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Fuzzy Logic Application in Risk Analysis Due to Lightning Aplicación de la Lógica Difusa al Análisis de Riesgo por Rayo. Parte I
Yelennis Godoy Valladares,Olga Susana Suárez Hernández
Revista Cubana de Ingeniería , 2010, DOI: 10.1234/rci.v1i2.12
Abstract: This work uses the application of the fuzzy logic to the analysis of risk on the base of the approaches picked up in the IEC 62305-2, with the objective of developing a simple tool, of easy use and understanding, which offers the designer the possibility of a bigger interpretation to the subjectivity wrapped in the analysis using the language to evaluate the characteristics of the installation in study and the risk of lightning impact. En este trabajo se aplica la teoría de la lógica difusa al análisis de riesgo por rayo sobre la base de los criterios recogidos en la IEC 62305-2, con el objetivo de desarrollar una herramienta sencilla, de fácil utilización y entendimiento, que le brinde al dise ador la posibilidad de una mayor interpretación a la subjetividad envuelta en el análisis, utilizando el lenguaje apropiado para evaluar las características de la instalación en estudio y el riesgo de impacto por rayo. Este tema se extenderá a otro artículo, que será publicado en un próximo número de la Revista.
Application of Fuzzy Logic in the Analysis of Lightning Risk Aplicación práctica del análisis de riesgo por rayo utilizando lógica difusa
Yelennis Godoy Valladares,Olga Susana Suárez Hernández
Revista Cubana de Ingeniería , 2010, DOI: 10.1234/rci.v1i3.27
Abstract: In this paper the diffuse tool of analysis of risk of lightning impact in structures is presented for the conditions of Cuba, as well as its application in a specific case as part of its validation. En este artículo se presenta la herramienta difusa de análisis de riesgo de impacto de rayo en edificaciones para las condiciones de Cuba, así como su aplicación en un caso específico como parte de su validación. Los fundamentos de la teoría de la logica difusa fueron tratados en un artículo publicado con anterioridad en esta revista.
Reproductive behavior in Liolaemus manueli (Reptilia, Liolaemidae) and its relevance in an ex situ conservation program
Valladares Faúndez,Pablo; Briones Godoy,Wilfredo;
Idesia (Arica) , 2012, DOI: 10.4067/S0718-34292012000300015
Abstract: in this note we report the first case of courtship, mating and birth of liolaemus manueli in captivity. specimens were captured near their terra typica, as a product of human intervention in the area, and were deposited in a terrarium for later release. however, in the following days we observed courtship behavior and copulation in a pair of individuals of this species. according to these observations we discuss the potential of an ex situ conservation program for this species, since their natural habitat is strongly threatened.
Reproductive behavior in Liolaemus manueli (Reptilia, Liolaemidae) and its relevance in an ex situ conservation program Conducta reproductiva en Liolaemus manueli (Reptilia, Liolaemidae) y su relevancia en un programa de conservación ex situ
Pablo Valladares Faúndez,Wilfredo Briones Godoy
IDESIA , 2012,
Abstract: In this note we report the first case of courtship, mating and birth of Liolaemus manueli in captivity. Specimens were captured near their Terra typica, as a product of human intervention in the area, and were deposited in a terrarium for later release. However, in the following days we observed courtship behavior and copulation in a pair of individuals of this species. According to these observations we discuss the potential of an ex situ conservation program for this species, since their natural habitat is strongly threatened. En la presente nota reportamos el primer caso de cortejo, cópula y parto en condiciones de cautividad en Liolaemus manueli. Los especímenes fueron capturados cerca de su Terra typica, producto de la intervención antrópica de la zona, y fueron depositados en un terrario para su posterior liberación. Sin embargo, a los pocos días ocurrió el cortejo y cópula de una pareja de individuos de esta especie. De acuerdo a estas observaciones, discutimos la potencialidad de criar en cautiverio a esta especie con fines conservacionistas, dado que su hábitat natural está fuertemente amenazado.
Las competencias en la educación científica. Tensiones desde el pragmatismo epistemológico
Valladares, Liliana;
Perfiles educativos , 2011,
Abstract: actually the focus on education by competences has become a matter of central interest in educational research because of its influence on many of the educational reforms. nevertheless the notion of competence, and particularly in scientific education, is still ambiguous and sets out many questions, not only for psychology, pedagogy and didactics, but also for the epistemology. this paper is a contribution to the understanding of the competences from the epistemological pragmatism. from this philosophical framework the author debates on three tensions within the relation between the competences and the process of knowledge: a) about the idea of knowledge; b) about the structure of competences; and c) about the role of the context. the author argües that in most of the definitions of competences the knowledge are reduced to their merely declarative aspect, instead of understanding it in a comprehensive way as actions.
A gênese da favela carioca. A produ??o anterior às ciências sociais
Valladares, Licia;
Revista Brasileira de Ciências Sociais , 2000, DOI: 10.1590/S0102-69092000000300001
Abstract: the article shows the role occupied by the favela and its residents in political and social debate during the first half of the 20th century. it highlights the production of knowledge generated by journalists, physicians, engineers and social workers in the period preceding the development of social sciences and the university in brazil. it proposes that the process of construction of social representation of the favela, begun at that time, should be analyzed as a periodization beginning at a different moment than the periodization which is traditionally accepted based on the relation of the favela to the state and the type of political regime in power at different historical moments. the author suggests a periodization that has its initial moment marked by a myth of origin, euclides da cunha's vision of the settlement of canudos in his book os sert?es. in this period the favela of rio de janeiro is discovered and described by transposing the duality of coastal versus bush country (sert?es) to the urban scene, through the opposition of city to favela. following the discovery period is a second period when the favela is transformed into a social and urban problem, followed by a third period, when the idea of administrating the problem takes the form of concrete policies and measures. a fourth period includes the production of official data and the transformation of a local phenomenon into a national reality. the article shows that the centenary favela corresponds to an almost centennial social representation, an important legacy that today's social science can not disregard.
La educación científica intercultural y el enfoque de las capacidades
Valladares,Liliana;
Revista iberoamericana de ciencia tecnolog?-a y sociedad , 2011,
Abstract: this paper presents data related to the human development report of the indigenous people's lives and situation in mexico. this report reflects the social exclusion in which they live, particularly in the field of education and science education. the idea behind this paper is proposing the creation of an intercultural science education program as a strategy for expanding the capabilities of people to do and be what they have reason to value. intercultural science education is based on three conditions: 1) a pluralistic perspective of knowledge; 2) a socio-cultural perspective of education based on the achievement of competent performance on socially relevant situations; and 3) the conversion of the plurality of cognitive resources into real opportunities to improve people's lives and capabilities.
La política de Olivares y Portugal
Rafael VALLADARES
Libros de la Corte.es , 2012,
Abstract:
Cambio global, un nuevo reto para la vieja Europa
F. Valladares
Ecosistemas , 2005,
Abstract:
GLOBIMED, una red temática sobre cambio global y biodiversidad en ecosistemas forestales mediterráneos
Fernando Valladares
Ecosistemas , 2003,
Abstract:
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