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Search Results: 1 - 10 of 211902 matches for " Martín Becerra "
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Estructura y dimensión de las industrias infocomunicacionales en América Latina
Guillermo Mastrini,Martín Becerra
Palabra Clave , 2005,
Abstract: Este artículo presenta resultados parciales de la investigación Estructura y concentración de las industrias culturales y las telecomunicaciones en América Latina , que dirigieron los profesores Guillermo Mastrini (Universidad de Buenos Aires) y Martín Becerra (Universidad Nacional de Quilmes), y que desarrollaron con un grupo organizado por el Instituto Prensa y Sociedad (IPyS). La investigación detalla, con datos sobre el a o 2000, la estructura de las industrias de la cultura, la comunicación y la información en Argentina, Bolivia, Brasil, Chile, Colombia, México, Perú, Uruguay y Venezuela. Así mismo, se establece una comparación basándose en los indicadores de acceso y facturación que permiten observar el tama o de los mercados de prensa escrita, libro, disco, cine, televisión abierta y de pago, radio y telefonía fija y telefonía móvil , sobre el desarrollo y el impacto del sector en América Latina.
La sociedad de la información en la Argentina: una morada desde la Economía Política The mass media society in Argentina: the political economy approach
Martín Becerra,Guillermo Mastrini
Estudos de Sociologia , 2007,
Abstract: Analizar el proyecto de la sociedad de la información en la Argentina plantea, en el plano conceptual, el doble desafío de procurar definir la sociedad informacional a pesar de la multiplicidad de lecturas y enfoques que circulan sobre el proyecto (que en rigor es un conjunto de procesos) y a la vez, hacerlo en el contexto de un país como la Argentina que no está situado en el centro del escenario donde ese proyecto se construye. La construcción de la sociedad informacional es contemporánea a la profundización de las brechas sociales y económicas en la Argentina y sus efectos, en consecuencia, distan de ser positivos. Palabras-clave: Sociedad de la información. Economía política de las comunicaciones en el Argentina. The analysis of the mass media project in Argentina, conceptually speaking, brings the double challenge of trying 1) to define the media society in spite of the multiple readings and focuses that surround the project, really a set of projects, and 2) to implement it in a country that is not in the center of such project. This construction of the media society happens when the social and economic gaps in Argentina are encreasing and their effects are, therefore, far from beeing positive. Keywords: The media society. Political economy of mass media in Argentina.
Estructura, concentración y transformaciones en los medios del Cono Sur latinoamericano Structure, Concentration and Changes of the Media System in the Southern Cone of Latin America
Guillermo Néstor Mastrini,Martín Becerra
Comunicar , 2011, DOI: 10.3916/c36-2011-02-05
Abstract: El presente texto analiza los cambios en la estructura del sistema de medios de comunicación en cuatro países de América del Sur durante la primera década del siglo XXI: Argentina, Brasil, Chile y Uruguay. La premisa general es que los niveles actuales de concentración en los mercados los medios de comunicación se incrementaron durante la última década, como consecuencia de los procesos históricos que han tenido lugar en estos países, aunque cada uno tiene diferentes orígenes y efectos. La profundización del proceso de concentración, la convergencia de los medios con las telecomunicaciones e Internet, la creciente dependencia financiera del sector, la adquisición extranjera de una cantidad importante de sus bienes a manos de las empresas multinacionales y la crisis de los marcos reglamentarios actuales son los principales marcos para la comprensión de la transformación de los medios de comunicación en el Cono Sur de América Latina. Los procesos de cambio identificados en el análisis de la evolución de Argentina, Brasil, Argentina, Chile y Uruguay en los últimos a os no se habrían podido lograr sin la colaboración de los diferentes gobiernos y sin radicales transformaciones en la gestión y la propiedad de los medios de comunicación. The present text analyzes the changes in the structure of the media system in four South American countries during the first decade of the 21st century: Argentina, Brazil, Chile and Uruguay. The general premise is that the current levels of concentration in media markets have accelerated during the first decade of the 21st century as a consequence of the historical processes which have taken place in these countries, although each has different origins and effects in each of these national cases. Increased concentration, the media convergence with telecommunications and the Internet, the growing financial dependence of the sector, the foreign acquisition of a significant amount of their property at the hands of multinational firms and the crisis of the current regulatory frameworks are the main frameworks for understanding the transformation of the media in the Southern Cone of Latin America. The processes of change identified to describe and analyze the evolution of Brazilian, Argentine, Chilean and Uruguayan media in recent years could not have been achieved without the collaboration of different governments and the radical transformations in the management and ownership patterns of these media.
Uso de técnicas geomáticas para el mapeo y caracterización de unidades geomórficas de la Ciudad de Buenos Aires (Argentina) mediante interpretación visual de parámetros morfométricos
Nabel, Paulina Esther;Becerra Serial, Rodrigo Martín;
Boletín de la Sociedad Geológica Mexicana , 2008,
Abstract: buenos aires city is located on an extensive plain region. the recognition of the geomorphic features in such urbanized environments is especially difficult because they have been smoothed or covered by pavement and buildings. nevertheless, characterizing and locating the geomorphologic features provides valuable information for the management of many of the environmental problems of the city of buenos aires, where floods are the main natural environmental problem. the understanding of geomorphology and drainage systems behavior, is essential for the design of structural building works and for contingency plans that will minimize disruptions and economic loses generated during such events. this paper presents a methodology for the study of the topographical and geomorphic features of the city of buenos aires, also replicable in similar urban environments. in these environments the recognition of geomorphic units, based on quantitative, morphometric parameters, is possible when these are obtained from high resolution sources such as cartography to a scale of (e.g. 1:5000) or from photogrametric surveys, that do, however, have numerous interferences in urban areas, resulting less efficient. the current study counted on a significant number of data, an essential requirement to achieve the objective of this work, thanks to the existence of previous, detailed, topographic surveys. the mapping of geomorphic main units and subunits of the city of buenos aires, was performed by visual interpretation of morphometric parameters derived from a digital terrain model using geomatic technologies. the digital terrain model (dim) was constructed from contours of an equidistance ofl m, originally produced from a vectorial base of digitally enclosed points with an average density of 3.97 points /ha. the non-linear interpolation method 'non-linear rubber sheeting 'was used to construct the dim, on the base of the aforementioned contours. a shaded relief model was generated (azimuth: 4
Stem cells therapy for regenerative medicine: Principles of present and future practice  [PDF]
José A. Andrades, José Becerra, Ramón Mu?oz-Chápuli, Salvador Martínez, ángel Raya, Javier García-Sancho, José M. Moraleda
Journal of Biomedical Science and Engineering (JBiSE) , 2014, DOI: 10.4236/jbise.2014.72008
Abstract: The characterization and isolation of various stem cell populations, from embryonic to tissue-derived stem cells and induced pluripotent stem cells (iPSCs), have led to a rapid growth in the field of stem cell research and its potentially clinical application in the field of regenerative medicine and tissue repair. Stem cell therapy has recently progressed from the preclinical to the early clinical trial arena for a variety of diseases states, although further knowledge on action mechanisms, long-term safety issues, and standardization and characterization of the therapeutic cell products remains to be thoroughly elucidated. In this paper we summarize the current state of the art of basic and clinical research that were highlighted at the 2012 meeting of the Spanish Cell Therapy Network. This includes the current research involving in genomic and transcriptomic characterization of selected stem cell populations, studies of the role of resident and transplanted stem cells during tissue regeneration and their mechanism of action, improved new strategies of tissue engineering, transplantation of mesenchymal stem cells (MSCs) in different animal models of disease, disease correction by iPSCs, and preliminary results of cell therapy in human clinical trials.
Efectos sobre la capacidad de resolución de problemas de "lápiz y papel"de una ense?anza-aprendizaje de la física con una estructura problematizada
Becerra-Labra, Carlos;Gras-Martí, Albert;Martínez-Torregrosa, Joaquín;
Revista Brasileira de Ensino de Física , 2010, DOI: 10.1590/S1806-11172010000200010
Abstract: we discuss the results of a research conducted to study the effects of problem-based teaching and learning of physics on the ability of students in problem solving and in their attitudes and interest towards the subject. first-year university students are involved in the study. we try to answer this basic question: can a problem-based instruction of physics improve the ability of students in problem solving and does this ability still remain some time after the end of the course?
La Física con una estructurada problematizada: efectos sobre el aprendizaje conceptual, las actitudes e intereses de los estudiantes universitarios
Becerra-Labra, Carlos;Gras-Martí, Albert;Martínez-Torregrosa, Joaquín;
Revista Brasileira de Ensino de Física , 2007, DOI: 10.1590/S1806-11172007000100016
Abstract: we show the results of a research addressing the effects of organizing the teaching of physics around a problem-based structure. this approach is based upon outlining and addressing the fundamental problems that originated the basic concepts and theoretical framework of the subject matter. we have measured the significant improvement observed in both the students' conceptual understanding and in their attitude and interest towards physics. we have also investigated whether these learning gains are maintained after the course is over, or a relatively large time has elapsed.
?De verdad se ense?a a resolver problemas en el primer curso de física universitaria? la resolución de problemas de "lápiz y papel" en cuestión
Labra, Carlos Becerra;Gras-Martí, Albert;Martínez-Torregrosa, Joaquín;
Revista Brasileira de Ensino de Física , 2005, DOI: 10.1590/S0102-47442005000200016
Abstract: one of the expectations in science education nowadays is to teach people how to solve problems, to develop high-level intellectual skills at the same time that specific knowledge is acquired. in common practice of physics education, this objective is usually limited to solving "paper and pencil" problems appearing at the end of each book chapter. however, the widespread failure of students in this activity forces us to question if, indeed, we are teaching them how to solve problems. an analysis of both textbooks and teachers' practices shows that students are not taught how to solve problems but, instead, ready-made solutions are just explained to the students. this procedure transmits serious deficiencies both in attitudinal and methodological terms, which makes it very difficult for them to tackle new problems.
PROCEDIMIENTOS PARA LA RUPTURA O CAMBIO DE LA (IN)SENSIBILIDAD A LAS CONTINGENCIAS Y EL CONTROL VERBAL
GóMEZ-BECERRA,INMACULADA; LóPEZ - MARTíN,NIEVES; MORENO SANPEDRO,EMILIO;
Revista Latinoamericana de Psicología , 2008,
Abstract: abstract this paper, framed into the analysis of (in) sensibility to contingencies and its implications in the analysis of verbal regulation, pretends to assess the effectiveness of several methods in order to produce breaking or change of the sensibility patterns, as well as to find attainable differential effects of automatic contingencies in two experimental tasks, using an eight university student's sample. the results show that the use of contextual cues, by means of the amplification or changes in the given rules, is the best procedure to break certain levels of insensibility. the data also show the absence of differential effects of each task contingencies.
Esterilización tubaria transvaginal: serie de casos
Hernán Quinchavil A,Francisco Kaplan D,Magaly Martínez L,Oscar Becerra A
Revista Chilena de Obstetricia y Ginecología , 2011,
Abstract: Antecedentes: La esterilización tubaria transvaginal, es una forma de abordar la esterilización quirúrgica, en la actualidad poco popularizada. Objetivo: Evaluar la colpotomía posterior como vía para la esterilización tubaria. Método: Análisis de 100 fichas clínicas de mujeres multíparas en estado no puerperal, a solicitud voluntaria de esterilización. Resultados: Hubo un 3% de complicaciones. Conversiones en el 4% y un tiempo operatorio promedio de 25,2 minutos. Conclusión: La colpotomía posterior es una buena alternativa quirúrgica para efectuar la esterilización tubaria, con baja morbilidad. Background: Transvaginal tubal sterilization is a way for surgical sterilization, that currently is not widely used. Objective: To evaluate the posterior colpotomy as a pathway for tubal sterilization. Method: Analysis of 100 medical records of multiparous women non puerperal state, who request voluntary sterilization. Results: There were 3% of complications, 4% of conversions and a mean operative time of 25.2 minutes. Conclusion: The posterior colpotomy is a good surgical alternative to perform tubal sterilization with low morbidity and cost.
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