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Search Results: 1 - 10 of 60250 matches for " Luis Antonio; "
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Optimization of Micromechanical Cleavage Technique of Natural Graphite by Chemical Treatment  [PDF]
Luis Torres, Luis Gomez Armas, Antonio Carlos Seabra
Graphene (Graphene) , 2014, DOI: 10.4236/graphene.2014.31001
Abstract:

In this work,we report a method to improve the efficiency of the micromechanical cleavage technique to obtain few-layers graphene samples, from natural graphite flakes, which were previously submitted to two chemical treatment times with H2SO4(17 and 25 hours). After the chemical treatment times, Raman spectroscopy reveals a hydrogenation of the few-layer graphene samples, which were obtained from the treated graphite flakes. To analyze the hydrogenation of the samples, the G and 2D bands of the Raman spectra of the treated and un-treated samples were analyzed and compared, as well as the I(2D)/I(G) ratio, revealing a p-doping on the treated samples when compared with the untreated samples. Our studies could be of great importance to obtain larger and greater amount of few-layer graphene samples.

ERP Software Selection Processes: A Case Study inthe Metal Transformation Sector  [PDF]
Antonio Hidalgo, José Albors, Luis Gómez
Intelligent Information Management (IIM) , 2011, DOI: 10.4236/iim.2011.31001
Abstract: When a firm decides to implement ERP softwares, the resulting consequences can pervade all levels, includ- ing organization, process, control and available information. Therefore, the first decision to be made is which ERP solution must be adopted from a wide range of offers and vendors. To this end, this paper describes a methodology based on multi-criteria factors that directly affects the process to help managers make this de- cision. This methodology has been applied to a medium-size company in the Spanish metal transformation sector which is interested in updating its IT capabilities in order to obtain greater control of and better infor- mation about business, thus achieving a competitive advantage. The paper proposes a decision matrix which takes into account all critical factors in ERP selection.
Trancultura??o e novas utopias
Groppo, Luis Antonio;
Lua Nova: Revista de Cultura e Política , 2005, DOI: 10.1590/S0102-64452005000100006
Abstract: out of the endeavour of some progressive social thinkers situated in the peripheral world, this article relates the transcultural phenomenon - conceived as the "other side" of the processual galaxy called globalization - and the production, actual and possible, of new utopias. utopias resulted from the confrontation, contrast and interpenetration between forms of "western" rationality and socio-cultural forms of the peripheral world, which create new modes of rationality based on transculturation. the article concludes that the new progressive elaborations of the south, the "third world", where the transculturation process is more advanced, have potentially creative powers to better deal with the complex and large aspects of the modernization in the age of globalism.
Epidemiologia crítica: por uma práxis teórica do saber agir
Arreaza,Antonio Luis Vicente;
Ciência & Saúde Coletiva , 2012, DOI: 10.1590/S1413-81232012000400022
Abstract: some of the most significant questions related to the concept of health present in contemporary discursive practices, such as its relation with the normative capacity of the individuals when faced with the institution of new social and/or biological norms, are initially reexamined in this paper. subsequently, the dialectical model of the social determination process of health-disease is examined in the context of the contradictory processes of the social reproduction system as in the scope of the bio-psychological nexuses on outcome and its historically specific ways of life. the contradictory dimensions of the capitalist social reproduction process and their techno-economic logic of production and consumption are then analyzed, considering their respective impacts on the living and health conditions of citizens and communities. lastly, the importance of the emancipative praxis for epidemiology in the achievement of well-being and quality of life are considered and the need for commitment in the construction of a new paradigm for the public health field in its praxis of knowing how and when to act are emphasized.
El concepto de autoridad en el pensamiento de Aristóteles y su relación con el concepto de autoridad en el comportamiento administrativo
Cruz Soto, Luis Antonio;
Contaduría y administración , 2010,
Abstract: this paper analyzes the concept of authority in the thinking of aristotle and its relationship with the concept of authority in the administrative behavior. thus, we develop our arguments in two main parts: in the first one we analyze the concept of authority from the aristotle's view in order to define the elements of study that allow us to link such elements with the concept of authority in the administrative behavior; in the second part, we build the meaning of the authority in the administrative behavior to determine its conceptual relationship with the concept of authority in the aristotelian thought. we hold that the concept of authority is defined by the legitimacy both in the view of aristotle as in the view of the administrative behavior. therefore, we assume that the legitimacy of the domination: a) seeks the rational recognition by the actors that are facing the content of the mandates and, b) at the same time, it generates processes of functional validity through the relevant provisions arising from those mandates. we conclude that the authority, be it in the aristotelian sense or in the sense of the administrative behavior, is guided by the legitimacy which in turn is based on recognition -informed, rational and voluntary- from the perspective of the individuals who are dominated.
Contaminación del aire en Ciudad de La Habana: uso de muestreadores pasivos
Bonito Lara,Luis Antonio;
Revista Cubana de Higiene y Epidemiolog?-a , 1998,
Abstract: the estimation of the sulphatizing index was carried out during a year by using an alkaline plate technique and passive samplers in an orthogonally-designed network covering the central muncipalities of the city of havana. the results allowed to record the differences in the sulphations levels in an over 60 km2 are and also to draw up an isoline map of sulphate concentrations which made the detection of the main fired polluting sources in the territory possible.
Corrupción y desigualdad en la Unión Europea
Trejo Fuentes,Luis Antonio;
Revista de Estudios Sociales , 2010,
Abstract: the central focus on this study is trust in government, including the perception of corruption that different groups have regarding the relationships between the actions of european union-member states and their distributive policies. are states with more resources immune to corruption? is there a relationship between income inequality and the level of corruption in a country? are countries with strong welfare states or with social-democratic policies less corrupt? this article reviews these and other questions theoretically and through a quantitative, cross-sectional analysis based on data from a governance study by the world bank. it shows the importance of taking corruption into account, as well as effective self-regulation by corporations, in the design of public policies.
El concepto de legitimidad en la autoridad: elementos de análisis para comprender la relación autoridad-subordinación en el comportamiento administrativo
Luis Antonio Cruz Soto
Academia : Revista Latinoamericana de Administración , 2008,
Abstract: El objetivo de este trabajo consiste en analizar el concepto de legitimidad de laautoridad en el comportamiento administrativo. La relevancia de los procesos de legitimación en la relación autoridad-subordinación estriba en reconocer la validez de las acciones en la función administrativa que permita el reconocimiento subjetivo de los actores y, de esta manera, lograr diferenciarlos del carácter legal de los actos. En el ámbito administrativo se proponen dos dimensiones de estudio: la legitimidad que otorga la estructura formal, fundada en el aparato normativo, y la legitimidad consensual, sustentada en la validez de los miembros, independientemente de las reglas, a la que Henry Fayol y otros denominaron autoridadmoral o personal. En este trabajo sostengo que lo que define el significado de la autoridad en la administración es la legitimidad, la cual no se deriva de la legalidad contenida en la estructura formal, sino en el reconocimiento consensuado de los participantes, que validan el actuar de la autoridad.
El concepto de legitimidad en la autoridad: elementos de nálisis para comprender la relación autoridad-subordinación en el comportamiento administrativo
Luis Antonio Cruz Soto
Academia : Revista Latinoamericana de Administración , 2008,
Abstract: El objetivo de este trabajo consiste en analizar el concepto de legitimidad de la autoridad en el comportamiento administrativo. La relevancia de los procesos de legitimación en la relación autoridad-subordinación estriba en reconocer la validez de las acciones en la función administrativa que permita el reconocimiento subjetivo de los actores y, de esta manera, lograr diferenciarlos del carácter legal de los actos. En el ámbito administrativo se proponen dos dimensiones de estudio: la legitimidad que otorga la estructura formal, fundada en el aparato normativo, y la legitimidad consensual, sustentada en la validez de los miembros, independientemente de las reglas, a la que Henry Fayol y otros denominaron autoridad moral o personal. En este trabajo sostengo que lo que define el significado de la autoridad en la administración es la legitimidad, la cual no se deriva de la legalidad contenida en la estructura formal, sino en el reconocimiento consensuado de los participantes, que validan el actuar de la autoridad
Estado y universidad en brasil: Cooperación y conflicto
Luis Antonio Cunha
Perfiles educativos , 1995,
Abstract: Este trabajo nos presenta un panorama general del sistema universitario brasile o, el que en términos absolutos, constituye el más grande de la región. En Brasil, a diferencia de lo que acontece en la mayor parte de América Latina, la mayor parte de la población estudiantil asiste a instituciones universitarias de carácter privado. Sin embargo, las instituciones de mayor prestigio académico son las universidades públicas. El autor discute algunas de las repercusiones de la reforma universitaria emprendida durante los a os sesenta y analiza las circunstancias actuales en las que una nueva reforma es previsible. Uno de los conflictos sobre los que Cunha llama la atención es el que existe en el ámbito de la evaluación institucional, al pasar de la autoevaluación a la evaluación basada en el desempe o de las instituciones universitarias.
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