1,720,978 research outputs found
Inmigración: entre la globalización y el nacionalismo en argentina
Full text linkFil: Borgarello, E. Susana. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Borgarello, Matías Ignacio. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.El cuestionamiento a aquellos que ingresan al país en la búsqueda de un nuevo futuro no es novedosa ni propia del siglo XXI ya a comienzos del siglo comienzan las diatribas por los círculos vinculados al poder y la burguesía local contra el ingreso de ciertos inmigrantes catalogados de "indeseables" su producto será el dictado en nuestro país de la Ley de Residencia y la ley de Defensa Social, que expresaban la preocupación por encontrar un modo de limitar el ingreso de inmigrantes. Hoy el gobierno argentino ha propuesto modificaciones migratorias, ingresamos a la era neoliberal del siglo XXI a través de un Decreto de Necesidad y Urgencia (DNU) Normativa por la que el Poder Ejecutivo modificó la Ley de Migraciones Nº 25.871, a los fines de impedir el ingreso de extranjeros que hayan cometido delitos y acelerar -asimismo- los procesos de deportación. Conforme reciente jurisprudencia nacional, el conocimiento del idioma nacional constituye una precaución ineludible para el otorgamiento de la nacionalidad argentina, pues si bien no es un requisito formal no hay dudas que para ejercer los derechos políticos, que asume al ser naturalizado argentino, se torna imprescindible para poder ejercerlos en forma competentehttp://www.uncuyo.gov.arFil: Borgarello, E. Susana. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Fil: Borgarello, Matías Ignacio. Universidad Nacional de Córdoba. Facultad de Derecho; Argentina.Otras Derech
Perfluorinated surfactants: properties and applications. Part III: Phase diagrams of four components systems
No full textPhase diagrams of a four component system consisting of FC807 (perfluorosurfactant), isopropanol, water and RM101 (perfluorinated hydrocarbon) have been determined. The change of the shape of the isotropic region with different perfluorocarbon content, the rheological properties, and the oxygen solubilizing capacity of the isotropic mixtures are discussed
Perfluorinated surfactants: properties and applications. Part I: Thermodynamic properties
No full textThermodynamic properties of fluorinated surfactants are briefly reviewed. They have been principally obtained by the dependence of the c.m.c. on temperature and pressure and only a few direct measurements have been done. The differences in thermodynamic parameters of micellization between fluorinated surfactants and their protonated counterparts have been attributed to the more pronounced hydrophobic character of the perfluoroalkane moiety, confirmed by the positive free-energy of transferring the -CF2- group from the singly dispersed to the micellar state, higher than that of the -CH2- group. The behaviour of a mixed fluorocarbon-hydrocarbon surfactant micellar solution has been explained in terms of non-ideality of mixing, determining the coexistence of two different kinds of mixed micelles, one rich in hydrocarbon, the other in fluorocarbon surfactants. The studies of ternary systems, water-surfactant-solubilizate, done by means of different techniques, do not agree, probably because of kinetic reasons; nevertheless they put in evidence that the energy of transfer for a methylene group in a fluorocarbon micelle, due to the non-ideal mixing between hydrocarbon and fluorocarbon, is less negative than in a hydrocarbon micelle. The enthalpic data for sodium perfluorooctanoate aqueous solution, obtained from heats of dilution by means of an LKB flow microcalorimeter are also reported. The enthalpy of micellization, evaluated by using the pseudo-phase transition model, results in 8.70 kJ mol-1, in good agreement with the value obtained by using the one-step mass action model of Woolley and Burchfield. © 1990
Perfluorinated surfactants: properties and applications. Part II: Monophasic perfluorinated oil-surfactant-water system
No full textThe solubilization of perfluorocarbons in a water-perfluorocarboxylic acid solution has been investigated: a region of W/O isotropic monophasic fluid system is formed. Addition of sodium hydroxide decreases the W/O solubility area forming a new solubility area with water as the continuous phase. © 1990
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
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