1,720,955 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
Estudio experimental del comportamiento de un contador digital en presencia de armónicos
Full text linkEl objetivo del trabajo en cuestión es probar el correcto funcionamiento del contador monofásico CERM1, poniendo especial énfasis en el comportamiento ante corrientes armónicas.
Para ello se han desarrollado varias pruebas sometiendo el instrumento a cargas lineales y no lineales, y se ha comparado la información mostrada por el aparato con la obtenida mediante el procesado de las señales obtenidas con un osciloscopio en el software de programación LabVIEWThe objective of this study is to test the proper operation of the CERM1 meter box, especially under current harmonics.
To achieve that some experiments have been designed in the laboratory. In these experiments the meter box has been connected to both linear and non-linear loads, and the information given by this instrument has been compared with the results given by the software LabVIEW based on the signals of an oscilloscope.Grado en Ingeniería en Tecnologías Industriale
Estimación de parámetros de células fotovoltaicas mediante algoritmos de optimización
Full text linkLas células fotovoltaicas son habitualmente modeladas como circuitos. Encontrar los parámetros adecuados del
modelo es muy importante para el seguimiento del punto de máxima potencia y maximizar la energía generada
en el panel fotovoltaico. El objetivo de este estudio es encontrar la mejor manera de obtener los parámetros de
los modelos de diodo simple y diodo doble, así como cuál de los dos modelos es mejor en cuanto a precisión.
Para ello se han probado cuatro algoritmos diferentes en MATLAB suponiendo dos escenarios: que se dispone
de datos experimentales en distintos puntos de la curva I-V, o que solo se tienen los tres puntos habituales
suministrados en el catálogo. Finalmente se obtienen unas conclusiones a partir de los resultados obtenidos en
ambos escenarios.Photovoltaic cells are usually modelled as circuits. Finding proper model parameters is very important for power
point tracking and maximum energy generation. The purpose of this study is determining the best way to obtain
the parameters of single and double diode models, as well as which of both models has better accuracy. In order
to accomplish this task four different algorithms have been tested with MATLAB in two different situations: in
one case there are several experimental points of the I-V characteristic; in the other case there are not, so
datasheet points are used. Finally, the results obtained of both situations are discussed.Universidad de Sevilla. Máster en Ingeniería Industria
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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