1,720,957 research outputs found
Los filósofos presocráticos : la naturaleza como fuente de experiencia abstracta.
Get PDFEn este artículo se afronta la discusión filosófica respecto a los aspectos que cimientan
la antigüedad griega. Se muestra que los fundamentos de esta civilización no se pueden enmarcar
en un solo aspecto, sino en múltiples elementos que se sintetizan en dos tipos de experiencia: La
experiencia de la razón y la experiencia empírica. Para mostrar la tensión dialéctica de estos dos
tipos de experiencia se describe el surgimiento de la geometría con Tales de Milet
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
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
La teoría de funciones de Baire. La constitución de lo discontinuo como objeto matemático
No full textEn esta obra se aborda un capítulo de la historia de las matemáticas, haciendo énfasis en un periodo de veinte años: la última década del siglo XIX y la primera del siglo XX. Particularmente se concentra la atención en el desarrollo de la teoría de funciones discontinuas mediante la cual se abre la perspectiva de la teoría de funciones como disciplina matemática. Para ello se toma como referencia la obra del matemático francés René Baire (1874-1932), especialmente su tesis doctoral de 1899: Sur les fonctions de variables reélles, en la cual se define su famosa clasificación de funciones discontinuas, conocida como las clases de Baire. Se describe la manera como Baire desarrolla un dispositivo teórico que permite el reconocimiento de lo discontinuo como objeto matemático. Igualmente se estudian algunos antecedentes importantes que actuaron como catalizadores y se detalla la influencia de los desarrollos de Baire, especialmente en las investigaciones del matemático, también francés, Henri Lebesgue (1875-1941), sobre las funciones representables analíticamente. Al final se detalla la controversia filosófica que enfrentó a Baire, Borel y Lebesgue de un lado, y Hadamard, del otro, sobre el tipo de existencia de los objetos matemáticos
La representación de funciones y su impacto en la emergencia de la topología: de René Baire a Maurice Fréchet.
No full textAunque la investigación realizada es de corte epistemológico, está enmarcada en la perspectiva general de reconstruir procesos históricos y dar cuenta de la constitución de teorías y ramas de las matemáticas.Incluye bibliografía
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