1,720,954 research outputs found
Vínculos entre la enseñanza de la física y la epistemología: el caso de la probabilidad
Full text linkLuego de algunas consideraciones sobre la relación entre la epistemología general y la filosofía de la física, se exponen diferentes interpretaciones del cálculo de probabilidades y sus aplicaciones a la física. Se pretende una aproximación a los diferentes significados atribuidos a la probabilidad en los últimos siglos. El artículo está orientado a docentes e investigadores dedicados a la enseñanza de la física.Beginning with some considerations on the relation between general epistemology and philosophy of physics, different interpretations of the calculus of probability and its applications to physics are exposed. An approximation to the different meanings attributed to probability in the last centuries is intended. The article is oriented to teachers and researchers in the teaching of physics.Fil: Rodriguez, Victor Ruben. Universidad Nacional de Córdoba. Facultad de Filosofía y Humanidades. Centro de Investigaciones María Saleme Burnichón; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin
The quantum Hall effect and its contexts
No full textEn este artículo, se atienden ciertas facetas conceptuales y experimentales del efecto Hall cuántico. Se argumenta que el mismo ofrece variados matices para la reflexión filosófica, desde la generación de entidades teóricas hasta la epistemología de la experimentación. La exposición pretende mantener cierta sensibilidad por la dinámica histórica en torno del tema, como así también por las implicaciones metrológicas de ámbitos cuánticos específicos. Dada la enorme producción científica sobre el tema, se hace un recorte a los fines de rescatar algunos perfiles significativos de los fenómenos asociados con ese efecto.In this paper we address several conceptual and historical aspects of the quantum Hall effect. We argue that this effect offers a variety of perspectives for philosophical reflection, from the generation of theoretical entities to the epistemology of experimentation. The exposition attempts to maintain a certain sensitivity to the historical dynamics around the issue, considering at the same time its metrological implications for specific quantum areas. Given the vast scientific literature on the subject, a cut is made in order to rescue some meaningful profiles of the phenomena associated with this effect.Fil: Rodriguez, Victor Ruben. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Córdoba. Instituto de Humanidades; Argentina. Universidad Nacional de Cordoba. Facultad de Filosofia y Humanidades; Argentin
Hermann Weyl and the gauge
Full text linkSe hace en este trabajo una aproximación conceptual a la noción de gauge introducida por Hermann Weyl, contextualizada en su origen clásico en la segunda década del siglo XX, con un breve comentario sobre su posterior inserción en la mecánica cuántica de la década siguiente, cuando el área estaba consolidándose. Considerando que es conveniente dar para ello un ámbito adecuado en el que es importante atender al estilo de pensamiento de su autor, se presenta un breve perfil del mismo. Se atiende a sus intereses físicos y filosóficos sin dejar de lado su principal tarea profesional como matemático. El punto de vista adoptado sugiere que no es posible comprender en su integridad el pensamiento de este autor si no se contemplan sus facetas relacionadas con estos tres grandes campos disciplinares. Aunque este objetivo en su plenitud escapa por su extensión y sutilezas a este trabajo, se supone que una aproximación introductoria al caso histórico puede contribuir a una mejor comprensión de su alcance posterior, tal como aparece en las numerosas aplicaciones de este concepto en investigaciones contemporáneas vinculadas con la física de partículas elementales.A conceptual approach to the notion of gauge, mainly due to Hermann Weyl, is developed in this work. Its classical origin in the second decade of the XX century is particularly emphasized, with a brief
omment on its posterior insertion in quantum mechanics during the following decade, when this area was emerging. Considering that it is convenient for this purpose to give an adequate framework in which the style of thought of the author is taken into account, a brief profile of it is presented. His physical and philosophical motivations are expounded, but attending to the fact that his main work has been as a professional mathematician. The adopted point of view suggests that it is not possible to comprehend the integrity of his thought without analyzing the aspects related to these three big disciplinary fields. Even though this integral goal is out of the scope of this work, it is assumed that an introduction to the historical case may contribute to a better understanding of its later use, such as it figures in numerous applications of this concept in contemporary researches related to elementary particle physics.Fil: Lamberti, Pedro Walter. Universidad Nacional de Córdoba. Facultad de Matemática, Astronomía y Física; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; ArgentinaFil: Rodriguez, Victor Ruben. Universidad Nacional de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba; Argentin
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
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