analítica multimodal realizados en Chile, desde el punto de vista de las modalidades consideradas (e.g., imagen, audio, vídeo) y los tipos de sensores usados para medirlas, los tipos de actividades empleadas, técnicas de análisis, productos obtenidos, y redes de colaboración existentes. Nuestro objetivo es entregar una visión amplia y actualizada del estado del arte de la analítica multimodal del aprendizaje en Chile, como actor relevante en esta línea a nivel latinoamericano.Learning analytics refers to collecting, measuring, analyzing, and reporting data from people in learning environments. It usually seeks to improve learning processes in human-computer interactions. Multimodal learning analytics extends the approach to human-human interactions using sensor data. Technological advances and the greater demand for workers with diverse professional skills, such as leadership or the ability to work in a team, have increased research in this area in recent years. Chile is the Latin American country with the highest growth in research and development in this line in the last five years. This work presents a systematic review of the advances in multimodal analytics made in Chile from the point of view of the modalities considered (e.g., image, audio, video) and the types of sensors used to measure them, the types of activities used, analysis techniques, products obtained, and existing collaboration networks. We aim to deliver a broad, updated vision of the state of the art of multimodal learning analytics in Chile as a relevant actor in this line at the Latin American level
Evaluación de equipos de trabajo en el marco de Aprendizaje Basado en Proyectos y Métodos Ágiles
Full text linkExisten muchos estudios que destacan las ventajas que tiene la aplicación de Aprendizaje Basado en Proyectos (ABP) en la enseñanza de Ingeniería de Software. Por otra parte, los Métodos Ágiles son la alternativa más apropiada para ámbitos de trabajo con alta incertidumbre, como lo es el desarrollo de software. Así, aplicar ABP basado en Métodos Ágiles es una combinación conveniente para docencia en Ingeniería de Software. Sin embargo, no existe consenso respecto del método más conveniente para la evaluación de los integrantes de un equipo de trabajo en el contexto de proyectos con Métodos Ágiles. En este trabajo se presenta un enfoque de evaluación aplicado en un marco de trabajo ABP en Ingeniería de Software para proyectos desarrollados usando Métodos Ágiles. Este enfoque permite obtener una evaluación para cada integrante de los equipos mediante tres mecanismos: evaluación a nivel de equipo (considerando el producto resultante y la adecuada aplicación de la metodología), coevaluación y autoevaluación (en estos dos últimos haciendo evaluación de Competencias Transversales). La evaluación de los estudiantes se integra de forma natural dentro del desarrollo proyecto, asociándose en cada Sprint a las Reuniones de Revisión y a las Reuniones de Retrospectiva. Además, el trabajo colaborativo y la gestión ágil del proyecto se apoyan en una herramienta que facilita la aplicación del enfoque de evaluación.There are many studies that highlight the advantages of the application of Project Based Learning (PBL) in the teaching of Software Engineering. On the other hand, Agile Methods are the most appropriate alternative for areas of work with high uncertainty, such as software development. Thus, applying PBL based on Agile Methods is a convenient combination for teaching in Software Engineering. However, there is no consensus regarding the most convenient method for the evaluation of the members of a work team in the context of projects with Agile Methods. This paper presents an evaluation approach applied in an PBL framework in Software Engineering for projects developed using Agile Methods. This approach allows obtaining an evaluation for each member of the teams through three mechanisms: evaluation at the team level (considering the resulting product and the appropriate application of the methodology), coevaluation and self-evaluation (in these both by doing evaluation of soft skills). The evaluation of the students is integrated naturally within the project development in Review Meetings and Retrospective Meetings carried on each Sprint. In addition, collaborative work and agile project management are supported by a tool that facilitates the application of the evaluation approach
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
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