1,720,968 research outputs found
La minería y la metalurgia en el centro y norte mexicanos: La Compañía Metalúrgica Mexicana
No full text"El capítulo analiza el papel de la Compañía Metalúrgica Mexicana en el desarrollo industrial de la minería y la metalurgia en el centro y norte de México, durante el Porfiriato. A través del estudio de su organización técnica, su infraestructura y sus vínculos con empresas mineras nacionales y extranjeras, Moisés Gámez Rodríguez destaca la importancia de esta compañía como eje articulador entre extracción, transformación de minerales y dinamismo regional, particularmente en entidades como Coahuila, San Luis Potosí y Nuevo León"
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
Reestructuración productiva y desplazamiento pendular de la fuerza de trabajo en la Cuenca Carbonífera de Coahuila, México
No full textThe purpose of this paper is to analyze the day-to-day spatial pattern make-up within an economic restructuring framework. Coahuila´s Coal Basin was an economic region based on mining from the late 19thcentury until nearly the late 1980s, During this long period, the mining-works market was characterized by the workers pendular mobility (between places of residence and labor). Today, with a privatized steel industry (and also the remaining mining industry), and the appearance of the maquila (contract-manufacturing) industry in the region, the labor market has diversified in economic activity and share therein. However, although this mobility is still at the core of labor market, conditions have changed, since workers increasingly resent this daily mobility process
LA EXPLOTACIÓN DEL CARBÓN EN LA CUENCA CARBONÍFERA DE COAHUILA (1866-1900). LA DIVISIÓN ESPACIAL DEL TRABAJO
No full textEl trabajo revisa la formación de un espacio económico en el norte de Coahuila. Se destacan las principales acciones económicas (construcción en la última mitad del siglo XIX del Ferrocarril Internacional, apertura de minas, coquizadoras, y lavadoras de carbón), políticas (expropiación del latifundio Sánchez Navarro) y sociales (inmigración) que estructuraron las relaciones originarias de la cuenca. Este espacio, sin embargo, no prosperó sólo a partir de sus condiciones internas: su construcción fue consolidada sólo cuando se incluyó en la división espacial del trabajo de México
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